Abstract
Abstract : The performance of a domestic ceramic membrane with pore size of 0.1 µm was evaluated to produce drinking water. A pilot-scale ceramic membrane filtration plant with a capacity of 1 m 3 /d was operated at the filtration flux of 3.0 m 3 /m 2 ․d to investigate the effect of both backwash interval and pre-ozonation on TMP (trans-membrane pressure) increasing rate. The TMP increased with increasing the backwash interval. However, the application of pre-ozonation reduced the TMP increasing rate remarkably. When 1 mg/L of ozone was dosed with contact time of 5 min, TMP increasing rate at the backwash interval of 1 hr was reduced by 30%. This result indicated that pre-ozonation was very effective in reducing membrane fouling. There was almost no change in TMP increasing rate when the ozone contact time was maintained in the range of 5 to 15 min. Increasing ozone concentration up to 3 mg/L showed beneficial effect on TMP increasing rate. Key Words : Drinking Water, Ceramic Membrane, Trans Membrane Pressure (TMP), Pre-ozonation, Ozone Dose and Contact Time
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