Uses for Biochar
The number one thing to understand is the word biochar means biological charcoal and it's primarily labelled for charcoal being used in agricultural use, but we put different grades to different uses.
For water filtration, it's as simple as putting it in a linen bag and dipping it in your dam or tank to collect all the pathogens.
Or for your greywater system, add it to your reedbeds to assist with filtration.
As a building material- in concrete it gives a lot more strength. As a render, it gives a lot more breathability in humid conditions because the surface area has high aggregate strength.
Biochar can be used in emergency poultices- if you have a snakebite you put biochar straight on to the bite, wrapping it in a bandage to absorb the venom which can be later extracted to identify the correct anti-venom.
Biochar is known to pull out heavy metals if used for detoxification. In small amounts it is also good in animal feeds to draw out pathogenic bacteria.
It has fantastic holding and absorbing properties, so where ever odours are encountered, it can be used- in compost toilets, in fridges to absorb volatiles and keep vegetables from wilting.