On a glucose medium, the growth of an organism is characterized by the following Monod model and stoichiometric parameters μ_m = 0.3 h^-1, K_s =0.05 g.l^-1 and Y_xs = 0.3 g.g^-1 When this organism is grown in a 2 litre continuous on a medium containing 10 g.l^-1 of glucose added at 1 l.h^-1, the steady state concentration of biomass in the reactor will be