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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 response surface analysis method based on Box-Behnken was used to optimize the Fenton process for the treatment of high phosphorus content cleaning wastewater in offshore oil and gas pipelines. H2O2 (mass fraction 30%) dosage, [H2O2] / [Fe2 +], pH three factors on phosphorus removal of wastewater COD removal rate. Design experiments were conducted by using Design-Expert 8.0.6 software, and the experimental results were analyzed. The second-order polynomial model with COD removal rate as the response value was established and the significance test was conducted. The results showed that there were significant correlations between COD removal rates and the three selected factors. The effects of individual factors and interaction on COD removal rate were analyzed. The optimal conditions for the reaction were determined, that is, the dosage of H2O2 (mass fraction 30%) was 2.76 mL in 100 mL waste water, and the ratio of [H2O2] / [Fe2 +] was 10.26 and the pH was 4.24. Was 90.2%. The COD removal rate was 86.1% and the deviation was only 4.1%. The actual values were in good agreement with the model predictions.