混凝—气浮工艺处理有机物污染地下水现场中试试验

对某农药厂原厂区的有机污染地下水的水质特征进行了分析，采用小试确定了药剂投加量，并采用中试装置考察了混凝—气浮工艺的去除效果。小试结果表明，聚合氯化铝（PAC）的最佳投加量为300 mg/L，聚丙烯酰胺（PAM）的最佳投加量为3 mg/L。中试运行结果表明，当进水流量为0.25 ~1.00 m3/h时，对浊度的去除率为82.66%~90.13%，对悬浮固体的去除率为80.12%~90.11%；碳原子数在10~28范围内的石油烃的平均去除率为38.96%~51.46%；1，2-二氯乙烷、2-甲基萘、苯、萘、甲苯、邻苯二甲酸二甲酯的平均去除率分别为17.76%，67.49%，48.70%，54.56%，37.24%，62.53%。

Field pilot test for treatment of organic contaminated groundwater by coagulation-dissolved air flotation（DAF） process

The water quality characteristics of the organic contaminated groundwater in original area of a pesticide factory were analyzed. The agent dosage was determined by laboratory experiment，and the removal effects of coagulation-dissolved air flotation（DAF） process was investigated in a pilot plant. The results of laboratory experiment showed that the optimum dosage of polyaluminium chloride（PAC） and polyacrylamide（PAM） was 300 mg/L and 3 mg/L，respectively. The results of pilot scale test showed that the removal rate of turbidity and SS was 82.66%-90.13% and 80.12%-90.11% when the influent flow was 0.25-1.00 m3/h；The average removal rate of petroleum hydrocarbons C10-C28 was 38.96%-51.46%；The average removal rate of 1，2-dichloroethane，2-methylnaphthalene，benzene，naphthalene，methylbenzene and dimethyl phthalate was 17.76%，67.49%，48.70%，54.56%，37.24%，62.53%，respectively.