| Patents for C02F 11 - Treatment of sludge; Devices therefor (21,423) |
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| 07/18/1990 | EP0377832A2 Process for the treatment of biomasses, e.g. sewage sludge, manure, etc. |
| 07/18/1990 | EP0377766A1 Process for avoiding special heavy metal refuse during the decontamination of natural and technical sludges, thermal residues and soils |
| 07/12/1990 | DE3919350C1 Appts. for clarifying clear slurry - comprises heating and de-watering slurry, evaporating filtrate and adding concentrate to de-watering stage |
| 07/11/1990 | CN1043688A Compound accelerator for anaerobic digestion and its productive process |
| 07/11/1990 | CA2007455A1 Water purification process 2 |
| 07/10/1990 | US4940550 Chemical flocculant |
| 07/10/1990 | US4940519 Detoxification apparatus and method for toxic waste using laser energy and electrolysis |
| 07/03/1990 | US4938877 Unique and effective separation technique for oil contaminated sludge |
| 07/03/1990 | EP0385972A4 Method for improving the utilization of polyelectrolytes in dewatering aqueous suspensions. |
| 06/28/1990 | WO1990006820A1 Method of removing arsenic and/or other amphoteric elements from sludge and solid waste materials |
| 06/28/1990 | WO1990006795A1 AN EXTRACTION PROCESS AND APPARATUS TO REMOVE PCBs FROM SOIL AND SLUDGE |
| 06/27/1990 | EP0375044A2 Neutralizing process for toxic waste material |
| 06/27/1990 | EP0374278A1 Method of recovering amine in a process for breaking emulsions and sludges |
| 06/27/1990 | CN2058676U Methane-generating device |
| 06/27/1990 | CN1043299A Process for reclaiming metals from waste catalyst and products thereof |
| 06/26/1990 | US4937052 Underground chemical reactor |
| 06/26/1990 | US4936114 To purify |
| 06/26/1990 | CA1270698A1 Method of cleaning contaminated soil |
| 06/21/1990 | DE3842445A1 Process for treating residues from, in particular, sewage sludge |
| 06/21/1990 | DE3842138A1 Process for the simultaneous treatment of mechanically predewatered sewage sludge and dry biomass wastes and plant for performing the process |
| 06/21/1990 | DE3841844A1 Verfahren und vorrichtung zum kontinuierlichen zerlegen in ihre bestandteile fliessfaehiger organischer medien, insbesondere von halogenierten kohlenwasserstoffe enthaltenden abfallprodukten und zum weiteren aufbereiten u./o. Method and apparatus for continuously decomposed into their constituents fliessfaehiger organic media, in particular of halogenated hydrocarbons containing waste products and to further prepare u. / O. entsorgen Dispose |
| 06/20/1990 | EP0373577A1 Process for the treatment of sewage sludges or industrial sludges with organic constituents by means of the conversion process |
| 06/19/1990 | US4935038 Process for recovery of usable gas from garbage |
| 06/14/1990 | WO1990003104A3 Method and plant for treating organically charged sewage |
| 06/12/1990 | US4933086 Partial oxidation of sewage sludge |
| 06/12/1990 | US4932862 Suspended gas reactor |
| 06/07/1990 | DE3840517A1 Process and apparatus for the production of energy from biomass |
| 06/06/1990 | EP0371385A1 Method and apparatus for treating waste material |
| 06/05/1990 | US4931190 Flocculating agent combinations for mineral slime filtration systems |
| 05/31/1990 | WO1990005703A1 Treatment of sludge |
| 05/31/1990 | DE3840123A1 Aerobic biological waste-water purification |
| 05/31/1990 | DE3840059A1 Method for further processing waste products from the purification of waste water, process water and exhaust air and use thereof in the agricultural sector |
| 05/31/1990 | DE3839830A1 Process for disposing of or treating sewage sludge |
| 05/30/1990 | EP0370019A1 Preparation of free-flowing solids from aqueous waste |
| 05/29/1990 | CA2003606A1 Method and apparatus for treating waste material |
| 05/29/1990 | CA1269768A1 Method and apparatus for disposal of a broad spectrum of waste featuring oxidation of waste |
| 05/29/1990 | CA1269676A1 Solidification process for residual sludges |
| 05/27/1990 | CA2003200A1 Flocculating agent combinations for mineral slime filtration systems |
| 05/23/1990 | EP0369946A1 Process for immobilizing wastes |
| 05/23/1990 | DE3838894A1 Waste disposal system which is composed of displaceable components |
| 05/23/1990 | CN1008099B Process for preparation of thermoplastic mass |
| 05/22/1990 | US4927530 Apparatus for processing sludge |
| 05/22/1990 | US4926764 Sewage sludge treatment system |
| 05/17/1990 | WO1990005272A1 Rotary dryer and associated drying plant |
| 05/16/1990 | EP0368147A1 Process and apparatus for treating organic sludge |
| 05/16/1990 | EP0367764A1 Process for disposal, and in particular hygienic treatment, of the sludge formed in a clarification plant. |
| 05/16/1990 | CN1042135A Movable cover hydraulic sewage gas unit |
| 05/15/1990 | US4925571 Heating |
| 05/15/1990 | US4925565 Process for extracting and disposing of nitrophenolic by-products |
| 05/15/1990 | US4925540 Catalytic oxidation to produce hydrogen |
| 05/08/1990 | US4923604 Chemical reformer |
| 05/07/1990 | CA2002342A1 Method for purification of waste water |
| 05/03/1990 | DE3905227C1 Heat exchangers for sewage sludge |
| 05/03/1990 | DE3836906A1 Process for treating sewage sludge |
| 05/02/1990 | CN1041745A Rural methane generating pit convenient for making gas and fertilizer and building it |
| 05/01/1990 | US4921538 Method for recycle and use of contaminated soil and sludge |
| 04/24/1990 | US4919775 Circulating currents carry gas bubbles and flocs to surface; breaking bubbles by sprinkling them with sludge; efficiency |
| 04/24/1990 | US4919763 Apparatus for converting sewage sludge filter cake by pyrolysis |
| 04/19/1990 | DE3934085A1 Disposal of heavy metal-contg. solids and liquids - using hydraulic binder giving low water permeability prod. |
| 04/18/1990 | EP0363429A1 Process for chemical stabilization of heavy metal bearing dusts and sludges, such as eaf dust. |
| 04/17/1990 | US4917733 Mixture of fly ash and kilm dust |
| 04/11/1990 | EP0363258A1 A method for treating organic waste material and an oxidation catalyst/cocatalyst composition useful therefor |
| 04/11/1990 | EP0362978A1 Process for treating caustic cyanide metal wastes |
| 04/11/1990 | CN1041147A Human-excrement concentrator and the exploitation and utilization of the resource of urban human excrements |
| 04/11/1990 | CN1007495B Wet processing method of boron-lime mud podwer |
| 04/10/1990 | US4915840 Sewage treatment; pollution control; hydrolyzing, degestion |
| 04/05/1990 | WO1990003230A1 Solid waste retriever |
| 04/05/1990 | WO1990003104A2 Method and plant for treating organically charged sewage |
| 04/05/1990 | DE3932979A1 Disposal of waste water from cellulose pulp factory - by precipitating organic chlorine cpds. as lime sludge, biologically clearing water, and burning combined sludges |
| 04/05/1990 | DE3833217A1 Process and apparatuses for decreasing the harmful action of pollutants, hazardous substances and/or toxic substances in landfills, deposits, soils and/or sludges |
| 04/05/1990 | DE3833054A1 Verfahren zur aufbereitung von teichschlamm (flotationsabgaengen) und aufbereitungsanlage Process for the preparation of pond sludge (flotation tailings) and treatment plant |
| 04/04/1990 | EP0360982A2 Component used for a fertilizer mixture or such like |
| 04/04/1990 | CN1040972A In-situ formation of soluble silicates from biogenetic silica in chemical fixation/solidification treatment of wastes |
| 04/04/1990 | CN1040969A Technology for mesophilic digestion and high-temp. process of city excrement |
| 04/03/1990 | US4913771 Method for dewatering sludge or slurry |
| 04/03/1990 | US4913585 Method of treating solids containing waste fluid |
| 03/27/1990 | US4911757 Calcium aluminum silicate |
| 03/22/1990 | DE3919176A1 Anaerobic breakdown of sludge - by solubilisation of sludge, feeding to anaerobic putrefaction tank etc. |
| 03/22/1990 | DE3831734A1 Method of utilising waste materials |
| 03/21/1990 | EP0359025A1 Process for the mesophilic or thermophilic aerobic-enzymatic conditioning of organic substances and biomasses |
| 03/21/1990 | CN1040512A Method of coagulating sludge |
| 03/20/1990 | US4909899 Method of concentrating sludges |
| 03/20/1990 | US4909825 Process and apparatus for drying and conditioning chicken manure or similar pasty substances |
| 03/15/1990 | DE3830259A1 Process for thermal disposal of waste materials containing elements which pollute the environment |
| 03/14/1990 | EP0357954A1 Process for heat recovery during sludge treatment |
| 03/14/1990 | CN2054366U Treating tower for sludge |
| 03/13/1990 | CA1266573A1 Soil and industrial waste decontamination |
| 03/07/1990 | EP0356879A1 Fluidized-bed reactor for biological waste water purification |
| 03/07/1990 | EP0356781A1 Process for treating organic material |
| 03/07/1990 | CN1040263A Apparatus and process for generating steam from wet fuel |
| 03/06/1990 | US4906388 Sewage sludge dewatering process |
| 03/06/1990 | US4906135 Method and apparatus for salt dome storage of hazardous waste |
| 03/06/1990 | US4905614 Method for thermic disposal of waste materials |
| 03/01/1990 | DE3828775A1 Process and device for dewatering sludge, in particular mud from rivers, harbours or the like |
| 02/27/1990 | US4904388 Process for sludge thickening |
| 02/22/1990 | WO1990001663A1 A process and an apparatus for drying wet fuel |
| 02/20/1990 | US4902431 Method for treating wastewater sludge |
| 02/20/1990 | US4901654 Deodorization and cleaning of medium temperature wet off-gases derived from burning of wet waste sludge |
| 02/08/1990 | DE3826520A1 Process and apparatus for the pyrolysis of sewage sludge |
| 02/06/1990 | US4898107 Pressurized wet combustion of wastes in the vapor phase |