纳米TiO_2光催化-超滤法处理模拟二级出水  

Treatment of simulated secondary effluent with a method of nano-TiO_2 photocatalysis and ultrafiltration membrane

作　　者：王旭东[1] 唐婧[1] 王磊[1] 黄丹曦[1] 夏四清[1,2] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,西安710055 [2]同济大学环境科学与工程学院,上海200092

出　　处：《环境工程学报》2016年第4期1615-1620,共6页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(51278408);陕西省科技统筹创新工程计划项目(2013KTCL03-16);陕西省科技新星项目(2014KJXX-65)

摘　　要：采用纳米TiO_2光催化-超滤对模拟二级出水进行处理。分别考察了纳米TiO_2光催化剂的投加量、光催化反应时间、光催化过程曝气量、膜出水通量以及回流比对废水中污染物去除率的影响。结果表明:光催化反应最优处理工况,纳米TiO_2投加量250 mg/L、反应时间150 min、曝气量为1.0 L/min、膜出水通量为115 L/(m^2·h)、错流过滤的回流比200%;在此工况条件下,出水的UV254和TOC的去除率分别为96%和84%。The technology of nano titanium dioxide（ TiO_2） photocatalysis and ultrafiltration membranes are used in advanced wastewater treatment. In order to understand the effects of this treatment,the dosage of nanoTiO_2,photocatalytic reaction time,aeration rate,water flux,and reflux ratio were investigated. The results showed that the best treatment performance could be achieved when the dosage of nano-TiO_2 was 250 mg / L,reaction time was 150 min,aeration rate was 1. 0 L / min,membrane water flux was 115 L /（ m^2·h）,and reflux ratio was200%. In addition,the removal rates of UV254 and TOC in the final effluent were 96% and 84%,respectively.

关 键 词：超滤 光催化 纳米二氧化钛 二级出水 

分 类 号：X703[环境科学与工程—环境工程]