FREMGANGSMAADE TIL UDSKILLELSE AF BIOTEKNOLOGISK FREMSTILLEDE VAERDIFULDE STOFFER FRA EN FERMENTERINGSSUPPE VED TVAERSTROEMS, -MIKRO- OG/ELLER ULTRAFILTRERING

摘要

The invention is a process for the separation of biotechnologically produced valuable materials from a fermenter broth by crossflow microfiltration and/or ultrafiltration, in which at least two modules arranged in series and fitted with porous membranes are used per stage, to produce concentrate and a permeate which contains the valuable material. The pressure of the permeate is controlled so that the absolute pressure on the permeate side is at different absolute pressure in each module.