摘要
从污水处理厂运行实践出发,研究了混凝剂对活性污泥活性的直接和间接影响。结果表明:混凝剂对微生物的影响程度:PAC>三价铝盐>三价铁盐,混凝剂用于生化段除磷时,铁盐投加量宜小于20 mg/L,PAC、三价铝盐宜小于10 mg/L。反冲洗污水排入生化系统对微生物无直接的抑制作用,但造成活性污泥中的无机组分比例增加,北区厂VSS/SS由深度处理前的0.65降低至0.54。
Combined with the practical experience of WWTP,the effect degree on microorganism of coagulants is studied and the results show that PACAl3＋Fe^3＋.While coagulants are applied in chemical phosphorus removal in the biological treatment stage,the appropriate dosing proportion of Fe^3＋ is less than 20 mg/L,compared to 10 mg/L of PAC〉 and Al^3＋.〉The wastewater from backwash by filters discharged into biological systems can not inhibit activity of microorganism,but it results in an increase of inorganic components in active sludge.With North WWTP as example,the VSS/SS ratio reduced to 0.54 from 0.65 after coagulants application.
出处
《环境工程》
CAS
CSCD
北大核心
2011年第4期23-25,45,共4页
Environmental Engineering
基金
高新城区水环境质量保障技术与综合示范(2008ZX07313-002)
关键词
化学除磷
混凝剂
耗氧速率
活性污泥
反冲洗污水
chemical phosphorus removal
coagulants
oxygen uptake rate（OUR）
activated sludge
backwash wastewater
