基于不同滤料的生物滤池处理污染湖水的研究

在水温为16～22℃、水力负荷为5m3/（m2.h）、气水比为1.5：1的条件下,对比了陶粒和2种不同粒径的活性炭、石英砂滤料的下向流生物滤池处理受污染湖水的效果。结果表明,活性炭滤池对CODMn、NH4＋-N和TN的去除效果优于石英砂滤池和陶粒滤池,且小粒径的活性炭滤池的除污效果优于大粒径活性炭滤池,小粒径炭滤池对浊度、CODMn、NH4＋-N和TN的平均去除率分别为84.45%、36.82%、84.55%和10.19%;石英砂滤池对浊度的去除效果优于活性炭滤池和陶粒滤池,且粒径小的优于粒径大的,小粒径砂滤池对浊度、CODMn、NH4＋-N和TN的平均去除率分别为87.91%、32.43%、78.25%和8.46%;陶粒滤料粒径大,除浊效果较差,其对浊度、CODMn、NH4＋-N和TN的平均去除率分别为75.63%、35.79%、80.06%和8.85%。

Study on different filter media bio-filter for polluted lake-water treatment

When the water temperature was 16~22℃,the hydraulic load was 5 m3/（m2·h） and the air-water ratio was 1.5：1,the pollutants removal effects of the polluted lake water through the down-flow biological filter with the ceramisite,the activated carbon of 2 different particle sizes and the quartz of 2 different particle sizes were compared.The results show that the removal of CODMn,NH4＋-N and TN by activated carbon filters were higher than quartz sand filters and ceramsite filter,and the purification efficiency of small particle filter was higher than that of the large particle filter.The average removal rates of turbidity,CODMn,NH4＋-N and TN by small particle activated carbon filter were 84.45%,36.82%,84.55% and 10.19%,respectively.The turbidity removal by quartz sand filters was better than activated carbon filter and ceramsite filter,and the removal efficiency of small particle was better than that of the large particle filter.The average removal rates of turbidity,CODMn,NH4＋-N and TN by small particle quartz sand filter were 87.91%,32.43%,78.25% and 8.46%,respectively.For the large particle diameter,ceramsite filter had lower turbidity removal,and the average removal rates on turbidity,CODMn,NH4＋-N and TN were75.63%,35.79%,80.06% and 8.85%,respectively.