Originally Posted by Davydd
Advanced RV is building a composting toilet for a customer right now. It wasn't installed yet when I was there at Advanced Fest so can't tell you much about it. We are easily getting 10 days between dumps and taking on fresh water in our Advanced RV without coming close to absolutely needing to. So I imagine one plans some extreme boon docking conditions or is doing it for some principle. There are just too many convenient places to dump and take on water in the USA that it would be one of the least of my worries in RVing.
I think the advantages are -
No black tank, extra space for fresh or gray
No fresh water used to flush.
No paying to dump black tanks.
I know out here on the west coast, dump stations are actually not that easy to come by, and you have to pay.
Also you don't have to deal with anything stinky, like you do when dumping black tanks. Not to mention cleaning and maintaining tanks and maybe macerators.
I spent a week visiting an old girlfriend in a college dorm with composting toilets. They were amazing, they really should be more popular.