Influence of aeration intensity on the performance of A/0-type sequencing batch MBR system treating azo dye wastewater

作     者：Xinhua WANG Jingmei LI Xiufen LI Guocheng DU 

作者机构：Laboratory of Environmental BiotechnologySchool of Environmental and Civil EngineeringJiangnan UniversityWuxi 214122China Key Laboratory of Industrial BiotechnologyMinistry of EducationJiangnan UniversityWuxi 214122China 

出 版 物：《Frontiers of Environmental Science & Engineering》 (环境科学与工程前沿（英文）)

年 卷 期：2011年第5卷第4期

页      面：615-622页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：This research was supported by the National Natural Science Foundation of China(Grant No.50678073) the Tai-Lake Water Specific Program of Jiangsu Province(No.BS2007125) the Scientifically and Technologically Supported Program of Jiangsu Province(No.BE2009636) 

主　　题：batch membrane bioreactor azo dye aeration intensity extracellular polymeric substances sludge properties 

摘      要：Among the numerous parameters affecting the membrane bioreactor(MBR)performance,the aeration intensity is one of the most important *** the present investigation,an anoxic/aerobic-type(A/O-type)sequencing batch MBR system,added anoxic process as a pretreatment to improve the biodegradability of azo dye wastewater,was investigated under different aeration intensities and the impact of the aeration intensity on effluent quantity,sludge properties,extracellular polymeric substances(EPS)amount generated as well as the change of permeation flux were *** lower nor higher aeration intensities could improve A/O-type sequencing batch MBR *** results showed 0.15 m^(3)·h^(-1)aeration intensity was promising for treatment of azo dye wastewater under the conditions *** this aeration intensity,chemical oxygen demand(COD),ammonium nitrogen and color removal as well as membrane flux amounted to 97.8%,96.5%,98.7%and 6.21 L·m^(-2)·h^(-1),*** effluent quality,with 25.0 mg·L^(-1)COD,0.84 mg·L^(-1)ammonium nitrogen and 8 chroma,could directly meet the reuse standard in *** the meantime,the sludge relative hydrophobicity,the bound EPS,soluble EPS and EPS amounts contained in the membrane fouling layer were 70.3%,52.0 mg·g^(-1)VSS,38.8 mg·g^(-1)VSS and 90.8 mg·g^(-1)VSS,respectively,which showed close relationships to both pollutant removals and membrane flux.