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Baptista</title> <meta name="description" content="Search results for: A. A. Baptista"> <meta name="keywords" content="A. A. Baptista"> <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 class="d-block d-lg-none navbar-toggler ml-auto" type="button" data-toggle="collapse" data-target="#navbarMenu" aria-controls="navbarMenu" aria-expanded="false" aria-label="Toggle navigation"> <span class="navbar-toggler-icon"></span> </button> <div class="w-100"> <div class="d-none d-lg-flex flex-row-reverse"> <form method="get" action="https://waset.org/search" class="form-inline my-2 my-lg-0"> <input class="form-control mr-sm-2" type="search" placeholder="Search Conferences" value="A. 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A. Baptista"> <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> 8</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: A. A. Baptista</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">8</span> Culture and Internationalization: A Study About Brazilian Companies in Bolivia</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Renato%20Dias%20Baptista">Renato Dias Baptista</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The purpose of this paper is to analyze the elements of the cultural dimension in the internationalization process of Brazilian companies in Bolivia. This paper is based on research on two major Brazilian transnational companies which have plants in Bolivia. To achieve the objectives, the interconnective characteristics of culture in the process of productive internationalization were analyzed aiming to highlight it as a guiding element opposite the premises of the Brazilian leadership in the integration and development of the continent. The analysis aims to give relevance to the culture of a country and its relations with internationalization. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=interculturalism" title="interculturalism">interculturalism</a>, <a href="https://publications.waset.org/abstracts/search?q=transnational" title=" transnational"> transnational</a>, <a href="https://publications.waset.org/abstracts/search?q=internationalization" title=" internationalization"> internationalization</a>, <a href="https://publications.waset.org/abstracts/search?q=organizational%20development" title=" organizational development"> organizational development</a> </p> <a href="https://publications.waset.org/abstracts/61591/culture-and-internationalization-a-study-about-brazilian-companies-in-bolivia" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/61591.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">302</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">7</span> The Dimensions of Culture in the Productive Internationalization Process: An Overview about Brazilian Companies in Bolivia</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Renato%20Dias%20Baptista">Renato Dias Baptista</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The purpose of this paper is to analyze the elements of the cultural dimension in the internationalization process of Brazilian companies in Bolivia. This paper is based on research on two major Brazilian transnational companies which have plants in Bolivia. To achieve the objectives, the interconnective characteristics of culture in the process of productive internationalization were analyzed aiming to highlight it as a guiding element opposite the premises of the Brazilian leadership in the integration and development of the continent. The analysis aims to give relevance to the culture of a country and its relations with internationalization. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=culture" title="culture">culture</a>, <a href="https://publications.waset.org/abstracts/search?q=transnational" title=" transnational"> transnational</a>, <a href="https://publications.waset.org/abstracts/search?q=internationalization" title=" internationalization"> internationalization</a>, <a href="https://publications.waset.org/abstracts/search?q=Bolivia" title=" Bolivia"> Bolivia</a>, <a href="https://publications.waset.org/abstracts/search?q=Brazil" title=" Brazil"> Brazil</a> </p> <a href="https://publications.waset.org/abstracts/8444/the-dimensions-of-culture-in-the-productive-internationalization-process-an-overview-about-brazilian-companies-in-bolivia" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/8444.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">421</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">6</span> Augmented Reality as Enhancer of the Lean Philosophy: An Exploratory Study</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=P.%20Gil">P. Gil</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20Charrua-Santos"> F. Charrua-Santos</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20A.%20Baptista"> A. A. Baptista</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Azevedo"> S. Azevedo</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Espirito-Santo"> A. Espirito-Santo</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20P%C3%A1scoa"> J. P谩scoa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Lean manufacturing is a philosophy of industrial management that aims to identify and eliminate any waste that exists in the companies. The augmented reality is a new technology that stills being developed in terms of software and hardware. This technology consists of an image capture device, a device for data processing and an image visualization equipment to visualize collected and processed images. It is characterized by being a technology that merges the reality with the virtual environment, so there is an instantaneous interaction between the two environments. The present work intends to demonstrate that the use of the augmented reality will contribute to improve some tools and methods used in Lean manufacturing philosophy. Through several examples of application in industry it will be demonstrated that the technological impact of the augmented reality on the Lean Manufacturing philosophy contribute to added value improvements. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=lean%20manufacturing" title="lean manufacturing">lean manufacturing</a>, <a href="https://publications.waset.org/abstracts/search?q=augmented%20reality" title=" augmented reality"> augmented reality</a>, <a href="https://publications.waset.org/abstracts/search?q=case%20studies" title=" case studies"> case studies</a>, <a href="https://publications.waset.org/abstracts/search?q=value" title=" value "> value </a> </p> <a href="https://publications.waset.org/abstracts/29014/augmented-reality-as-enhancer-of-the-lean-philosophy-an-exploratory-study" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/29014.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">624</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">5</span> Assessment of Music Performance Anxiety in Portuguese Children and Adolescents</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Pedro%20Dias">Pedro Dias</a>, <a href="https://publications.waset.org/abstracts/search?q=Lurdes%20Verissimo"> Lurdes Verissimo</a>, <a href="https://publications.waset.org/abstracts/search?q=Maria%20Joao%20Baptista"> Maria Joao Baptista</a>, <a href="https://publications.waset.org/abstracts/search?q=Ana%20Pinheiro"> Ana Pinheiro</a>, <a href="https://publications.waset.org/abstracts/search?q=Patricia%20Oliveira-Silva"> Patricia Oliveira-Silva</a>, <a href="https://publications.waset.org/abstracts/search?q=Sofia%20Serra"> Sofia Serra</a>, <a href="https://publications.waset.org/abstracts/search?q=Daniela%20Coimbra"> Daniela Coimbra</a> </p> <p class="card-text"><strong>Abstract:</strong></p> To achieve a high standard in performance, a musician must be well in all aspects of health (physical, mental and social). Anxiety in performance is related to the high level of coordination and skill needed in performance, as well as to the public evaluation of the performer. It affects some key elements of performance, such as concentration, memory, motor coordination, and relaxation. This work presents two studies focused on the adaptation and evaluation of the psychometric properties of the Music Performance Anxiety Inventory (MPAI-A) in young Portuguese music students. The first study was conducted with a sample of 161 adolescent music students, who responded to the Portuguese version of this instrument, and to the State-Trait Anxiety Inventory for Children (STAIC-c2). Validity and reliability were examined, and this measure revealed robust psychometric properties in this sample. The second study aimed to adapt the MPAI to a younger population (one hundred 8-10 years-old music students). Again, the MPAI and the STAIC c-2 were used in this study. Exploratory factor analysis, correlations, and internal consistency were used to evaluate the final children version of the instrument (MPAI-C), presenting a different factor structure compared to the adolescent version (10 items organized in 2 factors) and high levels of reliability and convergent validity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=anxiety" title="anxiety">anxiety</a>, <a href="https://publications.waset.org/abstracts/search?q=assessment" title=" assessment"> assessment</a>, <a href="https://publications.waset.org/abstracts/search?q=children%20and%20adolescents" title=" children and adolescents"> children and adolescents</a>, <a href="https://publications.waset.org/abstracts/search?q=music%20performance" title=" music performance"> music performance</a> </p> <a href="https://publications.waset.org/abstracts/98451/assessment-of-music-performance-anxiety-in-portuguese-children-and-adolescents" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/98451.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">190</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">4</span> Evaluation of Natural Waste Materials for Ammonia Removal in Biofilters</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=R.%20F.%20Vieira">R. F. Vieira</a>, <a href="https://publications.waset.org/abstracts/search?q=D.%20Lopes"> D. Lopes</a>, <a href="https://publications.waset.org/abstracts/search?q=I.%20Baptista"> I. Baptista</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20A.%20Figueiredo"> S. A. Figueiredo</a>, <a href="https://publications.waset.org/abstracts/search?q=V.%20F.%20Domingues"> V. F. Domingues</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Jorge"> R. Jorge</a>, <a href="https://publications.waset.org/abstracts/search?q=C.%20Delerue-matos"> C. Delerue-matos</a>, <a href="https://publications.waset.org/abstracts/search?q=O.%20M.%20Freitas"> O. M. Freitas</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Odours are generated in municipal solid wastes management plants as a result of decomposition of organic matter, especially when anaerobic degradation occurs. Information was collected about the substances and respective concentration in the surrounding atmosphere of some management plants. The main components which are associated with these unpleasant odours were identified: ammonia, hydrogen sulfide and mercaptans. The first is the most common and the one that presents the highest concentrations, reaching values of 700 mg/m3. Biofiltration, which involves simultaneously biodegradation, absorption and adsorption processes, is a sustainable technology for the treatment of these odour emissions when a natural packing material is used. The packing material should ideally be cheap, durable, and allow the maximum microbiological activity and adsorption/absorption. The presence of nutrients and water is required for biodegradation processes. Adsorption and absorption are enhanced by high specific surface area, high porosity and low density. The main purpose of this work is the exploitation of natural waste materials, locally available, as packing media: heather (Erica lusitanica), chestnut bur (from Castanea sativa), peach pits (from Prunus persica) and eucalyptus bark (from Eucalyptus globulus). Preliminary batch tests of ammonia removal were performed in order to select the most interesting materials for biofiltration, which were then characterized. The following physical and chemical parameters were evaluated: density, moisture, pH, buffer and water retention capacity. The determination of equilibrium isotherms and the adjustment to Langmuir and Freundlich models was also performed. Both models can fit the experimental results. Based both in the material performance as adsorbent and in its physical and chemical characteristics, eucalyptus bark was considered the best material. It presents a maximum adsorption capacity of 0.78卤0.45 mol/kg for ammonia. The results from its characterization are: 121 kg/m3 density, 9.8% moisture, pH equal to 5.7, buffer capacity of 0.370 mmol H+/kg of dry matter and water retention capacity of 1.4 g H2O/g of dry matter. The application of natural materials locally available, with little processing, in biofiltration is an economic and sustainable alternative that should be explored. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ammonia%20removal" title="ammonia removal">ammonia removal</a>, <a href="https://publications.waset.org/abstracts/search?q=biofiltration" title=" biofiltration"> biofiltration</a>, <a href="https://publications.waset.org/abstracts/search?q=natural%20materials" title=" natural materials"> natural materials</a>, <a href="https://publications.waset.org/abstracts/search?q=odour%20control" title=" odour control"> odour control</a> </p> <a href="https://publications.waset.org/abstracts/24769/evaluation-of-natural-waste-materials-for-ammonia-removal-in-biofilters" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24769.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">369</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">3</span> Synthesis and Characterization of pH-Responsive Nanocarriers Based on POEOMA-b-PDPA Block Copolymers for RNA Delivery</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bruno%20Baptista">Bruno Baptista</a>, <a href="https://publications.waset.org/abstracts/search?q=Andreia%20S.%20R.%20Oliveira"> Andreia S. R. Oliveira</a>, <a href="https://publications.waset.org/abstracts/search?q=Patricia%20V.%20Mendonca"> Patricia V. Mendonca</a>, <a href="https://publications.waset.org/abstracts/search?q=Jorge%20F.%20J.%20Coelho"> Jorge F. J. Coelho</a>, <a href="https://publications.waset.org/abstracts/search?q=Fani%20Sousa"> Fani Sousa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Drug delivery systems are designed to allow adequate protection and controlled delivery of drugs to specific locations. These systems aim to reduce side effects and control the biodistribution profile of drugs, thus improving therapeutic efficacy. This study involved the synthesis of polymeric nanoparticles, based on amphiphilic diblock copolymers, comprising a biocompatible, poly (oligo (ethylene oxide) methyl ether methacrylate (POEOMA) as hydrophilic segment and a pH-sensitive block, the poly (2-diisopropylamino)ethyl methacrylate) (PDPA). The objective of this work was the development of polymeric pH-responsive nanoparticles to encapsulate and carry small RNAs as a model to further develop non-coding RNAs delivery systems with therapeutic value. The responsiveness of PDPA to pH allows the electrostatic interaction of these copolymers with nucleic acids at acidic pH, as a result of the protonation of the tertiary amine groups of this polymer at pH values below its pKa (around 6.2). Initially, the molecular weight parameters and chemical structure of the block copolymers were determined by size exclusion chromatography (SEC) and nuclear magnetic resonance (1H-NMR) spectroscopy, respectively. Then, the complexation with small RNAs was verified, generating polyplexes with sizes ranging from 300 to 600 nm and with encapsulation efficiencies around 80%, depending on the molecular weight of the polymers, their composition, and concentration used. The effect of pH on the morphology of nanoparticles was evaluated by scanning electron microscopy (SEM) being verified that at higher pH values, particles tend to lose their spherical shape. Since this work aims to develop systems for the delivery of non-coding RNAs, studies on RNA protection (contact with RNase, FBS, and Trypsin) and cell viability were also carried out. It was found that they induce some protection against constituents of the cellular environment and have no cellular toxicity. In summary, this research work contributes to the development of pH-sensitive polymers, capable of protecting and encapsulating RNA, in a relatively simple and efficient manner, to further be applied on drug delivery to specific sites where pH may have a critical role, as it can occur in several cancer environments. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=drug%20delivery%20systems" title="drug delivery systems">drug delivery systems</a>, <a href="https://publications.waset.org/abstracts/search?q=pH-responsive%20polymers" title=" pH-responsive polymers"> pH-responsive polymers</a>, <a href="https://publications.waset.org/abstracts/search?q=POEOMA-b-PDPA" title=" POEOMA-b-PDPA"> POEOMA-b-PDPA</a>, <a href="https://publications.waset.org/abstracts/search?q=small%20RNAs" title=" small RNAs"> small RNAs</a> </p> <a href="https://publications.waset.org/abstracts/134296/synthesis-and-characterization-of-ph-responsive-nanocarriers-based-on-poeoma-b-pdpa-block-copolymers-for-rna-delivery" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/134296.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">259</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">2</span> Localization of Radioactive Sources with a Mobile Radiation Detection System using Profit Functions</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Lu%C3%ADs%20Miguel%20Cabe%C3%A7a%20Marques">Lu铆s Miguel Cabe莽a Marques</a>, <a href="https://publications.waset.org/abstracts/search?q=Alberto%20Manuel%20Martinho%20Vale"> Alberto Manuel Martinho Vale</a>, <a href="https://publications.waset.org/abstracts/search?q=Jos%C3%A9%20Pedro%20Miragaia%20Trancoso%20Vaz"> Jos茅 Pedro Miragaia Trancoso Vaz</a>, <a href="https://publications.waset.org/abstracts/search?q=Ana%20Sofia%20Baptista%20Fernandes"> Ana Sofia Baptista Fernandes</a>, <a href="https://publications.waset.org/abstracts/search?q=Rui%20Alexandre%20de%20Barros%20Coito"> Rui Alexandre de Barros Coito</a>, <a href="https://publications.waset.org/abstracts/search?q=Tiago%20Miguel%20Prates%20da%20Costa"> Tiago Miguel Prates da Costa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The detection and localization of hidden radioactive sources are of significant importance in countering the illicit traffic of Special Nuclear Materials and other radioactive sources and materials. Radiation portal monitors are commonly used at airports, seaports, and international land borders for inspecting cargo and vehicles. However, these equipment can be expensive and are not available at all checkpoints. Consequently, the localization of SNM and other radioactive sources often relies on handheld equipment, which can be time-consuming. The current study presents the advantages of real-time analysis of gamma-ray count rate data from a mobile radiation detection system based on simulated data and field tests. The incorporation of profit functions and decision criteria to optimize the detection system's path significantly enhances the radiation field information and reduces survey time during cargo inspection. For source position estimation, a maximum likelihood estimation algorithm is employed, and confidence intervals are derived using the Fisher information. The study also explores the impact of uncertainties, baselines, and thresholds on the performance of the profit function. The proposed detection system, utilizing a plastic scintillator with silicon photomultiplier sensors, boasts several benefits, including cost-effectiveness, high geometric efficiency, compactness, and lightweight design. This versatility allows for seamless integration into any mobile platform, be it air, land, maritime, or hybrid, and it can also serve as a handheld device. Furthermore, integration of the detection system into drones, particularly multirotors, and its affordability enable the automation of source search and substantial reduction in survey time, particularly when deploying a fleet of drones. While the primary focus is on inspecting maritime container cargo, the methodologies explored in this research can be applied to the inspection of other infrastructures, such as nuclear facilities or vehicles. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=plastic%20scintillators" title="plastic scintillators">plastic scintillators</a>, <a href="https://publications.waset.org/abstracts/search?q=profit%20functions" title=" profit functions"> profit functions</a>, <a href="https://publications.waset.org/abstracts/search?q=path%20planning" title=" path planning"> path planning</a>, <a href="https://publications.waset.org/abstracts/search?q=gamma-ray%20detection" title=" gamma-ray detection"> gamma-ray detection</a>, <a href="https://publications.waset.org/abstracts/search?q=source%20localization" title=" source localization"> source localization</a>, <a href="https://publications.waset.org/abstracts/search?q=mobile%20radiation%20detection%20system" title=" mobile radiation detection system"> mobile radiation detection system</a>, <a href="https://publications.waset.org/abstracts/search?q=security%20scenario" title=" security scenario"> security scenario</a> </p> <a href="https://publications.waset.org/abstracts/170854/localization-of-radioactive-sources-with-a-mobile-radiation-detection-system-using-profit-functions" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/170854.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">116</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">1</span> Biofiltration Odour Removal at Wastewater Treatment Plant Using Natural Materials: Pilot Scale Studies</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=D.%20Lopes">D. Lopes</a>, <a href="https://publications.waset.org/abstracts/search?q=I.%20I.%20R.%20Baptista"> I. I. R. Baptista</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20F.%20Vieira"> R. F. Vieira</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20Vaz"> J. Vaz</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Varela"> H. Varela</a>, <a href="https://publications.waset.org/abstracts/search?q=O.%20M.%20Freitas"> O. M. Freitas</a>, <a href="https://publications.waset.org/abstracts/search?q=V.%20F.%20Domingues"> V. F. Domingues</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Jorge"> R. Jorge</a>, <a href="https://publications.waset.org/abstracts/search?q=C.%20Delerue-Matos"> C. Delerue-Matos</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20A.%20Figueiredo"> S. A. Figueiredo</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Deodorization is nowadays a need in wastewater treatment plants. Nitrogen and sulphur compounds, volatile fatty acids, aldehydes and ketones are responsible for the unpleasant odours, being ammonia, hydrogen sulphide and mercaptans the most common pollutants. Although chemical treatments of the air extracted are efficient, these are more expensive than biological treatments, namely due the use of chemical reagents (commonly sulphuric acid, sodium hypochlorite and sodium hydroxide). Biofiltration offers the advantage of avoiding the use of reagents (only in some cases, nutrients are added in order to increase the treatment efficiency) and can be considered a sustainable process when the packing medium used is of natural origin. In this work the application of some natural materials locally available was studied both at laboratory and pilot scale, in a real wastewater treatment plant. The materials selected for this study were indigenous Portuguese forest materials derived from eucalyptus and pinewood, such as woodchips and bark, and coconut fiber was also used for comparison purposes. Their physico-chemical characterization was performed: density, moisture, pH, buffer and water retention capacity. Laboratory studies involved batch adsorption studies for ammonia and hydrogen sulphide removal and evaluation of microbiological activity. Four pilot-scale biofilters (1 cubic meter volume) were installed at a local wastewater treatment plant treating odours from the effluent receiving chamber. Each biofilter contained a different packing material consisting of mixtures of eucalyptus bark, pine woodchips and coconut fiber, with added buffering agents and nutrients. The odour treatment efficiency was monitored over time, as well as other operating parameters. The operation at pilot scale suggested that between the processes involved in biofiltration - adsorption, absorption and biodegradation - the first dominates at the beginning, while the biofilm is developing. When the biofilm is completely established, and the adsorption capacity of the material is reached, biodegradation becomes the most relevant odour removal mechanism. High odour and hydrogen sulphide removal efficiencies were achieved throughout the testing period (over 6 months), confirming the suitability of the materials selected, and mixtures thereof prepared, for biofiltration applications. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ammonia%20hydrogen%20sulphide%20and%20removal" title="ammonia hydrogen sulphide and removal">ammonia hydrogen sulphide and removal</a>, <a href="https://publications.waset.org/abstracts/search?q=biofiltration" title=" biofiltration"> biofiltration</a>, <a href="https://publications.waset.org/abstracts/search?q=natural%20materials" title=" natural materials"> natural materials</a>, <a href="https://publications.waset.org/abstracts/search?q=odour%20control%20in%20wastewater%20treatment%20plants" title=" odour control in wastewater treatment plants"> odour control in wastewater treatment plants</a> </p> <a href="https://publications.waset.org/abstracts/27637/biofiltration-odour-removal-at-wastewater-treatment-plant-using-natural-materials-pilot-scale-studies" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/27637.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">302</span> </span> </div> </div> </div> </main> <footer> <div id="infolinks" class="pt-3 pb-2"> <div class="container"> <div style="background-color:#f5f5f5;" class="p-3"> <div class="row"> <div class="col-md-2"> <ul class="list-unstyled"> About <li><a href="https://waset.org/page/support">About Us</a></li> <li><a href="https://waset.org/page/support#legal-information">Legal</a></li> <li><a target="_blank" rel="nofollow" href="https://publications.waset.org/static/files/WASET-16th-foundational-anniversary.pdf">WASET celebrates its 16th foundational anniversary</a></li> 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