[Gasification] Any "help" appreciated --- Peter/Belize

[Art Krenzel]

Peter,

I like your focus on anaerobic digestion (AD) because it works in all sizes, 
a wide range of feedstocks and scales of production.

BUT, here is a more symbiotic idea.  Algae can produce between 5000 and 
20000 gallons of bio-oil per acre when optimized.  The algae are between 
30 - 50% lipid oils by weight and the rest of the body is starch.  They live 
on CO2, nutrients from dirty water and use sunlight for photosynthesis to 
produce the plant matter.  Details of the system can be located at 
http://www.oilgae.com/

Here is the great combination.  An AD produces on the order of 35 - 40% CO2 
and 60 - 65% methane.  The CO2 is easily removed from the gas and could be 
recycled back to the algae bioreactors as feedstock for the photosynthesis. 
The crude purified methane could be used as compressed gas for mobile fuel.

The oil is removed from the algae via several solvent or centrifugal systems 
already made.  The oil goes to bio-oil collection and the starch goes back 
to the AD system to produce more methane and CO2.

The only thing missing is sunlight and direct sunlight has 10 times the 
energy per unit area necessary for the photosynthesis.

This is not perpetual motion but it is an interesting symbiotic reaction. 
It works in small scale as well but suffers from economy of scale issues as 
do most energy processes

Good luck with that one!

Art Krenzel



----- Original Message ----- 
From: "Peter Singfield" <snkm at btl.net>
To: <gasification at listserv.repp.org>
Sent: Sunday, March 18, 2007 6:18 PM
Subject: Re: [Gasification] Any "help" appreciated --- Peter/Belize


> At 02:22 PM 3/18/2007 -0600, you wrote:
>>
>>Gosh, this does sound good to me.  I'm looking for a way to use
>>biomass for a small co-generation setup, and if I can use bugs to
>>gasify my grass, I'm good to go.   For a small, stationary engine a
>>steady flow of methane, enough to heat a standard house,  woud be
>>just fine.  How big of a  tank, etc, would it take?  Can this combine
>>with a bit of ethanol production for the vehicle?
>>
>>Best,
>>Bob Stuart
>
> According to AD the food fed fast bio methane digesters work 400 times or
> more faster than conventions sewage based digesters. So that equals a 4oo
> times reduction in size.
>
> One of the problems for folks to the north is keeping the digester hot
> enough -- 80 F or more i believe.
>
> Also -- this is covered on another list -- 
>
> BIOENERGY at LISTSERV.REPP.ORG
>
> Should be all kinds of people able to fill in the blank spaces there.
>
> The topic was originally started by AD Karve on the Stoves list a few 
> years
> back:
>
> stoves at listserv.repp.org
>
> I believe AD still contributes on that list now.
>
> Peter/Belize
>
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