| IPC 6 English version | C02-C02F01120 |
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SECTION C | – CHEMISTRY; METALLURGY |
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TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (settling tanks, filtering, e.g. sand filters or screening devices, B 01 D) |
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TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B 01 D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B 63 J; adding materials to water to prevent corrosion C 23 F; treating radioactively-contaminated liquids G 21 F 9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes) |
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Note |
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Processes using enzymes or micro-organisms classified in this subclass are not further classified in subclass C 12 S. [5] |
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1/ | 00 | Treatment of water, waste water, or sewage (C 02 F 3/00 to C 02 F 9/00 take precedence) |
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1/ | 02 | . | by heating (methods of steam generation F 22 B; preheating boiler feed-water or accumulating preheated boiler feed-water F 22 D) [3] |
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1/ | 04 | . . | by distillation or evaporation [3] |
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1/ | 06 | . . . | Flash evaporation [3] |
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1/ | 08 | . . . | Thin film evaporation [3] |
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1/ | 10 | . . . | by direct contact with a particulate solid or with a fluid, as a heat transfer medium [3] |
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1/ | 12 | . . . . | Spray evaporation [3] |
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1/ | 14 | . . . | using solar energy [3] |
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1/ | 16 | . . . | using waste heat from other processes [3] |
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1/ | 18 | . . . | Transportable devices to obtain potable water [3] |
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1/ | 20 | . | by degassing, i.e. liberation of dissolved gases (degasification of liquids in general B 01 D 19/00; arrangement of degassing apparatus in boiler feed supply F 22 D) [3] |
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1/ | 22 | . | by freezing [3] |
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1/ | 24 | . | by flotation (C 02 F 1/465 takes precedence) [3,5] |
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1/ | 26 | . | by extraction [3] |
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1/ | 28 | . | by sorption (using ion-exchange C 02 F 1/42; sorbent compositions B 01 J) [3] |
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1/ | 30 | . | by irradiation [3] |
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1/ | 32 | . . | with ultra-violet light [3] |
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1/ | 34 | . | with mechanical oscillations [3] |
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1/ | 36 | . . | ultrasonic vibrations [3] |
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1/ | 38 | . | by centrifugal separation [3] |
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1/ | 40 | . | Devices for separating or removing fatty or oily substances or similar floating material (cleaning or keeping clear the surface of open water from oil or like materials E 02 B 15/04; devices in sewers for separating liquid or solid substances from sewage E 03 F 5/14, e.g. for use in drains leading to the sewer E 03 F 5/16) [3,5] |
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1/ | 42 | . | by ion-exchange (ion-exchange in general B 01 J) [3] |
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1/ | 44 | . | by dialysis, osmosis or reverse osmosis [3] |
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1/ | 46 | . | by electrochemical methods [3,5] |
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1/ | 461 | . . | by electrolysis [5] |
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1/ | 463 | . . . | by electrocoagulation [5] |
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1/ | 465 | . . . | by electroflotation [5] |
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1/ | 467 | . . . | by electrochemical disinfection [5] |
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1/ | 469 | . . | by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis [5] |
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1/ | 48 | . | with magnetic or electric fields (C 02 F 1/46 takes precedence) [3] |
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1/ | 50 | . | by addition or application of a germicide or by oligodynamic treatment (C 02 F 1/467 takes precedence) [3,5] |
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1/ | 52 | . | by flocculation or precipitation of suspended impurities [3] |
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1/ | 54 | . . | using organic material [3] |
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1/ | 56 | . . . | Macromolecular compounds [3] |
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1/ | 58 | . | by removing specified dissolved compounds (using ion-exchange C 02 F 1/42; softening water C 02 F 5/00) [3] |
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1/ | 60 | . . | Silicon compounds [3] |
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1/ | 62 | . . | Heavy metal compounds [3] |
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1/ | 64 | . . . | of iron or manganese [3] |
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1/ | 66 | . | by neutralisation; pH adjustment (for degassing C 02 F 1/20; using ion-exchange C 02 F 1/42; for flocculation or precipitation of suspended impurities C 02 F 1/52; for removing dissolved compounds C 02 F 1/58) [3] |
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1/ | 68 | . | by addition of specified substances, e.g. trace elements, for ameliorating potable water (medicinal water A 61 K) [3] |
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1/ | 70 | . | by reduction [3] |
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1/ | 72 | . | by oxidation [3] |
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1/ | 74 | . . | with air (aeration of stretches of water C 02 F 7/00) [3] |
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1/ | 76 | . . | with halogens or compounds of halogens [3] |
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1/ | 78 | . . | with ozone [3] |
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3/ | 00 | Biological treatment of water, waste water, or sewage [3] |
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3/ | 02 | . | Aerobic processes [3] |
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3/ | 04 | . . | using trickle filters [3] |
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3/ | 06 | . . | using submerged filters [3] |
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3/ | 08 | . . | using moving contact bodies [3] |
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3/ | 10 | . . | Packings; Fillings; Grids (packing elements in general B 01 J 19/30, B 01 J 19/32) [3] |
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3/ | 12 | . . | Activated sludge processes [3] |
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3/ | 14 | . . . | using surface aeration [3] |
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3/ | 16 | . . . . | the aerator having a vertical axis [3] |
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3/ | 18 | . . . . | the aerator having a horizontal axis [3] |
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3/ | 20 | . . . | using diffusers [3] |
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3/ | 22 | . . . | using circulation pipes [3] |
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3/ | 24 | . . . | using free-fall aeration or spraying [3] |
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3/ | 26 | . . . | using pure oxygen or oxygen-rich gas [3] |
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3/ | 28 | . | Anaerobic digestion processes [3] |
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3/ | 30 | . | Aerobic and anaerobic processes [3] |
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3/ | 32 | . | characterised by the animals or plants used, e.g. algae [3] |
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3/ | 34 | . | characterised by the micro-organisms used [3] |
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5/ | 00 | Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents (softening using ion-exchange C 02 F 1/42) |
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5/ | 02 | . | Softening water by precipitation of the hardness [3] |
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5/ | 04 | . . | using phosphates (C 02 F 5/06 takes precedence) [3] |
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5/ | 06 | . . | using calcium compounds [3] |
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5/ | 08 | . | Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents [3] |
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5/ | 10 | . . | using organic substances [3] |
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5/ | 12 | . . . | containing nitrogen (C 02 F 5/14 takes precedence) [3] |
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5/ | 14 | . . . | containing phosphorus [3] |
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7/ | 00 | Aeration of stretches of water [3] |
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9/ | 00 | Multistage treatment of water, waste water or sewage [3] |
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Notes |
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(1) | This group covers only those combined treating operations where the interest is directed to the relationship between the steps. [3] |
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(2) | This group does not cover, for example, chemical treatment followed by settlement or biological treatment involving normal mechanical treatment. [3] |
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11/ | 00 | Treatment of sludge; Devices therefor [3] |
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11/ | 02 | . | Biological treatment [3] |
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11/ | 04 | . . | Anaerobic treatment; Production of methane by such processes [3] |
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11/ | 06 | . | by oxidation (incinerators or other apparatus for burning waste liquors, e.g. sulfite liquor from paper-making plant, F 23 G 7/04) [3] |
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11/ | 08 | . . | Wet air oxidation [3] |
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11/ | 10 | . | by pyrolysis [3] |
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11/ | 12 | . | by de-watering, drying, or thickening [3] |
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11/ | 14 | . . | with addition of chemical agents [3] |
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11/ | 16 | . . | using drying or composting beds [3] |
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11/ | 18 | . | by thermal conditioning (by pyrolysis C 02 F 11/10) [3] |
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11/ | 20 | . . | by freezing [3] |
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