曝气生物滤池不同水质挂膜的实验研究

The experimental study on biofilm growing of Biological Aerated Filter with different raw water

合适的挂膜方法对曝气生物滤池的快速启动和稳定运行具有重要意义。开展了不同原水条件下的挂膜启动和不同挂膜方法的对比实验。主要通过滤柱对COD指标的去除情况,以及滤料上生物膜的生物相镜检对比分析,找到适合处理污水厂二级出水的挂膜启动方法。实验结果表明,使用污水厂混合进水和生活污水启动挂膜速度要明显优于采用二沉池出水启动挂膜,但采用二沉池出水启动挂膜后滤料表面生物膜更稳定,在实际运行中更加合适。

Appropriate biofilm growing method has the important meaning to fast start-up and the steady operation of the Biological Aerated Filter（BAF）.The tests were compared by the different raw water conditions and different start-up methods.Mainly through COD removal rate,as well as contrastest analysis of the biofacies microscopic exam of the biofilm on the media of BAFs,found the appropriate start-up method for the secondary clarifier effluent of sewage factory.The test results indicated that the start-up by the mixed sewage and the sanitary sewage is quicker than by the secondary clarifier effluent.But the biofilm formed by the secondary clarifier effluent is more stable with effective operation.This is more appropriate in the actual movement.