The pH values of the mixtures generally decreased during the preparation process of all the beers due to lactic acid production by lactic acid bacteria during fermentation, reaching final values in the range of 3.29–3.82 (Table 2). An increase in lactic acid was recorded as lactic acid bacteria proliferated during lactic acid fermentation and final values of lactic acid in
the beers were in the range of 2.83–4.77 g/l (Table 3). Lactic acid contributes to the characteristic taste of opaque beer and serves as a background for distinguishing other flavours. The pattern of pH and lactic acid recorded is consistent with that reported by other
workers for various cereal fermented beverages [4,7,14].