E3S Web of Conferences (Jan 2020)

Analysis of thermal properties of coffee grounds left over from coffee percolation

  • Głowacki Szymon,
  • Tulej Weronika,
  • Sojak Mariusz,
  • Bryś Andrzej,
  • Pietrzyk Karol

DOI
https://doi.org/10.1051/e3sconf/202015403004
Journal volume & issue
Vol. 154
p. 03004

Abstract

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Coffee is one of the most popular beverages worldwide. The goal of this work is an estimation of the qualities of waste coffee grounds as a material used in biofuel production. There were selected two most popular coffee beans mixtures: arabica and arabica with robusta, as well as chocolate-flavoured coffee and green coffee (unroasted coffee beans). All types of coffee had approximately the same ash value its average oscillating between 2,59-3,21%. Calorific value of the dried waste coffee grounds after coffee percolation places it among very good energy materials