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| Number | Title | Issue Date |
| 5006249 | Anaerobic waste water treating process Waste water comprising organic pollutants, a Group II A metal component and a high concentration of an alkali metal component, such as produced water, is treated with an acclimated biomass of anaerobic microorganisms to decompose the organic pollutants to... | 04/09/1991 |
| 4997568 | Process and apparatus for a biological reactor to purify water A system and method to remove pathogenic organisms and other suspended and dissolved containments from sewage or other contaminated water by an inexpensive, nearly maintenance free device. Principles of operation include new effective methods whioch combi... | 03/05/1991 |
| 4995980 | System for biological purification of water containing organic materials and derivative products The treatment of water by a biological technique. The water to be treated circulates in the interior of the reactor, in the space (2) located above the partition (1). It is aerated and agitated by a diffuser (3); it enters the reactor by the opening (4) a... | 02/26/1991 |
| 4990449 | Compost-containing cartridge for biological regeneration of an aquatic medium A cartridge for biological regeneration of an aquatic medium such as an aquarium is prepared by providing a receptacle containing an organic compost, and having means for allowing passage of water into the receptacle, through the compost and out of the re... | 02/05/1991 |
| 4983299 | Removal of phenols from waste water by a fixed bed reactor A porous biomass support system in a fixed bed reactor configuration affords biodegradation of phenolic materials to a level under 20 parts per billion at an hydraulic residence time of about 15 hours with significantly less sludge formation currently pos... | 01/08/1991 |
| 4976864 | Treatment of the effluents from the production of epoxy resins Process for the treatment of aqueous effluents from the production of epoxy resins, which effluents contain as their main impurities chlorohydrins, glycidol, isopropyl alcohol and sodium chloride, which process comprises the following steps: (a) hydrolyti... | 12/11/1990 |
| 4975196 | Cyclic, multi-stage biological process for wastewater treatment A method for anaerobic biological waste treatment in multiple stages wherein a relatively high strength wastewater is introduced into a first biological reactor to produce an effluent of reduced strength, the effluent is passed into a second biological re... | 12/04/1990 |
| 4968427 | Process for the biological degradation of complex, non-readily degradable organic wastewater constituents In a two-stage process for the biological degradation of complex, non-readily degradable wastewater constituents, acidification takes place in the first stage and anaerobic degradation in the presence of methanogenic organisms in the second stage. In the ... | 11/06/1990 |
| 4966704 | Anaerobic process for microbiological purification of sulphur-containing water A two-step process for microbiological purification of contaminated water, comprising a first step using anaerobic conditions in a reactor having a stationary bed and a biofilm fixed thereon followed by conventional microbiological purification, character... | 10/30/1990 |
| 4954257 | Biological purification loop device and method having deflector plate within guide pipe The present invention relates to a reactor for biological purification of pollutant-containing water in a closed vessel by means of loop operation. This vessel contains, disposed vertically and concentrically with respect to its jacket and to each other, ... | 09/04/1990 |
| 4954259 | Process for the treatment and purification of water by the flocculation of suspended particles in a fluidized bed The invention involves a process for the flocculation of matter suspended in water. According to the invention, the water is passed through a granular medium in a fluidized bed, without prior saturation of the granular medium in a fixed bed, and flocculat... | 09/04/1990 |
| 4940546 | Installation for aerobic biological purification of pollutant-containing water The invention relates to an installation for aerobic biological purification of pollutant-containing water, which installation consists of an axial-flow submerged reactor and a sedimentation tank for separation of the biosludge from the purified water. Th... | 07/10/1990 |
| 4931183 | Process and apparatus for the biological purification of water In a process and apparatus for the biological purification of water by means of a closed percolating filter operated with pure oxygen and/or air, and an upward-flow filter disposed downstream of the percolating filter, with flotation filter material there... | 06/05/1990 |
| 4925552 | Arrangement for water purification An arrangement for operation to reduce organic contaminant concentration in water passing therethrough as provided. The arrangement includes at least one reactor comprising a plurality of treatment chambers oriented in series, each chamber including an up... | 05/15/1990 |
| 4921604 | Upflow biological reator waste water treatment system Improvements to an upflow biological reactor (UBR) waste water treatment system include preoxygenating the waste water in a separate vessel before submitting the preoxygenated waste to the biological reaction tower. A unique distribution means is describe... | 05/01/1990 |
| 4915842 | Simple system to decompose pesticide waste water A hybrid chemical/biological process which is highly effective to destroy the herbicide, Atrazine, in wasterwater solutions is herein disclosed. The process comprises subjecting the atrazine molecule in an aqueous carrier to ozone to produce the oxidized ... | 04/10/1990 |
| 4915841 | Process for the biological purification of waste waters Process for the psychrophilic biological purification of waste waters having medium-low concentrations of polluting substances. The process comprises a first anaerobic treatment step with an expanded mud bed of U.A.S.B. type at a low flow rate, a second t... | 04/10/1990 |
| 4908129 | Impervious layer formation process and landfill adsorption system An arrangement for retaining harmful substances contained in water seeping from a waste dumping ground body includes an impervious layer of mineral sealing materials, such as clay, with an adjacent adsorption layer containing materials capable of binding ... | 03/13/1990 |
| 4904386 | Method of purifying liquids like wastewater by means of a filter bed containing aquatic plants planted in such filter bed The filter bed containing aquatic plants planted therein is provided with a lengthwise and/or transverse drainage arrangement containing a predetermined number of drain pipes. Particularly during the growth phase of the aquatic plants, the drainage arrang... | 02/27/1990 |
| 4892658 | Wastewater treatment system A system for the environmentally-safe, unified treatment of a wastewater effluent is disclosed in which there is provided: a primary treatment component comprising at least one means for the removal of solids, a secondary treatment component comprising at leas... | 01/09/1990 |
| 4883594 | Flooded biological film reactor for water treatment, with gas charging via a membrane The support material (27) in the reactor is uniformly subjected, over the height of the reactor bed, to a gas flow ensuring supply and evacuation. The biological film reactor (22) can be fed with oxygen, hydrogen and/or carbon dioxide. The reactor (22) is... | 11/28/1989 |
| 4882058 | Organic waste recycling system and method System and method for converting and recycling liquid borne organic waste materials from a processing plant. The waste material is passed through a compost bed containing a fecal material which treats the organic waste biologically, removes liquid from th... | 11/21/1989 |
| 4880542 | Biofilter for the treatment of sour water A process for oxidizing the sulfide (H2 S, HS-, S-2) in sour water to convert the sulfide to sulfate by producing a sulfide tolerant strain of Thiobacillus denitrificans and then co-immobilizing the T. denitrificans and Ca... | 11/14/1989 |
| 4839053 | Biomass growth process with separate aeration and media compartments A process and an apparatus is provided for growing biomass from a supply of nutrient in a manner which permits precise control of the biomass growth environment. A reaction vessel includes a media-free compartment and a media compartment which retains bio... | 06/13/1989 |
| 4833083 | Packed bed bioreactor A bioreactor for anchorage or nonanchorage dependent cells or for immobilized enzymes that is capable of achieving high cell densities or concentrations of reaction products is disclosed. The bioreactor is capable of being easily scaled up. The bioreactor... | 05/23/1989 |
| 4832847 | Process for activated-sludge treatment of sewage or industrial waste water A fluidized-bed type activated-sludge treatment of sewage or industrial waste water characterized in that a fine powder of a granulated blast furnace slag is added to an aeration tank of the activated-sludge treatment installation to facilitate the treatm... | 05/23/1989 |
| 4832848 | Method of and apparatus for establishing and maintaining dispersions of liquid and gaseous fractions A dispersion of air or oxygen in liquid sewage and/or or sludge is admitted tangentially into the lower portion of an upright vessel wherein the dispersion rises and is compelled to flow through eccentric flow restricting passages in several superimposed ... | 05/23/1989 |
| 4826601 | Sewage treatment method A method of treating sewage is disclosed that is particularly suitable for one or a small group of residential dwellings in environmentally sensitive areas. The raw sewage is flowed first into an aerobic first cell where it is aerated and forced into a hi... | 05/02/1989 |
| 4818404 | Submerged biological wastewater treatment system This invention relates to a process and reactor system suitable for biological treatment of wastewaters or for other applications wherein effective and intimate contact between biological populations attached to a fixed surface and liquid born chemicals a... | 04/04/1989 |
| 4812237 | Water recycle system A closed water purification and recycle system processes domestic wastewater to produce potable water for cooking, drinking and dishwashing and water suitable for general household use, such as washing clothes and personal hygiene. The system consists of ... | 03/14/1989 |
| 4801336 | Process for accelerating the transfer of media in a fluidized bed A method for accelerating the transfer of media between materials reacting in a fluidized bed in a centrifuge. The rotating fluidized bed increases the relative boundary layer velocities of the phases and assists in the transfer of material across the int... | 01/31/1989 |
| 4793929 | Method for the purification of sewage waters With the method for the purification of sewage waters, in a first purification stage favorable conditions (pH, suspended matter) for the growth of ubiquiteous nitric bacteria are adjusted, whereby the loads of ammonia are to the major extent converted to ... | 12/27/1988 |
| 4758344 | Method for treating organic garbage, especially household refuse Organic waste, especially organic household garbage, is leached in a leaching apparatus for washing out any water soluble organic substances and water soluble heavy metal salts. Air is supplied into the apparatus during the leaching for aerobically decomp... | 07/19/1988 |
| 4756831 | Process and apparatus for removal of nitrate from surface and ground water, in particular drinking water Process for recovering nitrate from surface and ground water, in particular drinking water, by means of biological denitrification, in which the nitrates contained in the water are reduced to gaseous nitrogen in a reactor by means of a biocatalyst having ... | 07/12/1988 |
| 4755304 | Method of purifying ground water A process for the purification of ground water is disclosed which comprises injecting conditioned water into a recharge well, simultaneously withdrawing water from an adjacent recharge well in order to create a purification zone therebetween, and withdraw... | 07/05/1988 |
| 4749493 | Method and apparatus for oxygenating water A method and apparatus for oxygenating water in an aquaculture system without adding nitrogen or other possibly harmful gases. A columnar housing floats in the aquaculture pond on a float ring with a submersible pump immersed in the pond. The pump draws i... | 06/07/1988 |
| 4746433 | Process for the anaerobic treatment of organic substrates A process for the anaerobic treatment of organic substrates is disclosed. The substrate to be treated is mixed with biomass, then passed through a bed of filler bodies and sludge, and also, after separation of the gas formed, is introduced into a distribu... | 05/24/1988 |
| 4743376 | Water purification by a fluidized bed The invention involves a process for the flocculation of matter suspended in water. According to the invention, the water is passed through a granular medium in a fluidized bed, without prior saturation of the granular medium in a fixed bed, and flocculat... | 05/10/1988 |
| 4735723 | Anaerobic purification of waste water containing sulfate and organic material Waste water containing sulfate and organic material is purified by anaerobic biological waste water treatment where at least 80% of the sulfate is converted into hydrogen sulfide in an acidification process and at least 70% of the resulting hydrogen sulfi... | 04/05/1988 |
| 4735724 | Solids concentrating anaerobic digestion process and apparatus A non-mixed vertical tower anaerobic digester and anaerobic digestion process provides passive concentration of biodegradable feed solids and microorganisms in an upper portion of a continuous digester volume and effluent withdrawal from the middle to bot... | 04/05/1988 |
