The combined drainage system has the advantages of less investment,short con-struction period,quick results,but it can also easily lead to high water level operation of the sew-age system,which backfire the safety of the downstream drainage system,causing sewage over-flow into the river during the dry season to pollute the water environment,and waterlogging during the rainy season to affect water security.By studying the water level change of the sewage pumping station inlet pipe,the reason for the prominent pollution and waterlogging contradiction in Area D was identified.After taking fusion measures to build an independent drainage area,the water level of the drainage system was reduced by more than 1.6m,and the number of sluice openings was re-duced from 83 times/a to 17 times/a,and the amount of COD into the river was reduced by 248.4 t/a,and ammonia nitrogen was reduced by 19.7 t/a,which guaranteed that the water quality of the river reached Class Ⅴ.
关键词
污水系统/熔断/降水位/污涝同治
Key words
Sewage system/Fusion/Water level reduction/Co-treatment pollution and water-logging
维普
万方数据