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Development of an innovative macroalgae biorefinery: Oligosaccharides as pivotal compounds
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Abstract(s)
ABSTRACT: Macroalgae have significant advantages over land-living biomass resources and are promising pivotal feedstocks for the onset of the blue bioeconomy. Among these, Ulva lactuca has demonstrated a high potential due to its wide distribution and high productivity. In this work, a detailed chemical characterization of U. lactuca enabled the identification of polysaccharides as the main macromolecular component of the organic fraction. They present a high diversity of sugar constituents and hence can be a relevant source of added-value oligosaccharides for the food/feed industries. Four processes, with increasing operational temperatures, were compared for the selective production of oligosaccharides: Conventional Soxhlet Extraction, Accelerated Solvent Extraction, Hydrothermal treatment (HT) and Dilute Acid Hydrolysis (DAH). All processes presented high oligosaccharide/monosaccharide ratios, with HT and DAH exhibiting the highest oligosaccharides yields (10.6 and 16.6 g/100 g initial biomass, respectively). These oligosaccharides were obtained under milder, more economic conditions than the reported for lignocellulosic (land) plants and can represent an important added-value income of the algae biorefineries and thus contribute to their economic sustainability.
Description
Keywords
Biomass Bioethanol Biorefinery Solvent extraction Acid hydrolysis Oligosaccharides Hydrothermal treatment Pre-treatment Extraction
Citation
Andrade, Cristiana... [et.al.] - Development of an innovative macroalgae biorefinery: Oligosaccharides as pivotal compounds. In: Fuel, 2022, vol. 320, article nº 123780
Publisher
Elsevier