摘要
论述了臭氧生物活性炭工艺中的臭氧发生系统、臭氧尾气处理系统、臭氧预氧化及后氧化、生物活性炭滤池各阶段的应用现状及特点。指出:臭氧发生系统采用氧气为原料来提高臭氧浓度,臭氧质量分数可达6%左右;由于电加热分解臭氧尾气反应速度快,可在1.5～2s内完全分解,应是今后自来水厂臭氧尾气处理技术应用的重点;臭氧预氧化一般采用静态混合器或水射器单点投加,投加量为1～2mg/L,接触时间为1～4min;臭氧后氧化一般采用微孔曝气盘以微气泡的形式多点投加,水中臭氧余量控制在0.2～0.4mg/L,接触时间大于10min;生物活性炭滤池对苯类化合物和相对分子质量在500～1000范围内的腐殖质去除率达70%～86.7%。
Application status and characteristics of phases in ozonation-biological activated carbon process include： ozone generation system, ozone tail gas decomposing system, preozonation and post-ozonation, and biological activated carbon filter were elaborated. It is indicated that： oxygen was used as feedstock to increase the concentration of ozone in ozone generation system, the mass fraction of ozone reached about 6%; for the reaction speed of ozone tail gas decomposing by electrical heating technology was fast, ozone tail gas can be totally decomposed in 1.5 - 2 seconds, it should be the future emphase of the application of ozone tail gas treatment technology in water plant; in preozonation phase, ozone usually be added at a single point by static mixture or portacel, the dosage was 1 - 2 mg/L, the contact time was 1 - 4 min ; While, in post-ozonation phase, ozone usually be added with a form of micro bubble at several points by micropore aeration plate. The surplus of ozone in water was controlled in the range： 0.2 - 0.4 mg/L, contact time was longer than 10 min; Using biological activated carbon filter to treat benzene compound and humus which relative molecular mass was in the range： 500 - 1 000, the removal rate reached 70% - 86.7%.
出处
《工业用水与废水》
CAS
2005年第4期7-9,共3页
Industrial Water & Wastewater
关键词
饮用水
深度处理
臭氧氧化
生物活性炭
drinking water
advanced treatment
ozone oxidation
biological activated carbon
