Carbon sequestration research and trials in Australia ......using Agricar as a soil ameliorant.
Soils offer new hope as carbon sink | NSW Department of Primary Industries Catalyst: Agrichar – A solution to global warming? - ABC TV Science
From my understanding the process is not dissimilar to the medieval charcoal ovens....where wood was I piled up, then mud igloo type structure formed over it, then ignited inside and low O2 combusted...extinguished and dismantled when at charcoal stage....these days is called called pyrolysis...and is more high tech and exacting.....and scaled-up.
Going Carbon Negative
Im pretty familiar with purification too...I've a Laboratory background...and heavily involved in monitoring the Reverse Osmosis water purification system from non-potable water (for Lab. use). Processed.....then held in tanks till required.
As long as membrane filter (series of sizes down to 0.22um) are changed regularly and regular back wash cycles are run for the sand filters and ionic exchange filters, this water is THE ABSOLUTE purest you can get.
In the s'market (Aust) there only one that is RO water...Nobles Pure Eau...and the only one I would buy....for batteries, irons etc and good drinking too.
I would 100% drink anything that gone thru RO...even sewerage.....mind you...it would be too expensive to process at RO for just irrigation purposes...or toilet flushing.