Dry brewing yeast Koln - 11g

Description

LalBrew Köln is ideal for brewing traditional Kölsch-style beers and other neutral ales.  The neutral character of this strain accentuates delicate hop aromas while imparting subtle fruity esters.  Through expression of a beta-glucosidase enzyme LalBrew Köln can promote hop biotransformation and accentuate hop flavor and aroma. Colder fermentations will be more neutral in character, while warmer fermentations will have more fruit-forward ester profile.

Brewing properties:

In Lallemand’s Standard Conditions Wort at 20°C LalBrew Köln yeast exhibits:

• Fermentation that can be completed in 7 days, a bit slower than most ale strains. This is perfectly characteristic of this strain.
• Medium to High Attenuation and Medium Flocculation
• Neutral to slightly fruity and estery flavor and aroma
• The optimal temperature range for LalBrew® Köln yeast when producing traditional styles is 12 – 20°C
• Lag phase can be longer compared to other ale strains, ranging from 24-36 hours

Fermentation rate, fermentation time and degree of attenuation are dependent on inoculation density, yeast handling, fermentation temperature and nutritional quality of the wort.

Dosage:

• 100 g/hl to 100 g/hl

Pitching instructions:

Rehydration of Köln in sterile water is recommended prior to pitching into wort in order to reduce stress on the cell as it transitions from dry to liquid form. For many fermentations, this stress is not significant enough to affect fermentation performance and flavor, so good results may also be achieved when pitching dry yeast directly into wort. We highly recommend rehydration in harsher fermentation conditions such as high gravity or sour wort where the added stress of dry-pitching is more likely to have a greater impact on the finished beer.

Rehydration guidelines are quite simple and present a much lower risk of contamination than a starter, which is unnecessary when using the recommended pitch rate of dried active yeast.

Sprinkle the yeast on the surface of 10 times its weight in clean, sterilized water at 30-35°C. Do not use wort, or distilled or reverse osmosis water, as loss in viability may result. Stir gently, leave undisturbed for 15 minutes, then stir to suspend yeast completely. Leave it to rest for 5 more minutes at 30-35°C. Without delay, adjust the temperature to that of the wort by mixing aliquots of wort with the rehydrated yeast. Wort should be added in 5 minute intervals and taking care not to lower the temperature by more than 10°C at a time. Temperature shock of >10°C will cause formation of petite mutants leading to extended or incomplete fermentation and possible formation of undesirable flavors. Do not allow attemperation to be carried out by natural heat loss. This will take too long and could result in loss of viability or vitality.

Inoculate without delay into cooled wort in the fermenter. Köln yeast has been conditioned to survive rehydration. The yeast contains an adequate reserve of carbohydrates and unsaturated fatty acids to achieve active growth. It is unnecessary to aerate wort upon first use.

Storage – store in cool and dry conditions.