Physicochemical Characterization of Wood Mixed with Coffee Waste Pellet

Abstract Recently, the demand for wood pellets as solid biofuel co-firing process in industry has increased. However, increase is not accompanied by availability of sawdust (SD) a raw material. Thus, seeking alternative biomass needed to substitute wood. One biomasses that can be considered material bio-pellet waste from coffee industry. Meanwhile, annually produces large amounts organic such spent grounds (SCG) and husks (CH). Both wastes have compounds contained so they utilized biofuel. In this research, We investigated quality changes before after addition different mass ratios (1:1, 1:3). A densification method with pressure 2 tons used pellet-making process. Physicochemical characterization density, durability, compressive strength, calorific value, proximate composition analysis using SCG CH are conducted. The result shows into pellet increased value 21.03 MJ.kg -1 21.71 . ratio 50: 50 SD: better than (20.64 ). mechanical test slightly decreases durability 99.34% 97.02%. appearance density ρ = 892.46 kg.m -3 1119.33