Effect of self-induced anaerobiosis fermentation (SIAF) in the volatile compounds and sensory quality of coffee.

Specialty coffee has become increasingly consumed in recent years. The growth of the specialty coffee market has also led to a greater appreciation of the unique flavors and characteristics of different coffee species. Coffea arabica (Arabica coffee) and Coffea canephora (Canephora coffee, known internationally as Robusta) are the main species of most significant economic importance worldwide. This study aims to evaluate the use of Meyerozyma guilliermondii in the self-induced anaerobiosis fermentation (SIAF) of Coffea arabica and Coffea canephora. SIAF without inoculation (spontaneous fermentation) and with inoculation of yeast M. guilliermondii was conducted for five days in closed bioreactors. Volatiles and sensory analyses were performed in the roasted coffees. Twenty volatile compounds were identified in Arabica coffee and fifteen in Canephora coffee. The classes found were esters (7), pyrazines (7), ketones (4), alcohols (2), aldehydes (2), phenols (1), and pyrrole (1). Furfuryl alcohol was a significant compound for Arabica coffee, while 4-ethenyl-2-methoxyphenol was notable for Canephora coffee. M. guilliermondii increased significantly (p < 0.05) the score by over 3 points, improved the production of desirable volatile compounds (2-methylpyrazine, 2-ethylpyrazine, furfuryl alcohol, and 5-methylfurfural), enhanced the perception of sweetness and the sensory complexity of Canephora coffee. The SIAF method combined with M. guilliermondii can be a practical approach for improving the sensory quality of the Canephora coffee beverage. Spontaneous fermentation combined with the SIAF method resulted in an Arabica coffee beverage of good quality. [ABSTRACT FROM AUTHOR]