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<p>The growing demand for sustainable bioresources has given prominence to lignocellulosic biomass as a possible alternative. Halophytes offer a specific advantage in this context, because they can grow on non-arable land with minimal freshwater requirements. To our knowledge, this is the first study to integrate organosolv fractionation to either Soxhlet extraction (SLE) or subcritical water extraction, (SWE) at 140&#xa0;°C, as pretreatment strategies, into a single sequential process applied to halophyte biomass allowing the recovery of bioactive molecules from halophyte biomass. The spent fibers underwent organosolv fractionation under varied process conditions (180–200&#xa0;°C, 15–60&#xa0;min, 40–60% v/v ethanol) and were subsequently evaluated for bioenergy production via anaerobic digestion. Organosolv fractionation generates separate lignin and hemicellulose streams, which can be further converted into value-added products. Either extraction methodology effectively facilitated subsequent biomass fractionation. SLE-pretreated fibers attained &gt; 96.4% hemicellulose removal in 87.5% of the tested conditions and 78.1% delignification. SWE-pretreated fibers exhibited slightly lower hemicellulose removal at higher (60% v/v) ethanol content and 69.3% delignification. Crucially, SWE fibers demonstrated superior bioenergy potential, achieving a methane yield of 336 mL-CH<sub>4</sub>/gVS, and complete saccharification in 62.5% of tested conditions. Our findings highlight the potential of synergistic pretreatment strategies in an integrated biorefinery approach, which valorizes halophytes as a sustainable feedstock for bio-based applications.</p>

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Sequential extraction and organosolv pretreatment of halophytes: unlocking biomass recalcitrance for bio-based production

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月9日

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  • Maxwel Monção,
  • Ahmed Al-Dubai,
  • Aadila Cayenne,
  • Hinrich Uellendahl,
  • Ulrika Rova,
  • Paul Christakopoulos,
  • Leonidas Matsakas

摘要

The growing demand for sustainable bioresources has given prominence to lignocellulosic biomass as a possible alternative. Halophytes offer a specific advantage in this context, because they can grow on non-arable land with minimal freshwater requirements. To our knowledge, this is the first study to integrate organosolv fractionation to either Soxhlet extraction (SLE) or subcritical water extraction, (SWE) at 140 °C, as pretreatment strategies, into a single sequential process applied to halophyte biomass allowing the recovery of bioactive molecules from halophyte biomass. The spent fibers underwent organosolv fractionation under varied process conditions (180–200 °C, 15–60 min, 40–60% v/v ethanol) and were subsequently evaluated for bioenergy production via anaerobic digestion. Organosolv fractionation generates separate lignin and hemicellulose streams, which can be further converted into value-added products. Either extraction methodology effectively facilitated subsequent biomass fractionation. SLE-pretreated fibers attained > 96.4% hemicellulose removal in 87.5% of the tested conditions and 78.1% delignification. SWE-pretreated fibers exhibited slightly lower hemicellulose removal at higher (60% v/v) ethanol content and 69.3% delignification. Crucially, SWE fibers demonstrated superior bioenergy potential, achieving a methane yield of 336 mL-CH4/gVS, and complete saccharification in 62.5% of tested conditions. Our findings highlight the potential of synergistic pretreatment strategies in an integrated biorefinery approach, which valorizes halophytes as a sustainable feedstock for bio-based applications.