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Strategy to mitigate substrate inhibition in wastewater treatment systems

Author

Listed:
  • Beiying Li

    (Hainan University)

  • Conghe Liu

    (Hainan University)

  • Jingjing Bai

    (Hainan University)

  • Yikun Huang

    (Hainan University)

  • Run Su

    (Hainan University)

  • Yan Wei

    (Hainan University)

  • Bin Ma

    (Hainan University)

Abstract

Global urbanization requires more stable and sustainable wastewater treatment to reduce the burden on the water environment. To address the problem of substrate inhibition of microorganisms during wastewater treatment, which leads to unstable wastewater discharge, this study proposes an approach to enhance the tolerance of bacterial community by artificially setting up a non-lethal high substrate environment. And the feasibility of this approach was explored by taking the inhibition of anammox process by nitrite as an example. It was shown that the non-lethal high substrate environment could enhance the nitrite tolerance of anammox bacterial community, as the specific anammox activity increasing up to 24.71 times at high nitrite concentrations. Moreover, the system composed of anammox bacterial community with high nitrite tolerance also showed greater resistance (two-fold) in response to nitrite shock. The antifragility of the system was enhanced without affecting the operation of the main reactor, and the non-lethal high nitrite environment changed the dominant anammox genera to Candidatus Jettenia. This approach to enhance tolerance of bacterial community in a non-lethal high substrate environment not only allows the anammox system to operate stably, but also promises to be a potential strategy for achieving stable biological wastewater treatment processes to comply with standards.

Suggested Citation

  • Beiying Li & Conghe Liu & Jingjing Bai & Yikun Huang & Run Su & Yan Wei & Bin Ma, 2024. "Strategy to mitigate substrate inhibition in wastewater treatment systems," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
  • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-52364-9
    DOI: 10.1038/s41467-024-52364-9
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    References listed on IDEAS

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