Abstract
Malolactic fermentation is carried out by lactic acid bacteria which convert L-malic acid, present in wine after the alcoholic fermentation, into L-lactic acid and CO2 in the presence of NAD and Mn++. Many researchers have tried to improve the control and yield of this conversion with different systems (i.e., selection of strains, stimulating bacteria, hyperproducing modified strains, bioreactors with free or gel-entrapped bacteria, bioreactors with immobilized enzyme). We propose in this paper a membrane reactor using free enzyme, extracted from lactic acid bacteria, and cofactor to carry out the malolactic fermentation. Experiments have been carried out, after the design of the reactor, to obtain a maximum yield as a function of the operating conditions. We can assert that a yield of 70% is possible in a period of about one week.
- Received December 1996.
- Copyright 1997 by the American Society for Enology and Viticulture
Sign in for ASEV members
ASEV Members, please sign in at ASEV to access the journal online.
Sign in for Institutional and Non-member Subscribers
Log in using your username and password
Pay Per Article - You may access this article (from the computer you are currently using) for 2 day for US$10.00
Regain Access - You can regain access to a recent Pay per Article purchase if your access period has not yet expired.