YU Yong,YU Sheng-hua,CHEN Da-gang,et al.Improvement of Nitrogen and Phosphorus Removal in CAST Process[J].China Water & Wastewater,2020,36(12):125-128.
Improvement of Nitrogen and Phosphorus Removal in CAST Process
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
12
Page:
125-128
Column:
Date of publication:
2020-06-17
- Abstract:
-
After the industrial wastewater of an upstream industrial park enters a municipal wastewater treatment plant in Zhejiang, the increasing proportion of industrial wastewater causes the variation of influent pollutants ratio, imbalance of carbon to nutrients ratio, and unstable compliance of effluent TN and TP. Thus wastewater treatment plant was retrofitted through the transformation of anoxic tank, aeration system, mixing liquid reflux system and the optimization of operation mode to enhance phosphorus and nitrogen removal. The operation results after reconstruction showed that the effluent TN and TP were 3.43-14.47 mg/L and 0.004-0.481 mg/L, which stably reached the first level A requirements of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002).
Last Update:
2020-06-17