In order to experimentally analyze the permeate performance of a membrane synthesized by a pore-filling technique, microfiltration experiments are conducted using pretreated wastewater having high alkality. The conventional cake filtration theory was also used in order to determine the permeability and the resistance of the cake-layer in the membrane. From the experimental results, the hydraulic permeability by diffusive-convective transport was measured as a function of the amount of gellation in the pores, which was enhanced by more than 70% in comparison with the nascent membrane. The transmembrane pressure (TMP) was also reduced by 80% in the newly developed membrane as the ion-exchange capacity increased. The resistance (Rm) in the membrane was reduced by 35% in comparison with the nascent membrane. The gellation of the pore-filled membrane was synthesized by impregnating the pores with a monomer solution, i.e., a crosslinker, followed by polymerization with piperizine. An appreciable enhancement of the permeate flux in the pore-filled membrane was noted using pre-treated wastewater under 10 kgf/cm(2).