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原文轉自 http://pubs.acs.org/doi/abs/10.1021/jf802487s
Spent Coffee Grounds as a Versatile Source of Green Energy
Narasimharao Kondamudi, Susanta K. Mohapatra and Mano Misra
摘要
The production of energy from renewable and waste materials is an
attractive alternative to the conventional agricultural feed stocks such
as corn and soybean. This paper describes an approach to extract oil from
spent coffee grounds and to further transesterify the processed oil to
convert it into biodiesel. This process yields 10-15% oil depending on the
coffee species (Arabica or Robusta). The biodiesel derived from the coffee
grounds (100% conversion of oil to biodiesel) was found to be stable for
more than 1 month under ambient conditions. It is projected that 340 million
gallons of biodiesel can be produced from the waste coffee grounds around
the world. The coffee grounds after oil extraction are ideal materials for
garden fertilizer, feedstock for ethanol, and as fuel pellets.
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