VMD를 이용한 해양심층수의 농축 실험 및 분석

Abstract

Current seawater-concentration and mineral-extraction technologies rely on reverse osmosis(RO) and evaporation, but a disadvantage is the considerable energy consumption. Membrane distillation (MD) is a seawater desalination technology that involves phase change via heat and membrane technology. The driving force behind MD is the vapor pressure generated by the temperature differences between the two sides of a hydrophobic membrane. Vacuum membrane distillation (VMD) is a derivative technology used to desalinate seawater by generating vacuum pressure on the permeate side. MD can be carried out at lower temperatures compared to evaporation methods, and it consumes less energy than RO process. Also, it is suitable for the treatment of concentrated water with a high salt concentration, because the quality of the water obtained after distillation is not significantly affected by the salinity of the feed water.

In this study, to overcome the disadvantages of the conventional technologies, concentration of deep-sea water with VMD were performed, and the composition of the concentrated water was analyzed by varying the temperature and the concentration of the feed water. involves phase change via heat and membrane technology. The driving force behind MD is the vapor pressure generated by the temperature differences between the two sides of a hydrophobic membrane. Vacuum membrane distillation (VMD) is a derivative technology used to desalinate seawater by generating vacuum pressure on the permeate side. MD can be carried out at lower temperatures compared to evaporation methods, and it consumes less energy than RO process. Also, it is suitable for the treatment of concentrated water with a high salt concentration, because the quality of the water obtained after distillation is not significantly affected by the salinity of the feed water.

In this study, to overcome the disadvantages of the conventional technologies, concentration of deep-sea water with VMD were performed, and the composition of the concentrated water was analyzed by varying the temperature and the concentration of the feed water.