This paper investigated the feasibility of using the mixture of glycerin and biomass as an alternative fuel by measuring the energy used in the densification process and the energy gained from the briquette fuels. The correlation of the heating values between the calculated values and the actual values was also determined. Rice husk, sawdust, sugarcane bagasse, and sugarcane leaf were used as biomass. Different amounts of glycerin were mixed with the biomass during the densification process. The ratios of the energy used compared with the energy gained were approximately 1-3% for domestic-scale solar drying condition and 12-18% for industrial-scale machine drying condition. Heating values of the briquettes increased with the increasing amount of glycerin. Using the mixture of glycerin and biomass in the densification process was considered feasible to be further developed as an alternative fuel. (C) 2013 Elsevier Ltd. All rights reserved.