期刊
BIOMASS & BIOENERGY
卷 137, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.biombioe.2020.105555
关键词
Biofuels; Biorefinery; DHA/EPA; Marine; Plinks; Thermophiles; Lignocellulosic biomass
资金
- Deakin University
- DBT-IOC Centre for Advance Bioenergy Research, Indian Oil RD Centre, India
- DIRI program of Deakin University
Lignocellulosic biomass represents a promising feedstock for supplying biofuels and other useful bioproducts in near future. As an example of process innovation, this study describes an integrated microbial fermentation process involving a thermoanaerobe and a marine thraustochytrid, aiming at the co-production of docosahexaenoic acids and bioethanol from rice straw biomass as substrate. Key points of the process are: (a) consolidated bioprocessing of pretreated rice straw biomass to bioethanol (anaerobic fermentation) resulting into 1.8 g L-1 bioethanol and 29.40% solubilization of rice straw biomass; (b) utilization of spent lignocellulose derived sugars in microalgal fermentation (aerobic fermentation) with subsequent promising cell growth (2.77 g L-1), substantial lipids (17.05%) and docosahexaenoic acids production (44.0% of total fatty acids). Other major fatty acids (as total fatty acid %) were palmitic acid (13.95%), stearic acid (5.07%), eicosapentaenoic acid (7.24%), and docosapentaenoic acid (16.12%). This study provides a new route for marine algae utilization of lignocellulosic biomass for co-production of bioethanol and value-added bioproducts.
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