광촉매 및 다채널 세라믹 정밀여과 혼성공정에 의한 고탁도 원수의 고도정수처리: 유기물의 영향

다국어 초록 (Multilingual Abstract)

For advanced drinking water treatment of high turbidity water, we used the hybrid process that was composed of photocatalyst packing in space of between outside of multi-channel ceramic microfiltration membrane and membrane module inside. Photocatalyst was polypropylene (PP) beads coated TiO2 powder by CVD (chemical vapor deposition) process. Instead of natural organic matters (NOM) and fine inorganic particles in natural water source, standard NOM solution was prepared with humic acid and kaolin. Water-back-flushing of 10 sec was performed per every period of 10 min to minimize membrane fouling. Resistance of membrane fouling (Rf) increased and J decreased as concentration of humic acid changed from 2 mg/L to 10 mg/L, and finally the highest total permeate volume (VT) could be obtained at 2 mg/L. Then, treatment efficiency of turbidity and UV254 absorbance were above 96.4% and 78.9%, respectively. As results of treatment portions by membrane filtration, photocatalyst adsorption, and photo-oxidation in (MF), (MF+ TiO2), (MF+ TiO2+ UV) processes, turbidity was treated little by photocatalyst adsorption, and photo-oxidation. However, treatment portions of UV254 absorbance by adsorption (MF+ TiO2) and photo-oxidation (MF+ TiO2+ UV) at humic acid of 4 mg/L and 6 mg/L were above 9.0, 9.5 and 8.1, 10.9%, respectively.