Liquid purification or separation – Electrical insulating or electricity discharging
Patent
1982-03-15
1987-06-09
Wyse, Tom
Liquid purification or separation
Electrical insulating or electricity discharging
210400, 204300R, C02F 1100
Patent
active
046718745
ABSTRACT:
An apparatus and method for dewatering sludges and the like as part of landfill operations by electrokinetic techniques including placing anode and cathode electrode modules in contact with the sludge and applying electrical energy to the electrodes to establish an electric field in the sludge. Charged particles within the sludge, including macro-molecules, colloids, and suspended particles, elecrophoretically migrate to the oppositely charged counter electrode and consolidate. A filtration media located at one of the electrodes permits the electro-osmotic removal of water from the sludge to encourage solids densification. The electrical energy applied to the electrodes is a chopped, time-varying, intermittent unidirectional current having a rapid rise edge which provides dewatering results comparable to prior methods that used direct current or full AC current but at substantially reduced energy consumption to provide more economical dewatering. Presently preferred optimum conditions for practicing the invention are also disclosed, including means for applying the techniques of the disclosure to a continuous dewatering method and an apparatus for practicing that method.
REFERENCES:
patent: 565706 (1896-08-01), Summers et al.
patent: 923327 (1909-10-01), Burton
patent: 1198867 (1916-01-01), Nodon
patent: 1403822 (1922-05-01), Van Der Notte
patent: 1850808 (1932-03-01), Redd
patent: 1878235 (1932-09-01), Gartner et al.
patent: 1920239 (1933-09-01), Boyarte et al.
patent: 2161049 (1939-06-01), Hartsman
patent: 3092536 (1963-07-01), Russell
patent: 3336220 (1967-08-01), Neidl
patent: 3356603 (1967-12-01), Drew
patent: 3611793 (1971-12-01), Cerf
patent: 3701720 (1972-10-01), Fujita et al.
patent: 3726750 (1973-04-01), Stillings
patent: 3770605 (1973-11-01), McCoy
patent: 3899405 (1975-07-01), Iverson et al.
patent: 3915822 (1975-10-01), Vettman
patent: 3928155 (1975-12-01), Woodhouse et al.
patent: 3959088 (1976-05-01), Sullivan
patent: 3962069 (1976-06-01), Inoue et al.
patent: 3998688 (1976-12-01), Fischer
patent: 4033851 (1977-07-01), Oros
patent: 4043047 (1977-08-01), Galliker
patent: 4101400 (1978-07-01), Pepping
patent: 4174279 (1979-11-01), Clark et al.
patent: 4244804 (1981-01-01), Moeglich
patent: 4367132 (1983-01-01), Bell et al.
Excerpts from McGraw Hill Enclclopedia of Science & Technology, pp. 196-170, 599-601, 314, 207, 23, 182, 583, 37, 104, 169, 534, 599, 505, 166, 194-195 and 542-544 (copies enclosed).
Kelley et al.--Electrical Dewatering of Dilute Clay Slurries--1964.
Greyson--Electroosmotic Pumping for Dewatering Sewage Sludge--1970.
Pollution Engineering International, Inc.--1975.
Sprute et al.--Bureau of Mines Report of Investigations 8034 (see in particular p. 43)--1975.
Sprute et al.--Bureau of Mines Report of Investigations 8075 (see in particular p. 4)--1975.
Sprute et al.--Bureau of Mines Report of Investigations 8190--(see in particular pp. 8-10)--1976.
Sprute et al.--Bureau of Mines Report of Investigations 8197--(see in particular pp. 19-26)--1976.
Gray et al.--Electro-Osmotic Dewatering with Polarity Reversals--Technical Notes (pp. 51-55) Jan. 1977.
Wellpoint Dewatering Literature received at Champion International Oct. 27, 1978: "Construction Dewatering with Electro-Osmosis, Eductor Well and Deep Wells"; Wellpoint Detwatering Corporation--A World-Wide Contracting Service; Electro-osmosis Stabilizes Earth Dam's Tricky Foundation Clay; Power House Slop Stabilized by Electro-osmosis; Electricity Stiffens Clay Fivefold for Electric Plant Excavation.
"Casagrande"--Waste Sludge from Canton, N.C. Laboratory Electro-osmosis Test--1978.
Freeman--Electrically Augmented Vacuum Filtration in Dewatering Kaolin Slurries (see in particular slides 2-5)--1979.
Dorman--Electrokinetic Field Dewatering Using Loughney Technology (not public)--1980.
Collection entitled, "ELK--Reference File Author Index."
Dorman William C.
Fremont Henry A.
Champion International Corporation
Sommer Evelyn M.
Wyse Tom
LandOfFree
Continuous dewatering apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Continuous dewatering apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Continuous dewatering apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1827493