Secondary Concentration Technology of Brine from Membrane Seawater Desalination Process with Electrodialysis

Key Words : Desalination( ), Hybrid( ), SWRO( ), ED( )탈염 혼성 해수용역삼투 전기투석초록: 역삼투막을이용한해수담수화공정에서발생되는농축수의최소방류및회수율극대화를위한공정으로전기투석을이용한농축수의이차농축기술연구를수행하였다 실험방법은정전압운전방식.을채용하였으며 농축탈염조의용량비율 전압별변화및전해질을농축수로활용시등에대한검토를, / ,수행하였다 사용한막은다가이온막을채용하였으며 전력효율을최소화하며 농축수의농도를극대화. , ,및탈염수의농도를최소화할수있는조건도출을목표로삼았다 실험결과농축탈염조의비율은 대. / 15 , 12V의비율이 전압의경우 로전해질의경우농축수를이용시에도효율에는큰차이가발생하지않았다 이와같은실험조건에서도출된최적조건으로는탈염수의총용존고형물농도가 이차농축. 5.32g/l,수의염도는 이며전력량은탈염수톤당 로나타났다17.07% 16.74kWh .Abstract : This study is about the secondary concentration technology using electrodialysis process forminimum discharge and maximize recovery ratio from seawater desalination by reverse osmosis process. Theexperimental method adopted the constant voltage driving method and, concentrated/desalination volumecapacity ratio changes, voltage changes and electrolyte types. Multi-ion membrane is used, aiming to deriveconditions to minimize the TDS concentration of desalination water, to minimize the volumes of secnodaryconcentraion water and minimizing the power efficiency. The results of this study are as follows. The optimalratio of concentraion/desalination volume is 1:5, the final TDS concentration of desalinated water is 5.32g/l,the final secnodary concentrated water salinity is 17.07% and electric energy demands of desalinated water is16.74kWh/m