I tend to agree with this, as a hobby project I've been designing a nominally self sufficient cost effective habitat for 500 to 2000 people (roughly 500 "family" groups). And sanitary waste disposal is an issue. My current thought is 'hole in the floor' type latrines and a wind (or solar) powered system which periodically dumps water through the system to move everything to the collection site. At that point you might be able to employ some of these techniques as a more generalized form of management.
