Greek Letters
αav average specific filtration resistance of cake layer (m kg-1)
αd average specific filtration resistances of dextran (m kg-1)
αe average specific filtration resistances of enzyme (m kg-1)
γ shear rate (s-1)
δ Stern layer thickness of particle (m)
δc thickness of momentum boundary layer (m)
δm thickness of functional layer (m)
ε cake porosity (-)
εm membrane porosity (-)
εo porosity of the most compact cake layer (-)
ζ zeta potential of particle (V)
κ reciprocal of double layer thickness (m-1)
λ ratio of solute radius to pore radius (-)
λp characteristic wavelength of particle (m)
μ feed viscosity (Pa s)
μmax maximum friction coefficient (-)
ν kinematic viscosity (m2s-1)
ρ fluid density (kg/m3)
ρs particle density (kg/m3)
τ tortuosity (-)
τc shear stress (Pa)
ϕ equilibrium partition coefficient (-)
ω effective volume fraction of enzyme in the cake layer (-)
ωo stirring angular velocity (rad s-1)