The Effect of Coffee Dregs Addition on the Manufacture of Corn Cob Briquettes with Variation of Adhesive Type

Abstract

Energy demand is rising while the availability of fossil fuels is declining. In order to reduce the use of fossil fuels, it is necessary to utilize biomass energy as an alternative. Agricultural waste, such as corn cobs and husks, is used as raw materials for making briquettes. This study uses the carbonization method to convert raw materials into charcoal. Tapioca flour and sago flour are used as binders in the briquettes. Evaluation for calorific value, ash content, and moisture content are performed according to SNI 01-6235-2000. The research results show that briquettes made from a 50% ratio of corn cobs and coffee husks with sago flour as a binder have a moisture content of 4.93%, ash content of 2.22%, and calorific value of 5404.27 cal/gram.