JIANG Ming,SHI Fang?yong,GU Xue?feng,et al.Design of a Wastewater Treatment Plant Upgrading Project in an Industry Park to Meet Quasi?Ⅳ Surface Water Standard[J].China Water & Wastewater,2022,38(No.2):59-63.
Design of a Wastewater Treatment Plant Upgrading Project in an Industry Park to Meet Quasi?Ⅳ Surface Water Standard
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
No.第2
Page:
59-63
Column:
Date of publication:
2022-01-17
- Keywords:
- industrial park; upgrading; quasi?Ⅳ standard
- Abstract:
- The design scale of a wastewater treatment plant (WWTP) upgrading project in Xuyi is 2×104 m3/d. Except COD and TP in the effluent which are required to be no more than 30 mg/L and 0.4 mg/L, the effluent quality of the WWTP shall comply with the first level A criteria specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002). The original treatment process was hydrolytic acidification, DN/CN combined filter, D?type filter and disinfection tank. As the influent (mainly industrial wastewater) is characterized by high concentration and large fluctuation of the water quality, the main process of the upgrading project was transformed into hydrolytic acidification, seven?stage biochemical process, advanced treatment and ultraviolet disinfection. After the tail water of the WWTP was purified by the constructed wetland, the effluent quality reached the quasi?Ⅳ surface water standard. The trial operation data showed that the effluent quality of the WWTP generally reached the design standard. The process makes full use of the biochemical units to solve the problem of nitrogen removal and ensures the removal of refractory organic pollutants through advanced treatment.
Last Update:
2022-01-17