QIAOXiao-juan,WANGYin,FUYi-kai,et al.Process Design and Operation Analysis of the Upgrading and Renovation of a WWTP[J].China Water & Wastewater,2025,41(4):113-118.
Process Design and Operation Analysis of the Upgrading and Renovation of a WWTP
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第41卷
Number:
第4期
Page:
113-118
Column:
Date of publication:
2025-02-17
- Abstract:
- A wastewater treatment plant (WWTP) in Sichuan Province was upgraded and expanded in 2018 to increase the capacity from 5×104 m3/d to 10×104 m3/d. The effluent quality has been improved from the first level B criteria in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002) to the local Discharge Standard of Water Pollutants in Minjiang and Tuojiang River Basin (DB 51/2311-2016). The upgraded and expanded WWTP has complex process and low automatic control level. After two years of operation, the denitrifying biofilter and MBR membrane tank are abnormal. In early 2021, a series of measures were taken to realize the normal operation of the denitrifying biofilter and MBR membrane tank. After in-depth analysis of the renovation scheme, operation parameters and restoration measures of the WWTP, it is concluded that CN filter has low utilization rate of carbon source in sewage; the economic efficiency of mixing DN filter effluent with A/A/O effluent into MBR membrane tank is poor. Perfect automatic cleaning system is of great importance to DN filter and MBR membrane tank.
Last Update:
2025-02-17