Milwaukee’s been doing this for decades.”
I think Milwaukee has been selling “ZOO DOO”, for fertilizer for your garden....all from animals.
I am pretty sure this is residual from waste treatment plants- which can contain anything that went into the sewers. Household chemicals—industrial chemicals—urine from women taking birth control pills—persons taking antibiotics—medical pot—lots of stuff.
I don’t want it on food I will eat.
It’s called Milorganite. It’s from the Milwaukee sanitary sewer system.
Sludge is cancined and sold in dry 40 pound bags.
Composting animals waste would be fine....unless it came from the sewer. On my family farm ,we've used cow manure as compose for centuries(literally) Very good in fact.
But then we don't inject out farm animals with lead, mercury and female hormones....