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Charging and separation behavior of gluten-starch mixtures assessed with a custom-built electrostatic separator

机译：用定制的静电分离器评估面筋-淀粉混合物的充电和分离行为

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Electrostatic separation is a novel and sustainable process for dry separation of food ingredients. To establish guidelines for electrostatic separation, well-defined charging and separation experiments of model mixtures prepared from wheat gluten and starch were carried out. For this a custom-built bench-scale electrostatic separator was developed. Charging behavior of mixtures improved with decreasing particle concentration and increasing gas flow rate, which was similar compared to charging behavior of single materials. However, the charge of mixtures was not simply the sum of the charge of single materials because particle-particle interactions also largely influence the charging. Separation efficiencies for mixtures were found lower than could be expected on the basis of behavior of single materials in the equipment. This was attributed to formation of agglomerates by particles having opposite charge, which was further confirmed by the observation that dispersibility of the mixtures was poorer than for the single materials. Agglomeration of particles during electrostatic separation can be minimized by using high gas flow velocity, low feed dosing and higher field strength. (C) 2015 Elsevier B.V. All rights reserved.
机译：静电分离是食品成分干分离的一种新颖且可持续的方法。为了建立静电分离的指导原则，对由小麦面筋和淀粉制备的模型混合物进行了明确定义的充电和分离实验。为此，开发了定制的台式静电分离器。混合物的充电行为随着颗粒浓度的降低和气体流速的增加而改善，这与单一材料的充电行为相似。但是，混合物的电荷不仅是单一材料的电荷之和，因为颗粒间的相互作用也极大地影响了电荷。发现混合物的分离效率低于设备中单一材料的性能所预期的效率。这归因于带相反电荷的颗粒形成的附聚物，这通过观察到混合物的分散性比单一材料差的观察进一步证实。通过使用高气体流速，低进料剂量和较高的场强，可以使静电分离过程中的颗粒团聚最小化。 （C）2015 Elsevier B.V.保留所有权利。

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