Denitrification-caused suppression of soluble microbial products (SMP) in MBRs used for biological nitrogen removal

Authors

  • Zhongbo Zhou,

    1. SYSU-HKUST Research Center for Innovative Environmental Technology (SHRCIET), School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, P.R. China
    2. Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, P.R. China
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  • Fangang Meng,

    Corresponding author
    1. SYSU-HKUST Research Center for Innovative Environmental Technology (SHRCIET), School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, P.R. China
    2. Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, P.R. China
    • Correspondence concerning this article should be addressed to F. Meng at fgmeng80@126.com.

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  • Hui Lu,

    1. SYSU-HKUST Research Center for Innovative Environmental Technology (SHRCIET), School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, P.R. China
    2. Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, P.R. China
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  • Xiaoshan Jia

    1. SYSU-HKUST Research Center for Innovative Environmental Technology (SHRCIET), School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, P.R. China
    2. Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, P.R. China
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Abstract

Significance

The strategies for reducing SMP-caused membrane fouling are essential for MBR sustainable operation. Comparing the bioprocesses with and without denitrification, we found that the specific yield coefficients of polysaccharides (PS) and proteins (PN) in SMP existing denitrification were significantly lower than those without denitrification. In addition, the freshly produced PS and PN from extracelluar polymeric substances (EPS) could be biodegraded and utilized by denitrifers. These findings indicated that biological denitrification was an important mechanism to reduce SMP and MBR fouling. © 2013 American Institute of Chemical Engineers AIChE J, 59: 3569–3573, 2013

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