You can call it a high temp oven, furnace, incinerator, or thermal oxidizer. Some things have to be incinerated(1600-1800 degrees), and some things can go to a hazardous waste landfill. But you want to keep this type of stuff out of the municipal landfill. And to save money, some of this stuff can be incinerated at a cement kiln rather than a hazardous waste incinerator.
On this particular issue, what is the protocol or regulation dealing with a blastocyst, an embryo, a fetus, or a stillborn child?
What do they do with used syringes. What does a hospital, a doctor, a dentist, or a veterinarian do with bloody gauze?
What does a GM auto plant do with their dirty solvent? What does Bubba's body shop do with his dirty solvent? What does Halliburton do with their fracking waste?
How much cheating is going on? How much does it cost to dispose of this stuff. Its expensive. Not just the cost of disposal, but also the cost of record keeping. Whether it is medical waste or industrial waste, a lot of it gets diverted and dumped. Its not uncommon to find large numbers of syringes washed up on the shore of the local lake. Its not uncommon for a body shop or a dentist to throw their hazardous waste into the dumpster and it ends up in the muny dump.
They either recycle the water or inject it in a well. They don't burn it.