Boil w/lid or w/o lid
Moderator: slothrob
Boil w/lid or w/o lid
Hello, Could someone tell me what is the correct way to boil, can one use a lid during the boil or should the lid be left off while boiling ? Also could you tell me why ? Thanks..
Boiling
I only use the lid to help achieve the boil, after that it comes off until the boil is complete. At that point, I cover the kettle to keep stuff from falling in since I brew outside.
John Palmer, in his on-line book "How to Brew" says, "Once you achieve a boil, only partially cover the pot, if at all. Why? Because in wort there are sulfur compounds that evolve and boil off. If they aren't removed during the boil, they can form dimethyl sulfide which contributes a cooked cabbage or corn-like flavor to the beer. If the cover is left on the pot, or left on such that the condensate from the lid can drip back in, then these flavors will have a much greater chance of showing up in the finished beer."
It's a good source of info and is at www.howtobrew.com
v/r
Bill
John Palmer, in his on-line book "How to Brew" says, "Once you achieve a boil, only partially cover the pot, if at all. Why? Because in wort there are sulfur compounds that evolve and boil off. If they aren't removed during the boil, they can form dimethyl sulfide which contributes a cooked cabbage or corn-like flavor to the beer. If the cover is left on the pot, or left on such that the condensate from the lid can drip back in, then these flavors will have a much greater chance of showing up in the finished beer."
It's a good source of info and is at www.howtobrew.com
v/r
Bill
DMS & Diacetyl
Boiling with a lid will likely cause DMS (corn/veggie) and/or diacetyl(butterscotch) off-flavors in the beer which are scrubbed out during the boil. The compounds, which are released from the beer with the water vapor will re-condense on the lid and drip back into the batch.
I think it was "mesa maltworks" who posted an interesting story about rolling rock beer and DMS.. it would be worth looking for. Alos, there were several posts on diacetyl and DMS in the past.
Prosit,
Andy
I think it was "mesa maltworks" who posted an interesting story about rolling rock beer and DMS.. it would be worth looking for. Alos, there were several posts on diacetyl and DMS in the past.
Prosit,
Andy