Wet fractionation of the succulent halophyte Salicornia sinus-persica, with the aim of low input (water saving) biorefining into bioethanol

Ayah Alassali, Iwona Cybulska, Alejandro Ríos Galvan, Mette Hedegaard Thomsen

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    13 Scopus citations

    Abstract

    In this study Salicornia sinus-persica, a succulent halophyte was assessed for its potential to be used as a feedstock for bioethanol production. For such succulent, salty, green biomasses, direct fractionation and fermentation allow for water preservation in the process. Fresh biomass of S. sinus-persica was collected and split into two fractions by wet fractionation; liquid (juice) and solid (pulp). Sugar contents were found to be 1.0–1.5% for the juice fraction and 50% (w/w) for the fresh pulp. Direct fermentation of the juice using Saccharomyces cerevisiae showed no salt inhibition of the yeast and ethanol yields of ~70% were achieved. A pretreatment study was carried out for the pulp fraction applying mild hydrothermal pretreatment. Cellulose convertibility was found to be significantly higher for severity factors above 2.00, and the highest ethanol yield (76.91 ± 3.03%) was found at process severity of 3.06 (170 °C, 10 min).

    Original languageBritish English
    Pages (from-to)1769-1779
    Number of pages11
    JournalApplied Microbiology and Biotechnology
    Volume101
    Issue number4
    DOIs
    StatePublished - 1 Feb 2017

    Keywords

    • Bioethanol
    • Biomass
    • Green biorefinery
    • Halophyte
    • Hydrothermal pretreatment
    • Salicornia sinus-persica

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