[Digestion] US Biogas Office

[Warren Weisman]

There's no reason in the world to spend a lot of money
on a digester (unless you're selling big digester
parts) and no reason to waste money transporting
feedstock to a centralized digester. It should be
clear by now that high volume thermophillic digesters
are too unstable compared to well-maintained, common
temperature digesters. Same principles are true for my
little residential digesters as are true with the big
ones, only I can get better stirring and far better
influent control and mixing. 

There's over 10 Million of the 10 cu.m. pit-type
digesters in use in China, so the design is pretty
successful. Difference being in the US we'd use a
sealed auger to remove effluent to avoid folks having
to handle it. 

The 10 cu.m. pit will produce 1 cu.m. of biogas per
day---enough for a family of 5-6 to cook 3 square
meals a day or generate 1 kW of electricity. 

I figure there's no sense in re-inventing the wheel. I
just missed an EPA grant for a residential digester I
developed for use in high-rise buildings that utilizes
a number of small, 1 cu.m. canisters connected
together with a gas manifold. I'm going to be building
them in the backyard until another funding opportunity
comes around. Warren

--- Alejandro Bustamante <labrava4 at yahoo.com> wrote:

> A Chinese type biogas installation in the States?
> I think only for Hippie Farms. For what I have read
> there are some farms that have invested sizable
> amounts of money, close to half a million dollars,
> and
> some of them decide to go out of bu sines and sell
> the
> land for a development. Anything that will make the
> farmer independent from the Electric Utilities and
> the
> Oil Companies is not going to be encouraged by the
> current Government.
> 
> Alejandro Bustamante
> 
> 
>      
>
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