| Patents for C02F 11 - Treatment of sludge; Devices therefor (21,423) |
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| 09/25/1991 | CN1014046B Improvement of anaerobic ferment devices and methods |
| 09/24/1991 | US5051191 Method to detoxify sewage sludge |
| 09/24/1991 | US5051031 Fly ash or fluidized bed combustion residue mixed with sludge, storage to remove pathogens |
| 09/24/1991 | US5050511 Reduction of organic waste,transferring and cooling, condensation followed by recycling |
| 09/24/1991 | US5050375 Combustion of aqueous slurry of solid fuel for driving gas turbines, pressurization and combustion |
| 09/23/1991 | WO1991014657A1 Process and installation for purifying waste water |
| 09/23/1991 | CA2077685A1 Process and installation for purifying waste water |
| 09/19/1991 | WO1991013835A2 Methods for processing manure and a device therefor |
| 09/19/1991 | DE4008286A1 Mixing appts. for sewage sludge - comprises mixer with mill and two conveyors which feed the mill or both mill and mixer with sewage and dried sewage prod. |
| 09/19/1991 | DE4008285A1 Reaction tank for sludge treatment using air - comprises cross beams extending to tank floor and shallow longitudinal beams contg. gap between them and floor |
| 09/18/1991 | CN2084935U Self-circulation methane-generating pit with anaerobic sludge bed filter |
| 09/17/1991 | US5049248 Liquid separation process for suspensions by a pulsating electrical current |
| 09/17/1991 | CA1289275C Method for anaerobic treatment of high strength liquors |
| 09/17/1991 | CA1288952C Metal recovery process |
| 09/10/1991 | WO1991013667A1 Sludge treatment process |
| 09/10/1991 | US5047224 Method for treating organic waste material and an oxidation catalyst/cocatalyst composition useful therefor |
| 09/10/1991 | US5047153 Method for removing amine from solids |
| 09/07/1991 | WO1992011213A1 Processing waste solidification |
| 09/04/1991 | EP0445102A1 Minimal odour generating process for aerobic treatment of animal excrements |
| 09/03/1991 | CA1288531C Method for preventing the bulking of activated sludge |
| 08/28/1991 | EP0443385A2 Process and device for separating solids from mud with screw presses |
| 08/27/1991 | US5043081 Method of chemically fixing liquid aqueous sludge by means of a pozzolanic reaction |
| 08/27/1991 | CA1288179C Process and an apparatus for drying and conditioning chicken droppings and similar pasty substances |
| 08/22/1991 | WO1991012210A1 Cotreatment of sewage and steelworks wastes |
| 08/22/1991 | CA2010741A1 Method for treating sediment |
| 08/21/1991 | EP0441938A1 Process and installation for extracting fat and/or protein-containing material from fat-containing liquid material, in particular from slaughter deposits and waste. |
| 08/20/1991 | US5041216 Fluidized bed reactor for biological purification of effluent |
| 08/20/1991 | US5040900 Sludge stabilizing method and apparatus |
| 08/14/1991 | EP0441209A1 Method for the utilization of carbon black coming from synthesis gas production |
| 08/14/1991 | EP0440751A1 Process for drying and/or burning sludge |
| 08/14/1991 | CN1013499B Calcium sulfate powder for coatings |
| 08/08/1991 | WO1991011394A1 Process for oxidation of materials in water at supercritical temperatures |
| 08/08/1991 | DE4101230A1 Safe disposal of industrial waste water and sediment - by crystallising solid matter out of water, and adding germ former prior to freezing and thawing stages |
| 08/08/1991 | DE4101076A1 Pre-tipping redn. of liq. in sewage sludge - by applying electro-impulses from discharge condenser |
| 08/07/1991 | EP0439715A2 Apparatus for dewatering sludge |
| 08/07/1991 | EP0263859B1 Process for preparing filter dust, dredging sludge (harbour sludge) and similar waste matter for final disposal |
| 08/06/1991 | US5037561 Method for drying biological sludge |
| 08/06/1991 | US5037560 Sludge treatment process |
| 08/06/1991 | US5037559 Addition of flocculants; comparing signals with no-minal values; separatio of liquid from solids |
| 08/06/1991 | CA1287274C Combustion of aqueous sewage sludge by the fluidized bed process |
| 07/31/1991 | CN1013360B Process and device for anaerobic decomposition of organic substrate |
| 07/30/1991 | CA2035137A1 Apparatus for extracting water from sludges |
| 07/24/1991 | EP0437874A1 Method for reducing the leachability of granular material and granular material obtained using this method |
| 07/24/1991 | CN2081388U Miniature efficient methan-generating pit principal part structural piece |
| 07/24/1991 | CN2081387U Oil or water seal domestic methane-generating unit |
| 07/24/1991 | CN1013285B Integrate spherical hanging-poured method for building methane-generating pit |
| 07/23/1991 | US5034131 Heat treatment of wastes |
| 07/23/1991 | US5034111 Compressive and electro-osmotic dehydrator |
| 07/23/1991 | CA2008340A1 Process for aerobic enzymatic treatment of organic matter |
| 07/18/1991 | DE4000999A1 Facilitating unstable reaction at high temp.-pressure - by removing side stream for extra heating before return to main stream |
| 07/17/1991 | CN2080941U Manpower stirrer for methane-generating pit |
| 07/17/1991 | CN2080940U Tank type methane-generating pit for sequential fermentation |
| 07/16/1991 | US5032289 In situ off-shore processing of urban sewage without using or contaminating urban land |
| 07/16/1991 | CA1286448C Flocculating agents based upon copolymers of acrylamide and dimethylaminopropylacrylamide for use in dewatering sludge |
| 07/11/1991 | DE4000329A1 Solidification of farmyard slurry - with addn. of acids produced from sewage sludge to react with nitrogen cpds. |
| 07/09/1991 | US5030359 Dewatering sludge |
| 07/09/1991 | CA1286047C Water absorbing polymers |
| 07/04/1991 | DE3943416A1 De-watering very dilute materials e.g. liquid manure etc. - by agglomeration and sedimentation while liq. flows in thin layer over suitable surface and is then filtered using porous rubber membrane |
| 07/03/1991 | EP0435305A2 Device for the drying of sewage sludges |
| 07/02/1991 | US5028338 Adsorption on clay, mixing with binder, hardening |
| 06/26/1991 | EP0434522A1 Use of a deodorizer based on undecylenic acid ester for sludge in water waste plants. |
| 06/26/1991 | EP0338060B1 Method for stabilizing, solidifying and storing waste material |
| 06/26/1991 | CN1052440A Treatment of hazardous waste material |
| 06/25/1991 | US5026209 Containment casing for a deep well gravity pressure reactor vessel |
| 06/20/1991 | DE3941868A1 Use of sludges from waste water treatment plants - replace part of fuel in ore smelting furnaces and reduce fuel cost |
| 06/19/1991 | EP0432276A1 Method of concentrating and dehydrating slurried sludge |
| 06/19/1991 | CN2079186U Dung-cart with hydroextractor |
| 06/19/1991 | CN1052322A Method and apparatus for separating oil and soil |
| 06/12/1991 | EP0431932A1 Method for treatment of waste water |
| 06/05/1991 | EP0429750A1 Process for catalytic oxidation of organic impurities in waste waters |
| 06/05/1991 | EP0429744A2 Process for producing pasteurized substrates and apparatus therefor |
| 05/30/1991 | WO1991007209A1 Process and gas burner for cleaning, degassing, disinfecting and/or decontaminating and process for manufacturing the gas burner |
| 05/28/1991 | CA1284470C Process and apparatus for fixing, encapsulating, stabilizing and detoxifying heavy metals and the like in metal-containing sludges, soils, ashand similar materials |
| 05/23/1991 | WO1991007365A1 Process and installation for manufacturing a pasteurized substrate |
| 05/23/1991 | CA2045633A1 Process and installation for manufacturing a pasteurized substrate |
| 05/22/1991 | EP0428419A2 Method and means for treating sludge |
| 05/16/1991 | WO1991006343A1 A method of removing heavy metals form soil, sludge, compost and similar materials |
| 05/15/1991 | EP0426813A1 Process for manufacturing clinkers. |
| 05/08/1991 | EP0426115A1 Method for removing amine from solids |
| 05/08/1991 | EP0425757A1 Device for removal of water from sludge |
| 05/08/1991 | DE4000147C1 Sewage sludge vitrification - by burning waste material above bath of molten glass for ashes in upper furnace section for carbon combustion etc. |
| 05/08/1991 | DE3941951A1 Combined chemical-biological treatment of contaminated waste - has washing reaction operating intermittently |
| 05/08/1991 | DE3937039A1 Multiple treatment of liq. manure and thin sludge - by forming fine-dry material, useful as non-noxious fertilisers |
| 05/08/1991 | CN1012570B Process for treating ammonium nitrate-centg. waste water |
| 05/07/1991 | US5013458 Heating sludge by exothermic hydration of calcium oxide |
| 05/07/1991 | US5013429 Apparatus for stabilizing sludge |
| 05/07/1991 | CA1283982C Method of and apparatus for degrading organic products, by-products and scraps of human, animal and/or vegetable origin in an anaerobicmedium |
| 05/01/1991 | CN2076101U Sealed structure layer used in methane-generating pit |
| 05/01/1991 | CA2028685A1 Method for removing amine from solids |
| 04/24/1991 | EP0423400A1 Waste disposal device |
| 04/24/1991 | CN1050826A Process and device for processing materials from which methane and other chemicals, being harmful to the environment may escape |
| 04/23/1991 | US5009793 Acidification to dissolve as soluble salts, oxidation and precipitation as hydroxides; control of PH for preferential separation |
| 04/17/1991 | CN2075195U Fast stoving device for chichen stool residue |
| 04/17/1991 | CN2075194U Miniature househoid goods methane-generating device made of soft plastic |
| 04/16/1991 | US5008021 Conversion in the presence of a strong alkali; forming cementitious product with polyvalent metal ion |
| 04/16/1991 | US5007965 Material for treating heavy metals and metal ions |
| 04/11/1991 | WO1991005586A1 Treatment of hazardous waste material |
| 04/11/1991 | DE3933511A1 Waste water treatment esp. from cosmetics industry - by addn. of oxidising agent and/or catalyst and exposure to artificial UV radiation to get rid of lipophilic substances |
| 04/11/1991 | CA2042599A1 Treatment of hazardous waste material |
| 04/09/1991 | US5006639 Method of coagulating sludge |