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Dear Michael, I had replied to a couple of other
requests off line, but it looks as if the New Zealand Farmer biogas system is
interesting to many more, so I am replying to you on the
network. Because of the low prices for petroleum fuels over the last
15 years, there are not too many plants still working, but those that are will
be watching the present OPEC price hikes with great interest. I
might also say that using the UASB technique, you don't need to use up
half of your gas to heat the system to mesophyllic temperatures. Biogas can
be made at temperatures as low as 10-15oC If you look at the
publications page on my website, you will see a report there on making
biogas from coffee wastes which gives most of the
details.
Sincerely,
Sent: Monday, April 08, 2002 8:17
PM
Subject: Re: DIG-L: energy
conversion
Dear Ken,
I would be more interested in your system of gas
stripping, especially to take out the CO2 under low pressure. How is it done
and is it still done in New Zealand as in Germany we are looking always at
very complicated devices when it comes to CO2 stripping ? Could you send some
more information, bacause farmers here are interested in low tech
approaches.
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