| Patents for B01D 21 - Separation of suspended solid particles from liquids by sedimentation (18,338) |
|---|
| 10/28/1991 | WO1991016981A1 Serpent sediment-sluicing system |
| 10/24/1991 | DE4012641A1 Waste-water settling tank - incorporates mechanical discharge of effluent using syphons to discharge effluent and to remove sludge |
| 10/22/1991 | US5059107 Apparatus for producing annular fiber aggregate |
| 10/22/1991 | US5059066 System and method for disposal of waste |
| 10/22/1991 | CA1291098C Lymphocyte collection tube |
| 10/22/1991 | CA1291001C Composition and method for flocculating and removing solids suspended inwater |
| 10/17/1991 | DE4105605A1 Pre-clarification of waste water contg. faecal material |
| 10/16/1991 | EP0451430A1 Plant to depollute waste water, particularly water from olive crushers |
| 10/16/1991 | EP0260303B1 Automatic flow-control device |
| 10/16/1991 | EP0233199B1 Disposable diagnostic plasma filter dispenser |
| 10/16/1991 | EP0223860B1 Germicidal and purifying agent for drinking water |
| 10/15/1991 | US5057219 Scum treating apparatus |
| 10/15/1991 | US5056651 Flight for collecting sludge by sweeping and roller shoe fixed thereto |
| 10/09/1991 | EP0450109A1 Liquid reservoir with a drain |
| 10/09/1991 | CN2086161U Continuous sewage precipitating-drainage device |
| 10/08/1991 | US5055200 Adding anionic, then cationic polymer, stirring and deflocculation |
| 10/03/1991 | WO1991014603A1 Process and installation for supplying (washing) water and use of filter papers therefor |
| 10/02/1991 | EP0449454A2 Precipitation apparatus and method |
| 10/02/1991 | EP0448926A2 Use of blends of mannich acrylamide polymers and dimethyldiallylammonium halide polymers for flocculating enzyme broth streams |
| 10/02/1991 | DE4000148A1 Appts. for decontaminating contaminated earth - by sepg. solids using high pressure water and air, washing solids with wash fluid floc-filtering obtd. colloidal dispersion, etc. |
| 10/01/1991 | US5053134 Centrifuging, separation using density gradients |
| 09/25/1991 | EP0448282A1 Separator |
| 09/25/1991 | CN1054757A High-effective composite coagulant and its manufacturing method |
| 09/24/1991 | US5051173 Device to remove oil from oil filter |
| 09/24/1991 | CA1289461C Ceramic packing and method and mold for making same |
| 09/19/1991 | WO1991014171A1 Turbidity measurement |
| 09/19/1991 | WO1991014053A1 Method and apparatus for removing grit from sewage |
| 09/19/1991 | WO1991013669A1 Clearing or sedimentation tank |
| 09/17/1991 | US5049278 Modular plate settler |
| 09/17/1991 | CA2037568A1 Separator |
| 09/15/1991 | WO1991013674A1 Particle manipulation in an ultrasonic field |
| 09/15/1991 | CA2076649A1 Particle manipulation in an ultrasonic field |
| 09/12/1991 | DE4106291A1 Controlled removal of sewage sludge from tank edge - with automatic allowance for different initial levels |
| 09/12/1991 | DE4023557A1 Controlling sludge removal from sewage settlement tank surface - in response to different surface levels acting on pivotal flap valve, movable by gravity-loaded lever |
| 09/12/1991 | DE4006925A1 Klaer- oder absetzbecken Sewage or dams |
| 09/12/1991 | DE4006924A1 Clarification or settling tank for water - where water overflows from tank into channel connected to clean water withdrawal line, and where scum is scraped to scum discharge |
| 09/10/1991 | US5047151 Scum skimming system for circular sedimentation and thickening tanks |
| 09/10/1991 | US5047150 Settled solids removal mechanism |
| 09/10/1991 | CA1288704C Sludge removing apparatus |
| 09/05/1991 | WO1991013033A1 Device for aerobic purification of waste water |
| 09/04/1991 | EP0445093A2 Settling apparatus |
| 08/28/1991 | EP0442951A1 Precipitant or flocculant for treatment of waste water and process involving their use |
| 08/28/1991 | EP0442944A1 Horizontal removable pump for filtration systems. |
| 08/28/1991 | EP0193565B1 Apparatus for clarification of water |
| 08/22/1991 | DE4005251A1 Removing suspended particles from liq. by settlement - while slowly moving through one compartment of interconnected series |
| 08/21/1991 | EP0218638B1 Pivot pin bearing for biomedical systems |
| 08/21/1991 | CA2036543A1 Liquid recycling system |
| 08/14/1991 | CN1053781A Battery of precipitators |
| 08/13/1991 | US5039426 Process for continuous particle and polymer separation in split-flow thin cells using flow-dependent lift forces |
| 08/13/1991 | US5039407 Water reclamation and collection unit |
| 08/08/1991 | WO1991011392A1 Method of cleaning soil water |
| 08/08/1991 | WO1991011243A1 Device for purifying sewage |
| 08/08/1991 | DE4101076A1 Pre-tipping redn. of liq. in sewage sludge - by applying electro-impulses from discharge condenser |
| 08/07/1991 | EP0439895A1 Homogeneous mixtures of solid organic acids and solid cationic ester-based polymer flocculants |
| 08/07/1991 | EP0439850A1 Separation of particles adsorbed on carrier material |
| 08/07/1991 | EP0439762A1 Process for the preparation of storage stable and free flowing ferrous sulphate |
| 08/07/1991 | EP0439610A1 Gas-containing settling tank |
| 08/06/1991 | US5037927 Modified n-vinylformamide copolymer having reduced viscosity |
| 08/06/1991 | US5037545 Liquid recovery system and method |
| 08/06/1991 | US5036882 Valve assembly for decanter for wastewater treatment facility |
| 08/06/1991 | CA2035510A1 Use of blends of mannich acrylamide polymers and dimethyldiallylammonium halide polymers for flocculating enzme broth streams |
| 08/02/1991 | CA2022716A1 Homogeneous mixtures of solid organic acids and solid cationic ester-based polymer flocculants |
| 08/01/1991 | DE4006689A1 Determining the quality of waste waters - where characteristics of water are continuously measured in non-invasive manner and computer compares measured values with pre-set limits |
| 08/01/1991 | DE4002608A1 Free running ferrous sulphate hepta:hydrate prodn. - by mixing moist and dry salt in required ratio, useful as flocculant and in pigment mfr. |
| 07/31/1991 | CA2035100A1 Process for the production of storable, free-flowing hydrated ferrous sulfate |
| 07/30/1991 | US5035795 Modular clarifier with integral flocculator |
| 07/30/1991 | CA2074840A1 Sewage purification apparatus |
| 07/30/1991 | CA2074829A1 Method for purifying sewage |
| 07/30/1991 | CA1287194C Installation for flocculating coagulable suspensions, in particular for cleaning the backwater from de-inking plants used for waste-paper preparation |
| 07/24/1991 | EP0438264A2 Paint sludge separator system |
| 07/24/1991 | EP0438192A1 Amine polymers as coagulator accelerators in blood phase separation |
| 07/24/1991 | EP0437684A1 Starch separator |
| 07/23/1991 | CA1286480C Method of and apparatus for thickening red muds derived from bauxite and similar slurries |
| 07/17/1991 | EP0437311A1 Solids removal device |
| 07/17/1991 | CN1053088A Process for extracting industrial enzyme by flocculation separation under electric field |
| 07/17/1991 | CA2032816A1 Amine polymers as coagulator accelerators in blood phase separation |
| 07/16/1991 | US5033033 Ultrasonic systems |
| 07/16/1991 | US5032303 Method in the processing of aluminum and the use of certain acids in oils therefor |
| 07/16/1991 | US5032273 Apparatus for separating sand and oil from a waste water stream |
| 07/16/1991 | CA1286448C Flocculating agents based upon copolymers of acrylamide and dimethylaminopropylacrylamide for use in dewatering sludge |
| 07/16/1991 | CA1286278C Automatic flow-control device |
| 07/11/1991 | DE4000307A1 Drive for bridge-mounted scraper and thickener machinery - has framework fixed to central column that can be raised to cater for build-up of sludge on tank floor |
| 07/11/1991 | DE4000305A1 Pivoted ramp - to tip sewage from tank perimeter into surrounding channel while restraining remaining layer |
| 07/11/1991 | DE4000151A1 Mixing solids with gas and liq. into streams - whose frictional interaction separates components |
| 07/11/1991 | DE4000150A1 Sepg. and washing solids in conveyor liq. streams - includes impinging particles obliquely in tapering friction chamber |
| 07/10/1991 | EP0436090A1 Process for the purification of waste water from car washing plants |
| 07/10/1991 | CN1052831A Enclosed purification process by water-washing in production of sulphuric acid |
| 07/10/1991 | CA2025785A1 Organic sludge dehydrater |
| 07/09/1991 | US5030346 Pump for filtration system |
| 07/09/1991 | CA1286039C Process for the improved separation of clarified liquid from biomassin the biological treatment of sewage |
| 07/04/1991 | DE4000037A1 Float with adjustable pneumatic feeder in multilayer liq. - provides data on layer thicknesses |
| 07/04/1991 | DE3943416A1 De-watering very dilute materials e.g. liquid manure etc. - by agglomeration and sedimentation while liq. flows in thin layer over suitable surface and is then filtered using porous rubber membrane |
| 07/03/1991 | EP0434796A1 Device for blasting with a moist granular agent. |
| 07/03/1991 | CN2079923U Air-pot scale filter |
| 07/02/1991 | US5028333 Phase separator module |
| 07/02/1991 | US5028318 Cyclonic system for separating debris particles from fluids |
| 06/27/1991 | WO1991008835A1 A siphon gravity classifier and clarifier |
| 06/26/1991 | EP0434484A1 Device for softening water by decarbonization |
| 06/26/1991 | CN2079526U Sedimentation device with inclined trapezium compartment |
| 06/25/1991 | US5026488 Pumping fluid impurities through filter loop, heating, separating, cooling and analyzing processed fluids; injection of additives; mobile and self-powered in a vehicle |