臭氧-活性炭深度处理在饮用水厂除嗅的应用

Application of ozone-activated carbon advanced treatment in removing odor in drinking water plants

常规饮用水处理技术在水体嗅味问题处理中能力有限,研究分别采用活性炭吸附和臭氧氧化对水中土臭素、二甲基异莰醇、异佛尔酮、紫罗兰酮、柠檬醛等嗅味污染物进行实验。结果表明,在400 mg/L活性炭投加量下,去除效果依次为柠檬醛>土臭素>二甲基异莰醇>紫罗兰酮>异佛尔酮,去除率均在80.00%以上。在1 mg/L臭氧氧化条件下,去除效果依次为柠檬醛>异佛尔酮>紫罗兰酮>土臭素>二甲基异莰醇。将两种工艺应用到现场,在黄河下游某水厂改造新增臭氧-活性炭深度处理工艺,通过对不同工艺阶段以及常规水处理进行取样检测,分析有机污染物浓度和CODCr的变化情况。

Conventional drinking water treatment technology has limited capacity in dealing with water odor problems.Experiments were conducted using activated carbon adsorption and ozonation to remove odor pollutants such as geosmin,dimethyl isobutyl ketone,isophorone,ionone,and citral in water.The results showed that at a dosage of 400 mg/L activated carbon,the removal effect was in the order of citral>geosmin>dimethyl isobutyl ketone>ionone>isophorone,with removal rates of over 80.00%.Under the condition of 1 mg/L ozonated oxidation,the removal effect was in the order of citral>isophorone>ionone>geosmin>dimethyl isobutyl ketone.Applying two processes to the site,a water treatment plant in the lower reaches of the Yellow River was retrofitted with an additional ozone-activated carbon advanced treatment process.Through sampling and testing at different stages of the process and conventional water treatment,the changes in organic pollutant concentration and CODCr were analyzed.