Agricultural residues seem to be the most promising energy resources for developing countries.rnHowever, the majority of them have low energy density. One of the favorable technologies forrnenhancing that property is charcoal Briquetting. A large amount of agricultural and solid wastesrnare left in the field after harvest. The primary objective of the study was to investigate therncomparative analysis of resource availability, physico-chemical properties and performance ofrnbiomass charcoal produce from the most promising wastes. Specific objective were to developrnand characterizing composite charcoal briquettes, investigate factors affecting densification ofrncomposite charcoal briquettes and compare resources availability, physic-chemical property andrnperformance of charcoal briquettes with wood charcoal.rnThe composite charcoal briquettes were produced using ASTM standard by a combination ofrnprocess factors. The three process factors were dwell time, clay binder ratio and pressure.rnDesign expert software, Box-Henken model were employed to investigate the effect of processrnfactors. The Density was found in the range of 783.00-1,187.00 kg/m^3. The coefficient ofrnmultiple determinations for prediction of the proposed density model was about 95.7%. Therneffect of the three variables against density was investigated. When every two combinations ofrnthe above variables were increased, density of briquettes was also found to increase. Optimumrnpoint of dwell time, pressure and clay binder concentration was found at 3.6 minute, 45 bars andrn18.27% respectively. The optimal point was validated.rnThe Production of 1300 tones/yr briquettes plant was evaluated. The total investment cost wasrnfound to be 1.9137milloion birr. The net present value and the internal rate of return of thernproject were 2,753,976 Birr and 19% respectively it implies the project was feasible.rnBase on the resource estimation using production to residue ratio, the quantity of availablernagricultural residue, cotton stalk, coffee husk, bamboo residue and jatropha press cake inrnEthiopia was approximately 4,655.887, 219.933, 109.757, 109.757,1,000 and 0.228Ktones/yrrnrespectively. When the fixed carbon of charcoal made from bamboo, cotton stalk, coffee residuernand composite with that of Acacia charcoal, 60.85, 58.4, 63.9, 68.25 and 69.74w/w % werernfound respectively. The above value all had relatively similar which makes it possible tornsubstitute wood charcoal. Regarding heating values of briquettes produced from bamboo, cottonrnComparative Analysis of Briquetting Most Viable Biomass Waste to Substitute Charcoal in EthiopiarnAAU, AAiT, M.Sc. Thesis by Anteneh B. xivrnstalk, coffee residue, composite and Acacia spp. charcoal were 29135.94KJ/Kg, 19209.03KJ/Kg,rn11710.48KJ/Kg , 23446.08KJ/Kg and 32573.304 KJ/Kg respectively. But all the heat values ofrnbriquettes were lower than that of charcoal. If the country substitutes wood charcoal by charcoalrnbriquettes, it will reduce 47.06 CH4 / year and 1530.383 Co2/year for every production of 1300rntons per year. The study showed that charcoal from bamboo; cotton stalk, coffee residue andrnagricultural residue could be used as substitutes for Acacia charcoal as they had comparablernpotential energy. But jatropha press cake currently had a low possibility to be use in our scenario.rnGenerally, this research concludes that the biomass charcoal had positive value of productionrnmethod, fixed carbon and performance, but one negative value was obtained from calorific value.rnWith Â¾ positive values, these biomass wastes can substitute wood charcoal in Ethiopia.