30 Mar '15, 9pm

Coffee Science Manager @EmmaBladyka explains hydrolysis in the coffee brewing process #AskEmma

Coffee Science Manager @EmmaBladyka explains hydrolysis in the coffee brewing process #AskEmma

I keep hearing about this “hydrolysis” thing that happens during brewing, what is it? Can you explain the science behind hydrolysis? How is it different than extraction? Thanks, Brewed and confused in Baltimore *** Dear brewed and confused, I feel your pain! Brewing is one of the most complex yet under-researched topics in coffee. In our SCAA education, we have always stressed the three “stages” of brewing to be wetting, extraction, and hydrolysis (Lingle 2011). These terms have always seemed mildly scientific but have not yet been well defined and often leave us with more questions than answers. Let’s consider extraction first. As the coffee grounds are wet, gases and volatile compounds are dissolved and lost, and soluble compounds are simultaneously drawn out from the coffee. This primarily occurs in the form of chemical and physical reactions between the coffee and the ...

Full article: http://www.scaa.org/chronicle/2015/03/30/ask-emma-what-is...

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