In summary, it could be said that the UHT treatment of coffee
brews at 120 °C for 2 s allows us to obtain a microbiologically safe and
good sensory valued product, with hardly changes either its volatiles
or non-volatiles compounds. However, the UHT treatment applied in
this study seems to be useful to preserve somehow the sensory quality
of stored coffee brews. Thus, although the UHT treated coffee brew is
considered more plain in terms of sensory quality, this treatment
keeps longer the typical acidity of the brews, delaying and softening
the pH decrease and the development of sourness, which is one of the
main causes for the rejection of stored coffee brews (Pérez-Martínez
et al., 2008a). In view of all the results, it could be concluded that the
application of an UHT treatment is effective to extend the shelf-life
(up to 60 days) of stored coffee brews while assuring their
microbiological stability and keeping its chemical characteristics.