基于异嗅味特征分析的地下水处理技术试验

Experiment of Groundwater Treatment Technology Based on Analysis of Odor Characteristics

对地下水所存在的异嗅味问题进行异嗅味感官特征评估和异嗅味物质识别分析,在此基础上以铁、锰、异嗅味物质为特征水质指标,试验研究单独低温等离子体放电处理、单独锰砂过滤处理及锰砂-低温等离子体复合处理技术的处理效果。结果表明,该地下水主要嗅味类型为化学味、腐臭味和霉味,且嗅味强度达中等,异嗅味物质则主要来源于水体中苯类、吡嗪类和硫醚类等有机物,呈现多种有机物复合型嗅味特征,硫还原菌属和硫氧化菌属的检出也进一步佐证了硫醚类化合物的形成。此外,锰砂-低温等离子体复合处理技术对铁、锰和异嗅物质的整体去除率最高,其总量去除率分别可达95%、50%和77%,单独锰砂过滤处理技术去除效果也较佳,在实际应用中可综合考虑灵活选择。

In view of the odor problems existing in a groundwater,the evaluation of odor sensory characteristics and the identification analysis of odor substances were carried out.On this basis,with iron,manganese and odor substances as characteristic water quality indices,the treatment effects of single low temperature plasma discharge treatment,single manganese sand filtration treatment and manganese sand-low temperature plasma composite treatment were experimentally studied.The results showed that the main odor types of the groundwater were chemical odor,putrid odor and musty odor,and the odor intensity reached medium.The odor substances were mainly derived from benzene,pyrazines and thioethers in the water,showing complex odor characteristics of a variety of organic compounds.The detection of sulfur-reducing bacteria and sulfur-oxidizing bacteria also further confirmed the formation of thioethers.In addition,the manganese sand-low temperature plasma composite treatment technology had the highest removal rate of iron,manganese and odor substances,and the removal rate could reach 95%,50%and 77%,respectively.The removal effect of single manganese sand filtration treatment is also better,which can be flexibly selected in practical application.