生物砂滤池对有机物和氨氮的去除

Removal of Organic Matter and NH_3-N by Biological Sand Filter

当在常规工艺前加生物预处理并取消预加氯时,砂滤池就成为生物砂滤池。与普通砂滤池相比其对有机物、氨氮和浊度的去除率都有很大的提高。实验以珠江源水为水源研究了生物砂滤池对高锰酸盐指数、NH3-N、NO2--N和浊度的去除,在实验期间生物砂滤池出水高锰酸盐指数、NH3-N、浊度平均值分别为1.32mg/L、0.098mg/L、0.171NTU,其相对于沉淀池出水的高锰酸盐指数、NH3-N、浊度的平均去除率分别为18.52%、72.93%、64.45%,而砂滤池出水NO2--N几乎检测不出来。滤池进水与出水溶解氧的变化也证明了砂滤池中生物的存在,并且生长状况良好。

Taking water of Pearl River as water source, the removal of CODMn, NH3-N and NO2--N, turbidity by biological sand filter was studied. During the experiment, average effluent CODMn, NH3-N and turbidity was 1.32mg/L, 0.098mg/L and 0.171NTU while average removal efficiency was 18.52%, 72.93% and 64.45% relatively to sedimentation, and NO2--N almost cannot be detected. DO change with water flow in the biological sand filter proved microorganism existed and grew well.