Mechanism and application of a nitrifying bacteria enrichment carrier in remediation of polluted rural micro-water bodies

LEI Yu; ZHANG Dan; SHANG Keyu; QIN Rui; XIA Jia; XIE Yifei

doi:10.13205/j.hjgc.202601009

Volume 44 Issue 1

Jan. 2026

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LEI Yu, ZHANG Dan, SHANG Keyu, QIN Rui, XIA Jia, XIE Yifei. Mechanism and application of a nitrifying bacteria enrichment carrier in remediation of polluted rural micro-water bodies[J]. ENVIRONMENTAL ENGINEERING , 2026, 44(1): 79-88. doi: 10.13205/j.hjgc.202601009

Citation:

LEI Yu, ZHANG Dan, SHANG Keyu, QIN Rui, XIA Jia, XIE Yifei. Mechanism and application of a nitrifying bacteria enrichment carrier in remediation of polluted rural micro-water bodies[J]. ENVIRONMENTAL ENGINEERING , 2026, 44(1): 79-88. doi: 10.13205/j.hjgc.202601009

Citation:

LEI Yu, ZHANG Dan, SHANG Keyu, QIN Rui, XIA Jia, XIE Yifei. Mechanism and application of a nitrifying bacteria enrichment carrier in remediation of polluted rural micro-water bodies[J]. ENVIRONMENTAL ENGINEERING , 2026, 44(1): 79-88. doi: 10.13205/j.hjgc.202601009

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Mechanism and application of a nitrifying bacteria enrichment carrier in remediation of polluted rural micro-water bodies

doi: 10.13205/j.hjgc.202601009

LEI Yu^1,2,
ZHANG Dan¹,
SHANG Keyu^1,2,
QIN Rui^1,2,
XIA Jia³,
XIE Yifei^{1
,
,}

1. Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610213, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. College of Environmental Science and Engineering, China West Normal University, Nanchong 637009, China

Received Date: 2025-01-21
Available Online: 2026-02-26
Publish Date: 2026-01-22

Abstract

Abstract

To address the issues of NH₃-N and COD pollution， slow natural growth of nitrifying bacteria， and unstable treatment efficiency in rural micro-water bodies， this study examined a polycaprolactone （PCL）-based nitrifying bacteria enrichment carrier， focusing on environmental adaptability， pollutant removal efficiency， and microbial enrichment mechanisms. Key findings include： 1） The carrier showed excellent environmental adaptability at a 0.1% dosage. It performed well within a temperature range of 10 ℃ to 30 ℃ and a pH range of 6 to 9. It could achieve a significant NH₃-N removal under low-temperature and acidic/alkaline conditions. 2） The carrier enabled simultaneous NH₃-N and COD removal， with a removal rate reaching 78.39% for NH₃-N and 71.41% for COD，respectively. 3） The carrier surface enriched nitrifying functional bacteria， including Dechloromonas， norank_f__Anaerolineaceae， and Phreatobacter. Nitrification-related functional genes （amoA and nxrA） showed increased copy numbers. Microbial activity is significantly enhanced.
- nitrifying bacteria,
- microbial enrichment carriers,
- bioremediation,
- rural waters,
- pollution management

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References(49)

References

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