| Patents for C05F 17 - Preparation of fertilisers characterised by the composting step (8,976) |
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| 09/07/1990 | WO1990009964A1 Biological treatment of sewage sludge or similar waste matter |
| 09/04/1990 | US4953457 Method and a continuous cycle compactor-apparatus, including a circulating forced air pre-chamber for treating biodegradable solid urban waste materials and for separating and recycling the non-biodegradable components thereof |
| 08/28/1990 | US4952230 Method of bringing gases into contact with compostible material or partially composted material, and an arrangement for carrying out the method |
| 08/16/1990 | DE3903947A1 Installation for rotting organic material |
| 08/15/1990 | CN1044579A Method for manufacture of fodder and/or soil improving agents from maste material |
| 08/09/1990 | WO1990008747A1 Device for repiling bulk materials |
| 08/07/1990 | US4946108 Apparatus for producing compost |
| 07/19/1990 | DE4000510A1 Greenery rubbish and bio:waste treatment - by composting in separate stockpiles in two walls |
| 07/12/1990 | WO1990007282A1 Process for producing silage and/or soil conditioners from waste materials |
| 07/10/1990 | US4940338 Device for the mixing of compost |
| 06/28/1990 | WO1990006988A1 Composting method and apparatus utilizing air assist to aid in movement of organic matter |
| 06/28/1990 | WO1990006890A1 Container for disposing waste |
| 06/13/1990 | DE3841804A1 Process and arrangement for carrying out the process for operating an arrangement for separating off organic impurities from exhaust gases which are forced through a vessel-enclosed biomass as absorbent |
| 06/13/1990 | DE3841168A1 Method and arrangement for composting organic waste, such as domestic rubbish, sewage sludge or the like |
| 06/12/1990 | US4932196 Compost windrow turner |
| 05/23/1990 | DE3835982A1 Method of composting kitchen and garden waste and device for implementing this method |
| 04/04/1990 | EP0361002A2 Container, especially a compost container |
| 03/22/1990 | WO1990002720A1 A composting device for toilet and kitchen waste |
| 03/21/1990 | EP0358986A1 Machine for shifting and turning compost |
| 03/15/1990 | DE3830289A1 Method and device for composting organic substances |
| 03/13/1990 | CA1266726A1 Plant for the aerobic biologic conversion of waste organic materials |
| 03/08/1990 | WO1990002108A1 Process for conversion of biomass |
| 03/07/1990 | EP0356816A2 Process for the conversion of biomasses |
| 03/01/1990 | DE3927864A1 Compost cut from pile by belt-mounted scrapers - transferred by inclined conveyor belt to new location |
| 03/01/1990 | DE3829018A1 Method and device for composting waste |
| 02/28/1990 | EP0355445A2 Packaging element |
| 02/22/1990 | WO1990001473A1 Composting method and apparatus utilizing inclined vessel |
| 02/15/1990 | DE3827288A1 Process and arrangement for carrying out the process for the microbiological degradation of organic wastes |
| 02/14/1990 | EP0354606A1 Process and apparatus for preparing compost |
| 02/14/1990 | EP0354443A2 Apparatus for the manufacture of compost |
| 02/13/1990 | US4900348 Production of disease suppresive compost and container media, and microorganism culture for use therein |
| 02/01/1990 | DE3825229A1 Process and apparatus for the biological processing of organically polluted liquids |
| 01/30/1990 | US4897195 System and process for anaerobic digestion of waste materials |
| 01/11/1990 | WO1990000162A1 Composting apparatus for organic waste |
| 12/28/1989 | WO1989012611A1 Process for disposing of organic refuse, in particular organic refuse in the packing and foodstuffs industries, and oil-containing organic refuse |
| 12/20/1989 | EP0346642A1 Machine for shifting and overturning compost |
| 11/08/1989 | EP0341196A2 Moving bed reactor having a large surface crossflow |
| 11/08/1989 | EP0218596B1 Process for aerobic biological transformation of organic waste |
| 11/02/1989 | EP0340177A2 Continous cycle compactor tunnel with a circulating forced air forechambre for getting off solid urban waste materials biodegradable and for selecting those no biodegradable but recycling |
| 11/02/1989 | DE3912474A1 Process for the preparation of compost |
| 10/31/1989 | US4877531 Process for treating various refuse materials, particularly smoke, garbage and sewage |
| 10/26/1989 | DE3812766A1 Method of making compost |
| 10/26/1989 | DE3812518A1 Composting installation as well as composting method which can be carried out with this composting installation |
| 10/26/1989 | DE3812499A1 Process and plant for the utilisation of organically polluted waste waters from low-temperature carbonisation plants for organic wastes |
| 10/17/1989 | US4874419 Aerobically digestion mixture of vegetable wastes, mineral fertilizers and water |
| 10/10/1989 | US4873619 Method and apparatus for controlling a static converter at an asymetrical network |
| 10/05/1989 | DE3907751C1 Method and device for liquid manure composting |
| 09/26/1989 | US4869877 Automatic apparatus for sewage treatment |
| 09/14/1989 | DE3806820A1 Process for utilising immature compost |
| 09/07/1989 | DE3805864A1 Method for environment-friendly removal of cattle and/or pig liquid manure |
| 08/31/1989 | DE3805040A1 Dismantleable composter |
| 08/24/1989 | WO1989007585A1 A method for feeding a substance to a composter and a composter |
| 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 | DE3803371A1 Comminuting compost shifter |
| 08/10/1989 | DE3819979A1 Device for rotting vegetable and animal waste as well as use of this device |
| 08/10/1989 | DE3800201C1 Method of composting organic waste and/or sewage sludge in closed containers |
| 08/03/1989 | DE3801319A1 Device for transferring compost stacks |
| 08/02/1989 | EP0326069A1 Process and apparatus for the treatment of organic wastes |
| 07/26/1989 | EP0324813A1 Putrefaction plant |
| 07/13/1989 | WO1989006223A1 Use of calcium sulphate to improve the fermentation of organic fertilizers |
| 07/06/1989 | DE3743904A1 Verfahren zur verwertung von haushaltsabfaellen und anlage fuer die durchfuehrung des verfahrens Process for the recovery of haushaltsabfaellen and system for implementing the method |
| 07/06/1989 | DE3743651A1 Method and apparatus for composting |
| 07/05/1989 | EP0322831A1 Use of calcium sulphate to improve the fermentation of organic wastes |
| 07/04/1989 | CA1256711A1 Compost air injection and evacuation system with improved air control |
| 06/28/1989 | EP0321596A1 Apparatus for producing humus |
| 06/28/1989 | EP0321456A1 Process for decomposing mineral oil derivatives contained in washings and sludges. |
| 06/22/1989 | DE3741892A1 Method for producing compost earth from mainly vegetable waste materials |
| 06/06/1989 | US4837153 Using lance with two separate fluid flow zones |
| 05/17/1989 | EP0315871A1 Process and device for the control of a current rectifier in an asymmetric network |
| 05/11/1989 | DE3819700C1 Method for disposing of household refuse and the like by classification and composting |
| 05/09/1989 | CA1253978A1 Anaerobic digestion apparatus and process |
| 04/26/1989 | EP0313034A2 Vehicle for composting waste or dust |
| 04/20/1989 | DE3727408A1 Plant for sludge utilization |
| 04/19/1989 | EP0164384B1 Method and apparatus for treating biological waste by means of composting |
| 04/05/1989 | EP0309872A2 Process for composting urban waste |
| 03/16/1989 | DE3830177A1 Method and device for composting organic waste substances |
| 03/08/1989 | EP0305520A1 Compost-making combine |
| 02/22/1989 | EP0303652A1 Method and plant for composting. |
| 02/02/1989 | DE3821141A1 Composter with planting boxes |
| 01/31/1989 | US4801325 Method for producing high-grade fertilizer and useful side products |
| 01/26/1989 | WO1989000551A1 Putrefaction plant |
| 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 |
| 01/19/1989 | DE3722847A1 Digestion plant |
| 01/17/1989 | US4798802 Plug-flow type |
| 01/10/1989 | US4797367 Aerobic composting apparatus |
| 01/03/1989 | US4795711 Fermentation of organic materials for producing heat and fertilizer |
| 01/03/1989 | US4795555 Molded block arrangement for a ground covering for composting waste purification |
| 12/28/1988 | EP0296645A1 Process for composting organic material and apparatus therefor |
| 12/15/1988 | DE3718030A1 Method of conditioning woodland soils |
| 12/14/1988 | EP0294796A2 Apparatus for preparing compost |
| 12/06/1988 | US4789477 Movable carriage, rotating feed screws give constant smooth level of sludge; aerobic compositing |
| 12/01/1988 | DE3802499A1 Device for composting organic waste |
| 10/27/1988 | DE3711816A1 Slab system for the rotting process |
| 10/20/1988 | WO1988007984A1 Composting plate system |
| 10/13/1988 | DE3811399A1 Process for the aerobic fermentative hydrolysis, in particular composting, of organic substances and apparatus for carrying out this process |
| 10/11/1988 | US4777138 Scoop wheel fermentation unit |
| 10/11/1988 | US4776960 Rotation of screw to simultaneous agitate and move biomass |
| 10/06/1988 | WO1988007507A1 Process for composting organic material and device for carrying out this process |
| 09/22/1988 | DE3707515A1 Method for mechanical processing of organic materials such as branch wood, bushes, shrubbery or similar materials for the purpose of composting and combination of devices for carrying out the method |
| 09/14/1988 | EP0281699A1 Turned and aerated silo composting plant |