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Very Weird... Had 2 bourbon batches done simultaneously, SG 1.075 FG 1.01, same as before. Ran through the column still, usually we get 10-12 gallons of hearts at 80%, this run we ran heads, and it essentially dropped straight to 40% abv, and ran out 10-15 gallons of 40%!!! Usually without any cold water into the dephlemgator we keep the run between 70-80%, but even with cold water we couldn't even fill our plates....never seen this happen before any thoughts???? If the alcohol is present we hypothetically should be able to run a higher abv, just slower?!?!?!? BTW, 2 changes we made this run 1) Previously we haven't tested PH, (to clarify, we figured our our formula for the correct PH - 25g of Citric acid into 100 gallons of water - we stopped testing, but decided we should perfect our PH reading due to water fluctuation) so this time we were very careful to get PH to 5.75, where in the past we'd add our 25g and keep on mashing... 2) After fermentation, we let it sit for 2 days, as we couldn't run the still... Could either of these things cause our problem? Thanks everybody,
We are making corn whiskey – thanks to all of you who helped us get through our mashing and fermentation issues. I would seriously be screwed if it wasn’t for these forums helping us trouble shoot. By the way, it tastes great!!!!! We ran our 80% corn 20% barley wash @ 5% ABV through our column still with two plates. Run started great, we were able to run it @ 160 proof for most of the run – my question comes in as the run started tapering off from 160 proof and down. Do you typically run it at the same temp and just let the ABV decrease and try to keep the flow steady, or would you be willing to run slower and keep it at a higher ABV? My thought process was that as we will be diluting this to 40-50% ABV, we might as well keep running it down and make cuts as the flavor dictates, but I could also see slowing the run to keep a higher proof distillate. Also, I couldn’t find many column still operation conversations, so maybe this is a good place to have it?