Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Environmental Science》 2008-10
Add to Favorite Get Latest Update

Effects of Sludge Retention Time(SRT) on the Characteristics of Membrane Bioreactor(MBR)

ZHANG Jing-li1,2, CAO Zhan-ping1, ZHANG Hong-wei1(1.School of Environmental Science and Engineering,Tianjin University,Tianjin 300072,China; 2.Department of Environmental and Municipal Engineering, Tianjin Institute of Urban Construction,Tianjin 300384,China)  
The effects of sludge retention time (SRT) on extracellular polymeric substances (EPS) content, the characteristics of sludge,the size distribution of sludge particles and the membrane resistance of filtration in the membrane bioreactor were studied. The results indicate that the EPS content is about 90 mg/g in the mixed liquor and 0.8 g/m2 on the membrane surface at 30 d of SRT. And EPS contents increase simultaneously with the extension of SRT, but EPS is hardly accumulated on the membrane surface. In addition, the electric charge on the surface of bacteria change and the proportion of hydrophilic group and hydrophobic group enhance with the rise of the EPS content,then the bacteria are transformed from the unstable (R) from to the stable (S) and the sludge is difficult to settle. The size-distribution profile of particles in the mixed liquor presents a bimodal shape at the long SRT and the peak values shift to the smaller range with SRT extension,at 30 d of SRT the average size of particles is about 14 μm and the two peaks occur at 0.5 μm and 16 μm, respectively. It shows that the content and the size distribution of small particles in the mixed liquor are crucial to the membrane fouling. It is found that it is suitable to control the SRT of membrane bioreactor below 120 times of the shortest generation-time of dominant bacteria (at the highest specific growth rate under the operation temperature) considering the membrane pollution and the characteristics of the mixed liquor.
【Fund】: 天津市自然科学基金重点项目(08JCZDJC24300);; 天津市科技创新基金项目(06FZZDSH00900)
【CateGory Index】: X703.1
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
Chinese Journal Full-text Database 5 Hits
1 KANG Chunli,DONG Deming,LI Zhonghua,LI Yu,HUA Xiuyi,GUO Ping (College of Environment and Resources,Jilin University,Changchun 130023,China);Extraction of extracellular polymers from biofilms in natural water by EDTA solution[J];Journal of Northeast Normal University (Natural Science Edition);2003-02
2 LI Jun,ZHANG Gang,JIANG Ding-guo,CHEN Gang,PENG Feng(Beijing Key Laboratory for Water Quality Science & Water Environment Recovery Engineering, Beijing University of Technology,Beijing 100022,China);Discussion on Measures for Lessening Membrane Fouling in Membrane Bioreactor[J];China Water & Wastewater;2007-10
3 LI Shao-feng1,2,CUI Chong-wei3,HUANG Jun-li3(1.Research station for Postdoctoral Fellows,Environmental Technology Co.Ltd., Harbin Institute of Technology,Harbin 150001,China;2.Department of Architecture Engineering,Shenzhen Polytechnic Institute,Shenzhen 518055,China;3.Harbin Institute of Technology,School of Municipal and Environmental Engineering,Harbin 150090,China);Effect of extracellular polymeric substances on membrane fouling of membrane bioreactor[J];Journal of Harbin Institute of Technology;2007-02
4 Wu Jinling Huang Xia(ESPC State Key Laboratory,Department of Environmental Science and Engineering,Tsinghua University,Beijing 100084);Research progress on effect of mixed liquor characteristics on membrane fouling in membrane reactors[J];Techniques and Equipment for Environmental Pollution Control;2006-02
5 ZHOU Jian, LONG Tengrui, MIAO Lili (Faculty of Urban Construction and Environment Engineering, Chongqing University,Chongqing400045);Effect of extracellular polymeric substances(EPS) on sedimentation of activated sludge[J];Acta Scientiae Circumstantiae;2004-04
【Secondary Citations】
Chinese Journal Full-text Database 10 Hits
1 LUO Hong,GU Ping,YANG Zao yan (Environmental Engineering Department,Tianjin University,Tianjin 300072);Study on Filterability of the Mixed Liquor in Membrane Bioreactor[J];URBAN ENVIRONMENT & URBAN ECOLOGY;2000-01
2 BU Duo, ZHANG Ying, GU Ping (School of Environmental Science and Engineering, Tianjin University,Tianjin300072,China);Retarding Membrane Fouling by Ferric Chloride[J];Urban Environment & Urban Ecology;2003-06
3 WANG Ning 1, YU Shu xia 1, ZHU Yan ming 2 (1 Environmental Science Department,Northeast Normal University,Changchun 130024,China; 2 Changchun Institute of Geography ,Chinese Academy of Sciences,Changchun 130021,China);Study on the water quality polluting and contributing factors of Songhua Lake[J];Journal of Northeast Normal University (Natural Science Edition);2001-01
4 LIU Jing-ling 1,2 ,YANG Zhi-feng 1,SHENG Lian-xi 2 (1.The Environmental Science Institute,Beijing Normal University, Beijing 100875,China; 2.School of Urban and Environmental Science,Northeast Normal University,Changchun 130024,China);Primary research on the eco-recovery and sustainable development tactics of the lakes of the North District in China[J];Journal of Northeast Normal University (Natural Science Edition);2002-01
5 LI Chun jie 1, GENG Yan 2, ZHOU Qi 2, GU Guo wei 2 (1. School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China; 2. State Key Lab of Pollution Control and Resource Reuse, Tongji Unive;Effect of PAC on Control of Membrane Fouling in Coke Wastewater Treatment by Submerged Membrane Sequencing Batch Reactor[J];China Water & Wastewater;2002-06
6 ZHAO Ying~1,BAI Xiao-qin~1,GAO Fei-ya~2,GU Ping~1(1.School of Environmental Science and Engineering,Tianjin University,Tianjin 300072,China;2.North China Municipal Engineering Design and Research Institute,Tianjin 300074,China);New Development of Membrane Bioreactor in Wastewater Treatment[J];China Water & Wastewater;2004-12
7 ZHAN Jin 1,GUO Zhigang 2 ,WANG Baoguo 1,PU Yikang 2 and LIU Zheng 1 ( 1Department of Chemical Engineering; 2Department of Electrical Engineering, Tsinghua University,Beijing 100084,China);SURFACE MODIFICATION OF POLYSULFONE MEMBRANE BY LOW TEMPERATURE PLASMA TREATMENT[J];Journal of Chemical Industry and Engineering(China);2004-05
8 ;Analysis on Influences of MLSS on Operation Efficiency of Membrane Bioreactor[J];Environmental Protection Science;2004-01
9 LI Jiu-yi ZUO Hua LUAN Zhao-kun ZHU Bao-xia JIA Zhi-ping (State Key Laboratory of Environmental Aquatic Chemistry,Research Center for Eco-Environmental Sciences,the Chinese Academy of Sciences,Beijing,100085);EFFECTS OF SUBSTRATE CONDITIONS ON COMPOSITIONS OF EXTRACELLULAR POLYMERIC SUBSTANCES IN BIOFILMS[J];Environmental Chemistry;2002-06
10 Gui Ping 1 Mo Li 1,2 Huang Xia 1 (1. ESPC State Key Joint Laboratory, Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084; 2. Urban Water Resources Center, Ministry of Construction, Beijing 100007);Dynamic analysis of the membrane fouling process in a submerged membrane bioreactor[J];Techniques and Equipment for Environmental Pollution Control;2004-02
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved