Don't know that's quite the same thing. Sounds like you eductor is entraining air rather than creating cavitation.
Takes quite a lot of power to get liquids to cavitate ... I first saw the results when I started in the marine industry. It was on the bronze propeller of a large tanker. The edges of the blades were quite badly eroded, just like they had rusted away.
it happens when a tiny void in a liquid is put under extreme stress so that it collapses and implodes. The result is thought to be a minuscule jet of liquid that can erode metal or in this case mix liquids together. Good wiki page here ...
https://en.wikipedia.org/wiki/CavitationI had a brief discussion about mixing with a mate (yes, I have a couple) who's big on chemistry. He recons violent mixing will only speed up the process, not make it any more thorough. So a slow, low shear paddle in the tank will do equally as well, it'll just take longer.
On that note part of the discussion was that really aggressive mixing may encourage the glycerin to break into smaller and smaller parts which will take longer to drop out. This could possibly explain why some people get brown deposits dropping out of bio for some time after completion.
