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Measurements of gas dispersion parameters were performed and optimal conditions were obtained" /> <meta property="article:author" content="https://independent.academia.edu/RamiroEtchepare" /> <meta name="description" content="Raw water clarification by flotation was studied by injecting air into a centrifugal multiphase pump to generate microbubbles (MBs) and nanobubbles (NBs). Measurements of gas dispersion parameters were performed and optimal conditions were obtained" /> <title>(PDF) Raw water clarification by flotation with micro and nanobubbles generated with a multiphase pump | Ramiro Etchepare - Academia.edu</title> <link rel="canonical" href="https://www.academia.edu/79134098/Raw_water_clarification_by_flotation_with_micro_and_nanobubbles_generated_with_a_multiphase_pump" /> <script async src="https://www.googletagmanager.com/gtag/js?id=G-5VKX33P2DS"></script> <script> window.dataLayer = window.dataLayer || []; function gtag(){dataLayer.push(arguments);} gtag('js', new Date()); gtag('config', 'G-5VKX33P2DS', { cookie_domain: 'academia.edu', send_page_view: false, }); gtag('event', 'page_view', { 'controller': "single_work", 'action': "show", 'controller_action': 'single_work#show', 'logged_in': 'false', 'edge': 'unknown', // Send nil if there is no A/B test bucket, in case some records get logged // with missing data - that way we can distinguish between the two cases. // ab_test_bucket should be of the form <ab_test_name>:<bucket> 'ab_test_bucket': null, }) </script> <script> var $controller_name = 'single_work'; var $action_name = "show"; var $rails_env = 'production'; var $app_rev = '9387f500ddcbb8d05c67bef28a2fe0334f1aafb8'; var $domain = 'academia.edu'; var $app_host = "academia.edu"; var $asset_host = "academia-assets.com"; var $start_time = new Date().getTime(); var $recaptcha_key = "6LdxlRMTAAAAADnu_zyLhLg0YF9uACwz78shpjJB"; var $recaptcha_invisible_key = "6Lf3KHUUAAAAACggoMpmGJdQDtiyrjVlvGJ6BbAj"; var $disableClientRecordHit = false; </script> <script> window.require = { config: function() { return function() {} } } </script> <script> window.Aedu = window.Aedu || {}; window.Aedu.hit_data = null; window.Aedu.serverRenderTime = new Date(1733053588000); window.Aedu.timeDifference = new Date().getTime() - 1733053588000; </script> <script type="application/ld+json">{"@context":"https://schema.org","@type":"ScholarlyArticle","abstract":"Raw water clarification by flotation was studied by injecting air into a centrifugal multiphase pump to generate microbubbles (MBs) and nanobubbles (NBs). Measurements of gas dispersion parameters were performed and optimal conditions were obtained using a pump pressure of 4 bar. Values showed a bubble Sauter diameter of 75 μm, an air holdup of 1.2%, a bubble surface area flux of 34 s−1 and an NB concentration of 1 × 108 NBs mL−1 (measuring 220 nm). Then, a study compared flotation with bubbles formed with the multiphase pump (F-MP) to lamellar settling at the clarification stage of a water treatment plant (WTP), in Brazil. The F-MP showed a higher separation efficiency at high hydraulic loads (9–15 m h−1), even without the use of a polymer, reaching 2 NTU (10–25 NTU raw water feed), which was much lower than the technical goal of the WTP (5 NTU). The results and the technical aspects are discussed, and it is concluded that the employment of MBs and NBs with pumps widens new researc...","author":[{"@context":"https://schema.org","@type":"Person","name":"Ramiro Etchepare"}],"contributor":[],"dateCreated":"2022-05-15","dateModified":"2024-11-30","datePublished":"2017-01-01","headline":"Raw water clarification by flotation with micro and nanobubbles generated with a multiphase pump","inLanguage":"en","keywords":["Materials Science","Medicine","Multidisciplinary","Bubble","Water Science and Technology","Microbubbles","Dissolved Air Flotation"],"locationCreated":null,"publication":"Water Science and Technology","publisher":{"@context":"https://schema.org","@type":"Organization","name":"IWA 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Measurements of gas dispersion parameters were performed and optimal conditions were obtained using a pump pressure of 4 bar. Values showed a bubble Sauter diameter of 75 μm, an air holdup of 1.2%, a bubble surface area flux of 34 s−1 and an NB concentration of 1 × 108 NBs mL−1 (measuring 220 nm). Then, a study compared flotation with bubbles formed with the multiphase pump (F-MP) to lamellar settling at the clarification stage of a water treatment plant (WTP), in Brazil. The F-MP showed a higher separation efficiency at high hydraulic loads (9–15 m h−1), even without the use of a polymer, reaching 2 NTU (10–25 NTU raw water feed), which was much lower than the technical goal of the WTP (5 NTU). The results and the technical aspects are discussed, and it is concluded that the employment of MBs and NBs with pumps widens new researc...","publisher":"IWA Publishing","ai_title_tag":"Flotation Clarification of Raw Water Using Micro and Nanobubbles","publication_date":"2017,,","publication_name":"Water Science and Technology"},"document_type":"paper","pre_hit_view_count_baseline":null,"quality":"high","language":"en","title":"Raw water clarification by flotation with micro and nanobubbles generated with a multiphase pump","broadcastable":true,"draft":null,"has_indexable_attachment":true,"indexable":true}}["work"]; window.loswp.workCoauthors = [4566649]; window.loswp.locale = "en"; window.loswp.countryCode = "SG"; window.loswp.cwvAbTestBucket = ""; window.loswp.designVariant = "ds_vanilla"; window.loswp.fullPageMobileSutdModalVariant = "full_page_mobile_sutd_modal"; window.loswp.useOptimizedScribd4genScript = false; window.loswp.appleClientId = 'edu.academia.applesignon';</script><script defer="" src="https://accounts.google.com/gsi/client"></script><div class="ds-loswp-container"><div class="ds-work-card--grid-container"><div class="ds-work-card--container js-loswp-work-card"><div class="ds-work-card--cover"><div class="ds-work-cover--wrapper"><div class="ds-work-cover--container"><button class="ds-work-cover--clickable js-swp-download-button" data-signup-modal="{"location":"swp-splash-paper-cover","attachmentId":85957127,"attachmentType":"pdf"}"><img alt="First page of “Raw water clarification by flotation with micro and nanobubbles generated with a multiphase pump”" class="ds-work-cover--cover-thumbnail" src="https://0.academia-photos.com/attachment_thumbnails/85957127/mini_magick20220524-14856-aj8vph.png?1653376319" /><img alt="PDF Icon" class="ds-work-cover--file-icon" src="//a.academia-assets.com/assets/single_work_splash/adobe.icon-574afd46eb6b03a77a153a647fb47e30546f9215c0ee6a25df597a779717f9ef.svg" /><div class="ds-work-cover--hover-container"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">download</span><p>Download Free PDF</p></div><div class="ds-work-cover--ribbon-container">Download Free PDF</div><div class="ds-work-cover--ribbon-triangle"></div></button></div></div></div><div class="ds-work-card--work-information"><h1 class="ds-work-card--work-title">Raw water clarification by flotation with micro and nanobubbles generated with a multiphase pump</h1><div class="ds-work-card--work-authors ds-work-card--detail"><a class="ds-work-card--author js-wsj-grid-card-author ds2-5-body-md ds2-5-body-link" data-author-id="4566649" href="https://independent.academia.edu/RamiroEtchepare"><img alt="Profile image of Ramiro Etchepare" class="ds-work-card--author-avatar" src="https://0.academia-photos.com/4566649/1896163/2248526/s65_ramiro.etchepare.jpg" />Ramiro Etchepare</a></div><div class="ds-work-card--detail"><p class="ds-work-card--detail ds2-5-body-sm">2017, Water Science and Technology</p></div><p class="ds-work-card--work-abstract ds-work-card--detail ds2-5-body-md">Raw water clarification by flotation was studied by injecting air into a centrifugal multiphase pump to generate microbubbles (MBs) and nanobubbles (NBs). Measurements of gas dispersion parameters were performed and optimal conditions were obtained using a pump pressure of 4 bar. Values showed a bubble Sauter diameter of 75 μm, an air holdup of 1.2%, a bubble surface area flux of 34 s−1 and an NB concentration of 1 × 108 NBs mL−1 (measuring 220 nm). Then, a study compared flotation with bubbles formed with the multiphase pump (F-MP) to lamellar settling at the clarification stage of a water treatment plant (WTP), in Brazil. The F-MP showed a higher separation efficiency at high hydraulic loads (9–15 m h−1), even without the use of a polymer, reaching 2 NTU (10–25 NTU raw water feed), which was much lower than the technical goal of the WTP (5 NTU). The results and the technical aspects are discussed, and it is concluded that the employment of MBs and NBs with pumps widens new researc...</p><div class="ds-work-card--button-container"><button class="ds2-5-button js-swp-download-button" data-signup-modal="{"location":"continue-reading-button--work-card","attachmentId":85957127,"attachmentType":"pdf","workUrl":"https://www.academia.edu/79134098/Raw_water_clarification_by_flotation_with_micro_and_nanobubbles_generated_with_a_multiphase_pump"}">See full PDF</button><button class="ds2-5-button ds2-5-button--secondary js-swp-download-button" data-signup-modal="{"location":"download-pdf-button--work-card","attachmentId":85957127,"attachmentType":"pdf","workUrl":"https://www.academia.edu/79134098/Raw_water_clarification_by_flotation_with_micro_and_nanobubbles_generated_with_a_multiphase_pump"}"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">download</span>Download PDF</button></div></div></div></div><div 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Microbubbles (MBs) are tiny gas bubbles with diameters in the micrometre range of 10–100 μm. Along with their small size, they share special characteristics like slow buoyancy, large gas–liquid interfacial area and high mass-transfer efficiency. Initially, the review examines the key dissimilarities among the different types of microbubble generators (MBG) towards economic large-scale production of MBs. The applications of MBs to explore their effectiveness at different stages of wastewater treatment extending from aeration, separation/ flotation, ozonation, disinfection and other processes are investigated. A summary of the recent advances of MBs in real and synthetic wastewater treatment, existing research gaps, and limitations in upscaling of the technology, conclusion and future recommendations is detailed. A critical analysis of the energetics and t...</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Contemporary application of microbubble technology in water treatment","attachmentId":102425624,"attachmentType":"pdf","work_url":"https://www.academia.edu/102058874/Contemporary_application_of_microbubble_technology_in_water_treatment","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/102058874/Contemporary_application_of_microbubble_technology_in_water_treatment"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="6" data-entity-id="43372174" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/43372174/Micro_nano_bubbles_technology_and_the_water_related_application">Micro-nano bubbles technology and the water-related application</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="58429716" href="https://cau-cn.academia.edu/NasirAbbasKhan">Nasir Abbas Khan</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Water Supply, 2020</p><p class="ds-related-work--abstract ds2-5-body-sm">Currently, there is a growing demand for water treatment technologies considering the global environmental challenges such as degradation and depletion of water resources. Micro and Nanobubbles (MNBs) technology and its application for wastewater treatment emerged as a problem-solving alternative for such challenges. This paper reviews the important studies on water treatment in the areas of MNBs and discusses their fundamental properties, such as bubbles stability (as tiny entities in water solutions), generation methods, and various chemical and physical features. The paper further overviews the current status of MNB application in water treatment processes such as floatation, aeration, and disinfection and its uses in various sectors, including agriculture, aquaculture, medical, and industry. Based on this review, studies regarding the MNBs' basic properties, generation, and application are identified and recognized for future research. This study concludes that despite the promising role of MNB in the water-related application, the current status of research has not reached its true potential. Specifically, there is a need to enhance the MNBs application at a broader scale.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Micro-nano bubbles technology and the water-related application","attachmentId":63663564,"attachmentType":"pdf","work_url":"https://www.academia.edu/43372174/Micro_nano_bubbles_technology_and_the_water_related_application","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/43372174/Micro_nano_bubbles_technology_and_the_water_related_application"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="7" data-entity-id="66052515" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/66052515/Treating_of_Waste_Water_Applying_Bubble_Flotation">Treating of Waste Water Applying Bubble Flotation</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="108350371" href="https://independent.academia.edu/RAMIROESCUDERO">RAMIRO ESCUDERO</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Water Treatment, 2013</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Treating of Waste Water Applying Bubble Flotation","attachmentId":77394703,"attachmentType":"pdf","work_url":"https://www.academia.edu/66052515/Treating_of_Waste_Water_Applying_Bubble_Flotation","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/66052515/Treating_of_Waste_Water_Applying_Bubble_Flotation"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="8" data-entity-id="104277121" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/104277121/Study_of_3D_Printed_Pressure_Release_Nozzle_for_Microbubble_Formation_in_Full_Scale_Dissolved_Air_Flotation_DAF_">Study of 3D-Printed Pressure Release Nozzle for Microbubble Formation in Full-Scale Dissolved Air Flotation (DAF)</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="97301773" href="https://independent.academia.edu/HESAMPARSAEIAN">HESAM PARSAEIAN</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Chemical Engineering and Processing - 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