新型填料曝气生物滤池去除氮化合物的效果

Nitrogen Removal by Biological Aerated Filter Using Hollow Fiber Membrane as Carrier

采用聚丙烯腈中空纤维膜段作为上流式曝气生物滤池的填料,就系统启动期间生物膜的形成以及对生活污水中氮化合物的去除规律进行了研究,并考察了稳定运行阶段的气水比、水力停留时间等对硝化和反硝化的影响。试验发现:在载体的外表面进行硝化反应的同时,其内部还发生了反硝化反应;中空纤维膜段的形状结构和表面特点使其适宜作为生物膜的载体。

Using polyacrylonitrile hollow fiber membrane as carriers in up-flow biological aerated filter, the biofilm formation during start-up and the removal of nitrogen compounds from domestic sewage were studied. The influence of gas to liquid ratio, hydraulic retention time and other parameters in the stable stage on nitrification and denitrification was investigated. It is found that the denitrification happens inside the carriers and the simultaneous nitrification outside the carriers is performed. With its surface and shape characteristics, this kind of hollow fiber membrane can be used as biofilm carrier.