发明名称 |
METHOD AND APPARATUS FOR TREATING AMMONIA-CONTAINING WATER |
摘要 |
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. |
申请公布号 |
US2017008786(A1) |
申请公布日期 |
2017.01.12 |
申请号 |
US201515119234 |
申请日期 |
2015.02.10 |
申请人 |
KURITA WATER INDUSTRIES LTD. |
发明人 |
IZAWA Shuhei |
分类号 |
C02F9/00 |
主分类号 |
C02F9/00 |
代理机构 |
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代理人 |
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主权项 |
1. A method for treating ammonia-containing water containing ammonia, metal ions that form a complex with ammonia, and a reducing substance, the method comprising:
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. |
地址 |
Tokyo JP |