Coffee beans can be used for energy production

A study performed a basic test to evaluate the energy value of food waste and ground coffee residue, and measured the calorific value of mixtures of food waste and ground coffee.

According to the results of this study, food waste, ground coffee, and their mixtures are technically viable as energy resources. The proximate analysis results for food waste and ground coffee mixture showed 51.6 percent moisture, 46.2 percent combustibles, and 2.2 percent ash content. (origo)