Dr. Reed,
On 7/20/2011 12:27 PM, Thomas Reed wrote:
Dear Phil and all Phil seems concerned about getting the "right" bacteria. My impression is "if you vuildmit, they will come".
Anaerobic life has proven ubiquitous, indeed, so wherever conditions are right-- a biogas digester, a stagnant pond, one's own gut-- anaerobes indeed "show up". One may want to gather inoculates from various sources-- cow manure, ground up termites-- and put those things in the digester, but it is not certain that will assist in producing more biogas. Regardless, given that the digester will be a very complex ecosystem exposed to repeated inoculations with incoming material, there is little point in trying to arrange things so that the "livestock" are restricted to a particular set of chosen species. It might be done, but it would require sterilizing incoming material, etc., and it's not clear all that can take place and still have the system be net positive for energy, or indeed anything like as net positive as a "fill and forget" system.
d. -- David William House "The Complete Biogas Handbook" |www.completebiogas.com| /Vahid Biogas/, an alternative energy consultancy |www.vahidbiogas.com | "Make no search for water. But find thirst, And water from the very ground will burst." (Rumi, a Persian mystic poet, quoted in /Delight of Hearts/, p. 77) http://bahai.us/
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