| Patents for C02F 3 - Biological treatment of water, waste water, or sewage (46,453) |
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| 05/06/1992 | EP0483290A1 Immersible biological filter for the purification of waste water. |
| 05/05/1992 | US5110744 Amine system energy savings; waste treatment system control improvements |
| 05/05/1992 | US5110465 Compact waste water treatment facility |
| 05/05/1992 | US5110464 Apparatus for recirculation of liquids |
| 05/05/1992 | US5110459 Septage anaerobic treatment batch processing |
| 05/05/1992 | CA1300285C Air-driven contact filter |
| 05/01/1992 | WO1992007796A1 Method of fractionizing water molecule cluster, water-soluble mineral containing solution used for this fractionizing method and method of producing the mineral containing solution |
| 04/30/1992 | WO1992006585A1 Means and method for enhancing plant growth under field conditions |
| 04/30/1992 | DE4033814A1 Aeration device esp. for waste water - has stable connection between aeration tube and air supply pipe |
| 04/30/1992 | DE4033167A1 Positioning aeration assembly in tank - e.g. in clarification tank, using guide ropes attached at spaced points and passing through guide elements at tank bottom |
| 04/30/1992 | CA2094606A1 Means and method for enhancing plant growth under field conditions |
| 04/29/1992 | EP0482332A1 Process for injecting compressed air into a liquid |
| 04/29/1992 | CN2102925U High-concentration organic waste water aerobic treating device |
| 04/28/1992 | CA1299778C Method and system for enriching oxygen content of water |
| 04/25/1992 | CA2028497A1 Composition for chemical and biological treatment of polluted water, and preparation process therefor |
| 04/23/1992 | DE4102966C1 Process for breaking down emulsified hydrocarbon in water - using anaerobes in reactor, producing water-poor and water-rich phase, where floating and non-floating low water phase are recycled etc. |
| 04/22/1992 | EP0481963A2 Microorganisms for degrading toxic waste materials |
| 04/22/1992 | CN2102291U Biological rotary disk |
| 04/22/1992 | CN1060453A Aeration of liquids |
| 04/21/1992 | US5106511 On-line biological inhibition/toxicity detector |
| 04/21/1992 | US5106504 Artificial open water structures |
| 04/21/1992 | US5106496 Treatment of volatile organic substances at waste water treatment plants |
| 04/18/1992 | CA2027798A1 G.ent. septic vent |
| 04/16/1992 | WO1992006043A1 Process for removal of organic pollutants from waste water |
| 04/15/1992 | EP0480325A1 Method for determining the chemical oxygen demand (cod) |
| 04/15/1992 | CN2101669U Oxygen enhancing aeration device with floating vane |
| 04/15/1992 | CN1016244B Anaerobic digestion system |
| 04/14/1992 | US5104716 Contact material |
| 04/14/1992 | US5104542 Dual chamber sewage treatment system |
| 04/14/1992 | US5104528 Floating decanter |
| 04/14/1992 | US5104233 Mixing element with a tapered porous body |
| 04/14/1992 | US5103864 Liquid distribution systems |
| 04/14/1992 | CA1298801C Method of controlling the composition of a stable microbial mixed biocenosis |
| 04/14/1992 | CA1298798C Microorganisms for degrading toxic waste materials |
| 04/09/1992 | DE4130492A1 Bio-reactor esp. for waste water treatment - has separate compressed gas and reaction gas inlets |
| 04/09/1992 | DE4031292A1 Clarification plant of modular design - for biological waste water purification, using jointless, tension-free circular steel-reinforced concrete tanks of same internal dia. |
| 04/09/1992 | DE4031069A1 Agent for nitrification or denitrification of liq., esp. water - contg. salt of tri:valent or tetra:valent metal, esp. iron@, aluminium@ or cerium@, and opt. cationic (co)polymer |
| 04/08/1992 | EP0479742A1 Air intake supressor |
| 04/07/1992 | US5102548 Pretreatment of high biological oxygen demand wastes prior to treatment by municipal waste treatment facility |
| 04/07/1992 | US5101849 Baffle for a sewage tank and method of installation |
| 04/06/1992 | CA2052190A1 Anaerobic digester |
| 04/02/1992 | WO1992005117A1 Process for purifying water |
| 04/02/1992 | WO1992004972A1 Venting nozzle for liquids containing organic substances |
| 04/02/1992 | DE4030668A1 Appts. for redn. of vol. of biological sludge - has cell structure of sludge is broken down by mechanicaldisintegrator and resulting material is subjected to further biological treatment |
| 04/02/1992 | DE4030488A1 Verfahren zur wasserreinigung Method for water purification |
| 04/02/1992 | DE4030376A1 Filtration system for waste water - biological filter in which water passes downward through filter bed has distributor which oxygen bubbles upward through bed |
| 04/01/1992 | EP0478408A1 Improved reactor for biological treatment of waste water |
| 04/01/1992 | EP0478097A1 Process for the preparation of biocatalysts |
| 04/01/1992 | EP0477831A1 Liquid purification apparatus and method of purification |
| 04/01/1992 | EP0477338A1 Process for the treatment of water containing sulphur compounds. |
| 03/31/1992 | US5100800 Microorganism for degrading toxic waste materials |
| 03/31/1992 | US5100553 Method for treating organic waste by methane fermentation |
| 03/31/1992 | US5100455 Mixing composted material with hydrocarbon or chlorohydrocarbon contaminated material and allowing microbes to destroy the hydrocarbons |
| 03/31/1992 | CA1298418C Sewage-water purifying process |
| 03/26/1992 | DE4029982A1 Belueftungsduese zum belueften von organische substanzen enthaltenden fluessigkeiten Blower nozzle for aerating liquids of organic substances containing |
| 03/25/1992 | CN2099759U New type high granulity filler for fluidized bed treatment of sewage organisms |
| 03/24/1992 | US5098572 Method and apparatus for increasing sludge concentration in water purification installations |
| 03/24/1992 | US5098567 Waste water treating process |
| 03/19/1992 | WO1992004285A1 Biological treatment method and apparatus including denitrification for waste water |
| 03/18/1992 | EP0475542A1 Process and apparatus for removing heavy metals from aqueous media by means of a bioadsorber |
| 03/18/1992 | EP0475541A1 Process for biological decomposition of recalcitrant organic compounds |
| 03/18/1992 | EP0475540A1 Process and apparatus for removing ammonium, nitrite and/or nitrate from water |
| 03/18/1992 | EP0474895A1 Process for anaerobic treatment of waste water |
| 03/18/1992 | EP0474702A1 Wastewater treatment. |
| 03/18/1992 | EP0367799B1 Device for dispersing gas within a liquid phase |
| 03/18/1992 | CN1015891B Method for partially purifying water in continous waters |
| 03/18/1992 | CN1015889B Process for biological purification of waste water from methanol |
| 03/18/1992 | CN1015888B Hydrolyzing-oxybiotic treatment of nunicipal drainage |
| 03/18/1992 | CN1015887B Purifying process for waste waater |
| 03/18/1992 | CN1015886B Gas breaking out device and treating method for organisms containing oxygen |
| 03/18/1992 | CN1015885B Devices of sewage treatment |
| 03/17/1992 | US5096814 Formed by sintering a mixture of sinterable and nonsinterable substance which is separated by dissolving; waste water treatment |
| 03/17/1992 | US5096588 Method and system for optimizing the operation of a trickling filter |
| 03/17/1992 | US5096579 Anaerobic digester |
| 03/17/1992 | US5096577 Floating aquatic plant water treatment system |
| 03/17/1992 | CA1297443C Biological degradation of chemicals bearing an oxydibenzene nucleus |
| 03/12/1992 | DE4028312A1 Compsn. for denitrifying water - comprises matrix enclosing heterotrophic denitrification agent and unleachable substrate |
| 03/11/1992 | EP0474325A1 Process and apparatus for anaerobic biological purification of water polluted with organic compounds |
| 03/11/1992 | EP0474296A1 Apparatus for the purification of waste water |
| 03/11/1992 | CN1059331A Method for deodorising dung and urine of breeding animals |
| 03/11/1992 | CN1059322A Alkaliferous industrial waste water and waste slag treatment method |
| 03/10/1992 | US5094946 Enzymatic processing of materials containing chromium and protein |
| 03/10/1992 | US5094752 Aerobic wastewater treatment with alkalinity control |
| 03/10/1992 | CA1297213C Process and apparatus for wastewater treatment |
| 03/08/1992 | WO1992004284A1 Method for purification of wastewater |
| 03/08/1992 | CA2050697A1 Apparatus for the purification of waste water |
| 03/05/1992 | WO1992003386A1 Multi-step biological sewage treatment plant |
| 03/05/1992 | WO1992003220A1 Aeration apparatus with draft tube |
| 03/05/1992 | WO1992003219A1 Aeration apparatus with diffuser |
| 03/05/1992 | DE4128725A1 Aerating appts. for fluids, esp. waste water - comprises reservoir with dividing wall, aerating channel on one side of wall near base and contg. aerators with porous elements |
| 03/05/1992 | CA2047379A1 Floatation separation system |
| 03/04/1992 | EP0473055A1 Immobilized enzime catalyzed removal of aromatic compounds from aqueous solutions |
| 03/04/1992 | CN2097832U Rope net type fibre stuffing |
| 03/03/1992 | US5093047 Gas diffuser |
| 03/03/1992 | CA1296820C Waste water treatment process |
| 03/03/1992 | CA1296819C All-purpose septic tank |
| 03/01/1992 | CA2049215A1 Immobilized enzyme catalyzed removal of aromatic compounds from aqueous solutions |
| 02/28/1992 | WO1992003218A1 Aeration of liquids |
| 02/28/1992 | CA2090619A1 Aeration of liquids |
| 02/27/1992 | DE4122723A1 Thermostable biological waste water treatment device for tanneries - for aerobic and aerobic treatment in sealed rotating containers for recovering evolved gases and removing solid waste organic impurities |