| Patents for B01D 21 - Separation of suspended solid particles from liquids by sedimentation (18,338) |
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| 01/31/1991 | DE3924521A1 Floating water clarifier with improved performance - by providing end plates which partly close the sides of clarifier block, and separate holding tank from which clarified water is pumped away |
| 01/30/1991 | EP0328555B1 Method and device for separating a dispersed phase |
| 01/30/1991 | CN1011405B Process of treatment of para-benzene dicarbonic acid in waste water |
| 01/29/1991 | US4988448 Method for removing substances from a solution |
| 01/29/1991 | US4988441 Clarification apparatus |
| 01/29/1991 | US4988427 Liquid/solid separation unit |
| 01/22/1991 | US4986915 Tape drive with self-expanding coils for sludge collector |
| 01/22/1991 | US4986907 Fuel purifying apparatus |
| 01/22/1991 | US4986141 Tape drive with self-expanding coils for sludge collector |
| 01/22/1991 | CA1279292C Helical flow effluent weir |
| 01/16/1991 | CN1048532A Method for treating low turbidity waste sewage |
| 01/16/1991 | CN1048505A Separator for mud and water |
| 01/15/1991 | US4985146 Filtering system |
| 01/10/1991 | WO1991000164A1 Device for blasting with a moist granular agent |
| 01/09/1991 | EP0406999A1 Method of treating low-concentration turbid water |
| 01/09/1991 | EP0406406A1 Process for preparing basic aluminum compounds. |
| 01/09/1991 | EP0403590A4 Apparatus and methods for liquid treatment |
| 01/09/1991 | CN1048399A Highly concentrated aqeous suspension of minerals and/or fillers and/or pigments |
| 01/08/1991 | US4983295 Separator |
| 01/08/1991 | US4983294 Separator |
| 01/08/1991 | US4983285 Individual wastewater treatment plant |
| 01/08/1991 | US4983284 Heated sump assembly for a grease/oil separator |
| 01/08/1991 | US4983189 Propagating two acoustic waves of different frequencies, superimposing to form pseudo-standing acoustic waves |
| 01/03/1991 | DE3921374A1 Device for discontinuous cleaning of water contg. hydrocarbon(s) - and metals and/or solvents, in a cylindrical vessel contg. a skimmer, and agitator and separate dosing systems |
| 01/03/1991 | CA2014303A1 Method of treating low-concentration turbid water |
| 01/02/1991 | EP0405712A2 Protonated Mannich polymers |
| 01/02/1991 | EP0405169A2 Baffle plate thickener |
| 01/02/1991 | EP0241474B1 A scraping device in a settling basin |
| 01/01/1991 | US4981675 Polymeric basic aluminum silicate-sulphate |
| 12/31/1990 | WO1991000132A1 Protonated mannich polymers |
| 12/31/1990 | CA2035467A1 Protonated mannich polymers |
| 12/27/1990 | EP0404548A2 Separator |
| 12/27/1990 | EP0403590A1 Apparatus and method for liquid treatment. |
| 12/27/1990 | CA1278265C Sludge separation apparatus |
| 12/20/1990 | DE3919368A1 Device for purificn. of waste water - in which unit consisting of outer vessel contg. a number of conical inner vessels can encompass several different water treatment processes |
| 12/20/1990 | DE3919189A1 Handling mixt. of water and lacquer sludge - by withdrawing sludge from spray-painting booth by outlet funnel below water-sludge mixt. in receiving vessel beneath booth |
| 12/20/1990 | CA2019262A1 Sedimentation control process |
| 12/19/1990 | EP0402515A1 Process and sludge contact reactor for waste water treatment by pulsated flocculation and separation |
| 12/19/1990 | CN1047811A Alkylation catalyst isolation |
| 12/18/1990 | US4978447 Self-propelled apparatus for cleaning a water treatment tank |
| 12/13/1990 | WO1990015256A1 Curved fluid translation systems |
| 12/13/1990 | WO1990015183A1 Method of and apparatus for separating heavy impurities from fiber suspensions in connection with pumping |
| 12/13/1990 | DE4018162A1 Aq. mineral, filler or pigment slurry with high solids content |
| 12/13/1990 | DE4017229A1 Purifying lubricant during non-turbulent movement - between corrugated plate stacks with terminal diffusors providing multiple equal flows |
| 12/13/1990 | DE3918803A1 Cleaning surface water - where rain-water etc. is cleaned in system consisting of sedimentation stage, sepn. of floating matter and biological filtration |
| 12/12/1990 | EP0401790A2 Highly concentrated aqueous slurry of minerals and/or fillers and/or pigments |
| 12/12/1990 | CN1010747B Model of filtering chamber with floating filter medium |
| 12/11/1990 | US4976875 Method of and apparatus for separating a medium in different components by means of gravity |
| 12/11/1990 | US4976851 Liquid separator |
| 12/11/1990 | CA1277785C Flocculation processes |
| 12/05/1990 | EP0400977A1 Ultrasonic systems |
| 12/05/1990 | EP0400431A2 Separation unit |
| 12/05/1990 | EP0400129A1 Polyelectrolytes modified by reaction with anhydride group containing copolymers and their use as flocculents |
| 12/05/1990 | EP0400115A1 Process and device for separating particles. |
| 12/04/1990 | US4975205 Apparatus and method for receiving, draining and disposing of dredged material |
| 12/04/1990 | US4975184 Horizontal removable pump for filtration systems |
| 12/04/1990 | CA1277449C Flocculation processes |
| 11/28/1990 | CN1047214A Method for preparing separating agent of shaped components in blood |
| 11/27/1990 | US4973402 Flow restrictor and strainer assembly for a toilet tank fill valve and the like |
| 11/22/1990 | EP0397864A1 Agglutination reaction vessel |
| 11/21/1990 | CN1047039A Separating agent for visible component of blood |
| 11/20/1990 | US4971693 Muddy water processing apparatus |
| 11/14/1990 | EP0396601A1 Filtration assembly comprising a pump |
| 11/13/1990 | CA1276325C Two-stage clarification process and device for liquids containing solids |
| 11/12/1990 | CA2016702A1 Procedure to recover plastic materials and the like and equipment to achieve such a result |
| 11/07/1990 | CN1046725A Pre-precipitator for extra-high turbid water |
| 10/31/1990 | EP0395567A1 Process for the treatment of waste water from food processing plants |
| 10/31/1990 | EP0395502A1 Cleaning device for sedimentation basins |
| 10/31/1990 | EP0125306B1 Improved clarifier/thickener |
| 10/30/1990 | US4966714 Flocculation, separation of latex or synthetic resins with mixture of calcium oxide, magnesium oxides and silica |
| 10/30/1990 | US4966713 Process for the treatment of waste water from food processing plants |
| 10/25/1990 | DE3912921A1 Biological water treatment process - has biological purificn. step, sedimentation step and controlled sludge recirculation step |
| 10/24/1990 | EP0393933A2 Paint detackification using an improved oil-in-water emulsion with dibasic esters |
| 10/24/1990 | CN2064361U Water clarifier for drinking water |
| 10/24/1990 | CN1046315A Preparation process of bentonite-complexed water cleaner (i-type) |
| 10/18/1990 | WO1990011813A1 Liquid processing apparatus, its continuous liquid processing apparatus and its continuous liquid processing method |
| 10/18/1990 | DE3904452A1 Mobile arrangement for treating waters, such as well water or surface water, waste water or liquid manure, ... |
| 10/17/1990 | EP0392434A2 Process for the evacuation of a separation tank and device for the separation of settling and/or floating materials from spent water |
| 10/17/1990 | CN1009990B Mg-fe compound type waste-water processing agent and its production method |
| 10/17/1990 | CA2007222A1 Paint detackification using an improved oil-in-water emulsion with dibasic ester |
| 10/16/1990 | US4963257 Buoyant coarse media flocculator |
| 10/16/1990 | US4963252 Decanter device |
| 10/16/1990 | CA1275263C Motorized surface scum skimmer for waste treatment apparatus |
| 10/16/1990 | CA1275243C Digester tank with foam control cover |
| 10/11/1990 | DE3911133A1 Sedimentation tank (clarifier) |
| 10/11/1990 | DE3910848A1 Device for regulating the discharge from an equalising tank, e.g. a stormwater retention tank |
| 10/10/1990 | EP0391089A2 Apparatus for producing annular fiber aggregate |
| 10/09/1990 | US4962268 Multicompartment separation vessel minimizes spillage |
| 10/09/1990 | US4961842 Siphon gravity classifier and clarifier |
| 10/04/1990 | WO1990011254A1 Device for purifying waste water |
| 10/03/1990 | EP0390575A1 Aerobic waste sludge digester-thickener orbital system and method |
| 10/03/1990 | EP0389880A2 Sedimentation reservoir, especially for waste water |
| 10/02/1990 | US4960525 Hydrocyclone for washing particles in liquid suspension |
| 10/02/1990 | US4960515 Liquid recovery system |
| 10/02/1990 | CA1274927A1 Flocculants for bauxite (red mud) |
| 09/26/1990 | EP0389248A1 Intrachannel clarifier |
| 09/25/1990 | US4959145 Gas baffle device for on-site waste disposal systems |
| 09/20/1990 | WO1990010597A1 Water purifying means |
| 09/20/1990 | DE3908216A1 Apparatus for cleaning sewers |
| 09/20/1990 | CA2011332A1 Intrachannel clarifier |