RECOVERING METHOD OF AMMONIUM BICARBONATE SOLUTION IN WATER SEPARATING APPARATUS FROM SUCH AS SEA WATER, POLLUTED WATER USING FORWARD OSMOSIS

摘要

The present invention is for recycling Ammonium bicarbonate solution used as an osmosis liquid in a water treatment system using forward osmosis. The present invention includes the steps of: separating carbon dioxide from ammonia by inducing part of a mixed solution containing ammonium bicarbonate used as an osmosis liquid into an evaporating unit and heating the mixed solution; absorbing the evaporated carbon dioxide and ammonia by inducing the remaining portion of the mixed solution into one or multiple absorbing units; concentrating the ammonium bicarbonate into one or multiple concentrating units; and cooling the concentrated ammonium bicarbonate solution and resupplying at least part of the solution as osmosis liquid for forward osmosis. The present invention includes: a tower type evaporating unit capable of separating and concentrating the ammonium bicarbonate, an absorbing unit, and a concentrating unit, which prevents the precipitation of salt while recycling ammonium bicarbonate continuously.