METHOD FOR SEPARATION OF POTATO PROTEINS AND INSOLUBLE FIBERS FROM PHENOLIC AND/OR GLYCOALKALOID COMPOUNDS

摘要

The present invention concerns a method for separation of (a) potato proteins and insoluble fibers from (b) first salts and phenolic and/or glycoalkaloid compounds in potato fruit juice or a derivative thereof, said method comprising the steps of: (i) providing a potato fruit juice or a derivative thereof, comprising potato proteins; and insoluble fibers; and one or more first salts; and phenolic and/or glycoalkaloid compounds; (ii) subjecting the potato fruit juice or the derivative thereof to a first cross-flow membrane filtration process resulting in a first retentate and a first permeate; and (iii) adding aqueous diafiltration liquid containing one or more salts to the first retentate and performing a second cross-flow membrane filtration as diafiltration, to create a second permeate containing at least a portion of said phenolic and/or glycoalkaloid compounds and salts and a second retentate comprising potato proteins, salts and insoluble fibers. The present invention further concerns a potato fruit juice product comprising potato protein and insoluble fibers, such as a potato fruit juice product obtainable by the method according to the invention.