Sorry, I fat fingered a bunch of stuff. I'll start over.
Wort into the fermenter: I saw in another post that you step mash with a long beta rest, then alpha rest and mashout, with constant recirculation. That must give you super clear wort. Do you send clear wort into the fermenter, or do you carry over some cold break for nutrients? I know there’s a lot of debate on that. I’ve leaned toward super clear wort and just add yeast nutrient cold side.
I make enough wort to to get very clear wort into the fermenter. Like you I add the nutrient to the fermenter by boiling 3/4 cup of distilled water and add the nutrient and Fermcap. This helps dissolve and sanitize the nutrient and the Fermcap. Fermcap reduces foaming when wort is added to the fermenter.
The clear wort has all the nutrient the wort needs with the exception of zinc. By adding the nutrient to the cold side you reduce the zinc being stripped by the trub in the boil. The zinc will drop out of solution in the boil and even if the trub is added to the fermenter the zinc will not be available to the yeast.
By reducing the trub in the wort you also reduce lipids, which the yeast could use, but too much leads to premature staling.
Sulfur control: I’ve started ramping the temp at the end—not for a D-rest, but to help drive off sulfur. Even if it’s at a reasonable level for German lagers, I’ve had judges ding me for it. I’m talking specifically SO₂, not H₂S. Just wondering if you’ve noticed any sulfur hanging around with your cold + pressurized fermentation/spunding setup—or if you’re doing anything else to deal with it.
All lager fermentation will produce some sulfur. Lagering goes a long way to reduce sulfur compounds. There are studies to suggest that low levels of FAN will produce more sulfur. That seems to be true when making a high adjunct beer. Oxygen ingress will impact your ability to lager for longer times. I found the American Lager needs 6 weeks and the Pils needs 8. One of the judges commented on the Pils "no sulfur, but still okay" , seems to me he was expecting sulfur, but none did not take away from the beer
Packaging side: Besides a closed transfer and purged keg, do you do anything else? Like using ascorbic acid or metabisulfite post-crash?
I add 1/2 to 1 gram of PMB when I clear the beer with gelatin 48 hours after crashing. I have a modified 1/4 barrel tall Sanke that allows me to keep positive pressure in the vessel to prevent oxygen ingress. So when I open the top the co2 is inject into the first gas port and vented out the top and when the top is put back on, the second gas port vents through a airlock. I allow it to purge after once it closed up for a minute or 2. The vent pressure is about 2 PSI. Oxygen ingress on the cold side is a problem for homebrewers and pro's alike. It wrecks a beer in a hurry.
Sorry for the wall of questions—I’m just super into lager brewing and always looking to learn from others who’ve clearly nailed it. Big congrats again on the wins!
Thanks for the compliment, but I don't feel like I nailed yet. I think it was a bit of luck for sure, I do like geeking out on this stuff, so the questions are welcomed. Lagers are by far my favorite beers to brew. They are demanding mistresses.
Hope that helps!
Wayne
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