[Stoves] Forest residues use, as applied to the wet process /low pressure, hand briquettemaking, briquetter....

[Otto Formo]

Dear Timothy,
you dont say anything about what type of stoves or energy units you are using...?.
In a TLUD Gasifier Unit I dont see it could make any difference, if you use briquettes out of sawdust (pine), grass, woodchips or sticks, or any type of biomass.
I guess your stove technology is the "culpit" to your problems and of course the low preassure metode for makeing the brquettes.
The newspaper also content ink from the printing process which might cause the high PM.
Why dont you try any other type of suitable biomass as binder, like casava or banana?
Good luck!
Otto


> From: Timothy Roy Longwell [tlongwell at zamorano.edu]
> Sent: 2010-12-04 13:13:53 MET
> To: Discussion of biomass cooking stoves [stoves at lists.bioenergylists.org]
> Subject: Re: [Stoves] Forest residues use, as applied to the wet process /low pressure, hand briquettemaking, briquetter....
> 
> Greetings,
> 
> Has anyone else done emissions evaluations of briquettes? We have found that briquettes made of a) sawdust, b) grass and c) pine needles (with newspaper as the binding agent) have higher carbon monoxide and dioxide and PM when compared with pine fire wood.
> 
> Regards,
> 
> Ing. Timothy Roy Longwell
> Profesor Asociado de la Carrera de Desarrollo Socioeconómico y Ambiente,
> Jefe de la Empresa Universitaria Forestales
> E. A. P. El Zamorano
> Honduras, América Central
> 
> From: stoves-bounces at lists.bioenergylists.org [mailto:stoves-bounces at lists.bioenergylists.org] On Behalf Of Anand Karve
> Sent: Saturday, December 04, 2010 5:09 AM
> To: Discussion of biomass cooking stoves
> Subject: Re: [Stoves] Forest residues use, as applied to the wet process /low pressure, hand briquettemaking, briquetter....
> 
> Dear Richard,
> agricultural residues are difficult to collect from the field if the crop is harvested using a combine harvester. But in most farms in India, the harvesting is done manually and the threshing is done on a threshing floor. In such a case, a huge quantity of residue accumulates near the threshing floor. The officials of the Department of Agriculture recommend that the residues be either composted or spread back on the field to rot there. But the farmers burn the residues instead. Since the residues are present at one place in relatively large quantities, one can think of briquetting them either as such or after charring them.
> Yours
> A.D.Karve
> On Fri, Dec 3, 2010 at 10:21 PM, Richard Stanley <rstanley at legacyfound.org<mailto:rstanley at legacyfound.org>> wrote:
> The resource picture as applied to wet process briquetting, would tend to see the actual forest resource data a bot more  selectively, because they will just be picking off the leaf and twig faction...
> 
> Even at that, few producers, working in their local  capacity as self contained and sustained, unsubsidized  entrepreneurships, will go around raking up leaves off a forest floor because it's simply too much work !  They and we here in Obamaland-- for our own household, will generally just look for this stuff where its windblown in depressions or other natural areas of wind deposition (corners of buildings, curbs, trenches,  gullies etc)...These places are,  nicely enough, usually locations where the leaf extraction is both aesthetically friendly and environmentally neutral, because their removal cleans up the environment and has little to zero  impact on soil tilth..
> 
> Even at that however, ag residues are only part of the resource.
> Why ? Simple economy of effort. Most of us will prefer to seek out readily available commercial processing wastes ( sawdust/ rice husks / charcoal crumbs/ waste paper and selected cartonboard residues) as these do not require fermentation and / or entensive retting.
> 
> The ag residue blending part requires greater skills in handling too: Its for Briquetting 202
> 
> Pressing on,
> 
> Richard Stanley
> back home in Obamaland
> 
> 
> On Dec 3, 2010, at 3:38 AM, Crispin Pemberton-Pigott wrote:
> 
> 
> Dear Ron and Richard
> 
> I have seen it writ here and there that 50% of the biomass of a commercially managed forest remains on the forest floor after harvesting (branches, leaves and stumps). It is often raked into rows and burned to prevent fires later.
> 
> Regards
> Crispin
> 
> 
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