| 摘要 |
The invention relates to a method for obtaining a protein isolate and a fibre fraction from a parent substance containing fibres and protein. Said method comprises the following steps: conversion of the particles of the parent substance into an aqueous suspension; exertion of shear forces, which mechanically mill the particles in the suspension, whilst the fibres in the particles swell as a result of water absorption; monitoring of the pH value of the suspension during the swelling process of the fibres and maintenance of the pH value within a pH range that does not deviate from the natural pH value of the untreated parent substance by more than 2, optionally by the addition of acids and/or lyes; subsequent increase of the pH value of the suspension containing the swollen fibres to the alkaline range in order to release proteins that adhere to the fibres into an alkaline solution, whereby the particles containing the swollen fibres are finely distributed with an average particle size of between 10 and 150 ñm in a mass-weighted average; and isolation of one of the liquid phases containing the extracted proteins from the solids that are suspended in said phase and comprise the fibre fraction. |
