| 摘要 |
An ion exchange process for treating waste water having caustic materials, uses a bed of cation exchange resin beads to which the waste water is added. Thereafter the bed of beads is allowed to absorb the caustic materials in a brine until the resin is exhausted. The bed having retained organic matter is regenerated by rinsing the bed with water to remove substantially all the organic matter; draining any remaining rinse water; adding water and allowing it to pass through the bed and exit therefrom; mixing the exiting water with acid to form a dilute acid; and adding this dilute acid to the bed until the water exiting the bed has substantially the same pH as the dilute acid entering the bed.
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