发明名称 |
METHOD FOR THICKENING OR DEHYDRATING SLUDGE |
摘要 |
<p>Disclosed is a method for thickening or dehydrating sludge, which includes at least: a) a step of adding flocculants to the sludge to be treated; b) a step of flocculation by agitation of the sludge with the flocculants thus added in order to form a mixture of flocks and an aqueous solution; c) a step of mechanical separation of the flocks and the aqueous solution formed during the preceding step; d) a step of recovering the aqueous solution and the flocks that make up a treated sludge; wherein: the added flocculants are made up of at least one cationic starch (A) and at least one cationic polyacrylamide (P); the cationic starch or starches (A) including a fixed weight percentage of nitrogen of at least 2%; and the weight ratio (R) mA/(mA+mP), expressed as solids, is included between 0.6 and 0.99.</p> |
申请公布号 |
EP2925681(A1) |
申请公布日期 |
2015.10.07 |
申请号 |
EP20130820792 |
申请日期 |
2013.11.28 |
申请人 |
ROQUETTE FRÈRES |
发明人 |
CROWTHER-ALWYN, LAURA;CARRE, MEDHI;SIMON, MICHEL |
分类号 |
C02F11/14;C02F1/52;C02F1/56;C08B31/12 |
主分类号 |
C02F11/14 |
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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