【摘要】 在一体式膜生物反应器(MBR)中加入组合填料,对北京某国际公寓的生活污水处理进行了生产性试验。试验表明,在进水水温15～22℃,pH值6.5～7.2,曝气气水体积比9～10∶1,COD198.6～563.5 mg/L,NH+4-N20.5～55.3 mg/L,反应器中混合液悬浮固体浓度(MLSS)维持在5200～7800 mg/L时,MBR对水中的COD、NH4+-N平均去除率分别为90.6%、68.7%,出水中检测不出SS和大肠菌群,浊度小于1NTU,水质满足CJ2511-89《生活杂用水水质标准》。在相同条件下,未加填料反应器MLSS平均值必须维持在12000mg/L以上时才能达到类似处理效果。由于反应器中加入组合填料,降低了MLSS的浓度,减少了膜污染,在膜通量不变情况下,化学清洗周期可延长35～40d。更多还原

【Abstract】 scale-producing test was carried out for treating domestic wastewater by membrane bioreactor,which was packed with hybrid media.Under the condition of the influent temperature15～22 ℃,pH 6.5～7.2,aeration with volume ratio of air to water,9～10:1,COD 198.6～563.5mg/L,NH+4-N 20.5～55.3mg/L;mixture liquid suspended solid(MLSS) of 5200～7800 mg/ L,the reactor can effectively remove the pollutants and the average removal rate of COD ?NH3-N was 90.6%,68.7% respectively.Both SS and coliforms were below the detection limits in the permeate of membrane,and the turbidity was less than 1 NTU.The effluent meets the Miscellaneous Domestic Water Quality Standard(CJ 2511-89).更多还原