New research from the scientists Narasimharao Kondamudi and his colleagues has come up with new idea of producing bio fuels from coffee grounds. The bio fuels made from cooking oil produces exhaust that smells like fast food joint but the bio fuels from coffee grounds would not produce the offensive smell, moreover the exhaust have the aroma of coffee. After the bio fuel is extracted the remaining can be used as compost for plants and crops. The research started with a sweet experience of Dr.Misra, one day he left a cup of coffee unfinished and the following day he saw the coffee was covered by film of oil. Then he called his colleagues to investigate in the topic. They found the bio fuel from coffee and it is of best quality when compared with the commercial bio diesel available in market. The bio diesel made from soya and corn demands the agricultural field to be turned for growing crops to produce bio diesel. The bio diesel is extracted by the process of transesterification; the process is similar to extracting diesel from vegetable oil. First the coffee grounds are made to react with alcohol in presence of a catalyst. Then it is dried overnight and some chemical solvents are added to dissolve oil. The grounds are filtered out and the solvent is separated. Then the solvent is treated to remove the fatty acids. After that the bio diesel is heated to about 100 degree Celsius and treated with methanol. When cooled at room temperature the bio diesel floats above the layer of glycerin. United States Department of Agriculture report states that 7m tones of coffee are consumed every year which would account for 340m gallons of bio diesel.
