All the three lactic bacterial strains compared in Table 11
are homofermentative. Sugar is only for growth and lactate
production. Bacillus strains are thermophilic (contrary to
Lactobacillus) and are adapted for industrial production;
moreover, high disparities exist in the same species of B.
coagulans and the fermentation conditions. Heriban et al.11
demonstrated the key role of fructophosphokinase and
pyruvate kinase in the glycolic flux of cells. A high
concentration of yeast extract (15 g l21) and salt supplementation
considerably increases biomass concentration,15
but the specific production rate was fourfold less efficient
than B. coagulans TB/04.