| Patents for C02F 9 - Multistep treatment of water, waste water or sewage (41,429) |
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| 06/07/1989 | EP0319260A2 The removal of ammonium salts from an aqueous medium containing the salt |
| 06/07/1989 | CN2038905U Multifunctional water treatment device |
| 06/07/1989 | CN1033244A Process of treating acidic water |
| 06/06/1989 | US4836929 Process for breaking down organic substances and/or microbes in pretreated feed water for high-purity water recirculation systems |
| 06/06/1989 | US4836921 Waste water treatment apparatus |
| 05/31/1989 | EP0317553A1 Process for treating pollutant effluent, particularly in the tanning industry, and plant for implementing the process. |
| 05/30/1989 | US4834836 Method and apparatus for pollution control of liquid wastes |
| 05/24/1989 | EP0317525A1 A method of removing heavy metals from waste liquids discharged by dental surgery equipment, and a device for the implementation of such a method |
| 05/24/1989 | EP0316687A1 Water treatment apparatus |
| 05/24/1989 | EP0194290B1 Waste treatment method and device |
| 05/23/1989 | US4832854 Apparatus and process to separate and remove extraneous matter from a liquid stream |
| 05/23/1989 | CA1254554A1 Method of removing lignin from bleach plant effluents |
| 05/17/1989 | EP0315713A1 Process and installation for the treatment of waste water arising from the maintenance of livestock. |
| 05/16/1989 | US4830755 Pumping oil to storage, water to separator; separating oil; filtering water |
| 05/16/1989 | CA1254312A1 Apparatus for water purification |
| 05/10/1989 | CN1032773A Full water treatment apparatus for use in soft drink dispensing system |
| 05/09/1989 | US4828717 Device and method for reducing volume of aqueous waste effluents |
| 05/09/1989 | US4828709 Recirculating shower using limited water supply |
| 05/09/1989 | US4828691 Submersible purification system for radioactive water |
| 05/09/1989 | US4828577 Dewatering, containing fats and proteins, for self-sustained gasifiers |
| 05/09/1989 | US4827727 Carcass chiller and sterilizer |
| 05/09/1989 | CA1253981A1 Method for purifying aqueous solutions |
| 05/03/1989 | EP0313633A1 Method and apparatus for treating water, water treated thus obtained and its utilization. |
| 05/03/1989 | EP0209533B1 Process and system for the flocculation substances which can be flocculated in suspensions, especially for cleaning the discharge water of deinking plant |
| 05/03/1989 | DE3835965A1 Verfahren zum entsalzen von salzhaltigem wasser, insbesondere von grubenwasser A method of desalinating salt-containing water, especially mine water |
| 05/03/1989 | CN2036947U Small domestic sewage treatment device |
| 05/02/1989 | US4826605 Regenerating a caustic etch solution |
| 04/27/1989 | DE3814906C1 Process and apparatus for sterilising conveyor belts in beverage packaging plants |
| 04/25/1989 | US4824577 Phenol, melamine, formaldehyde removal process |
| 04/25/1989 | US4824575 Ion-exchanging |
| 04/20/1989 | WO1989003369A1 Improved process and equipment for purifying treatment and utilization of waste-waters from the dairy industry |
| 04/19/1989 | EP0312079A2 Full water treatment apparatus for use in soft drink dispensing systems |
| 04/13/1989 | DE3732329A1 Process for treating heavy-metal-containing waste waters |
| 04/06/1989 | WO1989002873A1 Water treating apparatus |
| 04/05/1989 | EP0310264A2 Paper conversion plant waste treatment process |
| 04/05/1989 | EP0309546A1 Water purification system with purified water cooling apparatus |
| 04/04/1989 | US4818416 To correct chemical, biological or other imbalances, dispensing treatment agent based on volume passed over and detected by boat or vesel |
| 03/28/1989 | US4816164 Paper conversion plant waste treatment process |
| 03/23/1989 | WO1989002481A1 Process and device for processing hydroxide sludges |
| 03/23/1989 | DE3729913A1 Verfahren und vorrichtung zur aufarbeitung von hydroxidschlaemmen Method and device for regeneration treatment of hydroxidschlaemmen |
| 03/21/1989 | US4814091 Process for removing metals from water |
| 03/16/1989 | DE3830344A1 Process and apparatus for waste water purification |
| 03/15/1989 | CN2034170U 净水器 Water Purifier |
| 03/14/1989 | US4812237 For household use |
| 03/14/1989 | US4812207 Using cellulose fibers |
| 03/07/1989 | US4810388 Manually operable pump |
| 03/02/1989 | DE3727344A1 Process and process arrangement for the multistage treatment of highly polluted waste waters by pressure-release flotation and downstream adsorption |
| 03/02/1989 | DE3719675A1 Treatment plant for pure water, in particular in modular form |
| 03/01/1989 | CN2033399U Biol-mineralization water soften device |
| 02/28/1989 | US4808316 Process for treating waste water containing uranium and fluorine |
| 02/28/1989 | US4808287 Water purification process |
| 02/23/1989 | WO1989001361A1 Water purification apparatus |
| 02/23/1989 | WO1989001357A1 Clarification process |
| 02/21/1989 | US4806244 Combined membrane and sorption process for selective ion removal |
| 02/16/1989 | DE3725924A1 Method for processing metal-containing rinse waters, especially rinse waters from electroplating |
| 02/09/1989 | DE3725297A1 Process for removing heavy metals from sludge liquors, sludges and waters containing cyanides or modified isonitriles |
| 02/08/1989 | EP0302293A1 Process for purifying solids and liquids |
| 02/07/1989 | US4802995 Method for decomposing the cyanide radical in cyanide-bearing wastes or materials |
| 02/07/1989 | US4802993 Method of treating liquid wastes containing heavy metal chelate compounds |
| 02/07/1989 | CA1249885A1 Membrane processes for metal recovery and pollution control in metal process industries |
| 01/31/1989 | CA1249577A1 .alpha. OLEFIN SULFONATES AS CONVEYOR LUBRICANTS |
| 01/26/1989 | DE3723375A1 Process for treating aqueous solutions from fur and hide preservation and from slaughterhouses and carcass utilisation plants |
| 01/19/1989 | DE3808088A1 Process for separating off heavy metal ions from industrial waste waters |
| 01/18/1989 | CN2031001U Sewage purification device for polybasic and monomer substances |
| 01/18/1989 | CN1030395A Method of and arrangement for purifying contaminated water |
| 01/12/1989 | WO1989000149A1 Effluent treatment of waste water |
| 01/11/1989 | EP0298253A2 Method of separating heavy metal ions from industrial-waste waters |
| 01/10/1989 | US4797433 Utilization of melamine waste effluent |
| 01/05/1989 | DE3721141A1 Process for mercury recovery from mercury-containing scrubbing waters of incineration plants |
| 01/04/1989 | CN1030066A Process and equipments for treating waste liquor of red nitric acid |
| 01/03/1989 | CA1248247A1 Method for removing heavy metals from aqueous solutions by coprecipitation |
| 12/29/1988 | WO1988010239A1 Process and apparatus for producing drinking water |
| 12/27/1988 | US4793933 Waste treatment method for metal hydroxide electroplating sludges |
| 12/21/1988 | EP0296043A1 Heat-welded or adhesive-bonded unitary construction cartridge for the production of ultrapure water |
| 12/15/1988 | WO1988009740A1 Sewage treatment plant |
| 12/13/1988 | US4790943 Renovation of used water from poultry processing plants |
| 12/13/1988 | US4790940 Process for wastewater treatment |
| 12/12/1988 | EP0238639A4 Method of treating fluids. |
| 12/06/1988 | US4789484 Treatment of electroless nickel plating baths |
| 12/06/1988 | US4789478 Mixed culture of citrobacter and sulfate reducer |
| 12/01/1988 | WO1988009308A1 Method of and arrangement for purifying contaminated water |
| 12/01/1988 | WO1988009226A1 Method and apparatus for cleaning freight containers as well as for treating and circulating the fluids used |
| 11/29/1988 | US4787980 Continuous sampling, analyzing; multiplex units, electronic controller; for industry |
| 11/29/1988 | US4787978 Method for the purification of waste water, notably of urban waste water |
| 11/22/1988 | US4786417 Management of photoresist materials containing waste solution |
| 11/17/1988 | WO1988008737A1 Method and apparatus for treating water, water treated thus obtained and its utilization |
| 11/17/1988 | EP0290488A1 Treatment of waste and a rotary kiln therefor. |
| 11/10/1988 | DE3813264A1 Process and apparatus for purifying waste waters arising in dental treatments |
| 11/10/1988 | DE3714200A1 Arrangement having a filter and an electrolytic sterilisation device for drinking water treatment |
| 11/08/1988 | US4783263 Detoxification process |
| 11/03/1988 | WO1988008408A1 System and method for the extraction of cyanide from tails liquor |
| 11/03/1988 | DE3713103A1 Removing phenol cpds. or chloro-aromatics from waste water - by polymerising with phenol-oxidising enzyme and pptn. with polyimine |
| 11/01/1988 | US4781810 Electrolysis of sodium chloride |
| 11/01/1988 | US4781806 Electroplating system |
| 11/01/1988 | CA1244152A1 Phosphoric acid/lime hazardous waste detoxification treatment process |
| 10/26/1988 | EP0287881A1 Method of treating waste waters from agricultural plants, particularly liquid manure |
| 10/25/1988 | US4780214 Addition of selenium compound in biodegradable carrier material |
| 10/25/1988 | US4780201 Waste water separator with hydrocyclone, constructive collection passageway and skimmer for separation of flotable contaminants |
| 10/25/1988 | US4780200 Water purification apparatus |
| 10/19/1988 | EP0286955A2 Process for reducing the phenol content in phenol-containing water |