ENHANCEMENT OF LACTIC ACID FERMENTATION BY LACTOBACILLUS DELBRUECKII ATCC 6949 USING SUGARCANE MOLASSES Page No: 773-778

Francisca Pessôa de França, Auta Marieta de Jesus and Fernando Jorge Santos Oliveira

Keywords: Lactic acid, Lactobacillus delbrueckii, sugarcane molasses, lactic fermentation.

Abstract: Experiments for lactic acid production from sugarcane molasses, an agro-industrial residue, were performed using Lactobacillus delbrueckii ATCC-6949. The effects of medium agitation, inoculum age, inoculum size, and heightdiameter ratio (H/D) of the bioreactor on the organic acid production were investigated. The tests employed a mechanically agitated reactor equipped with temperature, agitation and pH controllers. The best reaction yield obtained was 96%. For that, the following bioprocess conditions were employed: inoculum age of 24 hours, 5% inoculum size, bioreactor height-diameter ratio of 1.5, and agitation of 200 rpm.



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