Tag Archives: kveik

Apr 202204Mon

It’s 21:15, about eight or nine hours since pitching, and this Kveik has just taken off in the last hour or so. I’m seeing a growing carpet of foam on top of the wort and have fitted a blow-off bottle, moving the spunding valve away from the likely erupting Krausen.

I’ve set the spunding valve to 10 PSI by dialling it high and filling the blow-off bottle from my CO2 tank, then reconnecting the valve and opening it until the pressure dropped back down to 10. Unfortunately I didn’t de-pressurise the bottle further, and when I reconnected it to the FV a small amount of sanitiser rushed up the dip tube as the vessels equalised. Hopefully that won’t trouble the wort or the yeast too much in this important early stage – oops!!

Mar 202217Thu

It’s 18:00 and there’s a good amount of Krausen atop this brew now, so I thought I’d capture some for future use before it gets too far into development. Cleaned a big jar and a ladle, gradually de-pressurised the Fermzilla, and filled that jar with glorious foam. Once that was done I fitted the jar’s lid and swung it about in order to compress the foam through G-force, allowing me to get another couple of spoonfuls in there. On refitting the Fermzilla’s lid I saw the pressure climbing up again, hitting 10 PSI 15 – 20 minutes later. The jar’s in the fridge and the contents will be decanted onto parchment and dried then frozen at some stage.

Mar 202217Thu

According to the Tilt, things started happening around 04:00, and when I checked in this morning there was a good covering of foam on my brew. I didn’t bother calibrating the spunding valve yesterday because I’m short of gas (in fact I’d almost forgotten to refit the valve after swapping out the first Tilt) so I just guessed the number of turns needed for my target of 10 PSI, and that transpired to be closer to 20 PSI. Sorry Fermzilla, sorry Tilt! I backed the valve off gradually over the next couple of hours and she’s now sitting pretty at 10, will leave it to build a bit longer before harvesting some yeast.