C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 11/12 (2006.01) C02F 1/48 (2006.01)
Patent
CA 2307724
The present invention is directed to a pulsed electric-field system, apparatus and method for the effective disinfecting and dewatering previously-dewatered, biologically active waste-water sludges (e.g., municipal waste-water sludge) in an efficient manner, so as to dramatically reduce the resulting volume of the inert waste material which has to be disposed of by the municipality. The method employed sequentially consists of hydraulically pressurizing (24, 26) the previously dewatered sludge, pre-heating (32) the previously dewatered sludge to a predetermined temperature range, exposing the previously dewatered sludge to high energy pulsing electrical discharges (42), pressure separation (52) of the resulting solids and liquid fraction, and final pressure extrusion (70) of the separated solids through nozzles.
L'invention porte sur un système un appareil et un procédé à champ électrique pulsé servant à désinfecter et déshydrater entièrement des boues biologiquement actives d'eaux usées préalablement partiellement déshydratées (par exemple des boues d'eaux usées municipales) d'une manière efficace réduisant considérablement le volume résultant de la masse inerte de matière à rejeter par la municipalité. Le procédé séquentiel consiste à comprimer (24, 26) à la presse hydraulique les boues partiellement déshydratées, à les préchauffer (32) à une température prédéterminée, à les soumettre à des décharges électriques (42) pulsées à haute énergie, à séparer (52) par compression les solides résultants de la fraction liquide, puis à extruder (70) les solides séparés.
Held Jeffrey S.
Held Jeffrey S.
Macrae & Co.
Opencel Llc
LandOfFree
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