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| Number | Title | Issue Date |
| 5874001 | Ground water remediation method A method and apparatus for in situ removal of biodegradable contaminants from ground water or soil , or both by injecting oxygen gas into ground water containing a biodegradable contaminant in a volume low enough to avoid migration or volatilization of th... | 02/23/1999 |
| 5866003 | Apparatus for degrading pollutant, process for purifying contaminated medium and process for degrading pollutant An apparatus for degrading a pollutant to purify a medium containing a pollutant using a microorganism, which comprises a container in which a region containing a microorganism capable of degrading the pollutant is provided, wherein the container has the ... | 02/02/1999 |
| 5851399 | Process and arrangement for biodegrading pollutants in water The process serves for treating water polluted with pollutants which can only be degraded with difficulty by purely biological means. The water is circulated through a reactor vessel arrangement (24) in which it is treated with ozone which causes a prelim... | 12/22/1998 |
| 5811011 | Biological treatment of wastewater In the embodiments of the invention described in the specification, an arrangement for biological treatment of wastewater includes a basin with an aeration region and a clarification region separated by a movable wall having a passage between the bottom o... | 09/22/1998 |
| 5807485 | Shipboard fixed-bed bioreactor system Disclosed is an apparatus and method for the continuous biological treatment of ship bilge water contaminated with petroleum and biodegradable materials. The apparatus includes a pumping system attached directly to the bilge or to an oil-water phase separ... | 09/15/1998 |
| 5804076 | Method for treatment of waste water and/or exhaust gases containing flourine and surface active agents A first reaction/adjustment tank has a lower portion containing a calcium carbonate mineral, an upper portion containing a calcium carbonate mineral and a plastic filler, and an air lift pump for circulating waste water from the lower portion to the upper... | 09/08/1998 |
| 5795481 | Process for the treatment of aqueous effluents on biofilters or other devices making use of fixed cultures A process for the treatment of aqueous effluent with a view to its purification, the process including at least one stage consisting of causing the water to pass into the interior of at least one battery of several biological filters with fixed cultures o... | 08/18/1998 |
| 5788843 | Method and installation for treating water A structure for treating water used in public water supplies for removing dissolved gases. The installation includes a closed outer tank for storage of water and a vented inner tank for water aeration contained at least partially within the outer tank. Th... | 08/04/1998 |
| 5788841 | Method for improving wastewater treatment A method of treating wastewater prior to being processed within a wastewater treatment facility is provided, wherein the wastewater is delivered to the wastewater treatment facility by a collection piping system having an interior surface, and wherein the... | 08/04/1998 |
| 5785854 | Current and aeration system for wastewater plant A defined current and aeration system for the aeration chamber of an aerobic wastewater treatment plant is disclosed. It includes the release of oxygenation gas or air into the aeration chamber through a diffuser or the like at a position such that the ai... | 07/28/1998 |
| 5770081 | Apparatus for and method of reducing solids and controlling surges in the flow of effluent from a wastewater treatment plant Apparatus for and a method of reducing solids and controlling surges in the flow of effluent from the clarifier chamber of an aerobic wastewater treatment plant. The apparatus is mounted inside the clarifier chamber of the wastewater treatment plant and c... | 06/23/1998 |
| 5766490 | Oxygenating apparatus, method for oxygenating water therewith, and applications thereof A process for enriching water with oxygen, wherein water is conducted through a water inlet into a sealed enriching space and through one or more turbulent mixers in the enriching space, oxygen is introduced through an oxygen inlet into the water in the e... | 06/16/1998 |
| 5747311 | Process for chemical modification of reactants by microbes The present invention relates to a method for chemically modifying a reactant using microbes. The method includes providing a particulate material which includes a plastic carrier and microbes attached to the carrier. The particulate material is dispersed... | 05/05/1998 |
| 5744037 | Method of treating foul water In an improved method of treating foul water, the solids that are produced during the process of treatment of foul water such as wastewater or liquid sludges are treated with a heat treatment apparatus and the resulting thermal energy and/or gas is utiliz... | 04/28/1998 |
| 5736049 | Method and means for odor control in waste water lagoons A method for controlling odor in a waste water lagoon comprises the steps of aerating a top horizontal layer of a lagoon adjacent its upper surface at a depth of approximately 12 to 24 inches by introducing air through a plurality of nozzles submerged in ... | 04/07/1998 |
| 5728300 | Phytorecovery of metals using seedlings Methods and systems for alleviating the environmental and health hazards associated with environmental contamination by metals are provided. Contained living or non-viable biomasses of metal-accumulating plant seedlings deplete the metal elements and comp... | 03/17/1998 |
| 5702951 | Continuous RBCOD measurement The invention provides a method and apparatus for providing periodical measurements of the real-time readily biodegradable chemical oxygen demand (RBCOD) of a wastewater stream. The apparatus includes a bio-reactor having an inlet for accepting a feed fro... | 12/30/1997 |
| 5698412 | Method for monitoring and controlling biological activity in fluids A method of monitoring a microbiological process in a fluid supply involving isolation of a fluid sample from a fluid supply, measuring the pH of the fluid sample at selected time intervals, then analyzing changes in pH, if any, to determine a pH producti... | 12/16/1997 |
| 5650070 | Aerobic long vertical shaft bioreactors An improved biomass waste treatment process wherein an aerobic biological reaction takes place in a vertical chamber having a first portion defining a first zone and a second portion defining a second zone below said first zone, said process comprising fe... | 07/22/1997 |
| 5643454 | Sewage respiration inhibition A method is provided for treating sewage by introducing carbon dioxide and oxygen therein so that the carbon dioxide reduces the pH of the sewage to about pH5.0 or below and reduces the activity of bacteria therein such that the oxygen can oxygenate the s... | 07/01/1997 |
| 5626755 | Method and apparatus for waste digestion using multiple biological processes Methods and apparatus for treating waste streams utilize controlled introduction of microscopic gaseous bubbles to create, in a single vessel, as many as three separate biological environments in discrete, stratified zones. In preferred embodiments, bubbl... | 05/06/1997 |
| 5624565 | Method of Regulating Aeration in a basin for bilogical treatment of wastewater A method of regulating aeration in biological treatment of wastewater by implementing a step of eliminating carbon in aerobiosis, a step of nitrification in aerobiosis, and a step of denitrification in an anoxia, in which method the oxidation-reduction po... | 04/29/1997 |
| 5585001 | Waste water treatment method employing a continuous respiration meter and an apparatus thereof Disclosed herein is a method for treating a waste water comprising a high concentration of organic substances in a stable and controllable manner and an apparatus therefor. The method comprises the steps of determining continuously a dissolved oxygen(DO) ... | 12/17/1996 |
| 5578211 | Wastewater gas reduction method A method of reducing undesirable gases in a wastewater collection piping system is provided, comprising the introduction of select microbes into the piping system at a frequency corresponding to the pumping activity of the pumping stations, and in an amou... | 11/26/1996 |
| 5571417 | Method for treating photolithographic developer and stripper waste streams containing resist or solder mask and gamma butyrolactone or benzyl alcohol A method is disclosed for using the simple, environmentally-friendly organic compounds gamma-butyrolactone and benzyl alcohol to develop and to strip free radical-initiated, addition polymerizable resists, cationically cured resists and solder masks and V... | 11/05/1996 |
| 5567325 | Thermophilic digestion of chitin-containing waste Processes are provided for the thermophilic digestion (55° C. to 65° C.) of chitinous wastes to produce a solubilized form of chitin that may be applied to plants to stimulate their resistance to disease and attack by insects and fungi. Also provided ar... | 10/22/1996 |
| 5549828 | Method and apparatus for in Situ water purification including sludge reduction within water bodies by biofiltration and for hypolimnetic aeration of lakes A method and an apparatus for in situ purification by aeration and biofiltration of water from a water body. According to this method, polluted and/or oxygen deficient water is drawn through a conduit into a submerged chamber held adjacent to the surface ... | 08/27/1996 |
| 5545327 | Wastewater treatment method and apparatus A method and apparatus for treatment of biodegradable waste products. The influent is aerated and directed through a fixed media assembly to promote intimate surface contact and cause microbial growth. The fixed media assembly comprises a stack of spaced ... | 08/13/1996 |
| 5531894 | Method of treating wastewater A method of improving the quality of septic tank effluent is disclosed. Sewage wastewater having a significant concentration of waste solids is flowed to a septic tank. In the septic tank the solids are allowed to separate from the wastewater to form a re... | 07/02/1996 |
| 5527465 | Method for preventing erosion in headworks of waste water treatment facilities A method of removing noxious odors and preventing erosion within waste water headworks, said headworks including a headworks structure for waste water, an inlet line, an outlet line and a vent line; a method of removing noxious odors and preventing erosio... | 06/18/1996 |
| 5525231 | Method of operating a sequencing batch reactor A method of operating a sequencing batch reactor having a cycle consisting of FILL, REACT, SETTLE and DRAW periods and optionally an IDLE period, wherein supply of feed to the sequencing batch reactor comprises distributing the feed into settled sludge in... | 06/11/1996 |
| 5510032 | Process for treating aqueous solutions containing industrial wastes A treatment zone 10 in the form of a basin 12 having an inlet port 14 and an outlet port 16. The inlet port 14 allows water to flow into the basin 12. The outlet port 16 allows water to flow out of the basin 12. The inlet port 14 and the outlet port 16 ar... | 04/23/1996 |
| 5496729 | Process for the desulfurization and the desalting of a fossil fuel This invention relates to an integrated method for the desulfurization and desalting of a fossil fuel, comprising the steps of: (a) contacting a fossil fuel with; (i) a sufficient amount of an aqueous solution capable of depleting the fossil fuel of forms... | 03/05/1996 |
| 5490935 | Method for treating wastewater An apparatus and method for treating wastewater is provided including a cylindrical tank having a sidewall, a bottom, an upper portion and a lower portion; a hopper positioned within the tank, the hopper having sides, an upper opening located in the upper... | 02/13/1996 |
| 5474934 | Biodegradation of ethers Ethers including dioxanes are degraded by bringing an ether-containing influent into intimate contact, under growth or resting conditions and in the presence of oxygen, with a culture comprising a bacterium having the characterizing microbiological proper... | 12/12/1995 |
| 5468392 | Submerged fixed-film biological waste treatment method and system Apparatus and method for controlling the positioning of substrates for supporting bacteria in a waste treatment container use an aerator manifold which supplies bubbles of gas to the container from adjacent the bottom of the container. A hollow open mesh ... | 11/21/1995 |
| 5468391 | Sludge flight support rail assembly In a sludge collector mechanism having a sludge flight for scraping settled sludge off the bottom of a settling tank and skimming floating waste from the surface of the water contained in the tank, a support rail assembly for maintaining the flight on a l... | 11/21/1995 |
| 5459229 | By product stream purification in the preparation of 1,3-propanediol-based polyesters A process for preparing a 1,3-propanediol-based polyester comprises contacting an aqueous stream containing acrolein byproduct with a base for a time effective to reduce the acrolein content of the aqueous stream. In a specific embodiment, a poly(propylen... | 10/17/1995 |
| 5453375 | Method and compositions for the degradation of tributyl phosphate in chemical waste mixtures A method and process for the degradation of tributyl phosphate in an organic waste mixture and a biologically pure, novel bacteria culture for accomplishing the same. A newly-discovered bacteria (a strain of Acinetobacter sp. ATCC 55587) is provided which... | 09/26/1995 |
| 5441641 | Process for removing manganese from solutions including aqueous industrial waste A process is provided for reducing the concentration of water soluble ionic manganese species in aqueous waste solutions containing the same. The process comprises passing said waste solution through a treatment zone containing a porous matrix on which ar... | 08/15/1995 |
