【摘要】 采用三相外循环生物流化床处理生活污水。该设备包含好氧区和缺氧区,可获得足够的停留时间造成缺氧条件,能保证有效去除NH3N。实验在室温下进行,进水条件pH为7～8,CODCr为286～656mg/L,NH3N为10～51mg/L。结果显示,控制水力停留时间在3h为宜,最佳通气量为0.09m3/h,此时CODCr和NH3N的去除率分别达91%和96.6%,有较好的处理效果。同时实验确定了最佳膜厚为145μm。更多还原

【Abstract】 An innovative apparatus-external circulating three-phase biological fluidized bed was used to treat an organic wastewater. This apparatus includes both aerobic zone and anoxic zone. As it has enough retention time for anoxia process, a satisfactory removal of NH₃-N can be obtained under the conditions of CODcr and pH in influents of 286～656 mg/L and 7⁸ and NH₃-N of 10～51 mg/L at room temperature. The influence of the process parameter of apparatus on the treatment was studied. The results showed that the optimum conditions were HRT 3 h and ventilation quantity 0.09 m3/h. The removal of CODcr and NH₃-N were 91% and 96.6% respectively. The best thickness of the biofilm was found to be 145 μm.更多还原