Membrane distillation (MD) is a thermally driven desalination process with a hydrophobic membrane. MD process has been known to have a lower fouling potential compared to other pressure-based membrane desalination process (NF, RO). However, membrane fouling also occurs in MD process. In this study, the membrane fouling was observed in MD process according to the pre-treatment processes. The filtration and precipitation processes were applied as the pre-treatment to prevent the membrane fouling. The pore sizes of roughing filters were 0.4, 5, 10, 30, and 60 ㎛. The concentration of the coagulant was 1.2 mg/L as FeCl3. The membrane fouling on MD membrane was successfully removed with both pre-treatment processes.

ABSTRACT
 1. 서 론
 2. 연구방법
  2.1 분리막
  2.2 유입수 및 전처리 방법
  2.3 직접 접촉식 막 증류 실험 방법
  2.4 플럭스 모델
 3. 결과 및 고찰
  3.1 분리막 성능평가
  3.2 전처리 성능평가
  3.3 유입수 성상 분석
  3.4 SEM-EDX 분석
 4. 결 론
 References

• 윤택근(한국과학기술연구원, 녹색도시기술연구소, 고려대학교, 그린스쿨대학원(에너지환경정책기술대학원) | Taekgeun Yun (Green City Technology Institute, Korea Instiute of Science and Technology, KU-KIST GreenSchool, Graduate School of Energy and Environment, Korea University)
• 정성필(한국과학기술연구원, 녹색도시기술연구소) | Seongpil Jeong (Green City Technology Institute, Korea Instiute of Science and Technology,)
• 김혜원(한국과학기술연구원, 녹색도시기술연구소, 고려대학교, 그린스쿨대학원(에너지환경정책기술대학원) | Hyewon Kim (Green City Technology Institute, Korea Instiute of Science and Technology, KU-KIST GreenSchool, Graduate School of Energy and Environment, Korea University)
• 홍승관(고려대학교, 그린스쿨대학원(에너지환경정책기술대학원), 고려대학교, 건축사회환경공학부) | Seungkwan Hong (KU-KIST GreenSchool, Graduate School of Energy and Environment, Korea University, School of Civil, Environmental & Architectural Engineering, Korea University)
• 이석헌(한국과학기술연구원, 녹색도시기술연구소, 고려대학교, 그린스쿨대학원(에너지환경정책기술대학원) | Seockheon Lee (Green City Technology Institute, Korea Instiute of Science and Technology, KU-KIST GreenSchool, Graduate School of Energy and Environment, Korea University) Corresponding author