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| Number | Title | Issue Date |
| 7309423 | Wastewater treatment and dispersal system A wastewater treatment and dispersal system wherein wastewater will stand until it has a BOD of less than about 125 mg/l. The dispersal field may comprise inner and outer conduits, an inner conduit and a permeable outer cover, or a trough and an enclosure. ... | 12/18/2007 |
| 7300577 | Wastewater treatment and dispersal system A wastewater treatment and dispersal system wherein wastewater will stand until it has a BOD of less than about 125 mg/l. The dispersal field may comprise inner and outer conduits, an inner conduit and a permeable outer cover, or a trough and an enclosure. ... | 11/27/2007 |
| 7118669 | Wastewater treatment and dispersal system A wastewater treatment and dispersal system wherein wastewater will stand until it has a BOD of less than about 125 mg/l. The dispersal field may comprise inner and outer conduits, an inner conduit and a permeable outer cover, or a trough and an enclosure. ... | 10/10/2006 |
| 7074339 | Apparatus for separating solids from a liquid An improved apparatus and method is disclosed for separating solids from a liquid. The apparatus and method comprises a first separator for circulating the solids and the liquid to concentrate the solids within the liquid. The concentrated solids are discharged into... | 07/11/2006 |
| 7029579 | System for solid-liquid separation A system for use in filtering a slurry using air pressure to squeeze the slurry material and dewatering it. The system including a source of slurry, a chamber, a filter belt that passes through the chamber, a manifold inlet supplying the slurry to a first side of th... | 04/18/2006 |
| 6350377 | Device for thickening liquids or sludges An apparatus for thickening liquids or thin sludges by water extraction, having a bottom, a tub having an underside, stands supporting the tub on the bottom, a ripening time chamber for receiving the liquids or thin sludges, first devices for admixing a p... | 02/26/2002 |
| 6143186 | Device for continuous filtration of liquids A continuous filter device for liquids has a filter chamber that receives a granular bulk material forming a filter bed. The filter chamber has rectangular inner-walls with a liquid-permeable inlet side and a liquid-permeable outlet side positioned opposi... | 11/07/2000 |
| 5895567 | Biological waste fluid cleaner The invention relates to an apparatus for cleaning organic waste material from waste fluid. This comprises a container at least partially filled with carrier elements, a waste fluid feed debouching into the container close to a vertical end, a fluid outle... | 04/20/1999 |
| 5707512 | Apparatus for the separation of solid-liquid mixtures The invention relates to a process for the separation, in particular filtration of liquids and solids from solid-liquid mixtures, such as from a mineral, ore, coal or sludge suspensions of contaminated earth. The processing space of the filtration apparat... | 01/13/1998 |
| 5366626 | Filter apparatus In horizontal belt filter apparatus wherein the belt is progressed by alternate incremental motion of the upper run and the lower run, wash liquor used for washing the belt in the lower run, e.g. by spraying into a wash box, is recycled and used for washi... | 11/22/1994 |
| 5308479 | Sewage disposal apparatus employing circulating filter media The present invention relates to a sewage disposal method employing a filter media and an apparatus for carrying out the same intended for the effective prevention of the clogging of the filter media. Sewage currents are generated in a circulation passage... | 05/03/1994 |
| 5204009 | Slurry rising apparatus and method therefor A method of rinsing a slurry contained between a pair of converging mesh belts comprising the steps of splitting the slurry into two streams, each stream adjacent one of the converging mesh belts, introducing a stream of rinsing fluid between the two slur... | 04/20/1993 |
| 5116423 | Apparatus for washing pulp The present invention relates to a method and an apparatus for washing pulp according to which method the pulp is supplied onto a movable liquid-pervious support surface to form a substantially continuous layer; and washing liquid is supplied to the pulp ... | 05/26/1992 |
| 5021166 | Method and an apparatus for extracting a liquid from a sludge An apparatus for extracting liquid from a sludge/conditioning agent mixture which comprises a first endless belt (10) of filter material; a second endless belt (12) of filter material; and rollers (20, 21, 22, 23, 24, 25, 26, 27, 13, 14, 15) for the belts... | 06/04/1991 |
| 4961862 | Amendment addition system and method for twin belt press filter A twin belt filter press system has an amendment such as sawdust, fed to a sludge or slurry being dewatered after the sludge/slurry has been initially dewatered in a gravity drain section to form a cake on a first porous belt. The amendment cascades into ... | 10/09/1990 |
| 4919158 | Method and apparatus for washing pulp The present invention relates to a method and an apparatus for washing pulp according to which method the pulp is supplied onto a movable liquid-pervious support surface (2) to form a substantially continuous layer (7); and washing liquid is supplied to t... | 04/24/1990 |
| 4861496 | Electro-dewatering method and apparatus An apparatus and method of electro-dewatering sewage sludge and other high water sludges. The sludge is passed through a conveyor means that is electrically charged. The anode has metal bristles or wires that protrude into the sludge mass. Water that migr... | 08/29/1989 |
| 4595499 | Gravity belt thickener and belt press combination A belt press for use in removing water from sewage sludge, and including a frame, a pair of belts for compressing sludge material therebetween, the said belts being water-permeable whereby water in said sludge may drain through said belts, and a gravity b... | 06/17/1986 |
| 4539827 | Belt washing improvements The washing efficiency of removal of cooking and bleaching chemicals from cellulose paper pulp on horizontal belt washing filters is improved by disrupting the filter mat adjacent the belt intermediately of soft, displacement wash liquor applications to t... | 09/10/1985 |
| 4395815 | Method of making electric machines An electric machine, such as an induction motor, having a rotor and stator core formed of metal strip coiled about a centrally longitudinal axis extending generally normal to the plane of the strip, and wherein the strip is provided with depressions on lo... | 08/02/1983 |
| 4388186 | Sludge treating apparatus A sludge treating apparatus comprises a centrifugal condensing machine for forcedly condensing a raw sludge produced by a waste water treating apparatus. The raw sludge condensed to approximately 94 to 90% in terms of the percentage of moisture content by... | 06/14/1983 |
| 4341628 | Belt pressure filter A belt pressure filter comprises a gravity dewatering zone for dewatering a sludge as a function of the gravity and a forced dewatering zone for a forced dewatering of the sludge by means of external pressure. An endless filter belt travels from the gravi... | 07/27/1982 |
| 4204959 | Apparatus for the treatment and composting of biological waste A first thermally insulated hollow cylinder is mounted for rotation about its longitudinal axis and a second hollow cylinder is mounted within the first cylinder for conjoint rotation therewith. The ends of the cylinders are closed to define a first annul... | 05/27/1980 |
| 4186089 | Method and apparatus for dewatering of sludgy substance Within a chamber having an inlet for admitting a sludgy substance for dewatering and an outlet for discharging the dewatered cake of the sludgy substance, there are disposed two laterally opposed filtration trains each consisting of a plurality of rotary ... | 01/29/1980 |
| 4123360 | Method and apparatus for the liquid treatment of filter cakes Method and apparatus for the liquid treatment of filter cakes formed as a layer on a moving filter web. The method comprising removing portions of the cake from the web by agitators having vanes which break up part of the cake on the filter and move the p... | 10/31/1978 |
| 4105558 | Apparatus for draining of muddy liquids Apparatus for draining of muddy liquids, especially of sludges and slurries in sewage clarification plants, where first of all an ionic coagulant, eg., an anionic or cationic coagulating agent, is added to the muddy liquid in a first ionic coagulating mea... | 08/08/1978 |
| 3966611 | Filter In filters of the type in which a cake of solids deposited from a liquid slurry thereof on a generally horizontal filter medium is subjected to treatment involving passage of liquid through the cake while on the filter medium, means is provided for increa... | 06/29/1976 |
| 3966610 | Filter In filters of the type in which a cake of solids deposited from a liquid slurry thereof on a generally horizontal filter medium is subjected to treatment involving passage of liquid through the cake while on the filter medium, means is provided for increa... | 06/29/1976 |
