复合填料曝气生物滤池净化校园化粪池出水中的营养盐

Removing Nutrients from Septic Tank Effluent by Using a Biological Aerator Filter with Hybrid Carriers

以校园化粪池出水为处理对象,对比研究了2组不同填料的平行曝气生物滤池(BAF)的净化效果和特性.试验结果表明:两组平行的BAF均能有效去除水体中的营养盐(N,P);竹丝和凹土陶粒复合填料BAF氨氮、总氮、总磷平均去除率达到89.5%、90.5%、93.7%,而竹丝基质填料BAF平均去除率为78.7%、81.8%、84.4%.可能存在的原因是:1)复合填料具有更加复杂的表面孔隙系统造就更为复杂的微生物体系;2)竹丝填料使用过程中降解减少,微生物量在一定程度上比复合填料减少.

A comparative study has done on the purification efficacy and characteristics of two parallel biological aerator filters（BAFs）from campus septic tank effluent.The experimental results indicated that both of the two parallel biological aerated filter（BAF）could remove nutriuents（N and P）from septic tank effluent effectively,and the NH4＋-N,TN and TP removal rate of one biological aerator filter（BAF）with two hybrid carriers reached 89.5%、90.5%、93.7%,while the corresponding removal rate was only78.7%、81.8%、84.4% by using one biological aerator filter（BAF）with one carrier.The mechanisms involved that：1）the more complex biological system was created by a complex surface pore structure on hybrid carriers;2）filamentous bamboo could be decomposed during the experiment and some microorganisms were reduced to a certain degree.