臭氧氧化技术对饮用水中消毒副产物生成的影响研究

发布时间：2018-01-19 07:24

本文关键词： 三卤甲烷卤乙酸 O_3/H_2O_2 溴代消毒副产物　出处：《华北电力大学》2013年硕士论文　论文类型：学位论文

【摘要】：随着我国水源水水质不断恶化,供水厂传统水处理工艺已经不能满足当前生活饮用水卫生水质指标要求。臭氧-生物活性炭工艺作为目前应用广泛的深度处理工艺,特别是当水源水为地表水时,该工艺的实用价值更为突出。当水源水中含有溴离子时,投加臭氧不仅会产生致癌物溴酸盐,而且也会产生大量的溴代消毒副产物,且其毒性高于氯代消毒副产物,因此研究臭氧氧化含溴水源水中消毒副产物生成的影响对于保障饮用水安全具有重要意义。本课题分两个阶段进行。第一阶段是在静态试验中,研究了不同臭氧投加量和溴离子浓度配水中,三卤甲烷和卤乙酸生成量及生成种类变化规律。第二阶段是在某水厂示范工程的臭氧-生物活性炭动态工艺中,研究了不同运行工况下工艺段出水常规水质指标和消毒副产物的生成情况。并与水厂传统处理工艺进行比较,示范工程评估阶段设计六个运行工况,优化工艺运行参数。研究表明：(1)静态试验中,臭氧化处理不同溴离子浓度配水时,水中三卤甲烷和卤乙酸的生成量随着臭氧投加量的增加呈现先增加后减少的趋势；当臭氧投加量为2.0mg/L,三卤甲烷和卤乙酸生成量均达到最大；(2)配水中溴离子浓度越高,生成的溴代消毒副产物比例越大；(3)实际水厂示范工程中,臭氧投加量低于2.0mg/L,溴酸盐产量未超标(低于l0μg/L),臭氧化处理工艺对水的浊度及有机物去除效果良好；(4)示范工程单独臭氧工艺对三卤甲烷和卤乙酸的生成总量有较好的抑制效果,但对溴代消毒副产物抑制效果不佳；采用O3/H2O2高级氧化技术对卤乙酸的控制效果优于三卤甲烷；(5)对比O3-BAC和水厂传统水处理工艺出水水质,臭氧化工艺对有机物去除效果良好,且O3-BAC消毒时需氯量较低,出水中的三卤甲烷(THMs)和卤乙酸(HAAs)生成量均低于传统工艺出水。
[Abstract]:With the deterioration of source water quality in China. The traditional water treatment process in water supply plant can not meet the requirement of drinking water quality. Ozone biological activated carbon process is widely used in advanced treatment process. Especially when the source water is the surface water, the practical value of the process is more prominent. When the source water contains bromine ions, the addition of ozone will not only produce the carcinogen bromate. It also produces a large number of brominated disinfection by-products, and its toxicity is higher than that of chlorinated disinfection by-products. Therefore, it is of great significance to study the effects of ozone oxidation on the formation of disinfection by-products in brominated source water. This subject is divided into two stages. The first stage is to study the different ozone dosage and bromine ion concentration in the static experiment. The formation amount of trihalomethane and haloacetic acid and the variation rule of formation species. The second stage is in the ozonic-biological activated carbon dynamic process of a water plant demonstration project. The conventional water quality index of effluent and the generation of disinfection by-products were studied under different operating conditions. Compared with the traditional treatment process of water plant, six operating conditions were designed in the stage of demonstration project evaluation. Optimize process operation parameters. The results showed that in the static test, the amount of trihalomethane and haloacetic acid in water increased first and then decreased with the increase of ozone dosage. When the ozone dosage is 2.0 mg / L, the production of trihalomethane and haloacetic acid reaches the maximum. (2) the higher the concentration of bromine ions in the mixed water, the larger the proportion of brominated disinfection by-products; (3) in the actual water plant demonstration project, the ozone dosage is less than 2.0 mg / L, the bromate output is less than the standard (less than 10 渭 g / L ~ (-1)), the ozonation treatment process has a good effect on the turbidity and organic matter removal of the water. 4) the ozone process alone in the demonstration project has a good inhibitory effect on the total production of trihalomethane and haloacetic acid, but not on brominated disinfection by-products. The control effect of O _ 3 / H _ 2O _ 2 advanced oxidation technology on halogenated acetic acid is better than that of trihalomethane. Compared with the effluent quality of O3-BAC and traditional water treatment process, the ozonation process has a good removal effect on organic matter, and the chlorine requirement of O3-BAC disinfection is lower. The production of trihalomethane (THMs) and haloacetate (Has) in the effluent were lower than that in the traditional process.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU991.2

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