Following our previous works, where the production of volatile
bio-esters by a commercial wine yeast strain (Vitilevure MT) was
studied in submerged fermentation (SmF) using OP complemented
with a nutritive medium containing glucose, yeast extract and
salts [8] or OP hydrolysate [7], in this work the potential of such
a waste as a substrate for flavour-active compounds production
by SSF using the same microorganism was investigated. In such a
case, the SSF would be preferred to SmF if it could provide several
advantages such as higher productivity and lower pre-treatment,
downstream processing and waste disposal costs. Since elimination
of autoclave sterilization is expected to reduce the overall cost
of the final products, the effect of non-sterile conditions on process
parameters such as cell viability and nutrient assimilation was
also assessed. Gas chromatography (GC–MS, GC–FID) analysis was
employed to monitor changes in the compositio