Experiments were carried out to study the production of aroma compounds fro
m coffee husk by a fungal culture of C. fimbriata in solid state fermentati
on. Hot water treated coffee husk seemed to be useful substrate for aroma p
roduction in comparison to whole coffee husk or its water extract. Raw data
were integrated in order to calculate the total volatiles (TV) accumulated
during the fermentation using the Gompertz model. Glucose addition between
20-35% increased significantly the yields of aroma compounds. Supplementat
ion of leucine further improved the TV production significantly (about 58%)
, specially the esters. When soybean oil was added, TV production was simil
ar to the control, showing that the fungus was not able to use soybean oil
for its primary metabolism, nor it acted as precursor for the synthesis of
methyl ketones as reported for other fungi. Addition of saline solution dra
stically decreased the volatile production. Under optimized conditions, a t
otal of 13 compounds were produced which included alcohols (2), aldehyde (1
), ketones (2) and esters (8). Ethyl acetate was the prominent compound, fo
llowed by ethanol.