Comparative study of lipid production from cellulosic ethanol fermentation wastewaters by four oleaginous yeasts. Issue 7 (2nd August 2021)

• Record Type: Journal Article
• Authors: Yao, Shimiao; Xiong, Lian; Chen, Xuefang; Li, Hailong; Chen, Xinde
• Is Part Of: Preparative biochemistry & biotechnology. Volume 51:Issue 7(2021)
• Page Start: 669
• Page End: 677
• Publication Date: 2021-08-02
• Subjects: CEW -- COD degradation -- lipid production -- oleaginous yeasts; Biochemistry -- Technique -- Periodicals; Biotechnology -- Technique -- Periodicals; Biochemistry -- methods -- Periodicals; Biotechnology -- methods -- Periodicals; 660.6
• DOI: 10.1080/10826068.2020.1852416
• Languages: English
• ISSNs: 1082-6068

Abstract

Abstract: The biochemical treatment of cellulosic ethanol wastewater (CEW) is considered to be an ideal green process. To screen out the best oleaginous yeastfor the utilization of cellulosic ethanol wastewater, four oleaginous yeasts ( Trichosporon cutaneum, Rhorosporidium toruloides, Cryptococcus albidus and T. coremiiforme ) were compared to assess their abilities for lipid production in terms of biomass production, lipid content and lipid yield. Furthermore, thechemical oxygen demand (COD) conversion rate, COD degradation and fatty acid composition were calculated to analyze the effect of wastewaters treatment. According to the fermentation results, the highest biomass and lipid yield of T. cutaneum in CEW were 20.945 and 1.56 g/L, respectively, while the R. toruloides reached the highest lipid content (17.32%). The maximum conversion rates of T. cutaneum are 73.64 and 6.06%, respectively, in terms of conversion yield of biomass/COD and lipids/COD. The content of fatty acids showed that after six days' fermentation, T. coremiiforme obtained the highest unsaturated fatty acid content, the content of C18:1 and C18:2 was 57.64%. This study suggests that T. cutaneum has great potential for lipid production and wastewaters treatment from cellulosic ethanol fermentation. Graphical Abstract: UF0001 Highlights: Four oleaginous yeasts were used for lipid production. Cellulosic ethanol fermentation wastewater as growth medium for lipid production. Biomass and lipid yield of Trichosporon cutaneum showed potential for lipid production. Chemical oxygen demand conversion rate and chemical oxygen demand degradation of Trichosporon cutaneum showed potential for wastewater treatment.