GAOWei-nan,TIANMeng,LIWei,et al.Discussion on Design of Wastewater Treatment Plant with High Concentration Wastewater in a Long?term Low Temperature Region[J].China Water & Wastewater,2025,41(4):62-68.
Discussion on Design of Wastewater Treatment Plant with High Concentration Wastewater in a Long?term Low Temperature Region
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第41卷
Number:
第4期
Page:
62-68
Column:
Date of publication:
2025-02-17
- Keywords:
- wastewater treatment plant; severe cold region; multi-stage A2/O; ultrafiltration membrane; denitrifying deep bed filter; hydrolytic acidification; BioWin software
- Abstract:
- To alleviate the pressure of regional wastewater treatment, a new wastewater treatment plant with a design capacity of 2.0×104 m3/d was built in a severe cold region, and the effluent quality need to meet the first level A limit specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002). Confronted with the challenges of long-term low temperatures, elevated influent concentrations, and stringent effluent stability requirements for reuse, the wastewater treatment plant implemented a process comprising hydrolytic acidification, multi-stage A2/O bioreactor, secondary sedimentation tank, coagulation-sedimentation tank, denitrifying deep bed filter, and ultrafiltration to meet the discharge standard and achieve consistent reuse of wastewater. By establishing crossover conditions for the hydrolytic acidification unit and the ultrafiltration unit, the operational flexibility of the wastewater treatment plant was enhanced, leading to a reduction in operating costs. After the combined process treatment, each effluent parameter consistently met the discharge standard. The operational performance remained effective even in winter, and the ultrafiltration remained inactive for the majority of the time. The total estimated investment for the project is approximately 274.932 million yuan, with a unit wastewater treatment cost of 5.28 yuan/m3. The process route and measures outlined can serve as a reference for similar engineering design.
Last Update:
2025-02-17