@Miguel : Kan du vise til noe litteratur som sier at det er et problem å karbonere uten å tilsette "aktiv" gjær? Jeg har hatt trøbbel med karbonering bare en eneste gang, og det var med en belgisk golden ale som jeg nok lot stå for lenge - og som holdt godt over 9%. Gjæringsprosessen hadde nok ikke vært den sunneste, heller. Ølet ble i alle fall ikke godt.
I "Yeast" står følgende (s.116): Use the smallest amount of yeast that will achieve carbonation.The greater the amount of yeast, the greater the eventual autolysis flavors. The same goes for yeast health.If you had a troublesome primary fermentation, or there is some reason to doubt the health of the yeast at the end of fermentation, then you will want to add fresh yeast at bottling time.
... => s.117 Homebrewed beer, if you do not filter it, usually has more than enough yeast left in suspension (1 million cells per milliliter (som White mener er det som trengs) can look clear) to carbonate the beer. If the beeer sat for a month or more before bottling, or if the brewer added a lot of post-fermentation fining, it may warrant some additional yeast at bottling. However, in most cases,as long as the yeast health is good, simply adding some sugar at bottling time should be enough to carbonate the beer."