| Patents for C05F 7 - Fertilisers from waste water, sewage sludge, sea slime, ooze or similar masses (2,138) |
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| 12/01/1988 | WO1988009316A1 Preparation of free-flowing solids from aqueous waste |
| 11/01/1988 | US4781842 With lime |
| 09/21/1988 | EP0283153A1 Method of treating wastewater sludge |
| 03/10/1988 | WO1988001607A1 Process for decomposing mineral oil derivatives contained in washings and sludges |
| 01/21/1988 | DE3622881A1 Soil conditioner for woodland soils |
| 01/14/1988 | DE3622929A1 Method for controlling undue acidification of woodland soils |
| 09/09/1987 | EP0235637A2 Process and apparatus for purifying waste water sludge of organic origin |
| 05/26/1987 | US4668388 Dewatering, aerobic degradation of biosludge, closed system |
| 05/13/1987 | EP0221219A1 Biological agricultural soil additive obtained from sewage sludge, and method for its preparation |
| 04/21/1987 | US4659472 Mixed with carbon carrier and dewatered |
| 04/16/1987 | DE3631010A1 Moulded brick arrangement for a floor covering for composting and for purification of waste water or exhaust gas |
| 03/05/1987 | DE3531748A1 Sewage sludge utilisation plant |
| 12/30/1986 | US4632692 Process and installation for simultaneously producing compost and biogas from organic waste |
| 11/26/1986 | CN86102346A Process for operating a fermenter and apparatus for stirring the fermenter |
| 07/29/1986 | CA1208450A1 Process for enhancing or fertilizing the soil using organic waste derived granulate |
| 06/04/1986 | EP0183005A2 Process for winning and working up homogenized humus |
| 05/21/1986 | EP0181615A2 Method and plant for the treatment and the recycling of sewage sludge and biowaste |
| 05/14/1986 | EP0181153A2 Process for the utilisation of solid paper mill waste |
| 05/06/1986 | US4587019 Aerobic digestion of sludge |
| 04/08/1986 | CA1203028A1 Process for the treatment of organic fall-out products |
| 03/26/1986 | EP0174938A1 Fertilizer process. |
| 03/18/1986 | US4576627 Method of providing fertilizer from brines |
| 02/26/1986 | EP0172292A1 Process and apparatus for the simultaneous production of compost and biogas from organic wastes |
| 12/31/1985 | CA1198605A1 Anaerobic digestion of organic waste for biogas production |
| 11/19/1985 | US4554002 Beneficiating waste sludges for agricultural use and product made thereby |
| 10/02/1985 | EP0156244A1 Process for making a soil-improving agent |
| 10/01/1985 | CA1194333A1 Composting compositions |
| 09/26/1985 | WO1985004166A1 Process for producing a soil improving agent |
| 08/28/1985 | EP0153282A2 A method for producing a compostable mixture of sludge from sewage purification plants, and apparatus for using the mixture |
| 08/07/1985 | EP0150951A1 Aerobic digestion of sludge |
| 08/01/1985 | WO1985003285A1 Fertilizer process |
| 06/26/1985 | EP0145792A1 Anaerobic digestion of organic waste for biogas production |
| 05/28/1985 | US4519831 Premixing with liquid ureaform |
| 03/12/1985 | US4504394 Process for the treatment of organic fall-out products |
| 03/05/1985 | US4503154 Methane and fertilizer |
| 02/12/1985 | US4498855 Apparatus for the treatment of animal excrements and sewage sludges |
| 01/22/1985 | US4494975 Composing compositions |
| 12/18/1984 | US4488971 Process for even division of substances and mixtures of substances in the course of manufacture of pulverulent preparations by chemical reaction |
| 11/20/1984 | US4483704 Method for composting sludge |
| 11/07/1984 | EP0123985A2 Process for the detoxication of waste water sludge |
| 08/01/1984 | EP0048723B1 Treatment of activated or humus sludge |
| 07/10/1984 | CA1170790A1 Method and installation for purifying contaminating water |
| 07/03/1984 | US4457945 Aerobic fermentation |
| 05/29/1984 | US4451372 Method and installation for purifying contaminating water |
| 03/14/1984 | EP0102436A1 Method for the treatment of organic wastes comprising the separation of toxic materials |
| 03/07/1984 | EP0102243A2 Process for enhancing or fertilizing the soil using organic waste derived granulate |
| 12/13/1983 | US4420320 Method of biologically drying waste material |
| 10/18/1983 | CA1155313A1 Controlled sludge composting system |
| 07/12/1983 | US4392881 Continuous, efficient |
| 07/05/1983 | CA1149188A1 Microbiological process for recultivation of industrial refuse heaps |
| 05/03/1983 | CA1145866A1 Sewage and waste water treatment |
| 04/05/1983 | US4378886 Decomposition apparatus with reversible removal conveyor |
| 02/22/1983 | US4374804 Mixing sludge with compositing agent, layering in and conveying through silos while aerating mixture |
| 09/21/1982 | US4350598 Oil in calcium hydroxide |
| 08/03/1982 | US4342650 Organic sludge-energy recycling method |
| 07/14/1982 | EP0055967A1 Process and apparatus for the treatment of nitrogen compounds containing waste water |
| 07/13/1982 | US4339265 Sewage treatment method and apparatus |
| 06/29/1982 | CA1126504A1 Process for thermal treatment, especially drying |
| 06/01/1982 | CA1124540A1 Method and apparatus for composting sludge |
| 04/07/1982 | EP0048723A1 Treatment of activated or humus sludge. |
| 03/31/1982 | EP0048683A1 Method and apparatus for the purification of pollutant residues |
| 03/02/1982 | US4317671 Process of composting refuse or refuse/sewage sludge mixtures by thermal retting |
| 01/26/1982 | CA1117042A1 High nitrogen and phosphorous content biomass produced by treatment of a bod containing material |
| 12/08/1981 | US4304049 Process for thermal treatment, especially drying |
| 10/27/1981 | US4297216 By adding an acid, heating, neutralizing and anaerobically digesting |
| 10/20/1981 | US4295972 Exothermic reaction with calcium oxide |
| 10/15/1981 | WO1981002888A1 Treatment of activated or humus sludge |
| 09/09/1981 | EP0035112A1 Method and apparatus for processing preferably rottable, solid and liquid waste material |
| 09/08/1981 | US4288241 Method and apparatus for composting sludge |
| 09/08/1981 | CA1108403A1 Fuel from composting solid organic wastes |
| 07/07/1981 | US4276915 Sludge separation plant |
| 06/02/1981 | CA1102455A1 Device for preparation and hygienisation of refuse or refuse-clarified sludge mixtures by means of composting |
| 05/12/1981 | US4267049 Comprising hydrolysis by enzymes and enzyme-producing microorganisms |
| 04/08/1981 | EP0026440A1 Method of drying solid refuse biologically |
| 03/10/1981 | US4255389 Apparatus for rapid machine composting of sewage sludge |
| 02/17/1981 | CA1096062A1 Waste material digesters |
| 02/17/1981 | CA1096061A1 Methods of and apparatus for aerobic decomposition of organic solids |
| 02/10/1981 | US4249929 Method of digesting organic wastes |
| 01/13/1981 | US4244804 Slime and sludge dewatering |
| 12/30/1980 | CA1092730A1 Process for the continuous treatment of wet sludge from a sewage treatment plant |
| 12/23/1980 | US4240210 Method and apparatus for utilizing solar energy in a water and waste management system |
| 12/10/1980 | EP0019898A1 Process for preparing a storage-stable and biologically active soil improving agent |
| 11/25/1980 | CA1090259A1 Amyl alcohol and acetic acid to reduce odor of sewage sludge |
| 10/21/1980 | US4229202 Wastewater treatment with ultraviolet disinfection and increased capacity |
| 10/07/1980 | US4226712 Method and apparatus for treating water containing wastes |
| 09/16/1980 | CA1085976A1 Treatment of aqueous sludges |
| 09/09/1980 | CA1085520A1 Handling of waste material |
| 08/12/1980 | US4217219 Sewage delivery and filtration system |
| 07/29/1980 | US4214887 Sewage and waste water treatment |
| 07/09/1980 | EP0012775A1 Process for pulping ligno-cellulosic material |
| 05/27/1980 | US4204958 Method and apparatus for treatment of sludge |
| 05/20/1980 | US4203376 Treatment of waste |
| 04/29/1980 | CA1076720A1 Method and apparatus for composting refuse/sewage sludge mixtures |
| 03/18/1980 | US4193206 Processes for drying sewage sludge and filtering water |
| 03/11/1980 | US4192848 Pollution control |
| 03/04/1980 | US4191647 Filtration system for household sewage |
| 03/04/1980 | US4191549 Solar chemical process for sludge treatment |
| 02/26/1980 | CA1072287A1 Apparatus for irradiating flowable material |
| 01/29/1980 | US4185680 Process for producing useful concentrated slurries from waste material |
| 01/23/1980 | EP0007011A1 Apparatus for continuously mixing and granulating slime with a solid material |