Implementation of Auto-Hydrolysis Process for the Recovery of Antioxidants and Cellulose from Wheat Straw

Bassani, Andrea; Fiorentini, Cecilia; Vadivel, Vellingiri; Moncalvo, Alessandro; Spigno, Giorgia

doi:10.3390/app10176112

Cited by 24 publications

(30 citation statements)

References 58 publications

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“…Due to the higher levels of xylose obtained by our approach, we conclude that especially hemicelluloses were more efficiently hydrolyzed from wheat straw steam-exploded in the presence of dH 2 O. Probably the presence of water facilitates autohydrolysis-like processes of hemicelluloses [36] in the early phase of the steam explosion reaction [37][38][39]. Likewise, when impregnated with water, softwood showed enhanced breakdown upon steam explosion with similar severity factors [40].…”

Section: Discussionmentioning

confidence: 93%

Optimization of steam explosion parameters for improved biotechnological use of wheat straw

Sulzenbacher

Atzmüller

Hawe

et al. 2021

Biomass Conv. Bioref.

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Using lignocellulosic raw materials as substrate for biotechnological applications has been a focus of research during the last two decades. They contain sugars, which can be used in industrial fermentation processes, in from of polysaccharides (cellulose, hemicellulose). Wheat straw, one representative of lignocellulosic materials, is sustainably and abundantly available, especially in Europe and North America. However, wheat straw, just like any other lignocellulosic material, needs to be pretreated in one way or the other in order to generate sufficient quantities of monosaccharides. One widely used pretreatment for lignocellulosic material is steam explosion combined with enzymatic hydrolysis. In this study, the effects of steam exploding wheat straw in combination with water are presented. By impregnation with water, saccharide yields from subsequent enzymatic hydrolysis increased from 18.8 to 22.6 g L−1 for glucose and 13.8 to 16.4 g L−1 for xylose, respectively. Moreover, the basic steam explosion parameters residence time and temperature were optimized in ranges from 5 to 20 min and 180–200 °C. This further optimization increased the maximum saccharide yield to 41.2 g L−1 for glucose (200 °C, 15 min) and 18.9 g L−1 for xylose (190 °C, 10 min). Finally, the growth of the intensively investigated biotechnological production host Yarrowia lipolytica on hydrolysates derived from different steam explosion parameters was evaluated. Y. lipolytica grew well in media containing up to 90% wheat straw hydrolysate as sole carbon source, demonstrating the potential as substrate for biotechnological processes.

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Section: Discussionmentioning

confidence: 93%

Optimization of steam explosion parameters for improved biotechnological use of wheat straw

Sulzenbacher

Atzmüller

Hawe

et al. 2021

Biomass Conv. Bioref.

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“…The autohydrolysis of agave bagasse at 160 ℃ for 50 min showed that it had a main component as cellulose (35%), followed by lignin (25%) and hemicellulose (6%) [31]. The previous study presented that cellulose (78%), lignin (6%) and hemicellulose (1%) constituted the solid phase of autohydrolyzed wheat straw (at 190℃ for 15 minutes) [43]. It was reported that the xylan content in the solid residues decreases with the increase of the pretreatment temperature [17,19].…”

Section: Resultsmentioning

confidence: 99%

Xylose Release from Sunflower Stalk by Coupling Autohydrolysis and Enzymatic Post-Hydrolysis

HALICI-DEMİR

Akpınar

2021

Waste Biomass Valor

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The purpose of this study was to obtain xylose-based fermentation media from autohydrolysis liquors of sun ower stalk by using commercial xylanase formulation. Xylose is generally produced from xylan by diluted acid hydrolysis that causes the formation of some unwanted compounds during the process. As an alternative to dilute acid hydrolysis method, enzymatic hydrolysis of xylan can provide more speci c hydrolysis under moderate conditions and does not cause the formation of undesirable compounds. In this study, xylose production carried out with Trichoderma longibrachiatum xylanase on solubilized xylan form of sun ower stalk, which was hydrothermally pretreated for 1 hour at 160ºC. The effects of substrate concentration and enzyme activity were investigated for the production of xylose. To obtain a high xylose yield and selectivity, the optimization study was conducted by the response surface methodology. The optimum substrate concentration and enzyme activity were found as 60 mg ds/mL CAL and 234 U/mL, respectively. Under the optimum condition, xylose yield and selectivity were found to be 69.5% and 8.2 g/g, respectively. This study showed that xylose could be produce with a high yield without requiring a neutralization process and corrosive chemical reagent apart from water. Statement Of NoveltyThis study presented an alternative route for manufacturing xylose-based fermentation media from sun ower stalk in an environmentally friendly way. Xylose production from sun ower stalk was accomplished by coupling the hydrothermal treatment with the enzymatic post-hydrolysis. The suggested method did not require the neutralization process and did not produce the neutralization products. This study is providing useful information for the future study of the production of xylitol with fermentation and contributing the information for the commercial microbial manufacture of xylitol.

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“…Taking into account the chemical composition of the spent solid recovered in the autohydrolysis of melon peels at 140 °C, it would be plausible to implement a second autohydrolysis step to obtain a solid fraction enriched in cellulose with potential applications, and a liquid fraction with a higher phenolic content [ 78 ]. For instance, this cellulose would be suitable for the biotechnological production of fermentable sugars, or for the production of nanocellulose [ 13 ].…”

Section: Resultsmentioning

confidence: 99%

Environmentally Friendly Hydrothermal Processing of Melon by-Products for the Recovery of Bioactive Pectic-Oligosaccharides

Rico

Gullón

Yáñez

2020

Foods

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Melon by-products, that currently lack high value-added applications, could be a sustainable source of bioactive compounds such as polysaccharides and antioxidants. In this work, melon peels were extracted with water to remove free sugars, and the water-insoluble solids (WISs) were subjected to hydrothermal processing. The effect of temperature on the composition of the obtained liquors and their total phenolic content was evaluated. The selected liquors were also characterized by matrix assisted laser desorption/ionization-time of flight mass spectroscopy (MALDI-TOF MS), fourier transform infrared spectroscopy (FTIR) and high performance anion exchange chromatography with pulsed amperometric detection (HPAEC–PAD), and its phenolic compounds were identified and quantified by high-performance liquid chromatography-diode array detector-tandem mass spectrometry (HPLC–DAD–MS/MS). In addition, the spent solids from the hydrothermal treatment were characterized and their potential use was assessed. At the optimal conditions of 140 °C (severity 2.03), the total oligosaccharide yield accounted for 15.24 g/100 g WIS, of which 10.07 g/100 g WIS were oligogalacturonides. The structural characterization confirmed the presence of partially methyl esterified oligogalacturonides with a wide range of polymerization degrees. After precipitation, 16.59 g/100 g WIS of pectin were recovered, with a galacturonic acid content of 55.41% and high linearity.

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Implementation of Auto-Hydrolysis Process for the Recovery of Antioxidants and Cellulose from Wheat Straw

Cited by 24 publications

References 58 publications

Optimization of steam explosion parameters for improved biotechnological use of wheat straw

Optimization of steam explosion parameters for improved biotechnological use of wheat straw

Xylose Release from Sunflower Stalk by Coupling Autohydrolysis and Enzymatic Post-Hydrolysis

Environmentally Friendly Hydrothermal Processing of Melon by-Products for the Recovery of Bioactive Pectic-Oligosaccharides

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