APPLICATION OF TAILWATER CONSTRUCTED WETLAND IN THE GREAT PROTECTION OF YANGTZE RIVER: A CASE STUDY OF JIANGDONG WATER ECOLOGICAL PARK

LU Shengsen; LIU Min; ZUO Zhuo

doi:10.13205/j.hjgc.202301022

Volume 41 Issue 1

Jan. 2023

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2023 > 41(1): 181-188

HE Shengjie, ZHOU Li, ZHU Jia, GAO Jingsi. SIMULATION OF IMPACT OF LOW B/C SEWAGE ON AN A2/O PROCESS[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(3): 81-88. doi: 10.13205/j.hjgc.202203013

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LU Shengsen, LIU Min, ZUO Zhuo. APPLICATION OF TAILWATER CONSTRUCTED WETLAND IN THE GREAT PROTECTION OF YANGTZE RIVER: A CASE STUDY OF JIANGDONG WATER ECOLOGICAL PARK[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(1): 181-188. doi: 10.13205/j.hjgc.202301022

HE Shengjie, ZHOU Li, ZHU Jia, GAO Jingsi. SIMULATION OF IMPACT OF LOW B/C SEWAGE ON AN A2/O PROCESS[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(3): 81-88. doi: 10.13205/j.hjgc.202203013

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APPLICATION OF TAILWATER CONSTRUCTED WETLAND IN THE GREAT PROTECTION OF YANGTZE RIVER: A CASE STUDY OF JIANGDONG WATER ECOLOGICAL PARK

doi: 10.13205/j.hjgc.202301022

LU Shengsen^1,2,
LIU Min^1,2,
ZUO Zhuo^{1,2
,
,}

1. Shanghai Investigation, Design & Research Institute Co., Ltd, Shanghai 200335, China;
2. China Three Gorges Corporation, Wuhan 430010, China

Received Date: 2022-05-16
Available Online: 2023-03-23

Abstract

Abstract

In order to evaluate the operation effect of the tailwater constructed wetland in the Great Protection of Yangtze River and to put forward operation and maintenance management suggestions, the effluent water quality, pollutants removal paths and influence factors of different functional units in the Wuhu Jiangdong Water Ecological Park were monitored and analyzed from July 2021 to January 2022. The results showed that Jiangdong water ecological park still had a good removal effect of various pollutants under the premise of good tailwater quality (The concentration indexes of COD, ammonia nitrogen, total nitrogen, total phosphorus were much lower than the Class A standard in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant) in terms of purification effect. The average removal rates of ammonia nitrogen, total nitrogen and total phosphorus in the enhanced surface flow constructed wetland were 85.53%, 17.6% and 33.71% respectively. The ecological conservation pond connected to the end of the enhanced surface flow constructed wetland had the ability to further reduce the pollutants in the effluent of the enhanced surface flow constructed wetland. The average removal rates of ammonia nitrogen and total phosphorus in summer and autumn (August to October) were 27.04% and 22.51% respectively. In terms of impact factors, temperature and dissolved oxygen concentration had a great impact on the denitrification effect of constructed wetland, therefore it was recommended to take thermal insulation and oxygen-enhancing measures in winter. According to the actual operation, addition of small doses of plant carbon sources in batches, optimization of subsurface flow constructed wetland fillers, and design of multi-stage constructed wetland system can be taken to further ensure the sustainability of the operation effect of the tailwater constructed wetland in the Great Protection of the Yangtze River.

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