期刊
ENERGY CONVERSION AND MANAGEMENT
卷 234, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.enconman.2021.113908
关键词
Carotenoid; Dunaliella salina; Food waste hydrolysate; Fulvic acid; Lipid
资金
- Science and Technology Commission of Shanghai Municipality [20ZR1423900]
- National Natural Science Foundation of China (NSFC) Shandong Joint Fund [U1706209]
- Natural Science Foundation of China [51908244]
- China Postdoctoral Science Foundation [2018 M643363, 2019 T120789]
This study demonstrated the feasibility of using low-value food waste and fulvic acid for mixotrophic cultivation of D. salina, maximizing the production of biomass, lipids, and carotenoids.
Dunaliella salina is a promising microbial host for the sustainable production of bioenergy and valuable compounds. D. salina can be mixotrophically cultivated using a pure organic carbon source. However, pure organic carbon sources remarkably enhance the cost of cultivation and constrain the development of upscale microalgal cultivation. This study examined the feasibility of using low-value food waste supplemented with fulvic acid in D. salina mixotrophic cultivation for lipid and carotenoid accumulation. The glucose-rich hydrolysate was first obtained via enzymatic hydrolysis from selected food waste. This hydrolysate was an appropriate source of organic carbon for microalgal mixotrophy based on a two-stage cultivation strategy for investigating the biomass and accumulation of valuable products. In addition, fulvic acid, which contains oxygen-rich and carbon-poor functional groups, was used in the second stage to maximise the production of biomass (3.1 ? 0.2 g/L), lipids (0.75 ? 0.03 g/L) and carotenoids (0.52 ? 0.03 g/L). The biodiesel quality of the lipid derived from D. salina biomass based on food waste hydrolysate met the previously approved standards. These data illustrate a sustainable and efficient algal-based food waste biorefinery strategy for the co-production of bioenergy and bioactive compounds, and offer key insights to address the issues of global food waste and algal-based resource utilisation.
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