Enhancement of SBR’s treatment under organic shock load

Enhancement of SBR’s treatment under organic shock load | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Enhancement of SBR’s treatment under organic shock load Dalia Ahmed, Hesham M. ELKaramany, Ahmed Alged This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4477767/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Organic shock loads often hinder biological wastewater treatment systems from meeting discharge standards, as a result, these systems frequently fail to achieve the required level of treatment so, the potential impact of these loads was investigated using laboratory-scale sequencing batch reactors (SBRs). Short-term (4.5 h) exposure to 721.25 - 1515.36 mg COD/L shock loads reduced the removal ratios of COD by 3.48 % – 31.73 % compared with the control. A mathematical model was developed for COD decomposition and the results obtained from the model were approximately close to the experimental data, and the maximum difference between the experimental and the theoretical removal rates was 3.36 % at a shock organic load of 1019.20 mg COD/L. In addition, the reactor performance was evaluated under successive organic shock loads so, a constant influent COD value of 1249.5 mg/L was applied for eight successive batch cycles and the results indicated that the removal ratio gradually improved with successive loading. As well, to enhance treatment efficiency under organic shock loads the performance of the reactor was evaluated for different MLSS concentrations of 2000, 2600, 3200, 3900, 4200, 4600, 4825, and 5250 mg/L. Three different organic shock loads with COD concentrations of 1043.04, 1205.36, and 1560 mg/L. COD removal ratios of 96.23 %, 86.18 %, and 75.81 % were achieved for the first, second, and third shock loads respectively at a MLSS concentration of 4825 mg/L however, it dropped when MLSS concentration increased to 5250 mg/L. Sequencing Batch Reactor (SBR) municipal wastewater Synthetic organic shock load MLSS Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-4477767","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":310693012,"identity":"a022d869-e1d5-4e15-9bea-e3892a0338e6","order_by":0,"name":"Dalia Ahmed","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA0ElEQVRIiWNgGAWjYDCCAwxsQJJZDszhIUWLMelaEhuI1sJ3/vCzRzcqrNPnz0hgfPC2jUFO3oGAFskbaebGOWfScxtnJDAbzm1jMDY8QECLwQ0GM+nctsO5zRIJbNK8bQyJGxsIaTl//Jt07r/D6WwSCey/gVrqCWs5kAO0peFwAg/QFmaglgR5AjqAfskpk845lm44g+dhs+SccxKGGwhp4Tt/fJt0To21vHx78sEPb8ps5OUJOQwJMILUSgCdSrwWKCDFllEwCkbBKBgZAADFYj2ut2liPAAAAABJRU5ErkJggg==","orcid":"","institution":"Zagazig University","correspondingAuthor":true,"prefix":"","firstName":"Dalia","middleName":"","lastName":"Ahmed","suffix":""},{"id":310693013,"identity":"7d6f26b7-78d2-4951-b74b-c7b9f41dee10","order_by":1,"name":"Hesham M. 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