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Effect of ferric hydroxide on membrane fouling in membrane bioreactor treating pharmaceutical wastewater.

Authors
  • Huang, Shujuan1
  • Shi, Xueqing2
  • Bi, Xuejun2
  • Lee, Lai Yoke1
  • Ng, How Yong3
  • 1 Centre for Water Research, Department of Civil & Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, 117576 Singapore, Singapore. , (Singapore)
  • 2 School of Environmental and Municipal Engineering, Qingdao University of Technology, 11 Fushun Road, Qingdao 266033, PR China. , (China)
  • 3 Centre for Water Research, Department of Civil & Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, 117576 Singapore, Singapore. Electronic address: [email protected] , (Singapore)
Type
Published Article
Journal
Bioresource technology
Publication Date
Nov 01, 2019
Volume
292
Pages
121852–121852
Identifiers
DOI: 10.1016/j.biortech.2019.121852
PMID: 31386944
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Membrane fouling is considered as a main drawback for MBR technology especially treating industrial wastewater. Therefore, this study aimed to investigate the effect of fouling in membrane bioreactor (MBR) treating pharmaceutical wastewater with the addition of ferric hydroxide. Two identical lab-scale MBRs, namely, a control MBR (Co-MBR) and an enhanced MBR dosed with ferric hydroxide (Fe-MBR), were operated in parallel. The results demonstrate membrane fouling was retarded by 35% with the addition of iron. Further exploration of membrane fouling mechanisms showed iron addition resulted in increase in biomass floc size, enhancement of bacteria activity and reduction of dissolved organic concentration, especially carbohydrate, biopolymer and low molecular weight compounds concentrations in mixed liquor. There was also lower abundance of bacterial associated with biofilm formation in the Fe-MBR compared with the Co-MBR. These findings collectively contributed to the positive impacts on membrane fouling mitigation. Copyright © 2019 Elsevier Ltd. All rights reserved.

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