发明名称 |
Method of treating heavy-metal-containing wastewater with sulfidizing agent and treatment apparatus |
摘要 |
A method and apparatus for treating heavy-metal-containing wastewater using a sulfidizing agent. Sulfidizing treatment is carried out by adding a sulfidizing agent to heavy-metal-containing wastewater, while detecting hydrogen sulfide gas generated from the wastewater, such as to maintain a state in which hydrogen sulfide gas is just starting to be generated from the wastewater. When separately recovering each of a plurality of metals from wastewater in which are mixed ions of the plurality of metals, there is repeated for each of the metals a process in which the acidity of the wastewater is adjusted to within a range suitable for the metal to be separated out and recovered, a sulfidizing reaction is carried out on that metal, and the metal sulfide produced is precipitated and filtered off.
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申请公布号 |
US2004232084(A1) |
申请公布日期 |
2004.11.25 |
申请号 |
US20040488390 |
申请日期 |
2004.03.02 |
申请人 |
MATSUNAMI TOYOKAZU;OHNISHI AKIFUSA |
发明人 |
MATSUNAMI TOYOKAZU;OHNISHI AKIFUSA |
分类号 |
C02F1/00;C02F1/20;C02F1/52;C02F1/62;C02F1/66;C22B3/44;C22B7/00;C22B15/00;(IPC1-7):C02F1/52 |
主分类号 |
C02F1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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