1. CPC Sections
  2. CPC Section C
  3. CPC Class C02
  4. CPC Subclass C02F
Printable version [PDF]
Version: 2024.08
Loading Scheme...
CPC
COOPERATIVE PATENT CLASSIFICATION
​​
C02F
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F 9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes) [2023-01]
NOTE

  • When classifying in this subclass, classification is also made in group B01D 15/08 insofar as subject matter of general interest relating to chromatography is concerned.
WARNING

  • {In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.}
C02F 1/00
Treatment of water, waste water, or sewage (C02F 3/00 - C02F 9/00 take precedence) [2016-05]
C02F 1/001
.
{Processes for the treatment of water whereby the filtration technique is of importance (C02F 1/44 takes precedence; construction of filters in general B01D 24/00 - B01D 41/00)} [2016-05]
C02F 1/002
. .
{using small portable filters for producing potable water, e.g. personal travel or emergency equipment, survival kits, combat gear (C02F 1/003 takes precedence)} [2013-01]
C02F 1/003
. .
{using household-type filters for producing potable water, e.g. pitchers, bottles, faucet mounted devices (C02F 9/20 takes precedence)} [2023-01]
C02F 1/004
. .
{using large scale industrial sized filters} [2013-01]
C02F 1/005
.
{Systems or processes based on supernatural or anthroposophic principles, cosmic or terrestrial radiation, geomancy or rhabdomancy} [2013-01]
C02F 1/006
.
{Water distributors either inside a treatment tank or directing the water to several treatment tanks; Water treatment plants incorporating these distributors, with or without chemical or biological tanks (for settling tanks B01D 21/24)} [2013-01]
C02F 2001/007
.
{Processes including a sedimentation step} [2013-01]
C02F 1/008
.
{Control or steering systems not provided for elsewhere in subclass C02F} [2013-01]
C02F 1/02
.
by heating (methods of steam generation F22B; preheating boiler feed-water or accumulating preheated boiler feed-water F22D) [2013-01]
C02F 1/025
. .
{Thermal hydrolysis} [2013-01]
C02F 1/04
. .
by distillation or evaporation [2013-01]
C02F 1/041
. . .
{by means of vapour compression} [2013-01]
C02F 1/042
. . .
{Prevention of deposits} [2013-01]
C02F 1/043
. . .
{Details} [2013-01]
C02F 1/045
. . .
{for obtaining ultra-pure water} [2013-01]
C02F 1/046
. . .
{under vacuum produced by a barometric column} [2013-01]
C02F 1/047
. . .
{using eolic energy} [2013-01]
C02F 1/048
. . .
{Purification of waste water by evaporation} [2013-01]
C02F 1/06
. . .
Flash evaporation [2013-01]
C02F 1/08
. . .
Thin film evaporation [2013-01]
C02F 1/10
. . .
by direct contact with a particulate solid or with a fluid, as a heat transfer medium [2013-01]
C02F 1/12
. . . .
Spray evaporation [2013-01]
C02F 1/14
. . .
using solar energy [2013-01]
C02F 1/16
. . .
using waste heat from other processes [2013-01]
C02F 1/18
. . .
Transportable devices to obtain potable water [2013-01]
C02F 1/20
.
by degassing, i.e. liberation of dissolved gases (degasification of liquids in general B01D 19/00; arrangement of degassing apparatus in boiler feed supply F22D) [2013-01]
C02F 1/22
.
by freezing [2013-01]
C02F 1/24
.
by flotation (C02F 1/465 takes precedence) [2013-01]
C02F 1/26
.
by extraction [2013-01]
C02F 1/265
. .
{Desalination} [2013-01]
C02F 1/28
.
by sorption (using ion-exchange C02F 1/42; sorbent compositions B01J) [2013-01]
C02F 1/281
. .
{using inorganic sorbents} [2013-01]
C02F 1/283
. .
{using coal, charred products, or inorganic mixtures containing them} [2013-01]
C02F 1/285
. .
{using synthetic organic sorbents} [2013-01]
C02F 1/286
. .
{using natural organic sorbents or derivatives thereof} [2013-01]
C02F 1/288
. .
{using composite sorbents, e.g. coated, impregnated, multi-layered} [2013-01]
C02F 1/30
.
by irradiation [2013-01]
C02F 1/302
. .
{with microwaves} [2013-01]
C02F 1/305
. .
{with electrons} [2013-01]
C02F 1/307
. .
{with X-rays or gamma radiation} [2015-07]
C02F 1/32
. .
with ultraviolet light [2023-08]
C02F 1/325
. . .
{Irradiation devices or lamp constructions} [2013-01]
C02F 1/34
.
with mechanical oscillations [2013-01]
C02F 1/36
. .
ultrasonic vibrations [2013-01]
C02F 1/38
.
by centrifugal separation [2013-01]
C02F 1/385
. .
{by centrifuging suspensions (centrifuges B04B)} [2013-01]
C02F 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 E02B 15/04; devices in sewers for separating liquid or solid substances from sewage E03F 5/14, e.g. for use in drains leading to the sewer E03F 5/16) [2013-01]
​
C02F 1/42
.
by ion-exchange (ion-exchange in general B01J) [2016-05]
NOTE

C02F 2001/422
. .
{using anionic exchangers} [2013-01]
C02F 2001/425
. .
{using cation exchangers} [2013-01]
C02F 2001/427
. .
{using mixed beds} [2013-01]
C02F 1/44
.
by dialysis, osmosis or reverse osmosis {(general membrane separation processes B01D 61/00, membrane modules B01D 63/00, electrodialysis C02F 1/4693, combination of membrane modules and bioreactors C02F 3/1268)} [2013-01]
C02F 1/441
. .
{by reverse osmosis} [2013-01]
C02F 1/442
. .
{by nanofiltration} [2013-01]
C02F 1/444
. .
{by ultrafiltration or microfiltration} [2013-01]
C02F 1/445
. .
{by forward osmosis} [2013-01]
C02F 1/447
. .
{by membrane distillation (distillation and evaporation without the use of membranes C02F 1/04)} [2013-01]
C02F 1/448
. .
{by pervaporation} [2013-01]
C02F 1/46
.
by electrochemical methods [2013-01]
C02F 1/4602
. .
{for prevention or elimination of deposits} [2013-01]
C02F 1/4604
. .
{for desalination of seawater or brackish water} [2013-01]
C02F 1/4606
. .
{for producing oligodynamic substances to disinfect the water} [2017-02]
C02F 1/4608
. .
{using electrical discharges} [2013-01]
C02F 1/461
. .
by electrolysis [2013-01]
C02F 1/46104
. . .
{Devices therefor; Their operating or servicing} [2013-01]
​
C02F 1/46109
. . . .
{Electrodes} [2016-08]
NOTE

C02F 1/46114
. . . . .
{Electrodes in particulate form or with conductive and/or non conductive particles between them} [2017-02]
C02F 2001/46119
. . . . .
{Cleaning the electrodes} [2013-01]
C02F 2001/46123
. . . . .
{Movable electrodes} [2013-01]
C02F 2001/46128
. . . . .
{Bipolar electrodes} [2013-01]
C02F 2001/46133
. . . . .
{characterised by the material} [2013-01]
C02F 2001/46138
. . . . . .
{Electrodes comprising a substrate and a coating} [2013-01]
C02F 2001/46142
. . . . . . .
{Catalytic coating} [2013-01]
C02F 2001/46147
. . . . . . .
{Diamond coating} [2013-01]
C02F 2001/46152
. . . . .
{characterised by the shape or form} [2024-08]
C02F 2001/46157
. . . . . .
{Perforated or foraminous electrodes} [2013-01]
C02F 2001/46161
. . . . . . .
{Porous electrodes} [2013-01]
C02F 2001/46166
. . . . . . . .
{Gas diffusion electrodes} [2013-01]
C02F 2001/46171
. . . . . .
{Cylindrical or tubular shaped} [2013-01]
C02F 1/46176
. . . .
{Galvanic cells} [2013-01]
​
C02F 1/4618
. . . .
{for producing "ionised" acidic or basic water} [2016-05]
NOTE

  • When classifying in group C02F 1/4618, details relating to the production of "ionised" acidic or basic water using electrolysis devices can be further indexed by using indexing codes chosen from C02F 2001/46185 - C02F 2001/46195
C02F 2001/46185
. . . . .
{only anodic or acidic water, e.g. for oxidizing or sterilizing} [2013-01]
C02F 2001/4619
. . . . .
{only cathodic or alkaline water, e.g. for reducing} [2013-01]
C02F 2001/46195
. . . . .
{characterised by the oxidation reduction potential [ORP]} [2013-01]
C02F 1/463
. . .
by electrocoagulation [2013-01]
C02F 1/465
. . .
by electroflotation [2013-01]
C02F 1/467
. . .
by electrochemical disinfection; {by electrooxydation or by electroreduction} [2017-02]
C02F 1/4672
. . . .
{by electrooxydation} [2013-01]
C02F 1/4674
. . . . .
{with halogen or compound of halogens, e.g. chlorine, bromine} [2013-01]
C02F 1/4676
. . . .
{by electroreduction} [2013-01]
C02F 1/4678
. . . . .
{of metals} [2013-01]
C02F 1/469
. .
by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis [2013-01]
C02F 1/4691
. . .
{Capacitive deionisation} [2013-01]
C02F 1/4693
. . .
{electrodialysis} [2013-01]
C02F 1/4695
. . . .
{electrodeionisation} [2013-01]
C02F 1/4696
. . .
{electrophoresis} [2013-01]
C02F 1/4698
. . .
{electro-osmosis} [2013-01]
C02F 1/48
.
with magnetic or electric fields (C02F 1/46 takes precedence) [2013-01]
C02F 1/481
. .
{using permanent magnets} [2013-01]
C02F 1/482
. . .
{located on the outer wall of the treatment device, i.e. not in contact with the liquid to be treated, e.g. detachable} [2013-01]
C02F 1/484
. .
{using electromagnets} [2015-07]
C02F 1/485
. . .
{located on the outer wall of the treatment device, i.e. not in contact with the liquid to be treated, e.g. detachable} [2015-07]
C02F 1/487
. .
{using high frequency electromagnetic fields, e.g. pulsed electromagnetic fields} [2015-07]
C02F 1/488
. .
{for separation of magnetic materials, e.g. magnetic flocculation} [2013-01]
C02F 1/50
.
by addition or application of a germicide or by oligodynamic treatment {(C02F 1/4606, C02F 1/467, C02F 1/76 take precedence)} [2013-01]
C02F 1/505
. .
{by oligodynamic treatment} [2013-01]
C02F 1/52
.
by flocculation or precipitation of suspended impurities {(C02F 1/463 takes precedence)} [2013-01]
C02F 1/5209
. .
{Regulation methods for flocculation or precipitation} [2013-01]
C02F 2001/5218
. .
{Crystallization} [2013-01]
C02F 1/5227
. .
{Processes for facilitating the dissolution of solid flocculants in water} [2013-01]
C02F 1/5236
. .
{using inorganic agents} [2013-01]
C02F 1/5245
. . .
{using basic salts, e.g. of aluminium and iron} [2013-01]
C02F 1/5254
. . .
{using magnesium compounds and phosphoric acid for removing ammonia} [2013-01]
C02F 1/5263
. .
{using natural chemical compounds} [2013-01]
C02F 1/5272
. .
{using specific organic precipitants} [2013-01]
C02F 1/5281
. .
{Installations for water purification using chemical agents} [2013-01]
C02F 1/529
. .
{Processes or devices for preparing lime water} [2013-01]
C02F 1/54
. .
using organic material [2013-01]
C02F 1/542
. . .
{Phosphorus compounds} [2013-01]
C02F 1/545
. . .
{Silicon compounds} [2013-01]
C02F 1/547
. . .
{Tensides} [2013-01]
C02F 1/56
. . .
Macromolecular compounds [2013-01]
C02F 1/58
.
by removing specified dissolved compounds (using ion-exchange C02F 1/42; softening water C02F 5/00) [2013-01]
C02F 1/583
. .
{by removing fluoride or fluorine compounds} [2013-01]
C02F 1/586
. .
{by removing ammoniacal nitrogen (for biological methods C02F 3/00)} [2013-01]
C02F 1/60
. .
Silicon compounds {(C02F 1/583 takes precedence)} [2013-01]
C02F 1/62
. .
Heavy metal compounds [2013-01]
C02F 1/64
. . .
of iron or manganese [2013-01]
C02F 1/645
. . . .
{Devices for iron precipitation and treatment by air} [2013-01]
C02F 1/66
.
by neutralisation; pH adjustment (for degassing C02F 1/20; using ion-exchange C02F 1/42; for flocculation or precipitation of suspended impurities C02F 1/52; for removing dissolved compounds C02F 1/58) [2013-01]
C02F 1/68
.
by addition of specified substances, e.g. trace elements, for ameliorating potable water (medicinal water A61K) [2013-01]
C02F 1/681
. .
{by addition of solid materials for removing an oily layer on water} [2013-01]
C02F 1/682
. .
{by addition of chemical compounds for dispersing an oily layer on water} [2013-01]
C02F 1/683
. .
{by addition of complex-forming compounds} [2013-01]
C02F 1/685
. .
{Devices for dosing the additives} [2013-01]
C02F 1/686
. . .
{Devices for dosing liquid additives} [2013-01]
C02F 1/687
. . .
{Devices for dosing solid compounds} [2013-01]
C02F 1/688
. . .
{Devices in which the water progressively dissolves a solid compound} [2013-01]
C02F 1/70
.
by reduction {(C02F 1/4676 takes precedence)} [2013-01]
C02F 1/705
. .
{Reduction by metals} [2013-01]
C02F 1/72
.
by oxidation {(C02F 1/4672 takes precedence)} [2013-01]
C02F 1/722
. .
{Oxidation by peroxides} [2013-01]
C02F 1/725
. .
{by catalytic oxidation} [2013-01]
C02F 1/727
. .
{using pure oxygen or oxygen rich gas} [2013-01]
C02F 1/74
. .
with air (aeration of stretches of water C02F 7/00) [2013-01]
C02F 1/76
. .
with halogens or compounds of halogens {(C02F 1/4674 takes precedence)} [2013-01]
C02F 1/763
. . .
{Devices for the addition of such compounds in gaseous form} [2013-01]
C02F 1/766
. . .
{by means of halogens other than chlorine or of halogenated compounds containing halogen other than chlorine} [2013-01]
C02F 1/78
. .
with ozone {(C02F 1/4672 takes precedence)} [2013-01]
C02F 3/00
Biological treatment of water, waste water, or sewage {(C02F 1/006 takes precedence)} [2013-01]
C02F 2003/001
.
{using granular carriers or supports for the microorganisms} [2013-01]
C02F 2003/003
. .
{using activated carbon or the like} [2013-01]
C02F 3/005
.
{Combined electrochemical biological processes (aeration by electrolytically produced oxygen bubbles C02F 3/202)} [2013-01]
C02F 3/006
.
{Regulation methods for biological treatment} [2013-01]
C02F 2003/008
.
{using anaerobic baffled reactors} [2013-01]
C02F 3/02
.
Aerobic processes [2013-01]
C02F 3/025
. .
{Biological purification using sources of oxygen other than air, oxygen or ozone} [2013-01]
C02F 3/04
. .
using trickle filters [2013-01]
C02F 3/043
. . .
{Devices for distributing water over trickle filters} [2013-01]
C02F 3/046
. . .
{Soil filtration} [2013-01]
C02F 3/06
. .
using submerged filters [2013-01]
C02F 3/08
. .
using moving contact bodies [2013-01]
C02F 3/082
. . .
{Rotating biological contactors} [2013-01]
C02F 3/085
. . .
{Fluidized beds} [2013-01]
C02F 3/087
. . . .
{Floating beds with contact bodies having a lower density than water} [2013-01]
C02F 3/10
. .
Packings; Fillings; Grids (packing elements in general B01J 19/30, B01J 19/32) [2013-01]
C02F 3/101
. . .
{Arranged-type packing, e.g. stacks, arrays} [2013-01]
C02F 3/102
. . .
{Permeable membranes} [2013-01]
C02F 3/103
. . .
{Textile-type packing} [2013-01]
C02F 3/104
. . .
{Granular carriers} [2013-01]
C02F 3/105
. . .
{Characterized by the chemical composition} [2013-01]
C02F 3/106
. . . .
{Carbonaceous materials} [2013-01]
C02F 3/107
. . . .
{Inorganic materials, e.g. sand, silicates} [2013-01]
C02F 3/108
. . . .
{Immobilising gels, polymers or the like} [2013-01]
C02F 3/109
. . .
{Characterized by the shape (C02F 3/104 takes precedence)} [2013-01]
C02F 3/12
. .
Activated sludge processes [2013-01]
C02F 3/1205
. . .
{Particular type of activated sludge processes} [2013-01]
C02F 3/121
. . . .
{Multistep treatment} [2013-01]
C02F 3/1215
. . . .
{Combinations of activated sludge treatment with precipitation, flocculation, coagulation and separation of phosphates} [2013-01]
C02F 3/1221
. . . .
{comprising treatment of the recirculated sludge} [2013-01]
C02F 3/1226
. . . .
{comprising an absorbent material suspended in the mixed liquor} [2013-01]
C02F 3/1231
. . . .
{Treatments of toxic sewage} [2013-01]
C02F 3/1236
. . .
{Particular type of activated sludge installations} [2013-01]
C02F 3/1242
. . . .
{Small compact installations for use in homes, apartment blocks, hotels or the like} [2013-01]
C02F 3/1247
. . . . .
{comprising circular tanks with elements, e.g. decanters, aeration basins, in the form of segments, crowns or sectors} [2013-01]
C02F 3/1252
. . . .
{Cylindrical tanks with horizontal axis} [2013-01]
C02F 3/1257
. . . .
{Oxidation ditches} [2013-01]
C02F 3/1263
. . . .
{Sequencing batch reactors [SBR]} [2013-01]
C02F 3/1268
. . . .
{Membrane bioreactor systems} [2013-01]
C02F 3/1273
. . . . .
{Submerged membrane bioreactors} [2013-01]
C02F 3/1278
. . .
{Provisions for mixing or aeration of the mixed liquor} [2013-01]
C02F 3/1284
. . . .
{Mixing devices} [2013-01]
C02F 3/1289
. . . .
{Aeration by saturation under super-atmospheric pressure} [2013-01]
C02F 3/1294
. . . .
{"Venturi" aeration means} [2013-01]
C02F 3/14
. . .
using surface aeration [2013-01]
C02F 3/145
. . . .
{Protection against aerosols} [2013-01]
C02F 3/16
. . . .
the aerator having a vertical axis [2013-01]
C02F 3/165
. . . . .
{using vertical aeration channels} [2013-01]
C02F 3/18
. . . .
the aerator having a horizontal axis [2013-01]
C02F 3/20
. . .
using diffusers [2013-01]
C02F 3/201
. . . .
{Perforated, resilient plastic diffusers, e.g. membranes, sheets, foils, tubes, hoses} [2013-01]
C02F 3/202
. . . .
{Aeration by electrolytically produced oxygen bubbles} [2013-01]
C02F 3/203
. . . .
{Swing diffusers} [2013-01]
C02F 3/205
. . . .
{Moving, e.g. rotary, diffusers; Stationary diffusers with moving, e.g. rotary, distributors} [2013-01]
C02F 3/206
. . . . .
{with helical screw impellers} [2013-01]
C02F 3/207
. . . . .
{with axial thrust propellers} [2013-01]
C02F 3/208
. . . .
{Membrane aeration (C02F 3/201 takes precedence)} [2013-01]
C02F 3/22
. . .
using circulation pipes [2013-01]
C02F 3/223
. . . .
{using "air-lift"} [2013-01]
C02F 3/226
. . . .
{"Deep shaft" processes} [2013-01]
C02F 3/24
. . .
using free-fall aeration or spraying [2013-01]
C02F 3/26
. . .
using pure oxygen or oxygen-rich gas [2013-01]
C02F 3/28
.
Anaerobic digestion processes [2013-01]
C02F 3/2806
. .
{Anaerobic processes using solid supports for microorganisms} [2017-08]
C02F 3/2813
. .
{using anaerobic contact processes} [2013-01]
C02F 3/282
. .
{using anaerobic sequencing batch reactors} [2013-01]
C02F 3/2826
. .
{using anaerobic filters} [2013-01]
C02F 3/2833
. .
{using fluidized bed reactors} [2013-01]
C02F 3/284
. .
{using anaerobic baffled reactors} [2013-01]
C02F 3/2846
. .
{using upflow anaerobic sludge blanket [UASB] reactors} [2013-01]
C02F 3/2853
. .
{using anaerobic membrane bioreactors} [2013-01]
C02F 3/286
. .
{including two or more steps} [2013-01]
C02F 3/2866
. .
{Particular arrangements for anaerobic reactors} [2013-01]
C02F 3/2873
. . .
{with internal draft tube circulation} [2013-01]
C02F 3/288
. . .
{comprising septic tanks combined with a filter} [2013-01]
C02F 3/2886
. . .
{Two story combinations of the Imhoff tank type} [2013-01]
C02F 3/2893
. . .
{with biogas recycling} [2013-01]
C02F 3/30
.
Aerobic and anaerobic processes [2013-01]
C02F 3/301
. .
{Aerobic and anaerobic treatment in the same reactor} [2013-01]
C02F 3/302
. .
{Nitrification and denitrification treatment (C02F 3/308 takes precedence)} [2013-01]
C02F 3/303
. . .
{characterised by the nitrification} [2013-01]
C02F 3/305
. . .
{characterised by the denitrification} [2013-01]
C02F 3/306
. . . .
{Denitrification of water in soil} [2013-01]
C02F 3/307
. . .
{characterised by direct conversion of nitrite to molecular nitrogen, e.g. by using the Anammox process} [2013-01]
C02F 3/308
. .
{Biological phosphorus removal} [2013-01]
C02F 3/32
.
characterised by the animals or plants used, e.g. algae [2013-01]
C02F 3/322
. .
{use of algae} [2013-01]
C02F 3/325
. . .
{as symbiotic combination of algae and bacteria} [2013-01]
C02F 3/327
. .
{characterised by animals and plants} [2013-01]
C02F 3/34
.
characterised by the microorganisms used [2017-08]
C02F 3/341
. .
{Consortia of bacteria} [2013-01]
C02F 3/342
. .
{characterised by the enzymes used} [2013-01]
C02F 3/343
. .
{for digestion of grease, fat, oil} [2013-01]
C02F 3/344
. .
{for digestion of mineral oil} [2013-01]
C02F 3/345
. .
{for biological oxidation or reduction of sulfur compounds} [2013-01]
C02F 3/346
. .
{Iron bacteria} [2013-01]
C02F 3/347
. .
{Use of yeasts or fungi (C02F 3/322 takes precedence)} [2013-01]
C02F 3/348
. .
{characterised by the way or the form in which the microorganisms are added or dosed} [2013-01]
C02F 5/00
Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents (softening using ion-exchange C02F 1/42) [2013-01]
C02F 5/02
.
Softening water by precipitation of the hardness [2013-01]
C02F 5/025
. .
{Hot-water softening devices} [2013-01]
C02F 5/04
. .
using phosphates (C02F 5/06 takes precedence) [2013-01]
C02F 5/06
. .
using calcium compounds [2013-01]
C02F 5/08
.
Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents [2013-01]
C02F 5/083
. .
{Mineral agents} [2013-01]
C02F 5/086
. .
{Condensed phosphates} [2013-01]
C02F 5/10
. .
using organic substances [2013-01]
C02F 5/105
. . .
{combined with inorganic substances} [2013-01]
C02F 5/12
. . .
containing nitrogen (C02F 5/14 takes precedence) [2013-01]
C02F 5/125
. . . .
{combined with inorganic substances} [2013-01]
C02F 5/14
. . .
containing phosphorus [2013-01]
C02F 5/145
. . . .
{combined with inorganic substances} [2013-01]
C02F 7/00
Aeration of stretches of water [2013-01]
​
C02F 9/00
Multistage treatment of water, waste water or sewage [2023-01]
NOTES

  • This group covers combined treatment operations, carried out in a defined order in three or more different treatment stages, each stage occurring in a separate location, e.g. apparatus, reactor or compartment.
  • This group does not cover treatments where the essential characteristic resides in an individual step of the treatment, which treatments are covered by groups C02F 1/00 - C02F 7/00.
C02F 9/20
.
Portable or detachable small-scale multistage treatment devices, e.g. point of use or laboratory water purification systems [2023-01]
C02F 11/00
Treatment of sludge; Devices therefor [2013-01]
C02F 11/002
.
{Sludge treatment using liquids immiscible with water} [2013-01]
C02F 11/004
.
{Sludge detoxification} [2013-01]
C02F 11/006
.
{Electrochemical treatment, e.g. electro-oxidation or electro-osmosis} [2013-01]
C02F 11/008
.
{Sludge treatment by fixation or solidification} [2013-01]
C02F 11/02
.
Biological treatment [2013-01]
C02F 11/04
. .
Anaerobic treatment; Production of methane by such processes [2013-01]
C02F 11/06
.
by oxidation (incinerators for burning waste liquors, e.g. sulfite liquor from paper-making plant F23G 7/04) [2013-01]
C02F 11/08
. .
Wet air oxidation [2013-01]
C02F 11/083
. . .
{using deep well reactors} [2013-01]
C02F 11/086
. . .
{in the supercritical state} [2013-01]
C02F 11/10
.
by pyrolysis [2013-01]
C02F 11/12
.
by de-watering, drying or thickening [2022-05]
C02F 11/121
. .
by mechanical de-watering [2019-01]
C02F 11/122
. . .
using filter presses (C02F 11/123 takes precedence) [2019-01]
C02F 11/123
. . .
using belt or band filters [2019-01]
C02F 11/125
. . .
using screw filters [2019-01]
C02F 11/126
. . .
using drum filters [2019-01]
C02F 11/127
. . .
by centrifugation [2019-01]
C02F 11/128
. . .
using batch processes [2019-01]
C02F 11/13
. .
by heating [2022-05]
C02F 11/131
. . .
using electromagnetic or ultrasonic waves [2022-05]
C02F 11/14
. .
with addition of chemical agents [2022-05]
C02F 11/143
. . .
using inorganic substances (C02F 11/148 takes precedence) [2022-05]
C02F 11/145
. . . .
using calcium compounds [2022-05]
C02F 11/147
. . .
using organic substances (C02F 11/148 takes precedence) [2022-05]
C02F 11/148
. . .
Combined use of inorganic and organic substances, being added in the same treatment step [2022-05]
C02F 11/15
. .
by treatment with electric, magnetic or electromagnetic fields; by treatment with ultrasonic waves (for the purpose of heating C02F 11/131) [2022-05]
C02F 11/16
. .
using drying or composting beds [2013-01]
C02F 11/18
.
by thermal conditioning (by pyrolysis C02F 11/10) [2022-05]
C02F 11/185
. .
{by pasteurisation} [2022-05]
C02F 11/20
. .
by freezing [2013-01]
C02F 2101/00
Nature of the contaminant [2013-01]
C02F 2101/003
.
{Explosive compounds, e.g. TNT} [2015-10]
C02F 2101/006
.
{Radioactive compounds} [2015-10]
C02F 2101/10
.
Inorganic compounds [2013-01]
C02F 2101/101
. .
{Sulfur compounds} [2015-10]
C02F 2101/103
. .
{Arsenic compounds} [2015-10]
C02F 2101/105
. .
{Phosphorus compounds} [2015-10]
C02F 2101/106
. .
{Selenium compounds} [2015-10]
C02F 2101/108
. .
{Boron compounds} [2015-10]
C02F 2101/12
. .
Halogens or halogen-containing compounds [2013-01]
C02F 2101/14
. . .
Fluorine or fluorine-containing compounds [2013-01]
C02F 2101/16
. .
Nitrogen compounds, e.g. ammonia [2013-01]
C02F 2101/163
. . .
{Nitrates} [2015-10]
C02F 2101/166
. . .
{Nitrites} [2015-10]
C02F 2101/18
. . .
Cyanides [2013-01]
C02F 2101/20
. .
Heavy metals or heavy metal compounds [2013-01]
C02F 2101/203
. . .
{Iron or iron compound} [2015-10]
C02F 2101/206
. . .
{Manganese or manganese compounds} [2015-10]
C02F 2101/22
. . .
Chromium or chromium compounds, e.g. chromates [2013-01]
C02F 2101/30
.
Organic compounds [2013-01]
C02F 2101/301
. .
{Detergents, surfactants} [2015-10]
C02F 2101/303
. .
{Complexing agents} [2015-10]
C02F 2101/305
. .
{Endocrine disruptive agents} [2015-10]
C02F 2101/306
. .
{Pesticides} [2015-10]
C02F 2101/308
. .
{Dyes; Colorants; Fluorescent agents} [2015-10]
C02F 2101/32
. .
Hydrocarbons, e.g. oil [2013-01]
C02F 2101/322
. . .
{Volatile compounds, e.g. benzene} [2015-10]
C02F 2101/325
. . .
{Emulsions} [2015-10]
C02F 2101/327
. . .
{Polyaromatic Hydrocarbons [PAH's]} [2015-10]
C02F 2101/34
. .
containing oxygen [2013-01]
C02F 2101/345
. . .
{Phenols} [2015-10]
C02F 2101/36
. .
containing halogen [2013-01]
C02F 2101/363
. . .
{PCB's; PCP's} [2015-10]
C02F 2101/366
. . .
{Dioxine; Furan} [2015-10]
C02F 2101/38
. .
containing nitrogen [2013-01]
C02F 2101/40
. .
{containing sulfur} [2023-08]
C02F 2103/00
Nature of the water, waste water, sewage or sludge to be treated [2013-01]
C02F 2103/001
.
{Runoff or storm water} [2015-10]
C02F 2103/002
.
{Grey water, e.g. from clothes washers, showers or dishwashers} [2015-10]
C02F 2103/003
.
{Wastewater from hospitals, laboratories and the like, heavily contaminated by pathogenic microorganisms} [2015-10]
C02F 2103/005
.
{Black water originating from toilets} [2015-10]
C02F 2103/006
.
{Dental effluents} [2015-10]
C02F 2103/007
.
{Contaminated open waterways, rivers, lakes or ponds} [2015-10]
C02F 2103/008
.
{Originating from marine vessels, ships and boats, e.g. bilge water or ballast water} [2015-10]
C02F 2103/02
.
Non-contaminated water, e.g. for industrial water supply [2013-01]
C02F 2103/023
. .
{Water in cooling circuits} [2015-10]
C02F 2103/026
. .
{Treating water for medical or cosmetic purposes} [2015-10]
C02F 2103/04
. .
for obtaining ultra-pure water [2017-08]
C02F 2103/06
.
Contaminated groundwater or leachate [2013-01]
C02F 2103/08
.
Seawater, e.g. for desalination [2013-01]
C02F 2103/10
.
from quarries or from mining activities [2013-01]
C02F 2103/12
.
from the silicate or ceramic industries, e.g. waste waters from cement or glass factories [2013-01]
C02F 2103/14
.
Paint wastes [2013-01]
C02F 2103/16
.
from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes [2013-01]
C02F 2103/18
.
from the purification of gaseous effluents [2013-01]
C02F 2103/20
.
from animal husbandry [2013-01]
C02F 2103/22
.
from the processing of animals, e.g. poultry, fish, or parts thereof [2013-01]
C02F 2103/24
. .
from tanneries [2013-01]
C02F 2103/26
.
from the processing of plants or parts thereof [2013-01]
C02F 2103/28
. .
from the paper or cellulose industry [2013-01]
C02F 2103/30
.
from the textile industry [2013-01]
C02F 2103/32
.
from the food or foodstuff industry, e.g. brewery waste waters [2013-01]
C02F 2103/322
. .
{from vegetable oil production, e.g. olive oil production} [2015-10]
C02F 2103/325
. .
{from processes relating to the production of wine products} [2015-10]
C02F 2103/327
. .
{from processes relating to the production of dairy products} [2015-10]
C02F 2103/34
.
from industrial activities not provided for in groups C02F 2103/12 - C02F 2103/32 [2016-05]
C02F 2103/343
. .
{from the pharmaceutical industry, e.g. containing antibiotics} [2015-10]
C02F 2103/346
. .
{from semiconductor processing, e.g. waste water from polishing of wafers} [2015-10]
C02F 2103/36
. .
from the manufacture of organic compounds [2013-01]
C02F 2103/365
. . .
{from petrochemical industry (e.g. refineries)} [2015-10]
C02F 2103/38
. . .
Polymers [2013-01]
C02F 2103/40
. .
from the manufacture or use of photosensitive materials [2013-01]
C02F 2103/42
.
from bathing facilities, e.g. swimming pools [2013-01]
C02F 2103/44
.
from vehicle washing facilities [2013-01]
C02F 2201/00
Apparatus for treatment of water, waste water or sewage [2013-01]
C02F 2201/001
.
Build in apparatus for autonomous on board water supply and wastewater treatment (e.g. for aircrafts, cruiseships, oil drilling platforms, railway trains, space stations) [2013-01]
C02F 2201/002
.
Construction details of the apparatus [2013-01]
C02F 2201/003
. .
Coaxial constructions, e.g. a cartridge located coaxially within another [2013-01]
C02F 2201/004
. .
Seals, connections [2013-01]
C02F 2201/005
. .
Valves [2013-01]
C02F 2201/006
. .
Cartridges [2013-01]
C02F 2201/007
. .
Modular design [2013-01]
C02F 2201/008
.
Mobile apparatus and plants, e.g. mounted on a vehicle [2024-08]
C02F 2201/009
.
Apparatus with independent power supply, e.g. solar cells, windpower or fuel cells [2024-08]
C02F 2201/32
.
Details relating to UV-irradiation devices [2013-01]
C02F 2201/322
. .
Lamp arrangement [2013-01]
C02F 2201/3221
. . .
Lamps suspended above a water surface or pipe [2013-01]
C02F 2201/3222
. . .
Units using UV-light emitting diodes [LED] [2013-01]
C02F 2201/3223
. . .
Single elongated lamp located on the central axis of a turbular reactor [2013-01]
C02F 2201/3224
. . .
Units using UV-light guiding optical fibers [2013-01]
C02F 2201/3225
. . .
Lamps immersed in an open channel, containing the liquid to be treated [2013-01]
C02F 2201/3226
. . .
Units using UV-light emitting lasers [2013-01]
C02F 2201/3227
. . .
Units with two or more lamps [2013-01]
C02F 2201/3228
. . .
Units having reflectors, e.g. coatings, baffles, plates, mirrors [2013-01]
C02F 2201/324
. .
Lamp cleaning installations, e.g. brushes [2013-01]
C02F 2201/326
. .
Lamp control systems [2013-01]
C02F 2201/328
. .
Having flow diverters (baffles) [2013-01]
C02F 2201/46
.
Apparatus for electrochemical processes [2013-01]
C02F 2201/461
. .
Electrolysis apparatus [2013-01]
C02F 2201/46105
. . .
Details relating to the electrolytic devices [2013-01]
C02F 2201/4611
. . . .
Fluid flow [2013-01]
C02F 2201/46115
. . . .
Electrolytic cell with membranes or diaphragms [2013-01]
C02F 2201/4612
. . . .
Controlling or monitoring [2013-01]
C02F 2201/46125
. . . . .
Electrical variables [2013-01]
C02F 2201/4613
. . . . . .
Inversing polarity [2013-01]
C02F 2201/46135
. . . . . .
Voltage [2013-01]
C02F 2201/4614
. . . . . .
Current [2013-01]
C02F 2201/46145
. . . . .
Fluid flow [2013-01]
C02F 2201/4615
. . . . .
Time [2013-01]
C02F 2201/46155
. . . .
Heating or cooling [2013-01]
C02F 2201/4616
. . . .
Power supply [2013-01]
C02F 2201/46165
. . . . .
Special power supply, e.g. solar energy or batteries [2013-01]
C02F 2201/4617
. . . . .
DC only [2013-01]
C02F 2201/46175
. . . . .
Electrical pulses [2013-01]
C02F 2201/4618
. . . .
Supplying or removing reactants or electrolyte [2013-01]
C02F 2201/46185
. . . . .
Recycling the cathodic or anodic feed [2013-01]
C02F 2201/4619
. . . .
Supplying gas to the electrolyte [2024-08]
C02F 2201/46195
. . . .
Cells containing solid electrolyte [2013-01]
C02F 2201/48
.
Devices for applying magnetic or electric fields [2013-01]
C02F 2201/483
. .
using coils [2013-01]
C02F 2201/486
. .
using antenna [2013-01]
C02F 2201/78
.
Details relating to ozone treatment devices [2013-01]
C02F 2201/782
. .
Ozone generators [2013-01]
C02F 2201/784
. .
Diffusers or nozzles for ozonation [2013-01]
C02F 2203/00
Apparatus and plants for the biological treatment of water, waste water or sewage [2013-01]
C02F 2203/002
.
comprising an initial buffer container [2013-01]
C02F 2203/004
.
comprising a selector reactor for promoting floc-forming or other bacteria [2013-01]
C02F 2203/006
.
details of construction, e.g. specially adapted seals, modules, connections [2013-01]
C02F 2203/008
.
Mobile apparatus and plants, e.g. mounted on a vehicle [2013-01]
C02F 2209/00
Controlling or monitoring parameters in water treatment [2013-01]
C02F 2209/001
.
Upstream control, i.e. monitoring for predictive control [2013-01]
C02F 2209/003
.
Downstream control, i.e. outlet monitoring, e.g. to check the treating agents, such as halogens or ozone, leaving the process [2013-01]
C02F 2209/005
.
Processes using a programmable logic controller [PLC] [2013-01]
C02F 2209/006
. .
comprising a software program or a logic diagram [2013-01]
C02F 2209/008
. .
comprising telecommunication features, e.g. modems or antennas [2013-01]
C02F 2209/01
.
Density [2013-01]
C02F 2209/02
.
Temperature [2013-01]
C02F 2209/03
.
Pressure [2013-01]
C02F 2209/04
.
Oxidation reduction potential [ORP] [2013-01]
C02F 2209/05
.
Conductivity or salinity [2013-01]
C02F 2209/055
. .
Hardness [2013-01]
C02F 2209/06
.
pH [2013-01]
C02F 2209/07
.
Alkalinity [2013-01]
C02F 2209/08
.
Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD] [2013-01]
C02F 2209/09
.
Viscosity [2013-01]
C02F 2209/10
.
Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS] [2013-01]
C02F 2209/105
. .
Particle number, particle size or particle characterisation [2013-01]
C02F 2209/11
.
Turbidity [2013-01]
C02F 2209/12
.
Volatile Fatty Acids (VFAs) [2013-01]
C02F 2209/14
.
NH3-N [2013-01]
C02F 2209/15
.
N03-N [2013-01]
C02F 2209/16
.
Total nitrogen (tkN-N) [2013-01]
C02F 2209/18
.
PO4-P [2013-01]
C02F 2209/19
.
SO4-S [2013-01]
C02F 2209/20
.
Total organic carbon [TOC] [2013-01]
C02F 2209/21
.
Dissolved organic carbon [DOC] [2013-01]
C02F 2209/22
.
O2 [2013-01]
C02F 2209/225
. .
in the gas phase [2013-01]
C02F 2209/23
.
O3 [2013-01]
C02F 2209/235
. .
in the gas phase [2013-01]
C02F 2209/24
.
CO2 [2013-01]
C02F 2209/245
. .
in the gas phase [2013-01]
C02F 2209/26
.
H2S [2013-01]
C02F 2209/265
. .
in the gas phase [2013-01]
C02F 2209/28
.
CH4 [2013-01]
C02F 2209/285
. .
CH4 in the gas phase [2013-01]
C02F 2209/29
.
Chlorine compounds [2013-01]
C02F 2209/30
.
H2 [2013-01]
C02F 2209/32
.
CO [2013-01]
C02F 2209/34
.
N2O [2013-01]
C02F 2209/36
.
Biological material, e.g. enzymes or ATP [2013-01]
C02F 2209/38
.
Gas flow rate [2013-01]
C02F 2209/40
.
Liquid flow rate [2013-01]
C02F 2209/42
.
Liquid level [2013-01]
C02F 2209/44
.
Time [2013-01]
C02F 2209/445
. .
Filter life [2013-01]
C02F 2301/00
General aspects of water treatment [2013-01]
C02F 2301/02
.
Fluid flow conditions [2013-01]
C02F 2301/022
. .
Laminar [2013-01]
C02F 2301/024
. .
Turbulent [2013-01]
C02F 2301/026
. .
Spiral, helicoidal, radial [2013-01]
C02F 2301/028
. .
Tortuous [2013-01]
C02F 2301/04
.
Flow arrangements [2013-01]
C02F 2301/043
. .
Treatment of partial or bypass streams [2013-01]
C02F 2301/046
. .
Recirculation with an external loop [2013-01]
C02F 2301/06
.
Pressure conditions [2013-01]
C02F 2301/063
. .
Underpressure, vacuum [2013-01]
C02F 2301/066
. .
Overpressure, high pressure [2013-01]
C02F 2301/08
.
Multistage treatments, e.g. repetition of the same process step under different conditions [2013-01]
C02F 2301/10
.
Temperature conditions for biological treatment [2013-01]
C02F 2301/103
. .
Psychrophilic treatment [2013-01]
C02F 2301/106
. .
Thermophilic treatment [2013-01]
C02F 2303/00
Specific treatment goals [2013-01]
C02F 2303/02
.
Odour removal or prevention of malodour [2013-01]
C02F 2303/04
.
Disinfection [2013-01]
C02F 2303/06
.
Sludge reduction, e.g. by lysis [2013-01]
C02F 2303/08
.
Corrosion inhibition [2013-01]
C02F 2303/10
.
Energy recovery [2013-01]
C02F 2303/12
.
Prevention of foaming [2013-01]
C02F 2303/14
.
Maintenance of water treatment installations [2013-01]
C02F 2303/16
.
Regeneration of sorbents, filters [2013-01]
C02F 2303/18
.
Removal of treatment agents after treatment [2013-01]
C02F 2303/185
. .
The treatment agent being halogen or a halogenated compound [2013-01]
C02F 2303/20
.
Prevention of biofouling [2013-01]
C02F 2303/22
.
Eliminating or preventing deposits, scale removal, scale prevention (C02F 1/042, C02F 1/4602, C02F 5/00 take precedence) [2013-01]
C02F 2303/24
.
Separation of coarse particles, e.g. by using sieves or screens [2013-01]
C02F 2303/26
.
Reducing the size of particles, liquid droplets or bubbles, e.g. by crushing, grinding, spraying, creation of microbubbles or nanobubbles [2017-08]
C02F 2305/00
Use of specific compounds during water treatment [2013-01]
C02F 2305/02
.
Specific form of oxidant [2013-01]
C02F 2305/023
. .
Reactive oxygen species, singlet oxygen, OH radical [2013-01]
C02F 2305/026
. .
Fenton's reagent [2013-01]
C02F 2305/04
.
Surfactants, used as part of a formulation or alone [2013-01]
C02F 2305/06
.
Nutrients for stimulating the growth of microorganisms [2013-01]
C02F 2305/08
.
Nanoparticles or nanotubes [2013-01]
C02F 2305/10
.
Photocatalysts [2013-01]
C02F 2305/12
.
Inert solids used as ballast for improving sedimentation (C02F 3/1226 takes precedence) [2013-01]
C02F 2305/14
.
Additives which dissolves or releases substances when predefined environmental conditions are reached, e.g. pH or temperature [2013-01]
C02F 2307/00
Location of water treatment or water treatment device [2013-01]
C02F 2307/02
.
as part of a bottle [2013-01]
C02F 2307/04
.
as part of a pitcher or jug [2013-01]
C02F 2307/06
.
Mounted on or being part of a faucet, shower handle or showerhead [2013-01]
C02F 2307/08
.
Treatment of wastewater in the sewer, e.g. to reduce grease, odour [2013-01]
C02F 2307/10
.
as part of a potable water dispenser, e.g. for use in homes or offices [2013-01]
C02F 2307/12
.
as part of household appliances such as dishwashers, laundry washing machines or vacuum cleaners [2013-01]
C02F 2307/14
.
Treatment of water in water supply networks, e.g. to prevent bacterial growth [2013-01]