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<p>Using a composite ecological remediation system for the long-term field application has been remaining a challenge. To cope with this problem, we fabricated a mussels-bacteria stereo integrated (MBSI) system deployed on a river bank to improve the river water quality. The MBSI system was operated for more than 4&#xa0;months, and it was found that the turbidity, COD and TN of river water decreased significantly (P &lt; 0.05) after the MBSI system treatment. The mussels layer was dominated by fermentation bacteria like <i>Cetobacterium</i> (7.6%), while ammoxidation bacteria of <i>norank_NS9_marine_group</i> (9.7%), denitrication bacteria of <i>Thauera</i> (9.4%) and anammox bacteria of <i>Pirellula</i> (3.7%) predominated in the immobilization microorganisms, demonstrating that the major responsibility was COD removal for mussels and nitrogen removal for immobilization bacteria. In summary, mussels and bacteria (immobilized) reinforced the synergistic effect, the combination of which provided a simple and feasible system for the improvement of river water quality and a promising tool for the engineering practice.</p>

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Field Application of Mussels-bacteria Stereo Integrated System for Improving Water Quality of Polluted River

  • 期刊论文

  • 发表日期：

    2025年4月22日

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  • Qiang Wang,
  • Han Wang,
  • Xulin Chen,
  • Pan Yang,
  • Yunlong Yang,
  • Jibo Xiao

摘要

Using a composite ecological remediation system for the long-term field application has been remaining a challenge. To cope with this problem, we fabricated a mussels-bacteria stereo integrated (MBSI) system deployed on a river bank to improve the river water quality. The MBSI system was operated for more than 4 months, and it was found that the turbidity, COD and TN of river water decreased significantly (P < 0.05) after the MBSI system treatment. The mussels layer was dominated by fermentation bacteria like Cetobacterium (7.6%), while ammoxidation bacteria of norank_NS9_marine_group (9.7%), denitrication bacteria of Thauera (9.4%) and anammox bacteria of Pirellula (3.7%) predominated in the immobilization microorganisms, demonstrating that the major responsibility was COD removal for mussels and nitrogen removal for immobilization bacteria. In summary, mussels and bacteria (immobilized) reinforced the synergistic effect, the combination of which provided a simple and feasible system for the improvement of river water quality and a promising tool for the engineering practice.