gmdiny Posted October 22, 2020 Share Posted October 22, 2020 Hello, We have been having issues with stalled/slow fermentation of our Bourbon and Rye Whiskeys: Here is the breakdown of the process with temps, ph values and SG and FG: Heat about 150 gallons of water to 190F, add corn. Add SebStarHTL Add SebStarFLO Let rest for 45mins to 1 hour Add rye and barley and water to bring down to 150F and top total volume to 900 gallons Add SebStarGL (glucoamylase) Let rest for 1 hour Cool to 90F Pitch yeast I use LD Carlson Dry Active Distillers Yeast Rehydrate in 90F Water Add 6 packets (453 grams ea.) to water Let sit for about an hour Than transfer into fermenter when wash is at 90F Starting gravity is between 1.08 - 1.09 Starting PH is around 6.7 and works its way down to about 4.0 PH of water going into the mash is 6.3. We aerate before the yeast is added using an air compressor. We do grain in fermentation, so nutrients should not be necessary? When everything was working the way it should, they would ferment dry in about 5 days. For the last 2 months, they will ferment hot and fast for about 2 days, then slowly trickly off and eventually stop completely. Any help at all would be much appreciated. If you have any questions please ask. I have no idea why they are stalling. Thanks,Greg Link to comment Share on other sites More sharing options...
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