O_3/H_2O_2处理含油废水的研究

Study on Treatment of Oily Wastewater by O_3/H_2O_2

为控制石油炼化含油废水对环境的污染,采用O3/H2O2方法对石油炼化含油废水进行处理,主要考察了臭氧浓度、H2O2投加量、反应温度、反应时间、pH等因素对处理效果的影响。实验表明,废水中石油烃类物质的去除率随着臭氧浓度、反应时间的增加而升高;石油烃类物质在pH值2-10、温度15-45℃、10-60 mL的H2O2投加量范围内,去除率分别呈现先增后降的趋势。处理1 L油质量浓度为110 mg/L的含油废水,臭氧质量浓度为7.23 mg/L,投加40 mL H2O2,pH为9,在35℃的条件下反应8 min,油去除率可以达到84%。同样条件下处理30 min,废水COD下降了65%。这将为该工艺处理实际含油废水提供实验依据。

In order to control the pollution of oily wastewater, O3/H2O2 oxidation technology is applied to solve this problem. The factors affecting oil removal efficioney, such as ozone concentration, dosage of H2O2, tenrperature, treatment time and pH have been systematically examined in this paper. The research shows that with the increase of the ozone concentration and the treatment time, the removal rate of petrolenm hydrocarbons also increases; Within the range of temperature （15 - 45 ℃ ）, pH vsule （2 - 10） and dosage of H2O2（10 - 60 mL）, the removal rate has a trend of increase firstly and then decrease. The optimal conditions are found to be as follows： the concentration of the ozone gas load gets to 7.23 mg/L, pH 9, H202 dosage 40 mL, and temperature 35 ℃ with reaction period of 8 wins. Under these conditions, for an initial oil concentration in the water sample of 110 mg/L, the oil re, royal rates can reach to over 84% and COD declines 65% after 30 wins. The results may provide a basis for the practical application in the treatment of oil - containing wastewater.