The results showed that the initial pH of must was a vital factor influencing yeast growth and alcoholic fermentation. ... Among the 4 pH values, all the 3 strains showed adaptation even at pH 2.50; pH 2.75 and 2.50 had more vital effect on yeast growth and fermentation products in contrast with pH 4.50 and 3.00.

How does pH affect fermentation process?

In addition, the pH factor of fermentation solution determines the process of sugar reaction to bioethanol. Fermentation solutions that are very acidic or alkaline can inhibit the fermentation process, thus reducing the amount of bioethanol produced [4].

Does pH change during fermentation?

During fermentation, the pH continues to drop for a variety of reasons. Yeast cells take in ammonium ions (which are strongly basic) and excrete organic acids (including lactic acid). ... As pH decreases with attenuation, drier beers tend to have slightly lower pH values.