Exopolysaccharyde production by Cryptococcus laurentii SD7 using molasses and corn steep liquor as substrates

Microbial polysaccharides are of great biotechnological and commercial interest have wide application in the food, cosmetic medicine industries. Exopolysaccharide (EPS) production by yeast Cryptococcus laurentii SD7, isolated from fresh water molluscs, was studied using agro-industrial byproducts as substrates submerged fermentation. The Central Composite Design (CCD) 23 used to study influence pH, different concentrations on sugarcane molasses corn steep liquor (CSL), for 48 hours. According results, highest EPS occurred at initial pH 5 8.4% concentration molasses, which were statistically significant variable 10% (p < 0.1). CSL had no range, thus, it can be lowest (0.3%). time course showed that while cell growth peaked within hours, (6.61 g L-1) 168 with a productivity about 0.04 L-1 h-1. medium remained approximately constant throughout fermentation process. C. SD7 potential low cost sustainable substrates.