PENG Zhao-xu,LIUAo,LI Ting-mei,et al.Simulation of Organics Degradation Law in Pipe Network from the Perspective of Plant-Network Integration[J].China Water & Wastewater,2022,38(8):52-59.
Simulation of Organics Degradation Law in Pipe Network from the Perspective of Plant-Network Integration
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第8期
Page:
52-59
Column:
Date of publication:
2022-04-17
- Keywords:
- sewage quality model; plant-network integration; sewage network; COD
- Abstract:
- To improve the utilization efficiency of organics in an integrated plant-network system, a model for predicting COD variation in pipe network based on degradation-sedimentation-flushing was established, and the contribution law of pipe network and sewage treatment plant to COD removal was investigated. When the pipe network was not affected by rainfall, overall profile of COD in the pipe showed a downward trend, the contribution rate of the pipe network to COD removal was 15.91%, and ΔCOD was positively correlated with HRT(correlation coefficient of 0.865). The specific power consumption of COD removal increased with the decrease of the influent COD（correlation coefficient of -0.862）. From the perspective of effectively using COD to improve nitrogen and phosphorus removal in sewage treatment plants, the construction of decentralized sewage treatment plant and the selection of separate drainage system are effective ways to shorten the residence time of sewage in pipes and improve the influent COD of sewage treatment plants.
Last Update:
2022-04-17