I have experimented with the latest batch of bitter. My theories about the cause of sediment are:
- it is related to the amount of sugar in some way
- the sediment needs (more) time to settle out
I've tried to have the second fermentation in a barrel before, but the results were similar to before. This time a few things were different (not very scientific, I know) - though only one was deliberate:
- the original mixture was a little less diluted (higher O.G.)
- the primary brew was left for longer (2 weeks) before syphoning off
- less sugar was used for the second fermentation
- the second fermentation was left for longer (1 week - in a barrel
The result is very pleasing. I had intended to leave the second fermentation for an extra day or two. In the end, it was left for a week. After two days the pressure dropped as usual. Firstly, there was less sediment in the barrel; secondly, there was less sediment in the bottles.
A few weeks in after bottling, the beer is gaining fizz, and there is very little sediment. The beer is, however, _really_ bitter! It's also a bit stronger at 4.4% compared with about 3.8% before. (I put this down to the higher O.G.) It's very tasty, and I'm pleased with it, but it might not be to everyone's liking.
Next time, more sugar ...