FUDe-yu,XIYin,LIUZhi-yuan,et al.Optimization and Transformation of Processes and Automatic Control Systems in Rural Sewage Treatment Stations and Operation Effects[J].China Water & Wastewater,2025,41(22):105-110.
Optimization and Transformation of Processes and Automatic Control Systems in Rural Sewage Treatment Stations and Operation Effects
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第41卷
Number:
第22期
Page:
105-110
Column:
Date of publication:
2025-11-17
- Keywords:
- rural sewage treatment; automatic control system transformation; process optimization; energy saving and consumption reduction; unattended mode
- Abstract:
- Taking a rural sewage treatment station in Southwest China as the research object, aiming at the automatic control problem of its original single solidification operation mode, the original single pure membrane moving bed biofilm reactor (MBBR) process of the station was transformed into a multi-mode (A2O+AO, A2O+AA or SBR+AO) fixed membrane activated sludge system (IFAS) process, and the influent volume and tank operation quantity, as well as the interlocking automatic control logic of influent quality and treatment process were reconstructed for realizing the automatic switching of the operation mode of the station under different influent conditions. After the transformation, the treatment efficiency and operation stability of the station were significantly improved, and the average concentrations of TP, NH3-N and TN in effluent were 0.25 mg/L, 1.81 mg/L and 10.19 mg/L, respectively, which were far better than the first-class A standard of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002). At the same time, the power consumption cost of per ton sewage, the cost of carbon source and polyaluminum chloride (PAC) were reduced by 20%, 50% and 57.14%, respectively, and the overall operating cost was reduced by 34.53%. The process and automatic control system transformation scheme proposed in this study is particularly suitable for the upgrading and transformation of rural wastewater treatment facilities experiencing significant fluctuations in influent volume and quality, or those requiring unattended operation and regular inspections.
Last Update:
2025-11-17