The aim of this work was to select strains of Aspergillus, niger for tannas
e, production Growth of colonies in plates with tannic acid-containing medi
um indicated their ability to synthesize tannase. Tannase activity was also
measured in solid-state fermentation. A. niger 11T25A5 was the best tannas
e. producer (67.5 U.g(-1)/72 hours of fermentation).