A NEW YEAST STRAIN OF THE GENUS ISSATCHENKIA, AND A PROCESS FOR PRODUCING XYLITOL, ETHANOL AND BIOMASS BY IMPLEMENTING THIS STRAIN

摘要

A yeast stock of Issatchenkia occidentalis (I) deposited under national collection of cultures of micro-organisms (CNCM) (N0 CNCM I-3402), is new. An independent claim is also included for use of (I) for producing xylitol, ethanol, and biomass, comprising multiplying (I) on a rich culture medium to prepare an inoculum and cultivating the inoculum containing 5000-5000000 cells/ml in a fermenter containing a medium, in (an)aerobic conditions, at 15-37[deg]C for 48-150 hours at pH 3-6 in aeration and agitation conditions of 0-300 rpm. The medium contains either D-xylose or a vegetable hydrolyzate containing pentoses added to 1-7 g/l yeast extract (10-100 g/l).