Patents
Sitemap › C02 - Treatment of water, waste water, sewage, or sludge › C02F - Treatment of water, waste water, sewage, or sludge › C02F 3 - Biological treatment of water, waste water, or sewage
Patents for C02F 3 - Biological treatment of water, waste water, or sewage (46,453)
12/1981
12/22/1981CA1114961A1 Method for maintaining a constant gas to solids ratio in effluent from a long vertical shaft bioreactor
12/22/1981CA1114960A1 Method for the froth flotation separation and treatment of slowly biodegradable components in a waste treatment system
12/22/1981CA1114959A1 Combination of a biological dry toilet and a biological waste water purifying plant
12/22/1981CA1114760A1 Growth of biological material
12/16/1981EP0041565A1 Improved anaerobic and aerobic digestion of waste and biomass by use of lactobacillus culture additives
12/15/1981US4306026 Having intermittent availability of energy supply
12/15/1981US4305894 Axial-flow pump impeller
12/15/1981US4305828 Method of introducing oxygen into water and container for the performance of such method
12/15/1981CA1114528A1 Method and an apparatus for biological treatment of waste waters
12/08/1981US4304740 Liquid aeration apparatus
12/08/1981US4304665 Process for treatment of wastewater
12/02/1981EP0040986A1 A method and apparatus for the treatment of sewage sludge
12/01/1981US4303528 Purification treatment of a liquid waste
12/01/1981US4303527 Measuring organic impurities in storage tank to allow proper flow
12/01/1981US4303516 Orbital wastewater treatment system with integral clarification
12/01/1981US4303350 Septic leaching system
12/01/1981CA1113617A1 Waste water process
12/01/1981CA1113615A1 Process for the enzymatic treatment of waste water of wheat starch plants
11/1981
11/26/1981WO1981003325A1 Method and device for biological processing of waste water
11/24/1981US4302329 Installation for the recovery of methane gas from organic waste
11/24/1981CA1113193A1 Method and a system for treating liquid, in particular waste water
11/17/1981US4301097 Using portable tower
11/17/1981US4301007 Two zone apparatus for biological treatment of waste water
11/04/1981EP0039204A2 Devices for the gasification of liquids and liquid treatment plants including said devices
11/03/1981CA1111779A1 Upflow filter construction and method
10/1981
10/29/1981WO1981003030A1 Improvements relating to installations and methods of preparing combustible gases through fermentation
10/28/1981EP0038759A1 Plant for producing combustible gases by fermentation
10/28/1981EP0038489A2 Method of obtaining animal feed rich in protein
10/27/1981US4297222 Using ultraviolet radiation, and a microorganism growing bed of a non-woven fabric of a synthetic resin
10/27/1981US4297217 Treatment of wastewater
10/27/1981US4297216 By adding an acid, heating, neutralizing and anaerobically digesting
10/27/1981US4297214 Aerator
10/27/1981US4297122 Using a mineral composite to enhance microbial activity
10/21/1981EP0038017A1 Method for aerating waste water in regulation tanks and storage tanks
10/20/1981CA1111158A1 Purification of waste water
10/15/1981WO1981002905A1 Pond with filtered water
10/14/1981EP0037659A1 Method and apparatus for the treatment of wastewater
10/14/1981EP0037537A1 Process for the manufacture of highly specific active char
10/13/1981US4294696 Sewage treatment
10/13/1981US4294694 Anaerobic filter
10/13/1981CA1110787A1 Thickener control system
10/13/1981CA1110786A1 Apparatus for mixing a gas and a liquid
10/13/1981CA1110785A1 Jet aeration channel system
10/07/1981EP0036915A1 Capping device and slurry digester comprising the same
10/06/1981US4293647 Enzyme hydrolysis with protease
10/06/1981US4293506 Sewage treatment, bubbles
10/06/1981US4293426 Coated calcium peroxide particles useful in the treatment of water
10/06/1981US4293421 Method and equipment for a wrap-around upflow submerged anaerobic filter for sewage
10/06/1981US4293412 Anaerobic fermenter-decanter for the purification of residual water from sugar refineries, with recovery of combustible methane
10/06/1981US4293334 Recovery of metals
10/06/1981US4293333 Microbiological recovery of metals
10/06/1981CA1110188A1 Treatment of starch waste materials
10/01/1981WO1981002731A1 Procedure for improving the ecological state of a thermally and/or chemically stratified water basin
10/01/1981WO1981002730A1 Rotating biological confactor
10/01/1981WO1981002661A1 Mariculture filtering system
09/1981
09/30/1981EP0036600A1 Method and device for gasifying liquids
09/30/1981EP0036599A1 Method and apparatus for the absorption of ozone
09/30/1981EP0036598A1 Method and device for gasifying liquids
09/30/1981EP0036581A1 Method of inhibiting deposits and scales deteriorating the functioning of installations for aerating or gasifying water or other liquids
09/29/1981US4292176 Use of activated carbon in waste water treating process
09/29/1981CA1109816A1 Gas-liquid circulating and contacting apparatus
09/23/1981EP0036182A1 Circulation device for treatment basins
09/22/1981US4290979 Waste water treatment
09/22/1981US4290891 Method for growing a deammonifying culture and use thereof in wastewater treatment
09/22/1981US4290885 Aeration device
09/22/1981US4290884 Sludge treatment system
09/21/1981EP0029066A4 On-site wastewater treatment system.
09/17/1981WO1981002570A1 Rotating biological contactor material
09/16/1981EP0035701A2 Aquarium filter
09/16/1981EP0035493A1 Means for advanced water treatment
09/15/1981US4289626 Rotating biological contactor in combination with adsorbent
09/15/1981US4289625 Of plant material or organic waste to produce methane
09/09/1981EP0035264A1 Process and apparatus for treating liquid agricultural waste
09/09/1981EP0035248A1 Process and apparatus for the biological purification of waste water
09/09/1981EP0035243A2 Method and device for flotation
09/09/1981EP0035112A1 Method and apparatus for processing preferably rottable, solid and liquid waste material
09/08/1981US4288545 Pseudomonas aeruginosa, bacillus and other pseudomonas cells
09/08/1981US4288395 Diffusion element with boundary zone treatment
09/08/1981US4288394 Sewage aeration system
09/02/1981EP0034739A2 Method to influence the foaming at chemical or biochemical gas-liquid reactions in gasification reactors, and gasification reactor for carrying out the method
09/02/1981EP0034667A1 Process for the production of gaseous methane
09/01/1981US4287137 Vane-type fluid impeller and method of aerating a liquid
09/01/1981US4287070 Method maintaining a constant gas to solids ratio in effluent from a long vertical shaft bioreactor
09/01/1981US4287069 Process for the improved working up of effluent
09/01/1981US4287062 Apparatus for biological purification of sewage
09/01/1981US4287060 More efficient circulator
09/01/1981CA1108318A1 Process for biological purification of liquid wastes
08/1981
08/28/1981EP0024422A4 Water purification system employing ozone injection.
08/26/1981EP0034147A1 Method for bacteriological treatment of manure and high bod industrial wastes
08/25/1981US4285818 Process of treating wastewater with oxygen
08/25/1981CA1107635A1 Randomly dumpable self orienting spiral packing elements
08/25/1981CA1107561A1 Purification of waste water high in carbohydrates and simultaneous production of high protein feed product
08/25/1981CA1107481A1 Flow distributor for fluid bed biological reactor
08/20/1981WO1981002308A1 A process and an apparatus for converting organic material along a microbiological route
08/18/1981US4284510 Aerobic process, biodegradation
08/18/1981US4284509 Floating, agglomeration, lipids
08/18/1981US4284508 Methane production by attached film
08/18/1981US4284503 Device for aerating sewage or sewage-sludges
08/12/1981EP0033681A1 Apparatus for dispersing a liquid in a gaseous phase
08/12/1981EP0033407A1 A device for creating circulation within a body of liquid, and an apparatus for treating sewage or the like in a body of liquid
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