PURIFICATION EFFECT OF TOTAL NITROGEN IN LOW-POLLUTED WATER BY A COMPOSITE CONSTRUCTED WETLAND SYSTEM AND ITS MICROBIAL COMMUNITY STRUCTURE

YU Junxia; CHEN Shuangrong; LIU Lingyan; LI Yingmei; LU Yifeng; MA Lan

doi:10.13205/j.hjgc.202201003

Volume 40 Issue 1

Mar. 2022

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YU Junxia, CHEN Shuangrong, LIU Lingyan, LI Yingmei, LU Yifeng, MA Lan. PURIFICATION EFFECT OF TOTAL NITROGEN IN LOW-POLLUTED WATER BY A COMPOSITE CONSTRUCTED WETLAND SYSTEM AND ITS MICROBIAL COMMUNITY STRUCTURE[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(1): 13-20. doi: 10.13205/j.hjgc.202201003

Citation:

YU Junxia, CHEN Shuangrong, LIU Lingyan, LI Yingmei, LU Yifeng, MA Lan. PURIFICATION EFFECT OF TOTAL NITROGEN IN LOW-POLLUTED WATER BY A COMPOSITE CONSTRUCTED WETLAND SYSTEM AND ITS MICROBIAL COMMUNITY STRUCTURE[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(1): 13-20. doi: 10.13205/j.hjgc.202201003

Citation:

YU Junxia, CHEN Shuangrong, LIU Lingyan, LI Yingmei, LU Yifeng, MA Lan. PURIFICATION EFFECT OF TOTAL NITROGEN IN LOW-POLLUTED WATER BY A COMPOSITE CONSTRUCTED WETLAND SYSTEM AND ITS MICROBIAL COMMUNITY STRUCTURE[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(1): 13-20. doi: 10.13205/j.hjgc.202201003

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PURIFICATION EFFECT OF TOTAL NITROGEN IN LOW-POLLUTED WATER BY A COMPOSITE CONSTRUCTED WETLAND SYSTEM AND ITS MICROBIAL COMMUNITY STRUCTURE

doi: 10.13205/j.hjgc.202201003

1. Institute of International Rivers And Eco-Security, Yunnan University, Kunming 650000, China;
2. School of Ecology and Environmental Science, Yunan University, Kunming 650000, China;
3. Yunnan Academy of Science and Technology Development, Kunming 650000, China

Received Date: 2021-01-08
Available Online: 2022-03-30
Publish Date: 2022-03-30

Abstract

Abstract

To understand the treatment effect of total nitrogen in low-polluted wastewater by composite constructed wetland system and the characteristics of microbial community structure in the constructed wetland consisted of surface flow-subsurface flow-submerged plant pond, we researched the removal rates of TN, NH₄⁺-N, NO₃^--N and NO₂^--N in the wastewater by the system. High throughput sequencing method was applied to reveal the microbial community structure and diversity in the units at all levels. The results showed that the effluent of the composite constructed wetland system reached the class Ⅳ of Environmental Quality Standard for Surface Water under the hydraulic load of 0.12~0.24 m³/(m² · d), and had a good removal effect on pollutants. And the removal rate of TN, NH₄⁺-N was 62.35%~76.86% and 36.94%~74.68%. The main denitrification microorganisms in each unit showed great differences. At the genus level, the main denitrification microorganisms in the surface flow wetland were Nitrospira, 996-1 and Hyphomicrobium. The main denitrification bacteria groups in the subsurface flow wetland were Cupriavidus and Acinetobacter. The main denitrification microorganisms in the submerged plant pond were Methylotenera and Methylophilus. The results indicated that all the units contributed to the removal of total nitrogen but there were differences between them.
- total nitrogen,
- microbial diversity,
- composite constructed wetland,
- low-polluted water

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References(44)

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