Selection of yeast strain producing acetic acid

DOI

http://dx.doi.org/10.22573/spg.ijals.017.s12200082

AUTHOR AFFILIATION

Laboratory of Biotechnology, Environment and Quality, Faculty of Sciences BP 133, 14000 Kenitra Morocco.

ABSTRACT

A yeast strain E2 was purified from traditional yeast, and retained for its strongly acidifying, fermentative and saccharolytic power. In fact, this strain produces a high concentration of acetic acid 105.85 mg / L revealed by using the H.P.L.C DAD technique during its growth in semi synthetic medium containing sucrose at 5 g /l as only carbon source. The pH of the culture medium increases from 5.58 to 2.76 after 24 hours of culture and to 2.48 after 48 hours of incubation. The initial biomass (D.Oi) increases from the value 0.659 to 5.36 after 24h and to 8.38 after 48h under the same conditions. A yeast strain E2 was purified from traditional yeast, and retained for its strongly acidifying, fermentative and saccharolytic power. In fact, this strain produces a high concentration of acetic acid 105.85 mg / L revealed by using the H.P.L.C DAD technique during its growth in semi synthetic medium containing sucrose at 5 g /l as only carbon source. The pH of the culture medium increases from 5.58 to 2.76 after 24 hours of culture and to 2.48 after 48 hours of incubation. The initial biomass (D.Oi) increases from the value 0.659 to 5.36 after 24h and to 8.38 after 48h under the same conditions.