This is a thought experiment with real/physical world application.
Degrowth transitioning to a circular regrowth bioeconomy? Sustainable adaptation? Carbon negative survival?
A backup or primary survival system using biochar for Carbon Removal in a Cascade of Uses (CRCU).
More for your biochar! Appropriate for 'on-grid' household (backup) or 'off-grid' household/bush shack/love shack/AirBnB/Tiny House/remote villages and communities/refugee camps etc. (primary).
This can change the game for sustainably meeting basic physical human needs.
Parts (base to top):
Tech notes
Applications
Operation
Built with 2 x 20 Litre food grade plastic buckets with lids (which may or may not be BPA free). Water is added to the top bucket and filtered via gravity through stones eg.scoria ->unmilled biochar->medium milled biochar->finely milled biochar->cheesecloth->dripped through a drilled hole pattern within a bottom central and circular footprint. This drilled area matches the diameter of a single hole sawed into the lid of the bottom bucket. In my system, it takes about 45 minutes for filtration. This time will vary from system to system.