扩展流好气滤池提高再生水水质的试验研究

Study on emanative flow aerobic biofilter enhancing renovated water quality

为开发大规模、高效率的污水再生技术,通过扩展流与均匀流好气滤池的对照试验,论证了扩展流好气滤池作为深圳特区污水再生主导工艺的可行性.扩展流滤池较均匀流滤池启动挂膜快、运行中容积负荷高、再生水质好,而且反冲时间短、反冲后滤床恢复速度快.试验结果表明,扩展流滤池最高运行滤速可达12m/h,CODcr去除率达35%～50%,BOD5去除率达45%～65%,SS去除率达75%～90%,NH4+-N硝化率达60%～70%,出水满足特区再生水系统规划推荐水质标准.

In order to develop efficient and large-scale waste water reuse technology, the contrast experiment between the emanative flow and uniform flow aerobic biofilters was adopted. That is the secondary effluent was respectively renovated by emanative flow and uniform flow aerobic biofilter. From the contrast results, it could be founded that the performances of the set-up period, the filtration operation and backwash process of the emanative flow aerobic filter were all superior to those of the uniform flow aerobic biofilter. The experimental results showed that the ultimate filtering velocity of emanative flow aerobic biofilter was 12 m/h, and the removal of COD was 35%-50%, BOD5 was 45%-65%, SS was 75%-90% and NH5+-N was 60%-70% and the effluent quality could meet the recommendatory renovated water quality of Sweeping Plan of Wastewater Reuse in Shenzhen Special Economic Zone.