Oenococcus oeni cells immobilized on delignified cellulosic material for malolactic fermentation of wine.

Oenococcus oeni ATCC 23279 cells immobilized on delignified cellulosic material (DCM) were used for malolactic fermentation (MLF). In first, eleven repeated alcoholic fermentation batches of white must of 11-12 degrees Be initial density were performed by Saccharomyces cerevisiae cells immobilized on delignified cellulosic material at 20 degrees C. Subsequently, the induction of MLF in the eleven taken wine batches by O. oeni cells immobilized on DCM took place at 27 degrees C. From the 3rd MLF batch up to 10th, the malic acid degradation was 53.1 up to 67.4% and the cfu of the immobilized cells/g of biocatalyst remained stable. The produced lactic acid was less than the stoichiometric yield and acetic acid content was significantly reduced after MLF not contributing in an important increase of the volatile acidity of wine. Ethanol, higher alcohols acetaldehyde and diacetyl contents in wines after MLF were in acceptable levels.