Method for treating ammonia-containing water
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United States of America
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Feb 4, 2020
Grant Date -
Jan 12, 2017
app pub date -
Feb 10, 2015
filing date -
Feb 10, 2015
priority date (Note) -
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Abstract
A method for treating ammonia-containing water containing ammonia, metal ions that form a complex with ammonia, and a reducing substance includes a first step of oxidizing the reducing substance by adding hydrogen peroxide to the ammonia-containing water; a second step of aerating the resultant water treated in the first step to remove the ammonia; a third step of forming an insoluble solid at a pH of 7 to 12 by adding at least one compound selected from the group consisting of iron salts, aluminum salts, calcium salts, and calcium hydroxide to the water treated in the second step; and a fourth step of separating the insoluble solid formed in the third step by solid-liquid separation.
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