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Identification of fouling mechanism in MBR at constant flowrate: model application and SEM-EDX characterizations

Bo Hu, Xingtao Zuo, Juan Xiong, Huimeng Yang, Menghua Cao, Shuili Yu
Available Online 23 October 2017, wst2017538; DOI: 10.2166/wst.2017.538
Bo Hu
College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
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Xingtao Zuo
College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
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  • For correspondence: xingtaozuo@aliyun.com
Juan Xiong
College of Science, Huazhong Agricultural University, Wuhan 430070, China
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Huimeng Yang
College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
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Menghua Cao
College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
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Shuili Yu
State Key Laboratory of Pollution Control and Resource Research, Tongji University, Shanghai 200092, China
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Abstract

Fundamental understanding on the fouling mechanism is critical to improve filtration operation. The performance of four parallel MBRs with different SRT was monitored during long-term constant flowrate filtration. Characteristics of the membrane and transmembrane pressure (TMP) profiles obtained were studied to demonstrate the fouling mechanisms. The capacity of both classical blocking models and their combined models was evaluated. The intermediate model provided a very good agreement with all the TMP data. However, the combined cake-intermediate and intermediate-standard model were more effective in the description of the experimental data. The contributions analysis indicated that the cake, intermediate and standard blocking model were the dominant fouling mechanisms. SEM-EDX observation showed that the cake blocking of organic and standard blocking of inorganic had the main contributions to membrane fouling. The combined cake-intermediate and intermediate-standard models may be applicable to systems where these two models are consistent with the experimentally observed fouling mechanisms in MBR.

  • blocking laws
  • fouling mechanism
  • MBR
  • TMP
  • First received 15 May 2017.
  • Accepted in revised form 6 October 2017.
  • © IWA Publishing 2017
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Identification of fouling mechanism in MBR at constant flowrate: model application and SEM-EDX characterizations
Bo Hu, Xingtao Zuo, Juan Xiong, Huimeng Yang, Menghua Cao, Shuili Yu
Water Science and Technology Oct 2017, wst2017538; DOI: 10.2166/wst.2017.538
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Identification of fouling mechanism in MBR at constant flowrate: model application and SEM-EDX characterizations
Bo Hu, Xingtao Zuo, Juan Xiong, Huimeng Yang, Menghua Cao, Shuili Yu
Water Science and Technology Oct 2017, wst2017538; DOI: 10.2166/wst.2017.538

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Keywords

blocking laws
fouling mechanism
MBR
TMP
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