活性滤料滤池过滤性能研究

为了研究进水浓度、水力停留时间和供气量对活性滤料滤池过滤性能的影响,以石英砂作为过滤介质,以高岭土悬浊液模拟配水进行试验,测试不同条件下滤池对SS的去除效果.结果表明:有效过滤高度为700 mm的活性滤料滤池在HRT为10 min、SS为45 mg·L^-1左右时,砂循环周期应为24 h以内;进水SS的浓度和供气量基本不影响活性滤料滤池的过滤性能;随着停留时间的增加,活性滤料滤池对SS去除率逐渐增加;活性滤料滤池用于出水SS由一级B标准提高到一级A标准的合理停留时间应为7.5~10 min,最佳供气范围为7.96~26.53 L·m^-2·min^-1.

Filtration performance of active medium filter

In order to study the influences of influent concentration, hydraulic retention time (HRT) and air flow on the filtering performance of active medium filter, a series of performance experiment schemes were designed, with the siliceous sand (SS) as lifting medium and the suspending liquid of kaolin as the target, to analyze the removal efficiency of SS under different conditions. The results showed that the cyclic period of sand was within 24 h while the height of the bed was 700 mm and HRT=10 min & SS=45 mg·L^-1. Influent concentration and air flow didn't affect the filtering performance of active medium filter, with the increase of the HRT, the removal efficiency of SS increased gradually. While active medium filter used for upgrade and reconstruction of SS from Standard B to Standard A, the reasonable HRT was 7.5~10 min and the optimal air flow range was 7.96~26.53 L·m^-2·min^-1.