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US 5,549,812 AGranted
Process and apparatus for processing industrial waste water by electrolysis
AssigneeWT Wassertechnologie GmbH
InventorWilli Witt a.k.a. Witte
Life of this patent
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Abstract
Electrolysis of water is effected while the water flow is pulsed utilizing pulse direct current in an electrolyzer having a medium flow between pairs of electrodes and a meandering flow from electrode pair to electrode pair, treating waste water and producing a flocculate which is removed in a stilling or settling tank cascade.
Claims10
A process for processing an industrial waste water by electrolysis, according to which the waste water is conducted past DC-activated electrodes in an electrolysis reactor, said process comprising the steps of:
- (a) passing an industrial waste water containing contaminants susceptible to flocculation and precipitation upon electrolysis of the waste water between electrodes having parallel plate surfaces defining constricted flow-passages between them;
- (b) subjecting waste water between said electrodes to electrolysis by energizing said electrodes with direct-current pulses, thereby breaking down and chemically altering contaminants in the electrolyzed water to form a sedimentatable flocculate therein;
- (c) pulsingly accelerating and decelerating flow of said waste water between Said parallel plate surfaces to periodically forcibly increase flow velocity of the waste Water between said surfaces during the electrolysis;
- and
- (d) separating said flocculate from a cleaned water.
2 more elements
An apparatus for processing an industrial waste water comprising:
- an electrolysis reactor having spaced apart electrodes having parallel plate surfaces defining constricted flow-passages between them;
- means for passing an industrial waste water containing contaminants susceptible to precipitation upon electrolysis of the waste water through said reactor and between said electrodes with direct-current pulses to subject waste water between said electrodes to electrolysis, thereby breaking down and chemically altering contaminants in the electrolyzed water thereby forming a sedimentable flocculate in the electrolyzed water;
- means for pulsingly accelerating and decelerating flow of said waste water between said parallel plate surfaces to periodically forcibly increase flow velocity of the waste water between said surfaces during the electrolysis;
- and
- means connected with said reactor for separating said flocculate forming cleaned water, said electrodes in said reactor being constituted as parallel plates spaced apart and defining a meandering waste water guide path from gap to gap between successive plates, said plates being formed with guide ducts between parallel surfaces of the elected plates so that waste water is guided positively in a meandering path over the plate surfaces.
2 more elements
Dependencies are inferred from the claim text.