Hvor mye får man inn v-risting/visp etc når vørteren er 10 grader kald?
Oksygen mettning ved 10 grader?
- Trådstarter DenNøgneRøv
- Startdato
Har ikke tallene foran meg, men er ikke det maksimalt mellom 4 og 8 ppm om man ikke bruker ren oksygen og beluftningssten?
Fra sciencebrewer:
In reality, as homebrewers it is very difficult not to introduce O2 once the wort is cooled. Simply transferring the cold wort into a carboy (without splashing) will add some amount of oxygen for the yeast to use, however this is far from ideal. Yeast need greater than 8 parts per million (ppm) to adequately ferment a batch of beer. Here are some numbers on different methods (keep in mind that O2 dissolves less in higher gravity wort) on an average batch of homebrew (5 gallons, 1.050 – 1.070):
Fra sciencebrewer:
In reality, as homebrewers it is very difficult not to introduce O2 once the wort is cooled. Simply transferring the cold wort into a carboy (without splashing) will add some amount of oxygen for the yeast to use, however this is far from ideal. Yeast need greater than 8 parts per million (ppm) to adequately ferment a batch of beer. Here are some numbers on different methods (keep in mind that O2 dissolves less in higher gravity wort) on an average batch of homebrew (5 gallons, 1.050 – 1.070):
- Shaking: 2 ppm
- Aquarium pump: maximum of 8 ppm
- 30 seconds pure O2: 5 ppm
- 60 seconds pure O2: 8-10 ppm
- 2 minutes pure O2: greater than 14 ppm
Tja... mellom 2 og 8 ppm virker å være max om man ikke har ren oksygen og beluftningssten...
Fra beersmith forumet :
The latest info I have for O2 is:
splashing=4 ppm
'lots' of vigorous shaking= 8ppm
pump & stone = 8ppm
They say 8 ppm is the maximum you can get using air of any method even with a pump and stone and times of forever.
They go on to say that extended pump & stone aeration will result in loss of head formation & retention.
overoxygentation will get you acetaldehyde and fusels
underoxygenation will get cause lack of and slow attenuation, off-flavors, and decreased health for re-use.
Da huska jeg ikke helt feil...
Fra beersmith forumet :
The latest info I have for O2 is:
splashing=4 ppm
'lots' of vigorous shaking= 8ppm
pump & stone = 8ppm
They say 8 ppm is the maximum you can get using air of any method even with a pump and stone and times of forever.
They go on to say that extended pump & stone aeration will result in loss of head formation & retention.
overoxygentation will get you acetaldehyde and fusels
underoxygenation will get cause lack of and slow attenuation, off-flavors, and decreased health for re-use.
Da huska jeg ikke helt feil...
Takker
jeg trodde metningen ble høyere ved lavere temp men stod ikke noe om det der
jeg trodde metningen ble høyere ved lavere temp men stod ikke noe om det der
SvErD
Norbrygg-medlem
Maks metning ved bruk av luft i 12° Plato vørter
7,4% ved 20° C
9,3% ved 10° C
https://www.ibd.org.uk/cms/file/308
7,4% ved 20° C
9,3% ved 10° C
https://www.ibd.org.uk/cms/file/308
