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首页> 美国卫生研究院文献>Membranes >Preliminary Study on Enzymatic-Based Cleaning of Cation-Exchange Membranes Used in Electrodialysis System in Red Wine Production
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Preliminary Study on Enzymatic-Based Cleaning of Cation-Exchange Membranes Used in Electrodialysis System in Red Wine Production

机译：基于酶的红酒生产电渗析系统阳离子交换膜清洗的初步研究

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The use of enzymatic agents as biological solutions for cleaning ion-exchange membranes fouled by organic compounds during electrodialysis (ED) treatments in the food industry could be an interesting alternative to chemical cleanings implemented at an industrial scale. This paper is focused on testing the cleaning efficiency of three enzyme classes (β-glucanase, protease, and polyphenol oxidase) chosen for their specific actions on polysaccharides, proteins, and phenolic compounds, respectively, fouled on a homogeneous cation-exchange membrane (referred CMX-Sb) used for tartaric stabilization of red wine by ED in industry. First, enzymatic cleaning tests were performed using each enzyme solution separately with two different concentrations (0.1 and 1.0 g/L) at different incubation temperatures (30, 35, 40, 45, and 50 °C). The evolution of membrane parameters (electrical conductivity, ion-exchange capacity, and contact angle) was determined to estimate the efficiency of the membrane′s principal action as well as its side activities. Based on these tests, we determined the optimal operating conditions for optimal recovery of the studied characteristics. Then, cleaning with three successive enzyme solutions or the use of two enzymes simultaneously in an enzyme mixture were tested taking into account the optimal conditions of their enzymatic activity (concentration, temperatures, and pH). This study led to significant results, indicating effective external and internal cleaning by the studied enzymes (a recovery of at least 25% of the electrical conductivity, 14% of the ion-exchange capacity, and 12% of the contact angle), and demonstrated the presence of possible enzyme combinations for the enhancement of the global cleaning efficiency or reducing cleaning durations. These results prove, for the first time, the applicability of enzymatic cleanings to membranes, the inertia of their action towards polymer matrix to the extent that the choice of enzymes is specific to the fouling substrates.
机译：在食品工业中，在电渗析（ED）处理过程中使用酶试剂作为生物溶液来清洁有机化合物结垢的离子交换膜可能是工业规模化学清洗的有趣替代方法。本文的重点是测试分别针对均质阳离子交换膜上污损的多糖，蛋白质和酚类化合物的三种特定作用选择的三种酶（β-葡聚糖酶，蛋白酶和多酚氧化酶）的清洁效率。 CMX-Sb）用于工业上ED的酒石稳定化。首先，使用每种酶溶液分别在不同的孵育温度（30、35、40、45和50°C）下以两种不同的浓度（0.1和1.0 g / L）进行酶促清洁测试。确定了膜参数（电导率，离子交换容量和接触角）的演变，以估计膜的主作用及其副活性的效率。基于这些测试，我们确定了用于最佳恢复研究特性的最佳操作条件。然后，考虑到其酶促活性的最佳条件（浓度，温度和pH值），测试了用三种连续的酶溶液清洗或同时在酶混合物中使用两种酶的情况。这项研究得出了重要的结果，表明所研究的酶可以有效地进行内部和外部清洁（至少恢复25％的电导率，14％的离子交换容量和12％的接触角），并证明可能存在的酶组合的存在，以提高整体清洁效率或减少清洁时间。这些结果首次证明了酶促清洁剂对膜的适用性，其对聚合物基质的作用的惯性，以至于酶的选择对结垢底物而言是特定的。

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