WEIXiang,LIHuai-bo,ZHENGKai-kai,et al.Operation Evaluation of Xibei Wastewater Treatment Plant in Wuxi and Its Optimization[J].China Water & Wastewater,2024,40(3):95-100.
Operation Evaluation of Xibei Wastewater Treatment Plant in Wuxi and Its Optimization
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第3期
Page:
95-100
Column:
Date of publication:
2024-02-01
- Keywords:
- upgrading and reconstruction; wastewater treatment plant; full process test analysis; characteristics of activated sludge
- Abstract:
- This paper analyzed the existing problems and proposed the improvement scheme of Xibei Wastewater Treatment Plant in Wuxi according to the whole process test and activated sludge characteristics. The nitrification rate (measured by NH3-N) of the plant was at a low level of 1.2 mg/(gVSS-h), and the existing biological aerated filter had no actual nitrification ability, resulting in the risk of exceeding the ammonia nitrogen limit specified in the discharge standard in winter. In addition, due to the inhibition of simultaneous chemical phosphorus removal, poor biological phosphorus removal performance was obtained, and the maximum specific anaerobic phosphorus release rate (measured by PO43--P) of activated sludge was at a low level of 0.66 mg/(gVSS-h). The low nitrification rate and short hydraulic retention time were compensated by constructing suspension filler system in the aerobic tank, so as to solve the problems existing in the plant, follow the principle of relying on the existing structures as much as possible, and reduce the project investment and operating costs. The existing biological aerated filter was transformed into a denitrification filter to enhance the nitrogen removal performance of the system, and a new high-efficiency sedimentation tank was built to eliminate the adverse effects of simultaneous chemical phosphorus removal on biological phosphorus removal.
Last Update:
2024-02-01