What is everyone's thoughts on yeast dumps?

**kal** · Last edited by kal on Fri Jun 14, 2019 8:51 pm; edited 2 times in total

Original post by alphakry was accidentally deleted so I grabbed the text and am quoting here:

alphakry · Joined: 27 Oct 2018 Posts: 88

Thanks Kal! I had meant to post this in the blonde ale post - but you’re quick!! I had deleted it only minutes later but you already replied! If you’d like, please delete this message and move your reply there for continuity! And thank you for your reply and thoughts!

**kal** · Posted: Fri Jun 14, 2019 8:49 pm Post subject:

I already nuked the other one... Wink

Given that your question's not recipe specific, I've split it and created a new thread in the "Yeast & Fermentation" sub-forum.

Kal

alphakry · Joined: 27 Oct 2018 Posts: 88

That is good to know that there is no real need in your opinion to dump.

Looking at process guides elsewhere, they advise the dump even before the DMS rest, rather advising "When fermentation has slowed - about 7-10 days after your brew day" - just before cold crashing. I was comfortable doing the dump in my 1BBL conical the first time around, assuming I was minimizing the chance of pulling up much sediment once I start rotating that racking arm down... but I can give it a go not dumping and see what differences I notice.

It seems to me there wouldn't be much harm in the dump unless done too early and not allowing the DMS rest.

I did slap my pressure gauge onto the conical once gravity steadied - and I've noticed the CO2 has slowly built up to about 5PSi by now... so I guess even at this point of "completion", theres still a bit going on in there.

**kal** · Posted: Fri Jun 14, 2019 9:42 pm Post subject:

alphakry · Joined: 27 Oct 2018 Posts: 88

**kal** · Posted: Fri Jun 14, 2019 11:24 pm Post subject:

Yeast autolysis can happen with large batch sizes due to the heat/pressure but it's generally considered to not be an issue on homebrew sized setups. I’m not sure why they’re recommending that. Most brewers these days do single vessel fermentation until fermentation is done for best results.

Kal

alphakry · Joined: 27 Oct 2018 Posts: 88

Thanks Kal. So sticking with the Blonde Ale recipe, why would you recommend in the final steps to "rack to CO2 purged brite tank (secondary)" before cold crashing ? If using a conical, wouldn't the yeast dump before/after the cold crash be the equivalent and provide the same benefits as moving to a secondary in this scenario?

**kal** · Posted: Mon Jun 17, 2019 12:42 pm Post subject:

Both work. There's no right or wrong way. It depends on your process / equipment.

See my FERMENT AND PACKAGE article for details: http://www.theelectricbrewery.com/ferment-and-package

Gelatin works better at colder temps and can then also get rid of chill haze (which will go away naturally too) but lowering the temperature always causes liquid to contract so you will suck in air or liquid from your airlock if you don't have some way of introducing CO2 pressure to compensate.

I only ever raise the temperature throughout fermentation and only lower it once I'm in the keg on CO2 pressure for this reason. If you have a safe means of introducing CO2 pressure to your fermentation vessel as the temperature is being lowered then go for it. Some people will use balloons filled with CO2 to offset but I've never liked this idea as it's finicky, and rubber isn't a 100% airtight seal.

Kal