철염계 응집제를 사용한 전응집침전, 전염소처리와 PVDF 재질의 정밀여과 막을 조합한 막 여과 정수처리시스템 평가에 관한 연구 = Performance Evaluation of MF Membrane Filtration Pilot System Associated with PreCoagulation-Sedimentation with Iron-Based Coagulant and Chlorination Treatment

다국어 초록 (Multilingual Abstract)

In this research, we investigated the variation of transmembrane pressure and permeate water quality with pre coagulation and sedimentation with iron based coagulant and chlorination of feed water for PVDF (polyvinylidene fluoride) based MF membrane filtration. NaClO was fed to the membrane module with dosage of 0.5 ㎎/L and maintained during filtration. To observe the effect of raw water, three types of raw and processed waters, including river surface water, coagulated water and coagulated-settled water, were applied. In case of river surface water, the transmembrane pressure increased drastically in 500 hours of operation. On the contrary, no significant increase in transmembrane pressure was observed for 1,200 hours of operation for coagulated water and coagulated-settled waters. The turbidity of permeate was lower than a detection limit of equipment for all raw waters. The removal efficiency of humic substances of coagulated water and coagulated-settled water was approximate ten times of that of surface river water. And, the removal efficiency of TOC and DOC was approximate two times of that of surface river water. From the results of plant operation, stable operation was maintained at 0.9 m3/m2·day filtration flux through the combination of pre-coagulation and pre-chlorination. However, the water quality of permeate was the best when pre-coagulation-sedimentation process was combined with pre-chlorination.

참고문헌 (Reference)

• 1 "膜を用いた淨水システム特徵と現狀水道協會雜誌" 69 (69): 29-,
• 2 "濁度, フミン質の凝集沈殿處理におけるシリカ系高分子凝集劑の 果" 94-95, 2001
• 3 "渡 義公（2003）水道における膜ろ過技術の展望日本の 驗から" 2003.6.20
• 4 "ボケの原因を探る" 147-162,
• 5 "アルツハイマ病" 92-102,
• 6 "Removal of humic susbatances by UF and NF membrnane systems" 40 (40): 121-129, 1999
• 7 "Removal of humic substances by membrane processes. American Chemical Society" Odegaard H and Thorsen T 46769-781, 1989
• 8 "PSIを凝集劑とした前凝集沈殿とMF膜を組み合わせた淨水システムの評" 2003
• 9 "Ozone-microfiltration system" 117 (117): 211-218, 1998
• 10 "Membrane filtration of Coagulated Suspensions" 115 (115): 20-40, 1989
• 11 "MF膜UF膜ろ過の 果的な前處理法と物理洗淨法に關する" 2001
• 12 "Humic acid as a fouling agent in filtration" 106 : 79-87, 1996
• 13 "Enhanced Flocculation/Sedimentation Process by a Jet Mixed Separator" 37 (37): 55-67, 1998b
• 14 "Effect of residual ozone on membrane foulong reduction in ozone resisting microfiltration (MF) membrane system" poster presentation 2-24, sep,2003
• 15 "Effect of Ozonation for reducing membrane-fouling in the UF membrane" 147 : 43-48, 2002
• 16 "Behavior of micro-particle in monolithic ceramic membrane filtration with pre-coagulation" 305 (305): 2003
• 17 "Application of Poly silicato-Iron to Coagulation of Algae and Municipal Wastewater Chemicalwater and Wastewater Treatment V" 3-13,
• 18 "A Effect of particle shape on crossflow filtration flux" 153 : 121-139, 1999
• 19 ". Protein foulin of UF membrane J. of Membrane Sci." 121-141, 1990