Fenton方法处理海洋油气管道高含磷清洗废水工艺优化研究

PROCESS OPTIMIZATION OF FENTON'S TREATMENT OF MARINE OIL AND GAS PIPELINES CONTAINING HIGH PHOSPHORUS WASHING WASTEWATER

采用基于Box-Behnken的响应面分析方法,优化研究了Fenton方法处理海洋油气管道高含磷清洗废水工艺。H2O2(质量分数30%)投加量、[H2O2]/[Fe2+]、pH 3个因素对含磷清洗废水中COD去除率的影响。利用Design-Expert8.0.6软件设计实验,并对实验结果进行了分析,建立了以COD去除率为响应值的2次多项式模型,并对其进行了显著性检验。结果表明,选取的3个因素对COD去除率存在显著的相关性。分析了各个因素单独及交互作用对COD去除率的影响。确定了反应的优化条件,即在100 mL废水中H2O2(质量分数30%)投加量为2.76 mL,[H2O2]/[Fe2+]为10.26,pH为4.24,在此条件下,预测COD去除率为90.2%,实验验证COD去除率为86.1%,偏差仅为4.1%,实际值与模型预测值拟合性良好。

The objective of this study was to optimize the process which Fenton reagent dealt with the high phosphorus wastewater washing marine oil and gas pipelines by response surface methodology based on Box-Behnken design. The three factors were H2O2（mass fraction 30%） dosage, the mole ratio of [H2O2]/[Fe^2＋] and pH. The study designed experiment by Design-Expert 8.0.6 and analyzed the results, built a quadratic polynomial model with COD removal rate as the response value and was validated by significance test. The results show that three factors have a significant correlation on the COD removal rate. Various factors and interaction effects on COD removal rate were analyzed separately. The best conditions are： in 100 mL wastewater, H2O2（mass fraction 30%） dosage is 2.76 mL, [H2O2]/[Fe^2＋] is 10.26, pH is 4.24. On this condition, Predicted value of COD removal rate is 90.2%, experimental validation COD removal rate is 86.1%, the deviation is only 4.1%, the experiment value is suitable for the predicted value.