WANGYin,WUJia?li,YAOXiang,et al.Application of Five-stage Bardenpho/Biological Filter in Upgrading and Reconstruction of Oxidation Ditch Process[J].China Water & Wastewater,2022,38(10):74-78.
Application of Five-stage Bardenpho/Biological Filter in Upgrading and Reconstruction of Oxidation Ditch Process
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第10期
Page:
74-78
Column:
Date of publication:
2022-05-17
- Keywords:
- upgrading and reconstruction; oxidation ditch; five-stage Bardenpho; high efficient sedimentation tank; quasi-Ⅳ discharge standard
- Abstract:
- The treatment scale of a wastewater treatment plant (WWTP) in Chengdu is 4×104 m?/d, and the discharge standard needs to be upgraded from the first level A standard to Water Pollutant Discharge Standard for Minjiang River and Tuojiang River Basin in Sichuan Province (DB 51/2311-2016, quasi-Ⅳ surface water limit). The problems existing in the original process were analyzed, which included insufficient nitrogen removal capacity, large amount of carbon source dosage, uneven flow rate of the oxidation ditch and easy deposition of the sludge. The upgrading project transformed the original A2/C oxidation ditch process into a five-stage Bardenpho process in situ, and an advanced treatment process consisting of a high efficient sedimentation tank and a decarburization biological filter was newly-built. After the reconstruction, the effluent quality is better than that of the quasi-Ⅳ surface water limit. The total investment of the upgrading and reconstruction project is 10.012 24 million yuan, and the operating cost is 0.404 yuan/m3.
Last Update:
2022-05-17