[inkcapmushroom]

SCOBY is basically a waste product from producing kombucha, you have to remove an amount from each batch which (in the case of home brewing) is usually given away to others for free or discarded, not sure how they handle it with industrial-scale kombucha making. So this could be more of a clever recycling that doesn't produce any more CO2 than was already being produced during the making of kombucha.