Mild alkali-pretreatment effectively extracts guaiacyl-rich lignin for high lignocellulose digestibility coupled with largely diminishing yeast fermentation inhibitors in Miscanthus

Steam explosion distinctively enhances biomass enzymatic saccharification of cotton stalks by largely reducing cellulose polymerization degree in G. barbadense and G. hirsutum

“…Principally, the two chemicals have distinct mechanisms for biomass depolymerization. Alkali pretreatment can mostly cause the dissociation of entire wall polymers whereas acid pretreatment induces the partial release of monosaccharides, oligosaccharides, and lignin monomers (Xu et al, 2012;Li et al, 2014a). However, steam explosion has been increasingly considered as an economical and environment-friendly pretreatment by largely reducing biomass particle size, and partially removing hemicelluloses and lignin (Alvira et al, 2010;Kumar et al, 2009).…”

“…Principally, biomass conversion involves three major steps: physical and chemical pretreatments for cell wall destruction, enzymatic hydrolysis for soluble sugar release, and yeast fermentation for ethanol production (Wu et al, 2013). However, plant cell wall composition and wall polymer features crucially determine biomass recalcitrance, resulting in a costly lignocellulosic digestion and numerous inhibitory compounds released that inhibit the yeast fermentation (Alvira et al, 2010;Li et al, 2014a). As pretreatment is the initial step, it is important to find out an optimal approach that not only enhances biomass enzymatic saccharification but also releases less yeast fermentation inhibitors.…”

Advances in Genetic Manipulation of Lignocellulose to Reduce Biomass Recalcitrance and Enhance Biofuel Production in Bioenergy Crops

“…[126]. Moreover, IL pretreatment could improve lignocellulose enzymatic saccharification in biomass samples with low cellulose CrI and low lignin levels [127][128][129][130], by comparison mild alkali pretreatment in Miscanthus efficiently extracts G-rich lignin for high biomass digestibility [125]. Recently, in Miscanthus stem have presented that two-step pretreatments with 2% NaOH and 1% H 2 SO 4 are optimal for improving biomass digestion in hemicelluloses-rich samples via the efficient co-extraction of hemicelluloses and lignin [131][132][133][134][135].…”

A combined sodium phosphate and sodium sulfide pretreatment for enhanced enzymatic digestibility and delignification of corn stover

“…All of these outcomes from alkaline pretreatment ameliorate cellulase accessibility and thereby cellulose digestibility Kim et al, 2014;Mosier et al, 2005). Sodium hydroxide is one of the most commonly used alkali-based pretreatment reagents that could effectively remove lignin from lignocelluloses with little formation of sugar degradation compounds and furan derivatives, but it's less satisfactory if applied to lignin-rich lignocelluloses (Li et al, 2014) and the recovery of NaOH requires combustion of the black liquor and followed by an expensive causticization process.…”