I've always heard filtered to bring it to sterility, but there have to be other steps to flocculate. Micro brews or traditional European brews are often bottle

I've always heard filtered to bring it to sterility, but there have to be other steps to flocculate. Micro brews or traditional European brews are often bottle finished. Some micro breweries use a finishing yeast that's different than the fermentation yeast to keep that proprietary. I think anchor brewing comes to mind for this.