The inhibition in whey fermentation using free cells
(Golfinopoulos et al., 2011) by Ca2+ ions was eliminated, maybe
due to cluster formation of Ca2+ ions with cellulose which leaves
the liquid medium. Indeed, using the atomic adsorption spectroscopy
(AAS) method, in the present work was found that the concentration
of calcium in the whey was decreased about 34%
during fermentation by BSG biocatalyst, whereas concentrations
of magnesium, iron and zinc were remained almost constant.