臭氧强化BAF工艺处理微污染窖水  

O_3-enhanced BAF treatment of slightly polluted cellar rainwater

作　　者：张国珍[1] 尹振珑 武福平[1] 

机构地区：[1]兰州交通大学环境与市政工程学院,兰州730070

出　　处：《环境工程学报》2017年第6期3405-3411,共7页Chinese Journal of Environmental Engineering

基　　金：甘肃省建设厅科技攻关项目(JK2010-26);国家自然科学基金资助项目(51468033)

摘　　要：采用臭氧-BAF组合工艺处理西北地区微污染窖水,使用比紫外吸收值(SUVA)、有机物分子量分布和三维荧光光谱等指标分析了臭氧预氧化对微污染窖水有机物特性的影响,研究了组合工艺对不同污染物的去除效果。结果表明:原水经臭氧预氧化后类腐殖质、类色氨酸物质含量分别下降65%、18%;水中小分子有机物含量增加,进水可生化性提高;经臭氧预氧化后BAF反应器出水类色氨酸物质含量低于未经臭氧预氧化的BAF反应器出水,臭氧预氧化起到了强化后续生物处理的作用。反应器出水CODMn、NH_3-N浓度分别为2.97 mg·L^(-1)、0.12 mg·L^(-1),满足生活饮用水卫生标准的要求;TOC、UV254和TN去除率分别为55%、53%和45%,水中污染物质得到有效去除。The combined O3-BAF technique was used to treat slightly polluted cellar rainwater in northwest Chi- na. The effects of pre-ozonation on the characteristics of organic compounds and the removal performance of dif- ferent pollutants were evaluated using specific ultraviolet absorption, molecular-weight distribution, and three-di- mensional fluorescence spectra as indicators. The results showed that the content of humic-like and tryptophan- like chemicals decreased by 65% and 18% , respectively, after pre-ozonation. The biodegradability of the influ- ent improved due to the higher amount of small molecular weight organic compounds. A lower content of trypto- phan-like chemicals was observed in the BAF effluents that underwent pre-ozonation than in the effluents that did not, which indicates that enhanced biological treatment efficiency can be achieved by the pre-ozonation process. The effluent CODMn and NH3-N were 2.97 mg · L-1 and 0. 12 mg· L-1 , respectively, which satisfy the Drink- ing Water Quality Standard. Pollutants can be removed effectively using this combined technique, with TOC, UV254 , and TN removal rates of 55% , 53% , and 45% , respectively.

关 键 词：微污染窖水 臭氧预氧化 曝气生物滤池 比紫外吸收值 三维荧光光谱 分子量分布 

分 类 号：X703[环境科学与工程—环境工程]