Crispin, Cecil et al., Sustainaible offtake is interesting issue with the non wood biomass briquetteer. A general framework of such an assessment we use is based on how much leaf matter is available on a sustainable basis. Ie., grodss fall off in kgs per tree per year, less leaf cover needed for maintenance of soil tilth beneath the tree's canopy( kg/yr.)--over the leaf-producing life of the tree. That figure compared to the one time or even coppiced life of the tree used as fuelwood.
Of course you would then need to subtract the published figures for the reported lower energy content of the leaves compared to their parent wood species, but it turns out that that figure also too has to be adjusted to arrive at a USEFUL energy content of the leaves versus parent wood fuel), the difference being found in the form in which the leaf is combusted, even assuming use of leaf biomass and parent wood species in the same stove. We see and others have documented leaf blend outperforming their fuel wood parent species frequently when well formed into the hollow core form of briquette, the most recent test of which was performed by the wooden bridges trading company quite independent of any outside guidance or insight, here in Grenada Nicaragua, as we only recently discovered. Richard 'el pelon' Stanley suffering in la Laguna de Apoyo, Nicaragua On Feb 14, 2014, at 8:12 PM, Crispin Pemberton-Pigott wrote: Dear Art and All I support your efforts in this regards and it would be good to have a webinar on the subject. I remind all as does Richard S that one of the obvious uses of char and char fines (which I consider to be separate resources) is as fuel in another stove or other combustor. The many other uses are too long to list here. Cecil Cook is one of those who has attempted to quantify the total resource available at the various stages of the value chain from the standing tree to the cooked food over an urban fire. He has studied this in Mozambique with an emphasis on Maputo and in Lusaka, Zambia. The nature of the opportunity is of course geographically distributed. The char remaining in the hole in the ground on the farm may have a local value that makes it not worth transporting out of the region. The char dust underfoot in the city's markets is probably best used as fuel to reduce importation. The additional mass of material available at each transport or vending node is a substantial fraction of the total resource. The national and international marketing opportunities for these fractions would be a good subject for discussion. Regards Crispin in Nairobi traffic From: Art Donnelly Sent: Saturday, February 15, 2014 02:01 To: Discussion of biomass cooking stoves Reply To: Discussion of biomass cooking stoves Subject: Re: [Stoves] From Cookstoves Webinar "Charcoal Briquette Enterprise Development" Dear Elisa and all, I want to thank Ron, Paul and Otto for speaking up on the need to consider the multiple ways that stove users and charcoal makers can derive benefits and income from char production. As a person involved in one of the few biochar stove projects (Estufa Finca) buying charcoal from stove users in our program and reselling it as biochar, filtration media, as ingredients for cosmetics, etc.. I would like to join with the colleagues who have already spoken up and help you plan a webinar on the topic of these alternative uses for char. Thank you to Winrock for extending this offer. Please feel free to contact me directly. Art Donnelly _______________________________________________ Stoves mailing list to Send a Message to the list, use the email address stoves@lists.bioenergylists.org to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org for more Biomass Cooking Stoves, News and Information see our web site: http://stoves.bioenergylists.org/
_______________________________________________ Stoves mailing list to Send a Message to the list, use the email address stoves@lists.bioenergylists.org to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org for more Biomass Cooking Stoves, News and Information see our web site: http://stoves.bioenergylists.org/
