Abstract
The combined application of a weak-acid ion exchange resin in the free-acid form and of an anion exchange resin in the bicarbonate form allows a partial demineralization of water. The particular advantage of this process is that CO 2 can be used for the simultaneous regeneration of both resins. As a consequence, the effluent contains only the amount of salt which has been eliminated in the service cycle. The present paper discusses results of field tests of the process with a mobile pilot plant in the case of drinking water demineralization.
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