@Helengraham There is a co-housing community in Portland, Oregon, that operates a large and code-compliant humanure facility.
It's code-compliant because they went to the international plumbing code authorities and advocated for their system. That's a huge undertaking.
Kailash EcoVillage https://www.kailashecovillage.org/composting
@Helengraham It's much easier to manage poo if you separate it from pee, at the source.That's called "urine diversion."
Poop is dangerous, full of infectious pathogens, but, fortunately, we make a very small amount of it, about a quarter of a liter per day per person.
We produce ten times that volume in pee. Pee is not dangerous, just heavy to schlep around. It's good fertilizer for acid-loving plants.
@Helengraham How do you separate pee & poo -- hop from bucket to bucket? Nope. There's something called a "urine-diverting toilet insert." It has a funnel in front that catches the urine, and channels it to a separate container, while the poop falls straight down into the main container.
Here's a DIY method: http://www.thefloatingempire.com/2018/02/diy-urine-diverter-for-bucket-composter.html
You can find many urine diverters for bucket toilets, just google "urine diverter."
Helen Graham
Merilee D. Karr, MD, MFA
Pollinators