Method of dewatering sludge and the sludge thus dewatered

Details Method of dewatering sludge and the sludge thus dewatered Method of dewatering sludge and the sludge thus dewatered

2004-07-08

2009-12-08

Hruskoci, Peter A (Department: 1797)

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

C210S725000, C210S727000, C210S769000

Reexamination Certificate

active

07628925

ABSTRACT:
The invention concerns a method for dehydrating sludge, comprising adding a basic agent to sludge having a pH not more than 8, adding to the sludge at least one organic flocculating constituent, by adding said basic agent, increasing the sludge pH to a value not more than a pH at which occurs degradation of said at least one organic constituent, flocculating the sludge and separating in the flocculated sludge dehydrated sludge from a liquid phase, said basic agent being a magnesian limestone compound of formula xCaCO3,(1−x)[yMg(OH)2+(1−Y) MgO], wherein 0,45:=x=0,75, and 0=y=, the treated sludge having, until after said separation, said value less than a pH at which occurs degradation of said at least one organic constituent.

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PCT/EP2004/051422 International Search Report, dated Nov. 8, 2004.

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