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Effect of self-drive weak electric strengthening measure on nitrogen removal of a constructed wetland based on ANAMMOX
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Zhan-yu XU1, Chong TANG1, Jun-jie LIU1, Jian-bo ZHANG1, Qi-qi ZHU1, Ling-yang PAN2, Ding-xin LI2, La-mei PING1, Gang LI3, Zhen WANG1, *
China Environmental Science | 2025, 45(5) : 2490 - 2502
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China Environmental Science | 2025, 45(5): 2490-2502
• Water Pollution Control •
Effect of self-drive weak electric strengthening measure on nitrogen removal of a constructed wetland based on ANAMMOX
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Zhan-yu XU1, Chong TANG1, Jun-jie LIU1, Jian-bo ZHANG1, Qi-qi ZHU1, Ling-yang PAN2, Ding-xin LI2, La-mei PING1, Gang LI3, Zhen WANG1, *
Affiliations
  • 1.School of Resources and Environment, Anhui Agricultural University, Hefei 230036, China
  • 2.School of Urban Construction, Anhui Xinhua University, Hefei 230088, China
  • 3.Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
Published: 2025-05-20
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A self-drive weak electric strengthening constructed wetland（SECW）, which was renovated from a hybrid subsurface constructed wetland（HCW）based on ANAMMOX, was established in this study, and its operational performance was thoroughly investigated. Further, the microbial characteristics in the system during the steady operational period were explored, and the nitrogen transformation pathways were also analyzed and elucidated. The results showed that, prefabrication of electroactive biofilms and appropriate layout of the electrodes not only simultaneously enhanced electrode-dependent ammonium oxidation and cathodic denitrification in the SECW, but also significantly increased the abundance and activity of anaerobic ammonium-oxidizing bacteria in its substrate layer. Consequently, a multi-path nitrogen removal system based on ANAMMOX was formed in the device, thereby significantly improving the nitrogen removal performance of the SECW. When the electrode configuration was adopted as “double cathode-single anode” and the hydraulic loading rate（HLR）was 0.08m3/（m2·d）, the SECW exhibited optimal performance. Specifically, its COD, TP, TN, and NH4+-N removal rates could reach up to（91.39±3.09）%,（93.64±1.15）%,（91.67±2.77）%, and（94.34±2.72）%, respectively. Additionally, the mean output voltage and power density of the system respectively maintained at（816.45±8.44）mV and 651.96W/m3.

constructed wetland（CW）  /  self-drive weak electric strengthening  /  ANAMMOX  /  electrode-dependent ammonium oxidation  /  cathodic denitrification  /  nitrogen removal
Zhan-yu XU, Chong TANG, Jun-jie LIU, Jian-bo ZHANG, Qi-qi ZHU, Ling-yang PAN, Ding-xin LI, La-mei PING, Gang LI, Zhen WANG. Effect of self-drive weak electric strengthening measure on nitrogen removal of a constructed wetland based on ANAMMOX[J]. China Environmental Science, 2025 , 45 (5) : 2490 -2502 .
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Year 2025 volume 45 Issue 5
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Article Info
  • Receive Date：2024-10-08
  • Online Date：2026-03-18
  • Published：2025-05-20
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  • Received：2024-10-08
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Affiliations
    1.School of Resources and Environment, Anhui Agricultural University, Hefei 230036, China
    2.School of Urban Construction, Anhui Xinhua University, Hefei 230088, China
    3.Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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