[Stoves] rice husk pellets

[Richard Stanley]

 Paul,
Good insights which far more and far better educated and more focused  on the subject need to know about. Might I  suggest you contact wikipedia and submit that correction directly.
Thanks,
 Richard 


On Jun 13, 2013, at 9:41 PM, Paul Olivier wrote:

Richard,

I would question the statement that RHA contains about 85 to 90% amorphous silica.
A significant proportion of it should be in crystalline form.

Paul


On Fri, Jun 14, 2013 at 11:05 AM, Richard Stanley <rstanley at legacyfound.org> wrote:
Paul. 

Answer is that I don't know, to all of your  questions Paul: It was not our focus at the time. The rice hulls that were being anerobically decomposed were an eyesore and a real danger to the kids in the area who would play on them, sometimes falling into deep caverns created by the collapse of the structure on decomposition  often with tragic results. As a result the use of that resource became somewhat taboo for the briquette maker   The silica  content in the ash of combusted rice husks is however relatively well known published figure.   Here is this citation from wikipedia..
 

The densification  of rice hulls for the low pressure wet process we follow, making effective briquettes out of such requires that it is either made soft and "mashy" or so  fine as to serve as an infilling for a fibrous lattice work. 
 
Richard

On Jun 13, 2013, at 6:57 PM, Paul Olivier wrote:

Richard,

I assume that we are still taking about rice hulls. I supposed that this pile of rice hulls is being decomposed anaerobically. If this is the case, do you know how much methane is being released? You talk about a high silica content ending up in the ash. Have you checked the composition of this ash?


On Fri, Jun 14, 2013 at 8:47 AM, Legacy Mail <rstanley at legacyfound.org> wrote:
hi Trevor &Frank,
I am no expert on the stuff as it seems to vary considerably from what we have seen in practice.   Where it is left to  decompose in huge multi acre 50 ft tall mounds, (eg Mbale Uganda), you observe  a glutenous mass which can work very well even with other granular solids (sawdust, charcoal fines) right off the mound.  Take it off the fields dry (in such as Bamaco Mali ) and it has to indeed be blended with softened fibrous material. In either condition (whether gluten or fiber bound) the high silica generates lots of ash. 
Richard


Sent from my iPhone

On Jun 12, 2013, at 22:11, mtrevor at ntamar.net wrote:

> I suspect the high silicacontnt and loose nature will not compact well. However if macerated and retted, then mixed with other stuff--- then maybe. I suspect Richard Stanley could provide more info 
> 
> Michael N Trevor
> 
> Marshall Islands
> 
> 
> 

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Paul A. Olivier PhD
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Dalat
Vietnam

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