I tend to agree with this, as a hobby project I&#x27;ve been designing a nominally self sufficient cost effective habitat for 500 to 2000 people (roughly 500 &quot;family&quot; groups). And sanitary waste disposal is an issue. My current thought is &#x27;hole in the floor&#x27; type latrines and a wind (or solar) powered system which periodically dumps water through the system to move everything to the collection site. At <i>that</i> point you might be able to employ some of these techniques as a more generalized form of management.