Protmemb protein interacting with the membrane (M)
Protp protein in the permeate (M)
Protr protein in the retentate (M)
Pv volumetric productivity (MT−^1 )
Q flow rate (L^3 T−^1 )
Q 0 feed flow rate (L^3 T−^1 )
Q 1 flow rate at the module entrance (L^3 T−^1 )
QP permeate flow rate (L^3 T−^1 )
Qr recirculation flow rate (L^3 T−^1 )
R recirculation flow rate ratio (dimensionless)
Re Reynolds number (dimensionless)
Rmemb membrane resistance (ML−^2 T−^1 )
Rprot resistance of protein gel on the membrane (ML−^2 T−^1 )
Rtotal sum of resistances (ML−^2 T−^1 )
S substrate concentration (ML−^3 )
S 0 initial substrate concentration (ML−^3 )
S 1 substrate concentration at the module entrance (ML−^3 )
Sn substrate concentration after each single-pass (ML−^3 )
SP permeate substrate concentration (ML−^3 )
Sr recirculated substrate concentration (ML−^3 )
t time (T)
t1/2 half-life time of biocatalyst (T)
tf final time of operation during a deactivation process (T)
ti initial time of operation during a deactivation process (T)
u linear velocity or cross flow velocity (LT−^1 )
v velocity or rate of reaction (ML−^3 T−^1 )
V volume (L^3 )
Vmax maximum enzyme velocity (ML−^3 T−^1 )
vp pore volume (L^3 )
VP volume of a membrane pore (L^3 )
Vtotal total reaction volume (L^3 )
W 0 water to surfactant molar ratio (dimensionless)
X conversion degree (dimensionless)
X 0 feed conversion degree (dimensionless)
X 1 conversion degree at module entrance (dimensionless)
Xe equilibrium conversion degree orsteady state conversionReversed micellar bioreaction systems 229