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Aqueous Extraction of the Sulfated Polysaccharide Ulvan from the Green Alga Ulva rigida—Kinetics and Modeling
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2017 (English)In: Bioenergy Research, ISSN 1939-1234, E-ISSN 1939-1242, Vol. 10, no 3, 915-928 p.Article in journal (Refereed) Published
Abstract [en]

The incentives for utilizing a versatile range of renewable feedstocks in novel ways are continuously increasing. Sulfated polysaccharides from green algae, such as ulvan, are interesting due to the rare sugar constituents which can be utilized for new materials and chemicals in industry. However, before valorization fractionation needs to be performed in a controlled way. In the current work, the kinetics of the aqueous extraction of ulvan was studied in the temperature range 60–130 °C. The highest yield of 97.6 wt.% was attained after 2 h of extraction at 130 °C, and the extraction efficiency was observed to be heavily temperature dependent. Interestingly, two regimes of extraction kinetics were observed, presumably due to the different ulvan fractions contained within the cell wall of green algae. The experimental data was modeled with first-order kinetics, and an apparent activation energy of 53.8 kJ mol−1 was obtained for the process. The algal residue was processed using simultaneous saccharification and fermentation, and 0.48 g ethanol g−1 of sugars was obtained.

Place, publisher, year, edition, pages
2017. Vol. 10, no 3, 915-928 p.
Keyword [en]
Green algae Bio-ethanol Extraction Kinetics Ulvan Rhamnose
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:umu:diva-138167DOI: 10.1007/s12155-017-9853-4OAI: oai:DiVA.org:umu-138167DiVA: diva2:1131595
Available from: 2017-08-15 Created: 2017-08-15 Last updated: 2017-08-15

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Publisher's full texthttps://doi.org/10.1007/s12155-017-9853-4

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Mikkola, Jyri-Pekka
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CiteExportLink to record
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