RESEARCH ON OPERATIONAL EFFICIENCY AND MECHANISM OF RAPID FILTRATION PROCESS FOR OVERFLOW SEWAGE
The high density of urban construction in China determines that the treatment of overflow sewage should adopt rapid treatment technology with less land occupation.This study constructs an overflow sewage treatment process with rapid filtration as the core,investigates the influence of factors such as filter material type,filtration speed,and filling amount on the filtration effect,and studies the reasons for the differences in filtration effects of different filtration materials based on material characterization and mechanism analysis.The results showed that both polyester fiber balls and hydrophilic polyurethane sponge exhibited good and stable filtration effects at filtration speeds of 20 m/h and 40 m/h,while polypropylene PP cotton only had good and stable filtration effects at filtration speeds of 20 m/h.Under the condition of a 150％filling amount,all three filter medias showed good filtration effect.The removal of pollutants depends entirely on the removal of suspended solids,therefore filtration performance is equivalent to suspended solids removal performance.In the pilot experiment,polyester fiber balls were used as the main filter material,and under a filtration rate of 40 m/h,the average removal rates of COD and SS were 47.98％and 82.37％,respectively.Provide reference for the application of mature polymer elastic materials as filter material combined with rapid filtration technology in overflow wastewater treatment related research.
万方数据
维普
