Title: Process for fermentation of media containing carbohydrates with help of bacteria
Application Number: 88101266 Application Date: 1988.03.10
Publication Number: 1021090 Publication Date: 1988.09.28
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C12M1/00;C12N1/00;C12P7/02;C12P7/26
Applicant(s) Name: Effenberger Helmut (AT) Florianigasse 38/13, 1080 Address:
Inventor(s) Name: Effenberger Helmut;Salzbrunn Wolfgang;Schmidt Alfr
Attorney & Agent: CAO HENGXING YANG JIANXIA
Abstract:
    Process for the fermentation of media containing carbohydrate, aided by bacteria forming butanol, acetone, ethanol and/or isopropanol, carried out in at least two stages, the first consisting essentially of continuous cultivation of the bacteria, the second, carried out continuously or in batches, consisting essentially of product formation. In order to achieve long-duration stability of the process, as well as an increase in productivity and in sugar break-down, the bacteria are immobilized during the second stage on a carrier material. Medium can therefore be drawn off at the product formation stage and the formed product can be isolated, thus avoiding inhibition caused by too high a concentration of the product. The device for implementing said process consists of a bioreactor, preferably an agitation pan bioreactor 4, and a reactor provided with a bacteria-retentive material, preferably a fixed-bed reactor, disposed successively. An external loop may be attached to the fixed-bed reactor for product isolation, preferably continuous.
Time: 8