水解酸化池处理农村生活污水的研究

Study on treatment of rural domestic sewage by hydrolytic acidification pool

采用水解酸化池作为预处理单元用于处理农村生活污水,达到对有机污染物去除效果好,而对氮磷去除效果相对差。在水力停留时间分别为12,18,24 h工况下,研究其对污水中各项污染物的去除率。结果表明,水力停留时间从12 h增加到24 h的过程中,水解酸化池对有机污染物,总氮和总磷的去除率趋于上升,平均去除率分别由34.59%,6.50%,12.7%上升到58.89%,14.51%,25.00%,对氨氮的增长率趋于上升,平均增长率从5.63%上升到21.56%。该预处理单元在水力停留时间为12 h,能更大程度的去除有机物,保留氮磷等营养元素,为后续工艺处理后的出水用于农田灌溉创造了条件。

The hydrolysis acidification tank is used as the pretreatment unit to treat rural domestic sewage,which achieves a good removal effect on organic matter,but a relatively poor removal effect on nitrogen and phosphorus.Under the hydraulic retention time of 12,18,24 h,the removal rate of various pollutants in the sewage was studied.The results show that:during the increase of hydraulic retention time from 12 h to 24 h,the removal rates of COD cr,TN and TP by the hydrolytic acidification tank tend to increase,and the average removal rates increased from 34.59%,6.50%,12.7%to 58.89%,respectively,14.51%,25.00%,the growth rate of ammonia nitrogen tends to rise,the average growth rate increased from 5.63%to 21.56%.The preprocessing unit can remove organic matter to a greater extent,retain nutrients such as nitrogen and phosphorus,for the effluent after subsequent processing created conditions for farmland irrigation.