[Digestion] Fw: Food-waste anaerobic digester at University of Colorado

[Katahdin Energy Works]

Not me but a colleague, has investigated this, and not knowing the strain of
Algae you are using; but he said this is a very labor intensive process best
done in a hot weather country, and compared it to raising Spirolina where
there is a lot of experience. 

Without a 95 degree lagoon, and lots of cheap labor, growing and harvesting
the algae and expressing the bio-oil is a very expensive process.

How much algea must be pressed to make 1 gallon of bio oil....a lot.

I like doing a double extraction, that changes the yield.

Everybody wants an easy answer, to producing bio-oil....not sure there are
any yet.

Frank J. Heller, MPA
KATAHDIN ENERGY WORKS
12 Belmont St.
Brunswick, ME 04011-3004
207.729.6090
http://mysite.verizon.net/fjheller/


-----Original Message-----
From: digestion-bounces at listserv.repp.org
[mailto:digestion-bounces at listserv.repp.org] On Behalf Of Art Krenzel
Sent: Tuesday, October 30, 2007 3:30 PM
To: Harmon Seaver; digestion at listserv.repp.org
Subject: [Digestion] Fw: Food-waste anaerobic digester atUniversityof
Colorado

To all:

I need to send a correction message regarding the production rate of algae 
to biodiesel.  I gave only the short version.

They ran their test program for 19 days and averaged a biomass production 
rate capable of producing about 13,100 gallons per day per acre over the 
total period.  During that time, for periods of time there were production 
peaks of up to 23,200 gallons per day per acre of biodiesel based on the 
biomass production rate.  It is my prediction that when optimized with an 
improved algae species, superior extraction system, additional process 
changes and using auxiliary fuel producing systems, this system can produce 
up to 56,000 gallons of biodiesel and other fuels per day per acre.

Art Krenzel


----- Original Message ----- 
From: "Art Krenzel" <phoenix98604 at msn.com>
To: "Harmon Seaver" <hseaver at gmail.com>; <digestion at listserv.repp.org>
Sent: Tuesday, October 30, 2007 8:00 AM
Subject: Re: [Digestion] Food-waste anaerobic digester atUniversityof 
Colorado


> Harmon,
>
> Excellent answer to the food waste problem!
>
> In the world that I am working on, all people moving vehicles are electric
> or biodiesel.  The electric power is generated from solar energy stored in
> the form of tree biomass and algae.  The CO2 produced by the electric
> generation is recovered to produce more algae.  Biodiesel is extracted 
> from
> the algae and the solid residues are fermented to alcohol or digested via
> anaerobic digestion to methane.  Biodiesel, methane and alcohol provide
> vehicle fuel which removes CO2 from the recycling system.  The system
> generates mobile fuel energy by collecting and recycling CO2 in a closed
> short cycle loop using algae and sunlight.
>
> Recently (in the last two months), an algae biodiesel system demonstrated 
> a
> production rate of 56,000 gallons of biodiesel per acre per year for a 
> trial
> run of 9 days.  I think this can be the real answer to the production of
> home grown fuels, not corn.
>
> Art
>
>
> ----- Original Message ----- 
> From: "Harmon Seaver" <hseaver at gmail.com>
> To: <digestion at listserv.repp.org>
> Sent: Saturday, October 27, 2007 11:24 AM
> Subject: Re: [Digestion] Food-waste anaerobic digester at Universityof
> Colorado
>
>
>>   Wouldn't the best use of food waste be to feed it to pigs -- then
>> harvest the meat and use the pig manure for fertilizer or else AD it?
>>
>>
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