SUN Jian-yu,LEI Ting,LIANG Peng,et al.Application and Optimization of Pulse Aeration in Large-scale Membrane Bioreactor[J].China Water & Wastewater,2021,37(9 9):100-104.
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Application and Optimization of Pulse Aeration in Large-scale Membrane Bioreactor

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第37卷 Number: 9 9 Page: 100-104 Column: Date of publication: 2021-05-01
Author(s):
SUN Jian-yu1; 2; LEI Ting3; LIANG Peng2; HUANG Xia2; 3; LIU Wei4; CHEN Ying4; XUE Tao5; YU Kai-chang5
(1. National Institute of Clean-and-Low-Carbon Energy, Beijing 102211， China； 2. State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084， China； 3. Research and Application Center for Membrane Technology, School of Environment, Tsinghua University, Beijing 100084， China; 4. Meicun Wastewater Treatment Plant, Wuxi Hi-Tech Water Co. Ltd., Wuxi 214112, China; 5. Beijing Origin Water Technology Co. Ltd., Beijing 102206, China)
Keywords:
membrane bioreactor; pulse aeration; membrane fouling; optimization
Abstract:
Application and optimization of pulse aeration in membrane tanks were carried out in a large-scale membrane bioreactor (MBR) plant for municipal wastewater treatment, which aimed to determine the optimal aeration parameters for the project and to reveal the variation rule of the mixed liquid characteristics and membrane fouling under different aeration intensities. The specific membrane flux increased first and then decreased in the membrane tanks as the total aeration flow rate increased from 13 000 m3/h to 17 000 m3/h. The increase of aeration flow rate led to smaller particle size of the sludge in mixed liquor, lower organic concentration in loosely bound extracellular polymeric substances (LB-EPS) on sludge and higher organic concentration in supernatant, resulted in higher membrane fouling potential of supernatant. By comprehensive comparison, the optimal aeration rate of the MBR membrane tank was medium aeration rate (15 000 m3/h). Under the optimal condition, the average specific flux of the modules in the membrane tank reached 0.95 L/(m2·h·kPa).
Last Update: 2021-05-01