RESEARCH ON PROMOTION OF SELENIUM REDUCTION BY DENITRIFYING BACTERIA IN WASTEWATER AND ITS APPLICATION EXPLORATION

HAN Yu-lin; SHI Ling-dong; ZHAO He-ping

doi:10.13205/j.hjgc.202111007

Volume 39 Issue 11

Jan. 2022

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HAN Yu-lin, SHI Ling-dong, ZHAO He-ping. RESEARCH ON PROMOTION OF SELENIUM REDUCTION BY DENITRIFYING BACTERIA IN WASTEWATER AND ITS APPLICATION EXPLORATION[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(11): 62-68,88. doi: 10.13205/j.hjgc.202111007

Citation:

HAN Yu-lin, SHI Ling-dong, ZHAO He-ping. RESEARCH ON PROMOTION OF SELENIUM REDUCTION BY DENITRIFYING BACTERIA IN WASTEWATER AND ITS APPLICATION EXPLORATION[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(11): 62-68,88. doi: 10.13205/j.hjgc.202111007

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RESEARCH ON PROMOTION OF SELENIUM REDUCTION BY DENITRIFYING BACTERIA IN WASTEWATER AND ITS APPLICATION EXPLORATION

doi: 10.13205/j.hjgc.202111007

HAN Yu-lin^1,2,
SHI Ling-dong^1,2,
ZHAO He-ping^{1,2
,
,}

1. MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Science, Zhejiang University, Hangzhou 310058, China;
2. Key Lab of Water Pollution Control & Environmental Safety of Zhejiang Province, Zhejiang University, Hangzhou 310058, China

Received Date: 2021-06-29
Available Online: 2022-01-26

Abstract

Abstract

It is more economical and sustainable that using biological removal method to treat selenium pollution in water bodies. However, most selenate-reducing model bacteria strains have poor environmental adaptability and are difficult in engineering applications. Using certain denitrifying bacteria with selenate reducing ability to treat selenium pollution is a new attempt. This study focused on the selenate-reducing flora dominated by denitrifying bacteria, by using the comparative analysis of substrate reduction rate, combined with the microbial community analysis and functional gene quantification. And we confirmed that periplasmic (Nap) nitrate reductase dominated the selenite reduction, clarified the role of denitrifying bacteria in the selenate reduction process, and further enriched the selenium-reducing flora. Furthermore, we proposed a new selenate removal strategy, that was, enriching the selenate-reducing activated sludge using nitrate as electron acceptor, greatly increased the selenate reduction efficiency and was conducive to engineering application.
- nitrate reductase,
- selenate reduction,
- activated sludge,
- selenium pollution

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References(30)

References

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