Target

 

§ Explore possibilities to make biobriquettes from foresting leftovers (twigs, leaves, wood chips)

Necessity

 

§ Biobriquettes exhaust less fumes and tar than burning wood thus decreasing health issues

§ the briquettes can provide employment and income for villagers

§ the usage of briquettes can potentially decrease wood usage and help prevent deforestation

 

Process

 

§ for the 1. experiment Subambool seed pods where colected

§ the seed pods where carbonized (anaerobically heated) in a paint barrel using the solar cooker present at barefoot college

§ after a little more than half an hour the seed pods where carbonized, some leaves had started burning as a small amount of oxigen managed to reach the material

§ the barrel was covered and left to cool off and suffocate the flames

§ the carbonized pods where smashed to create a coal powder

§ the coal powder was mixed 3:1 (volume ratio) with sand (binder)

§ water was added to the mixture

§ the created sludge was filled in a crude mold and compressed by hammering

§ the created briquettes where left 3 days to dry

§ the briquettes were lid up using some twigs and paper, after taking fire the briquettes would slowly glow

§ the final product was very fragile, slight pressure would make the briquettes crumble, this is believed to be due to the inferior binding qualities of the sand as well as the inferior compressing and thus low density of the briquette due to the improvised mold

§ also not the whole briquettes would burn as the briquettes would fall apart due to its fragile nature

§ it was tried to heat water using the briquettes in a plant pod, the water became quite hot but would not boil, this is believed to be due to the inferior “stove”-properties of the plant pod

 01

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§ for the 2. experiment Sumbabool seed pods where colected

§ the barrel was more tightly packed this time

§ a different lid was choosen to better prevent oxygen from reaching the material

§ material again was carbonized and smashed into coal powder

§ a differents sand was choosen

§ mixing ratio with sand was again 3:1 (volume ratio)

§ experiment pending (improved mold for briquettes needed)

 

Conclusions (so far)

 

§ density has to be improved

§ dedicated mold needed

§ further experiments with binders needed

 

Prospect

 

§ pending

 

References

 

[1] https://www.youtube.com/watch?v=HQfp-XIxNq0

[2] http://leehite.org/ewb_project.htm

 

Appendix

 

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