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airlift bioreactor</title> <meta name="description" content="Search results for: stirred airlift bioreactor"> <meta name="keywords" content="stirred airlift bioreactor"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button 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action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="stirred airlift bioreactor"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 218</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: stirred airlift bioreactor</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">218</span> Oxygen Transfer in Viscous Non-Newtonian Liquid in a Hybrid Bioreactor</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S%C3%A9rgio%20S.%20de%20Jesus">Sérgio S. de Jesus</a>, <a href="https://publications.waset.org/abstracts/search?q=Aline%20Santana"> Aline Santana</a>, <a href="https://publications.waset.org/abstracts/search?q=Rubens%20Maciel%20Filho"> Rubens Maciel Filho </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Global oxygen transfer coefficient (kLa) was characterized in a mechanically agitated airlift bio reactor. The experiments were carried out in an airlift bio reactor (3.2 L) with internal re circulation (a concentric draft-tube airlift vessel device); the agitation is carried out through a turbine Rushton impeller located along with the gas sparger in the region comprised in the riser. The experiments were conducted using xanthan gum (0.6%) at 250 C and a constant rotation velocity of 0 and 800 rpm, as well as in the absence of agitation (airlift mode); the superficial gas velocity varied from 0.0157 to 0.0262 ms-1. The volumetric oxygen transfer coefficient dependence of the rotational speed revealed that the presence of agitation increased up to two times the kLa value. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=aeration" title="aeration">aeration</a>, <a href="https://publications.waset.org/abstracts/search?q=mass%20transfer" title=" mass transfer"> mass transfer</a>, <a href="https://publications.waset.org/abstracts/search?q=non-Newtonian%20fluids" title=" non-Newtonian fluids"> non-Newtonian fluids</a>, <a href="https://publications.waset.org/abstracts/search?q=stirred%20airlift%20bioreactor" title=" stirred airlift bioreactor"> stirred airlift bioreactor</a> </p> <a href="https://publications.waset.org/abstracts/11943/oxygen-transfer-in-viscous-non-newtonian-liquid-in-a-hybrid-bioreactor" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/11943.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">460</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">217</span> Investigation of Growth Yield and Antioxidant Activity of Monascus purpureus Extract Isolated from Stirred Tank Bioreactor</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Pourshirazi">M. Pourshirazi</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Esmaelifar"> M. Esmaelifar</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Aliahmadi"> A. Aliahmadi</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20Yazdian"> F. Yazdian</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20S.%20Hatamian%20Zarami"> A. S. Hatamian Zarami</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20J.%20Ashrafi"> S. J. Ashrafi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Monascus purpureus is an antioxidant-producing fungus whose secondary metabolites can be used in drug industries. The growth yield and antioxidant activity of extract were investigated in 3-L liquid fermentation media in a 5-L stirred tank bioreactor (STD) at 30°C, pH 5.93 and darkness for 4 days with 150 rpm agitation and 40% dissolved oxygen. Results were compared to extract isolated from Erlenmeyer flask with the same condition. The growth yield was 0.21 and 0.17 in STD condition and Erlenmeyer flask, respectively. Furthermore, the IC50 of DPPH scavenging activity was 256.32 µg/ml and 150.43 µg/ml for STD extract and flask extract, respectively. Our data demonstrated that transferring the growth condition into the STD caused an increase in growth yield but not in antioxidant activity. Accordingly, there is no relationship between growth rate and secondary metabolites formation. More studies are needed to determine the mass transfer coefficient and also evaluating the hydrodynamic condition have to be done in the future studies. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Monascus%20purpureus" title="Monascus purpureus">Monascus purpureus</a>, <a href="https://publications.waset.org/abstracts/search?q=bioreactor" title=" bioreactor"> bioreactor</a>, <a href="https://publications.waset.org/abstracts/search?q=antioxidant" title=" antioxidant"> antioxidant</a>, <a href="https://publications.waset.org/abstracts/search?q=growth%20yield" title=" growth yield"> growth yield</a> </p> <a href="https://publications.waset.org/abstracts/9632/investigation-of-growth-yield-and-antioxidant-activity-of-monascus-purpureus-extract-isolated-from-stirred-tank-bioreactor" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/9632.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">404</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">216</span> Evaluation of Mixing and Oxygen Transfer Performances for a Stirred Bioreactor Containing P. chrysogenum Broths</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20C.%20Blaga">A. C. Blaga</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20C%C3%A2rlescu"> A. Cârlescu</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Turnea"> M. Turnea</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20I.%20Galaction"> A. I. Galaction</a>, <a href="https://publications.waset.org/abstracts/search?q=D.%20Ca%C5%9Fcaval"> D. Caşcaval </a> </p> <p class="card-text"><strong>Abstract:</strong></p> The performance of an aerobic stirred bioreactor for fungal fermentation was analyzed on the basis of mixing time and oxygen mass transfer coefficient, by quantifying the influence of some specific geometrical and operational parameters of the bioreactor, as well as the rheological behavior of Penicillium chrysogenum broth (free mycelia and mycelia aggregates). The rheological properties of the fungus broth, controlled by the biomass concentration, its growth rate, and morphology strongly affect the performance of the bioreactor. Experimental data showed that for both morphological structures the accumulation of fungus biomass induces a significant increase of broths viscosity and modifies the rheological behavior. For lower P. chrysogenum concentrations (both morphological conformations), the mixing time initially increases with aeration rate, reaches a maximum value and decreases. This variation can be explained by the formation of small bubbles, due to the presence of solid phase which hinders the bubbles coalescence, the rising velocity of bubbles being reduced by the high apparent viscosity of fungus broths. By biomass accumulation, the variation of mixing time with aeration rate is gradually changed, the continuous reduction of mixing time with air input flow increase being obtained for 33.5 g/l d.w. P. chrysogenum. Owing to the superior apparent viscosity, which reduces considerably the relative contribution of mechanical agitation to the broths mixing, these phenomena are more pronounced for P. chrysogenum free mycelia. Due to the increase of broth apparent viscosity, the biomass accumulation induces two significant effects on oxygen transfer rate: the diminution of turbulence and perturbation of bubbles dispersion - coalescence equilibrium. The increase of P. chrysogenum free mycelia concentration leads to the decrease of kla values. Thus, for the considered variation domain of the main parameters taken into account, namely air superficial velocity from 8.36 10-4 to 5.02 10-3 m/s and specific power input from 100 to 500 W/m3, kla was reduced for 3.7 times for biomass concentration increase from 4 to 36.5 g/l d.w. The broth containing P. crysogenum mycelia aggregates exhibits a particular behavior from the point of view of oxygen transfer. Regardless of bioreactor operating conditions, the increase of biomass concentration leads initially to the increase of oxygen mass transfer rate, the phenomenon that can be explained by the interaction of pellets with bubbles. The results are in relation with the increase of apparent viscosity of broths corresponding to the variation of biomass concentration between the mentioned limits. Thus, the apparent viscosity of the suspension of fungus mycelia aggregates increased for 44.2 times and fungus free mycelia for 63.9 times for CX increase from 4 to 36.5 g/l d.w. By means of the experimental data, some mathematical correlations describing the influences of the considered factors on mixing time and kla have been proposed. The proposed correlations can be used in bioreactor performance evaluation, optimization, and scaling-up. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=biomass%20concentration" title="biomass concentration">biomass concentration</a>, <a href="https://publications.waset.org/abstracts/search?q=mixing%20time" title=" mixing time"> mixing time</a>, <a href="https://publications.waset.org/abstracts/search?q=oxygen%20mass%20transfer" title=" oxygen mass transfer"> oxygen mass transfer</a>, <a href="https://publications.waset.org/abstracts/search?q=P.%20chrysogenum%20broth" title=" P. chrysogenum broth"> P. chrysogenum broth</a>, <a href="https://publications.waset.org/abstracts/search?q=stirred%20bioreactor" title=" stirred bioreactor"> stirred bioreactor</a> </p> <a href="https://publications.waset.org/abstracts/8050/evaluation-of-mixing-and-oxygen-transfer-performances-for-a-stirred-bioreactor-containing-p-chrysogenum-broths" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/8050.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">340</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">215</span> Prediction of Oxygen Transfer and Gas Hold-Up in Pneumatic Bioreactors Containing Viscous Newtonian Fluids</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Caroline%20E.%20Mendes">Caroline E. Mendes</a>, <a href="https://publications.waset.org/abstracts/search?q=Alberto%20C.%20Badino"> Alberto C. Badino</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Pneumatic reactors have been widely employed in various sectors of the chemical industry, especially where are required high heat and mass transfer rates. This study aimed to obtain correlations that allow the prediction of gas hold-up (Ԑ) and volumetric oxygen transfer coefficient (kLa), and compare these values, for three models of pneumatic reactors on two scales utilizing Newtonian fluids. Values of kLa were obtained using the dynamic pressure-step method, while  was used for a new proposed measure. Comparing the three models of reactors studied, it was observed that the mass transfer was superior to draft-tube airlift, reaching  of 0.173 and kLa of 0.00904s-1. All correlations showed good fit to the experimental data (R2≥94%), and comparisons with correlations from the literature demonstrate the need for further similar studies due to shortage of data available, mainly for airlift reactors and high viscosity fluids. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bubble%20column" title="bubble column">bubble column</a>, <a href="https://publications.waset.org/abstracts/search?q=internal%20loop%20airlift" title=" internal loop airlift"> internal loop airlift</a>, <a href="https://publications.waset.org/abstracts/search?q=gas%20hold-up" title=" gas hold-up"> gas hold-up</a>, <a href="https://publications.waset.org/abstracts/search?q=kLa" title=" kLa"> kLa</a> </p> <a href="https://publications.waset.org/abstracts/2744/prediction-of-oxygen-transfer-and-gas-hold-up-in-pneumatic-bioreactors-containing-viscous-newtonian-fluids" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/2744.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">274</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">214</span> Establishment and Validation of Correlation Equations to Estimate Volumetric Oxygen Mass Transfer Coefficient (KLa) from Process Parameters in Stirred-Tank Bioreactors Using Response Surface Methodology</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jantakan%20Jullawateelert">Jantakan Jullawateelert</a>, <a href="https://publications.waset.org/abstracts/search?q=Korakod%20Haonoo"> Korakod Haonoo</a>, <a href="https://publications.waset.org/abstracts/search?q=Sutipong%20Sananseang"> Sutipong Sananseang</a>, <a href="https://publications.waset.org/abstracts/search?q=Sarun%20Torpaiboon"> Sarun Torpaiboon</a>, <a href="https://publications.waset.org/abstracts/search?q=Thanunthon%20Bowornsakulwong"> Thanunthon Bowornsakulwong</a>, <a href="https://publications.waset.org/abstracts/search?q=Lalintip%20Hocharoen"> Lalintip Hocharoen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Process scale-up is essential for the biological process to increase production capacity from bench-scale bioreactors to either pilot or commercial production. Scale-up based on constant volumetric oxygen mass transfer coefficient (KLa) is mostly used as a scale-up factor since oxygen supply is one of the key limiting factors for cell growth. However, to estimate KLa of culture vessels operated with different conditions are time-consuming since it is considerably influenced by a lot of factors. To overcome the issue, this study aimed to establish correlation equations of KLa and operating parameters in 0.5 L and 5 L bioreactor employed with pitched-blade impeller and gas sparger. Temperature, gas flow rate, agitation speed, and impeller position were selected as process parameters and equations were created using response surface methodology (RSM) based on central composite design (CCD). In addition, the effects of these parameters on KLa were also investigated. Based on RSM, second-order polynomial models for 0.5 L and 5 L bioreactor were obtained with an acceptable determination coefficient (R²) as 0.9736 and 0.9190, respectively. These models were validated, and experimental values showed differences less than 10% from the predicted values. Moreover, RSM revealed that gas flow rate is the most significant parameter while temperature and agitation speed were also found to greatly affect the KLa in both bioreactors. Nevertheless, impeller position was shown to influence KLa in only 5L system. To sum up, these modeled correlations can be used to accurately predict KLa within the specified range of process parameters of two different sizes of bioreactors for further scale-up application. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=response%20surface%20methodology" title="response surface methodology">response surface methodology</a>, <a href="https://publications.waset.org/abstracts/search?q=scale-up" title=" scale-up"> scale-up</a>, <a href="https://publications.waset.org/abstracts/search?q=stirred-tank%20bioreactor" title=" stirred-tank bioreactor"> stirred-tank bioreactor</a>, <a href="https://publications.waset.org/abstracts/search?q=volumetric%20oxygen%20mass%20transfer%20coefficient" title=" volumetric oxygen mass transfer coefficient"> volumetric oxygen mass transfer coefficient</a> </p> <a href="https://publications.waset.org/abstracts/95352/establishment-and-validation-of-correlation-equations-to-estimate-volumetric-oxygen-mass-transfer-coefficient-kla-from-process-parameters-in-stirred-tank-bioreactors-using-response-surface-methodology" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/95352.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">206</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">213</span> Stimulation of Stevioside Accumulation on Stevia rebaudiana (Bertoni) Shoot Culture Induced with Red LED Light in TIS RITA® Bioreactor System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Vincent%20Alexander">Vincent Alexander</a>, <a href="https://publications.waset.org/abstracts/search?q=Rizkita%20Esyanti"> Rizkita Esyanti</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Leaves of <em>Stevia rebaudiana</em> contain steviol glycoside which mainly comprise of stevioside, a natural sweetener compound that is 100-300 times sweeter than sucrose. Current cultivation method of <em>Stevia rebaudiana</em> in Indonesia has yet to reach its optimum efficiency and productivity to produce stevioside as a safe sugar substitute sweetener for people with diabetes. An alternative method that is not limited by environmental factor is <em>in vitro </em>temporary immersion system (TIS) culture method using recipient for automated immersion (RITA<sup>®</sup>) bioreactor. The aim of this research was to evaluate the effect of red LED light induction towards shoot growth and stevioside accumulation in TIS RITA<sup>®</sup> bioreactor system, as an endeavour to increase the secondary metabolite synthesis. The result showed that the stevioside accumulation in TIS RITA<sup>®</sup> bioreactor system induced with red LED light for one hour during night was higher than that in TIS RITA<sup>®</sup> bioreactor system without red LED light induction, i.e. 71.04 ± 5.36 μg/g and 42.92 ± 5.40 μg/g respectively. Biomass growth rate reached as high as 0.072 ± 0.015/day for red LED light induced TIS RITA<sup>®</sup> bioreactor system, whereas TIS RITA<sup>®</sup> bioreactor system without induction was only 0.046 ± 0.003/day. Productivity of <em>Stevia rebaudiana </em>shoots induced with red LED light was 0.065 g/L medium/day, whilst shoots without any induction was 0.041 g/L medium/day. Sucrose, salt, and inorganic consumption in both bioreactor media increased as biomass increased. It can be concluded that <em>Stevia rebaudiana </em>shoot in TIS RITA<sup>®</sup> bioreactor induced with red LED light produces biomass and accumulates higher stevioside concentration, in comparison to bioreactor without any light induction. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=LED" title="LED">LED</a>, <a href="https://publications.waset.org/abstracts/search?q=Stevia%20rebaudiana" title=" Stevia rebaudiana"> Stevia rebaudiana</a>, <a href="https://publications.waset.org/abstracts/search?q=Stevioside" title=" Stevioside"> Stevioside</a>, <a href="https://publications.waset.org/abstracts/search?q=TIS%20RITA" title=" TIS RITA"> TIS RITA</a> </p> <a href="https://publications.waset.org/abstracts/54227/stimulation-of-stevioside-accumulation-on-stevia-rebaudiana-bertoni-shoot-culture-induced-with-red-led-light-in-tis-rita-bioreactor-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/54227.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">371</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">212</span> Application of Chitosan as a Natural Antimicrobial Compound in Stirred Yoghurt</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Javad%20Hesari">Javad Hesari</a>, <a href="https://publications.waset.org/abstracts/search?q=Tahereh%20Donyatalab"> Tahereh Donyatalab</a>, <a href="https://publications.waset.org/abstracts/search?q=Sodeif%20Azadmard%20Damirchi"> Sodeif Azadmard Damirchi</a>, <a href="https://publications.waset.org/abstracts/search?q=Reza%20Rezaii%20Mokaram"> Reza Rezaii Mokaram</a>, <a href="https://publications.waset.org/abstracts/search?q=Abbas%20Rafat"> Abbas Rafat</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The main objective of this research was to increase shelf life of stirred yoghurt by adding chitosan as a naturally antimicrobial compound. Chitosan were added at different concentrations (0.1, 0.3 and 0.6%) to the stirred yoghurt. Samples were stored at refrigerator and room temperature for 3 weeks and tested with respect of microbial properties (counts of starter bacteria, mold and yeast, coliforms and E. coli). Starter bacteria and yeast counts in samples containing chitosan was significantly (p<0.05) lower than those in control samples and its antibacterial and anti-yeast effects increased with increasing concentration of chitosan. The lowest counts of starter bacteria and yeast were observed at samples whit 0.6% of chitosan. The Results showed Chitosan had a positive effect on increasing shelf life and controlling of yeasts and therefore can be used as a natural preservative in stirred yogurt. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=chitosan" title="chitosan">chitosan</a>, <a href="https://publications.waset.org/abstracts/search?q=natural%20preservative" title=" natural preservative"> natural preservative</a>, <a href="https://publications.waset.org/abstracts/search?q=stirred%20yoghurt" title=" stirred yoghurt"> stirred yoghurt</a>, <a href="https://publications.waset.org/abstracts/search?q=self-life" title=" self-life"> self-life</a> </p> <a href="https://publications.waset.org/abstracts/32001/application-of-chitosan-as-a-natural-antimicrobial-compound-in-stirred-yoghurt" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/32001.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">465</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">211</span> Comparison of Growth Medium Efficiency into Stevia (Stevia rebaudiana Bertoni) Shoot Biomass and Stevioside Content in Thin-Layer System, TIS RITA® Bioreactor, and Bubble Column Bioreactor</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nurhayati%20Br%20Tarigan">Nurhayati Br Tarigan</a>, <a href="https://publications.waset.org/abstracts/search?q=Rizkita%20Rachmi%20Esyanti"> Rizkita Rachmi Esyanti</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Stevia (Stevia rebaudiana Bertoni) has a great potential to be used as a natural sweetener because it contains steviol glycoside, which is approximately 100 - 300 times sweeter than sucrose, yet low calories. Vegetative and generative propagation of S. rebaudiana is inefficient to produce stevia biomass and stevioside. One of alternative for stevia propagation is in vitro shoot culture. This research was conducted to optimize the best medium for shoot growth and to compare the bioconversion efficiency and stevioside production of S. rebaudiana shoot culture cultivated in thin layer culture (TLC), recipient for automated temporary immersion system (TIS RITA®) bioreactor, and bubble column bioreactor. The result showed that 1 ppm of Kinetin produced a healthy shoot and the highest number of leaves compared to BAP. Shoots were then cultivated in TLC, TIS RITA® bioreactor, and bubble column bioreactor. Growth medium efficiency was determined by yield and productivity. TLC produced the highest growth medium efficiency of S. rebaudiana, the yield was 0.471 ± 0.117 gbiomass.gsubstrate-1, and the productivity was 0.599 ± 0.122 gbiomass.Lmedium-1.day-1. While TIS RITA® bioreactor produced the lowest yield and productivity, 0.182 ± 0.024 gbiomass.gsubstrate-1 and 0.041 ± 0.0002 gbiomass.Lmedium-1.day-1 respectively. The yield of bubble column bioreactor was 0.354 ± 0.204 gbiomass.gsubstrate-1 and the productivity was 0,099 ± 0,009 gbiomass.Lmedium-1.day-1. The stevioside content from the highest to the lowest was obtained from stevia shoot which was cultivated on TLC, TIS RITA® bioreactor, and bubble column bioreactor; the content was 93,44 μg/g, 42,57 μg/g, and 23,03 μg/g respectively. All three systems could be used to produce stevia shoot biomass, but optimization on the number of nutrition and oxygen intake was required in each system. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bubble%20column" title="bubble column">bubble column</a>, <a href="https://publications.waset.org/abstracts/search?q=growth%20medium%20efficiency" title=" growth medium efficiency"> growth medium efficiency</a>, <a href="https://publications.waset.org/abstracts/search?q=Stevia%20rebaudiana" title=" Stevia rebaudiana"> Stevia rebaudiana</a>, <a href="https://publications.waset.org/abstracts/search?q=stevioside" title=" stevioside"> stevioside</a>, <a href="https://publications.waset.org/abstracts/search?q=TIS%20RITA%C2%AE" title=" TIS RITA®"> TIS RITA®</a>, <a href="https://publications.waset.org/abstracts/search?q=TLC" title=" TLC"> TLC</a> </p> <a href="https://publications.waset.org/abstracts/54234/comparison-of-growth-medium-efficiency-into-stevia-stevia-rebaudiana-bertoni-shoot-biomass-and-stevioside-content-in-thin-layer-system-tis-rita-bioreactor-and-bubble-column-bioreactor" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/54234.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">267</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">210</span> Single Species vs Mixed Microbial Culture Degradation of Pesticide in a Membrane Bioreactor</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Karan%20R.%20Chavan">Karan R. Chavan</a>, <a href="https://publications.waset.org/abstracts/search?q=Srivats%20Gopalan"> Srivats Gopalan</a>, <a href="https://publications.waset.org/abstracts/search?q=Kumudini%20V.%20Marathe"> Kumudini V. Marathe</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the current work, the comparison of degradation of malathion by single species, Pseudomonas Stutzeri, and Activated Sludge/Mixed Microbial Culture is studied in a Membrane Bioreactor. Various parameters were considered to study the effect of single species degradation compared to degradation by activated sludge. The experimental results revealed 85-90% reduction in the COD of the Malathion containing synthetic wastewater. Complete reduction of malathion was observed within 24 hours in both the cases. The critical flux was 10 LMH for both the systems. Fouling propensity, Cake and Membrane resistances were calculated thus giving an insight regarding the working of Membrane Bioreactor-based on single species and activated sludge. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fouling" title="fouling">fouling</a>, <a href="https://publications.waset.org/abstracts/search?q=membrane%20bioreactor" title=" membrane bioreactor"> membrane bioreactor</a>, <a href="https://publications.waset.org/abstracts/search?q=mixed%20microbial%20culture" title=" mixed microbial culture"> mixed microbial culture</a>, <a href="https://publications.waset.org/abstracts/search?q=single%20species" title=" single species"> single species</a> </p> <a href="https://publications.waset.org/abstracts/46965/single-species-vs-mixed-microbial-culture-degradation-of-pesticide-in-a-membrane-bioreactor" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/46965.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">358</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">209</span> Development of Closed System for Bacterial CO2 Mitigation </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Somesh%20Misha">Somesh Misha</a>, <a href="https://publications.waset.org/abstracts/search?q=Smita%20Raghuvanshi"> Smita Raghuvanshi</a>, <a href="https://publications.waset.org/abstracts/search?q=Suresh%20Gupta"> Suresh Gupta</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Increasing concentration of green house gases (GHG's), such as CO2 is of major concern and start showing its impact nowadays. The recent studies are focused on developing the continuous system using photoautotrophs for CO2 mitigation and simultaneous production of primary and secondary metabolites as a value addition. The advent of carbon concentrating mechanism had blurred the distinction between autotrophs and heterotrophs and now the paradigm has shifted towards the carbon capture and utilization (CCU) rather than carbon capture and sequestration (CCS). In the present work, a bioreactor was developed utilizing the chemolithotrophic bacterial species using CO2 mitigation and simultaneous value addition. The kinetic modeling was done and the biokinetic parameters are obtained for developing the bioreactor. The bioreactor was developed and studied for its operation and performance in terms of volumetric loading rate, mass loading rate, elimination capacity and removal efficiency. The characterization of effluent from the bioreactor was carried out for the products obtained using the analyzing techniques such as FTIR, GC-MS, and NMR. The developed bioreactor promised an economic, efficient and effective solution for CO2 mitigation and simultaneous value addition. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=CO2%20mitigation" title="CO2 mitigation">CO2 mitigation</a>, <a href="https://publications.waset.org/abstracts/search?q=bio-reactor" title=" bio-reactor"> bio-reactor</a>, <a href="https://publications.waset.org/abstracts/search?q=chemolithotrophic%20bacterial%20species" title=" chemolithotrophic bacterial species"> chemolithotrophic bacterial species</a>, <a href="https://publications.waset.org/abstracts/search?q=FTIR" title=" FTIR"> FTIR</a>, <a href="https://publications.waset.org/abstracts/search?q=GC-MS" title=" GC-MS"> GC-MS</a>, <a href="https://publications.waset.org/abstracts/search?q=NMR" title=" NMR"> NMR</a> </p> <a href="https://publications.waset.org/abstracts/18941/development-of-closed-system-for-bacterial-co2-mitigation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/18941.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">468</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">208</span> Simulation and Controller Tunning in a Photo-Bioreactor Applying by Taguchi Method</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hosein%20Ghahremani">Hosein Ghahremani</a>, <a href="https://publications.waset.org/abstracts/search?q=MohammadReza%20Khoshchehre"> MohammadReza Khoshchehre</a>, <a href="https://publications.waset.org/abstracts/search?q=Pejman%20Hakemi"> Pejman Hakemi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study involves numerical simulations of a vertical plate-type photo-bioreactor to investigate the performance of Microalgae Spirulina and Control and optimization of parameters for the digital controller by Taguchi method that MATLAB software and Qualitek-4 has been made. Since the addition of parameters such as temperature, dissolved carbon dioxide, biomass, and ... Some new physical parameters such as light intensity and physiological conditions like photosynthetic efficiency and light inhibitors are involved in biological processes, control is facing many challenges. Not only facilitate the commercial production photo-bioreactor Microalgae as feed for aquaculture and food supplements are efficient systems but also as a possible platform for the production of active molecules such as antibiotics or innovative anti-tumor agents, carbon dioxide removal and removal of heavy metals from wastewater is used. Digital controller is designed for controlling the light bioreactor until Microalgae growth rate and carbon dioxide concentration inside the bioreactor is investigated. The optimal values of the controller parameters of the S/N and ANOVA analysis software Qualitek-4 obtained With Reaction curve, Cohen-Con and Ziegler-Nichols method were compared. The sum of the squared error obtained for each of the control methods mentioned, the Taguchi method as the best method for controlling the light intensity was selected photo-bioreactor. This method compared to control methods listed the higher stability and a shorter interval to be answered. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=photo-bioreactor" title="photo-bioreactor">photo-bioreactor</a>, <a href="https://publications.waset.org/abstracts/search?q=control%20and%20optimization" title=" control and optimization"> control and optimization</a>, <a href="https://publications.waset.org/abstracts/search?q=Light%20intensity" title=" Light intensity"> Light intensity</a>, <a href="https://publications.waset.org/abstracts/search?q=Taguchi%20method" title=" Taguchi method"> Taguchi method</a> </p> <a href="https://publications.waset.org/abstracts/13380/simulation-and-controller-tunning-in-a-photo-bioreactor-applying-by-taguchi-method" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/13380.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">391</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">207</span> Nutrients Removal Control via an Intermittently Aerated Membrane Bioreactor</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Junior%20B.%20N.%20Adohinzin">Junior B. N. Adohinzin</a>, <a href="https://publications.waset.org/abstracts/search?q=Ling%20Xu"> Ling Xu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Nitrogen is among the main nutrients encouraging the growth of organic matter and algae which cause eutrophication in water bodies. Therefore, its removal from wastewater has become a worldwide emerging concern. In this research, an innovative Membrane Bioreactor (MBR) system named “moving bed membrane bioreactor (MBMBR)” was developed and investigated under intermittently-aerated mode for simultaneous removal of organic carbon and nitrogen. Results indicated that the variation of the intermittently aerated duration did not have an apparent impact on COD and NH4+–N removal rate, yielding the effluent with average COD and NH4+–N removal efficiency of more than 92 and 91% respectively. However, in the intermittently aerated cycle of (continuously aeration/0s mix), (aeration 90s/mix 90s) and (aeration 90s/mix 180s); the average TN removal efficiency was 67.6%, 69.5% and 87.8% respectively. At the same time, their nitrite accumulation rate was 4.5%, 49.1% and 79.4% respectively. These results indicate that the intermittently aerated mode is an efficient way to controlling the nitrification to stop at nitrition; and also the length of anoxic duration is a key factor in improving TN removal. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=membrane%20bioreactor%20%28MBR%29" title="membrane bioreactor (MBR)">membrane bioreactor (MBR)</a>, <a href="https://publications.waset.org/abstracts/search?q=moving%20bed%20biofilm%20reactor%20%28MBBR%29" title=" moving bed biofilm reactor (MBBR)"> moving bed biofilm reactor (MBBR)</a>, <a href="https://publications.waset.org/abstracts/search?q=nutrients%20removal" title=" nutrients removal"> nutrients removal</a>, <a href="https://publications.waset.org/abstracts/search?q=simultaneous%20nitrification%20and%20denitrification" title=" simultaneous nitrification and denitrification"> simultaneous nitrification and denitrification</a> </p> <a href="https://publications.waset.org/abstracts/10455/nutrients-removal-control-via-an-intermittently-aerated-membrane-bioreactor" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/10455.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">347</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">206</span> Fed-Batch Mixotrophic Cultivation of Microalgae Scenedesmus sp., Using Airlift Photobioreactor</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Lakshmidevi%20Rajendran">Lakshmidevi Rajendran</a>, <a href="https://publications.waset.org/abstracts/search?q=Bharathidasan%20Kanniappan"> Bharathidasan Kanniappan</a>, <a href="https://publications.waset.org/abstracts/search?q=Gopi%20Raja"> Gopi Raja</a>, <a href="https://publications.waset.org/abstracts/search?q=Muthukumar%20Karuppan"> Muthukumar Karuppan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study investigates the feasibility of fed-batch mixotrophic cultivation of microalgae Scenedesmus sp. in a 3-litre airlift photobioreactor under standard operating conditions. The results of this study suggest the algae species may serve as an excellent feed for aquatic species using organic byproducts. Microalgae Scenedesmus sp., was cultured using a synthetic wastewater by stepwise addition of crude glycerol concentration ranging from 2-10g/l under fed-batch mixotrophic mode for a period of 15 days. The attempts were made with the stepwise addition of crude glycerol as a carbon source in the initial growth phase to evade the inhibitory nature of high glycerol concentration on the growth of Scenedesmus sp. Crude glycerol was chosen since it is readily accessible as byproduct from biodiesel production sectors. Highest biomass concentration was achieved to be 2.43 g/l at the crude glycerol concentration of 6g/l after 10 days which is 3 fold times the increase in the biomass concentration compared with the control medium without the addition of glycerol. Biomass growth data obtained for the microalgae Scenedesmus sp. was fitted well with the modified Logistic equation. Substrate utilization kinetics was also employed to model the biomass productivity with respect to the various crude glycerol concentration. The results indicated that the supplement of crude glycerol to the mixotrophic culture of Scenedesmus sp., enhances the biomass concentration, chlorophyll and lutein productivity. Thus the application of fed-batch mixotrophic cultivation with stepwise addition of crude glycerol to Scenedesmus sp., provides a subtle way to reduce the production cost and improvisation in the large-scale cultivation along with biochemical compound synthesis. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=airlift%20photobioreactor" title="airlift photobioreactor">airlift photobioreactor</a>, <a href="https://publications.waset.org/abstracts/search?q=crude%20glycerol" title=" crude glycerol"> crude glycerol</a>, <a href="https://publications.waset.org/abstracts/search?q=microalgae%20Scenedesmus%20sp." title=" microalgae Scenedesmus sp."> microalgae Scenedesmus sp.</a>, <a href="https://publications.waset.org/abstracts/search?q=mixotrophic%20cultivation" title=" mixotrophic cultivation"> mixotrophic cultivation</a>, <a href="https://publications.waset.org/abstracts/search?q=lutein%20production" title=" lutein production"> lutein production</a> </p> <a href="https://publications.waset.org/abstracts/85027/fed-batch-mixotrophic-cultivation-of-microalgae-scenedesmus-sp-using-airlift-photobioreactor" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/85027.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">187</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">205</span> Performance of an Anaerobic Osmotic Membrane Bioreactor Hybrid System for Wastewater Treatment and Phosphorus Recovery</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ming-Yeh%20Lu">Ming-Yeh Lu</a>, <a href="https://publications.waset.org/abstracts/search?q=Shiao-Shing%20Chen"> Shiao-Shing Chen</a>, <a href="https://publications.waset.org/abstracts/search?q=Saikat%20Sinha%20Ray"> Saikat Sinha Ray</a>, <a href="https://publications.waset.org/abstracts/search?q=Hung-Te%20Hsu"> Hung-Te Hsu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The submerged anaerobic osmotic membrane bioreactor (AnOMBR) integrated with periodic microfiltration (MF) extraction for simultaneous phosphorus and clean water recovery from wastewater was evaluated. A laboratory-scale AnOMBR used cellulose triacetate (CTA) membranes with effective membrane area of 130 cm² was fully submerged into a 5 L bioreactor at 30-35 ℃. Active layer was orientated to feed stream for minimizing membrane fouling and scaling. Additionally, a peristaltic pump was used to circulate magnesium sulphate (MgSO₄) solution applied as draw solution (DS). Microfiltration membrane periodically extracted about 1 L solution when the TDS reaches to 5 g/L to recover phosphorus and simultaneously control the salt accumulation in the bioreactor. During experiment progress, the average water flux was around 1.6 LMH. The AnOMBR process showed greater than 95% removal of soluble chemical oxygen demand (sCOD), nearly 100% of total phosphorous whereas only partial of ammonia was removed. On the other hand, the average methane production of 0.22 L/g sCOD was obtained. Subsequently, the overall performance demonstrates that a novel submerged AnOMBR system is potential for simultaneous wastewater treatment and resource recovery from wastewater. Therefore, the new concept of this system can be used to replace for the conventional AnMBR in the future. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=anaerobic%20treatment" title="anaerobic treatment">anaerobic treatment</a>, <a href="https://publications.waset.org/abstracts/search?q=forward%20osmosis" title=" forward osmosis"> forward osmosis</a>, <a href="https://publications.waset.org/abstracts/search?q=phosphorus%20recovery" title=" phosphorus recovery"> phosphorus recovery</a>, <a href="https://publications.waset.org/abstracts/search?q=membrane%20bioreactor" title=" membrane bioreactor"> membrane bioreactor</a> </p> <a href="https://publications.waset.org/abstracts/63831/performance-of-an-anaerobic-osmotic-membrane-bioreactor-hybrid-system-for-wastewater-treatment-and-phosphorus-recovery" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/63831.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">235</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">204</span> Membrane Bioreactor versus Activated Sludge Process for Aerobic Wastewater Treatment and Recycling</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sarra%20Kitanou">Sarra Kitanou</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Membrane bioreactor (MBR) systems are one of the most widely used wastewater treatment processes for various municipal and industrial waste streams. It is based on complex interactions between biological processes, filtration process and rheological properties of the liquid to be treated. Its complexity makes understanding system operation and optimization more difficult, and traditional methods based on experimental analysis are costly and time consuming. The present study was based on an external membrane bioreactor pilot scale with ceramic membranes compared to conventional activated sludge process (ASP) plant. Both systems received their influent from a domestic wastewater. The membrane bioreactor (MBR) produced an effluent with much better quality than ASP in terms of total suspended solids (TSS), organic matter such as biological oxygen demand (BOD) and chemical oxygen demand (COD), total Phosphorus and total Nitrogen. Other effluent quality parameters also indicate substantial differences between ASP and MBR. This study leads to conclude that in the case domestic wastewater, MBR treatment has excellent effluent quality. Hence, the replacement of the ASP by the MBRs may be justified on the basis of their improved removal of solids, nutrients, and micropollutants. Furthermore, in terms of reuse the great quality of the treated water allows it to be reused for irrigation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=aerobic%20wastewater%20treatment" title="aerobic wastewater treatment">aerobic wastewater treatment</a>, <a href="https://publications.waset.org/abstracts/search?q=conventional%20activated%20sludge%20process" title=" conventional activated sludge process"> conventional activated sludge process</a>, <a href="https://publications.waset.org/abstracts/search?q=membrane%20bioreactor" title=" membrane bioreactor"> membrane bioreactor</a>, <a href="https://publications.waset.org/abstracts/search?q=reuse%20for%20irrigation" title=" reuse for irrigation"> reuse for irrigation</a> </p> <a href="https://publications.waset.org/abstracts/167997/membrane-bioreactor-versus-activated-sludge-process-for-aerobic-wastewater-treatment-and-recycling" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/167997.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">78</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">203</span> Thermophilic Anaerobic Granular Membrane Distillation Bioreactor for Wastewater Reuse</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Duong%20Cong%20Chinh">Duong Cong Chinh</a>, <a href="https://publications.waset.org/abstracts/search?q=Shiao-Shing%20Chen"> Shiao-Shing Chen</a>, <a href="https://publications.waset.org/abstracts/search?q=Le%20Quang%20Huy"> Le Quang Huy</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Membrane distillation (MD) is actually claimed to be a cost-effective separation process when waste heat, alternative energy sources, or wastewater are used. To the best of our knowledge, this is the ﬁrst study that a thermophilic anaerobic granular bioreactor is integrated with membrane distillation (ThAnMDB) was investigated. In this study, the laboratory scale anaerobic bioreactor (1.2 litter) was set-up. The bioreactor was maintained at temperature 55 ± 2°C, hydraulic retention time = 0.5 days, organic loading rates of 7 and 10 kg chemical oxygen demand (COD) m³/day. Side-stream direct contact membrane distillation with the polytetrafluoroethylene membrane area was 150 cm². The temperature of the distillate was kept at 25°C. Results show that distillate flux was 19.6 LMH (Liters per square meter per hour) on the first day and gradually decreased to 6.9 LMH after 10 days, and the membrane was not wet. Notably, by directly using the heat from the thermophilic anaerobic for MD separation process, all distilled water from wastewater was reuse as fresh water (electrical conductivity < 120 µs/cm). The ThAnMDB system showed its high pollutant removal performance: chemical oxygen demand (COD) from 99.6 to 99.9%, NH₄⁺ from 60 to 95%, and PO₄³⁻ complete removal. In addition, methane yield was from 0.28 to 0.34 lit CH₄/gram COD removal (80 – 97% of the theoretical) demonstrated that the ThAnMDB system was quite stable. The achievement of the ThAnMDB is not only in removing pollutants and reusing wastewater but also in absolutely unnecessarily adding alkaline to the anaerobic bioreactor system. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=high%20rate%20anaerobic%20digestion" title="high rate anaerobic digestion">high rate anaerobic digestion</a>, <a href="https://publications.waset.org/abstracts/search?q=membrane%20distillation" title=" membrane distillation"> membrane distillation</a>, <a href="https://publications.waset.org/abstracts/search?q=thermophilic%20anaerobic" title=" thermophilic anaerobic"> thermophilic anaerobic</a>, <a href="https://publications.waset.org/abstracts/search?q=wastewater%20reuse" title=" wastewater reuse"> wastewater reuse</a> </p> <a href="https://publications.waset.org/abstracts/110378/thermophilic-anaerobic-granular-membrane-distillation-bioreactor-for-wastewater-reuse" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/110378.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">127</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">202</span> Efficiency of Modified Granular Activated Carbon Coupled with Membrane Bioreactor for Trace Organic Contaminants Removal</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mousaab%20Alrhmoun">Mousaab Alrhmoun</a>, <a href="https://publications.waset.org/abstracts/search?q=Magali%20Casellas"> Magali Casellas</a>, <a href="https://publications.waset.org/abstracts/search?q=Michel%20Baudu"> Michel Baudu</a>, <a href="https://publications.waset.org/abstracts/search?q=Christophe%20Dagot"> Christophe Dagot </a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of the study is to improve removal of trace organic contaminants dissolved in activated sludge by the process of filtration with membrane bioreactor combined with modified activated carbon, for a maximum removal of organic compounds characterized by low molecular weight. Special treatment was conducted in laboratory on activated carbon. Tow reaction parameters: The pH of aqueous middle and the type of granular activated carbon were very important to improve the removal and to motivate the electrostatic Interactions of organic compounds with modified activated carbon in addition to physical adsorption, ligand exchange or complexation on the surface activated carbon. The results indicate that modified activated carbon has a strong impact in removal 21 of organic contaminants and in percentage of 100% of the process. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=activated%20carbon" title="activated carbon">activated carbon</a>, <a href="https://publications.waset.org/abstracts/search?q=organic%20micropolluants" title=" organic micropolluants"> organic micropolluants</a>, <a href="https://publications.waset.org/abstracts/search?q=membrane%20bioreactor" title=" membrane bioreactor"> membrane bioreactor</a>, <a href="https://publications.waset.org/abstracts/search?q=carbon" title=" carbon"> carbon</a> </p> <a href="https://publications.waset.org/abstracts/3910/efficiency-of-modified-granular-activated-carbon-coupled-with-membrane-bioreactor-for-trace-organic-contaminants-removal" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/3910.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">323</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">201</span> Wave Powered Airlift PUMP for Primarily Artificial Upwelling</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bruno%20Cossu">Bruno Cossu</a>, <a href="https://publications.waset.org/abstracts/search?q=Elio%20Carlo"> Elio Carlo</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The invention (patent pending) relates to the field of devices aimed to harness wave energy (WEC) especially for artificial upwelling, forced downwelling, production of compressed air. In its basic form, the pump consists of a hydro-pneumatic machine, driven by wave energy, characterised by the fact that it has no moving mechanical parts, and is made up of only two structural components: an hollow body, which is open at the bottom to the sea and partially immersed in sea water, and a tube, both joined together to form a single body. The shape of the hollow body is like a mushroom whose cap and stem are hollow; the stem is open at both ends and the lower part of its surface is crossed by holes; the tube is external and coaxial to the stem and is joined to it so as to form a single body. This shape of the hollow body and the type of connection to the tube allows the pump to operate simultaneously as an air compressor (OWC) on the cap side, and as an airlift on the stem side. The pump can be implemented in four versions, each of which provides different variants and methods of implementation: 1) firstly, for the artificial upwelling of cold, deep ocean water; 2) secondly, for the lifting and transfer of these waters to the place of use (above all, fish farming plants), even if kilometres away; 3) thirdly, for the forced downwelling of surface sea water; 4) fourthly, for the forced downwelling of surface water, its oxygenation, and the simultaneous production of compressed air. The transfer of the deep water or the downwelling of the raised surface water (as for pump versions indicated in points 2 and 3 above), is obtained by making the water raised by the airlift flow into the upper inlet of another pipe, internal or adjoined to the airlift; the downwelling of raised surface water, oxygenation, and the simultaneous production of compressed air (as for the pump version indicated in point 4), is obtained by installing a venturi tube on the upper end of the pipe, whose restricted section is connected to the external atmosphere, so that it also operates like a hydraulic air compressor (trompe). Furthermore, by combining one or more pumps for the upwelling of cold, deep water, with one or more pumps for the downwelling of the warm surface water, the system can be used in an Ocean Thermal Energy Conversion plant to supply the cold and the warm water required for the operation of the same, thus allowing to use, without increased costs, in addition to the mechanical energy of the waves, for the purposes indicated in points 1 to 4, the thermal one of the marine water treated in the process. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=air%20lifted%20upwelling" title="air lifted upwelling">air lifted upwelling</a>, <a href="https://publications.waset.org/abstracts/search?q=fish%20farming%20plant" title=" fish farming plant"> fish farming plant</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20air%20compressor" title=" hydraulic air compressor"> hydraulic air compressor</a>, <a href="https://publications.waset.org/abstracts/search?q=wave%20energy%20converter" title=" wave energy converter"> wave energy converter</a> </p> <a href="https://publications.waset.org/abstracts/88796/wave-powered-airlift-pump-for-primarily-artificial-upwelling" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/88796.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">148</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">200</span> Prediction of Product Size Distribution of a Vertical Stirred Mill Based on Breakage Kinetics</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=C.%20R.%20Danielle">C. R. Danielle</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Erik"> S. Erik</a>, <a href="https://publications.waset.org/abstracts/search?q=T.%20Patrick"> T. Patrick</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Hugh"> M. Hugh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the last decade there has been an increase in demand for fine grinding due to the depletion of coarse-grained orebodies and an increase of processing fine disseminated minerals and complex orebodies. These ores have provided new challenges in concentrator design because fine and ultra-fine grinding is required to achieve acceptable recovery rates. Therefore, the correct design of a grinding circuit is important for minimizing unit costs and increasing product quality. The use of ball mills for grinding in fine size ranges is inefficient and, therefore, vertical stirred grinding mills are becoming increasingly popular in the mineral processing industry due to its already known high energy efficiency. This work presents a hypothesis of a methodology to predict the product size distribution of a vertical stirred mill using a Bond ball mill. The Population Balance Model (PBM) was used to empirically analyze the performance of a vertical mill and a Bond ball mill. The breakage parameters obtained for both grinding mills are compared to determine the possibility of predicting the product size distribution of a vertical mill based on the results obtained from the Bond ball mill. The biggest advantage of this methodology is that most of the minerals processing laboratories already have a Bond ball mill to perform the tests suggested in this study. Preliminary results show the possibility of predicting the performance of a laboratory vertical stirred mill using a Bond ball mill. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bond%20ball%20mill" title="bond ball mill">bond ball mill</a>, <a href="https://publications.waset.org/abstracts/search?q=population%20balance%20model" title=" population balance model"> population balance model</a>, <a href="https://publications.waset.org/abstracts/search?q=product%20size%20distribution" title=" product size distribution"> product size distribution</a>, <a href="https://publications.waset.org/abstracts/search?q=vertical%20stirred%20mill" title=" vertical stirred mill"> vertical stirred mill</a> </p> <a href="https://publications.waset.org/abstracts/62771/prediction-of-product-size-distribution-of-a-vertical-stirred-mill-based-on-breakage-kinetics" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/62771.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">291</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">199</span> Effect of Ultrasound on the Hydrolysis of Soy Oil Catalyzed by 1,3-Specific Lipase Abstract </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jamal%20Abd%20Awadallak">Jamal Abd Awadallak</a>, <a href="https://publications.waset.org/abstracts/search?q=Thiago%20Olinek%20Reinehr"> Thiago Olinek Reinehr</a>, <a href="https://publications.waset.org/abstracts/search?q=Eduardo%20Raizer"> Eduardo Raizer</a>, <a href="https://publications.waset.org/abstracts/search?q=Deise%20Molinari"> Deise Molinari</a>, <a href="https://publications.waset.org/abstracts/search?q=Edson%20Antonio"> Edson Antonio</a>, <a href="https://publications.waset.org/abstracts/search?q=Camila%20da%20Silva%20da%20Silva"> Camila da Silva da Silva</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The hydrolysis of soy oil catalyzed by 1,3-specific enzyme (Lecitase Ultra) in a well-stirred bioreactor was studied. Two forms of applications of the ultrasound were evaluated aiming to increase reaction rates, wherein the use of probe ultrasound associated with the use of surfactant to pre-emulsify the substrate showed the best results. Two different reaction periods were found: the first where the ultrasound has great influence on reaction rates, and the second where ultrasound influence is minimal. Studies on the time of pre-emulsification, surfactant concentration and enzyme concentration showed that the initial rate of hydrolysis depends on the interfacial area between the oil phase and the aqueous phase containing the enzyme. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=specific%20enzyme" title="specific enzyme">specific enzyme</a>, <a href="https://publications.waset.org/abstracts/search?q=free%20fatty%20acids" title=" free fatty acids"> free fatty acids</a>, <a href="https://publications.waset.org/abstracts/search?q=Hydrolysis" title=" Hydrolysis"> Hydrolysis</a>, <a href="https://publications.waset.org/abstracts/search?q=lecitase%20ultra" title=" lecitase ultra"> lecitase ultra</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasound" title=" ultrasound"> ultrasound</a> </p> <a href="https://publications.waset.org/abstracts/20337/effect-of-ultrasound-on-the-hydrolysis-of-soy-oil-catalyzed-by-13-specific-lipase-abstract" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/20337.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">578</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">198</span> Optimization of a Bioremediation Strategy for an Urban Stream of Matanza-Riachuelo Basin</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mar%C3%ADa%20D.%20Groppa">María D. Groppa</a>, <a href="https://publications.waset.org/abstracts/search?q=Andrea%20Trentini"> Andrea Trentini</a>, <a href="https://publications.waset.org/abstracts/search?q=Myriam%20Zawoznik"> Myriam Zawoznik</a>, <a href="https://publications.waset.org/abstracts/search?q=Roxana%20Bigi"> Roxana Bigi</a>, <a href="https://publications.waset.org/abstracts/search?q=Carlos%20Nadra"> Carlos Nadra</a>, <a href="https://publications.waset.org/abstracts/search?q=Patricia%20L.%20Marconi"> Patricia L. Marconi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the present work, a remediation bioprocess based on the use of a local isolate of the microalgae <em>Chlorella vulgaris</em> immobilized in alginate beads is proposed. This process was shown to be effective for the reduction of several chemical and microbial contaminants present in Cildáñez stream, a water course that is part of the Matanza-Riachuelo Basin (Buenos Aires, Argentina). The bioprocess, involving the culture of the microalga in autotrophic conditions in a stirred-tank bioreactor supplied with a marine propeller for 6 days, allowed a significant reduction of <em>Escherichia coli</em> and total coliform numbers (over 95%), as well as of ammoniacal nitrogen (96%), nitrates (86%), nitrites (98%), and total phosphorus (53%) contents. Pb content was also significantly diminished after the bioprocess (95%). Standardized cytotoxicity tests using<em> Allium cepa</em> seeds and Cildáñez water pre- and post-remediation were also performed. Germination rate and mitotic index of onion seeds imbibed in Cildáñez water subjected to the bioprocess was similar to that observed in seeds imbibed in distilled water and significantly superior to that registered when untreated Cildáñez water was used for imbibition. Our results demonstrate the potential of this simple and cost-effective technology to remove urban-water contaminants, offering as an additional advantage the possibility of an easy biomass recovery, which may become a source of alternative energy. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bioreactor" title="bioreactor">bioreactor</a>, <a href="https://publications.waset.org/abstracts/search?q=bioremediation" title=" bioremediation"> bioremediation</a>, <a href="https://publications.waset.org/abstracts/search?q=Chlorella%20vulgaris" title=" Chlorella vulgaris"> Chlorella vulgaris</a>, <a href="https://publications.waset.org/abstracts/search?q=Matanza-Riachuelo%20Basin" title=" Matanza-Riachuelo Basin"> Matanza-Riachuelo Basin</a>, <a href="https://publications.waset.org/abstracts/search?q=microalgae" title=" microalgae"> microalgae</a> </p> <a href="https://publications.waset.org/abstracts/105372/optimization-of-a-bioremediation-strategy-for-an-urban-stream-of-matanza-riachuelo-basin" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/105372.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">250</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">197</span> Modeling Approach to Better Control Fouling in a Submerged Membrane Bioreactor for Wastewater Treatment: Development of Analytical Expressions in Steady-State Using ASM1</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Benaliouche%20Hana">Benaliouche Hana</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdessemed%20Djamal"> Abdessemed Djamal</a>, <a href="https://publications.waset.org/abstracts/search?q=Meniai%20Abdessalem"> Meniai Abdessalem</a>, <a href="https://publications.waset.org/abstracts/search?q=Lesage%20Geoffroy"> Lesage Geoffroy</a>, <a href="https://publications.waset.org/abstracts/search?q=Heran%20Marc"> Heran Marc</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents a dynamic mathematical model of activated sludge which is able to predict the formation and degradation kinetics of SMP (Soluble microbial products) in membrane bioreactor systems. The model is based on a calibrated version of ASM1 with the theory of production and degradation of SMP. The model was calibrated on the experimental data from MBR (Mathematical modeling Membrane bioreactor) pilot plant. Analytical expressions have been developed, describing the concentrations of the main state variables present in the sludge matrix, with the inclusion of only six additional linear differential equations. The objective is to present a new dynamic mathematical model of activated sludge capable of predicting the formation and degradation kinetics of SMP (UAP and BAP) from the submerged membrane bioreactor (BRMI), operating at low organic load (C / N = 3.5), for two sludge retention times (SRT) fixed at 40 days and 60 days, to study their impact on membrane fouling, The modeling study was carried out under the steady-state condition. Analytical expressions were then validated by comparing their results with those obtained by simulations using GPS-X-Hydromantis software. These equations made it possible, by means of modeling approaches (ASM1), to identify the operating and kinetic parameters and help to predict membrane fouling. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Activated%20Sludge%20Model%20No.%201%20%28ASM1%29" title="Activated Sludge Model No. 1 (ASM1)">Activated Sludge Model No. 1 (ASM1)</a>, <a href="https://publications.waset.org/abstracts/search?q=mathematical%20modeling%20membrane%20bioreactor" title=" mathematical modeling membrane bioreactor"> mathematical modeling membrane bioreactor</a>, <a href="https://publications.waset.org/abstracts/search?q=soluble%20microbial%20products" title=" soluble microbial products"> soluble microbial products</a>, <a href="https://publications.waset.org/abstracts/search?q=UAP" title=" UAP"> UAP</a>, <a href="https://publications.waset.org/abstracts/search?q=BAP" title=" BAP"> BAP</a>, <a href="https://publications.waset.org/abstracts/search?q=Modeling%20SMP" title=" Modeling SMP"> Modeling SMP</a>, <a href="https://publications.waset.org/abstracts/search?q=MBR" title=" MBR"> MBR</a>, <a href="https://publications.waset.org/abstracts/search?q=heterotrophic%20biomass" title=" heterotrophic biomass"> heterotrophic biomass</a> </p> <a href="https://publications.waset.org/abstracts/139601/modeling-approach-to-better-control-fouling-in-a-submerged-membrane-bioreactor-for-wastewater-treatment-development-of-analytical-expressions-in-steady-state-using-asm1" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/139601.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">294</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">196</span> Removal of Trimethoprim and Sulfamethoxazole in Solid Waste Leachate by Two-Stage Membrane Bioreactor under High Mixed Liquor Suspended Solids Concentration</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nilubon%20Thongtan">Nilubon Thongtan</a>, <a href="https://publications.waset.org/abstracts/search?q=Wilai%20Chiemchaisri"> Wilai Chiemchaisri</a>, <a href="https://publications.waset.org/abstracts/search?q=Chart%20Chiemchaisri"> Chart Chiemchaisri</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Purpose of study is to investigate performance of two-stage membrane bioreactor (2S-MBR) to treat trimethoprim and sulfamethoxazole in solid waste leachate. This system consists of 2 tanks, anoxic tank with incline plates and MBR tank. The system was operated at 12 h-HRT each, of which the MBR MLSS concentration was operated at 25,000-35,000 mg/L. The average sCOD concentration of the fed leachate was 6,310±3,595 mg/L. It shows that high organic removals in terms of sCOD and sBOD were achieved as of 97-99% and 99%, respectively. The TKN and NH3-N removals were 76-98% and 91-99%, respectively. Concurrently, trimethoprim and sulfamethoxazole were detected in the leachate with concentrations of 113-0 μg/L and 74-2 μg/L, respectively. High removals of trimethoprim and sulfamethoxazole were also found as of 95-99% and 85-95%, respectively. In sum, this MBR feature and operation gave achievement in treatment of macro-pollutants including trimethoprim and sulfamethoxazole existing in low levels in the solid waste leachate. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=membrane%20bioreactor" title="membrane bioreactor">membrane bioreactor</a>, <a href="https://publications.waset.org/abstracts/search?q=solid%20waste%20leachate" title=" solid waste leachate"> solid waste leachate</a>, <a href="https://publications.waset.org/abstracts/search?q=sulfamethoxazole" title=" sulfamethoxazole"> sulfamethoxazole</a>, <a href="https://publications.waset.org/abstracts/search?q=trimethoprim" title=" trimethoprim"> trimethoprim</a> </p> <a href="https://publications.waset.org/abstracts/91047/removal-of-trimethoprim-and-sulfamethoxazole-in-solid-waste-leachate-by-two-stage-membrane-bioreactor-under-high-mixed-liquor-suspended-solids-concentration" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/91047.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">146</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">195</span> Experimental Research of Biogas Production by Using Sewage Sludge and Chicken Manure Bioloadings with Wood Biochar Additive</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=P.%20Baltrenas">P. Baltrenas</a>, <a href="https://publications.waset.org/abstracts/search?q=D.%20Paliulis"> D. Paliulis</a>, <a href="https://publications.waset.org/abstracts/search?q=V.%20Kolodynskij"> V. Kolodynskij</a>, <a href="https://publications.waset.org/abstracts/search?q=D.%20Urbanas"> D. Urbanas</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Bioreactor; special device, which is used for biogas production from various organic material under anaerobic conditions. In this research, a batch bioreactor with a mechanical mixer was used for biogas production from sewage sludge and chicken manure bioloadings. The process of anaerobic digestion was mesophilic (35 °C). Produced biogas was stoted in a gasholder and the concentration of its components was measured with INCA 4000 biogas analyser. Also, a specific additive (pine wood biochar) was applied to prepare bioloadings. The application of wood biochar in bioloading increases the CH₄ concentration in the produced gas by 6-7%. The highest concentrations of CH₄ were found in biogas produced during the decomposition of sewage sludge bioloadings. The maximum CH₄ reached 77.4%. Studies have shown that the application of biochar in bioloadings also reduces average CO₂ and H₂S concentrations in biogas. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=biochar" title="biochar">biochar</a>, <a href="https://publications.waset.org/abstracts/search?q=biogas" title=" biogas"> biogas</a>, <a href="https://publications.waset.org/abstracts/search?q=bioreactor" title=" bioreactor"> bioreactor</a>, <a href="https://publications.waset.org/abstracts/search?q=sewage%20sludge" title=" sewage sludge"> sewage sludge</a> </p> <a href="https://publications.waset.org/abstracts/101582/experimental-research-of-biogas-production-by-using-sewage-sludge-and-chicken-manure-bioloadings-with-wood-biochar-additive" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/101582.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">169</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">194</span> Mitigating Food Insecurity and Malnutrition by Promoting Carbon Farming via a Solar-Powered Enzymatic Composting Bioreactor with Arduino-Based Sensors</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Molin%20A.">Molin A.</a>, <a href="https://publications.waset.org/abstracts/search?q=De%20Ramos%20J.%20M."> De Ramos J. M.</a>, <a href="https://publications.waset.org/abstracts/search?q=Cadion%20L.%20G."> Cadion L. G.</a>, <a href="https://publications.waset.org/abstracts/search?q=Pico%20R.%20L."> Pico R. L.</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Malnutrition and food insecurity represent significant global challenges affecting millions of individuals, particularly in low-income and developing regions. The researchers created a solar-powered enzymatic composting bioreactor with an Arduino-based monitoring system for pH, humidity, and temperature. It manages mixed municipal solid wastes incorporating industrial enzymes and whey additives for accelerated composting and minimized carbon footprint. Within 15 days, the bioreactor yielded 54.54% compost compared to 44.85% from traditional methods, increasing yield by nearly 10%. Tests showed that the bioreactor compost had 4.84% NPK, passing metal analysis standards, while the traditional pit compost had 3.86% NPK; both are suitable for agriculture. Statistical analyses, including ANOVA and Tukey's HSD test, revealed significant differences in agricultural yield across different compost types based on leaf length, width, and number of leaves. The study compared the effects of different composts on Brassica rapa subsp. Chinesis (Petchay) and Brassica juncea (Mustasa) plant growth. For Pechay, significant effects of compost type on plant leaf length (F(5,84) = 62.33, η² = 0.79) and leaf width (F(5,84) = 12.35, η² = 0.42) were found. For Mustasa, significant effects of compost type on leaf length (F(4,70) = 20.61, η² = 0.54), leaf width (F(4,70) = 19.24, η² = 0.52), and number of leaves (F(4,70) = 13.17, η² = 0.43) were observed. This study explores the effectiveness of the enzymatic composting bioreactor and its viability in promoting carbon farming as a solution to food insecurity and malnutrition. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=malnutrition" title="malnutrition">malnutrition</a>, <a href="https://publications.waset.org/abstracts/search?q=food%20insecurity" title=" food insecurity"> food insecurity</a>, <a href="https://publications.waset.org/abstracts/search?q=enzymatic%20composting%20bioreactor" title=" enzymatic composting bioreactor"> enzymatic composting bioreactor</a>, <a href="https://publications.waset.org/abstracts/search?q=arduino-based%20monitoring%20system" title=" arduino-based monitoring system"> arduino-based monitoring system</a>, <a href="https://publications.waset.org/abstracts/search?q=enzymes" title=" enzymes"> enzymes</a>, <a href="https://publications.waset.org/abstracts/search?q=carbon%20farming" title=" carbon farming"> carbon farming</a>, <a href="https://publications.waset.org/abstracts/search?q=whey%20additive" title=" whey additive"> whey additive</a>, <a href="https://publications.waset.org/abstracts/search?q=NPK%20level" title=" NPK level"> NPK level</a> </p> <a href="https://publications.waset.org/abstracts/185261/mitigating-food-insecurity-and-malnutrition-by-promoting-carbon-farming-via-a-solar-powered-enzymatic-composting-bioreactor-with-arduino-based-sensors" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/185261.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">58</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">193</span> The Use of a Miniature Bioreactor as Research Tool for Biotechnology Process Development</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Muhammad%20Zainuddin%20Arriafdi">Muhammad Zainuddin Arriafdi</a>, <a href="https://publications.waset.org/abstracts/search?q=Hamudah%20Hakimah%20Abdullah"> Hamudah Hakimah Abdullah</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohd%20Helmi%20Sani"> Mohd Helmi Sani</a>, <a href="https://publications.waset.org/abstracts/search?q=Wan%20Azlina%20Ahmad"> Wan Azlina Ahmad</a>, <a href="https://publications.waset.org/abstracts/search?q=Muhd%20Nazrul%20Hisham%20Zainal%20Alam"> Muhd Nazrul Hisham Zainal Alam</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The biotechnology process development demands numerous experimental works. In laboratory environment, this is typically carried out using a shake flask platform. This paper presents the design and fabrication of a miniature bioreactor system as an alternative research tool for bioprocessing. The working volume of the reactor is 100 ml, and it is made of plastic. The main features of the reactor included stirring control, temperature control via the electrical heater, aeration strategy through a miniature air compressor, and online optical cell density (OD) sensing. All sensors and actuators integrated into the reactor was controlled using an Arduino microcontroller platform. In order to demonstrate the functionality of such miniature bioreactor concept, series of batch Saccharomyces cerevisiae fermentation experiments were performed under various glucose concentrations. Results attained from the fermentation experiments were utilized to solve the Monod equation constants, namely the saturation constant, Ks, and cells maximum growth rate, μmax as to further highlight the usefulness of the device. The mixing capacity of the reactor was also evaluated. It was found that the results attained from the miniature bioreactor prototype were comparable to results achieved using a shake flask. The unique features of the device as compared to shake flask platform is that the reactor mixing condition is much more comparable to a lab-scale bioreactor setup. The prototype is also integrated with an online OD sensor, and as such, no sampling was needed to monitor the progress of the reaction performed. Operating cost and medium consumption are also low and thus, making it much more economical to be utilized for biotechnology process development compared to lab-scale bioreactors. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=biotechnology" title="biotechnology">biotechnology</a>, <a href="https://publications.waset.org/abstracts/search?q=miniature%20bioreactor" title=" miniature bioreactor"> miniature bioreactor</a>, <a href="https://publications.waset.org/abstracts/search?q=research%20tools" title=" research tools"> research tools</a>, <a href="https://publications.waset.org/abstracts/search?q=Saccharomyces%20cerevisiae" title=" Saccharomyces cerevisiae"> Saccharomyces cerevisiae</a> </p> <a href="https://publications.waset.org/abstracts/120070/the-use-of-a-miniature-bioreactor-as-research-tool-for-biotechnology-process-development" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/120070.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">117</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">192</span> Computational Fluid Dynamics and Experimental Evaluation of Two Batch Type Electrocoagulation Stirred Tank Reactors Used in the Removal of Cr (VI) from Waste Water</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Phanindra%20Prasad%20Thummala">Phanindra Prasad Thummala</a>, <a href="https://publications.waset.org/abstracts/search?q=Umran%20Tezcan%20Un"> Umran Tezcan Un</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, hydrodynamics analysis of two batch type electrocoagulation stirred tank reactors, used for the electrocoagulation treatment of Cr(VI) wastewater, was carried using computational fluid dynamics (CFD). The aim of the study was to evaluate the impact of mixing characteristics on overall performance of electrocoagulation reactor. The CFD simulations were performed using ANSYS FLUENT 14.4 software. The mixing performance of each reactor was evaluated by numerically modelling tracer dispersion in each reactor configuration. The uniformity in tracer dispersion was assumed when 90% of the ratio of the maximum to minimum concentration of the tracer was realized. In parallel, experimental evaluation of both the electrocoagulation reactors for removal of Cr(VI) from wastewater was also carried out. The results of CFD and experimental analysis clearly show that the reactor which can give higher uniformity in lesser time, will perform better as an electrocoagulation reactor for removal of Cr(VI) from wastewater. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=CFD" title="CFD">CFD</a>, <a href="https://publications.waset.org/abstracts/search?q=stirred%20tank%20reactors" title=" stirred tank reactors"> stirred tank reactors</a>, <a href="https://publications.waset.org/abstracts/search?q=electrocoagulation" title=" electrocoagulation"> electrocoagulation</a>, <a href="https://publications.waset.org/abstracts/search?q=Cr%28VI%29%20wastewater" title=" Cr(VI) wastewater"> Cr(VI) wastewater</a> </p> <a href="https://publications.waset.org/abstracts/66779/computational-fluid-dynamics-and-experimental-evaluation-of-two-batch-type-electrocoagulation-stirred-tank-reactors-used-in-the-removal-of-cr-vi-from-waste-water" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/66779.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">461</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">191</span> Modeling of Oxygen Supply Profiles in Stirred-Tank Aggregated Stem Cells Cultivation Process</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Vytautas%20Galvanauskas">Vytautas Galvanauskas</a>, <a href="https://publications.waset.org/abstracts/search?q=Vykantas%20Grincas"> Vykantas Grincas</a>, <a href="https://publications.waset.org/abstracts/search?q=Rimvydas%20Simutis"> Rimvydas Simutis</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper investigates a possible practical solution for reasonable oxygen supply during the pluripotent stem cells expansion processes, where the stem cells propagate as aggregates in stirred-suspension bioreactors. Low glucose and low oxygen concentrations are preferred for efficient proliferation of pluripotent stem cells. However, strong oxygen limitation, especially inside of cell aggregates, can lead to cell starvation and death. In this research, the oxygen concentration profile inside of stem cell aggregates in a stem cell expansion process was predicted using a modified oxygen diffusion model. This profile can be realized during the stem cells cultivation process by manipulating the oxygen concentration in inlet gas or inlet gas flow. The proposed approach is relatively simple and may be attractive for installation in a real pluripotent stem cell expansion processes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=aggregated%20stem%20cells" title="aggregated stem cells">aggregated stem cells</a>, <a href="https://publications.waset.org/abstracts/search?q=dissolved%20oxygen%20profiles" title=" dissolved oxygen profiles"> dissolved oxygen profiles</a>, <a href="https://publications.waset.org/abstracts/search?q=modeling" title=" modeling"> modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=stirred-tank" title=" stirred-tank"> stirred-tank</a>, <a href="https://publications.waset.org/abstracts/search?q=3D%20expansion" title=" 3D expansion"> 3D expansion</a> </p> <a href="https://publications.waset.org/abstracts/49847/modeling-of-oxygen-supply-profiles-in-stirred-tank-aggregated-stem-cells-cultivation-process" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/49847.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">304</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">190</span> Effect of Hydraulic Residence Time on Aromatic Petrochemical Wastewater Treatment Using Pilot-Scale Submerged Membrane Bioreactor</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fatemeh%20Yousefi">Fatemeh Yousefi</a>, <a href="https://publications.waset.org/abstracts/search?q=Narges%20Fallah"> Narges Fallah</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohsen%20Kian"> Mohsen Kian</a>, <a href="https://publications.waset.org/abstracts/search?q=Mehrzad%20Pakzadeh"> Mehrzad Pakzadeh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The petrochemical complex releases wastewater, which is rich in organic pollutants and could not be treated easily. Treatment of the wastewater from a petrochemical industry has been investigated using a submerged membrane bioreactor (MBR). For this purpose, a pilot-scale submerged MBR with a flat-sheet ultrafiltration membrane was used for treatment of petrochemical wastewater according to Bandar Imam Petrochemical complex (BIPC) Aromatic plant. The testing system ran continuously (24-h) over 6 months. Trials on different membrane fluxes and hydraulic retention time (HRT) were conducted and the performance evaluation of the system was done. During the 167 days operation of the MBR at hydraulic retention time (HRT) of 18, 12, 6, and 3 and at an infinite sludge retention time (SRT), the MBR effluent quality consistently met the requirement for discharge to the environment. A fluxes of 6.51 and 13.02 L m-2 h-1 (LMH) was sustainable and HRT of 6 and 12 h corresponding to these fluxes were applicable. Membrane permeability could be fully recovered after cleaning. In addition, there was no foaming issue in the process. It was concluded that it was feasible to treat the wastewater using submersed MBR technology. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=membrane%20bioreactor%20%28MBR%29" title="membrane bioreactor (MBR)">membrane bioreactor (MBR)</a>, <a href="https://publications.waset.org/abstracts/search?q=petrochemical%20wastewater" title=" petrochemical wastewater"> petrochemical wastewater</a>, <a href="https://publications.waset.org/abstracts/search?q=COD%20removal" title=" COD removal"> COD removal</a>, <a href="https://publications.waset.org/abstracts/search?q=biological%20treatment" title=" biological treatment"> biological treatment</a> </p> <a href="https://publications.waset.org/abstracts/21056/effect-of-hydraulic-residence-time-on-aromatic-petrochemical-wastewater-treatment-using-pilot-scale-submerged-membrane-bioreactor" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/21056.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">519</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">189</span> Optimization Studies on Biosorption of Ni(II) and Cd(II) from Wastewater Using Pseudomonas putida in a Packed Bed Bioreactor </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=K.Narasimhulu">K.Narasimhulu</a>, <a href="https://publications.waset.org/abstracts/search?q=Y.%20Pydi%20Setty">Y. Pydi Setty</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The objective of this present study is the optimization of process parameters in biosorption of Ni(II) and Cd(II) ions by Pseudomonas putida using Response Surface Methodology in a Packed bed bioreactor. The experimental data were also tested with theoretical models to find the best fit model. The present paper elucidates RSM as an efficient approach for predictive model building and optimization of Ni(II) and Cd(II) ions using Pseudomonas putida. In packed bed biosorption studies, comparison of the breakthrough curves of Ni(II) and Cd(II) for Agar immobilized and PAA immobilized Pseudomonas putida at optimum conditions of flow rate of 300 mL/h, initial metal ion concentration of 100 mg/L and bed height of 20 cm with weight of biosorbent of 12 g, it was found that the Agar immobilized Pseudomonas putida showed maximum percent biosorption and bed saturation occurred at 20 minutes. Optimization results of Ni(II) and Cd(II) by Pseudomonas putida from the Design Expert software were obtained as bed height of 19.93 cm, initial metal ion concentration of 103.85 mg/L, and flow rate of 310.57 mL/h. The percent biosorption of Ni(II) and Cd(II) is 87.2% and 88.2% respectively. The predicted optimized parameters are in agreement with the experimental results. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=packed%20bed%20bioreactor" title="packed bed bioreactor">packed bed bioreactor</a>, <a href="https://publications.waset.org/abstracts/search?q=response%20surface%20mthodology" title=" response surface mthodology"> response surface mthodology</a>, <a href="https://publications.waset.org/abstracts/search?q=pseudomonas%20putida" title=" pseudomonas putida"> pseudomonas putida</a>, <a href="https://publications.waset.org/abstracts/search?q=biosorption" title=" biosorption"> biosorption</a>, <a href="https://publications.waset.org/abstracts/search?q=waste%20water" title=" waste water"> waste water</a> </p> <a href="https://publications.waset.org/abstracts/16551/optimization-studies-on-biosorption-of-niii-and-cdii-from-wastewater-using-pseudomonas-putida-in-a-packed-bed-bioreactor" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/16551.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">452</span> </span> </div> </div> <ul class="pagination"> <li class="page-item disabled"><span class="page-link">&lsaquo;</span></li> <li class="page-item active"><span class="page-link">1</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=stirred%20airlift%20bioreactor&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=stirred%20airlift%20bioreactor&page=3">3</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=stirred%20airlift%20bioreactor&page=4">4</a></li> <li class="page-item"><a class="page-link" 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