In the effect of humic acid (HA), and the roles of crofiltration (MF), PES (polyethersulfone) beads adsorption, and photo-oxidation, Because membrane fouling
increased dramatically as decreasing HA, Rf increased and J180 decreased, and finally VT was the highest at 2 mg/L HA. Turbidity and Humic acid treatment efficiency are
almost same without reference to humic acid oncentration. Hybrid water treatment process using the TiO2 photocatalytic coating PP beads of UF ceramic membrane in this research team.Treatment, efficiency of turbidity and humic acid of the water back-flushign was tended to decrease the concentration of humic acid increases. The
reason is that, It is determined that using the TiO2 photocatalytic coating PP beads ultrafiltration membrane, contaminants are processed by different mechanisms.
In the experiment to investigate the roles of photo-oxidation and adsorption at humic acid 4 mg/L and 6 mg/L. In both conditions, Rf was the lowest and VT was the highest in MF+TiO2+UV process. The average treatment efficiencies of turbidity and humic acid were the highest in MF+TiO2+UV process, too. As decreasing FT and increasing BT, Rf decreased and J increased, and finally the maximum VT could be acquired at FT 10 min and BT 30 sec. In FT effect experiment, treatment efficiencies of turbidity and humic acid were the highest at NBF (no back-flushing) because of dramatic membrane fouling. As result of BT effect, the
treatment efficiencies were the maximum at BT 30 sec, which was different with theFT result. Because the photocatalyst beads could be cleaned effectively as decreasing FT and increasing BT, turbidity treatment efficiency increased a little as decreasing FT, and increasing BT. Also humic acid treatment efficiency increased as decreasing FT, and increasing BT. The optimal condition, where the treatment efficiencies and VT
were the maximum, should be FT 10 min and BT 30 sec in our experimental range. As increasing pH, Rf decreased and J increased. finally the maximum VT could be
acquired at pH 9. Treatment efficiencies of turbidity was almost same regaldless of the pH. Treatment efficiencies of humic acid was decreased with increasing pH. In Oxygen
back-flushing effect experiment, as decreasing FT, Rf decreased and J increased, and finally the maximum VT could be acquired at FT 6 min. Treatment efficiencies of
turbidity and humic acid were the highest at NBF, because of dramatic memebrane fouling. Except NBF, treatment efficiencies of turbidity and humic acid were increased
as decreasing FT. Comparing the results of nitrogen and oxygen back-flushing, Rf and J, VT revealed the similar trend in both conditions. Also, saturated oxygen was
significantly improved processing efficiency of humic acid.
In photocatalyst loaded PES beads concentration 30 g/L, Rf,180 has been shown minimum value. J180 was the maximum at PES beads concentration 30 g/L and 20 g/L.
Except for the condition 50 g/L, VT was the maximum value from the PES beads concentration 40 g/L. Therefore, in this experiment, optimal condition is determined PES
beads concentration 40 g/L. As PES beads concentration decreasing, treatment efficiency of turbidity and humic acid were reduced. Treatment efficiency of turbidity and humic
acid were the maximum at 50 g/L of PES beads concentration.