GAOSong,HEWei,XUWei,et al.Demonstration for Application of Denitrifying Phosphorus Removal Process in Rural Domestic Sewage Treatment[J].China Water & Wastewater,2023,39(14):114-119.
Demonstration for Application of Denitrifying Phosphorus Removal Process in Rural Domestic Sewage Treatment
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第14期
Page:
114-119
Column:
Date of publication:
2023-07-17
- Keywords:
- ural domestic sewage; nitrogen and phosphorus removal; SBR; double sludge denitrifying phosphorus removal; biological contact oxidation; utilization of carbon source
- Abstract:
- The low-C/N ratio of rural domestic sewage limits the treatment effect of traditional biological nitrogen and phosphorus removal process. In actual operation, a large amount of carbon sources are often added, which leads to an increase in treatment cost. Denitrifying phosphorus removal technology has outstanding technical advantages in the treatment of low C/N domestic sewage, but the existing denitrification phosphorus removal processes are difficult to be applied in rural areas due to their complexity. To solve this problem, a denitrifying phosphorus removal process with simple structure, high degree of automation and good controllability was designed by combining SBR and biological contact oxidation (BCO), and applied in rural domestic sewage treatment engineering located in a village of Changzhou. The reaction time of anaerobic stage, anoxic stage and aeration stage of SBR was 3 h, 3 h and 1 h respectively, and the hydraulic retention time of BCO unit was 4.6 h. The operation results show that this process was effective on contaminants removals, with the average removal rates of COD, NH4+-N, TN and TP being 83.0%, 92.5%, 60.5% and 85.1%, respectively. The water quality of the effluent met first level A criteria specified in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant ( GB 18918-2002).
Last Update:
2023-07-17