混凝和化学沉淀法联合处理垃圾渗滤液  

Treatment of Landfill Leachate by Flocculant and Chemical Precipitation Process

作　　者：李亚峰[1] 吕春华[1] 陈萍[1] 朱爱霞[1] 

机构地区：[1]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2007年第2期280-283,共4页Journal of Shenyang Jianzhu University：Natural Science

基　　金：辽宁省教育厅攻关项目(2004D081)

摘　　要：目的通过用混凝和化学沉淀法联合对垃圾渗滤液进行的预处理来确定出最佳工艺条件.方法通过投加混凝剂和絮凝剂对垃圾渗滤液进行混凝沉淀实验,将处理后的渗滤液再投加沉淀剂,分别以CODCr和氨氮为考察指标,根据单因素和正交实验确定实验条件.结果实验表明,混凝和化学沉淀法联合处理对垃圾渗滤液的CODCr和氨氮具有良好的去除效果,实验条件为:混凝剂(PAC)的投量为1 000 mg/L,絮凝剂(PAM)的投量为3.5 mg/L,在pH值为5.5左右进行混凝,然后对经过沉淀的上清液调节其pH值为8.5,按Mg2+、NH4+和PO43+物质的量之比为1:1:1投加沉淀剂,静置沉淀.结论对垃圾渗滤液的CODCr和氨氮的去除率分别达到52.5%和81%以上.经处理后的废水BOD5/COD值为0.63,氨氮含量为76 mg/L,降低后续生物处理负荷.The experiment researches into the technique which mixes the flocculation and chemical precipitation methods to dispose landfill leachate, and ascertain the best reaction condition. By adding flocculant into landfill leachate, and adding precipitator into the disposed landfill leachate, mensurating the CODcr and Am- monia nitrogen standards and doing single-factor experiment, the reaction conditions are ascertained. The experimental results indicate that the COD and ammonia are removed effectively, and the removal rates of COD and ammonia are 52.5 % and 81%, respectively. After the treatment, the ratio of BOD5/COD reached 0.63 and the content of ammonia was 76 mg/L, which exhibited excellent biodegradability.

关 键 词：垃圾渗滤液 混凝与化学沉淀 磷酸铵镁 反应条件 

分 类 号：X703[环境科学与工程—环境工程]