Energy Utilization of Spent Coffee Grounds in the Form of Pellets

Nosek, Radovan; Tun, Maw Maw; Juchelková, Dagmar

doi:10.3390/en13051235

Cited by 37 publications

(23 citation statements)

References 20 publications

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“…Many studies have investigated the pellet of coffee grounds and some have found slightly lower heating values (18.8 MJ/kg 50 , 19.6 MJ/kg 51 ) than that reported in this study while other report much higher heating values (23.4 MJ/kg 7 , 25.7 MJ/kg 52 ). Other studies have verified the pelletizing process through mixtures with other types of waste 53 or materials 54 , 55 , or with different percentages of moisture. Still others have modified other parameters such as die height, Lisowski et al (2019) 56 and have verified how the moisture of the matrix can be determined in the pelletizing process.…”

Section: Discussionmentioning

confidence: 99%

Spent coffee ground characterization, pelletization test and emissions assessment in the combustion process

Colantoni

Paris²,

Bianchini

et al. 2021

Sci Rep

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Industrial development and increased energy requirements have led to high consumption of fossil fuels. Thus, environmental pollution has become a profound problem. Every year, a large amount of agro-industrial, municipal and forest residues are treated as waste, but they can be recovered and used to produce thermal and electrical energy through biological or thermochemical conversion processes. Among the main types of agro-industrial waste, soluble coffee residues represent a significant quantity all over the world. Silver skin and spent coffee grounds (SCG) are the main residues of the coffee industry. The many organic compounds contained in coffee residues suggest that their recovery and use could be very beneficial. Indeed, thanks to their composition, they can be used in the production of biodiesel, as a source of sugar, as a precursor for the creation of active carbon or as a sorbent for the removal of metals. After a careful evaluation of the possible uses of coffee grounds, the aim of this research was to show a broad characterization of coffee waste for energy purposes through physical and chemical analyses that highlight the most significant quality indexes, the interactions between them and the quantification of their importance. Results identify important tools for the qualification and quantification of the effects of coffee waste properties on energy production processes. They show that (SCG) are an excellent raw material as biomass, with excellent values in terms of calorific value and low ash content, allowing the production of 98% coffee pellets that are highly suitable for use in thermal conversion systems. Combustion tests were also carried out in an 80kWth boiler and the resulting emissions without any type of abatement filter were characterized.

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Section: Discussionmentioning

confidence: 99%

Spent coffee ground characterization, pelletization test and emissions assessment in the combustion process

Colantoni

Paris²,

Bianchini

et al. 2021

Sci Rep

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“…Previous studies have been conducted on the combustion performance and gaseous and particulate emission of SCG mixed pellets [5], evaluation of quality standards for pellets mixed with coffee and various biomasses [25], and determination of pellet characteristics according to pellet molding conditions [8]. Nosek et al, reported that the calorific value of pellets mixed with coffee grounds and pine sawdust increased with increasing in the proportion of coffee grounds and that the pellets with high proportions of coffee grounds produced increased the exhaust emissions [26]. However, there is a lack of evaluation based on the fuel quality standards to commercialize coffee and pine sawdust mixed pellets as fuel.…”

Section: Introductionmentioning

confidence: 99%

Solid Fuel Characteristics of Pellets Comprising Spent Coffee Grounds and Wood Powder

Woo

Kim

2021

Energies

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To help mitigate the effects of global warming and fossil fuel depletion caused by human use of fossil fuels, solid fuel pellets were developed from a mixture of spent coffee grounds (SCG) and pine sawdust (PS). The feasibility of SCG-PS pellets as biofuel was also verified by evaluating its fuel quality. An increase in the proportion of SCG in the pellet led to an increase in its calorific value, owing to the high C, H, and oil contents, and increases in the ash and S contents, owing to the high S content in SCG. Analysis of the feedstock particle size distribution revealed that SCG particles are smaller than PS particles; thus, the durability of the pellet decreases as the proportion of SCG increases. Accordingly, the samples with higher SCG proportions (70 and 90 wt.%) did not meet the moisture content standards for biomass solid refuse fuel (bio-SRF) set by the Korea Ministry of Environment, whereas the samples with lower SCG proportions did. In particular, CP10 (10 wt.% SCG + 90 wt.% PS) satisfied the quality standards of Grade 1 wood pellets, demonstrating the feasibility of using SCG as a raw material for biofuel pellet production.

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“…The reuse of these wastes is allowed to be valued, therefore, the coffee farms can take advantage of these resources [6]. The solid waste from the coffee agro-industry can be used for other purposes, for instance source of compost, substrate, biodiesel products and its by-products [7][8][9][10]. All these wastes obtained during the agro-industry process activity cause an adverse environmental impact if they are thrown into natural sources of water.…”

Section: Introductionmentioning

confidence: 99%

Sustainability and Economic Feasibility through the Production of Oyster Mushroom (Pleurotus Ostreatus (Jacq.) P. Kumm.) Derived from the Waste of Coffee-Industry: A Case Study in the Western Area of San Salvador, El Salvador

Lopez¹,

Thepanondh²,

Sachdev³

et al. 2021

Pol. J. Environ. Stud.

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This research aims to assess the sustainability and feasibility of the production of Pleurotus ostreatus using ground coffee seed and pulp waste as substrate, and then demonstrating its economic profitability. Different raw materials were characterized as substratum and technical aspect production in the greenhouse for P. ostreatus were analyzed with the economic analysis for financing the project. With this technique, we found an option of sustainable model production, which concedes added value to the agricultural wastes from coffee processing once is used as a source of substrates for the production of Pleurotus ostreatus. The results obtained from the production of mushrooms through the waste from ground coffee and pulp are feasible and profitable in San Salvador. The use of coffee waste in the production of mushrooms will reduce the waste or biomass resulting from the coffee industry, therefore, it is a sustainable alternative in environmental terms. Moreover, economic analyses from PI's were 3.047052287, given that it was >1, consequently, the project was accepted, while the IRR was

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Energy Utilization of Spent Coffee Grounds in the Form of Pellets

Cited by 37 publications

References 20 publications

Spent coffee ground characterization, pelletization test and emissions assessment in the combustion process

Spent coffee ground characterization, pelletization test and emissions assessment in the combustion process

Solid Fuel Characteristics of Pellets Comprising Spent Coffee Grounds and Wood Powder

Sustainability and Economic Feasibility through the Production of Oyster Mushroom (Pleurotus Ostreatus (Jacq.) P. Kumm.) Derived from the Waste of Coffee-Industry: A Case Study in the Western Area of San Salvador, El Salvador

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