Solving the numerical equation needs an assumption of the value of fitting parameters in Equation 3. The fitting parameters are τ and k c which depend on the bead size, initial concentration of heavy metal in the solution, and agitation rate [14, 20].
Carbon nanotubes codeposition was found to reach a maximum and then decrease with carbon nanotubes concentration in the solution, current density and agitation rate.
The influences of electropolishing variables, such as agitation rate, solution temperature, applied potential, electropolishing time, and the volume percentage of perchloric acid in ethanol perchloric acid solutions, on the surface roughness of the industrially pure aluminum sheets Al-10500, 99.5%) are systematically investigated using fractional factorial design (FFD).
In this work, palm oil was chosen as the organic phase to study the oxygen transfer characteristics such as effect of viscosity, gas holdup, and mass transfer coefficient on the xanthan gum solution by varying the agitation rate and aeration rate in a stirred tank bioreactor.
The influences of anodizing variables, such as applied voltage, solution temperature, oxalic acid concentration, agitation rate, and sulfuric acid concentration, on the average pore diameter of AAO were systematically investigated using fractional factorial design (FFD).
The physiochemical conditions such as the type of ionic solutions (liquid diffusion coefficient), bead size, agitation rate, and porosity of beads are effective factors in an adsorption process that can be considered in the nonlinear model while their effects could be investigated in detail [14, 20].
Experiments were carried out to study the effect of viscosity, gas holdup, and k L a on the xanthan solution with different palm oil fractions by varying the agitation rate and aeration rate in a 5 L bench-top bioreactor fitted with twin Rushton turbines.
The fitting parameters (which depend on some effective conditions such as the agitation rate and initial concentration of the solutions [14, 20]) were determined with the calculation of σRMSD between the predicted and experimental data.
This could be seen in the form of enhancement factor as shown in Table 2. Enhancement factor can be defined as the ratio of k L a value in xanthan solution with palm oil, (k L a po to that of pure xanthan solution, (k L a) o both measured at the same aeration and agitation rate.
Two regions with and without agitation effect are distinguished and separated by a minimum agitation rate.
