WANG Xu-dong,ZHAO Tong,LIU Qi,et al.Effect of Sponge Filler on AAO-MBR Treatment Efficiency and Membrane Fouling[J].China Water & Wastewater,2021,37(13 13):21-26.
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Effect of Sponge Filler on AAO-MBR Treatment Efficiency and Membrane Fouling

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第37卷 Number: 13 13 Page: 21-26 Column: Date of publication: 2021-07-01
Author(s):
WANG Xu-dong1; 2; 3; ZHAO Tong1; 2; 3; LIU Qi1; 2; 3; Lü Yong-tao1; 2; 3; YANG Yong-zhe1; 2; 3; WANG Lei1; 2; 3
(1. Shaanxi Key Laboratory of Membrane Separation Technology, School of Environmental and Municipal Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China; 2. Shaanxi Key Laboratory of Environmental Engineering, Xi’an 710055, China; 3. Northwest China Key Laboratory of Water Resources and Environment Ecology, Xi’an 710055, China)
Keywords:
hybrid membrane bioreactor; sponge filler; biofilm; membrane fouling
Abstract:
Domestic sewage was treated by AAO-MBR and AAO-HMBR (hybrid membrane bioreactor with sponge filler) under the same operational conditions, and effects of adding sponge filler on treatment efficiency and membrane fouling of AAO-MBR were investigated. Both of the reactors had good removal effect on COD, ammonia nitrogen and TN in domestic sewage, and all other indexes except TP in the effluent could meet the first level A criteria specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002). After adding sponge filler, the removal efficiencies of COD, ammonia nitrogen, TN and TP were increased from 92.71%, 95.08%, 41.87% and 64.13% to 96.06%, 98.34%, 59.10% and 72.20%, respectively. In addition, membrane fouling was improved. When the transmembrane pressure (TMP) reached 26 kPa, HMBR operated for 20 days, while MBR operated for only 13 days. During 60 days of operation, membrane module in MBR was cleaned four times, while the membrane module in HMBR was cleaned only twice. After running for the same time, the membrane surface of MBR had clear visible contaminants, while the membrane surface of HMBR had only a small amount of contaminants. Infrared spectrum analysis showed that the filter cake layer on the membrane surface was mainly proteins and polysaccharides.
Last Update: 2021-07-01