Patents
Sitemap › C02 - Treatment of water, waste water, sewage, or sludge › C02F - Treatment of water, waste water, sewage, or sludge › C02F 1 - Treatment of water, waste water, or sewage
Patents for C02F 1 - Treatment of water, waste water, or sewage (145,124)
11/1981
11/04/1981EP0039197A1 Distillation apparatus
11/04/1981EP0039151A1 Water producing apparatus
11/04/1981EP0039130A1 Aromatic compounds as oxygen scavengers in an aqueous medium
11/04/1981EP0039033A1 Process for preparing omega-amino-1-hydroxyalkylidene-1, 1-bis phosphonic acids
11/04/1981EP0038823A1 Apparatus for magnetic treatment of a flowing liquid.
11/03/1981US4298696 Minimization of cross-contamination of anionic and cationic materials
11/03/1981US4298475 Water purification system
11/03/1981US4298467 Water treatment system
11/03/1981US4298160 Solid bowl decanter centrifuges
11/03/1981US4298025 Control valve for water softeners
11/03/1981CA1111799A1 Electrolytic removal of pollutants from aqueous fluid by conductive particulate bed
11/03/1981CA1111782A1 Apparatus and method for the gravity settling of suspended solids
10/1981
10/29/1981WO1981003034A1 Matched stage odor control system
10/28/1981EP0038573A1 Polymers of alpha-beta-unsaturated N-substituted carboxylic-acid amides and their use as sedimentation, flocculation, dewatering and retention auxiliary agents
10/28/1981EP0038402A1 Process for the preparation of catalysts for the oxidation of organic substances with ozone
10/27/1981US4297333 Method of decomposing hypochlorite ion in a basic solution
10/27/1981US4297224 Using 1-bromo-3-chloro-5,5-dimethylhydantoin
10/27/1981US4297223 Dividing the water flow to a chlorinator and mixing tank and then combining; sterilization water supply systems
10/27/1981US4297222 Using ultraviolet radiation, and a microorganism growing bed of a non-woven fabric of a synthetic resin
10/27/1981US4297218 Process and apparatus for extracting a substance from a body of water
10/27/1981US4297216 By adding an acid, heating, neutralizing and anaerobically digesting
10/27/1981CA1111595A1 Cross-linked, water-swellable polymer microgels
10/27/1981CA1111254A1 Inline dispersal valve
10/21/1981EP0038106A1 Process for reclaiming chromium from roasted chromium ash containing hexavalent chromium
10/21/1981EP0038105A2 Process for improving the conversion of trivalent chromium in ash to hexavalent chromium
10/21/1981EP0038089A1 Apparatus for removing a pollutant from the surface of a water body
10/20/1981US4296328 Apparatus for producing high purity water
10/20/1981US4296066 Ultraviolet radiation purification
10/20/1981US4295975 Stators
10/20/1981US4295973 Process for separating solids from suspensions of influent
10/20/1981US4295971 Water treatment, flocculation stabilization with a magnetic colloid
10/20/1981US4295950 Micro-porous cathode filled with sodium amalgam
10/20/1981US4295946 Method and apparatus for electrochemical purification of contaminated liquids
10/20/1981US4295932 Synergistic blend of biocides
10/20/1981CA1111157A1 Treatment of arsenical effluents
10/20/1981CA1111156A1 Process for the treatment of alkaline liquors containing sulfate ions
10/20/1981CA1110999A1 Water treating apparatus and methods
10/20/1981CA1110950A1 Destabilization of sludge with hydrolyzed starch flocculants
10/20/1981CA1110949A1 Process for dewatering mineral concentrates
10/15/1981WO1981002887A1 Method for preparing catalysts used in the oxidation reaction of organic substances by means of ozone
10/15/1981WO1981002886A1 Wastewater treatment process
10/15/1981WO1981002846A1 Electromagnetic fluid conditioner
10/14/1981EP0037655A2 A phenolic chelate resin, a process for producing the same, and a method of recovering a heavy metal ion with the same
10/14/1981EP0037590A2 Polymers of acrylyl or methacrylyl ureas containing quaternary groups, and their use as flocculation, sedimentation, dewatering and retention auxiliary agents
10/14/1981EP0037537A1 Process for the manufacture of highly specific active char
10/14/1981EP0037520A2 Use of phenol-aldehyde resins for the removal of substances from liquids, especially of urinous substances
10/13/1981US4294812 Recovery of ammonia from aqueous streams
10/13/1981US4294706 Process for treating waste water
10/13/1981US4294705 Method and an agent for chemical purification of water by means of chemical precipitation and magnetic sludge separation
10/13/1981US4294703 Hydrogen peroxide treatment of effluent
10/13/1981US4294698 Water treatment
10/13/1981US4294697 Apparatus for treatment of sewage
10/13/1981US4294434 Heavy metal removal apparatus
10/13/1981CA1110787A1 Thickener control system
10/07/1981EP0037325A1 Electrolytic process using a porous electrode and its application to the recovery of metals from aqueous solutions
10/07/1981EP0037321A1 Process for making adsorbent materials for analyzing or treating liquids and materials so obtained
10/06/1981US4293559 Slime control compositions and methods of using the same
10/06/1981US4293527 Metals extraction from sea water
10/06/1981US4293426 Coated calcium peroxide particles useful in the treatment of water
10/06/1981US4293425 Method of chlorinating swimming pools and the like
10/06/1981US4293416 Which includes a clarifier with a special arrangement of baffles to enhance flocculation and precipitation
10/06/1981US4293400 Using apparatus which includes a precipitator
10/06/1981US4293348 Method for removing oil-based materials from water surface
10/06/1981US4293333 Microbiological recovery of metals
10/01/1981WO1981002807A1 Silica removal process and alumina composition used therein
10/01/1981WO1981002731A1 Procedure for improving the ecological state of a thermally and/or chemically stratified water basin
10/01/1981WO1981002729A1 Arrangement for passing a first liquid close to,but without mixing it with a second liquid,for example an arrangement for sea water desalination
09/1981
09/30/1981EP0036640A1 Metal recovering cell for the purification of industrial process solutions and waste water
09/30/1981EP0036599A1 Method and apparatus for the absorption of ozone
09/29/1981US4292408 Mass and a method of preparing same of living cells of organisms for adsorbing metal ions from a physiological solution, and employment of the mass for enriching metals
09/29/1981US4292293 Method for the oxidation of water-soluble sulfide compounds to higher oxidation states
09/29/1981US4292176 Use of activated carbon in waste water treating process
09/29/1981US4292175 Compact electrocatalytic sewage treatment unit for maritime use
09/29/1981US4292163 Flocculation
09/29/1981US4292160 An anode comprising a packed bed of lead shot where lead chromate is formed, drops off, and settles into a trap
09/29/1981US4292136 Device for desalting sea or brackish water by using solar energy
09/29/1981US4292135 Multistage-expansion evaporator
09/29/1981US4292121 Solid/liquid separation through liquid vaporization and condensation, and apparatus therefor
09/29/1981US4292043 Process for working up effluent containing ammonium sulphate
09/29/1981US4291549 Method of dispersing a liquid into another liquid
09/29/1981CA1109806A1 Apparatus for removing oil from the surface of a body of water
09/29/1981CA1109764A1 Dewatering ore concentrates
09/29/1981CA1109606A1 Method of absorption of hydro-carbons or organic solvents
09/23/1981EP0036055A2 Method for the protection of aqueous media against attack by micro-organisms
09/22/1981US4291125 Method for electronic control of infections using silver ions
09/22/1981US4290987 Plasmaphoresis
09/22/1981US4290898 Pollution control
09/22/1981US4290897 Dewatering fine coal slurries using two types of organopolysiloxanes
09/22/1981US4290896 Dewatering fine coal slurries using organopolysiloxanes
09/22/1981US4290895 Method for eliminating ammonia nitrogen from sewage
09/22/1981US4290886 Benefication, coal dressing, wet refining
09/22/1981US4290873 Chlorine gas generator apparatus
09/22/1981US4290846 Applying 3,5-dibromo-4-chlorophenol, 3,5-dichloro-4-bromophenol
09/22/1981US4290451 Water conditioning system controls
09/22/1981CA1109408A1 Destabilization and improvement in permeability and shear strength of sludge treated with hydrolyzed starch flocculant and portland cement
09/22/1981CA1109231A1 Method of stripping ammonia from ammoniacal solutions
09/17/1981WO1981002618A1 Method and installation for regeneration oil polluted condensed water and for recuperating the residual heat of said condensed water
09/17/1981WO1981002569A1 A method of purifying waste aqueous solutions from heavy metals
09/17/1981WO1981002529A1 Magnetic water conditioner apparatus
09/16/1981EP0035650A2 Continuous-evaporation plant for contaminated liquids
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