Spent coffee ground mass solubilisation by steam explosion and enzymatic hydrolysis

Chiyanzy, Idan; Brienzo, Michel; García-Aparicio, María; Agudelo, Roberto A.; Görgens, Johann F.

doi:10.1002/jctb.4313

Cited by 28 publications

(18 citation statements)

References 30 publications

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“…[4][5][6][7][8] Some of them have suggested the used of SCG as a source of oil for biodiesel production; 5 others have proposed the application of SCG as a source of recoverable sugars that can be extracted and employed as food addictive or for bioethanol production. [9][10][11][12] Several works have reported the study of SCG constituents and their application in the food and nutraceutical industries. 3,8,[13][14][15] In particular, they were focused on caffeine and chlorogenic acids characterization and on total phenolic and flavonoids content.…”

Section: Introductionmentioning

confidence: 99%

“…For this reason, in the latest years, several authors have proposed original mechanisms to reuse SCG, in order to manage and reduce its disposal 4–8 . Some of them have suggested the used of SCG as a source of oil for biodiesel production; 5 others have proposed the application of SCG as a source of recoverable sugars that can be extracted and employed as food addictive or for bioethanol production 9–12 . Several works have reported the study of SCG constituents and their application in the food and nutraceutical industries 3,8,13–15 .…”

Section: Introductionmentioning

confidence: 99%

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An analytical method for the simultaneous quantification of 30 bioactive compounds in spent coffee ground by HPLC‐MS/MS

et al. 2020

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Spent coffee ground (SCG) is the remaining residue produced after extraction of coffee, and it is considered a source of unextracted bioactive compounds. For this, in the latest years, the attention has been focused to innovative reuses that can exploit the potentiality of SCG. Unfortunately, the content of bioactive compounds has not been thoroughly studied yet, and the major of publication has investigated the caffeine and chlorogenic acids levels, total polyphenol contents, and total flavonoid content. Hence, these approaches have determined only an estimation of flavonoids and polyphenols content and lack on single polyphenols investigation. Therefore, the objective of the current work was to provide a deep characterization of bioactive compounds in SCG. For this purpose, a new analytical method for the quantification of 30 molecules, including caffeine, chlorogenic acids, phenolic acids, flavonoids, and secoiridoids, has been developed using high-performance liquid chromatography tandem mass spectrometry. Moreover, several extraction procedures, that is, liquid-solid extraction assisted and not by ultrasounds, testing diverse solvents, were evaluated. Liquid-solid extraction assisted by sonication, with water/ethanol (30/70, v/v), resulted the best in terms of total bioactive compounds, and, once validated, the new analytical method was applied to five different espresso SCG samples. Data showed that caffeine (means: 1193.886 ± 57.307 mg kg −1) and chlorogenic acids (means of total CQAs: 1705.656 ± 88.694 mg kg −1) were the most abundant compounds in all SCG samples followed by phenolic acids such as caffeic, ferulic, gallic, p-coumaric, syringic, trans-cinnamic, and vanillic acid. Moreover, some flavonoids, that is, rutin, cyanidin 3-glucoside, and quercetin, occurred in almost all samples. This work provided a deepened characterization of bioactive compounds in SCG and can contribute to develop new strategies of reuses.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An analytical method for the simultaneous quantification of 30 bioactive compounds in spent coffee ground by HPLC‐MS/MS

et al. 2020

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“…Presently, some manufacturers of instant coffee use SCG as a fuel to generate steam from industrial boilers because of its high calorific value or otherwise, highly moist SCG is disposed to landfills (Silva et al, 1998;Chiyanzy et al, 2014). The disposal of SCG represents a potential hazard to the environment and requires waste management plans compatible with the regulations of each country (Campos-Vega et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

NPK-Liquid Fertilizer Based on Humic-Like Substances Extracted from Spent Coffee Grounds: Extraction, Preparation and Application to Maize

Kamh¹,

Hedia²

2018

Alexandria Science Exchange Journal

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Reuse of agricultural waste materials is a smart solution for reducing their environmental impacts and increase economic value. Spent coffee grounds (SCG) is worldwide generated in tremendous amounts. The objectives of this study were to optimize a method to extract humic-like substances (HLS) from SCG using KOH extractant, prepare a liquid organic-mineral fertilizer enriched with N and P in addition to K, and to evaluate this fertilizer on growing maize (Zea mays L.). HLS extracted from SCG increased with KOH concentration up to 3 N and with extraction ratio up to 1:10 at room temperature. Increasing the temperature to 50 and 80 °C and contact time up to 3 h, significantly enhanced HLS recovery. Therefore, the optimum conditions for maximum HLS extraction were; 2 N KOH, SCG-to-extractant ratio of 1:10, 3 h of contact time, and 80 °C. Adjusting the pH of the alkaline K-HLS supernatant to pH 6 was achieved using a mixture of HNO 3 and H 3 PO 4. The prepared NPK mineral-organic fertilizer (NPK-HLS) was dark brown containing 2.0/5.8/8.6 as N/P 2 O 5 /K 2 O and 5.1 %w/v HLS. The produced fertilizer was evaluated for its effect on maize plants grown in a calcareous soil low in available nutrient using a CRBD pot experiment. Two application rates of NPK-HLS (NPK-HLS1 and NPK-HLS2) based on P rates, 125 and 250 mg P pot-1 , with and without a basic fertilizer (BF) were applied. Both NPK-HLS1 and NPK-HLS2 rates significantly increased shoot dry matter, NPK uptake and availability in soil compared to the control, but did not significantly affect root dry matter. Increasing the application rate to NPK-HLS2 did not further increase dry matter or NPK uptake. No significant effect was found for BF for all measured variables. Results of this study showed that the extraction of HLS from SCG and its incorporation into a liquid fertilizer could be an alternative solution to the reuse of SCG.

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“…In another report, the researcher carried out steam explosion as a pretreatment at various temperatures from 150°C to 210°C for 15 minutes and processed enzymatic hydrolysis. Steam pretreatment recovered the highest soluble solid of 10.7% at 210°C for 15 minutes [28].…”

Section: Roasting Pretreatment For Scgmentioning

confidence: 98%

“…Chiyanzu et al [28] used the cocktail of mannanase (from Yarrowia lipolytica) and cellulase (Acremonium, Bioshigen Co.Ltd, Japan) enzymes at the 0.01/0.91% (w/w) concentration for the hydrolysis of steam-treated SCG, respectively. The applied enzyme cocktail for hydrolysis resulted in the increase in soluble solids containing polysaccharides by 22.6% (g per 100 g pretreated SCG), which is higher compared to our results, i.e., 17.43% (w/w) of SCG.…”

Section: Enzymatic Hydrolysis Of Crude and Pretreated Scgmentioning

confidence: 99%

Extraction of oligosaccharides and phenolic compounds by roasting pretreatment and enzymatic hydrolysis from spent coffee ground

Rizwan¹,

Hasmukh²

2020

J Appl Biol Biotech

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Spent coffee ground (SCG) is the waste generated during the preparation of instant coffee and is the source of industrially valuable organic compounds. In this article, SCG was pretreated by roasting at 150°C for 30 minutes and heated with water at 90°C for extracting carbohydrates and phenolic compounds, after which 1.0% (w/w) β-mannanase was applied for the hydrolysis of pretreated SCG. SCG is characterized in terms of its total sugar content by the anthrone-sulfuric assay and phenolic compounds by Folin−Ciocalteu's procedure. In this study, the total sugar increased by 14.79% (w/w) by the roasting process, and subsequently enzymatic hydrolysis increased the total sugar yield up to 17.43% (w/w) compared to the untreated SCG, i.e., 10.24% (w/w). The reducing sugar was estimated by the dinitrosalicylic acid method and the end product increased to 106.10 (mg Glucose/g) from the initial content 5.32 (mg Glucose/g raw SCG). The total phenolic compound increased to 291.86 (mg Gallic acid/g lyophilized material), which was a 6.39-fold increase compared to the native SCG (45.68 mg Gallic acid/g). These results point to the valuable compounds present in SCG, can be enhanced by combining the roasting pretreatment and enzymatic hydrolysis, and can be utilized in the food and biotech industries.

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Spent coffee ground mass solubilisation by steam explosion and enzymatic hydrolysis

Cited by 28 publications

References 30 publications

An analytical method for the simultaneous quantification of 30 bioactive compounds in spent coffee ground by HPLC‐MS/MS

An analytical method for the simultaneous quantification of 30 bioactive compounds in spent coffee ground by HPLC‐MS/MS

NPK-Liquid Fertilizer Based on Humic-Like Substances Extracted from Spent Coffee Grounds: Extraction, Preparation and Application to Maize

Extraction of oligosaccharides and phenolic compounds by roasting pretreatment and enzymatic hydrolysis from spent coffee ground

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