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首页> 外文期刊>Advances in Environmental Technology >Modeling and optimization of oil refinery wastewater chemical oxygen demand removal in dissolved air flotation system by response surface methodology
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Modeling and optimization of oil refinery wastewater chemical oxygen demand removal in dissolved air flotation system by response surface methodology

机译：响应面法在溶解气浮系统中炼油废水化学需氧量的建模与优化。

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In this present study the dissolved air flotation (DAF) system was investigated for the treatment of Kermanshah Oil Refinery wastewater. The effect of three parameters on flotation efficiency including of flow rate (outflow from the flotation tank), saturation pressure and coagulant dosage on chemical oxygen demand (COD) removal was examined experimentally. All the experiments were done under a certain time (in this case 3 min). After final testing maximum COD removal efficiency was obtained 67.86%. In the next step of study, response surface method (RSM) was applied to model oil refinery wastewater COD removal as a function of flow rate, saturation pressure and coagulant dosage. Coefficient of determination, R2, showed that the RSM model can explain the variation with the accuracy of 0.996, indicating there was strong correlation. Moreover, process optimization were performed to predict the best operating conditions using RSM method, which resulted in the maximum COD removal of the oil refinery wastewater. The maximum COD removal of oil refinery wastewater was estimated by RSM to be 67.87% under the operational conditions of flow rate (3.76 – 3.86 L/min), saturation pressure (4.99 - 5bar) and coagulant dosage (24.16 – 24.79 mg/L).
机译：在本研究中，对溶解空气浮选（DAF）系统进行了研究，以处理Kermanshah炼油厂废水。实验考察了三个参数对浮选效率的影响，包括流速（从浮选槽流出），饱和压力和凝结剂用量对去除化学需氧量（COD）的影响。所有实验均在一定时间（本例中为3分钟）内完成。最终测试后，获得最大的COD去除效率为67.86％。在下一步研究中，将响应面方法（RSM）用于模拟炼油厂废水中COD的去除，该去除率是流速，饱和压力和凝结剂用量的函数。测定系数R2表明，RSM模型可以以0.996的精度解释该变化，表明存在很强的相关性。此外，使用RSM方法进行了工艺优化以预测最佳运行条件，从而使炼油厂废水的COD去除量达到最大。在流量（3.76 – 3.86 L / min），饱和压力（4.99 – 5bar）和凝结剂用量（24.16 – 24.79 mg / L）的操作条件下，RSM估计炼油厂废水的最大COD去除率为67.87％。 。

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