(a) (b)
Figure 4. Experimental (solid line) and simulated (discrete
symbols) profiles of (a) permeate flux and (b) permeate concentration
versus operation time with membrane pore size of 10 nm and membrane
porosity of 0.8. Substrate concentration: 50 g/L, enzyme concentration:
0.05 g/L, agitation speed: 160 rpm, and feeding mode: water feeding.