National Institute of Advanced Industrial Science and Technology 
(AIST)
10 March, 2003

http://www.aist.go.jp/aist_e/latest_research/2003/20030319/20030319.html

This is a small website on research done on 6kW cogeneration 
system (provides heat and power).  The engine would run on biogas, 
with the electricity generated being used at the site (farm, 
sewage treatment plant, etc) and the heat generated would be used 
to maintain the digester temperature.

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Gabriel L. Espinosa

> BioEnergy and Sustainable Technology Society
> http://grove.ufl.edu/~bests/