3. Results and discussion
3.1. Cheese whey fermentation
In the first fermentation test the conversion yield from the soluble
substrate (FCW1) carbon to organic acids carbon was equal to
0.4 mmole OA-C mmole SS-C1
; in terms of composition, the fermented
FCW1 contained lactic acid, acetic acid and butyric acid
in the proportion of 58/16/26 (%, CODOA basis) (Table 1).
In the second fermentation test a conversion yield of 0.6 mmole
OA-C mmole SS-C1 was obtained, and the fermented slurry
(FCW2) was composed of acetic acid, propionic acid, butyric acid, lactic
acid and valeric acid, in the proportion of 58/19/13/6/4 (% CODOA).