Today, one way degassing valve wants to talk with you about roasting the raw coffee bean without screening, no matter how good the technology and you cannot brew a cup of delicious coffee. Because the raw coffee beans are often mixed with impurities and bad beans, the bad beans we always called defective beans. So this little is very important, and do you know how many types of defective beans?
Now let me introduce the types of defective beans for you, please see below:
1. The whole black bean, feature: the whole or partial raw beans appear black opacity. Forming reasons: the blacken problem is caused by excessive fermentation, such as fermented or smelly fermented, stained with the smell of dust, acid rot.
2. All-acid beans, local acid beans, feature: the coffee bean shows yellow-brown or reddish brown was identified as acid beans. Forming reason: the acid beans are in the process of harvesting and processing, beans produce fermented yeast contamination by bacteria.
3. Moldy beans, feature: the preliminary stage of moldy beans has yellow-brown or reddish brown point, and this is caused by bacteria erosion. Forming reasons: the moldy beans usually have mold spore. After harvest and be keeping at a specific temperature and humidity, it will make moulds grow and infected beans.