While I've always racked a MUM wash into he still, they are pretty clean, and if you have external heat, like propane, I think you'll be ok. With an electric element, I'd be afarid of scorching.
With the 2 different takeoff rates, it appears that you are putting more energy out the condenser with the second batch, and that could easily explain the increased head temperatures and decreased EtOH concentration. As far as why that much more energy was condensed, I'm not sure, but it has to be some combination of energy input and relative radiated energy loss at the boiler.
Zymurgy Bob, a simple potstiller
To: Distillers@yahoogro ups.com
From: judomax625@yahoo. co.uk
Date: Thu, 20 May 2010 23:25:51 +0000
Subject: [Distillers] fermenting and distilling wash in same container without racking
Hey guys, First, I'm amazed at how much info is now out there on cookin'. I've been cookin for about 10 years now with a stainless and marble reflux still. When I started there was little info on distilling.. .now it seems like everyone has a recipe or technique. Quick question. I'm going to try the MUM recipe and have recently moved into a 45gal SS still(from a previous 15gal keg)and am now wondering if I can just use my kettle as a fermenter and cook off when it's finished fermenting (without racking/clarifying) as this would physically be easier and require less containers/fermente rs? Second question. My system runs about 184-186 proof at 162F at 5400ft MSL and takes about 10hrs to run a 15gal (10% ABV)wash. Interestingly, my new kettle runs (same tower)runs about 180 proof @ 164F and finishes in about 16hrs with a 40 gal wash (10% ABV). Why? Can't quite figure this one out.
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