期刊
BIORESOURCE TECHNOLOGY
卷 197, 期 -, 页码 310-317出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2015.08.091
关键词
Laminaria digitata; Bioethanol; Enzymatic hydrolysis; Protein; Amino acid profile
资金
- Danish Council for Strategic Research, as part of the MacroAlgaeBiorefinery (MAB3) project
A wild-growing glucose-rich (i.e. 56.7% glucose content) brown seaweed species Laminaria digitata, collected from the North Coast of Denmark in August 2012, was used as the feedstock for an integrated bioethanol and protein production. Glutamic acid and aspartic acid are the two most abundant amino acids in the algal protein, both with proportional content of 10% in crude protein. Only minor pretreatment of milling was used on the biomass to facilitate the subsequent enzymatic hydrolysis and fermentation. The Separate Hydrolysis and Fermentation (SHF) resulted in obviously higher ethanol yield than the Simultaneous Saccharification and Fermentation (SSF). High conversion rate at maximum of 84.1% glucose recovery by enzymatic hydrolysis and overall ethanol yield at maximum of 77.7% theoretical were achieved. Protein content in the solid residues after fermentation was enriched by 2.7 fold, with similar distributions of amino acids, due to the hydrolysis of polymers in the seaweed cell wall matrix. (C) 2015 Elsevier Ltd. All rights reserved.
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