Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 7153439 | Grease separator for kitchen sinks and other applications An oil/grease separator separates a lighter liquid from a mixture of the heavier liquid and a lighter liquid. A housing has an inner volume, an inlet to receive influent flow, an outlet to discharge the heavier liquid, which defines a static liquid level, and an out... | 12/26/2006 |
| 7081207 | Method for cleaning a filter element in a filtering chamber and filter carrying out the method The invention relates to a method for cleaning a filter element (9) located in a filtering chamber (10, 11) and to a filter implementing the method. The filter includes an inlet (4) leading to the inlet side (10) of the filtering chamber,... | 07/25/2006 |
| 7060186 | Method and apparatus for the treatment of wastewater A batch process and apparatus for treating wastewater in a system employing anaerobic and aerobic zone reaction vessels under elevated pressure is disclosed in which an amount of processed activated sludge material is charged into an aerobic zone and wastewater to b... | 06/13/2006 |
| 6926822 | Method and apparatus for removing particulate contaminants from commercial laundry wastewater A filtration apparatus includes a laundry waste sump, a primary 50 micron static screen filter, a 9,000 gallon equalization tank, at least one secondary media/carbon filter, a sludge holding tank with a pump to return excess water to the equalization tank, a backwas... | 08/09/2005 |
| 6821445 | Rainwater-treating apparatus in combined sewer system and backwashing method therefor The present invention is aimed at treating rainwater in a combined sewer system, while enabling removal of a majority of pollution substances even if a large amount of entering rainwater. The invention relates to a rainwater-treating apparatus in a combined sewer sy... | 11/23/2004 |
| 6692638 | Method and apparatus for removing particulate contaminants from commercial laundry wastewater A filtration apparatus includes a laundry waste sump, a primary 50 micron static screen filter, a 9,000 gallon equalization tank, at least one secondary media/carbon filter, a sludge holding tank with a pump to return excess water to the equalization tank... | 02/17/2004 |
| 6669839 | Wastewater pretreatment, gathering and final treatment process A process and system for pretreating, gathering, transmitting and finally treating waste produced at multiple locations includes pretreating the waste proximate the generation site, gathering the pretreated waste and transmitting the waste to a final trea... | 12/30/2003 |
| 6506298 | Biofiltering system for treating wastewater effluent A biofiltering system for treating wastewater effluent (e.g. from a septic tank) through a bed of peat 16 overlying an effluent absorption area 12 and into the earth beneath 14. The bed of peat has a predetermined biofiltering capacity. A fluid flow regul... | 01/14/2003 |
| 6261443 | System for handling drain waters of different degrees of contamination A drain water system includes a plurality of containers (7-9) within a building 1 for receiving respective drain waters differing in degree of contamination. A plurality of building 1 having such containers share a main drain water conduit leads to at lea... | 07/17/2001 |
| 6033568 | Bioreactor and method of measuring contaminants in an aqueous environment A method and apparatus are provided for measuring the concentration of contaminants in an aqueous water system, wherein the contaminants are measured with the bioreactor containing a biofilm or microbial community which acts on the water to be analyzed to... | 03/07/2000 |
| 5989428 | Controlling wastewater treatment by monitoring oxygen utilization rates A method and apparatus for treating waste material to remove selected components form the waste is described using a reactor or a series of reactors in fluid communication with each other for receiving the waste to be treated as influent. The influent for... | 11/23/1999 |
| 5902484 | Method and system for treatment of water and wastewater Biological processes for treating wastewater include the conventional activated sludge process, which has continuous flow in and out of each treatment cell, and the sequencing batch reactor (SBR) process, which operates on a batch fill and draw basis. The... | 05/11/1999 |
| 5885460 | Anaerobic migrating blanket reactor A continuously fed, compartmentalized reactor that reverses its flow in a horizontal manner. This system is developed without the requirement of elaborate gas-solids-separator and feed-distribution systems. Effluent recycling is not required, but mixing i... | 03/23/1999 |
| 5871652 | Method for high volume pipeline water filtration A method and apparatus for filtering particulates from a turbid liquid is provided. The apparatus is preferably used to filter particulates from water used to flush a pipeline after a cleaning operation, after hydrostatic testing or during product displac... | 02/16/1999 |
| 5853589 | Advanced biological phosphorus removal using a series of sequencing batch reactors The biological process is for treating wastewater in order to remove the phosphorus therefrom and thus obtain clarified water. The process is using two sequencing batch reactors (SBR) in series filled with a sludge-mixed liquor. The process consists of: c... | 12/29/1998 |
| 5792355 | Process for treating waste water The process for treating waste water uses the combination of a septic tank operating in series with a biological reactor such as a sequencing batch reactor. In this process, waste water is supplied and accumulated in a septic tank. In the septic tank, the... | 08/11/1998 |
| 5792342 | Apparatus for coordinating chemical treatment of sewage A method and apparatus for treating nuisance odor streams is provided. One embodiment of the invention is directed to a method and apparatus in which deodorizing chemical agents are applied to an evaporative reaction pack situated within a gas chamber hav... | 08/11/1998 |
| 5770091 | Method of plain sedimentation and physical-chemical sedimentation of domestic or industrial waste water An untreated flow of waste water is normally introduced into a plain sedimentation unit during plain sedimentation periods to separate it into sand and a flow treated by plain sedimentation. During other periods, for example periods of heavy rain, a coagu... | 06/23/1998 |
| 5605629 | Method for the removal of nutrients containing carbon, nitrogen and phosphorus The method is of the type wherein the raw or untreated water to be treated is made to circulate in cells or biofilters with submerged filtering beds working anaerobically and then aerobically or vice versa. A treatment module is used comprising at least t... | 02/25/1997 |
| 5503748 | Sequencing batch air-lift reactor and method for treating wastewater A batch wastewater treatment process using a novel sequencing batch air-lift reactor (SBALR) and upflow sludge blanket is described. The static Fill step of the sequencing batch process has an upflow feed of wastewater through an upflow sludge blanket ele... | 04/02/1996 |
| 5413706 | Wastewater treatment apparatus with an outer filtration unit and an inner settling unit A wastewater treatment system includes inner and outer relatively telescopic units, the outer telescopic unit including an outer container having a bottom wall and a peripheral wall collectively defining a generally upwardly opening chamber, a filter exte... | 05/09/1995 |
| 5395527 | Process and apparatus for treating wastewater in a dynamic, bio sequenced manner A process for treating wastewater in a dynamic bio-sequenced manner in a single SBR reactor already filled with an activated sludge mixed liquor. In this process which is simple, fast and biologically and hydraulically "on going" and which allows one sing... | 03/07/1995 |
| 5348653 | Process for the biological purification of effluent Process for the biological purification of effluent which makes it possible either to ensure complete treatment of the carbon pollution and the nitrogen pollution at the nominal output, or to remove the biological oxygen demand or BOD only during a substa... | 09/20/1994 |
| 5322387 | Waste water drainfield A waste water drainfield for a sewerage disposal system of the type comprising a plurality of conventional absorption trenches includes a distribution device at each absorption trench for separating waste water into two components of preselected proportio... | 06/21/1994 |
| 5264120 | Wastewater treatment mechanism A wastewater treatment system includes inner and outer relatively telescopic units, the outer telescopic unit including an outer container having a bottom wall and a peripheral wall collectively defining a generally upwardly opening chamber, a filter exte... | 11/23/1993 |
| 5207896 | Wastewater treatment mechanism A mechanism for wastewater treatment which includes a plurality of solids settling chambers, at least a primary, secondary and a tertiary filter for selectively filtering wastewater and effecting settling of solids of different sizes in the settling chamb... | 05/04/1993 |
| 4877537 | Pumping system for gates A pumping system for gates wherein a sluice body liftably received in the guide grooves formed in the side walls of a water channel mounts a plurality of pumps in parallel with each other, the suction ports and the discharge ports of the pumps being locat... | 10/31/1989 |
| 4808304 | Apparatus for the dewatering of phosphate slimes Method and apparatus for dewatering mill tailings, slimes and slurries, wherein ultra fine particles materially reduce the rate of natural dewatering and hinder their disposal in the mining and processing of phosphate, coal, potash, uranium, talc and the ... | 02/28/1989 |
| 4555340 | Excess overflow orifice tubes A final clarifier for a sewage treatment plant has a peripheral feed influent channel with lower distribution ports and is also provided with tubes to minimize the headloss in the clarifier. The minimum headloss tubes are set to allow the basin to operate... | 11/26/1985 |
| 4469596 | Fluid transport conduit system in equilibrium with its environment A conduit system for transporting municipal or industrial wastes economically and efficiently is shown. The conduit system comprises a conduit which is located within a body of water and which has a thin, flexible wall adapted to maintain the contents of ... | 09/04/1984 |
| 4387020 | Flow control apparatus A flow control apparatus is described for inclusion in a waste water treatment system intermediate a surge tank and a first active processing stage such as a biological treatment tank employing a trickling filter. The apparatus consists of a form of "head... | 06/07/1983 |
| 4308150 | Operation control method for a waterworks system In a waterworks system wherein a plurality of zones are coupled by pipes, each of the zones including one purification plant and at least one service reservoir for supplying consumers with clear water fed from the purification plant; before initiation of ... | 12/29/1981 |
| 4303527 | Surge control in the biological purification of wastewater In a process for the biological purification of wastewater wherein the wastewater is treated in a purification plant comprising at least one storage tank and at least one biological treatment stage, the improvement wherein the entering wastewater, in case... | 12/01/1981 |
| 4268383 | Flow system control with time delay override means A vacuum operated sewage system includes a static pressure sensor establishing a trigger signal at a selected first level in a standpipe. The sensor is connected upstream of a discharge control valve and actuates a trigger and timer controller at the sele... | 05/19/1981 |
| 4198298 | System and apparatus for control and optimization of filtration process A process control apparatus and system for dewatering a solids ladened slurry of water and waste water embodying one or more of four primary process control techniques, depending upon the particular process application. The four process control techniques... | 04/15/1980 |
| 4196074 | Sewage treatment Oxygen containing gas is dissolved in sewage passing to, or through, a sewer during periods when sewage is being pumped therethrough. A stream of the sewage is withdrawn during periods when sewage is being held in the sewer. This stream is passed through ... | 04/01/1980 |
| 4160723 | Method and apparatus for removal of pollutants from waste water Apparatus is provided for removing pollutants from waste water. An activated sludge system is disclosed comprising generally a two tank system in which uniquely designed and positioned air diffusion and liquor transfer systems are utilized in combination ... | 07/10/1979 |
| 4115263 | Periodic chlorination and superchlorination of recirculating swimming pool water An improvement in a method for maintaining swimming pool water fit for use and apparatus for implementing same that is cyclical and that requires minimal amounts of treatment chemical, such method including introducing into such body of water an amount of... | 09/19/1978 |
| 3979289 | Filtration method Filtration in an internal rotary filter system is improved by externally impacting the filter screen as it rotates with a programmed spray of liquid that is varied from a relatively low to a relatively high pressure. In certain instances, this programmed ... | 09/07/1976 |
| 3962084 | Rain storing tank A rain storing tank of generally circular design having a combined-water channel entering the tank substantially tangentially and having a sanitary sewage drain line leading from substantially the center of the bottom of the tank.... | 06/08/1976 |
