TiO 2光催化处理炼化污水回用反渗透浓水的研究

摘要

Using suspended TiO 2 , photo-catalysis of concentrated water from wastewater recycling reverse osmosis units was studied under ultraviolet.The different variables affecting the removal efficiency such as reaction time , TiO2 quantity, pH value, UV irradiation intensity, H2O2 quantity and aeration quantity were investigated.The result showed that the removal rates of COD and chromaticity were 93.63% and 98.15%, respectively , under the following optimum conditions of reaction time of 2 h, TiO2 quantity of 0.6 g/L, pH value of 4, irradiation of high-pressure mercury-lamp of 500 W, H2 O2 quantity of 0.8 ml/L and aeration quantity of 0.75 L/min.%以悬浮态TiO2为催化剂，在紫外光下对炼化污水回用装置反渗透浓水进行光催化处理，采用单因素实验，考察了反应时间、 pH值、光照强度、 TiO2投加量、 H2 O2投加量、曝气量对处理效果的影响。结果表明：在反应时间为2 h， pH为4，500 W高压汞灯， TiO2投加量为0.6 g/L， H2 O2投加量为0.8 ml/L，曝气量为0.75 L/min的条件下，反渗透浓水COD的去除率可达93.63％，脱色率可达98.15％。