Spent coffee grounds for biodiesel production and other applications

Caetano, Nídia S.; Silva, Vânia F. M.; Melo, Ana C.; Martins, António A.; Mata, Teresa M.

doi:10.1007/s10098-014-0773-0

Cited by 113 publications

(53 citation statements)

References 17 publications

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“…5, 5 and 10% (v/v This causes not only the loss of organic matter, but also the time and effort necessary to carry out the composting process. Spent coffee grounds (SCG) material includes a wide range of valuable organic compounds which contain, among others, tannic acid, cellulose, hemicellulose, lipids, organic acids and polyphenols and therefore it is used for the production of biochar, for composting as a sorbent and for the preparation of biodiesel [2][3][4]. SCG has been also considered as valuable source of polyphenols and galactomannans for application in medicine, cosmetics and food industry [5].…”

mentioning

confidence: 99%

Acute Toxicity of Experimental Fertilizers Made of Spent Coffee Grounds

Ciesielczuk

Rosik-Dulewska

Poluszyńska

et al. 2017

Waste Biomass Valor

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results indicate the lack of toxic effect of the tested fertilization doses on the germination of the test plants, with the exception of cress. There was, however a strong inhibition of seedling growth during 72 h in samples containing 10% of the tested fertilizers, especially when they showed significant salinity and high pH. The most sensitive species used for doses of fertilizer was cress, and the least sensitive was cucumber, for which there was a strong stimulation of root growth already at 5% share of tested fertilizer in the substrate. EI shows particular individual character of tested species using fertilizer based on SCG. The inhibition of wheat roots elongation was observed even in 2.5% fertilizers fare.Keywords Spent coffee grounds · SCG · Acute toxicity · Organic fertilizer · Sustainable agriculture IntroductionSeparate collection of biodegradable waste fractions, carried out at its source, enables not only to channel it to the process of composting or biogas production, but also to obtain high-quality fertilizer. This also applies to the waste solvent extractable materials generated after the preparation of beverages from coffee beans. These wastes are formed in large quantities due to the increasing consumption of this beverage [1]. The annual coffee consumption in Poland has been increasing and currently stands at 3 kg per capita, however this is a number several times lower than in the Scandinavian countries. In large part these wastes are directed to biodegradable fraction containers. In practice, however, the containers contain significant amounts of non-compostable waste and, even if a compost is produced, its quality will be low.Abstract Sustainable agriculture places new demands on agricultural practice and, in particular, plant protection treatments and fertilization. Therefore, an increase in demand for organic fertilizers of good quality is expected. In particular, the organic matter contained in the waste of the food industry or generated in households, in the absence of contamination, can be used for the production of "fertilizer", which could be used in organic crop production. The paper presents basic characteristics of tested mixtures and the results of testing for acute toxicity of the mixture made from spent coffee grounds (SCG) modified with ash arising from the low-temperature combustion of biomass or magnesium sulphate and blood meal. The plant tests were conducted on: mustard (Synapis alba L.), wheat (Triticum sp. L.), cucumber (Cucumis sativus L.) and garden cress (Lepidium sativum L.).Toxicity tests were carried out using a standard 72 h procedure using the Phytotoxkit microbiotest platelet involving fertilizer 2. 5, 5 and 10% (v/v This causes not only the loss of organic matter, but also the time and effort necessary to carry out the composting process. Spent coffee grounds (SCG) material includes a wide range of valuable organic compounds which contain, among others, tannic acid, cellulose, hemicellulose, lipids, organic acids and polyphenols and therefore it is used for th...

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mentioning

confidence: 99%

Acute Toxicity of Experimental Fertilizers Made of Spent Coffee Grounds

Ciesielczuk

Rosik-Dulewska

Poluszyńska

et al. 2017

Waste Biomass Valor

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“…The bound moisture content depends on the physical nature of the solid, drying temperature and time and it can be a limiting factor to the drying rate (9). Following haracteristics of SCG can be determined: content of moisture, total carbon, total nitrogen, protein, ash, cellulose, and insoluble (or Klason) and soluble lignin content (17).…”

Section: Oil Extraction From Spent Coffee Groundsmentioning

confidence: 99%

“…The solvent is then recovered in order to be used in the next batch of extraction (9). The oil quality is then assessed by determining the iodine number, the saponification, calorific values, acid value (AV), and content of water, kinematic viscosity, viscosity index, density and elemental composition (9,17). Moreover, the heating value of the SCG after extraction is measured.…”

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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“…Approximately 8 million tonnes of coffee grounds are produced each year [9], which represents a relatively pure waste stream that could be used for biofuel production. A number of studies have demonstrated the suitability of coffee biodiesel as a potential fuel feedstock [10][11][12][13][14]. Interestingly while these studies used coffee from various local areas, the fatty acid profile was relatively constant consisting of four major fatty acids; palmitic acid (C16:0, ~35%), stearic acid (C18:0, ~8%), oleic acid (C18:1, ~5%) and linoleic acid (C18:2, ~44%).…”

Section: Introductionmentioning

confidence: 99%

Production of Biodiesel from Vietnamese Waste Coffee Beans: Biofuel Yield, Saturation and Stability are All Elevated Compared with Conventional Coffee Biodiesel

Jenkins

Ellis

Lewis

et al. 2016

Waste Biomass Valor

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General rightsThis document is made available in accordance with publisher policies. Please cite only the published version using the reference above. Full terms of use are available: http://www.bristol.ac.uk/pure/about/ebr-terms Abbreviations: VCS1, Vietnamese coffee sample 1; VCS2, Vietnamese coffee sample 2; VCS3, Vietnamese coffee sample 3; CC, Colombian coffee; FAME, fatty acid methyl ester. AbstractIn this study the suitability of biodiesel produced from spent Vietnamese coffee was examined. Previous work has demonstrated the geographical origin of the coffee beans has little effect on the composition and physical properties of the biodiesel derived from the spent coffee grounds. Vietnamese coffee, however, is roasted in a range of fats and oils to change and enhance certain flavours and as such has a unique fatty acid profile. The oil yield and biodiesel properties of three Vietnamese coffees were assessed and compared to a coffee of more typical composition -Colombian -as well as to more traditional biodiesel feedstocks (rapeseed, sunflower and palm oils). The yield of oil from fresh Vietnamese coffee oil was generally higher (12.0-14.0%) than the Colombian coffee (9.3%), while the oil yield for the spent Vietnamese coffee (9.3-10.4%) was comparable to the spent Colombian coffee grounds (9.5%). The unsaponifiable matter was also affected and was only present in low levels in the Vietnamese coffee (1.9-4.9%) compared to Colombian coffee (30.4% fresh, 21.4% spent). Vietnamese coffee biodiesel was more saturated than the Colombian coffee. Accordingly the biodiesel was more viscous and had a higher pour point than Colombian coffee biodiesel, with properties more akin to palm biodiesel. Vietnamese coffee biodiesel would therefore be a suitable feedstock for local use in Vietnam due to the more suitable climate and compatibility with the palm feedstock that is currently widely used. Practical applicationsIn this study, we assessed the variability and suitability of Vietnamese waste coffee as a source of renewable liquid fuel. Vietnam produces 15% of all coffee consumed globally, equating to 1.7 million tonnes annually, and its use provides a relatively pure waste stream that would facilitate its valorisation. It should also be noted that in biodiesel production, the feedstock accounts for >70% of the overall cost. Using a waste resource that is effectively free drastically improves the economic viability of this alternative fuel technology. Graphical abstractSpent coffee grounds from Vietnam is demonstrated to be a suitable source of biodiesel

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Spent coffee grounds for biodiesel production and other applications

Cited by 113 publications

References 17 publications

Acute Toxicity of Experimental Fertilizers Made of Spent Coffee Grounds

Acute Toxicity of Experimental Fertilizers Made of Spent Coffee Grounds

Biodiesel Production from Spent Coffee Grounds

Production of Biodiesel from Vietnamese Waste Coffee Beans: Biofuel Yield, Saturation and Stability are All Elevated Compared with Conventional Coffee Biodiesel

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