Bioprocesses modeling of acidolysis and redoxolysis activities of ferric and ferrous iron by Saccharomyces cerevisiae and Acetobacter aceti

Abstract

The acidolysis and redoxolysis reactions regulate the oxidation and reduction of ferric [Fe^(+3) ] and ferrous iron [Fe^(+2) ] which are vital for living organisms. Bioprocesses modeling of the acidolysis along with redoxolysis activities of ferric to ferrous iron [(Fe^(+3))/(Fe^(+2) )] by Saccharomyces cerevisiae and Acetobacter aceti was studied. The bioprocess experiments were carried out at different temperatures of 25oC, 30oC and 35oC for eight weeks. Glucose, ascorbic acid, acetic acid, ethyl alcohol and vinegar were used in incubation media as substrate and acidic purposes. The [(Fe^(+3))/(Fe^(+2) )] ratios were determined from pH and Nernst equation, and the modeling of the bioprocesses was accomplished by employing the specific iron utilization rate from Michaelis-Menten equation. The oxidation result of ions was found noticeable at 35oC in the microbial environment.