[Stoves] (no subject)

[rongretlarson at comcast.net]

Boston: 

I have lived in Boulder, but am now (normally - but won't be back until early April) in Golden. I would like then to meet and discuss this further. 

I think the issue for seed cake, which I have never worked with, is breaking or forming the cake into something that resembles the original seed - a pellet.or "stick" form. Can you describe the cake (thickness, density, malleability, etc)? There are many readers of this list knowledgeable on creating briquettes, pellets, etc. 

As Dr. Anderson has suggested, the issue for making charcoal in a cook stove is getting uniform primary air flow through the body of the fuel bed. Working with big slabs won't work for TLUDs, BLDDs, or TLODs. 

Ron 

----- Original Message ----- 
From: "Boston Nyer" <bostonnyer at gmail.com> 
To: "Discussion of biomass cooking stoves" <stoves at lists.bioenergylists.org> 
Sent: Friday, January 21, 2011 3:20:55 AM 
Subject: Re: [Stoves] (no subject) 

Crispin, 


I'm located in the US (Colorado). We're actually having difficulties importing seedcake from Guatemala, where our research is being conducted. To the best of my knowledge, the closest source of Jatropha seedcake would be Diligent Tanzania ( jan at diligent-tanzania.com or ruud.van.eck at diligent.nl ) , who are currently trying to briquette the material with an automatic press. 


It sounds like Dr. Anderson has found a way to burn the seeds, which is most excellent, but it would also be beneficial to burn the waste material after the oil extraction process. Maybe with a similar TLUD? As you know, Jatropha projects are springing up everywhere, so it could be very influential... 


Cheers, 
Boston 











On Thu, Jan 20, 2011 at 1:57 PM, Crispin Pemberton-Pigott < crispinpigott at gmail.com > wrote: 






Dear Boston 



Can you send me some jatropha seed cake? 



In fact, where are you? If it is more convenient, you can send it to SeTAR in Johannesburg and I will deal with it there. 



It is hard to believe there is no easy way to burn it. 



Thanks 

Crispin 







From: stoves-bounces at lists.bioenergylists.org [mailto: stoves-bounces at lists.bioenergylists.org ] On Behalf Of Boston Nyer 
Sent: 20 January 2011 15:39 

To: Discussion of biomass cooking stoves 
Subject: Re: [Stoves] (no subject) 






Hi Richard, 






I have a related question to this discussion, which I think is interesting. 





At CU, we have a Jatropha project that you fielded some questions about a few months ago. As I'm sure you've heard, Jatropha seedcake does not burn well, not even close. So, one of our questions now is: what can we do with this waste stream this is both useful and desirable? 





One approach we will test is to carbonize the material and for biochar briquettes (and a water filter media, etc.). However, I wholeheartedly agree with your sentiment on biochar briquettes. What is your opinion if the ag-waste doesn't burn well normally? It still seems a bit contrived, eh? 





I'm looking forward to hearing your perspective. 





Cheers, 


Boston 









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-- 
Boston Nyer 
Graduate Student 
Department of Civil, Environmental, and Architectural Engineering 
University of Colorado at Boulder 
(585) 503-3459 

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