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 |
| 8029674 | Biological filter for oxidizing ammonia in drinking water treatment A process for treatment of water to convert ammonia to nitrate including: feeding water containing dissolved ammonia, as an influent introducing water to be treated, into a packed column containing filter media as packing; introducing air through a diffuser at the b... | 10/04/2011 |
| 8012353 | Method and apparatus for simultaneous clarification and endogenous post denitifrication A method for treatment of nitrified wastewater, the method including supplying wastewater to be treated to a tank having a layer of biomass supporting media near or at the top thereof, retaining biomass on and below the biomass supporting media for a sufficient time... | 09/06/2011 |
| 7914678 | Backwashing unsaturated wastewater filter A compact high efficiency combined biological and physical unsaturated wastewater treatment filter configured for periodic backwashing is disclosed. The filter utilizes packed media and removes pollutants and pathogens from wastewater and other dirty water sources. ... | 03/29/2011 |
| 7887706 | Method of biofiltration of a liquid effluent A method of biofiltration of a liquid effluent by simultaneous nitrification and denitrification uses the adding of an oxygen source at a predetermined rate and optionally the adding of a carbon source (such as whey) thus enabling the complete transformation of the ... | 02/15/2011 |
| 7833418 | Mechanical/biological filter for a filtration system A mechanical and biological filter system where in use water entering into a housing first contacts the mechanical filter covering access to the biological filter. As the water travels through the mechanical filter before reaching the biological filter, the water ha... | 11/16/2010 |
| 7790035 | Tertiary system and process for treating a liquid effluent from an onsite domestic secondary treatment unit Described are a tertiary disinfection system and process for treating a liquid effluent from a domestic secondary treatment unit. The liquid effluent has pathogenic micro-organisms, remaining suspended solids and dissolved organic pollutants. The system has an inlet... | 09/07/2010 |
| 7785469 | Waste water treatment process system An aerated biological filtration system (10) for treating waste water includes a treatment vessel (11) of elongated configuration which incorporates a circulating filter bed (23) and a static filter bed (24). The circulating filter bed in... | 08/31/2010 |
| 7749384 | De-nitrification treatment system and method An apparatus is provided that includes: a containment system 208 having at least one sidewall and bottom that are substantially impermeable to a passage of water; a distribution system 124 to introduc... | 07/06/2010 |
| 7744759 | Maintaining wastewater-treatment sand filters A downflow sand filter used for treating wastewater which has degraded in function from its original design is at least in part rejuvenated by flowing air downwardly through the bed during time when flow of wastewater is ceased. The low velocity air flow helps dewat... | 06/29/2010 |
| 7727398 | Colored wastewater discoloration method Colored wastewater from industries, agriculture and the like is discolored by adjusting pH of the wastewater and filtering the wastewater through a mixture of acid-treated sawdust produced from sawdust which has been disposed of after being used for fungi production... | 06/01/2010 |
| 7575686 | Process for autotrophic perchlorate reduction using elemental sulfur and mollusk shells The invention relates to a system and method to reduce perchlorate in wastewater utilizing perchlorate-reducing bacteria, sulfur as an electron donor and mollusk shells as alkalinity agent. Embodiments of the invention include a perchlorate-reduction system comprisi... | 08/18/2009 |
| 7501060 | Wastewater treating system A wastewater treating system includes: a vessel defining a vessel space therein, the vessel space being partitioned into an activated sludge zone that is adapted to receive waste water and a body of an activated sludge therein, and a coarse filtering zone that is di... | 03/10/2009 |
| 7485232 | Water treatment method and water treatment apparatus In a water treatment apparatus, microorganisms propagating on wood charcoal are activated by micro-nano bubbles contained in treatment water. Water treatment is carried out with the activated microorganisms propagated on the wood charcoal. Thereby, a stable treatmen... | 02/03/2009 |
| 7468134 | See-thru self cleaning biological filter system for aqua-culture A system is described for collecting, filtering and removing dirt, debris, detritus, active organic materials, chemicals and toxins from water in fish ponds and general aqua-culture applications. This system includes a filter tank with supporting base containing bio... | 12/23/2008 |
| 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 |
| 7425268 | Device and related methods for purifying a liquid In an aspect of the invention, a device for purifying water in a water water garden or fish pond comprises a filter medium configured to clean the water flowing through the device, and a housing configured to contain the filter media. The housing includes a wall con... | 09/16/2008 |
| 7407580 | System and method for treating carbon, nitrogen, phosphorous containing wastewater The present invention relates to a wastewater treating system and method for removing pollutants of carbon, nitrogen, phosphorous, comprising: a first reactor contains methanogenic bacteria, PAO and denitrifying bacteria for eliminating the organic carbon in denitri... | 08/05/2008 |
| 7407581 | Biodegradation of oxyanions such as perchlorate on ion exchange resins Improved systems and methods for removing the load of perchlorate and other oxyanions off of ion exchange resins through bioregeneration are disclosed. The improved systems and methods rely upon direct contact between the resin and a liquid product containing enrich... | 08/05/2008 |
| 7390410 | Method and apparatus for the anaerobic treatment of waste A method and apparatus for the anaerobic treatment of waste water is described which includes a plug flow bioreactor containing a single bed of inert microbial attachment media and anaerobic microorganisms, and having at least one baffle member which forms a first z... | 06/24/2008 |
| 7378022 | System and methods for biological selenium removal from water A biological system for removing selenium from waste water comprises a first immobilized cell bioreactor (ICB) and a selenide removal module. The first ICB comprises a chamber having a substrate housed therein and situated to contact the waste water flowing therethr... | 05/27/2008 |
| 7378021 | Tidal vertical flow wastewater treatment system and method A wastewater treatment system includes a tidal, sequential vertical flow marsh cell system having at least three marsh cells in serial forward fluid communication. Incoming wastewater to be treated is channeled to at least the first and a second marsh cell, and a po... | 05/27/2008 |
| 7374683 | Biofilter and method for filtering a waste liquid The biofilter is used for the purification of a waste liquid using layers of filtering material, wherein the waste liquid moves downwardly by gravity while an O2-containing gas moves upwardly therein. The biofilter comprises a gas collector to capture at ... | 05/20/2008 |
| 7363878 | Waste extraction system A waste extraction system (10) for an aquaculture tank (12) includes a first conduit (18) having a first end (20) and a distant second end, with a second conduit (22) disposed within the conduit (18). The second conduit (... | 04/29/2008 |
| 7347940 | Nitrogen removal system and method for wastewater treatment lagoons A wastewater treatment process integrates a tidal nitration system with a wastewater treatment lagoon. Raw effluent enters a lagoon having a persistent anoxic or anaerobic state and a long residence time to permit suspended solids to settle to the bottom, forming a ... | 03/25/2008 |
| 7344644 | Method and system for purifying water The disclosed methods and systems of water purification relate to burying an underdrain in situ under a filter media bed such as a particulate material bed, within a natural body of water. A pump is provided for withdrawing water from the underdrain at a sufficient ... | 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 |
| 7334415 | Cooling system and method for using cooling system A cooling system is provided having a first heat exchanger for heating a cooling liquid, a second heat exchanger, which preferably comprises an evaporator, for cooling the cooling liquid, and a pump for guiding the cooling liquid through the first and second heat ex... | 02/26/2008 |
| 7335303 | Zero-discharge of water glass effluents by alkaline biotreatment techniques The present invention relates to the collection of alkalophilic/alkaline-tolerant microbes and use of said microbes in water glass wastewater treatment. The wastewater is treated directly with alkalophilic/alkaline-tolerant microbes cultured on granular activated ca... | 02/26/2008 |
| 7332095 | Wet oxidation An oxidation process is described which involves subjecting a feedstock which contains oxidizable material to temperature, pressure and contact with an oxidant. Excess water and volatile oxidation products, such as carbon dioxide, formic acid and acetic acid, are re... | 02/19/2008 |
| 7332084 | Process for biological treatment of organic wastewater and apparatus therefor A multistage activated sludge process involving a predation effect caused by microorganisms realizes further improvement in treatment efficiency and further decrease in the amount of excess sludge generated while a stable quality of the treated water is maintained. ... | 02/19/2008 |
| 7329350 | Filtration system A filtration system comprises a filtration container housing filter media treated to reduce waste in water pumped into the filtration container. An impeller is mounted on the filtration container and forces water and filter media within the container to move within ... | 02/12/2008 |
| 7326344 | Process for the removal of metals by biosorption from mining or industrial effluents A method and a plant to remove metals by biosorption from mining or industrial effluents comprising: (a) subject the effluent to at least one first stage of pre-treatment, selecting among: precipitation by pH rising, solvent extraction or solvent extraction on emuls... | 02/05/2008 |
| 7326345 | Bioremediation method which is used to concentrate and eliminate radionuclides in radioactive water A method for concentrating and eliminating radionuclides from water from in nuclear pools based on the capacity of microorganisms when they are growing to retain radionuclides by forming biofilms on the colonized surfaces. The method of the invention utilizes the co... | 02/05/2008 |
| 7323107 | Apparatus and method for the treatment of waste A waste treatment system suitable for domestic use and capable of producing water suitable for recycling within the household. The system includes a bioreactor (30) and a decomposition chamber (16). The bioreactor (30) is adapted to digest liqui... | 01/29/2008 |
| 7320752 | Integrated hydroponic and wetland wastewater treatment systems and associated methods The wastewater treatment systems have a plurality of treatment modules between the inlet and the outlet, each for treating water with a selected process. Influent is directed to a covered anaerobic reactor, and then to an attached growth pretreatment filter that is ... | 01/22/2008 |
| 7318895 | Biodestruction of blended residual oxidants The present invention may be used for treatment of waste streams using domestic wastewater. A concentrate waste stream containing one or more of perchlorate, nitrate, bromate, selenate and chromate may be combined with a domestic wastewater stream. The concentrate w... | 01/15/2008 |
| 7316776 | Aquarium filtration system with bio-reactor An improved aquarium filtration system is provided which includes a bio-reactor chamber. The bio-reactor chamber includes a plurality of bio-balls which have a high surface area for collecting bacteria for biological filtration. The bio-reactor includes one or more ... | 01/08/2008 |
| 7311835 | Method for supplying oxygen to a water purification process The present invention relates to a method for supplying oxygen to a water purification process, said method comprising providing an oxygen carrier of at least one copolymer of dimethylsiloxane, ethylene oxide and propylene oxide, adding said oxygen carrier to the wa... | 12/25/2007 |
| 7311839 | Removal of biological pathogens using surfactant-modified zeolite Systems and methods are described for removing biological pathogens using surfactant-modified zeolite (SMZ). A method for removing biological pathogens from a fluid or a fluid-based gel includes filtering the fluid or fluid-based gel using SMZs. A method for removin... | 12/25/2007 |
| 7309434 | Apparatus and method for wastewater treatment A method for treating wastewater. The method comprises: providing a first dose of air to aerate a medium bed; supplying a dose of wastewater to the aerated medium bed; allowing nitrification of the wastewater to occur; allowing denitrification to occur; and providin... | 12/18/2007 |
