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US 6,083,404 AGranted
Method of dewatering difficult sludges
AssigneeNalco Chemical Company
InventorsAnthony G. Sommese, Jitendra Shah
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Abstract
The present invention provides a new method for dewatering difficult sludges, such as autothermal thermophilic aerobic digestion sludges. The method incorporates a three-component treatment system. Initially, the difficult sludge is dosed with an inorganic coagulant and then the resulting sludge-inorganic mixture is dosed with a microparticle component. Lastly, the resulting mixture is dosed with a high molecular weight flocculant.
Claims11
A method for dewatering a difficult sludge containing small particles comprising the steps of:
- dosing the sludge with an inorganic coagulant to form a first mixture;
- dosing the first mixture with an anionic microparticle to form a second mixture;
- dosing the second mixture with a flocculant to form a third mixture;
- and
- dewatering the third mixture.
2 more elements
Dependencies are inferred from the claim text.