生活垃圾沥滤液UASB出水化学沉淀反应中影响总铬去除因素的研究  

Study on the removal factors of total Cr^(6+) in landfill leachate after UASB process by chemical precipitation

作　　者：张俊辉 彭立新 

机构地区：[1]深圳市碧园环保技术有限公司设计部,广东深圳518000

出　　处：《工程建设》2016年第1期74-78,共5页Engineering Construction

摘　　要：以厌氧生化(UASB)处理后的生活垃圾沥滤液为对象,研究了水量负荷、总铬浓度、助凝剂种类、还原剂投加量和混凝剂投加量等参数对化学沉淀法除铬效果的影响。研究结果表明,上述参数对总铬去除率影响的程度为:总铬浓度>混凝剂投加量>助凝剂的种类>进水负荷>还原剂的投加量。优化的参数条件为进水负荷1.0 m3/d、总铬浓度1.5 mg/L,助凝剂选用氢氧化钙,还原剂(焦亚硫酸钠)比例1∶4,絮凝剂添加量700 mg/L,在此条件下生活垃圾沥滤液生化出水中总铬去除率达到90%。Landfill leachate after the anaerobic biochemical treatment（UASB） was used as object in this re- search. The effects of hydraulic loading, total chromium ions concentration, coagulant type, reductant dosage and co- agulant dosage on C6 ＋removal efficiency by using chemical precipitation method were studied. The results show that, the degree of abovementioned influences on removal efficiency is as follows：total chromium ions concentration 〉 coagulant dosage 〉 coagulant type 〉 hydraulic loading 〉 reductant （ Sodium metabisulfite） dosage. The optimized pa- rameters conditions are as follows：hydraulic loading 1.0 m3/d, total chromium ions concentration 1.5 mg/L, coagu- lant NaOH,the reductant ratio 1：4, coagulant dosage 700mg,/L. The removal efficiency of total chromium reaches 90% under the optimum condition.

关 键 词：垃圾沥滤液 去除率 总铬浓度 化学沉淀 螯合 

分 类 号：X703[环境科学与工程—环境工程]