| Patents for C05F 7 - Fertilisers from waste water, sewage sludge, sea slime, ooze or similar masses (2,138) |
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| 06/22/1993 | US5221312 Water and soil treatment method |
| 06/17/1993 | DE4141345A1 Sewage sludge decontamination - forces sludge by centrifugal force against cathode wall, ionises heavy metals for deposition on anode |
| 06/02/1993 | EP0544228A1 Process for recovery of agriculture valuable sewage sludge |
| 05/19/1993 | EP0542162A1 Process for waste water disposal |
| 04/14/1993 | EP0536716A1 Process for recultivation of fallow and/or industrially used lands by employing sewage sludge |
| 03/31/1993 | EP0534865A1 Process for separating lysine in the form of an aqueous solution and use of said solution in animal food |
| 03/24/1993 | EP0532797A1 A method of converting biological masses for agricultural use |
| 03/18/1993 | CA2058568A1 Method of converting biological masses for agricultural use |
| 03/10/1993 | EP0530826A1 Process for dewatering of sludge and use of the dewatered concentrated product as soil improver and fertiliser |
| 03/04/1993 | CA2077508A1 Organic base fertilizer from municipal sewage sludge |
| 03/02/1993 | US5190649 Apparatus for mixing aqueous ammonium chloride and sodium sulfate with sludges, rotating container having drum with lifter blades and residence zone, inlet, discharge, separating apparatus with filter tray, drying apparatus |
| 01/12/1993 | US5178776 Heating, acidification and chlorinating oxidation under acid conditions, separation and recovering soild phase |
| 10/28/1992 | CN1065644A Apparatus for purifying sewage |
| 10/28/1992 | CN1065643A Method for purifying sewage |
| 10/14/1992 | EP0508383A1 Control and measurement method for the biological drying of sewape sludge |
| 10/14/1992 | EP0508382A1 Process for the biological drying of sewage sludge |
| 10/08/1992 | DE4110950A1 Processing dredger sludge etc. into granular soil improvement agent - by mixing sediment with organic structuring agent with high surface area and opt. inorganic fertilisers, compounding and granulating mixt. and partially drying, to prevent clumping |
| 09/30/1992 | EP0506139A1 Method for manufacturing of organic fertilizers |
| 09/01/1992 | US5143481 Method of treating municipal sewage sludge and product produced thereby |
| 07/21/1992 | USRE33998 Apparatus and process for producing an organic product from sewage sludge |
| 06/30/1992 | US5125951 Process for producing a dried fertilizer from sewage sludge |
| 06/03/1992 | EP0487600A1 Process and plant for producing heat treated growth substrate and manure. |
| 05/27/1992 | EP0486932A1 Biological soil improvement material for agricultural purposes and method of producing same |
| 04/29/1992 | EP0482407A2 Process for the production of an animal and/or vegetable nutritive substance from organic waste |
| 03/11/1992 | CN1059322A Alkaliferous industrial waste water and waste slag treatment method |
| 03/03/1992 | US5093262 Method and apparatus for producing organic fertilizer with the use of nitrogen fixing bacillus |
| 02/05/1992 | CN1058387A Utilization of waste industrial liquid in production of systine |
| 01/08/1992 | EP0328574B1 Process for the conversion and working up of a mixture of organic matter, anorganic matter and water to a nearly dry product, as well as an installation for the execution of the process and application thereof by the conversion of manure slurry |
| 01/02/1992 | EP0463546A1 Process and apparatus for drying of sewage sludge by a biological process |
| 12/24/1991 | US5075008 Process for high-load treatment of carbohydrate containing waste water |
| 12/10/1991 | US5071462 Method and apparatus for producing organic fertilizer with the use of nitrogen fixing bacillus |
| 09/25/1991 | CN1054760A Rare-earth composite fertilizer for forest |
| 09/24/1991 | US5051031 Fly ash or fluidized bed combustion residue mixed with sludge, storage to remove pathogens |
| 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 | CN1054580A Method for promoting plant growth |
| 07/23/1991 | CA2008340A1 Process for aerobic enzymatic treatment of organic matter |
| 07/16/1991 | US5032289 In situ off-shore processing of urban sewage without using or contaminating urban land |
| 07/11/1991 | DE4000329A1 Solidification of farmyard slurry - with addn. of acids produced from sewage sludge to react with nitrogen cpds. |
| 06/19/1991 | EP0321456B1 Process for decomposing mineral oil derivatives contained in washings and sludges |
| 06/12/1991 | CN1052106A Technology for reusing waste ammoniated mother sludge generated in combined alkali-making process |
| 06/05/1991 | EP0429744A2 Process for producing pasteurized substrates and apparatus therefor |
| 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 |
| 04/25/1991 | DE3935089A1 Particles of foamed starch to aid composting or improve soil - used to loosen structure of soil or compost to promote microbial growth and biodegradation of organic components |
| 04/24/1991 | EP0423506A2 Laying-out soil |
| 04/17/1991 | EP0422089A1 Composting apparatus for organic waste |
| 03/06/1991 | CN1049648A Nutrient for plant and its prepn. method |
| 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 |
| 02/09/1991 | WO1991001823A1 Method for treating residual lime sludge |
| 02/09/1991 | CA2060187A1 Method for treating residual lime sludge |
| 01/29/1991 | US4988442 Heat treatment, centrifuging, conditioning, drying |
| 01/23/1991 | EP0409367A1 Process and plant for purification of waste water |
| 01/02/1991 | CN1048207A Method for processing organic waste and apparatus therefor |
| 01/01/1991 | US4981600 Method and means for treating sludge |
| 12/13/1990 | DE3919001A1 Solidifying and utilising sewage sludge as soil improver - by mixing with absorbent fibrous waste material, pressing into blocks and drying |
| 11/28/1990 | EP0174938B1 Fertilizer process |
| 11/28/1990 | CN1047339A Apparatus for stirring fermenter |
| 11/14/1990 | CN1010407B Process for operating a fermenter and apparatus for stirring the fermenter |
| 11/07/1990 | EP0396390A1 Method for processing organic waste and apparatus therefor |
| 11/07/1990 | EP0395724A1 Process for utilizing sewage sludge. |
| 11/03/1990 | CA2015962A1 Method for processing organic waste and apparatus therefor |
| 10/30/1990 | US4966706 Peracid treatment; free of pathogenic microorganisms |
| 10/10/1990 | EP0391753A1 Process and apparatus for aerating a moist, fermentable, organic product with treatment process control |
| 09/07/1990 | WO1990009964A1 Biological treatment of sewage sludge or similar waste matter |
| 08/09/1990 | WO1990008746A1 Mechanical system for a waste-to-fertilizer conversion process |
| 08/08/1990 | EP0380888A1 Mechanization of a process for converting waste into fertilizer |
| 08/01/1990 | CN1044274A Method for processing of liquid manure and similar slurry materials, and apparatus for execution of method |
| 05/31/1990 | DE3839830A1 Process for disposing of or treating sewage sludge |
| 05/30/1990 | EP0370019A1 Preparation of free-flowing solids from aqueous waste |
| 03/07/1990 | EP0356781A1 Process for treating organic material |
| 02/20/1990 | US4902431 Method for treating wastewater sludge |
| 02/01/1990 | DE3825229A1 Process and apparatus for the biological processing of organically polluted liquids |
| 01/11/1990 | WO1990000162A1 Composting apparatus for organic waste |
| 01/09/1990 | CA1264233A1 Method of treating wastewater sludge |
| 01/09/1990 | CA1264232A1 Method of treating wastewater sludge |
| 11/21/1989 | US4882058 Organic waste recycling system and method |
| 11/14/1989 | US4880586 Method for the treatment of animal excrements and sewage sludges |
| 11/02/1989 | EP0339354A1 Method of and apparatus for treatment of sewage screenings |
| 11/02/1989 | EP0339025A1 Improved process and equipment for purifying treatment and utilization of waste-waters from the dairy industry |
| 10/31/1989 | US4877531 Process for treating various refuse materials, particularly smoke, garbage and sewage |
| 10/26/1989 | DE3812499A1 Process and plant for the utilisation of organically polluted waste waters from low-temperature carbonisation plants for organic wastes |
| 08/23/1989 | EP0328574A1 Process for the conversion and working up of a mixture of organic matter, anorganic matter and water to a nearly dry product, as well as an installation for the execution of the process and application thereof by the conversion of manure slurry |
| 08/17/1989 | DE3803282A1 Process for preparing a soil substitute capable of being cultivated |
| 08/02/1989 | CN1034357A Method for utilizing sludge |
| 07/27/1989 | WO1989006486A1 Process for utilizing sewage sludge |
| 06/28/1989 | EP0321456A1 Process for decomposing mineral oil derivatives contained in washings and sludges. |
| 06/27/1989 | CA1256602A1 Method for producing a compostable mixture of sludge from sewage purification plants, and apparatus for using the mixture |
| 06/27/1989 | CA1256449A1 Fertilizer process |
| 06/14/1989 | EP0319789A1 Process for producing a dried, granulated waste water sludge. |
| 06/06/1989 | US4836843 Fertilizer process |
| 04/20/1989 | WO1989003369A1 Improved process and equipment for purifying treatment and utilization of waste-waters from the dairy industry |
| 04/20/1989 | DE3727408A1 Plant for sludge utilization |
| 04/05/1989 | EP0309872A2 Process for composting urban waste |
| 02/14/1989 | US4804402 Preparation of natural fertilizing material |
| 02/08/1989 | EP0302298A2 Disinfection of sewage sludge |
| 02/08/1989 | EP0302179A1 Process for transforming activated sludge into humus |
| 01/26/1989 | WO1989000550A1 Process for the conversion and working up of a mixture of organic matter, anorganic matter and water to a nearly dry product, as well as an installation for the execution of the process and application thereof by the conversion of manure slurry |
| 12/07/1988 | CN88101683A Method of treating wastewater sludge |