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以饮用水嗅味污染的典型物质土臭素及2-甲基异莰醇作为研究对象,分别考察了水厂常规工艺混凝沉淀、活性炭与不同混凝剂(聚合氯化铝、硫酸铝、氯化铁)强化混凝对嗅味物质的去除效果,并结合UV254、浊度指标考察了3种混凝剂对投加活性炭后水体的净化效果。结果表明,常规工艺对嗅味物质的去除率较低,活性炭强化混凝对土臭素及2-甲基异莰醇的去除率较高,其中对GSM的去除率均达到90%以上,对2-MIB的去除率均达到80%左右,改变活性炭投加量及吸附时间对嗅味物质的去除率影响较大,而改变混凝剂的种类及浓度对嗅味物质的去除率影响不大,3种混凝剂中聚合氯化铝对投炭后水体的净化效果最好。
In this paper, geosmin and 2-methylisoxanthene, typical pollutants of drinking water, were investigated. The effects of coagulation and sedimentation, activated carbon and different coagulants (polyaluminum chloride, aluminum sulfate, Ferric iron) to strengthen the removal of odor substances, and combined with UV254, turbidity indicators investigated three kinds of coagulant on the activated carbon after the water purification effect. The results showed that the removal rate of odorants was lower in the conventional process, and the removal rate of geosmin and 2-methylisoxanthene by activated carbon was higher, and the removal rate of GSM was more than 90% -MIB removal rate of about 80%, changing the amount of activated carbon and the adsorption time on the removal of odor substances have a greater impact, and change the type and concentration of coagulant odor removal of substances has little effect, The polyaluminum chloride in the three kinds of coagulants has the best purification effect on the water body after the carbonization.