Reverse osmosis seawater desalination facilities can extend the cleaning cycle and replacement time of the reverse osmosis membrane by pretreatment process. Selection of pretreatment process depends on water quality. It was attempted in this study to select approriate pretreatment process for the Masan bay, which was high in particles and organic content. For this purpose, performances of pretreatment processes such as filter adsorber (FA), pore controllable fiber (PCF), and ultrafiltration (UF) were compared based on the silt density index (SDI). The SDI value of the filtrate should be less than 3. The study results showed that UF can produce the filtrate quality satisfying the requirement. However, the transmembrane pressure (TMP) of UF increased quickly, reaching 0.6 bar within 4 days. In order to secure stable operation, FA and PCF were combined with UF. The study results showed that combination of PCF and UF was able to extend the filtration duration (more than 2 months) until to reach TMP of 0.6 bar.

ABSTRACT
1. 서 론
2. 연구방법 혹은 재료 및 실험방법
    2.1 해수 성상
    2.2 전처리 실험 장치 및 운전 조건
    2.3 해수 수질 및 처리수 분석 방법
3. 결 과
    3.1 전처리 공정에 따른 처리 수질 비교
    3.2 각 전처리 공정의 여과 특성
    3.3 전전처리 공정을 이용한 UF 공정 장기 운전 결과
    3.4 PCF-UF 공정에 따른 역삼투 해수담수화 경제성평가
4. 결 론
References

• 임환규(경남대학교 토목공학과) | Hwankyu Lim (Civil Engineering Department, Kyungnam University) Corresponding author
• 김승현(경남대학교 토목공학과) | Seunghyun Kim (Civil Engineering Department, Kyungnam University)