Spent Coffee Grounds as a Versatile Source of Green Energy
Narasimharao Kondamudi, Susanta K. Mohapatra, Mano Misra
Journal of Agricultural and Food Chemistry 2008 56 (24), 11757-11760
Paraphrasing, he said: "Wouldn't it be cool if we could get used coffee grounds from a local coffee shop, extract the residual oil, turn it into biodiesel, and document the process via pictures, video and blog(s), from start to finish?"
Well, why not?
Ken Costello is a friend of Desert Biofuels and was intrigued by the idea. He agreed to do some small test batches to determine how much oil was present in the coffee grounds. MonaLou Callery, who operates Cup o' Karma in Mesa, agreed to collect coffee grounds for the project.
So yesterday I went down to Mesa and picked up two 5 gallon pails of coffee grounds and delivered them to Ken this morning. He'll be spending at least part of this afternoon trying to find out the percentage of residual oil in the grounds, and then a reasonably efficient way to scale up the extraction process so that we can get about a gallon of oil to turn in to biodiesel.
We'll post a full report, with pictures and maybe video, sometime soon.