| Patents for C02F 11 - Treatment of sludge; Devices therefor (21,423) |
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| 04/07/1991 | WO1991005213A1 High turndown rotary dryer flights |
| 04/03/1991 | EP0419590A1 An apparatus for dewatering and squeezing material |
| 04/03/1991 | CN1050368A Anaerobic digestion system |
| 03/27/1991 | EP0418847A1 Plant for processing a filtration slurry containing essentialy diatomaceous earth and process for operating the plant |
| 03/27/1991 | CN1050217A Method and equipments for extracting matter containing fat and proteins from fluid stock |
| 03/21/1991 | WO1991003309A1 Apparatus and method for removal of liquids |
| 03/21/1991 | WO1991003305A1 Process and installation for extracting fat and/or protein-containing material from fat-containing liquid material, in particular from slaughter deposits and waste |
| 03/20/1991 | EP0417714A2 Method for removal of dioxin generated in waste combustion |
| 03/20/1991 | EP0417705A1 Method and system for aqueous sewage sludge disposal |
| 03/20/1991 | EP0417343A1 Process and apparatus for the pyrolysis of sewage sludge and/or other organic wastes |
| 03/20/1991 | CN1050012A Process for treating waste water |
| 03/19/1991 | US5000860 Method for dewatering alum sludge |
| 03/19/1991 | US5000099 Combination of fuels conversion and pressurized wet combustion |
| 03/12/1991 | CA2024994A1 Method for removal of dioxin generated in waste combustion |
| 03/07/1991 | WO1991002702A1 Process for drying and/or burning sludge |
| 03/07/1991 | WO1991002700A1 Device for dewatering of forest chemistry waste |
| 03/07/1991 | DE4025740A1 Improving mechanical sepn. of solids in communal waste water treatment - by treating water with flocculating agent in an agitated pressure vessel and conveying by pressurised gas supply to filter press separator |
| 03/07/1991 | DE4021309A1 Process thermally breaking down chemical and treating toxic residues - has number of indirectly heated fluidised bed incinerators used in series to provide efficient disposal of harmful chemicals |
| 03/07/1991 | DE3928427A1 Removing heavy metals, esp. mercury from contaminated earth - by repeated washing and fractionation forming conc, fraction for furnace |
| 03/06/1991 | EP0326561B1 Process for immobilizing harmful substances in the ground or in ground-like materials |
| 03/06/1991 | CN1049629A Dehydration press |
| 03/05/1991 | US4997572 High rate method for alkaline stabilization, beneficiating and pelletizing of wastewater treatment plant sludges |
| 03/05/1991 | CA1280901C Pretreatment of solid wastes, and wastes to be compacted, for introduction into underground salt cavities or salt caverns via a downpipeunder the force of gravity |
| 02/28/1991 | DE4011400A1 Treating liquids, slurries and pastes - by contact with comminuted organic fibres of high absorption capacity, to produce flowable or plastic material |
| 02/28/1991 | DE3933576C1 Extruding industrial sludge into pellets - increasing dry material content to over 70 per-cent, expelling water |
| 02/28/1991 | DE3928325A1 Verfahren zum trocknen und/oder verbrennen von klaerschlamm A method of drying and / or burning of sludge |
| 02/27/1991 | EP0414653A1 Method of disposing of wastes containing heavy metal compounds |
| 02/27/1991 | EP0414621A1 Dehydrating press |
| 02/27/1991 | EP0414539A1 Method for treating organic waste water by methane fermentation. |
| 02/27/1991 | EP0413940A2 Device for continuous and automatic draining sludge, especially sewage sludge |
| 02/26/1991 | US4995981 Process for anaerobically degrading highly loaded process waste waters |
| 02/26/1991 | CA2023048A1 Dehydration press |
| 02/26/1991 | CA1280558C Composition to encapsulate toxic metal and/or organic pollutants from wastes |
| 02/22/1991 | CA2023597A1 Method of disposing of wastes containing heavy metal compounds |
| 02/21/1991 | WO1991002139A1 Casing for gravity pressure reactor vessels |
| 02/21/1991 | DE3926996A1 Disposal of domestic refuse - by mixing it with slurry, then drying and subsequently burning mixture |
| 02/20/1991 | EP0413356A1 Process for treating waste water |
| 02/19/1991 | US4994169 Delayed coking of dewatered waste mixture yields heavy and light hydrocarbon oils and coke |
| 02/19/1991 | US4993331 Mixing with binder, pyrolysis, oxidation, vitrification |
| 02/17/1991 | WO1991002550A1 Process and plant for producing heat treated growth substrate and manure |
| 02/17/1991 | CA2064700A1 Process and plant for producing heat treated growth substrate and manure |
| 02/16/1991 | WO1991002582A1 Process and device for processing materials from which methane and other chemicals, being harmful to the environment, may escape |
| 02/16/1991 | CA2064698A1 Process and device for processing materials from which methane and other chemicals, being harmful to the environment, may escape |
| 02/14/1991 | DE3926269A1 Treatment of organic sludges from municipal and farm sources - by placing sludges in gas tight heat insulated room with solar heating for reduced environment pollution and energy |
| 02/13/1991 | EP0412388A2 Process of preparation of fine particles of polymers in powder form |
| 02/13/1991 | CN1011585B Method and equipment for treating low concentration fecal sewage from city |
| 02/09/1991 | WO1991001823A1 Method for treating residual lime sludge |
| 02/09/1991 | CA2060187A1 Method for treating residual lime sludge |
| 02/09/1991 | CA2021759A1 Preparation of finely divided polymer powders |
| 02/06/1991 | EP0411881A1 Partial oxidation of sewage sludge |
| 02/06/1991 | EP0411880A1 Partial oxication of sewage sludge |
| 02/06/1991 | EP0411052A1 Process for the chemical bonding of heavy metals from sludge in the silicate structure of clays and shales and the manufacture of building and construction materials therewith |
| 02/06/1991 | EP0410961A1 A method and an apparatus for separating solid particles from a liquid. |
| 02/05/1991 | US4989522 Separation, combustion using plasma arc |
| 02/05/1991 | US4989344 Particulate removal for a sludge treatment process |
| 02/03/1991 | CA2007615A1 Method of improving the quality of large amount of water and the quantity of dissolved oxygen therein, and apparatus for said improvement |
| 01/30/1991 | CN1048839A Mixed preparation of slurry from oil shale by dry distillation of oil mud and dry distillation of waste water, and burning technology |
| 01/29/1991 | US4988442 Heat treatment, centrifuging, conditioning, drying |
| 01/23/1991 | EP0409367A1 Process and plant for purification of waste water |
| 01/23/1991 | EP0323482B1 Process for purifying polluted materials and use of the product thus obtained |
| 01/17/1991 | DE3922929A1 Adding wood powder to dewatered sewage sludge - produces more effective ground conditioner |
| 01/17/1991 | DE3922298A1 Dewatering municipal or industrial sewage sludge - with addn. of sludge from cellulose or paper mfr. and synthetic organic flocculant |
| 01/16/1991 | EP0408545A1 Process for immobilizing harmful substances and/or for making them inert |
| 01/16/1991 | EP0407404A1 A method for the break-down and recycling of solid urban waste by anaerobic fermentation. |
| 01/16/1991 | CN2069413U Trough type methane-generating device |
| 01/15/1991 | WO1991001280A1 Process for rendering inert and/or immobilizing environmentally harmful substances |
| 01/15/1991 | CA2063395A1 Process for rendering inert and/or immobilizing enviromentally harmful substances |
| 01/15/1991 | CA1279131C Oxidation process for substances dissolved or suspended in an aqueous medium |
| 01/15/1991 | CA1278919C Reduction burning and compositions therefore |
| 01/15/1991 | CA1278916C Sludge processing |
| 01/09/1991 | EP0406733A2 Method for removing halogenated organic compounds from waste water |
| 01/09/1991 | CN2068966U Cover-breaking devices for methane-generating pits with meander charge |
| 01/08/1991 | US4983698 Flocculants; produced from acrylamide, quaternary dialkylaminoalkyl acrylate monomers, and a waste stream which is the result of the transesterification reaction used to produce the cationic monomer |
| 01/08/1991 | US4983298 Process for the disinfection and aerobic stabilization of sewage sludge |
| 01/08/1991 | US4983296 Shearing, concentration, mixing with coal supplemental fuel; hydrothermal; pollution control |
| 01/04/1991 | WO1991000249A1 Method of concentrating and dehydrating slurried sludge |
| 01/02/1991 | EP0405478A1 Melting disposal method of sludge |
| 01/02/1991 | CN1048207A Method for processing organic waste and apparatus therefor |
| 01/01/1991 | US4981600 Method and means for treating sludge |
| 01/01/1991 | US4981593 Sewage treatment |
| 12/27/1990 | EP0403509A1 Advertising device |
| 12/25/1990 | US4980030 Heating to volatilize solvent and cure paint resin; collecting solids; removal |
| 12/20/1990 | DE3918717A1 Active charcoal like material prodn. from activated sludge - by pyrolysis in absence of air, used to improve performance of waste water purifiers |
| 12/19/1990 | EP0402737A2 Process and apparatus for the treatment of sludges containing heavy metals |
| 12/19/1990 | EP0344152B1 Process and installation for dewatering waste water sludge |
| 12/19/1990 | CN1047844A Closed container and technique for daily garbage disposal |
| 12/18/1990 | US4977839 Process and apparatus for separating organic contaminants from contaminated inert materials |
| 12/13/1990 | DE3919001A1 Solidifying and utilising sewage sludge as soil improver - by mixing with absorbent fibrous waste material, pressing into blocks and drying |
| 12/13/1990 | DE3918527A1 Device for disposal of sewage sludge - comprises rotating drum dryer and filter band press used instead of centrifuge to improve throughput of sludge drying system |
| 12/12/1990 | EP0401811A1 Apparatus for the thermal treatment of organic and inorganic materials |
| 12/12/1990 | EP0290488A4 Treatment of waste and a rotary kiln therefor |
| 12/12/1990 | CN2067277U Sanitary excremental treating device for rural domestic toilet |
| 12/11/1990 | US4976863 Wastewater treatment process |
| 12/06/1990 | DE3943476C1 Appts. for drying clarified sewage sludge - comprises turning over sludge contg. specific amt. solids in contact with hot surfaces, agglomerating to particles etc. |
| 12/04/1990 | US4975195 Heating and separating the solid and liquid portion, condensing the gases; sewage treatment; pollution control |
| 12/04/1990 | US4975194 Heating and mixing with a mixture containing oxygen gas and circulated vent gas |
| 12/04/1990 | US4975193 Method for removing cyanide from a fluid |
| 12/04/1990 | US4974335 Method and apparatus for drying sewage sludge |
| 12/01/1990 | WO1990014899A1 Process for manufacturing clinkers |
| 12/01/1990 | CA2033342A1 Process for manufacturing clinkers |