Optimization of urban wastewater treatment plants process with low C/N ratio

International Conference on Water Resource and Environment 2016

地球科学;生态环境科学

Zheng, L.^1 ; Xu, G.M.^1 ; Chen, J.^1 ; Chen, B.^1 ; Lv, Z.^1 ; Yang, Y.A.^1

Changzhou Drainage Administration, Changzhou

213017, China^1

关键词: High energy consumption;    Low C/N ratios;    Nitrogen and phosphorus removal;    Phosphorus removal;    Secondary settling tanks;    Treatment plants;    Urban wastewater treatment plants;    Wastewater treatment plants;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/39/1/012017/pdf
DOI  :  10.1088/1755-1315/39/1/012017

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In southern China, the inflow of water to wastewater treatment plants has a lower concentration of organic matter. This causes treatment plants to face issues in the denitrification and phosphorus removal processes such as deficient carbon sources, high energy consumption, and unstable nitrogen removal. To resolve these issues, we propose the reconstruction of the internal reflux port, improvement of the internal reflux ratio to 200%, the addition of carbon source to anoxic zone, and the addition of phosphorus removal agents in secondary settling tank. The results of study show significantly improved efficiency of nitrogen and phosphorus removal, which ensures the stability of subsequent supply of reused water.