How to deal with bubbles in coffee Why do fresh coffee beans need exhaust Coffee spoilage reasons
What to do when there are bubbles in the coffee? why do fresh coffee beans need exhaust coffee? why does the coffee go bad?
When bubbles appear in coffee, the bubbles or bubbles are formed by carbon dioxide released from coffee grounds. It is called coffee flowers. The gas is trapped during baking and then released when water is added.
It doesn't affect the taste of coffee, it doesn't mean anything bad, it actually means that your coffee is delicious and fresh.
A large number of bubbles that greet you in a cup of coffee come from carbon dioxide, which forms during roasting and is trapped in coffee beans. Over time, coffee beans release gas, but the degassing rate is accelerated when the beans are ground and exposed to hot water during brewing.
In fact, those coffee bubbles and soda bubbles have a common source: carbon dioxide.
As you might imagine, carbon dioxide is formed during coffee roasting. Calories cause amino acids and carbohydrates in coffee beans to react (through a process known chemically as Strecker degradation and Maillard reaction) to produce a variety of aromas. Baking also causes the thermochemical decomposition of carbohydrates (also known as pyrolysis).
CO2 being trapped in freshly roasted coffee beans has two consequences:
When it escapes (or degassed) from the coffee bean, it forms a barrier against oxygen, which is the cause of coffee deterioration (so why so many containers on the coffee storage market have sealed or other functions to prevent air from entering and allow degassing).
two。 Degassing-which occurs quickly in the first few days after baking and then continues to escape within weeks-causes many packaging problems, such as carbon dioxide accumulation and explosion. therefore, if you put coffee beans in a bag designed to prevent air entry, the bag needs to contain an one-way valve, which is the main reason why most coffee roasters use a single exhaust valve.
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