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首页> 外文期刊>Separation and Purification Technology >Ultrafiltration of orange press liquor: Optimization for permeate flux and fouling index by response surface methodology
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Ultrafiltration of orange press liquor: Optimization for permeate flux and fouling index by response surface methodology

机译：橙压榨液的超滤：通过响应面法优化渗透通量和结垢指数

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A Box-Behnken design of response surface methodology (RSM) was used to analyze the performance of polysulphone ultrafiltration (UF) hollow fiber membranes in the clarification of orange press liquors. A regression model was developed for permeate flux, fouling index and blocking index as a function of transmembrane pressure (TMP), temperature and feed flow-rate. The experimental operating conditions were selected within the following ranges: TMP 0.2-1.4 bar, temperature 15-35 ℃, and feed flow-rate 85-245 L/h. A total of 30 experiments was performed according to the total recycle configuration. Based on the lack-of-fit test, the analysis of variance (ANOVA) showed the regression model to be adequate. From the regression analysis, the permeate flux, fouling index and blocking index were expressed with quadratic equations of TMP, temperature and feed flow-rate. Quadratic terms of TMP, temperature and feed flow-rate showed a significant influence on the performance of the UF membrane. A strong interaction effect of temperature and feed flow-rate was observed on the permeate flux while interactions TMP-temperature and TMP-feed flow-rate were found to be less significant. In the case of fouling index, interactions TMP-temperature and TMP-feed flow-rate produced a significant effect. In order to maximize the permeate flux and minimize the fouling index, the desirability function approach was applied to analyze the regression model equations. The optimized operating variables were found to be 1.4 bar, 15 ℃ and 167.7 L/h for a maximum desirability of 0.76. Experimental data of permeate flux and fouling index, obtained in optimized operating conditions, resulted in a good agreement with the predicted values of the regression model.
机译：使用Box-Behnken设计的响应面方法（RSM）来分析聚砜超滤（UF）中空纤维膜在澄清橙榨酒中的性能。建立了渗透通量，结垢指数和阻塞指数与跨膜压力（TMP），温度和进料流速之间函数的回归模型。实验操作条件在以下范围内选择：TMP 0.2-1.4 bar，温度15-35℃，进料流速85-245 L / h。根据总循环配置进行了总共30个实验。基于缺乏拟合检验，方差分析（ANOVA）表明回归模型是适当的。通过回归分析，用TMP，温度和进料流量的二次方程表示渗透通量，结垢指数和阻塞指数。 TMP，温度和进料流速的二次项显示出对超滤膜性能的重大影响。观察到温度和进料流速对渗透通量的强烈相互作用，而TMP-温度和TMP-进料流速之间的相互作用不那么显着。在结垢指数的情况下，TMP温度和TMP进料流速之间的相互作用产生了显着影响。为了最大化渗透通量并最小化结垢指数，使用期望函数方法来分析回归模型方程。发现最佳操作变量为1.4 bar，15℃和167.7 L / h，最大期望值为0.76。在最佳运行条件下获得的渗透通量和结垢指数的实验数据与回归模型的预测值具有很好的一致性。

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