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- W2741397988 abstract "Abstract The aim of this work is to validate a new sustainable economic circle where coffee roasting companies recycle spent coffee grounds as a source of thermal energy to produce roasted coffee. The green coffee beans need a significant quantity of heat in the roasting process and this energy could be obtained from the spent coffee grounds discarded by espresso bars. According to the concept of circular economy, a coffee company collects the coffee disposed by the bars where it was brewed, and uses it in a heat generator for the roasting process. This paper presents the feasibility of SCG-wood sawdust pelletization and combustion in a 29 kWth air furnace. Results of the tests report a thermal efficiency of 41.2% instead of 37.7% obtained with only wood pellet. In addition, the case study of a small Italian roasting company is discussed. The company produces about 5 tons of roasted coffee per day and it uses 400 Nm3/day of natural gas as heat source. The company totally satisfies its energy demand through wood-coffee pellet combustion instead of natural gas. According to the business plan, the pay-back period of the investment is four years after which company CO2 emissions significantly decrease." @default.
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- W2741397988 date "2017-11-01" @default.
- W2741397988 modified "2023-09-26" @default.
- W2741397988 title "Spent coffee grounds as heat source for coffee roasting plants: Experimental validation and case study" @default.
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- W2741397988 doi "https://doi.org/10.1016/j.applthermaleng.2017.07.202" @default.
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