发明名称 |
Method for stabilizing and conditioning urban and industrial wastewater sludge |
摘要 |
The invention concerns a method for stabilizing and conditioning wastewater sludge. The invention is characterized in that it consists in treating sludge in an acid environment (3.0<=pH<=5.0), with an inorganic acid and two oxidizing agents, that is a ferric iron salt and hydrogen peroxide. The ferric iron salt is used in such an amount as to obtain a concentration ranging between 5 and 40 kg of Fe per iron of dry sludge; the hydrogen peroxide is used in such an amount as to obtain a concentration ranging between 5 and 40 kg of H2O2 per ton of dry sludge; mixing the treated sludge for a time interval sufficient to stabilize the sludge and improve its dehydrability; then flocculating the stabilized sludge by adding an organic polymer; then dehydrating the flocculated sludge. Said method enables to significantly improve the dehydrability properties of the sludge while increasing the dry solid content during its mechanical dehydration.
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申请公布号 |
US2005077245(A1) |
申请公布日期 |
2005.04.14 |
申请号 |
US20040497059 |
申请日期 |
2004.11.29 |
申请人 |
BLAIS JEAN-FRANCOIS;MERCIER GUY;DROGUI PATRICK |
发明人 |
BLAIS JEAN-FRANCOIS;MERCIER GUY;DROGUI PATRICK |
分类号 |
C02F1/52;C02F1/56;C02F1/66;C02F1/72;C02F11/00;C02F11/06;C02F11/12;C02F11/14;(IPC1-7):C02F1/52 |
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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