해양심층수 담수화 및 부산물 이용 시스템의 효율성 해석

Abstract

Recently, more people in the world suffer shortage of fresh water year by year. It may become rather severe locally than we did imagine due to global warming and water pollution. Desalination has been used to supplement fresh water for people in water scarce areas as well as sailors on board since 1950s. Currently, desalinated water is estimated to occupy only less 3% of world requirement. Though the recent advancement of desalination technology make the production cost for fresh water decrease remarkably, it still remains relatively expensive countermeasure. A variety of efforts were focused to enhance energy saving, lengthen membrane life and select source etc. It is the time to consider additional use of desalinated water or concentrated brine. Cost minimization can be presumed to compensate by sharing initial cost with other applications or by promoting utilization benefit by high-valued merchandising. This study deals with the series of reviewing desalination process, choosing source, reducing energy and applying additional use to minimize unit production cost. And then co-production or co-location between desalting and salt processing plants will be assumed and compared with single desalination plant. Because it depends on the supplying amount and price of brine, sensitivity will be analyzed to check the assumption. Though such a concept is already used in small scale business of deep seawater, this systematic approach was conducted to confirm for public use of deep seawater for water scarce region. Fig.