Microbial Biotechnologies to Produce Biodiesel and Biolubricants from Dairy Effluents

• DOI: 10.3390/fermentation10060278
• Publication Date: 2024-05-24T15:17:52Z
• Authors: Grazia Federica B...; Claudio Mandalà; Carmela Anna Migl...; Lucia Giansante; Luciana Di Giacinto; Laura Bardi
• Keywords: scotta; biorefineries; 0106 biological sciences; TP500-660; single-cell oil; oleaginous yeasts; Fermentation industries. Beverages. Alcohol; circular economy; <i>Lipomyces starkeyi</i>; 01 natural sciences

The shift from fossil fuels to renewable energy sources is crucial in addressing environmental challenges. Vegetable oils have been focused on as the main potential source for biodiesel and biolubricant production. However, due their fatty acid (FA) composition they are characterized by low stability oxidation variable viscosity. Single-cell (SCOs) oleaginous microorganisms a possible alternative vegetable oils: more suitable, it can further be improved controlling fermentation’s physiological conditions. In present study, production of SCOs with targeted technological properties Lipomyces starkeyi fermentation under controlled temperatures was assessed. A dairy effluent (scotta) used substrate improve economic sustainability process. Batch aerobic fermentations were carried out fermenter at two different (25 °C 30 °C). yields SCO FA profiles analyzed. highest biomass (9.76 g L−1) microbial oil (1.83 obtained °C. Furthermore, significantly lower content (46% vs. 55%) unsaturated FAs higher (11% 1.5%) shorter-chain saturated FAs, myristic almost matching stearic acid, detected comparison 25 Very peroxide values also found (0.14 meq O2 kg−1 0 These results indicate that these highly oxidation-resistant, temperature improves oxidative tribophysical features. biodiesels’ properties, calculated composition, within limits both U.S. standards E.U. regulations. Then, produced L. effluents considered suitable produce biolubricants.