发明名称 |
Phosphoric acid/lime hazardous waste detoxification treatment process |
摘要 |
A process for producing a non-hazardous sludge from an aqueous solution which contains heavy metals comprising the steps of: (a) adding phosphoric acid or an acid phosphate salt to the aqueous solution to precipitate the heavy metals; (b) lowering the pH of the solution to less than about 5.0; (c) adding a coagulant to the solution; (d) raising the pH of the solution to above about 7.0 by the addition of a calcium source; and (e) dewatering the resulting non-hazardous sludge.
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申请公布号 |
US4671882(A) |
申请公布日期 |
1987.06.09 |
申请号 |
US19850792636 |
申请日期 |
1985.10.28 |
申请人 |
DEERE & COMPANY |
发明人 |
DOUGLAS, GARY R.;KUSY, PAUL F.;GROTELUESCHEN, RALPH D. |
分类号 |
C02F1/52;C02F1/54;C02F9/00;(IPC1-7):C02F1/56 |
主分类号 |
C02F1/52 |
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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