As far has compost toilets go this one is pretty snazzy. Having used facilities in Mongolia which is a hole over an open pit 3 meters below. Azerbaijan which used to have the worst toilets imaginable. Just piles of poop which you add to and have no where to go. World records in breath holding have been smashed in these delightless cholera corners and much footwear rendered un-salvagable. Anyway I digress..
Upstairs bus toilet will be an 12v electric powered construction which will separate liquids from solids, which will produce garden compost for solids and cost a small fortune. Below is a video about one of the models I m looking at. If anyone from Sweden is reading this. What do they cost over there?
When living off grid the whole question of toilets and the waste we, via them produce, can be a sticky topic!
At the moment I am using a beautifully constructed wooden toilet in a wooden hut. Instead of water, sawdust (lots being created at the moment) is sprinkled on the contents below.