The coffee extract residue was obtained from the division of chemical technology is coffee machines by discharging the filter paper into a flat tray of glass and was dried in an oven at 120 c for 24 h as thr water content of the residue exceeds more than 150%.
This precursor is then used for further processing in the steps to follow for the generetion of either ethanol or activated carbon. Bakers yeast from a local store ,analytical grade 99.5% ethanol, 85%