Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7439054 | Bioreactor system for biological degradation of oily sludge A 10,000 gallon sequencing batch reactor tank for the on-site bio-degradation of oily sludge. Bacteria already present in and adapted to oily sludge degrade the hydrocarbons found in oily sludge within two weeks from 20,000 ppm to less than 100 ppm. A degradation cy... | 10/21/2008 |
| 7407582 | Combination activated sludge—ballasted flocculation process A method and system for treating water or wastewater to remove both soluble BOD and suspended solids. The method entails directing first and second water or wastewater streams to a treatment system including an activated sludge system and a ballasted flocculation sy... | 08/05/2008 |
| 7404897 | Method for nitrogen removal and treatment of digester reject water in wastewater using bioaugmentation An efficient system and process for removing nitrogen from wastewater while enriching seed sludge in the mainstream treatment process. Bioaugmentation of seed autotrophic organisms facilitate the nitrification reactions by enhancing the rates of reaction advantageou... | 07/29/2008 |
| 7344643 | Process to enhance phosphorus removal for activated sludge wastewater treatment systems Contaminated wastewaters comprising biochemical oxygen demand (BOD), nitrogen and phosphorus are treated by an activated sludge process. The process utilizes an activated sludge tank, a solid-liquid separator, and a bioreactor to significantly reduce, or eliminate, ... | 03/18/2008 |
| 7341660 | Unitary three stage wastewater treatment system The invention is a three stage wastewater treatment system having a first tank, a second tank and a third tank, all in fluid communication and forming a unitary structure. The first and second tanks are nested, where the first tank is the innermost tank. The first t... | 03/11/2008 |
| 7332077 | Methods for biological treatment of waste waters In a vertical shaft bioreactor, improved devices and methods are provided for enhanced secondary and/or tertiary treatment of wastewater, including residential, municipal and industrial wastewater. The devices and methods of the invention are useful for enhanced sec... | 02/19/2008 |
| 7331569 | Liquid aeration system and method A system for aerating liquid within a liquid retention structure including a liquid delivery tube in fluid communication with a gas exchange chamber and a pump. The gas exchange chamber includes an air inlet and a gas outlet. The pump is configured to pump liquid wi... | 02/19/2008 |
| 7323108 | Combined biological and ballasted flocculation process for treating wastewater A wastewater treatment process is provided that entails both a biological or activated sludge process and a ballasted flocculation process. A first stream of wastewater is directed to a biological system for biologically treating the wastewater. The biological treat... | 01/29/2008 |
| 7309435 | Biological process for waste treatment and energy production Processes for the treatment of organic waste are disclosed comprising digesting organic waste under anaerobic conditions so as to convert at least a portion of the organic waste and produce a clear decant and a mixture of biomass and unconverted organic compounds, r... | 12/18/2007 |
| 7300585 | Method of treatment of effluent stream A method for treating an effluent stream containing material which it is desired to remove from the effluent stream comprises treating the effluent stream with a solution of an acid and a first polymer to reduce the pH of the thus-treated stream to a range of about ... | 11/27/2007 |
| 7279319 | Method and apparatus for injecting oxygen into fermentation processes A sparger for delivering fluid comprising a sparger pipe for carrying the fluid from a fluid source and downwardly directed nozzles to direct the delivery of fluid is disclosed. A substantially vertical connection pipe connects the sparger to the nozzles. Also, a me... | 10/09/2007 |
| 7255791 | In situ method and apparatus for biodegradation of alkyl ethers and tertiary butyl alcohol A method and apparatus for the in situ purification of aquifers contaminated with ethers and/or alcohols using a bacterial culture, a method of delivering the culture to the subsurface, and an oxygen delivery system. ... | 08/14/2007 |
| 7166220 | Systems and methods for organic wastewater treatment A system and method for organic wastewater treatment through denitrification and nitrification processes. The system for treating organic wastewater includes a multistage treatment tank having at least two stages in series. Each stage has a denitrification tank and ... | 01/23/2007 |
| 7156999 | Methods and apparatus for treating animal manure A method of treating animal manure yielding a final liquid fraction and solid fractions whereby the final liquid fraction has a suspended solids (SS) content of about 3 g/L or lower comprising subjecting at least a part of said manure to a first biological passive f... | 01/02/2007 |
| 7157001 | Carbon filtration process and apparatus for removing PCB's and other compounds from wastewater Process and apparatus for treating wastewater from a sewer system including the steps of: (A) removing solids contained in the influent to create solids-depleted preliminary effluent (PrE) and to protect downstream systems from premature failure due to wear from sol... | 01/02/2007 |
| 7144510 | Method and apparatus for treatment of a fluid stream A method for treating a fluid by providing a raw fluid to a process tank. The raw fluid may be water having varying degrees of contamination or another type of fluid. The method further consists of adding an ion exchange resin to the process tank to form a raw fluid... | 12/05/2006 |
| 7048852 | Method and apparatus for treating water or wastewater to reduce organic and hardness contamination A method of treating liquid including mixing coagulant with the liquid, introducing mixed coagulant and liquid into a primary reaction zone, containing an agitator, of a reactor which is substantially concentrically positioned with respect to a secondary reaction zo... | 05/23/2006 |
| 7029202 | Method for treating metal-contaminated water and soil A method for removing metal contaminants from water uses lignin derivatives, such as lignosulfonates and kraft lignin, a coagulant, such as a metal salt, and a pH-increasing composition. The lignin derivative is dispersed in the contaminated water, the coagulant is ... | 04/18/2006 |
| 7001520 | Method for treating waste-activated sludge using elecroporation A method of treating of municipal sludge, paper-pulp sludge, animal and plant waste, and the like, whereby the treatment thereof via electroporation causes the breakdown of waste activated sludge, which is then recycled back to a bioreactor, or to one or more additi... | 02/21/2006 |
| 6966993 | Method and plant for thickening sludge derived from water treatment by flocculation-decantation with ballasted floc A method is provided for thickening sludge produced through a ballasted flocculation process. The sludge and granular material from the ballasted flocculation process are directed to a sludge separator where the sludge is separated from the granular material. Therea... | 11/22/2005 |
| 6958121 | Aerobic digester for bodily waste material A digester is provided for aerobically and microbially digesting a batch of bodily waste material, such as an aqueous slurry of pig manure. The digester comprises side-by-side digestion and separation compartments, separated by a partition wall. A first slanted pipe... | 10/25/2005 |
| 6953869 | Process for working up secondary components in the preparation of dinitrotoluene The present invention relates to a process for working up organic secondary components which are formed in the one-stage or two-stage nitration of toluene to dinitrotoluene. These organic secondary components are present in the acidic and alkaline waste water from t... | 10/11/2005 |
| 6936741 | Process for working up the waste water obtained in the preparation of dinitrotoluene The present invention relates to a process for working up or treating aqueous waste waters which are formed during the nitration of toluene to dinitrotoluene with nitrating acid. These aqueous waste waters containing acidic wash water and alkaline wash water from th... | 08/30/2005 |
| 6923913 | Seaweed-based product for treating liquid waste, together with method for making and using the seaweed-based product A wastewater treatment product prepared from seaweed and a process for the treatment of wastewater. In a first step, seaweed is mixed with a preservative, micro-nutrient, oxygen-containing, and antifungal component. In the second step, the product of the first step ... | 08/02/2005 |
| 6916422 | Self-adaptive method for regulating an effluent treating plant, in particular for waste water The invention concerns a method for regulating a wastewater or sludge treating plant. Ponds and cells provided with aerating means are used for eliminating carbonaceous, nitrogenous, and phosphate pollutants. The invention is characterized in that an automaton uses ... | 07/12/2005 |
| 6872312 | Method of using high molecular weight water soluble polymers in membrane bioreactor systems An activated sludge process for the clarification of wastewater comprising introducing the wastewater into a reactor where microorganisms consume organic material in the wastewater to form a mixed liquor comprising water, the microorganisms and an activated sludge; ... | 03/29/2005 |
| 6863818 | Method and apparatus for treating wastewater using membrane filters An apparatus using activated sludge for the removal of biological nutrients from a wastewater includes a bioreactor for containing a mixture of wastewater under treatment and activated sludge. The bioreactor is divided into a plurality of serially connected treatmen... | 03/08/2005 |
| 6830690 | Two-stage high synthesis activated sludge system with intermediate bio-solids removal A process for treating organically contaminated waste water is provided comprising an initial treatment step whereby microorganisms are replicated and either attach to support media or remain suspended in the waste water. The microorganisms reduce the incoming bioch... | 12/14/2004 |
| 6824685 | Method and apparatus for treating waste water A wastewater treatment process involves solids-liquid separation after biological treatment, in which solids-liquid separation of activated sludge can be more efficiently performed. A mixture of wastewater and activated sludge obtained after biologically treating ra... | 11/30/2004 |
| 6824684 | Wastewater treatment method and apparatus According to this wastewater treatment apparatus, wastewater can be treated by novel action by a foaming tank 7 in comparison with a treatment method solely using a biological treatment tank 1 constituting an aeration tank. That is, wastewater can be t... | 11/30/2004 |
| 6770200 | Method and apparatus for enhancing wastewater treatment in lagoons A method and apparatus for building a lagoon based advanced treatment system or upgrading an existing lagoon system for advanced treatment of wastewater. The lagoon is provided with a baffle to create a complete mix zone in which an aeration system and bioconcentrat... | 08/03/2004 |
| 6733672 | System and method for the treatment of soot-laden water A system and method for treatment of soot-laden waste water is disclosed. The method comprises the steps of separating the soot from the waste water initially in a clarifier. The concentrated soot is then treated with an activated sludge mixture in a digester with a... | 05/11/2004 |
| 6723244 | Method and apparatus to achieve nitrification at low solids retention times A new process configuration, which is based on nitrifier bioaugmentation, achieves essentially complete nitrification at low solids retention times (SRTs) on a year round basis for plants that have a minimum of two activated sludge treatment trains. The process util... | 04/20/2004 |
| 6712970 | Sewage treatment process with phosphorus removal In the liquid side of sewage treatment process, a combination aerobic/anoxic stage is closely monitored such that phosphorus can be removed as well as nitrogen. As in a known process, the aerobic/anoxic stage is monitored as to a coenzyme of the active bacteria. Whe... | 03/30/2004 |
| 6709594 | Method for treating waste-activated sludge using electroporation A method of treating of municipal sludge, paper-pulp sludge, animal and plant waste, and the like, whereby the treatment thereof via electroporation causes the breakdown of waste activated sludge, which is then recycled back to a bioreactor, or to one or more additi... | 03/23/2004 |
| 6706185 | Biological method of phosphorus removal and biological phosphorus-removing apparatus An apparatus and method for the biological removal of phosphorus, in which raw water is introduced into the anaerobic tank 11, together with returned sludge from the sludge return pipe 14. Some of the water in the anaerobic tank 11 is sent to th... | 03/16/2004 |
| 6652752 | Biodegradation of oil sludge A method for the biodegradation on an oil-based sludge comprising a mixture of petroleum hydrocarbons is disclosed. The method comprises forming an aqueous solution in a reactor of an oil-in-water emulsion of the oil-based sludge, bacterial culture and nu... | 11/25/2003 |
| 6620323 | Apparatus and process for biological wastewater purification The present invention relates to an apparatus and a process for biological wastewater purification. According to the invention an activation tank (10) is provided in which, with feed of a catalyst, wastewater constituents are degraded by degradation means... | 09/16/2003 |
| 6613229 | Waste treatment method and apparatus with denitrification chamber A waste treatment method and apparatus including a denitrification chamber for denitrifying waste, an aeration basin for aerating the waste, and a clarifying device in which sludge particles separate out of the waste, leaving discharge and reusable sludge... | 09/02/2003 |
| 6602417 | Process for the treatment of waste water containing specific components e.g. ammonia A process is described for the biological treatment of waste water containing a specific component such as ammonia, wherein the waste water together with surplus sludge from an activated sludge reactor is treated in a bioaugmentation reactor, applying a h... | 08/05/2003 |
