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Roles of Co-solvents in hydrothermal liquefaction of low-lipid, high-protein algae
- Source :
- Bioresource Technology. 310:123454
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- Valorization of algal biomass is often limited by its low lipid content. Here, different alcohols: ethanol, isopropanol, and glycerol, were studied as co-solvents to improve the conversion efficiency of a lipid-poor microalgae, Galdieria sulphuraria, by hydrothermal liquefaction. Bio-crude oil yield increases, from 13 to 73 wt% (on dry algae basis), were attributed to the alcohols facilitating the transfer of algal protein-derived fragments from the aqueous phase into the oil phase. A series of characterization results showed that bio-crude oil formation was mainly the result of alcohols reacting with algal fragments via Maillard reactions, alkylation, and esterification, respectively. Insights into the synergistic effect of low-lipid feed and alcohol provide mechanistic support for choosing an alcohol-rich waste, crude glycerol, to improve bio-crude oil production from HTL of wastewater-grown G. sulphuraria. Promising improvements in yield and energy recovery indicates competitive economics for a low-lipid biomass waste-to-biofuel conversion technique.
- Subjects :
- 0106 biological sciences
Environmental Engineering
Biomass
Bioengineering
Alcohol
010501 environmental sciences
01 natural sciences
chemistry.chemical_compound
symbols.namesake
010608 biotechnology
Microalgae
Glycerol
Organic chemistry
Waste Management and Disposal
0105 earth and related environmental sciences
Ethanol
Renewable Energy, Sustainability and the Environment
Galdieria sulphuraria
Temperature
Water
General Medicine
Lipids
Hydrothermal liquefaction
Maillard reaction
chemistry
Biofuels
Yield (chemistry)
Solvents
symbols
Subjects
Details
- ISSN :
- 09608524
- Volume :
- 310
- Database :
- OpenAIRE
- Journal :
- Bioresource Technology
- Accession number :
- edsair.doi.dedup.....d763c1a0c45a2887300b7114527724bc
- Full Text :
- https://doi.org/10.1016/j.biortech.2020.123454