Design and operation of und erground reclaimed water plant merging into urban eco-landscape:A case study of Ankang Jiangnan reclaimed water plant
ZHENG Cailin1,,, JIANG Hui2, CHEN Hao3, ZHENG Wenya4, ZHOU Longfei3, ZHANG Xu3, PENG Wentao3, WANG Yefei3 1.Ankang Municipal Garden Department, Ankang 725000, China 2.College of Environmental and Municipal Engineering, Xi 'an University of Architecture and Technology, Xi 'an 710055, China 3.AnkangAnxin Water Environment Development Co., LTD., Ankang 725000, China 4.Ankang Urban Sewage and Garbage Treatment monitoring Center, Ankang 725000, China
Abstract:The construction of reclaimed water plant is critical for water saving. The scale of the underground Jiangnan Reclaimed water Plant in Ankang city is 8×104 m3?d-1. The Plant mainly treats domestic sewage in Jiangnan region of the city and receives no toxic and difficult-to-degrade industrial wastewater. The main pollutants are oxygen-consuming organics (COD, BOD5), SS, NH3-N, TN, TP, etc., which meet the biochemical degradable standards. According to this characteristic, the reclaimed water Plant adopts the improved A2O+suspended filler+efficient precipitation process. Effluent is subject to Class IV surface water quality standards, with limits on COD and NH3-N being 30 mg?L-1 and 1.5 mg?L-1 respectively. Other water quality parameters are subject to class 1A standard of the Discharge Standard of pollutants for municipal wastewater treatment plant (GB18918-2002). After centrifugal concentration and dehydration + low-temperature drying treatment, the waste sludge has a moisture content lower than 60% and is then transported for disposal. The plant has been running stably since it was put into operation, and the effluent water quality has reached the standard. The design of the underground reclaimed water plant provides reference for the construction of similar works. Key words:reclaimed water plant/ underground/ improved A2O/ Suspension packing/ Efficient precipitation.
图1江南再生水厂生态综合体 Figure1.Renderings of the ecological complex construction at the Jiangnan reclaimed water plant
1.Ankang Municipal Garden Department, Ankang 725000, China 2.College of Environmental and Municipal Engineering, Xi 'an University of Architecture and Technology, Xi 'an 710055, China 3.AnkangAnxin Water Environment Development Co., LTD., Ankang 725000, China 4.Ankang Urban Sewage and Garbage Treatment monitoring Center, Ankang 725000, China Received Date: 2020-12-08 Accepted Date: 2021-07-06 Available Online: 2021-09-23 Keywords:reclaimed water plant/ underground/ improved A2O/ Suspension packing/ Efficient precipitation Abstract:The construction of reclaimed water plant is critical for water saving. The scale of the underground Jiangnan Reclaimed water Plant in Ankang city is 8×104 m3?d-1. The Plant mainly treats domestic sewage in Jiangnan region of the city and receives no toxic and difficult-to-degrade industrial wastewater. The main pollutants are oxygen-consuming organics (COD, BOD5), SS, NH3-N, TN, TP, etc., which meet the biochemical degradable standards. According to this characteristic, the reclaimed water Plant adopts the improved A2O+suspended filler+efficient precipitation process. Effluent is subject to Class IV surface water quality standards, with limits on COD and NH3-N being 30 mg?L-1 and 1.5 mg?L-1 respectively. Other water quality parameters are subject to class 1A standard of the Discharge Standard of pollutants for municipal wastewater treatment plant (GB18918-2002). After centrifugal concentration and dehydration + low-temperature drying treatment, the waste sludge has a moisture content lower than 60% and is then transported for disposal. The plant has been running stably since it was put into operation, and the effluent water quality has reached the standard. The design of the underground reclaimed water plant provides reference for the construction of similar works.
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