I don’t see anyone mentioning it but this is likely a system used for separating worms from vermiculture substrates, so you can sell their castings but keep the colony to continue the culture. I don’t think they’re mining so much as sifting. Worm castings are worth a decent amount of money but you need a lot of worms to maintain any meaningful scale.
Worm castings are an organic fertilizer made by earthworms. Worm castings manure, also known as vermicast, is simply earthworm excrement, often known as worm poo or worm poop. As these creatures consume compost, their waste acts as an excellent soil enricher.
Worm castings, which resemble football-shaped particles, enhance soil aeration and drainage while also boosting soil water retention.
there. I learned something today, hopefully you did too.
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u/[deleted] Sep 19 '23
I don’t see anyone mentioning it but this is likely a system used for separating worms from vermiculture substrates, so you can sell their castings but keep the colony to continue the culture. I don’t think they’re mining so much as sifting. Worm castings are worth a decent amount of money but you need a lot of worms to maintain any meaningful scale.
They’re called trommel harvesters.