接触沉淀-BAF工艺在城市污水再生回用处理中的应用

按照接触沉淀池的结构参数对BAF反应器进行改造后,进行城市污水再生回用试验研究.结果表明,当控制气水比为1.5∶1~2.5∶1、水力负荷为1.0~2.0 m3/(m2.h)时,接触沉淀-BAF反应器具有良好的接触沉淀性能,浊度平均去除率可达92%;反应器内存在同步硝化-反硝化过程,具有良好的脱氮性能,出水NH3—N≤5 mg/L,TN<15 mg/L.在进水水质控制良好的前提下,反应器出水水质均可达到国家标准中城市绿化、道路清扫及建筑施工等城市杂用水水质要求.

Application of Contacted Sedimentation - BAF Technique into Recycled Reuse Disposal of Urban Waste Water

Experimental study is made on the recycle of urban waste water after the alteration of BAF reactor according to the structural parameters of contacted sedimentation pool.The result shows that the contacted sedimentation-BAF reactor has superior quality of contacted sedimentation and the average turbidity removal ratio can get 92%,when the air/water ratio is controlled as 1.5∶1-2.5∶1,with the water pressure 1.0 m3/(m2·h),and at the same time,the denirtriding effect is better than that of BAF reactor,with NH_3—N≤5 mg/L,TN<15 mg/L in outflow water.Under the condition of controlling the inflow water quality at better level,the outflow water quality can satisfy the urban miscellaneous use needs of urban forestation,street clearing,construction use.