Spent Coffee Ground Briquettes

Abstract

Coffee is regarded as highly consumed beverage throughout the world and has established a key spot in the world economy as an important commodity for trading. In general, it is produced by brewing its roasted and ground beans, which release aromatic coffee as well as produce an equivalent amount of spent coffee grounds (SCG) as waste. In recent times, they are valorized into SCG briquettes owing to their high calorific value, which gained wide attention for supplying energy renewably, especially to the rising energy demand; and also have been identified as an effective measure to reduce their pollution. With this in mind, this chapter focuses on reviewing the availability and chemistry involved in these SCG wastes, pre-treatments, and preparations required for their briquetting, compacting techniques followed, and fuel characteristics of their briquettes, from various available works of literature. Eventually, all the reported data were in accordance with their permissible standards and suggested these SCG wastes as a highly renewable solid biofuel.