The effects of pH, saturated oxygen, and back-flushing media were investigated in hybrid process of tubularceramic microfiltration and TiO₂ photocatalyst-loaded PES (polyethersulfone) beads for advanced drinking water treatment,and compared results of water, nitrogen, or oxygen back-flushing in the viewpoints of membrane fouling resistance (R_f),permeate flux (J) and total treated water (V_T). R_f decreased, and J and V_T increased as decreasing pH. Turbidity treatmentefficiencies were similar at water or nitrogen back-flushing independent of pH, but DOM (dissolved organic matter) treatmentefficiency did not have a trend at water back-flushing. R_f at NBF (no back-flushing) with SO (saturated oxygen) wasthe lower than that at NBF without SO. Also, the DOM treatment efficiency at NBF with SO was the lower than that atNBF without SO. It happened because OH radicals produced by reaction of SO and photocatalyst could dilute with waterinside the module. The DOM treatment efficiency of gas back-flushing showed the larger than that of water back-flushing atback-flushig period 10 min. It proved that the adsorption or photo-oxidation of PES beads could be activated by the moreeffective bead-cleaning of gas back-flushing than water back-flushing.