CUITian-huai,CHENGJun,YANGKun.Design of a Wastewater Treatment Plant Expanded and Reconstructed from CASS Process to Bardenpho Process without Shutdown[J].China Water & Wastewater,2023,39(12):85-89.
Design of a Wastewater Treatment Plant Expanded and Reconstructed from CASS Process to Bardenpho Process without Shutdown
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第12期
Page:
85-89
Column:
Date of publication:
2023-06-17
- Abstract:
- Hanjiang River basin is an important water conservation area for the middle route project of South-to-North Water Diversion Project. With the continuous promotion of water pollution prevention and control in the basin and the continuous improvement of sewage network, the operation of a county wastewater treatment plant in Shaanxi Province is overloaded, and the effluent quality cannot meet the discharge standards stably. Therefore, the wastewater treatment plant is in urgent need of expansion and reconstruction. In the case of land limitation and continuous operation requirement, the CASS process was transformed into a five-stage Bardenpho process in situ in the expansion and reconstruction project, and the technical route of transformation without shutdown was proposed. The scale of the wastewater treatment plant was increased from 1×104 m3/d to 2.3×104 m3/d after expansion. Compared with CASS process, the average COD, NH4+-N and TN in effluent were reduced by 28.4%, 76.4% and 29.2%, respectively, and the dosages of carbon source and phosphorus removal agent were reduced by approximately 40% and 60%, respectively. The effluent quality reached and was better than the first level A limit specified in the discharge standard. The total cost of sewage treatment was approximately 1.48 yuan/m3, the operating cost was 0.87 yuan/m3. The project made full use of the original civil construction facilities of CASS tank, effectively saved the investment and operating cost, and showed good economic and technological advantages.
Last Update:
2023-06-17