【摘要】 采用浸没式膜生物反应器(MBR)处理医院污水,实际运行效果表明,MBR工艺对COD、氨氮、微生物及浊度均具有较高的去除率。膜出水COD和氨氮的平均浓度分别为17.3、0.93mg/L,平均去除率分别为85.1%和97.9%;MBR对菌落总数、总大肠菌群和粪大肠菌群的平均对数去除率分别为2.2、3.7、4.5,膜出水再经二氧化氯消毒后,对菌落总数的平均对数去除率为3.5,总大肠菌群和粪大肠菌群未检出;正常运行期间,MBR出水浊度平均为0.67 NTU。MBR工艺出水无色、无味,主要水质指标均能满足《医疗机构水污染物排放标准》(GB 18466—2005)的要求。该工艺操作简单、运行稳定、占地面积小、排泥少并且对微生物的去除率高,适用于医院类污水的处理。更多还原

【Abstract】 An immersed membrane bioreactor(MBR) was used to treat hospital wastewater.High removal rates of COD,ammonia nitrogen,microorganisms and turbidity were achieved in the MBR.The average effluent concentrations of COD and ammonia nitrogen were 17.3 mg/L and 0.93 mg/L;the corresponding removal rates were 85.1% and 97.9%,respectively.The average logarithmic removal rates of the total bacteria,total coliform and fecal coliform were 2.2,3.7 and 4.5,respectively.After the effluent was disinfected by chlorine dioxide,the average logarithmic removal rate of total bacteria reached 3.5.Total coliform and fecal coliform were not detected in the effluent.During normal operation,the average effluent turbidity was 0.67 NTU.The effluent of MBR was colorless and odorless.The main indexes could meet the requirements of Discharge Standard of Water Pollutants for Medical Organization(GB 18466-2005).The MBR is characterized by simple and stable operation,a small footprint,low sludge discharge and high removal rate of microorganisms.Therefore,the immersed MBR is suitable for hospital wastewater treatment.更多还原