I'm just a home gamer so could be wrong. In large commercial breweries it is killed off, flocculated out with a flocculation agent then filtered out. It is kill

I'm just a home gamer so could be wrong. In large commercial breweries it is killed off, flocculated out with a flocculation agent then filtered out. It is killed at a certain time so the amount of remaining sugar is controlled. Some microbrews don't do this and you can recuperate live yeast from those beers for brewing or baking.