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

Research output: Contribution to journalJournal articleResearchpeer-review

4 Citations (Scopus)

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 languageEnglish
JournalApplied Microbiology and Biotechnology
Volume101
Issue number4
Pages (from-to)1769–1779
Number of pages11
ISSN0175-7598
DOIs
Publication statusPublished - Feb 2017

Keywords

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

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