发明名称 |
METHOD FOR THE TREATMENT OF WATER TREATMENT SLUDGE |
摘要 |
A method for the treatment of sludge obtained from such a water treatment process wherein an aluminium or iron chemical is used as a coagulant, so as to reduce the amount of sludge, which method comprises the steps of: a) treating the water treatment sludge with an inorganic acid to produce an acidic sludge comprising dissolved aluminium or iron; b) optionally separating insoluble material from the acidic sludge to produce an acidic solution comprising dissolved aluminium or iron; e) treating said acidic sludge or said acidic solution with a +1-cation compound in the presence of sulphate ions in such conditions that the pH of the sludge or solution remains at a level where aluminium precipitates as an alunite compound or iron precipitates as a jarosite compound; and d) separating the precipitated alunite or jarosite compound from the remaining sludge.
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申请公布号 |
CA2165168(C) |
申请公布日期 |
2002.05.28 |
申请号 |
CA19942165168 |
申请日期 |
1994.06.16 |
申请人 |
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发明人 |
NILSSON, ROLF;JOKINEN, SIMO |
分类号 |
C02F1/52;C02F11/00;C02F11/14;(IPC1-7):C02F11/00 |
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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