The application of ozone treatment for ammonia removal in spent brine was investigated. The presence of bromide and bicarbonate ions in spent brine was advantageous for the efficient removal of ammonia. Iodide and chloride ions did not show positive effect on ammonia removal. The formation of BrO_3~-, a compound classified as carcinogenic, was below the limit of detection during the ozonation process. Furthermore, a kinetic model for the continuous ozone treatment for ammonia removal was derived and used for the determination of suitable treatment conditions and equipment design. In continuous ozonation experiments, pH decreased for longer retention times and trihalomethanes were produced.
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