2.2. Materials and media
Liquid cheese whey used for all fermentation experiments was
obtained from the regional dairy industry ‘‘Agricultural Cooperative
Union of Kalavryta’’ (Kalavryta, Greece). It remained after the
production of feta cheese and after removal of whey proteins lactalbumins
and lactoglobulins and contained about (% w/w) 5 of lactose,
0.8 of proteins, while its pH value was 6.5. The BSG and MSR
were obtained from the Athenian Brewery S.A. and used as cells
supports. The BSG contained about (% w/w on dry matter) 21.6 of
crude protein, 6.8 of fats, 17 of cellulose, 22 of lignin, 28 of non-cellulosic
polysaccharides and 4.7 of ash. The MSR consist of about
(% w/w on dry matter) 36.2 protein contents, 12.1 cellulose, 18.4
fibers, 13.3 carbohydrates, 3.7 glucose, 1.0 polyphenols, 0.6 fats
and 3.0 ash. The compositions of BSG, MSR and whey provided
by the manufacturers.