khanti
Well-Known Member
A batch I brewed a few weeks ago became infected in the primary and turned into this foul-smelling, foul-tasting, cloudy mess. I let it sit for another week thinking maybe I could salvage it somehow, but eventually dumped it. 8 days ago I brewed a batch of the same recipe and now that same smell is coming from the airlock and the same little 'balls' of bright white stuff are appearing on top of the little kreusen that is left.
Here are some details.
First batch. Extract ale. Simple recipe. 1lb Crystal-10 steeped for 30 min at 155. 5.25lb EL DME. 1/2lb of DME was added at beginning of boil, remainder was added with 15 minutes left in boil. 2oz Amarillo leaf hops added 1/2oz at 20 min intervals over the hour boil. Full Boil. Cooled with immersion chiller to 70 deg then poured through funnel/strainer into plastic bucket fermenter. Sloshed around a bit and then pitched 1 pkg rehydrated dry nottingham yeast. Fermentation got off to a really slow start (4-5 days before any activity), suspect the yeast was old. My guess was that the slow start allowed the infection to take hold.
Second batch. Same recipe as first with two exceptions. I used a liquid 1056 yeast starter that's been washed through two prior batches. The other difference is the fermenter was a 6.5g glass carboy. Much quicker start to fermentation (less than a day), but within a week it had the same funk going on.
The only things that touched both batches on the cold side were the immersion chiller (which should be sanitary as it was put in the boil kettle at flame out) and the strainer/funnel. The yeast was totally different and the fermenters were different. I'm left racking my brain trying to figure out how the second batch got infected. I think I practice pretty good sanitation technique. I use Star-san at recommended concentration on everything prior brewing, leaving it sit for at least 30 min and re-wetting periodically from a spray-bottle. The funnel is plastic and I have it soaking in star-san overnight. It was practically brand new, the first infected batch was only the second time I'd used it. The strainer is stainless steel, but is pretty old and not dedicated to brewing (maybe this is it?)
Any ideas? This is getting frustrating!!!
Edit: Forgot to take OG reading on second batch so the turkey baster did not touch both batches...
Here are some details.
First batch. Extract ale. Simple recipe. 1lb Crystal-10 steeped for 30 min at 155. 5.25lb EL DME. 1/2lb of DME was added at beginning of boil, remainder was added with 15 minutes left in boil. 2oz Amarillo leaf hops added 1/2oz at 20 min intervals over the hour boil. Full Boil. Cooled with immersion chiller to 70 deg then poured through funnel/strainer into plastic bucket fermenter. Sloshed around a bit and then pitched 1 pkg rehydrated dry nottingham yeast. Fermentation got off to a really slow start (4-5 days before any activity), suspect the yeast was old. My guess was that the slow start allowed the infection to take hold.
Second batch. Same recipe as first with two exceptions. I used a liquid 1056 yeast starter that's been washed through two prior batches. The other difference is the fermenter was a 6.5g glass carboy. Much quicker start to fermentation (less than a day), but within a week it had the same funk going on.
The only things that touched both batches on the cold side were the immersion chiller (which should be sanitary as it was put in the boil kettle at flame out) and the strainer/funnel. The yeast was totally different and the fermenters were different. I'm left racking my brain trying to figure out how the second batch got infected. I think I practice pretty good sanitation technique. I use Star-san at recommended concentration on everything prior brewing, leaving it sit for at least 30 min and re-wetting periodically from a spray-bottle. The funnel is plastic and I have it soaking in star-san overnight. It was practically brand new, the first infected batch was only the second time I'd used it. The strainer is stainless steel, but is pretty old and not dedicated to brewing (maybe this is it?)
Any ideas? This is getting frustrating!!!
Edit: Forgot to take OG reading on second batch so the turkey baster did not touch both batches...