Couple of fermentation questions

Putting older posts here. Going to try to keep the novice forum pruned about 90 days work. The 'good' old stuff is going to be put into appropriate forums.

Moderator: Site Moderator

Post Reply
shaggyinoz
Novice
Posts: 18
Joined: Tue Jan 11, 2011 7:44 pm

Couple of fermentation questions

Post by shaggyinoz »

Hi all,

I'm having some problems with a couple of washes that I recently made. I've been using the tomato paste/sugar wash recipe from this forum quite succesfully, so recently decided to do a back to back fermentation and run of both a sugar wash and a dextrose wash (I know this has been done to death before, but I love this hobby and thought I'd start exploring for myself :)) The problem I've got is that my washes seem to be taking forever to finish and im wondering if I should be doing/adding anything to them? I started the sugarwash too high I reckon.....starting SG of 1.120 whereas I normally start them at 1.080. So that might be part of the problem with that wash. However, I started the dextrose at 1.095, which I thought was within the reasonable limits of Dextrose pitched with bakers yeast? The sugarwash is 28 litres and the dextrose is 25 litres. Both were strong starters with plenty of foam within an hour of being mixed. I used identical ingredients to those that I have used for my previous 5 succesful ferments/runs. Both washes were made 8 weeks ago and at 4 weeks they were SW @ 1.065 and DW @ 1.040. Now, another 4 weeks along they are SW @ 1.050 and DW @ 1.019. Both washes are still bubbling, but very slowly. They also appear to have already started clearing?

It is worth noting that the weather has gone cold down here in South Oz now (about 14 - 17 degrees celsius most days) and that my washes usually ferment fully within 8 days during our warmer summer weather. I've recently wrapped both of my fermenters in a blanket, so at least they look toasty warm!

Any comments or ideas are welcome. Although everything else I've tried so far has been succesful, im still a total novice, so throw anything at me and I promse I won't be hurt! Thanks in advance for your help.

Cheers, Cam
Dnderhead
Angel's Share
Angel's Share
Posts: 13666
Joined: Sun Dec 23, 2007 8:07 pm
Location: up north

Re: Couple of fermentation questions

Post by Dnderhead »

ya some heat thats on the lower end of fermenting, 1.120 is 16% a bit high.
rubber duck
retired
Posts: 3452
Joined: Tue Feb 10, 2009 9:33 am
Location: brigadoon

Re: Couple of fermentation questions

Post by rubber duck »

Shag you pretty much answered your own question, your on top of it.

Your fermentation temp is to low for abv your trying to push and your SG is to high. Bring your temp up and if that doesn't work make a yeast starter of 1118 and pitch that.
Ideas are like rabbits. You get a couple and learn how to handle them, and pretty soon you have a dozen. John Steinbeck
rad14701
retired
Posts: 20865
Joined: Wed Dec 19, 2007 4:46 pm
Location: New York, USA

Re: Couple of fermentation questions

Post by rad14701 »

Should we be assuming that these two washes are Birdwatchers or are they something else...??? If they aren't then what are you adding for nutrients...???

With bakers yeast, and many others, once you get to a certain gravity you add as much as three days of fermentation time per 1% of potential ABV... Combine that with the cooler temperatures and you can compound that into extremely long ferments...
shaggyinoz
Novice
Posts: 18
Joined: Tue Jan 11, 2011 7:44 pm

Re: Couple of fermentation questions

Post by shaggyinoz »

Thanks for the fast replies,

Both washes are Birdwatchers, so I guess I was pretty much asking for trouble starting the sugarwash at a relatively high SG rather than just following the original instructions......which, by the way, have never failed me previously! I will try to bring the temp up some more over the next few days.

Cheers for your knowledge and help.
olddog
retired
Posts: 3618
Joined: Fri Jan 16, 2009 6:16 pm
Location: WEST OZ

Re: Couple of fermentation questions

Post by olddog »

I am currently using heat belts to keep temps up. :thumbup: :thumbup: :thumbup:


OD
OLD DOG LEARNING NEW TRICKS ......
Post Reply