Treating domestic sewage by Integrated Inclined-Plate-Membrane bio-reactor

[摘要] Membrane fouling shorten the service life of the membrane and increases aeration rate for membrane surface cleaning. Two membrane bio-reactors, one for working and another for comparing, were set up to evaluate the feasibility of alleviating membrane fouling and improving wastewater treatment efficiency by integrating inclined-plate precipitation and membrane separation. The result show that: (1) Inclined-plate in reactor had a good effect on pollutant removal of membrane bioreactor. The main role of inclined-plate is dividing reactor space and accelerating precipitation. (2) Working reactor have better performance in COD, TN and TP removal, which can attribute to that working reactor (integrated inclined-plate-Membrane bioreactor) takes both advantages of membrane separation and biological treatment. When influent COD, TP and TN concentration is 163-248 mg/L, 2.08-2.81 mg/L and 24.38-30.49 mg/L in working reactor, effluent concentration is 27-35 mg/L, 0.53-0.59 mg/L and 11.28-11.56 mg/L, respectively. (3) Membrane fouling was well alleviated in integrated inclined-plate-Membrane bioreactor, and membrane normal service time is significantly longer than that in comparing reactor, which can attribute to accelerating precipitation of inclined-plate. In summary, integrated inclined-plate-Membrane bioreactor is a promising technology to alleviating membrane fouling and improving wastewater treatment efficiency, having good performance and bright future in application.

[发布机构] National Supervision and Inspection Center of Environmental Protection Equipment Quality (Jiangsu), Yixing Urban Supervision and Inspection Center of Product Quality and Food Safety, No 100, Keji Avenue, Yixing, Jiangsu Province; 214205, China^1;Chinese Academy for Environmental Planning (CAEP), Beike Bldg. 10, Beijing; 100012, China^2

[关键词] Biological treatment;Domestic sewage;Effluent concentrations;Membrane bioreactor;Membrane separation;Membrane surface;Pollutant removal;Wastewater treatment efficiencies