I was thinking that the yeast that setteled out first and covered by the next layer would nolonger be in contact with nutrient and go dormant. :unsure:
The bulk of the yeast will stay in suspension. When the sugars are largely consumed, the yeast will begin to flocculate and settle to the bottom. You basically have a glass conical there and it will work a treat, but please please explain the thing to me, where did you get it, how do you fill it, what is the copper pipe for etc etc. It looks a little like something that landed in Roswell in the 70s .
Made it the demejon from LHB.The pipe is to let the gass escape from the head space.The tests runs were filled through the sample/drain point with a mag pump.
Nice concept mate, very innovative. The only thing I'd worry about is if the blow-off tube blocked with condensed or dehydrated yeast, pressures in that glass demijohn might get a tad dangerous.