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ED-EDR double step electrodialytic pre-treatment and pre-concentration of “Debiensko” coal-mine brine was examined. Univalent ion permeable Tokuyama Co. ACS and CMS membranes were applied in the first electrodialysis step and normal grade CMV, AMV Asahi Glass membranes in the second. Coal-mine brine with 32.8 g/L Cl − content was desalinated and concentrated at a current density of 344–688...
A conception of comprehensive utilization of saline waters from “Wesola” coal-mine was proposed. There the water from level 665 m, that contains about 35.45 g/L Cl − , is pretreated by nanofiltration (NF) and then evaporated in twig towers while the water from level 465 m of about 2.25 g/L Cl − content is desalinated and simultaneously concentrated by electrodialysis (ED) with univalent...
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