Fast microwave-assisted acidolysis: a new biorefinery approach for the zero-waste utilisation of lignocellulosic biomass to produce high quality lignin and fermentable saccharides

Abstract

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Production of fermentable species by microwave-assisted hydrothermal treatment of biomass carbohydrates: reactivity and fermentability assessments

“…Previous studies with M. pulcherrima reported that this yeast is capable of depolymerising long chain water-soluble oligosaccharides into short chain oligosaccharides; these latter being subsequently assimilated. 36 As described earlier, an increase in the S/W ratio decreases the amount of DP > 6 oligosaccharides in the liquids, producing a more accessible hydrolysate. Alternatively, alginic acid hydrolysates contained a particularly high level of inhibitors whereas there was negligible concentrations of inhibitors such as carboxylic acids and furans in the cellulose hydrolysates.…”

“…We recently reported that the yeast M. pulcherrima has excellent inhibitor tolerance and can metabolise a wide range of saccharide materials. 36 To assess the effect of the MW processing conditions on the fermentability of the hydrolysate from the three carbohydrates, M. pulcherrima was cultured in 24 well plates on the hydrolysate with additional N, P and microelements added. The yeast biomass growth is shown in Fig.…”

“…Several processes have been addressed for biomass pyrolysis, 9,[17][18][19][20][21][22][23][24] hydrothermal depolymerisation, 17,18,22,[25][26][27][28][29][30] fractionation and solvolysis. 18,[31][32][33][34][35][36][37][38] Microwave heating is based on the high frequency rotation of polar molecules, which produces a quicker and higher heating of the species with high polarity. [17][18][19][25][26][27]33,39 As lignin has a lower polarity than cellulose and hemicellulose, it is less active during microwave heating.…”

Techno‐economic analysis (TEA) of microbial oil production from waste resources as part of a biorefinery concept: assessment at multiple scales under uncertainty

“…One promising route to SCO is through oleaginous wine yeast Metschnikowia pulcherrima . The yeast can produce up to 40% oil content per cell through catabolism of a wide range of oligosaccharides and monosaccharides . Excitingly, the yeast can be cultured in nonsterile conditions due to a combination of culturing at low pH and production of antimicrobials.…”

Development of a microwave pretreatment for the extraction of active compounds from natural by products

“…In addition, a preference for glucose depolymerization was observed. Other authors have also found fruitful results when microwaves are implemented into hydrolysis processes (Zhou et al, 2017b, Zhou et al, 2017a, Li et al, 2018, Carnaroglio et al, 2015.…”