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Specific approach for membrane fouling control and better treatment performance of an anaerobic submerged membrane bioreactor

Author:
Liu, Yingnan, Zhang, Xinbo, Hao Ngo, Huu, Guo, Wenshan, Wen, Haitao, Deng, Lijuan, Li, Yajing, Guo, Jianbo
Source:
Bioresource technology 2018 v.268 pp. 658-664
ISSN:
0960-8524
Subject:
fouling, membrane bioreactors, mixing, nitrogen
Abstract:
This paper investigated a strategy to minimize membrane fouling and increase treatment efficiency through an investigation of a specific approach by adding sponges into a conventional submerged anaerobic membrane bioreactor (CAnSMBR). During the operation, the protein-based soluble microbial products as the main factor affecting the membrane fouling could be reduced by sponge addition in the CAnSMBR (SAnSMBR). Furthermore, reducing HRT from 18 h to 12 h could shorten the membrane fouling cycle to 62% and 87% in CAnSMBR and SAnSMBR, respectively. At the initial of COD/NO3 ratio ranges from 5 to 4, only 88% of nitrogen in CAnSMBR was removed, while the SAnSMBR could remove more than 90%. TOC removal efficiency could reach more than 95% under a good stirring scenario. It is evident that the SAnSMBR is a promising solution for improving overall CAnSMBR performance and substantially mitigating membrane fouling.
Agid:
6124769