This article:
https://modernfarmer.com/2022/06/dairy-farmer-turning-manure-into-water/
describes a 10 million dollar machine that makes cow flop into purified fertilizer and distilled
water.
Over kill? Yeah, I think so. I'm sure it uses a bunch of
energy, but the organic farmer in this story thinks its worthwhile to the point he has invested his own money in the company.
Compared to traditional composting, it is faster, and it may preserve more nutrients, nitrogen in particular.
Compared to a biodigester I have no idea.
Could this process be done with a less expensive machine?
Could it be powered with waste heat from charcoal making?
Could it be powered by a biodigester?
I've often thought a
solar still could do something similar.