| Patents for B01D 21 - Separation of suspended solid particles from liquids by sedimentation (18,338) |
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| 04/05/1994 | CA1328230C Versatile filtering apparatus |
| 03/31/1994 | DE4308584C1 Sewage plant clearing appts. with rack drive - comprises horizontal rack on or at the reservoir edge, adjustable pinion on carriage and pinion balance wt. |
| 03/31/1994 | DE4232346A1 Measuring the amount of sludge, liquid fuel or oil in a sepn. tank - includes air pearling sensor fixed to float of limited movement range, reducing complexity of sensor installation and tubes, enhancing results, etc. |
| 03/30/1994 | EP0588820A1 Liquid treatment. |
| 03/30/1994 | CN1084495A Process for recovery and use of overflow buck in concentration tank |
| 03/30/1994 | CN1084494A High-efficient pulse settling pond |
| 03/30/1994 | CN1084493A Method of preparing low-iron barium hydroxide |
| 03/29/1994 | US5298176 Controlled velocity settling tank |
| 03/29/1994 | US5298172 Method and apparatus for removing grit from sewage |
| 03/24/1994 | DE4231880A1 Vehicle washing station waste water cleaning assembly |
| 03/24/1994 | DE4231790A1 Vehicle washing station waste water cleaning - has angled blades for water to flow upwards to separate floating matter |
| 03/24/1994 | DE4231255A1 Floating sludge removal - using fixed take=off trough and moving shield to displace floating matter into trough and retracting and lowering for further matter to float in |
| 03/23/1994 | EP0588035A2 Separator for with oil and fat polluted sewage |
| 03/23/1994 | EP0587832A1 Method for testing blood units for viral contamination |
| 03/23/1994 | CN1084140A Method for prepn. of compound polyaluminum chloride |
| 03/22/1994 | US5296470 Polydextrose backbone with grafted water soluble unsaturated monomer |
| 03/22/1994 | US5296213 Polymeric aluminum silicate-sulphate and process for producing same |
| 03/22/1994 | US5296149 Water treatment apparatus |
| 03/17/1994 | WO1994005601A1 Immiscible liquids separator apparatus and method |
| 03/16/1994 | EP0586998A1 Process and device for the treatment of waste water containing organic matter, especially chlorinated organic compounds from the production of epichlorohydrine |
| 03/15/1994 | US5294352 Polymer alloy |
| 03/15/1994 | CA2078165A1 Gravity thickener for sludges resulting from the physicochemical treatment of wastewater |
| 03/09/1994 | EP0585318A1 Batch process and apparatus. |
| 03/08/1994 | CA1327542C Buoyant coarse media flocculator |
| 03/08/1994 | CA1327482C Pump for filtration systems |
| 03/04/1994 | WO1993004759A1 Wastewater treatment process |
| 03/03/1994 | WO1994004464A1 Method and device for the separation of a contaminated top layer |
| 03/03/1994 | WO1994004462A1 Polymeric aluminium silicate-sulphate and process and apparatus for producing same |
| 03/03/1994 | WO1994004242A1 Processing plant for waste water treatment |
| 03/03/1994 | DE4237126C1 Cover for round or rectangular pond for sewage works - includes covering metal sheet unit extending over pond edges, support rail arrangement and cleaning mechanism |
| 03/03/1994 | DE4228387A1 Domestic sewage outflow - has sepn. of solid and fluid phases to allow only fluid to pass through collection channel into the sewage disposal system |
| 03/03/1994 | CA2142268A1 Processing plant for waste water treatment |
| 03/02/1994 | EP0585103A2 Process for treating a suspension of solid particles in a carrier liquid |
| 03/02/1994 | EP0584380A1 Separator for waste waters polluted with directly separable floating matters |
| 03/02/1994 | EP0584305A1 Method for purifying a non-electrically conductive liquid |
| 03/01/1994 | US5290456 Filter plate for removing hydrocarbons and other contaminants from solutions and gases |
| 03/01/1994 | CA1327412C Waste water treatment system |
| 02/24/1994 | DE4226709A1 Waste water tank with water overflow edge - has sound proofing cover fitted over spillway |
| 02/22/1994 | US5288415 By centrifugal force; bacteria, fungi, insects, mammalian cells |
| 02/22/1994 | US5288404 Sedimentation |
| 02/17/1994 | WO1994003253A1 Method and apparatus for separating solids from liquid containing same |
| 02/17/1994 | WO1994003252A1 Process and device for clarifying liquids |
| 02/17/1994 | DE4226570A1 Aufbereitungsanlage für die Behandlung von Abwässern Treatment plant for waste water treatment |
| 02/16/1994 | CN2156180Y Rotary drop dirt remover |
| 02/16/1994 | CN1082121A Method for treating pickle liquor |
| 02/16/1994 | CN1082006A Polymeric aluminum silicate-sulphate and process for producing same |
| 02/16/1994 | CN1023793C Polysilicate flocculant and preparing process thereof |
| 02/15/1994 | US5286806 Methods of making and using high molecular weight acrylamide polymers |
| 02/15/1994 | US5286390 Method for treating deink wastes using melamine aldehyde-type polymers |
| 02/15/1994 | US5286384 Sludge scraper apparatus |
| 02/10/1994 | DE4225957A1 Verfahren zum Reinigen von Flüssigkeiten und Vorrichtung zum Durchführen dieses Verfahrens A method for cleaning liquids and device for carrying out this method |
| 02/09/1994 | EP0582314A2 Method and apparatus for separation by agglomeration |
| 02/08/1994 | US5284634 Purification of Bayer process liquors using cationic polymeric quaternary ammonium salts |
| 02/03/1994 | WO1994002251A1 Device for centrically charging circular tanks |
| 02/03/1994 | WO1994002228A1 Wastewater collection system for a sewage system |
| 02/03/1994 | CA2140335A1 Wastewater collection system for a sewage system |
| 02/03/1994 | CA2119238A1 Device for centrically charging circular tanks |
| 02/02/1994 | EP0581002A2 Use of blends of mannich acrylamide polymers and quaternary polyamines for flocculating enzyme broth streams |
| 02/01/1994 | US5282982 Blood washing method |
| 02/01/1994 | US5282487 Flow control system |
| 01/31/1994 | CA2101469A1 Use of blends of mannich acrylamide polymers and quaternary polyamines for flocculating enzyme broth streams |
| 01/29/1994 | CA2080939A1 Fluid treatment process using dynamic microfiltration and ultrafiltration |
| 01/27/1994 | DE4320980A1 Waste water cleaning assembly - has insert in concrete container to separate grease and oil from vehicle washing station waste water |
| 01/27/1994 | DE4224047A1 Vorrichtung zur zentrischen Beschickung von Rundsandfängen und Sandklassierern in Rundbauweise Device for the central charging of circular grit traps and grit classifiers of circular construction |
| 01/27/1994 | DE4223832A1 Recovering contaminated machining lubricants and cooling liq. |
| 01/26/1994 | EP0579705A1 Separator for liquid/solid mixtures. |
| 01/26/1994 | EP0579700A1 Separator for liquid/solid mixtures. |
| 01/26/1994 | CN2154110Y W-shape oblique tube for water treatment and its combined device |
| 01/25/1994 | CA1326581C Compositions of inorganic-organic alloy with high charged nitrogen content polymers and their manufacture |
| 01/20/1994 | WO1994001370A1 Sludge dehydrating agent |
| 01/20/1994 | WO1994001368A1 Process and system for purifying waste water |
| 01/20/1994 | WO1994001192A1 Sludge scraping up apparatus |
| 01/20/1994 | WO1994001191A1 Submerged scraper for round settling pools |
| 01/20/1994 | CA2140141A1 Automated system and method for processing biological fluid |
| 01/20/1994 | CA2139412A1 Process and system for purifying waste water |
| 01/19/1994 | EP0515570B1 Device for aerobic purification of waste water |
| 01/13/1994 | DE4327235A1 Water treatment overflow pipe assembly - has folding membrane giving flow independent of water depth and preventing sludge blockages |
| 01/13/1994 | DE4222559A1 Unterwasserräumer für Rundklärbecken Underwater clearing for circular clarifiers |
| 01/12/1994 | EP0578032A2 Sewage treatment plant working process and device for injecting phosphates precipitation products |
| 01/12/1994 | EP0577948A2 Plant for separating floating and/or suspended matters from contaminated waste waters |
| 01/11/1994 | US5277806 Liquid clarifier |
| 01/11/1994 | US5277803 Water clarification method and apparatus |
| 01/11/1994 | CA1325982C Filter bed clarifier |
| 01/06/1994 | WO1994000757A1 Phase partition separation method |
| 01/06/1994 | WO1994000747A1 Separating device for separating a flow of analysis samples from waste water |
| 01/06/1994 | WO1994000216A1 Passive circulation in electrolytic fluid treatment systems |
| 01/06/1994 | CA2138162A1 Passive circulation in electrolytic fluid treatment systems |
| 01/05/1994 | DE4321093A1 Soiled water cleaning - has a sieve filling chamber at basin to trap solid concrete residue for removal and recovery by a screw conveyor |
| 01/05/1994 | DE4307046A1 Car wash water cleaner - has container and sepn. systems to recirculate water without sludge basins and purificn. plant |
| 01/05/1994 | DE4220897A1 Trennvorrichtung zur Abscheidung eines Analysenprobenstroms Separation device for separating an analytical sample stream |
| 01/03/1994 | CA2099472A1 Coagulation-flocculation process |
| 12/29/1993 | EP0575567A1 Wastewater treatment process. |
| 12/29/1993 | CN2150911Y Centrifugal vibrating micro-mesh |
| 12/29/1993 | CN1079945A Inorganic compounded flocculante for water treatment and its preparation |
| 12/28/1993 | US5273647 Negative pressure hydrocyclone separation method and apparatus |
| 12/23/1993 | WO1993025295A1 System for treating transition zone material |
| 12/22/1993 | EP0574984A1 Method and plant for the purification of fluid containing sludge from painting processes |
| 12/22/1993 | CN2149954Y Slurry screen-separating machine |
| 12/21/1993 | USRE34486 Compositions of inorganic-organic alloy with highly charged nitrogen content polymers and their manufacture |
| 12/21/1993 | US5271832 Activation plant with funnel-shaped secondary sedimentation |