Abstract

Electrodialysis is an electrochemical process mainly used in industry for solution demineralization. A new type of membrane, the bipolar membrane, allows the electro-dissociation of water. The first industrial application of bipolar-membrane electrodialysis was oriented toward the recovery of acids and bases from salt streams. Recently, bipolar-membrane electrodialysis has been used to inhibit polyphenol oxidase in apple juice, the enzyme responsible for the enzymatic browning of cloudy juice, and to separate soybean proteins from other components without denaturing them, in order to produce protein isolates. Bipolar-membrane electrodialysis technology is an environmentally friendly technology with a wide-ranging application potential.

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