ZHU Shi-tai,SHENLi-fen,WANGGuang-hua.Distribution of Influent Quality of Sewage Treatment Plants in Guangzhou City Center[J].China Water & Wastewater,2022,38(19):49-53.
Distribution of Influent Quality of Sewage Treatment Plants in Guangzhou City Center
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第19期
Page:
49-53
Column:
Date of publication:
2022-10-01
- Keywords:
- sewage treatment plant; influent quality; distribution; rainfall
- Abstract:
- To implement the requirements of the three-year action plan for improving the quality and efficiency of urban sewage treatment, understand the collection efficiency of the current sewage system in Guangzhou, and find out the influent quality of the current sewage treatment plant, the characteristics of influent quality and the distribution of BOD5, COD and NH3-N were systematically analyzed based on the actual operational data of 10 urban sewage treatment plants in Guangzhou in 2020. The BOD5, COD and NH3-N in sewage were positively skewed. The median BOD5, COD and NH3-N in downtown were 97.35 mg/L, 175.00 mg/L and 17.60 mg/L, respectively, and they were 139.00 mg/L, 262.00 mg/L and 23.30 mg/L respectively at guarantee rate of 90%. The mean ratio of BOD5 to COD (BOD5/COD) was 0.545, its median was 0.548, and the percentage of BOD5/COD greater than 0.4 was 96.8%, indicating that the biodegradability of the sewage was good. Rainfall had a significant impact on the influent quality and reduced the pollutant reduction efficiency of the sewage treatment plant. Therefore, it is necessary to continue to accelerate the diversion of water and sewage in the combined tunnel and the transformation of the unit to meet the standard, and reduce the effect of rainwater on the collection and treatment efficiency of sewage system, so as to ensure the influent quality of the sewage treatment plant.
Last Update:
2022-10-01