https://www.usnews.com/news/best-states/articles/2020-03-12/more-states-legalize-alkaline-hydrolysis-dissolving-dead-bodies-in-water
this is probobly whats being used to dissolve the body.
ill just leave a quote from the article that says the important thing.
"A body is submerged in a solution of heated water and lye. After a matter of hours, everything but the bones dissolve into a liquid made up of water, salt and other components safe enough to go down the drain. The remaining bone fragments can be crushed into ash for scattering, burial or memorialization"
idk if its true just found it.