Biochar coffee husks is today’s learning curve project.
I went to give a demonstration of the Tlud gassifier stoves and a bigger home made Johnny Rodger tlud to green mountain coffee in Northern NSW. It was a wet day and we had the luxury of a beautiful freshly roasted organic coffee to really get our minds into gear for the task at hand with the further effects of unable to keep my mouth closed lol yap yap yapp yada yada yada Nice Coffee.
This organic coffee company has a big pile of coffee husks that they would like to turn into biological charcoal and feed the char back to the coffee plants.
Simple I thought we will run these through a gasifier and that will be it.
We tried introducing more primary air from the bottom but it kept putting the flames out. We then tried adding more secondary air from the bottom with no luck either. We tried extending the chimney for better draw and still no improvement. Finally we tried introducing the primary air into the top of the tlud and this seemed to work.
Here is what I believe is one of our problems.
The coffee husks although very dry are unable to hold a flame so when using them straight in a gassifier they do not stay alight.
Solution : )
Because you all know how I like to solve problems.
Ask the biochar community for any ideas that may work (This is the easy way)
Experiment by myself (this is the harder way).
My first idea is to introduce a piece of firelighter charcoal soaked in metho onto the top of the husks in a Tlud this way the charcoal can maintain a flame while the surrounding coffee husks turn into char.
What do you think out there in bio char experts land ?
Please comment below with any ideas you might have that will help me over come this problem and allow me to write up a informational page for pyrolizing coffee husks. All information will be maintained as open source / public domain so everyone can learn this great new technology.
Charmaster Dolph Cooke