The manufacture of bio briquettes from carbonized corn cobs biomass has been carried out using a furnace, with variations in carbonization temperature 400 , 500 and 600 , and variations carbonization time of 30 minute, 60 minute and 90 minute. After the carbonization process, corn cobs charcoal was obtained, then crushed and sieved using a 100 mesh sieve. After the process, the charcoal is mixe…