The culprits” of spoiling beer, do you know?

Besides the lack of experience brewing beer, the “culprit” of beer spoiling sometimes comes from basic mistakes that homebrewers can easily fix. ABV Beer Shop will bring some small but extremely useful information so that anyone can successfully brew delicious, quality batches of beer!

The light

The humulone compound in hops when exposed to sunlight, under the influence of ultraviolet rays will produce a toxic chemical reaction that causes degradation not only making beer perishable, creating off-flavors but also harmful to the health. Therefore, beer storage and preservation areas need to be shady. Homebrewers should also use a dark bottle of extract such as brown or dark green to limit the effects of sunlight.

Fermentation temperature

Temperature during fermentation is an extremely important factor in determining the success or failure of a batch of beer. This temperature should be consistent with the yeast you use for your beer and should remain constant throughout the fermentation period. There are several advanced solutions for temperature control using a refrigerator with a thermostat or a fermenter with a built-in cooling function.

Storage temperatures

Storage temperature largely affects the quality of the finished product. If there is a problem in the storage of beer, the beer may not spoil but the quality may not be as good as expected. Beer can completely be stored at room temperature if the yeast used to brew beer works properly in the temperature range from 18 to 24 degrees Celsius. Homebrewers take care not to suddenly change the beer storage temperature and storing beer too cold can also cause beer to deteriorate.


When newly added to the wort, yeast needs oxygen for proper growth and fermentation. However, once the yeast has had enough oxygen, homebrewers should try to minimize the exposure of oxygen to the wort as much as possible. Because beer when fermented is exposed to air, it can promote some organisms that spoil beer to create undesirable odors such as paper smell, carton smell, vinegar smell…

Brewing equipments are not clean 

All equipment for brewing beer must be cleaned and disinfected. Otherwise, the dirt from the surface of the utensils can come into contact with the wort. It will produce bacterial infections that cause spoilage of beer, beer mold, sour beer or make the finished product taste unsatisfactory.

If you are learning about craft beer or want to try making your delicious beer, contact ABV Beer Shop – a trusted destination for homebrewers!

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