Evaluating influence of filling fraction of carriers packed in anaerobic side-stream reactors on membrane fouling and microbial community of the coupled membrane bioreactors

Yue Zheng; Zhen Zhou; Lingyan Jiang; Jing Huang; Jie Jiang; Yirong Chen; Yanjun Shao; Siqi Yu; Kaichong Wang; Jianping Huang; Zhiwei Wang

doi:10.1016/j.jhazmat.2020.122030

Evaluating influence of filling fraction of carriers packed in anaerobic side-stream reactors on membrane fouling and microbial community of the coupled membrane bioreactors

J Hazard Mater. 2020 Apr 15:388:122030. doi: 10.1016/j.jhazmat.2020.122030. Epub 2020 Jan 11.

Authors

Yue Zheng¹, Zhen Zhou², Lingyan Jiang³, Jing Huang¹, Jie Jiang¹, Yirong Chen¹, Yanjun Shao¹, Siqi Yu¹, Kaichong Wang¹, Jianping Huang⁴, Zhiwei Wang⁵

Affiliations

¹ Shanghai Engineering Research Center of Energy, Saving in Heat Exchange Systems, College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China.
² Shanghai Engineering Research Center of Energy, Saving in Heat Exchange Systems, College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China. Electronic address: zhouzhen@shiep.edu.cn.
³ State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China; Shanghai Chengtou Wastewater Treatment Co., Ltd, Shanghai 201203, China.
⁴ Shanghai Chengtou Wastewater Treatment Co., Ltd, Shanghai 201203, China.
⁵ State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China.

PMID: 31954301
DOI: 10.1016/j.jhazmat.2020.122030

Abstract

An anoxic/oxic membrane bioreactors (AO-MBR) and three identical anaerobic side-stream reactor coupled with anoxic/oxic membrane bioreactors (ASSR-MBR) were constructed and operated in parallel to investigate the appropriate filling fraction of carriers packed in ASSR, influences on pollutants removal, sludge reduction, membrane fouling and microbial community of ASSR-MBR. Inserting ASSR achieved efficient COD removal and nitrification, and packing carriers in ASSR obtained the highest sludge reduction efficiency of 50.5 % at filling fraction of 25 %. Compared to AO-MBR, inserting ASSR without carriers induced the release of viscous components in extracellular polymeric substances (EPS) and the formation of calcium carbonate-related bacteria on membrane surface, and thus deteriorated membrane fouling. Packing carriers with 25 % filling fraction promoted the hydrolysis of soluble microbial products and EPS, whilst reduced the viscoelasticity of sludge flocs. Higher filling fraction of 50 % increased the shear forces to the biofilm and biomarkers related to membrane fouling, and thus showed little improvement to alleviate membrane fouling. MiSeq sequencing revealed that although it enriched in the bulk sludge of conventional ASSR-MBR and the coupled reactor with filling fraction of 50 %, the floc-forming, hydrolytic and fermentative bacteria were more inclined to attach on the membrane surface and alleviate fouling process.

Keywords: Anaerobic side-stream reactor; Carriers; Fouling; Membrane bioreactor; Sludge reduction.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Ammonium Compounds
Anaerobiosis
Biofouling
Bioreactors / microbiology*
Extracellular Polymeric Substance Matrix
Membranes, Artificial
Microbiota
Nitrogen
Phosphorus
Sewage
Waste Disposal, Fluid
Water Pollutants, Chemical

Substances

Ammonium Compounds
Membranes, Artificial
Sewage
Water Pollutants, Chemical
Phosphorus
Nitrogen