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。
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 NH_3-N can be obtained under the conditions of CODcr and pH in influents of 286~656 mg/L and 7~8 and NH_3-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 m3/h. The removal of CODcr and NH_3-N were 91% and 96.6% respectively. The best thickness of the biofilm was found to be 145 μm.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2005年第3期186-189,共4页
Environmental Pollution & Control