TiO_2光催化臭氧氧化-生物活性炭工艺处理城市污水  

Removal of organic matter in municipal wastewater by combined use of TiO_2 photocatalytic ozonation and biologically activated carbon

作　　者：李来胜[1] 祝万鹏[2] 张彭义[2] 张秋云[1] 

机构地区：[1]华南师范大学化学与环境学院,广东广州510006 [2]清华大学环境科学与工程系,北京100084

出　　处：《中国环境科学》2007年第5期627-632,共6页China Environmental Science

基　　金：国家"863"项目(2002AA601250);国家自然科学基金资助项(50238020)

摘　　要：将TiO2光催化臭氧氧化-生物活性炭(TiO2/UV/O3-BAC)新型组合工艺用于处理城市污水.在优化工艺参数下,该工艺对TOC和UV254平均去除率分别为47.4%和76.9%,比UV/O3-BAC和O3-BAC工艺对TOC平均去除率分别提高10.2和40.2%.3种组合工艺对有机物去除具有协同效应,其中TiO2/UV/O3-BAC工艺的协同效应最大,UV/O3-BAC工艺次之.TiO2/UV/O3过程将水中大分子有机物氧化成小分子,增加了出水的可生化性,从而有利于后续BAC对有机污染物的去除.二级出水中有机污染物主要是酚类和酞酸酯,经氧化处理后,芳香烃和含-C=C-有机物消失或浓度减少,同时也生成一些小分子氧化产物,但经BAC处理后,污染物种类与浓度均大为减少.Removal of organic matter in municipal wastewater by using photocatalytic ozonation-biologically activated carbon（TiO2/UV/Oa-BAC）was investigated. At the optimum conditions, 47.4% of TOC and 76.8% of UV254 was removed in TiO2/UV/O3-BAC process. TiO2/UV/O3-BAC process was most efficient in removing TOC, which was increased about 10.2% compared with UV/Oa-BAC process, and 40.2% compared with UV/O3-BAC process. TiO2/UV/O3 process decomposed macromolecules into low molecules and increased biodegradability. Some kinds of small molecules formed after TiO2/UV/O3, but kinds and concentration of organic matters were greatly reduced including phthalate esters by the sequent BAC process.

关 键 词：TIO2 光催化臭氧氧化 生物活性炭 可生化性 

分 类 号：X703.1[环境科学与工程—环境工程]