[Terrapreta] Farm Produced Biochar

[Tom Miles]

Jeff,

It looks like you're ready with your chipper and bale wagon to go into
production.

How many bales do you get in a basket? If the bales are 80-90 lb they're
probably about 8-10 lb/ft3. Charcoal is about 15 lb/ft3. For every five
bales (450 lb, 40 ft3) you get the equivalent of one bale (90 lb, 6 ft3) in
charcoal.

A 40 tpd charcoal process requires about 2.5 truckloads (15 t/truck) of
square bales or 80 round bales, 100 poplar stems at 800 lb each, or two
truckloads of chips at 2000 ft3/truck every day.

HNEI's Demonstration Flash Carbonization reactor will process about 10
tons/24 hours. I don't know what the batch size is. At 3 ft diameter by 9
feet tall it would have a volume of 63 ft3. At 60ft3 that's a batch of 900
lb dry wood (15 lb/ft3) or 480 lb straw (8 lb/ft3). A 1 hour cycle
(load-process-unload) at 40% yield would make 8,000 lbs charcoal from 20,000
lbs wood per day and about 4,00 lb charcoal from 10,000 lb straw.


Tom
     
 

> -----Original Message-----
> From: terrapreta-bounces at bioenergylists.org [mailto:terrapreta-
> bounces at bioenergylists.org] On Behalf Of Jeff Davis
> Sent: Friday, August 17, 2007 2:18 PM
> To: 'terra preta'
> Subject: Re: [Terrapreta] Farm Produced Biochar
> 
> Dear All,
> 
> In regards to portable field charcoal production:
> 
> Yes, you could do this BUT in the end you will have a stationary plant.
> That also goes for a SMALL operation.
> 
> For example: You can see my harvesting operation at
> http://www.puffergas.com/reviews/balebasket.html
> 
> Your all ready loaded and ready to truck to the home base where ALL of
> your tools are and you can charcoalize when you have the time to do so.
> 
> 
> Make hay while the sun shines (not charcoal),
> 
> 
> Jeff
> 
> 
> --
> Jeff Davis
> 
> Some where 20 miles south of Lake Erie, USA
> 
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