Desalination is a key technology to overcome water shortage problem in a near future. High energy consumption is an Achilles’ heel in desalination technology. Osmotically driven membrane processes like forward osmosis(FO) was introduced to address this energy issue. Characterizing membrane properties such as water permeability(A), salt permeability(B), and the resistance to salt diffusion within the support layer(KICP) are very important to predict the performance of scaled-up FO processes. Currently, most of researches reported that the water permeability of FO membrane was measured by reverse osmosis(RO) type test. Permeating direction of RO and FO are different and RO test needs hydraulic pressure so that several problems can be occurred(i.e. membrane deformation, compaction and effect of concentration polarization). This study focuses on measuring water permeability of FO membrane by FO type test results in various experimental conditions. A statistical approach was developed to evaluate the three FO membrane properties(A, B, and KICP) and it predicted test result by the internal and external concentration polarization model.

1. 서 론
 2. 연구 방법
  2.1 데이터 수집
  2.2 정삼투막의 성능인자 결정
  2.3 RO method과 FO method로 결정한 정삼투막성능인자의 평가
 3. 실험결과 및 토의
  3.1 ‘FO method’로 결정한 FO막 성능인자
  3.2 정삼투막 성능인자를 이용한 실험결과 예측
  3.3 FO method으로 구한 성능인자의 평가
 4. 결 론
 References

• 이준서(부경대학교 토목공학과) | Junseo Lee
• 김수한(부경대학교 토목공학과) | Suhan Kim Corresponding author