Beer brewing may seem simple, but it requires rigorous craftsmanship. Whether it is large-scale industrial production or the increasingly popular craft beer in recent years, their brewing processes are basically the same. This article will introduce the complete beer brewing process for you.
I. First, Understand the Four Basic Raw Materials of Beer
- Malt: Usually made by germinating and drying barley, it is the main source of sugar and flavor.
- Water: The most abundant component in beer; different water qualities significantly affect the taste.
- Hops: Impart bitterness and aroma to beer, and also play a preservative role.
- Yeast: Converts sugar into alcohol and carbon dioxide, and is the core of fermentation.
II. The Core Process of Beer Brewing
- Malt MillingThe malt is moderately milled to expose the internal starch while keeping the husk intact for subsequent filtration. This step directly affects the mashing efficiency.
- MashingThe milled malt is mixed with hot water and heated within a specific temperature range. Enzymes in the malt break down starch into fermentable sugars (such as maltose).
- Common mashing temperature: 62–72℃
- Mashing time: 60–90 minutesDifferent combinations of temperature and time will affect the body and sweetness of the beer.
- LauteringSeparate the mashed wort from the spent grain. The spent grain forms a natural filter layer, allowing the clear wort to flow out.
- BoilingThe wort is usually boiled for 60–90 minutes, with hops added at different times:
- Early addition: Provides bitterness
- Mid-term addition: Enhances flavor
- Late addition: Boosts aromaBoiling also serves to sterilize, volatilize off-flavor substances, and stabilize the composition of the wort.
- CoolingThe boiled wort must be quickly cooled to the temperature suitable for yeast activity:
- Ale: 18–22℃
- Lager: 8–12℃Rapid cooling helps reduce the risk of contamination by unwanted bacteria.
- FermentationYeast is added to the cooled wort to start the fermentation stage. Yeast converts sugar into alcohol and carbon dioxide, and produces flavor compounds at the same time.
- Primary fermentation time: 3–14 days
- Temperature control is the key to stable flavor
- ConditioningAfter fermentation is completed, the beer enters the conditioning period to mellow the taste and precipitate excess impurities. Lager usually requires a longer period of low-temperature conditioning.
- Filtration and PackagingDepending on the style requirements, the beer can be filtered or unfiltered (with yeast retained). Then it is filled into containers:
- Bottles/cans/kegsSome beers undergo secondary fermentation after packaging to increase natural carbonation.
III. Process Differences Between Different Beer Styles
Although the basic process is consistent, different beer styles are adjusted in the following aspects:
- Malt ratio
- Hop varieties and addition methods
- Yeast type (top-fermenting / bottom-fermenting)
- Fermentation temperature and time
It is these differences that result in the rich and diverse flavors of beer.
From a single barley grain to a glass of beer, every step is crucial. If you are interested in brewing beer, a thorough understanding of these processes will be your first step.
Our company, Tonsen, can provide kombucha brewing equipment. Whether it is small-batch brewing for start-up workshops or industrialized production for large beverage factories, we can customize solutions according to your needs, and provide one-stop services including technical guidance, installation and commissioning, as well as after-sales operation and maintenance. Achieve efficient fermentation and worry-free production. Welcome to consult for equipment parameters and quotations!