Valorisation of walnut shell and pea pod as novel sources for the production of xylooligosaccharides

Cebin, Aleksandra Vojvodić; Ralet, Marie‐Christine; Vigouroux, Jacqueline; Karača, Sara; Martinić, Arijana; Komes, Draženka; Bonnin, Estelle

doi:10.1016/j.carbpol.2021.117932

Cited by 27 publications

(10 citation statements)

References 42 publications

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“…In the case of the production of xylooligosaccharides, different strategies have been proposed. In one of the cases, the researchers proposed a first stage of delignification with NaClO 2 -CH 3 COOH and a second stage of alkaline extraction to recover the hemicelluloses that will later be enzymatically hydrolyzed [ 56 ], and on the other hand, the use of a single hydrothermal pretreatment stage [ 57 ]. In this latest work, lignin and cellulose nanocrystals are also produced after a second crganosolv delignification stage.…”

Section: Resultsmentioning

confidence: 99%

Apricot Seed Shells and Walnut Shells as Unconventional Sugars and Lignin Sources

et al. 2023

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The present study focuses on using apricot seeds shells and walnut shells as a potential renewable material for biorefinery in Ukraine. The goal of the research work was to determine the relationship between the chemical composition of solid residues from biomass after acid pretreatment with H2SO4, alkaline pretreatment with NaOH, and a steam explosion pretreatment and the recovery of sugars and lignin after further enzymatic hydrolysis with the application of an industrial cellulase Cellic CTec2. Apricot seeds shells and walnut shells consist of lots of cellulose (35.01 and 24.19%, respectively), lignin (44.55% and 44.63%, respectively), hemicelluloses (10.77% and 26.68%, respectively), and extractives (9.97% and 11.41%, respectively), which affect the efficiency of the bioconversion of polysaccharides to sugars. The alkaline pretreatment was found to be more efficient in terms of glucose yield in comparison with that of acid and steam explosion, and the maximum enzymatic conversions of cellulose reached were 99.7% and 94.6% for the solids from the apricot seeds shells and the walnut shells, respectively. The maximum amount of lignin (82%) in the residual solid was obtained during the processing of apricot seed shells submitted to the acid pretreatment. The amount of lignin in the solids interferes with the efficiency of enzymatic hydrolysis. The results pave the way for the efficient and perspective utilization of shells through the use of inexpensive, simple and affordable chemical technologies, obtaining value-added products, and thus, reducing the amount of environmental pollution (compared to the usual disposal practice of direct burning) and energy and material external dependency (by taking advantage of these renewable, low-cost materials).

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Section: Resultsmentioning

confidence: 99%

Apricot Seed Shells and Walnut Shells as Unconventional Sugars and Lignin Sources

et al. 2023

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“…XOS may be produced using commercially available xylan, however, in order to enable their economically viable production nowadays major focus has been placed on utilization of lignocellulosic biomass, which represents cheap source of xylan (34). Up to date, large number of lignocellulosic materials (wheat and rice straw, wheat and barley brans, sorghum and grape stalks, sugarcane bagasse, corncob, beechwood and birchwood) have been studied as xylan sources for XOS production with varying e ciency, mostly depending on the type of present xylan, and employed conversion methods (35). Therefore, different methods of XOS production and great diversity in potential xylan substrates lead to wide spectrum of different XOS structures with varied substituents of xylose backbone and degrees of polymerization that consequently have great impact on its prebiotic and other functional properties.…”

Section: Introductionmentioning

confidence: 99%

Sunflower meal valorization through enzyme-aided fractionation and production of emerging prebiotics

Simović,

Banjanac,

Veljković

et al. 2024

Preprint

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Sunflower meal, a plentiful and underutilized oil industry by-product, is currently discarded as waste or used as cheap component of animal feed with poor protein content and high content of complex carbohydrates. To harness its great potential for valorization, we propose an efficient method through enzyme-aided fractionation yielding 47.8% of hemicellulosic fraction, with simultaneous generation of various other potentially valuable fractions (including polyphenol-rich fraction, protein isolate, pectin, and lignin). According to the monomeric composition the main type of extracted hemicellulose was xylan with the common feature of a backbone of β-(1→4)-linked xylose residues, with a common substitution with arabinose moieties and some glucuronic acid residues. Subsequently, the xylan fraction underwent enzymatic treatment using commercial xylanase (ROHALASE® SEP-VISCO) to produce highly valuable compounds - emerging prebiotics xylo-oligosaccharides (XOS). Under optimized reaction conditions (70°C, pH 6 and enzyme concentration of 0.005% v/v using 5% w/v xylan solution) a yield of XOS with a polymerization degree DP<50 reached approximately 52.3% after 2 hours (majority of obtained product had DP<6 with predominance of XOS2 and XOS3 and without significant xylose generation).

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“…Owing to its richness in fibers and proteins (Lan et al 2018;Tassoni et al 2020), pea has been farmed and consumed worldwide since 8000 years, principally as a dry or pulse. In 2018, the global production of green peas was more than 21 million tons (Cebin et al 2021). In general, peas are classified into two classes: the vegetable type or garden pea and the legume type with dry or field peas.…”

Section: Introductionmentioning

confidence: 99%

“…Currently, efforts concerning valorization of these remains have triggered their re-utilization as sources of dietary fibers and functional ingredients in fortified food (beverages, pasta, cakes, breads…etc.) thanks to the proven physiological laxative effects, therapeutic benefits (antihypercholesterolaemic, hypoglycaemic, hepatoprotective, renoprotective, antioxidant and bifidogenic properties) and rheological/textural impacts of insoluble dietary fibers and xylooligosaccharides produced from the soluble dietary fibers (Seida et al 2014;Belghith Fendri et al 2016;Mejri et al 2019;Cebin et al 2021;Ramirez et al 2021). Beyond these uses, recent applications of pea pods have been developed including energy production (Nimbalkar et al 2018;Sahoo et al 2021) and synthesis of silver nanoparticles against drug resistant foodborne bacterial pathogens (Alarjani et al 2022).…”

Section: Introductionmentioning

confidence: 99%

Valorization of pea by-products for the isolation of cellulosic microfibers: extraction and physico-chemical characterization

BHIRI

Abidi

Bouallegue³

et al. 2022

Preprint

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Tremendous by-products are generated from food processes, which cause environmental and economic issues. The valorization of these low-priced wastes will, not only reduce these drawbacks, but also provide attractive raw materials for alternative sustainable technologies. The aim of this study was to explore the utilization of agro-industrial wastes, the pea pods, as renewable bio-sources for the isolation of cellulosic microfibers (CMFs). The CMFs were extracted applying a multi-step process (dewaxing, hot water, alkaline and chlorine-free bleaching treatments). The analysis of the raw material indicated that it contains 27.3 ± 0.700% wt α−cellulose, 17.3 ± 1.201% wt hemicelluloses and 14.94 ± 0.028% wt lignin, amongst other components. The yield, α-cellulose content and average thickness of the extracted CMFs were 26.1 ± 1.430%, 84.38 ± 0.37 % and 11 ± 0.905 µm, respectively. The discard of the majority of lignin and hemicelluloses from the surface of the fibers was checked by color study, scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), nuclear magnetic resonance (NMR) and thermogravimetry (ATG). The peaks exhibited by the isolated CMFs in X-ray diffraction patterns refer to the presence of type I cellulose with a crystallinity of 63.61%. Additionally, thermogravimetric analysis demonstrated the thermal stability of CMFs compared to the raw material. Data are promising for getting benefits from these vegetable wastes for cellulose isolation and its potential application in bio-based materials leading to an efficacious waste control.

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Valorisation of walnut shell and pea pod as novel sources for the production of xylooligosaccharides

Cited by 27 publications

References 42 publications

Apricot Seed Shells and Walnut Shells as Unconventional Sugars and Lignin Sources

Apricot Seed Shells and Walnut Shells as Unconventional Sugars and Lignin Sources

Sunflower meal valorization through enzyme-aided fractionation and production of emerging prebiotics

Valorization of pea by-products for the isolation of cellulosic microfibers: extraction and physico-chemical characterization

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