Liquid purification or separation – Processes – Utilizing electrical or wave energy directly applied to...
Patent
1997-09-22
1999-04-13
Hruskoci, Peter A.
Liquid purification or separation
Processes
Utilizing electrical or wave energy directly applied to...
205751, 210609, 210748, 210764, 210768, 422 22, C02F 1461
Patent
active
058939792
ABSTRACT:
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 sewage 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 the previously dewatered sludge, pre-heating the previously dewatered sludge to a predetermined temperature range, exposing the previously dewatered sludge to a high energy pulsing electrical discharges, pressure separation of the resulting solids and liquid fraction, and final pressure extrusion of the separated solids through nozzles.
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