Volatile Fatty Acids from Lipid-Extracted Yeast Provide Additional Feedstock for Microbial Lipid Production

Microbial lipid production from oleaginous yeasts is a promising process for the sustainable development of microbial biodiesel industry. However, feedstock cost poses an economic problem biodiesel. After extraction, yeast biomass can be used as organic source production. In this study, volatile fatty acids (VFAs), produced via anaerobic digestion lipid-extracted (LEY) residue, were utilized carbon Cryptococcus curvatus. The response surface methodology was to determine initial pH and inoculum volume optimal VFA experimental result concentration 4.51 g/L at 9 inoculation 25%. optimization results showed that maximal 4.58 8.40 39.49%. This study indicates VFAs LEY production, with potential significantly reduce costs.