08/07/2024
A must read for Brewer’s and Distillers’
Alright folks, we need to chat.
This week we have had (literal) tears, tantrums and total failures presenting in store, so we want to address the common denominator that is creating so much angst now that the weather has turned, and introduce some of you to a crucial tool every brewer should have in their arsenal: the HYDROMETER.
When it comes to fermenting our brews, especially during cooler weather, visual signs of fermentation can be misleading. The colder temperatures tend to slow down the activity of yeast, making it harder to judge fermentation progress by just looking at bubbles or krausen formation.
This is where the hydrometer not only comes in handy, but as Greg will tell you, it’s critical. By measuring specific gravity before and during fermentation, we can accurately track how much sugar has been converted into alcohol. This not only ensures that we hit our target alcohol content but also helps prevent under-fermentation at this time of year.
What is the impact of under fermentation?
Under-fermented beer or spirit washes result in lower alcohol content, altered flavour profiles, reduced yield, inconsistency in production, and potentially increased costs. All of which lead to tears and tantrums. Why?
🍺 Alcohol Content & Flavour:
The primary goal of fermentation is to convert sugars into alcohol. If fermentation is incomplete (under-fermented), the final alcohol content of the beer or spirit will be lower than intended. This directly affects the flavour profile, as the balance of sweetness and alcohol will be skewed. In the case of spirits, under-fermentation can result in a harsher taste due to higher concentrations undesirable compounds.
🍺 Yield Efficiency:
Under-fermentation means that not all available sugars have been converted into alcohol. This lowers the yield of the final product. In distilling, under-fermented washes result in less alcohol available to be distilled, thereby reducing the yield of the spirit.
🍺 Consistency & Quality:
Consistency is crucial in brewing and distilling. Under-fermentation introduces variability in the final product because each batch may have different alcohol content and flavour characteristics.
🍺 Production Costs:
Under-fermentation can lead to increased production costs. It may require additional time and resources to correct the fermentation or to blend batches to achieve the desired quality and consistency.
By monitoring gravity readings, you can adjust yeast pitching rates, fermentation temperatures, or even use different yeast strains better suited to lower temperatures. This level of control not only improves the consistency of your brews but also opens up opportunities for experimenting with different flavours and styles.
So, regardless of what you’re brewing, remember that a hydrometer is your best friend. It's not just about ensuring the alcohol content—it's also about honing your craft and mastering the art of fermentation.
Cheers to precision brewing and delicious results! 🍻
Better Brewer
