校园中水站曝气生物滤池的优化应用——以山东师范大学长清校区中水站为例

Optimization applications of BAF in intermediate-water station of campus: A case of reclaimed water station in Changqing campus,Shandong Normal University

通过对实际中水处理工程中曝气生物滤池（BAF）进行调试，得出其最优运行工况参数，对高校污水处理回用工程设计及实际生产运行具有一定的意义和价值。文章对山东师范大学长清校区中水站内曝气生物滤池进行调试分析，通过控制曝气管道上的泄压阀以及进水管道的流量调节阀，改变曝气生物滤池曝气量、进水流量和水力停留时间，阐明气水比及水力停留时间对曝气生物滤池处理效能的影响。结果表明：水温为23-29℃条件时，曝气生物滤池的气水比为（4.0-5.5）：1时，化学需氧量（ CODcr ）去除率可达86.7%-90.1%，固体悬浮物浓度（SS）去除率可达48.4%-64.8%；水力停留时间为3.0-4.0 h时，CODcr去除率可达85.8%-91.3%，而SS去除率可达54.0%-57.7%。

Through the practice of intermediate-water reuse works in the BAF（ biological aerated filter） for debugging, its optimum operating condition parameters were abtained for wastewater treatment,and reuse university has a certain meaning and value with engineering design and actual production run. The paper debugging analyzed the BAF in reclaimed water station of Changqing campus of Shandong Normal University. Changing BAF aeration by controlling the flow valve and pressure relief valve on the water pipe aeration pipes to study impact of gas-water ratio on the processing performance of BAF. In capacity of BAF remains unchanged,change its water flow,thus changing the HRT to study impact of HRT（ Hydraulic retention time）on the processing performance of BAF. The results show that is whar BAF gas-water ratio of 4. 0 to 5. 5：1 range,CODcr（ Chemical oxygen dimand）removal rate is 86. 7% -90. 1%,and SS（Suspended solid）removal efficiency of up to 48 . 4% -64 . 8% under the conditions of temperature of 23-29 ℃. When HRT is 3 . 0 - 4 . 0 h range,CODcr removal rate is 85. 8% -91. 3%,and the removal efficiency of SS is up to 54. 0% -57 . 7 under the conditions of temperature of 23-29 ℃.