上流式曝气生物活性炭滤池用于给水深度处理的启动

利用新型臭氧-炭滤-消毒-砂滤组合净水工艺处理北江微污染原水,研究了上流式曝气生物活性炭滤池的启动情况。试验结果表明,上流式曝气生物活性炭滤池气水体积比为0.2:1,启动20 d后,对氨氮的去除率稳定在79%左右,滤池挂膜成功;采用两段式气水混合反冲洗方式,反冲洗周期3～5 d,可有效控制水头损失,维持滤池稳定运行。上流式曝气生物活性炭滤池启动完成后,试验系统最终出水CODMn、氨氮、亚硝氮、浊度均达到生活饮用水卫生标准(GB 5749-2006)和饮用净水水质标准(CJ 94-2005)。

STARTING RESEARCH ON UP-FLOW AERATED BAC FILTER APPLIED IN WATER ADVANCED

By taking a new process,ozone-BAC filter-disinfection-sand filter for treating the micro-polluted raw water in Beijiang,this study investigated the start-up of up-flow aerated biological activated carbon filter.The results showed that with a gas-water ratio of 0.2:1,mature biofilm was formed in the filter after 20 days,when the removal rate of NH3-N was steadily about 79%.Backwash mode adopted the 2-step air-water combined backwash,with a backwash cycle of 3～5 days,which kept the head loss well controlled and filter running stable.When the filter operated steadily,the CODMn,ammonia nitrogen,nitrite and turbidity could well meet the national standards for the daily drinking water quality(GB 5749-2006)and the clean drinking water quality(CJ 94-2005).