Optimization of a BCO-SBR Reactor for Rural Sewage Treatment: Parameter Tuning and Kinetic Modeling

Optimization of a BCO-SBR Reactor for Rural Sewage Treatment: Parameter Tuning and Kinetic Modeling | 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 Article Optimization of a BCO-SBR Reactor for Rural Sewage Treatment: Parameter Tuning and Kinetic Modeling Xu Han, Ting Li, Guangchun Liu This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-5562657/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 This study presents a comprehensive optimization of Biological Contact Oxidation-Sequencing Batch Reactor (BCO-SBR) technology for decentralized rural sewage treatment, addressing critical gaps in existing systems through three key innovations: Novel filler configuration: Comparative evaluation of braided filler (BF), polyurethane sponge (PS), and combined filler (CF) revealed BF's superior performance (92.9% COD, 94.9% NH₄⁺-N removal) due to its unique macroporous structure preventing biofilm clogging a limitation noted in previous studies using conventional media (Zhang et al., 2019). Advanced process optimization: Systematic parameter testing established optimal conditions (35% filler ratio, 5h HRT, 4:1 anoxic/aerobic ratio) that improved nitrogen removal by 15–20% compared to traditional SBR systems (Chen et al., 2020), while reducing energy consumption by 30%. Kinetic model development: First application of Monod kinetics to BCO-SBR systems (µmax = 0.115 d⁻¹, Ks = 1417 mg·L⁻¹) providing design parameters absent in prior literature (Yin et al., 2014). The optimized system demonstrates exceptional resilience to organic load shocks (C/N = 6–20:1) and achieves effluent quality meeting China's Grade 1A standards (COD ≤ 30 mg·L⁻¹, NH₄⁺-N ≤ 5 mg·L⁻¹), offering a practical solution for rural areas lacking centralized treatment infrastructure. Earth and environmental sciences/Environmental sciences/Environmental chemistry/Pollution remediation Biological sciences/Biochemistry Biological sciences/Ecology Earth and environmental sciences/Environmental sciences BCO-SBR Reactor System Rural Domestic Sewage Treatment Decentralized Treatment Technology Substrate Degradation Reaction Kinetics 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-5562657","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":443893405,"identity":"d86b5242-94ab-4cca-b783-f7221df70639","order_by":0,"name":"Xu 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Treatment Technology, Substrate Degradation Reaction Kinetics","lastPublishedDoi":"10.21203/rs.3.rs-5562657/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-5562657/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eThis study presents a comprehensive optimization of Biological Contact Oxidation-Sequencing Batch Reactor (BCO-SBR) technology for decentralized rural sewage treatment, addressing critical gaps in existing systems through three key innovations:\u003c/p\u003e \u003cp\u003eNovel filler configuration: Comparative evaluation of braided filler (BF), polyurethane sponge (PS), and combined filler (CF) revealed BF's superior performance (92.9% COD, 94.9% NH₄⁺-N removal) due to its unique macroporous structure preventing biofilm clogging a limitation noted in previous studies using conventional media (Zhang et al., 2019).\u003c/p\u003e \u003cp\u003eAdvanced process optimization: Systematic parameter testing established optimal conditions (35% filler ratio, 5h HRT, 4:1 anoxic/aerobic ratio) that improved nitrogen removal by 15\u0026ndash;20% compared to traditional SBR systems (Chen et al., 2020), while reducing energy consumption by 30%.\u003c/p\u003e \u003cp\u003eKinetic model development: First application of Monod kinetics to BCO-SBR systems (\u0026micro;max\u0026thinsp;=\u0026thinsp;0.115 d⁻\u0026sup1;, Ks\u0026thinsp;=\u0026thinsp;1417 mg\u0026middot;L⁻\u0026sup1;) providing design parameters absent in prior literature (Yin et al., 2014).\u003c/p\u003e \u003cp\u003eThe optimized system demonstrates exceptional resilience to organic load shocks (C/N\u0026thinsp;=\u0026thinsp;6\u0026ndash;20:1) and achieves effluent quality meeting China's Grade 1A standards (COD\u0026thinsp;\u0026le;\u0026thinsp;30 mg\u0026middot;L⁻\u0026sup1;, NH₄⁺-N\u0026thinsp;\u0026le;\u0026thinsp;5 mg\u0026middot;L⁻\u0026sup1;), offering a practical solution for rural areas lacking centralized treatment infrastructure.\u003c/p\u003e","manuscriptTitle":"Optimization of a BCO-SBR Reactor for Rural Sewage Treatment: Parameter Tuning and Kinetic Modeling","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2025-04-17 12:27:42","doi":"10.21203/rs.3.rs-5562657/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"003371e7-e379-4c67-917f-3059ef4ed3b6","owner":[],"postedDate":"April 17th, 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