The good thing for us is that the worst-tasting of those compounds are typically the last things to dissolve. When the moisture levels are low enough the coffee is moved into a dryer.
The first is processing at the country of origin, the second is roasting, and the third and final event is brewing. The remaining mucilage dries into the bean, changing the flavor profile considerably.
An Arabica tree will reliably produce harvests for 10 to 15 years. Finally, defective beans are removed either by hand or by machinery.
In reality, these are choppers, not grinders. Grinding Going from perfectly roasted bean to flavorful coffee requires an intermediary step: grinding the beans.