Skal sette en imp. stout med OG oppimot 1.100. Leser i White og Zainasheffs "Yeast" følgende om oksygenering av så konsentrert vørter:
"If it is a very high-gravity wort, more than 1.092, you must aerate with pure oxygen, as air will not provide a high enough level of dissolved oxygen. Unfortunately, that still might not be enough for beers higher than 1.083. For high-gravity beers, adding a second dose of oxygen between 12 and 18 hours can help fermentation speed and attenuation. The yeast takes up this oxygen and uses it for cell membrane maintenance and the production of some needed intermediary compounds." Osv. Side 83-84.
Så til spørsmålet: Er det noen her som har erfaring med en slik andre oksygen-runde i heftige øl? Eller veit om dette er vanlig praksis i proffe bryggerier, f.eks.?
"If it is a very high-gravity wort, more than 1.092, you must aerate with pure oxygen, as air will not provide a high enough level of dissolved oxygen. Unfortunately, that still might not be enough for beers higher than 1.083. For high-gravity beers, adding a second dose of oxygen between 12 and 18 hours can help fermentation speed and attenuation. The yeast takes up this oxygen and uses it for cell membrane maintenance and the production of some needed intermediary compounds." Osv. Side 83-84.
Så til spørsmålet: Er det noen her som har erfaring med en slik andre oksygen-runde i heftige øl? Eller veit om dette er vanlig praksis i proffe bryggerier, f.eks.?