The batch biosorption rate for the system based on an intraparticle diffusion rate parameter derived from the plots of Hg II) sorbed versus the square root of time indicated that the adsorption mechanism was predominantly intraparticle diffusion but there was also a dependence on pore size as the Hg II) diffuses through macro-, meson-, and microspores.
With fixed optimal values of the cell and substrate feed-batch concentrations, feed-batch flow rate strategies of two types were performed: (1) first, second, and third order polinomial functions with six hours samples were used, and (2) with independent values with six and twelve hours samples.
30 sets of batch flotation rate tests were executed at different conditions of pulp concentration (X1), frother dosage (X2), flow rate of circulation pulp (X3) and froth depth (X4).
When the number of low-priority customers in the system reaches the level (m_{1}), its (batch) arrival rate is forced to reduce from (lambda _{L,j}) to the guarantee value (lambda _{mathrm{LP}}).
Process productivity optimization was initially made with relation to cell initial concentration, fed-batch flow rate and substrate fed-batch concentration.
The production process optimization has been performed through the manipulation of the initial cell and the substrate fed-batch concentrations besides the fed-batch flow rate strategy.
We first studied the effects of different glucose feeding strategies, including exponential fed-batch culture, pulse fed-batch culture, constant rate fed-batch culture, and glucose control (5 g/L, 10 g/L, 15 g/L) fed-batch culture, on cell growth and GlcNAc synthesis.
As a consequence, the fed-batch addition rate of the alkaline substrate to neutralize the produced lactic acid was low (results not shown).
The number of mares inseminated per stallion was small, the straws were not from the same batch, foaling rates were collected during several years – fertility of stallions can vary between years and decrease with age.
