Development of an advanced integrative process to create valuable biosugars including manno-oligosaccharides and mannose from spent coffee grounds

Nguyễn, Quỳnh Anh; Cho, Eun Jin; Lee, Dae-Seok; Bae, Hyeun‐Jong

doi:10.1016/j.biortech.2018.10.018

Cited by 60 publications

(33 citation statements)

References 32 publications

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“…A recent study has shown that 15 g of mannose could be obtained for every 100 g of spent coffee ground (SCG) after the removal of the non-saccharide content after delignification and defatting of SCG 43 . In the present study, 57.5 g of mannose could be obtained for every 100 g of in natura açaí seed, with a total mannose recovery of 98.6%.…”

Section: Resultsmentioning

confidence: 99%

High concentration and yield production of mannose from açaí (Euterpe oleracea Mart.) seeds via mannanase-catalyzed hydrolysis

Monteiro

Miguez

Silva

et al. 2019

Sci Rep

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The açaí seed corresponds to approximately 85% of the fruit’s weight and represents ~1.1 million metric tons of residue yearly accumulated in the Amazon region, resulting in an acute environmental and urban problem. To extract the highest value from this residue, this study aimed to evaluate its chemical composition to determine the appropriate applications and to develop conversion methods. First, mannan was confirmed as the major component of mature seeds, corresponding to 80% of the seed’s total carbohydrates and about 50% of its dry weight. To convert this high mannan content into mannose, a sequential process of dilute-acid and enzymatic hydrolysis was evaluated. Among different dilute-H 2 SO 4 hydrolysis conditions, 3%-acid for 60-min at 121 °C resulted in a 30% mannan hydrolysis yield and 41.7 g/L of mannose. Because ~70% mannan remained in the seed, a mannanase-catalyzed hydrolysis was sequentially performed with 2–20% seed concentration, reaching 146.3 g/L of mannose and a 96.8% yield with 20% solids. As far as we know, this is the highest reported concentration of mannose produced from a residue. Thus, this work provides fundamental data for achieving high concentrations and yields of mannose from açaí seeds, which could add commercial value to the seeds and improve the whole açaí productive chain.

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Section: Resultsmentioning

confidence: 99%

High concentration and yield production of mannose from açaí (Euterpe oleracea Mart.) seeds via mannanase-catalyzed hydrolysis

Monteiro

Miguez

Silva

et al. 2019

Sci Rep

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“…By down-regulating pectin biosynthesis via GAUT4, Biswal et al reported a reduction in the synthesis of homogalacturonan (HG) and rhamnogalacturonan II (RGII), which led to a decrease in recalcitrance in plant cell wall biomass, consequently increasing saccharification [25]. Figure 6 distinguishes between biomass from the wild-type and transgenic tobacco plants, with several apparent differences in their FT-IR spectra, including the disappearance of or significant reduction in peaks representing lignin and other non-saccharide compounds [2]. Adsorption peaks around 3,241.3-3,391.6 cm −1 were clearly observed in the wild-type tobacco plants, but they were reduced in the ChB-1 tobacco plants, indicating a lower abundance of free and intermolecular bonded O-H groups in the ChB-1 plants than in the wild-type plants.…”

Section: Enhanced Saccharification In the Enzymatic Conversion Of Biomentioning

confidence: 99%

“…Lignocellulosic biomass, particularly originating from crops, is abundant and available globally. It acts as an excellent source material for the production of biofuels and value-added products [1,2]. In order to develop biorefineries for processing lignocellulosic biomass, several challenges should be overcome, especially reducing enzyme costs and improving lignocellulosic materials to ensure that they can be hydrolyzed more easily.…”

Section: Introductionmentioning

confidence: 99%

“…html) and catalyze the hydrolysis of the β-glucosidic bond between two carbohydrate moieties, or between a carbohydrate and an aglucone moiety. In plants, β-glucosidases play important roles in growth and development, including the (1) release of active forms of phytohormones from their inactivated forms (conjugated-phytohormones), (2) formation of intermediates in cell wall lignification, (3) degradation of cell wall of the endosperm during germination, and (4) activation of chemical defense compounds [9][10][11][12]. Recently, β-glucosidases have garnered attention owing to their biotechnological and industrial applications.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Biomass Yield of and Saccharification in Transgenic Tobacco Over-Expressing β-Glucosidase

et al. 2020

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Here, we report an increase in biomass yield and saccharification in transgenic tobacco plants (Nicotiana tabacum L.) overexpressing thermostable β-glucosidase from Thermotoga maritima, BglB, targeted to the chloroplasts and vacuoles. The transgenic tobacco plants showed phenotypic characteristics that were significantly different from those of the wild-type plants. The biomass yield and life cycle (from germination to flowering and harvest) of the transgenic tobacco plants overexpressing BglB were 52% higher and 36% shorter than those of the wild-type tobacco plants, respectively, indicating a change in the genome transcription levels in the transgenic tobacco plants. Saccharification in biomass samples from the transgenic tobacco plants was 92% higher than that in biomass samples from the wild-type tobacco plants. The transgenic tobacco plants required a total investment (US$/year) corresponding to 52.9% of that required for the wild-type tobacco plants, but the total biomass yield (kg/year) of the transgenic tobacco plants was 43% higher than that of the wild-type tobacco plants. This approach could be applied to other plants to increase biomass yields and overproduce β-glucosidase for lignocellulose conversion.

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“…When this residue was pretreated by delignification and defatting and submitted afterwards to an enzymatic hydrolysis with a 10% w/w dry substrate loading at 45 • C and pH 4.8, a maximum oligosaccharides production yield is obtained between 4 h and 6 h after hydrolysis started. The highest yields were observed using a non-commercial pectinase, at 4.1 mg enzyme/g dry biomass, obtaining 38.2 g/L of DP62 MOS and 24.9 g/L of DP6 MOS (total yield 0.63 g/g DS) [117]. Rungruangsaphakun et al, on the other side, produced MOS using 16.52 U/mL of mannanase, with a solid loading of 15% of defatted copra meal, 50 • C and pH 6.…”

Section: Hemicellulosementioning

confidence: 95%

Production of Oligosaccharides from Agrofood Wastes

et al. 2020

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The development of biorefinery processes to platform chemicals for most lignocellulosic substrates, results in side processes to intermediates such as oligosaccharides. Agrofood wastes are most amenable to produce such intermediates, in particular, cellooligo-saccharides (COS), pectooligosaccharides (POS), xylooligosaccharides (XOS) and other less abundant oligomers containing mannose, arabinose, galactose and several sugar acids. These compounds show a remarkable bioactivity as prebiotics, elicitors in plants, food complements, healthy coadyuvants in certain therapies and more. They are medium to high added-value compounds with an increasing impact in the pharmaceutical, nutraceutical, cosmetic and food industries. This review is focused on the main production processes: autohydrolysis, acid and basic catalysis and enzymatic saccharification. Autohydrolysis of food residues at 160-190 • C leads to oligomer yields in the 0.06-0.3 g/g dry solid range, while acid hydrolysis of pectin (80-120 • C) or cellulose (45-180 • C) yields up to 0.7 g/g dry polymer. Enzymatic hydrolysis at 40-50 • C of pure polysaccharides results in 0.06-0.35 g/g dry solid (DS), with values in the range 0.08-0.2 g/g DS for original food residues.Fermentation 2020, 6, 31 2 of 27 forestall engineering approaches, to name a few. Lignocellulosic biomass, of any origin is, therefore, a most promising raw material for biorefineries, considering such facilities as integrated refineries turning biomass into fuels, platform chemicals, food, feed and materials using integrated processes with an optimized used of resources [4]. This vision can be extended to resources of aquatic origin (seaweed, seagrass and microalgae) as well as residues from livestock [5,6]. In general, apart from forestall and energy crops biomass, most of it depends on the production of biomass and, in particular, food wastes [7,8]. While more than 100,000 M tons of biomass wastes are yearly produced [7], wastes strictly considered as food wastes (foods not consumed from any part of the food supply chain or any part of the food that is non edible and, therefore, becomes a residue) account for more than 1300 M tons each year [8]. The valorization of biomass wastes into a plethora of useful energy vectors, chemical compounds and ingredients receives a notable amount of interest from all stakeholders, including researchers and entrepreneurs. They are a source to several value-added products, such as monosaccharides (glucose, xylose, mannose, fructose, arabinose and more), oligosaccharides (fructoor FOS, xylo-or XOS, galacto-or GOS, galacturonic-or GALOS, lactosucrose, etc.), biofuels (ethanol, butanol, dimethylether -DME-, biodiesel, hydrogen), bioactive compounds (flavonoids, phenolic acids, terpenes, terpenoids, carotenoids), nanocellulose (bacterial, wood-related), lignin and its derivatives (a source of aromatics from biomass and prospective substitute of the aromatic or BTEX fraction produced in oil refineries) [8]. Oligomers from cellulose, hemicellulose, lignin, pectin and oth...

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Development of an advanced integrative process to create valuable biosugars including manno-oligosaccharides and mannose from spent coffee grounds

Cited by 60 publications

References 32 publications

High concentration and yield production of mannose from açaí (Euterpe oleracea Mart.) seeds via mannanase-catalyzed hydrolysis

High concentration and yield production of mannose from açaí (Euterpe oleracea Mart.) seeds via mannanase-catalyzed hydrolysis

Enhanced Biomass Yield of and Saccharification in Transgenic Tobacco Over-Expressing β-Glucosidase

Production of Oligosaccharides from Agrofood Wastes

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