>My question is about using a cylindroconical fermenter. What are the
>standard ways/setups to do primary fermentation and yeast
>harvesting and final racking to bright/serving tanks.
this could take a long time
>heres my take: After primary, open the bottom drain and discard the first
>runnings (mainly trub). Then collect the yeast for later use. The clearer
>beer will follow the yeast and get transferred to secondary or
>Do most breweries transfer the yeast and beer through the bottom drain, or
>do they use a second valve above the sediment to transfer the beer and
>drain the yeast last through the bottom valve?
best bet is the day after or next shift, to pull a little cold break off
the bottom valve, you can also use this to do a fast/accelerated ferment
to determine what the "bottom" gravity will be.
depending on the yeast strain, the cold may need to be applied to the
fermenter to settle out the yeast. this can take anywhere from 2 to 7 days
or more. when harvesting pull the middle layers for repitch. all this will
need to be determined by the tank design, how cold you can get the beer
if the tank is jacketed on the cone (helps when you store for longer
periods be fore drawing off), angle of the cone...it may be advantageous
to have a mid cone outlet with a racking arm. this will allow you to pull
from above the slurry, get a sight glass of some sort to help the process.
then depending on the volume and thickness of the slurry in the cone you can
rack fairly yeast free beer no matter what the yeasts packing ability is.
>The reason I ask is to figure out how to use one of those 15gal plastic
>fermenters. I was thinking of doing the primary ferment in the plastic
>and the racking to corny kegs for self-carbonating/conditioning.
well skip the jackets.....you may want to have some attemperation device
installed inside the tank, with thermometers
>But do I transfer with one bottom drain or 2 valves ? Anyone with
>experience with these fermenters please jump in. (not the
>fermenter,except if you want to clean it.)
one outlet is a pain, it just takes forever to get the bulk of the yeast out.
you may be able to start a siphon from on top rather then spend the expense
of another outlet/valve. my experience is with SS and the $150 butterfly
so it is a lot different. cleaning is the easy part;)