So friends,
It's time again for another (much improved!) biogas workshop, offered by me, David House, author of the Complete Biogas Handbook, hosted by the University of the District of Columbia, in DC, on April 18-19th. You can learn more about the workshops by visiting
http://completebiogas.com/workshops.html, but meanwhile, let me give you an idea of what I've been doing, and what will be presented in the workshop.
When preparing for the workshop in Brooklyn, NY last year, where we were going to present low-cost,
tropical-climate biogas digesters, I began to think about biogas in the US, where digesters really require insulation and heating. I realized that it is possible to build such a digester, and when I got back to Oregon on my farm, I started experimenting with the ideas that I had developed. Materials testing proved that it would be possible to make digesters out of rigid polystyrene foam, so that, for the most part, the insulation is the container.
Thus the standard "poly-panel" digester, which requires about $350 in materials, is a 2.6 cu m slurry vol; (90 cu ft, 680 gal) digester that can utilize food waste, and which might provide as much as 7.5 cu m of biogas daily. (Just for comparison, a family of four would need a single cu m of biogas for daily cooking...)
So the workshop in DC will offer complete information about biogas, and will show you how to build as many of these digesters as you wish. I hope to see you there...
David William House
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