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)
12/1977
12/13/1977US4062734 Apparatus for desalinating sea water
11/1977
11/29/1977US4060574 Device for lake restoration by oxygen-enriching of the water
11/29/1977US4060486 Waste water aeration device
11/29/1977US4060175 Diaphragm tank cover
11/22/1977US4059524 Water purifying device without movable mechanical part in contact with the liquid to be treated
11/22/1977US4059521 Sewage purification system
11/08/1977US4057401 Methane gas process and apparatus
11/08/1977US4057372 Aerator
11/01/1977US4056465 Production of non-bulking activated sludge
10/1977
10/25/1977US4055490 Activated sludge process
10/18/1977US4054524 Apparatus for purifying waste water containing organic contaminants
10/11/1977US4053396 Control of aerobic biological growth in activated carbon waste water treatment
10/11/1977US4053395 Method for producing methane gas by processing waste materials
10/11/1977US4053394 Process for separating and converting waste into useable products
10/11/1977US4053386 Electrolytic filter for electrolytically filtering and recovering metals from colloidal suspensions
09/1977
09/27/1977US4051204 Apparatus for mixing a liquid phase and a gaseous phase
09/27/1977US4051039 Activated sewage plant and process
09/27/1977US4051035 Apparatus for the aerobic treatment of liquid waste
09/27/1977US4050907 Organic waste treating and conversion system
09/20/1977US4049545 Adding an alkaline coagulant to kill nitrifying bacteria, then an acidifying precipitating agent to cause aggregation of suspended solids
09/13/1977US4048267 Aeration system with foldable low-loss downcomers and method of operation thereof
09/13/1977US4048072 Air diffusers
09/06/1977US4046845 Air diffuser element
09/06/1977US4046693 Scum skimmer apparatus
08/1977
08/30/1977US4045355 Clarification plant
08/30/1977US4045347 System for pollution suppression
08/30/1977US4045344 Apparatus for treating waste water
08/30/1977US4045336 Purification
08/30/1977US4044500 Integrated fermentation-photosynthesis biomass process
08/30/1977US4044406 Compact portable self-contained aerobic digestion toilet
08/23/1977US4044079 Drop line devices
08/23/1977US4043936 Biological denitrification of high concentration nitrate waste
08/23/1977US4043903 Process for promotion of algae growth in a sewage medium
08/23/1977US4043771 Method of and apparatus for the dissolution of gases in liquids
08/16/1977US4042510 Liquid aeration device
08/16/1977US4042497 Septic system with level control
08/16/1977US4042495 Microorganisms which metabolize hydrocarbons
08/16/1977US4042494 Pressure pipe treatment for sewage
08/16/1977US4042493 Phosphate removal from BOD-containing wastewater
08/16/1977US4041981 Ejector assembly
08/09/1977US4040963 Produces methane
08/09/1977US4040953 Anaerobic digestion process
08/02/1977US4039451 Rock and sand layers, septic tank
08/02/1977US4039439 Hydrogen bubbles
08/02/1977US4039438 Biological denitrification of water
08/02/1977US4039437 Treatment of sewage
07/1977
07/19/1977US4036754 Sewage treatment apparatus
07/12/1977US4035301 System for pollution suppression
07/12/1977US4035296 Waste water, gases
07/12/1977US4035290 Oxygen demand
07/12/1977US4035289 Purifying treatment for effluents of mineral oil drillings
07/05/1977US4034030 Oxygenation impregnation apparatus
07/05/1977US4033875 Waste water treatment apparatus
07/05/1977US4033763 Process for recovery of selected metal values from waste waters
07/05/1977US4033704 Destratification device
06/1977
06/28/1977US4032448 Sealed sewage ejector assembly
06/28/1977US4032439 Effluent treatment process
06/28/1977US4032407 Tapered bed bioreactor
06/21/1977US4031006 Vortex coagulation means and method for wastewater clarification
06/21/1977US4030968 Disposal of paper pulp mill sludge
06/21/1977US4030859 Floating aerator having means to vary the length of the draft pipe
06/14/1977US4029581 Aerating system
06/14/1977US4029575 Phosphorus removal from waste water
06/14/1977US4029574 Process and apparatus for the purification of organically contaminated sewage
06/07/1977US4028245 Arrangement for conversion of foreign matter contained in water
06/07/1977US4028244 Apparatus for establishing contact between a liquid and a gas
05/1977
05/31/1977US4026802 Waste water treatment apparatus by biological action
05/31/1977US4026793 Aerobic sewerage digestion process (42 C. process)
05/31/1977US4026527 Vortex generator for controlling the dispersion of effluents in a flowing liquid
05/24/1977US4024618 Method of fabricating gas transmitting body for use in bubble shearing
05/10/1977US4022854 Gas transmitting body for use in bubble shearing
05/10/1977US4022689 Rotating multitube biocontactor for treating sewage
05/10/1977US4022665 Methane
05/03/1977US4021368 Process of treating mycelia of fungi for retention of metals
05/03/1977US4021349 Or aerating a liquidwaste water, centrifugal impeller
05/03/1977US4021348 Gas injection
05/03/1977US4021347 Sewage treatment system
05/03/1977US4021338 Hydrogen peroxide
04/1977
04/19/1977US4018859 Arrangement for aerating of liquids
04/19/1977US4018593 Process for recovering useful substances from culture media
04/12/1977US4017388 Phosphate precipitation with lime, sewage treatment
03/1977
03/29/1977US4014767 Self-contained waste disposal system including self-cleaning filter
03/29/1977US4014526 Liquid moving and mixing apparatus
03/22/1977US4013585 Nitrohumic acid-containing adsorbents and process for producing same
03/22/1977US4013559 Prefabricated panels for sub-surface sewage effluent and waste water disposal
03/22/1977US4013552 Ultrasonics
03/15/1977US4012470 Sewage treatment aeration systems
03/08/1977US4011163 Water waste treatment
03/08/1977US4011162 Pivotable fluid diverter for recirculation system
03/08/1977US4011156 Method for eliminating organic and inorganic bound nitrogen from domestic and industrial waste water
03/01/1977US4010102 Liquid treatment apparatus having parallel rotating baffles
02/1977
02/22/1977US4009106 Sewage treatment
02/22/1977US4009105 Waste treatment apparatus
02/22/1977US4009100 Activated sludge system
02/22/1977US4009099 Apparatus and process for removing ammonia nitrogen from waste water
02/22/1977US4009098 Biochemical oxygen demand from water
02/22/1977US4008689 Waste collection and conversion system
02/15/1977US4008159 Renovation of waste water
02/15/1977US4008155 Apparatus for disposal of effluents
02/15/1977US4007920 Mixing and aerating device
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