曝气吹脱法去除水中挥发性有机污染物试验研究

Removal of volatile organic pollutants from water by aeration stripping method

在实验室静态试验条件下,研究了曝气吹脱法对氯乙烯、1,1-二氯乙烯、氯丁二烯等10种挥发性有机物的去除效果。结果表明,在曝气量为0.4～1.4 L/min、气水比不大于25时,能将初始质量浓度为5倍国家标准限值的氯乙烯、1,1-二氯乙烯、氯丁二烯、反式-1,2-二氯乙烯、三氯甲烷、二氯一溴甲烷和二氯甲烷降低至国家标准限值以内;而在相同条件下,曝气吹脱法对1,2-二氯乙烷、一氯二溴甲烷和三溴甲烷的去除效果不理想。

The removal efficiencies of aeration stripping technology on ten kinds of volatile organics, such as vinyl chloride, 1,1-dichloroethylene and chloroprene were investigated under the laboratory static testing condition. The results indicated that the aeration rate was 0.4 to 1.4 L/min, gas- water ratio was lower than 25, the initial concentrations of vinyl chloride, 1, 1-dichloroethylene, ehloroprene, trans-1,2-diehloroethylene, chloroform, bromodichloromethane and diehloromethane which were 5 times of the national limited values, were decreased to below the national standard limited values, the removal efficiencies of 1,2-diehloroethane, dibromochloromethane, bromoform were not satisfied by aeration stripping technology under the same condition.