I've been conducting an experiment in recent weeks using shop bought apple juice and different yeast strains (because I already fermented all my 2018 fresh harvest apples using Lalvin EC-1118, which I know produces good results.)
I've put down four small 8 litre batches using the following yeasts:
- Lallemand CBC-1
- Safbrew E-256
- Safbrew T-58
- Safale S-04
All yeasts are dried, sachet based. All yeasts were re-hydrated in 200ml of water for 15 minutes prior to pitching in the most.
I was really aiming for differentiation on taste. Unfortunately I chose badly when it came the shop juice because it's cloudy, and I haven't specifically added Pectolase to clear it (not even sure if that'd work with pasteurised shop bought juice), which means there will be no differentiation by clarity.
Juice was Lidl Solevita Apfelsaft.
Starting gravity was 1050 and acidity pretty much exactly 5.00, as near as I could measure.
All batches were fermented in my cellar which has a pretty constant temperature of between 18-19C at this time of year. All batches were fermented in glass demijohns, covered in a t-shirt to keep out light and provide a small extra layer of insulation. All batches had a 14 day first ferment before bottling.
The CBC-1 and E-256 batches were bottled a week ago, but today I bottled the T-58 and S-04 batches.
The CBC-1 and E-256 batches both attenuated all the way down to 1000, which was expected as both yeasts have a very high alcohol tolerance. I originally bought several sachets of these yeasts to use in meads. Neither yeast produced much krausen, although some was evident with both. Both yeasts appeared to finish fermentation quite quickly, perhaps within 4 days, but certainly within seven.
The T-58 and S-04 was bottled today. The T-58 attenuated down to 1002 and the S-04 down to 1004. The T-58 produced no krausen at all that I could see. The S-04 produced a very light krausen within the first 24 hours, which then disappeared quickly. Both yeasts seemed quite slow to ferment and new CO2 bubbles were appearing well after day seven.
The T-58 had a very definite rotten egg aroma. However, the sample tasted fine, although slightly acidic.
The S-04 had a more fruity aroma and the sample tasted much less acidic than the T-58.
Also, the S-04 hard a lovely hard yeast lees in the bottle of the demijohn, which wasn't really disturbed very much during siphoning. In contrast the T-58 lees were still quite fluid, were stirred up a lot by siphoning and resulted in more cider left behind as it became mixed with the lees. Picture is of the S-04 lees.
Tasting starts in a couple of weeks......