GAOChen-chen,SUNYong-li,MUYing,et al.Deposition and Attenuation Law of Pollutants in Urban Residential Domestic Sewage and Its Impact[J].China Water & Wastewater,2023,39(3):67-72.
Deposition and Attenuation Law of Pollutants in Urban Residential Domestic Sewage and Its Impact
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第3期
Page:
67-72
Column:
Date of publication:
2023-02-01
- Keywords:
- domestic sewage pollution; sewage sewer network; deposition and attenuation; pollutant collection amount; influent concentration; quality and efficiency improvement
- Abstract:
- The flow velocity of urban sewage sewer network is an important factor affecting the efficiency of pollutant collection and treatment. To analyze the influence of deposition on sewage transportation in the sewer system, this paper investigated the deposition and attenuation law of pollutants in domestic sewage discharged from residential sources under unfavorable flow conditions.According to the transportation distance, the deposition time was 10 hours. The concentrations of SS, COD and TP in sewage decreased by 61.1%, 18.2% and 9.3%, respectively, while NH3-N concentration increased by 8.7%. As a result, the COD/TN, COD/NH3-N, COD/TP and COD/PO43--P decreased by 19.9%, 24.8%, 11.9% and 18.0%, respectively. Therefore, the deposition of pollutants in the sewage transportation process was an important cause for the low influent concentration and imbalance of C/N ratio in the sewage treatment plant. It is suggested to fully consider the comprehensive influence of sewer network operating conditions on the collection and treatment efficiency of pollutants.
Last Update:
2023-02-01