Liquid purification or separation – Processes – Ion exchange or selective sorption
Reexamination Certificate
2007-12-25
2007-12-25
Hruskoci, Peter A. (Department: 1724)
Liquid purification or separation
Processes
Ion exchange or selective sorption
C210S694000, C210S711000, C210S713000, C210S727000, C210S787000
Reexamination Certificate
active
10499108
ABSTRACT:
The invention concerns a water treatment method which consists in introducing coagulated water in a flocculation zone, to enable flocculation of microflocs in the presence and around a ballast; introducing the mixture in a decantation zone; separating the treated water in overflow and a mixture of sludge and the ballast in underflow; conveying at least part of said mixture to a sludge/ballast separating system and recycling into or upstream of the flocculation zone the ballast and part of the sludge introduced in said separation system. The invention is characterized in that it comprises steps which consists in conveying the mixture to the sludge/ballast separating system; in subjecting said mixture to a ballast concentration, extracting the ballast from the sludge extracted from the separation system; and more than 20% of the volume entering the sludge/ballast separating system is recycled into or upstream of the flocculation zone, after passing through at least part of the sludge/ballast separation system; and the ballast has an effective diameter greater than 60 micrometers, and the sludge extracted from the treatment system has a concentration higher than 5 g/L.
REFERENCES:
patent: 4274968 (1981-06-01), Grutsch et al.
patent: 4675112 (1987-06-01), Verde
patent: 4927543 (1990-05-01), Bablon et al.
patent: 5730864 (1998-03-01), Delsalle et al.
patent: 5770091 (1998-06-01), Binot et al.
patent: 6010631 (2000-01-01), Delsalle et al.
patent: 6210587 (2001-04-01), Vion
patent: 6645386 (2003-11-01), Moreau et al.
patent: 6824692 (2004-11-01), Binot et al.
patent: 6919031 (2005-07-01), Blumenschein et al.
patent: 6966993 (2005-11-01), Binot
patent: 2 627 704 (1989-09-01), None
patent: 2 719 234 (1995-11-01), None
patent: 2 758 812 (1998-07-01), None
patent: 2 785 899 (2000-05-01), None
Binot Patrick
Dahl Claus Poulsen
Zuback Joseph Edward
Coats & Bennett P.L.L.C.
Hruskoci Peter A.
OTV SA S.A.
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