不同氧化法对模拟聚合物驱废水降黏效果的影响

分别采用UV-Fenton试剂氧化法、次氯酸钙氧化法和二氧化氯氧化法处理模拟聚合物驱废水,考察了各工艺条件对废水降黏效果的影响。实验结果表明:在初始废水pH为7、反应温度为50℃、反应时间为20 min的条件下,UV-Fenton试剂氧化法适宜的H2O2加入量为1 mmol/L,n(H2O2)∶n(Fe2+)=10,处理后废水降黏率达65.7%;次氯酸钙氧化法适宜的次氯酸钙加入量为500 mg/L,处理后废水降黏率达81.7%;二氧化氯氧化法适宜的二氧化氯加入量为100 mg/L,处理后废水降黏率为40.9%。3种氧化法对模拟聚合物驱废水的降黏率大小顺序为:次氯酸钙氧化法>UV-Fenton试剂氧化法>二氧化氯氧化法。

Effects of Different Oxidation Methods on Visbreaking of Simulated Polymer Flooding Wastewater

The simulated polymer flooding wastewater was treated by UV-Fenton reagent oxidation process,calcium hypochlorite oxidation process and chlorine dioxide oxidation process,respectively.The effects of process conditions on the visbreaking of the wastewater were studied.The experimental results show that:Under the conditions of initial wastewater pH 7,reaction temperature 50 ℃,reaction time 20 min,the suitable H2O2 dosage is 1 mmol/L,n(H2O2)∶n(Fe2+) = 10,the visbreaking rate of the wastewater is 65.7%;The suitable calcium hypochlorite dosage is 500 mg/L,the visbreaking rate of the wastewater is 81.7%;The suitable chlorine dioxide dosage is 100 mg/L,the visbreaking rate of the wastewater is 40.9%.The order of the visbreaking efficiencies of the processes is:calcium hypochlorite oxidation process>UV-Fenton reagent oxidation process>chlorine dioxide oxidation process.