LIUZhiyuan,XIYin,SONGShengnan,et al.Process Renovation and Performance Analysis of a Rural Sewage Treatment Station in Southern China[J].China Water & Wastewater,2026,42(6):129-136.
南方某农村污水处理站工艺改造及效果分析
- Title:
- Process Renovation and Performance Analysis of a Rural Sewage Treatment Station in Southern China
- 摘要:
- 针对南方地区某农村污水处理站面临的排放标准相对较高、进水量和水质波动大、出水稳定达标难的问题，将原纯膜MBBR工艺改造为集成固定生物膜活性污泥（IFAS）工艺，并优化了预处理格栅和二沉池。运行结果表明，改造后与改造前相比，水温为13.4~32.0 ℃时，生化池污泥浓度提升了1~3倍，出水COD、NH3-N、TN和TP均稳定达标，同时处理系统的抗冲击负荷能力显著提升。此外，电耗由1.01 kW·h/m3降至0.81 kW·h/m3，节省约20%。该污水处理站采用的改造技术路线适用于进水波动大且排放标准高的农村污水处理新建及存量改造项目。
- Abstract:
- In response to the challenges faced by a rural sewage treatment station in Southern China, including relatively high discharge standards, significant fluctuations in influent flow and water quality, and difficulties in maintaining stable compliance with effluent requirements, the original pure biofilm MBBR (moving bed biofilm reactor) process was upgraded to an integrated fixed-film activated sludge (IFAS) process. Furthermore, the pre-treatment screen and secondary sedimentation tank were optimised accordingly. The operation results show that the sludge concentration of the biochemical tank has been elevated by 1-3 times, the concentrations of COD, NH3-N, TN and TP in the effluent of the station have all achieved stable compliance,and the shock load resistance of the treatment system has undergone significant enhancement after the renovation when the water temperature is 13.4-32.0 ℃. Subsequent to the renovation, a decline in power consumption from 1.01 kW·h/m3 to 0.81 kW·h/m3 was also observed, signifying a 20% reduction in energy usage. The retrofit technology employed at this site is deemed suitable for both new and stock retrofit projects for rural sewage treatment, where influent fluctuations are high and discharge standards are stringent.
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