Organic acid production process uses Donnan-dialysis anion exchanger-membrane

摘要

The invention proposes a process for the separation of organic acids (14) from a fermentation medium (12) contained in a fermentation device (11). The fermentation medium (12) is supplied onto a membrane device (13) in which the acid (14) contained in the fermentation medium (12) is separated. The membrane device (13) works according to the principle of Donnan dialysis through anion exchanger membranes. The fermentation medium (12) (supply) is circulated along the supply side (15) of the membrane device (13) while a dialysate (17) is circulated along the outlet side (16) of the membrane device (13), in which the acid (14) traversing the membrane (13) is enriched as salt.