LI Peng-feng,SUI Ke-jian,LI Jia-ju,et al.Several Problems of Broken Kitchen Waste into Municipal Sewage Pipe Network[J].China Water & Wastewater,2020,36(16 16):35-39.
Several Problems of Broken Kitchen Waste into Municipal Sewage Pipe Network
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
16 16
Page:
35-39
Column:
Date of publication:
2020-08-17
- Keywords:
- broken kitchen waste; municipal pipe network; optimal precipitation time; critical velocity
- Abstract:
- To detemine the feasibility of broken kitchen waste draining into the municipal sewage pipe network, the conventional indicators detection, static settling test, pipeline flow simulation test and other research of the broken kitchen waste were carried out. The conventional index of broken kitchen waste showed that its COD ∶TN ∶TP was about 200 ∶4.5 ∶1.The static settling test showed that the broken kitchen waste was divided into grease layer, supernatant layer, suspended layer and sedimentary layer, the proportion was 5%, 40%-60%, 20%-30%, 10%, respectively, and the optimal static settling time of broken kitchen waste was 5 h. The simulation verified that the critical flow rate of broken kitchen waste flowing in the pipe was 0.21 m/s, which was less than 0.6 m/s required by outdoor drainage specification, and the broken kitchen waste would not be deposited in the sewage pipe in theory. Based on the above test results and the structural and functional defects of the municipal drainage pipe network in China, the potential influence, implementation advantages and difficulties of the broken kitchen waste into the municipal sewage pipe network were discussed. The research showed that the conditions for implementing the broken kitchen waste into the municipal pipe network are not mature enough under the conditions of the current state pipe network in China, which should be carefully considered.
Last Update:
2020-08-17