臭氧—活性炭技术处理石油微污染地下水*

在实验室及中试条件下研究了臭氧-活性炭技术对石油微污染地下水的处理效果。通过石油类和高锰酸盐指数两个指标,考察了臭氧投加量、pH值、过滤速率等操作参数对污染物的去除效果。结果表明:臭氧投加量和活性炭过滤速率是最主要的影响因素,pH值对处理效果影响不显著。中试条件下适宜的臭氧投加量应为8mg/L左右,最佳过滤速率在10m/h附近。采用臭氧氧化与活性炭过滤组合工艺,当进水石油类浓度在1.5mg/L以下时,出水石油类低于0.3mg/L,高锰酸盐指数低于3.0mg/L。

Study on Ozone Oxidation-activated Carbon Method for the Treatment of Petroleum Micro-polluted Groundwater

Ozone oxidation-activated carbon(O3-AC) method for the treatment of micro-polluted oily water was studied in lab-scale conditions initially and in pilot afterwards.The effects of running parameters on removal rates of oil and CODMn,such as ozone dosage,pH,and filtration velocity were studied.The experiment results showed that ozone dosage and filtration velocity in carbon bed were the most important factors,and the parameters of pH had little effect on the treatment.The reasonable ozone dosage was about 8 mg/L in pilot experiment,and the best value of filtration velocity was around 10 m/h.Besides,Ozone oxidation and activated carbon combined technology can ensure effluent concentrations of oil and CODMn less than 0.3 mg/L and 3.0 mg/L respectively when corresponding influent concentrations below 1.5 mg/L and 3.5 mg/L.