Performance of bioferric-submerged membrane bioreactor for dyeing wastewater treatment

查看全文 作　　者：ZOU [1,2]Haiyan;XI [1]Danli

机构地区：[1]Department of Environmental Science and Engineering,Donghua University,Shanghai 200051,China;[2]College of National Land Resource and Environment,Jiangxi Agriculture University,Nanchang 330045,China

出　　处：《Frontiers of Environmental Science & Engineering》索引2007年第1卷第3期,共7页

基　　金：This study was supported by the Key Technologies Research and Development Program of Science and Technology Commission of Shanghai(Grant No.012312032). 摘　　要：Adding iron salt or iron hydroxide to sludge-mixed liquor in an aeration tank of a conventional activated sludge processes(bioferric process)can simultaneously improve the sludge’s filterability and enhance the system’s treatment capacity.In view of this,Fe(OH)3 was added to a submerged membrane bioreactor(SMBR)to enhance the removal efficiency and to mitigate membrane fouling.Bio-ferric process and SMBR were combined to create a novel process called Bioferric-SMBR.A side-by-side comparison study of Bioferric-SMBR and common SMBR dealing with dyeing wastewater was carried out.Bioferric-SMBR showed potential superiority,which could enhance removal efficien-cy,reduce membrane fouling and improve sludge character-istic.When volumetric loading rate was 25% higher than that of common SMBR,the removal efficiencies of Bioferric-SMBR on COD,dye,and NH_(4)^(+)-N were 1.0%,9.5%,and 5.2%higher than that of common SMBR,respectively.The trans-membrane pressure of Bioferric-SMBR was only 36%of that in common SMBR while its membrane flux was 25% higher than that of common SMBR.The stable running period in Bioferric-SMBR was 2.5 times of that in common SMBR when there was no surplus sludge discharged.The mixed liquor suspended solids concentration of Bioferric-SMBR was higher than that of common SMBR with more diversified kinds of microorganisms such as protozoans and metazoans.The mean particle diameter and specific oxygen uptake rate of Bioferric-SMBR were 3.10 and 1.23 times the common SMBR,respectively. 关键词：Bioferric-submerged membrane bioreactor(SMBR) removal efficiency membrane fouling sludge characteristic dyeing wastewater

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Performance of bioferric-submerged membrane bioreactor for dyeing wastewater treatment

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