金门水厂原水中臭味物质去除的中试研究

金门地区水库富营养化严重影响饮用水水质。夏天藻类所产生的臭味以土霉味为主。土霉味主要来自于藻类代谢物二甲基异冰片和土臭素。利用活性炭处理工艺分别使二甲基异冰片、土臭素及嗅值的去除率达92%、83%及72%;而利用臭氧一生物活性炭工艺则可使二甲基异冰片、土臭素及嗅值的去除率分别达96.3%、100%及96.7%。组合工艺可有效去除臭味物质,但清水池加氯消毒所产生的氯臭味,使嗅值无法达到台湾地区的饮用水水质标准,因此要特别注意控制加氯量。

Pilot study on odor removal in Kinmen Waterworks

The eutrophication in reservoir in Kinmen County brought odor troubles,which seriously threatened the drinking water quality.In summer there was mainly musty odor caused by the primary metabolites of 2-methyl-isoborneol and geosmin.Activated carbon treatment process had been applied to deal with this odor problem,and removal efficiencies of 92%,83% and 72% had been achieved for 2-methyl-isoborneol,geosmin and odor respectively.Comparatively,removal efficiencies of 96.3%,100% and 96.7% for 2-methyl-isoborneol,geosmin and odor respectively were obtained after the combination treatment of ozone and biological activated carbon processes. Combination processes could remove odor effectively.However,odor aroused from chlorine disinfection in clean water tank,which could not be efficiently eliminate and it was higher than the allowable limitation of water quality standard in Taiwan.Future progress will focus on the control of dosing quantity of chorine.