| 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 ton 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. |
| 申请公布号 |
WO03045852(A1) |
申请公布日期 |
2003.06.05 |
| 申请号 |
WO2002CA01808 |
申请日期 |
2002.11.29 |
| 申请人 |
CORPORATION BIOLIX;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 |
主分类号 |
C02F1/52 |
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