CONSTRUCTION AND EFFECT OF COMBINED IN-SITU ECOLOGICAL RESTORATION SYSTEM FOR URBAN BLACK AND ODOROUS RIVER WATER: A CASE STUDY IN A BLACK AND ODOROUS RIVER IN SHANGHAI

ZHU Yongqiang; FANG Mingming; XU Tingting; XU Mengya; LIAO Hua; ZHANG Zhanjun

doi:10.13205/j.hjgc.202301029

Volume 41 Issue 1

Jan. 2023

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ZHU Yongqiang, FANG Mingming, XU Tingting, XU Mengya, LIAO Hua, ZHANG Zhanjun. CONSTRUCTION AND EFFECT OF COMBINED IN-SITU ECOLOGICAL RESTORATION SYSTEM FOR URBAN BLACK AND ODOROUS RIVER WATER: A CASE STUDY IN A BLACK AND ODOROUS RIVER IN SHANGHAI[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(1): 240-247. doi: 10.13205/j.hjgc.202301029

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CONSTRUCTION AND EFFECT OF COMBINED IN-SITU ECOLOGICAL RESTORATION SYSTEM FOR URBAN BLACK AND ODOROUS RIVER WATER: A CASE STUDY IN A BLACK AND ODOROUS RIVER IN SHANGHAI

doi: 10.13205/j.hjgc.202301029

1. School of Chemistry and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China;
2. Shanghai Accele Environmental Protection Technology Co., Ltd, Shanghai 200070, China

Received Date: 2022-06-21
Available Online: 2023-03-23

Abstract

Abstract

To investigate the application of combined in-situ ecological restoration technology for the treatment of urban black and odorous river water bodies, based on the restoration concept of in situ ecological restoration, pollution interception and source control, landscape creation, hydrodynamic improvement, and biodiversity. The bioremediation method was mainly used, and the source analysis and water quality tests were conducted. A combined ecological restoration system of microbial carrier slow release+aeration and reoxygenation+aquatic plants+circulation pumping equipment was constructed to conduct an engineering trial study on a black and odorous river in Shanghai. The engineering practice showed that the average removal rates of COD, NH₃-N and TP in the upper, middle, and lower reaches of the river reached 71.25%, 84.10% and 89.94%, respectively, after the test was carried out for 56 days, and the black odor phenomenon was eliminated. The dissolved oxygen content in water increased from 1.1 mg/L to 4.5 mg/L. The water quality restoration of the river was significantly improved and upgraded to Class Ⅳ of China's Surface Water Environmental Quality Standard (GB 3838-2002). The combined ecological restoration system could effectively eliminate the black and odorous phenomenon, increase the dissolved oxygen content, and degrade the organic pollutants in the water body, and has good purification and landscape effect on black and odorous water bodies in cities and towns. This case can provide practical references for the similar projects.
- urban black and odorous river,
- in-situ ecological restoration,
- combined process,
- microbial carrier,
- water plant,
- construction,
- remediation effect assessment

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