| Patents for C05F 7 - Fertilisers from waste water, sewage sludge, sea slime, ooze or similar masses (2,138) |
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| 01/22/1980 | US4184269 Apparatus for aerating organic waste material |
| 12/25/1979 | US4180459 Fertilizers, mulch/; |
| 12/25/1979 | US4180392 Method for producing organic fertilizers |
| 12/12/1979 | EP0005703A1 Process for the preparation of fuel and nutritive substances from wastes |
| 08/28/1979 | CA1061129A1 Product for producing the physical media for plant growth |
| 08/21/1979 | US4165289 Self-sufficient heat treatment |
| 08/14/1979 | US4164413 Method for promoting growth of plants with cationic polymers |
| 07/24/1979 | US4162153 High nitrogen and phosphorous content biomass produced by treatment of a BOD-containing material |
| 07/03/1979 | US4159944 Chelation of heavy metals from fertilizers |
| 06/12/1979 | US4157961 Combined waste water clarification and trash disposal system |
| 04/17/1979 | CA1052591A1 Landfill and soil conditioner |
| 03/27/1979 | US4146382 Aeration by forming tunnels |
| 03/27/1979 | US4146381 Crushing, stacking, tunneling |
| 02/13/1979 | CA1048291A1 Process for treating sewage sludge and fertilizer products thereof |
| 02/06/1979 | US4138333 Waste material digesters |
| 01/30/1979 | US4137062 Sewage treatment |
| 01/23/1979 | US4135908 Method of and apparatus for aerobic decomposition of organic solids |
| 01/10/1979 | EP0000195A1 Process for treating sludge or ashes, especially clarified sludge sewage or clarified sewage ashes |
| 01/02/1979 | US4132638 Aerobic, thermophilic degradation with enzyme addition |
| 12/12/1978 | US4128946 Organic waste drying process |
| 11/28/1978 | US4127383 Lignosulfonate |
| 11/14/1978 | CA1042225A1 Process for conditioning sewage sludge |
| 11/07/1978 | US4124502 Process for the purification of greasy and soiled water using a heavy solvent, and apparatus for its implementation |
| 11/07/1978 | US4124501 Purifying oil shale retort water |
| 08/29/1978 | CA1037468A1 Soil conditioners and fertilizers from spent sulfite liquor |
| 07/11/1978 | US4099336 Organic waste drying process |
| 07/04/1978 | US4098006 Organic waste dewatering and drying process |
| 02/28/1978 | US4076515 Removal of ammonia |
| 01/17/1978 | US4069033 Extraction of fertilizer salts and organic substances of high nutritive value from industrial waste waters |
| 12/13/1977 | US4062770 Or sewage sludge |
| 11/08/1977 | US4057392 Apparatus for treating sewage sludge |
| 10/11/1977 | US4053394 Process for separating and converting waste into useable products |
| 09/06/1977 | US4046689 Method and apparatus for transporting sludge while rendering it for conversion into fertilizer |
| 03/15/1977 | US4012219 Method for reclaiming variegated wastes |
| 11/02/1976 | US3989498 Amyl alcohol and glacial acetic acid |
| 06/15/1976 | US3963471 Apparatus and process for producing an organic product from sewage sludge |
| 05/25/1976 | US3959125 Treatment and disposal of sewage sludge |
| 03/16/1976 | US3944408 Method for producing biological fertilizers from sewage |