Just week we had a former employee of a very, very large shop here in the Pacific NW stop by to say hi. Super great guy. He was head of R&D at the company for a few years. He said they had a waste company come and properly dispose of all of their left over discharge, water base, and plastisol inks. He said they tried to recycle what they could but at that level when you have 55 gallon drums of leftover inks every other week nothing is going to work but a waste company. We are nowhere near that level! Hahaha. Oh my lord no. But we do collect 5 gallon buckets of leftover discharge every few months. And the chemical we dumped in to harden it did nothing. So back to taking it to the Transfer Station/Dump for proper disposal in the state of WA which would be incinerating. Seems like it would just be released in the air but I assume the extreme temp hopefully just destroys everything.
We do recycle our plastisol inks though