they have been around for quite some time.... simple affair.... Bucket with a liner seat of preference same bucket sitting next filled with sawdust .... After you finis you scoop some fresh sawdust and sprinkle on top.That different than the composting ones?
Lots of kinds now...interesting.
If you build it right you can put in a urine diverter which sends it to another container that you add water to. That can be put directly in the garden.
The solid waste can either be disposed in the regular trash OR sent to a compost bin for composting and eventual use in the garden.
http://humanurehandbook.com/humanure_toilet.html
This is just insane. How do you folks in the south survive this? My poor Aussie hen was suffering so bad at bedtime last night I had to run a fan in the coop for the first time ever. The watches and warnings are up but the storms won't hit us until round noon. In the meantime the air is so heavy it's like trying to breathe with your head in a water bucket. Don't think there will be much work being done today.