Effect of Density and Hardness on Burning Rate of Water Hyacinth and Coconut Shell Briquettes

The purpose of this study was to determine the characteristics of briquettes produced, including water content, volatile substance content, combustion rate, density, hardness, and to find the appropriate comparison from a mixture of water hyacinth and coconut shell with variations in tapioca adhesive levels. The mass ratio between water hyacinth and coconut shell in this study is 1 0: 0 1: 0.25 0.75; 0.5: 0.5; 0.75: 0.25 with a variation of tapioca adhesive content of 4% of the weight of the raw material. From the results of this study it was found that the ideal composition of briquettes was obtained in a mixture of water hyacinth and coconut shell at a ratio of 0.25: 0.75 with 4% tapioca adhesive content with 4.95% moisture content. volatile substance content 10.363%, density value 0.613 gr / cm, combustion rate 0.826 g / minute and hardness 0.716 HL.