某水厂深度处理工艺对鱼腥味及醛类物质的控制效果研究

Study on Removal of Fishy Odor and Aldehydes in a Full-scale Water Treatment Plant with Ozonation and Niological Activated Carbon

针对江苏里下河地区某嗅味水源的鱼腥味问题及深度处理控制效果进行了探讨。结果表明,12个监测月份中醛类物质浓度与鱼腥味强度相关性系数可以达到0.639,原水鱼腥味主要与庚醛、2-辛烯醛、2,4-癸二烯醛、2,6-壬二烯醛、2,4-庚二烯醛、苯甲醛、beta-环柠檬醛有关。经过沉淀工艺段、臭氧工艺段后,鱼腥味强度及醛类物质的含量都有稍微的升高,生物活性炭技术可以有效控制鱼腥味及醛类物质,出水中鱼腥味未检出。实际生产水厂需要加强对沉淀、臭氧工艺段的水质管理。

In this study, fishy odor problem and removal effect of advanced treatment in odorous source water of Lixiahe region in Jiangsu Province were discussed. The results indicated that con＇elation coefficient between aldehyedes contents and fishy odor intensities could be reached to 0.639 in twelve months. The fishy odor of source water was caused by heptanal, 2-oetenal, 2,4- deeadienal, 2,6-nonadienal, 2,4-heptadienal, benzaldehyede and beta-eyeloeitral. Fishy odor and aldehydes were removed effectively by biological activated carbon, while no odor was detected in effluent. However, Fishy odor intensities and aldehydes contents enhance a littile after sediment and ozonation processes. The water quality management of sediment and ozonation processes shoule be noted in water treatment plant.