| Patents for B01D 21 - Separation of suspended solid particles from liquids by sedimentation (18,338) |
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| 09/19/1990 | EP0387262A1 Separator. |
| 09/18/1990 | US4957977 Modified n-vinylformamide-(meth)acrylonitrile copolymer, paper strength increaser, papermaking drainage and retention aid |
| 09/18/1990 | US4957628 Apparatus for gravity separation of particles from liquid |
| 09/18/1990 | US4957622 Apparatus for removing sediment from ponds |
| 09/18/1990 | US4957621 Baffle plate for water purification reservoir |
| 09/12/1990 | EP0387082A2 Tape drive with self-expanding coils for sludge collector |
| 09/12/1990 | EP0386004A1 Cell block collection method and apparatus. |
| 09/12/1990 | EP0385972A1 Method for improving the utilization of polyelectrolytes in dewatering aqueous suspensions. |
| 09/12/1990 | CN1009528B Flocculent for purifying waste liquor of print and dye |
| 09/11/1990 | US4956100 Water pollution, removing floating matter |
| 09/11/1990 | CA1273888A1 Flocculant for bitumen tailings |
| 09/07/1990 | WO1990009834A1 Device for removing bottom and surface sludge from sewage-treatment basins or the like |
| 09/06/1990 | DE3906614A1 Vorrichtung zum abziehen von boden- oder schwimmschlamm aus einem klaerbecken oder dergleichen Apparatus for pull from ground or floating sludge from a clarifier or the like |
| 09/05/1990 | EP0385150A2 Method for controlling reservoir cleaning and emptying devices |
| 09/05/1990 | EP0377603A4 Clarification process |
| 09/05/1990 | EP0258359B1 Method of separating a medium in different components by means of gravity |
| 09/05/1990 | CN1009457B Method for processing industrial waste liquors with coagulating deposition |
| 09/04/1990 | US4954265 Removal of nickel and copper |
| 09/04/1990 | US4954259 Process for the treatment and purification of water by the flocculation of suspended particles in a fluidized bed |
| 09/03/1990 | WO1990009833A1 Method for separating oil and water emulsions |
| 08/29/1990 | EP0384457A1 Apparatus for the separation of non-miscible liquids |
| 08/29/1990 | EP0384242A1 Process and apparatus for the treatment of glass-containing cooling water |
| 08/29/1990 | EP0383878A1 Device for removing bottom sludge and/or floating sludge from circular settling basins. |
| 08/28/1990 | US4952310 Intrachannel clarifier |
| 08/24/1990 | WO1990009835A1 Flocculating apparatus |
| 08/23/1990 | DE3904698A1 Method for processing animal raw materials |
| 08/22/1990 | EP0383674A1 Process and installation for the biological treatment of waste water containing nitrogen, especially for nitrification and/or denitrification |
| 08/22/1990 | CA2007987A1 Alkylation catalyst isolation |
| 08/21/1990 | US4950908 Flocculant control system |
| 08/21/1990 | US4950406 Flow adjusting vane for intra-channel clarifier |
| 08/21/1990 | US4950398 Cantilevered flight attachment for non-metallic chain |
| 08/21/1990 | US4950389 Gravity concentrator |
| 08/21/1990 | CA1273131A1 Process for water treatment and purification through flocculation of suspended solids on a fluidised bed |
| 08/21/1990 | CA1272965A1 Water treatment plastic products for rectangular clarifiers |
| 08/17/1990 | WO1990009222A1 Clarification process |
| 08/17/1990 | CA2046901A1 Clarification process |
| 08/15/1990 | CN1044637A Production method of polymeric compounded flocculant |
| 08/14/1990 | US4948518 Method of separating a suspension of activated sludge and sewage water |
| 08/14/1990 | US4948493 Enclosure surrrounding the tank containing oil; heating, adding a coagulant, precipitating impurities |
| 08/14/1990 | CA2010088A1 Process and installation for biological treatment, e.g. by nitrification and/or denitrification, of an effluent including nitrated pollution |
| 08/08/1990 | EP0380818A1 Fuel purifying apparatus |
| 08/01/1990 | EP0380194A1 Controlling particulate material |
| 07/31/1990 | US4944886 Method of sewage treatment |
| 07/18/1990 | EP0377603A1 Clarification process. |
| 07/18/1990 | CN2059436U Advection-type precipitator |
| 07/18/1990 | CN1043884A Manufacturing method of aluminium-irons and irons solid water cleaning agent |
| 07/17/1990 | US4941977 Cross-flow separator for separating component suspended in a liquid |
| 07/11/1990 | WO1990008738A1 Process for preparing basic aluminum compounds |
| 07/11/1990 | EP0377028A1 Process for dewatering sludge |
| 07/11/1990 | CA2025353A1 Process for preparing basic aluminum compounds |
| 07/10/1990 | US4940545 Aerobic waste sludge digester-thickener orbital system and method |
| 07/10/1990 | US4940539 Grease trap construction |
| 07/05/1990 | DE3941016A1 Cyclone filter - having housing, deflection plates, screw conduit, partition wall, central opening, slots, screw-insert, pptn. chamber etc. |
| 07/04/1990 | EP0376813A1 Process for water purification using a polymeric flocculant |
| 07/04/1990 | CN1008604B Ultrasonic vibrator tray processes and apparatus |
| 07/03/1990 | US4938876 Method for separating oil and water emulsions |
| 07/03/1990 | EP0385972A4 Method for improving the utilization of polyelectrolytes in dewatering aqueous suspensions. |
| 06/28/1990 | CA2006795A1 Polymeric flocculent water purifying process |
| 06/27/1990 | EP0375671A1 Separation of components of a fluid mixture |
| 06/27/1990 | EP0374458A2 High performance polymer flocculating agents |
| 06/27/1990 | CN1043298A Separation process |
| 06/26/1990 | US4936982 Intrachannel clarifier |
| 06/21/1990 | DE3940444A1 Pivoting brush for engaging radial discharge tube surface - in sewage sedimentation tank is suspended from slider below rotating arm |
| 06/21/1990 | DE3940118A1 Slurry distribution into cells around cylinder perimeter - by arm rotated in horizontal plane above cells |
| 06/19/1990 | US4935221 Simultaneous solidificaation of sulfur while avoiding plugging |
| 06/14/1990 | WO1990006336A1 Polyelectrolytes modified by reaction with anhydride group containing copolymers and their use as flocculents |
| 06/14/1990 | CA2004746A1 Slurry distribution apparatus |
| 06/13/1990 | EP0372715A1 Polymeric basic aluminum silicate-sulphate |
| 06/13/1990 | EP0372016A1 Method in the processing of aluminium and the use of certain acids in oils therefor. |
| 06/13/1990 | DE3841198A1 Apparatus for oil separation |
| 06/13/1990 | CN1008326B Hydraulic mixing fluccolation installation for controlling the energy consumption of turbulent flow |
| 06/12/1990 | US4933524 Clarifier apparatus and methods with 3-D arrays |
| 06/12/1990 | US4933091 Salt of acrylic acid-ethylene copolymer |
| 06/07/1990 | DE3939880A1 Removing sludge from collected combustion fume washing - using inclined enclosed worm feeding with stoppages to permit drainage |
| 06/07/1990 | DE3840971A1 Process and device for making pumpable the floating layer in a low-density separator |
| 06/06/1990 | EP0371655A1 Plate separator for fluid mixtures |
| 06/05/1990 | US4931191 Method for separating solids from water using amine containing polymers |
| 06/05/1990 | US4931176 Installation for the separation of the constituents of a suspension |
| 06/05/1990 | US4931175 Water clarifying apparatus |
| 06/05/1990 | CA2004549A1 Separation process |
| 05/31/1990 | WO1990005706A1 Precipitant or flocculant for treatment of waste water and process involving their use |
| 05/31/1990 | CA2001894A1 Plate separator for fluid mixtures |
| 05/23/1990 | EP0369275A1 Precipitant or flocculant for treating waste water, and process using this agent |
| 05/23/1990 | CN1042340A Polymeric basic aluminium silicate-sulphate |
| 05/23/1990 | CN1008064B Tubular type water collection uniflow sedimentation device |
| 05/22/1990 | US4927545 Method and apparatus for automatic processing and analyzing of blood serum |
| 05/22/1990 | US4927543 Method and installation for treating liquid by sedimentation using fine sand |
| 05/22/1990 | US4927537 Tape drive with self-expanding coils for sludge collector |
| 05/22/1990 | CA1269493A1 Process for the improved separation of clarified liquid from biomass in the biological treatment of sewage |
| 05/17/1990 | WO1990005244A1 Horizontal removable pump for filtration systems |
| 05/17/1990 | WO1990005008A1 Process and device for separating particles |
| 05/15/1990 | US4925563 Liquid waste processing apparatus |
| 05/15/1990 | US4925553 Pressurized oil filter/carbon separator |
| 05/10/1990 | DE3837789A1 Circular sand trap for smaller and medium-sized hydroelectric power plants with tangential feed and centripetal outlet of the pure water (cyclone sand trap) |
| 05/10/1990 | DE3837707A1 Liquid container with discharge channel |
| 05/10/1990 | DE3837638A1 Method for taking off floating material from gravity separators |
| 05/10/1990 | DE3837284A1 Apparatus for scum removal in circular sedimentation tanks or the like |
| 05/10/1990 | DE3834891A1 Saugraeumer fuer rundklaerbecken Suction scraper for rundklaerbecken |
| 05/09/1990 | EP0366843A1 Flocculation of suspended solids from aqueous solutions |
| 05/09/1990 | CN1041927A Method of treating penicillin waste water |