I’ve looked into them. Morganite is one example.
The raw waste is typically free or the “recipient” is paid a small fee. They then process it to remove metals and harmful bacteria and then it can be marketed.
I have lots and lots of very arid, well drained, land.
So I skip the middle man and let them dump raw poop on the pasture. Mother Earth processes the bacteria (which can’t persist too long), hormones, and everything else.
Time, bugs, growing plants, then scorching heat takes care of it.
And then, voila, fantastic crop land.
Where it turns bad is when people get in a hurry and try to plant crops at the same time. Mexico does this.
There is always at least 5 years and two crops of hay between when I use it for human food. (Not counting cows that eat hay.)
that’s freaking interesting.
Too bad its not economic to ship all of america’s poop to american deserts where it would make the land productive.