Analysis Of The Causes Of Problems In The Central Urban Area Sewage Collection System In Chao Lake City And Countermeasures

Chao Lake cential city area has14.36km2, sewage system in the downtown collection range includes4areas:Chengdong area, The Old Town area, JiaTang new polder area and Guanwei area. Sewage treatment plant in Chao Lake city services mainly for industrial and domestic wastewater treatment in the central zone in Chao Lake city, size60000m3/d. official test run of wastewater treatment factory from September2003, in Chao Lake city, try running out of water20000m3/d, running the initial water weight is only about half the actual sewage water in the central zone, simultaneous intake of COD, BOD5are lower than the design value, which differs from the COD150-275%different from50-256%,BOD5. Visible, Chao Lake city sewage treatment plant run early, low water, severe shortage of carbon and carbon-phosphorus ratio, low carbon-nitrogen ratio:BOD5/N about2,BOD5/P about16.5per cent for nitrogen and phosphorus removal, especially phosphorus removal difficult.By collecting information、site survey and site detection, the problems of Chao Lake center city sewage collection system had been identified, as community and the street of support tube construction still not enough;the phenomenon of sewage directly flowing into Tian River exists in part of old residentials in Guanwei area, the waste water of car-washing and restaurant make the main pollution of the rivers; old groundwater and surface water leakage serious; septic tank unregularly maintenance causes not only plug and spill problem, but also serious river pollution.Within CCTV and Quickview technology, selecting enlistment-age long, heavy-load,and security-coefficient highly pipeline in the old city zone、Tianhe Road of closure dry tube and the JiaTang new polder area and health West Road of shunt system pipeline for has site detection, found pipeline defects category main has connector leakage, and deformation, and rupture, and sedimentation, and scaling, and obstructions, and surface water and the groundwater leakage,, and reference in China Shanghai and the Guangzhou of pipeline detection standard, combination Chao Lake Center City of reality.Defect levels for the calculation and assessment of the pipeline, determine the fix model segment.Through comprehensive analysis and research, propose countermeasures and suggestions to improve Chao Lake central city area’s sewer collection and effective wastewater treatment factory’s operation.