Supercritical fluid extraction of lipids from spent coffee grounds

Couto, Ricardo; Fernandes, João; Silva, M.D.R. Gomes da; Simões, Pedro

doi:10.1016/j.supflu.2009.09.009

Cited by 171 publications

(113 citation statements)

References 23 publications

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“…Table 2 shows that SCGs from the instant coffee industry contain significantly more oil than retail SCGs. This is in agreement with the range of oil yields shown in Table 1 which were obtained from retail SCGs and contain amounts of lipids in similar ranges to those of the RCG samples of the present study [7,8,10,12,13,16,17]. The oil contents of FRCG and RCG2 samples are quite similar suggesting that the coffee brewing procedure used, an Espresso machine, does not remove lipids.…”

Section: Feedstock Characterizationsupporting

confidence: 90%

“…In particular, the roasting process only increases the trans FA levels (C18:2ct and C18:2tc) [23]. However, experiments performed by Couto et al, Ahangari and Sargolzaei and Kondamudi et al revealed slightly different SCG oil compositions and suggest that differences can occur [7,12,13].…”

Section: Fatty Acid Profilementioning

confidence: 94%

“…The lipid content of SCGs on a dry weight basis has been found to range between 7 and 27.8% w/w according to previous studies [6][7][8][10][11][12][13][14][15][16][17] and is significant relative to other major biodiesel feedstocks such as rapeseed oil (37-50%), soybean oil (20%) and palm oil (20%) [18]. Coffee oil consists primarily of triglycerides, diglycerides, monoglycerides and FFAs that combined account for 85-90% of the total lipid content and are principally composed of linoleic, palmitic, oleic and stearic acids in decreasing order of magnitude and in proportions not unlike those found in other common edible vegetable oils [6,11,13,16,19].…”

Section: Introductionmentioning

confidence: 94%

See 2 more Smart Citations

Effect of Solvent Extraction Parameters on the Recovery of Oil From Spent Coffee Grounds for Biofuel Production

Efthymiopoulos

Hellier

Ladommatos

et al. 2017

Waste Biomass Valor

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Spent coffee grounds (SCG) are a potentially valuable source of lipids for sustainable production of biofuels. However, there are several feedstock properties and solvent extraction parameters that can impact on the oil yield and quality, potentially reducing the possible environmental benefits of deriving oils from this waste stream. This study presents results of laboratory and pilot plant scale experimental investigations into lipid recovery from spent coffee, determining the effects of solvent extraction variables including duration, SCG-to-solvent ratio and SCG residual moisture. SCG samples from both the industrial production of instant coffee and retail coffee shops were characterized in terms of moisture content, particle size distribution and oil content to identify the impact of these variables on the efficiency of lipid recovery by solvent extraction. The dry weight oil content of the instant SCG samples ranged from 24.2 to 30.4% w/w, while the retail SCG samples contained considerably lower amounts of lipids with their oil content ranging between 13.4 and 14.8% w/w. The highest oil yields were found at an extraction duration of 8 h, while a moisture content of ~2% w/w led to increased yields relative to completely dry samples. A pattern of increasing acidity with decreasing extraction duration was observed, suggesting preferential extraction of free fatty acids (FFA), with the fatty acid (FA) profile of the oil found to be similar to lipids commonly utilized for biofuel production.

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Section: Feedstock Characterizationsupporting

confidence: 90%

Section: Fatty Acid Profilementioning

confidence: 94%

Section: Introductionmentioning

confidence: 94%

See 1 more Smart Citation

Effect of Solvent Extraction Parameters on the Recovery of Oil From Spent Coffee Grounds for Biofuel Production

Efthymiopoulos

Hellier

Ladommatos

et al. 2017

Waste Biomass Valor

View full text Add to dashboard Cite

show abstract

“…Results of supercritical fluid extraction of coffee has been reported in the literature, either in green (23,24), roasted (23) or spent (18,25,26,27) forms. Another type is microwave extraction or microwave-assisted extraction (18,22).…”

Section: Oil Extraction From Spent Coffee Groundsmentioning

confidence: 99%

Biodiesel Production from Spent Coffee Grounds

Blinová

Bartošová

Sirotiak

2017

Research Papers Faculty of Materials Science and Technology Slovak University of Technology

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The residue after brewing the spent coffee grounds is an oil-containing waste material having a potential of being used as biodiesel feedstock. Biodiesel production from the waste coffee grounds oil involves collection and transportation of coffee residue, drying, oil extraction, and finally production of biodiesel. Different methods of oil extraction with organic solvents under different conditions show significant differences in the extraction yields. In the manufacturing of biodiesel from coffee oil, the level of reaction completion strongly depends on the quality of the feedstock oil. This paper presents an overview of oil extraction and a method of biodiesel production from spent coffee grounds.

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“…O teor de lipídeos está entre 9 e 18 % em base seca (COUTO et al, 2009;CRUZ et al, 2012;OBRUCA et al, 2014) e o teor de proteínas entre 10 a 17 % em base seca (ACEVEDO et al, 2013;BALLESTEROS et al, 2014;CRUZ et al, 2012). Alguns trabalhos obtiveram teores de óleo acima de 20 % em base seca utilizando éter de petróleo como solvente (ACEVEDO et al, 2013;LAGO et al, 2001).…”

Section: Lista De Figurasunclassified

Minimização de resíduos do processamento do café solúvel através do reaproveitamento da borra para extração de óleo utilizando solvente renovável

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Supercritical fluid extraction of lipids from spent coffee grounds

Cited by 171 publications

References 23 publications

Effect of Solvent Extraction Parameters on the Recovery of Oil From Spent Coffee Grounds for Biofuel Production

Effect of Solvent Extraction Parameters on the Recovery of Oil From Spent Coffee Grounds for Biofuel Production

Biodiesel Production from Spent Coffee Grounds

Minimização de resíduos do processamento do café solúvel através do reaproveitamento da borra para extração de óleo utilizando solvente renovável

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