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Iranian Journal of Chemical Engineering، جلد ۲۱، شماره ۳، صفحات ۴۹-۶۵
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عنوان انگلیسی Achieving Optimal Conditions of Membrane Bioreactors for Dairy Industry Wastewater Treatment
چکیده انگلیسی مقاله The optimization of membrane bioreactor (MBR) equipped with a submerged flat-sheet polyethersulfone (PES) membrane for the wastewater treatment from dairy processing facilities was investigated. The effects of key parameters such as the hydraulic retention time (HRT, from 8 to 16 hr), mixed liquor suspended solids (MLSS, 3000 to 9000 mg/L), and rate of aeration (Qair: 1 and 2 L/min) on COD removal efficiency were systematically investigated. Through the response surface method (RSM), the maximum the COD removal efficiency of 92.67% was obtained under the optimal conditions of HRT: 13.83 hr, MLSS: 7239.84 mg/L, and Qair: 1.75 L/min. The statistical analysis identified MLSS as the most influential factor in the COD removal efficiency, accounting for 30% of the variation, followed by HRT with 16%, and the rate of aeration showing the least impact of 8%. A notable reduction in the UV absorbance of wastewater between 200 and 500 nm, after treatment using MBR under optimal conditions, signified successful targeting of toxic or colored pollutants. Finally, a mechanism for the wastewater treatment in MBRs, which included the biological degradation, adsorption on the surface of biomass and membrane, and separation through membrane filtration, was proposed.
کلیدواژه‌های انگلیسی مقاله Membrane bioreactor,Wastewater Treatment,COD removal efficiency,statistical analysis,optimization
نویسندگان مقاله R. Jan Amiri |
Department of Chemical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran

F. Mohammadi |
Department of Chemical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran

N. Azimi |
CFD Research Division, Advanced Chemical Engineering Research Center, Razi University, Kermanshah, Iran

F. Salimi |
Kermanshah Branch, Islamic Azad University, Kermanshah, Iran

نشانی اینترنتی https://www.ijche.com/article_206317_4ead5d80614bb421ffbac028d80ff3c5.pdf
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