Stalled TPW

Just starting out and need some advise? then post it in here.

Stalled TPW

Postby Crusty » Sun Aug 07, 2022 10:09 am

Hey all.
What do you guys do to rectify a stalled TPW. Low night temps & warm day temps resulted in good fermentation activity during the day but no activity at night. It's stalled out at 1.018 from 1.070.
Should I stir it all up & see if it kicks back in or stir it up & add some more yeast to get it to final? It's a 200lt wash.
Crusty
 
Posts: 265
Joined: Wed Dec 12, 2012 9:42 pm
Location: Northern NSW.
equipment: 4" FSD Neutraliser
100lt Milk Can Boiler with 1 x 3600W & 1 x 2400w FSD elements
Head Brewer @The Wobbly Chook Brewing Company

Re: Stalled TPW

Postby bluc » Sun Aug 07, 2022 11:10 am

Stir it up maybe warm it up if possible..
bluc
Site Donor
 
Posts: 8967
Joined: Tue Apr 14, 2015 5:47 pm
Location: sunshine coast
equipment: 2" pot with 2" shotty 400mm long 5x 1/2" on a t500 boiler.
50l keg boiler 4" still mount 4" sight glass 1" drain..
4 plate 4" bubbler, 600mm packed section

Re: Stalled TPW

Postby BigRig » Sun Aug 07, 2022 11:12 am

I wouldn't bother adding more yeast. If it got going initially it will have enough in it already. They just need to be woken up.

Check the water chemistry, what are your readings ?

How long has it been going for ?

If they are ok, then it might need to be aerated and warmed up.

Bluc beat me to it :handgestures-thumbupleft:
Last edited by BigRig on Sun Aug 07, 2022 11:13 am, edited 1 time in total.
BigRig
 
Posts: 752
Joined: Sun Apr 07, 2019 1:29 pm
Location: Brisbane, QLD
equipment: FSD 4" Mac SSG, 50L Milk Can, 2 x 2400w elements, 35L Digiboil Boiler, Airstill.

Re: Stalled TPW

Postby Crusty » Sun Aug 07, 2022 11:23 am

Thanks guys.
I will give it some aeration & see how it goes.
Crusty
 
Posts: 265
Joined: Wed Dec 12, 2012 9:42 pm
Location: Northern NSW.
equipment: 4" FSD Neutraliser
100lt Milk Can Boiler with 1 x 3600W & 1 x 2400w FSD elements
Head Brewer @The Wobbly Chook Brewing Company

Re: Stalled TPW

Postby Crusty » Sun Aug 07, 2022 11:46 am

I've hit the wash with a few minutes of pure oxygen. It's sitting at about 1.016. If no change in a few days, I'll let it clear & just run it. Just have to accept a lower yield this time round. It's the first time I've struck a stalled ferment.
Crusty
 
Posts: 265
Joined: Wed Dec 12, 2012 9:42 pm
Location: Northern NSW.
equipment: 4" FSD Neutraliser
100lt Milk Can Boiler with 1 x 3600W & 1 x 2400w FSD elements
Head Brewer @The Wobbly Chook Brewing Company

Re: Stalled TPW

Postby bluc » Sun Aug 07, 2022 2:30 pm

Oxegyn helps at start of ferment not during...
Prob is with inactivity the yeadt floculate fall out of suspension to bottom of fermenter. Idea is not to add o2 but to get the yeadt back up into the wash to process the sugar..
Last edited by bluc on Sun Aug 07, 2022 2:32 pm, edited 1 time in total.
bluc
Site Donor
 
Posts: 8967
Joined: Tue Apr 14, 2015 5:47 pm
Location: sunshine coast
equipment: 2" pot with 2" shotty 400mm long 5x 1/2" on a t500 boiler.
50l keg boiler 4" still mount 4" sight glass 1" drain..
4 plate 4" bubbler, 600mm packed section

Re: Stalled TPW

Postby Moonshyner » Sun Aug 07, 2022 2:49 pm

I've had 2 stalled washes recently.
When I checked the PH, it was low.
So I threw in a bit of bicarb soda and after about 1 hour it was up and running again.
Moonshyner
 
Posts: 73
Joined: Tue Mar 15, 2022 2:45 pm
equipment: Still Spirits Air Still
Pure Distilling Spirit Maker Reflux Still
AlcoEngine Pot Still

Re: Stalled TPW

Postby Crusty » Sun Aug 07, 2022 4:00 pm

Moonshyner wrote:I've had 2 stalled washes recently.
When I checked the PH, it was low.
So I threw in a bit of bicarb soda and after about 1 hour it was up and running again.

pH is low, under 4.
What did you bring it up to?
Crusty
 
Posts: 265
Joined: Wed Dec 12, 2012 9:42 pm
Location: Northern NSW.
equipment: 4" FSD Neutraliser
100lt Milk Can Boiler with 1 x 3600W & 1 x 2400w FSD elements
Head Brewer @The Wobbly Chook Brewing Company

Re: Stalled TPW

Postby RuddyCrazy » Sun Aug 07, 2022 4:12 pm

Crusty maybe it's time to go have top feed of oysters mate so you can keep the shells for PH buffering :handgestures-thumbupleft:
RuddyCrazy
Mentor
 
Posts: 2439
Joined: Thu Oct 31, 2013 6:36 pm
Location: Not far from Kanmantoo SA
equipment: 4" copper bubbler with a setup for Neutral and a thumper for Whisky and my old 5 litre pot for doing maceration runs and MiniMe the baby pot still

Re: Stalled TPW

Postby Crusty » Sun Aug 07, 2022 4:28 pm

RuddyCrazy wrote:Crusty maybe it's time to go have top feed of oysters mate so you can keep the shells for PH buffering :handgestures-thumbupleft:

I hate those things.
Crusty
 
Posts: 265
Joined: Wed Dec 12, 2012 9:42 pm
Location: Northern NSW.
equipment: 4" FSD Neutraliser
100lt Milk Can Boiler with 1 x 3600W & 1 x 2400w FSD elements
Head Brewer @The Wobbly Chook Brewing Company

Re: Stalled TPW

Postby The Stig » Sun Aug 07, 2022 5:24 pm

The Stig
Site Nerd
 
Posts: 18192
Images: 9
Joined: Sun Jun 19, 2011 8:37 am
equipment: Only the Best will Do.
Mac4 SSG Bubbles of Joy

Re: Stalled TPW

Postby Moonshyner » Mon Aug 08, 2022 1:18 pm

Crusty wrote:
Moonshyner wrote:I've had 2 stalled washes recently.
When I checked the PH, it was low.
So I threw in a bit of bicarb soda and after about 1 hour it was up and running again.

pH is low, under 4.
What did you bring it up to?


Don't know. Didn't check. Was annoyed.
Used about 1 teaspoon and a quick stir just on top.
A few days later fermented to 0.994 - 0.992.

Will be using oyster shells from now on for ALL ferments.
Ordered 1 dozen large oysters for $24 and have to find a way to make them palatable.
Also found a place in OZ that actually sells sterilised oyster shells as course grit.
Only problem is that it's a 20kg bag.
Price is OK at $32.16 + $6.83 postage.
Petstation, Albury, NSW.

Cheers,
Last edited by Moonshyner on Mon Aug 08, 2022 1:22 pm, edited 1 time in total.
Moonshyner
 
Posts: 73
Joined: Tue Mar 15, 2022 2:45 pm
equipment: Still Spirits Air Still
Pure Distilling Spirit Maker Reflux Still
AlcoEngine Pot Still

Re: Stalled TPW

Postby The Dark Alchemist » Mon Aug 08, 2022 4:14 pm

Chicken grit from pet store (CaCO3). When I ran WPOSW, by default I would add a tablespoon into the mix to keep things nice and balanced... Never had a stall.
The Dark Alchemist
 
Posts: 113
Joined: Tue Aug 14, 2018 12:10 pm
Location: Vic
equipment: FSD 200L Milk Can
FSD 4" Pot Still
FSD Neutraliser
Copper T-500

Re: Stalled TPW

Postby Crusty » Tue Aug 09, 2022 11:08 am

Thanks guys.
My stalled TPW is off & running again. After testing the pH, it was low at 3.8 so I added some bicarb soda to get it to about 5.3. I also sprinkled a bit more yeast on top to eat the rest of that residual sugar. I'm pretty sure it was purely the cold night temps here that caused it to stall out, probably prematurely killing the yeast in an acid environment. It's never happened to me before & this is a 200lt wash with no temp control. Hoping it'll hit final gravity in a few days.
Crusty
 
Posts: 265
Joined: Wed Dec 12, 2012 9:42 pm
Location: Northern NSW.
equipment: 4" FSD Neutraliser
100lt Milk Can Boiler with 1 x 3600W & 1 x 2400w FSD elements
Head Brewer @The Wobbly Chook Brewing Company


Return to Beginners Questions



Who is online

Users browsing this forum: No registered users and 16 guests

x