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Outline
Indent Level
Color Curly Brackets (indicating CPC extensions to IPC) References Date Revised
Search Symbol
CPC
COOPERATIVE PATENT CLASSIFICATION
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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) [2013‑01]
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



  • The following IPC groups are not used in the CPC system. Subject matter covered by these groups is classified in the following CPC groups:
    C02F9/02 to C02F9/14 covered by C02F 9/00 and subgroup
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Treatment of water, waste water, or sewage (C02F 3/00 to C02F 9/00 take precedence) [2013‑01]
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.
{
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 to B01D 41/00)
}
[2013‑01]
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 9/005 takes precedence)
}
[2013‑01]
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]
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.
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]
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. .
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]
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. . .
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]
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.
by extraction [2013‑01]
C02F 1/265
. .
{
Desalination
}
[2013‑01]
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.
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]
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.
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
}
[2013‑01]
WARNING

  • Not complete pending the completion of a reclassification, see also C02F 1/30
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. .
with ultra-violet light [2013‑01]
C02F 1/325
. . .
{
Irradiation devices or lamp constructions
}
[2013‑01]
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.
with mechanical oscillations [2013‑01]
C02F 1/36
. .
ultrasonic vibrations [2013‑01]
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.
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]
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.
by ion-exchange (ion-exchange in general B01J) [2013‑01]
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]
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.
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]
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.
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 desinfect the water
}
[2013‑01]
C02F 1/4608
. .
{
using electrical discharges
}
[2013‑01]
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C02F 1/461
. .
by electrolysis [2013‑01]
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. . .
{
Devices therefor; Their operating or servicing
}
[2013‑01]
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. . . .
{
Electrodes
}
[2013‑01]
NOTE

C02F 1/46114
. . . . .
{
Electrodes in particulate form or with conductive and/or non conductive particules between them
}
[2013‑01]
C02F 2001/46119
. . . . .
{
Cleaning the electrodes
}
[2013‑01]
C02F 2001/46123
. . . . .
{
Movable electrodes
}
[2013‑01]
C02F 2001/46128
. . . . .
{
Bipolar electrodes
}
[2013‑01]
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C02F 2001/46133
. . . . .
{
characterised by the material
}
[2013‑01]
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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]
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C02F 2001/46152
. . . . .
{
characterised by the shape or form (electrodes in particulate form or with conductive or non-conductive particles between them C02F 1/46114)
}
[2013‑01]
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C02F 2001/46157
. . . . . .
{
Perforated or foraminous electrodes
}
[2013‑01]
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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]
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. . . .
{
for producing "ionised" acidic or basic water
}
[2013‑01]
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 to 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]
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C02F 1/467
. . .
by electrochemical desinfection;
{
by electrooxydation or by electroreduction
}
[2013‑01]
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. . . .
{
by electrooxydation
}
[2013‑01]
C02F 1/4674
. . . . .
{
with halogen or compound of halogens, e.g. chlorine, bromine
}
[2013‑01]
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. . . .
{
by electroreduction
}
[2013‑01]
C02F 1/4678
. . . . .
{
of metals
}
[2013‑01]
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. .
by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis [2013‑01]
C02F 1/4691
. . .
{
Capacitive deionisation
}
[2013‑01]
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. . .
{
electrodialysis
}
[2013‑01]
C02F 1/4695
. . . .
{
electrodeionisation
}
[2013‑01]
C02F 1/4696
. . .
{
electrophoresis
}
[2013‑01]
C02F 1/4698
. . .
{
electro-osmosis
}
[2013‑01]
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.
with magnetic or electric fields (C02F 1/46 takes precedence) [2013‑01]
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. .
{
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]
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. .
{
using electromagnets
}
[2013‑01]
WARNING

  • Not complete pending the completion of a reclassification, see also C02F 1/48 and C02F1/48C
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
}
[2013‑01]
WARNING

  • Not complete pending the completion of a reclassification, see also C02F 1/48
C02F 1/487
. .
{
using high frequency electromagnetic fields, e.g. pulsed electromagnetic fields
}
[2013‑01]
WARNING

  • Not complete pending the completion of a reclassification, see also C02F 1/48
C02F 1/488
. .
{
for separation of magnetic materials, e.g. magnetic flocculation
}
[2013‑01]
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.
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]
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.
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]
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. .
{
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]
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. .
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]
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.
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]
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C02F 1/62
. .
Heavy metal compounds [2013‑01]
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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]
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.
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]
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. .
{
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]
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.
by reduction
{
(C02F 1/4676 takes precedence)
}
[2013‑01]
C02F 1/705
. .
{
Reduction by metals
}
[2013‑01]
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.
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]
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. .
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]
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Biological treatment of water, waste water, or sewage
{
(C02F 1/006 takes precedence)
}
[2013‑01]
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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]
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.
Aerobic processes [2013‑01]
C02F 3/025
. .
{
Biological purification using sources of oxygen other than air, oxygen or ozone
}
[2013‑01]
Collapse
. .
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]
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. .
using moving contact bodies [2013‑01]
C02F 3/082
. . .
{
Rotating biological contactors
}
[2013‑01]
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C02F 3/085
. . .
{
Fluidized beds
}
[2013‑01]
C02F 3/087
. . . .
{
Floating beds with contact bodies having a lower density than water
}
[2013‑01]
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. .
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]
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. . .
{
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]
Collapse
. .
Activated sludge processes [2013‑01]
Collapse
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]
Collapse
C02F 3/1236
. . .
{
Particular type of activated sludge installations
}
[2013‑01]
Collapse
. . . .
{
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]
Collapse
. . . .
{
Membrane bioreactor systems
}
[2013‑01]
C02F 3/1273
. . . . .
{
Submerged membrane bioreactors
}
[2013‑01]
Collapse
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]
Collapse
. . .
using surface aeration [2013‑01]
C02F 3/145
. . . .
{
Protection against aerosols
}
[2013‑01]
Collapse
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]
Collapse
. . .
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]
Collapse
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]
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. . .
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]
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.
Anaerobic digestion processes [2013‑01]
C02F 3/2806
. .
{
Anaerobic processes using solid supports for micro-organisms
}
[2013‑01]
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]
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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]
Collapse
.
Aerobic and anaerobic processes [2013‑01]
C02F 3/301
. .
{
Aerobic and anaerobic treatment in the same reactor
}
[2013‑01]
Collapse
. .
{
Nitrification and denitrification treatment (C02F 3/308 takes precedence)
}
[2013‑01]
C02F 3/303
. . .
{
characterised by the nitrification
}
[2013‑01]
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. . .
{
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]
Collapse
C02F 3/32
.
characterised by the animals or plants used, e.g. algae [2013‑01]
Collapse
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]
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.
characterised by the micro-organisms used [2013‑01]
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]
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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]
Collapse
.
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]
Collapse
.
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]
Collapse
. .
using organic substances [2013‑01]
C02F 5/105
. . .
{
combined with inorganic substances
}
[2013‑01]
Collapse
. . .
containing nitrogen (C02F 5/14 takes precedence) [2013‑01]
C02F 5/125
. . . .
{
combined with inorganic substances
}
[2013‑01]
Collapse
. . .
containing phosphorus [2013‑01]
C02F 5/145
. . . .
{
combined with inorganic substances
}
[2013‑01]
C02F 7/00
Aeration of stretches of water [2013‑01]
Collapse
Multistage treatment of water, waste water, or sewage [2013‑01]
NOTE

  • This group covers only those combined treating operations where the interest is directed to the relationship between the steps.
  • This group does not cover, for example, chemical treatment followed by settlement or biological treatment involving normal mechanical treatment.
C02F 9/005
.
{
Portable or detachable small-scale multistage treatment devices, e.g. point of use or laboratory water purification systems (single-stage processes in combination with filtration techniques C02F 1/002 or C02F 1/003)
}
[2013‑01]
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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]
Collapse
.
Biological treatment [2013‑01]
C02F 11/04
. .
Anaerobic treatment; Production of methane by such processes [2013‑01]
Collapse
.
by oxidation (incinerators for burning waste liquors, e.g. sulfite liquor from paper-making plant F23G 7/04) [2013‑01]
Collapse
. .
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]
Collapse
.
by de-watering, drying, or thickening [2013‑01]
Collapse
C02F 11/121
. .
{
Processes for mechanical dehydration of sludge, e.g. by filters
}
[2013‑01]
C02F 11/122
. . .
using press filters (C02F 11/123 takes precedence) [2013‑01]
C02F 11/123
. . .
using belt or band filters [2013‑01]
C02F 11/125
. . .
using screw filters [2013‑01]
C02F 11/126
. . .
using drum filters [2013‑01]
C02F 11/127
. . .
by centrifugation [2013‑01]
C02F 11/128
. . .
Batch processes [2013‑01]
C02F 11/14
. .
with addition of chemical agents [2013‑01]
C02F 11/16
. .
using drying or composting beds [2013‑01]
Collapse
.
by thermal conditioning (by pyrolysis C02F 11/10) [2013‑01]
C02F 11/185
. .
{
by pasteurisation
}
[2013‑01]
C02F 11/20
. .
by freezing [2013‑01]
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Nature of the contaminant [2013‑01]
C02F 2101/003
.
Explosive compounds, e.g. TNT [2013‑01]
C02F 2101/006
.
Radioactive compounds [2013‑01]
Collapse
C02F 2101/10
.
Inorganic compounds [2013‑01]
C02F 2101/101
. .
Sulfur compounds [2013‑01]
C02F 2101/103
. .
Arsenic compounds [2013‑01]
C02F 2101/105
. .
Phosphorus compounds [2013‑01]
C02F 2101/106
. .
Selenium compounds [2013‑01]
C02F 2101/108
. .
Boron compounds [2013‑01]
Collapse
C02F 2101/12
. .
Halogens or halogen-containing compounds [2013‑01]
C02F 2101/14
. . .
Fluorine or fluorine-containing compounds [2013‑01]
Collapse
C02F 2101/16
. .
Nitrogen compounds, e.g. ammonia [2013‑01]
C02F 2101/163
. . .
Nitrates [2013‑01]
C02F 2101/166
. . .
Nitrites [2013‑01]
C02F 2101/18
. . .
Cyanides [2013‑01]
Collapse
C02F 2101/20
. .
Heavy metals or heavy metal compounds [2013‑01]
C02F 2101/203
. . .
Iron or iron compound [2013‑01]
C02F 2101/206
. . .
Manganese or manganese compounds [2013‑01]
C02F 2101/22
. . .
Chromium or chromium compounds, e.g. chromates [2013‑01]
Collapse
C02F 2101/30
.
Organic compounds [2013‑01]
C02F 2101/301
. .
Detergents, surfactants [2013‑01]
C02F 2101/303
. .
Complexing agents [2013‑01]
C02F 2101/305
. .
Endocrine disruptive agents [2013‑01]
C02F 2101/306
. .
Pesticides [2013‑01]
C02F 2101/308
. .
Dyes; Colorants; Fluorescent agents [2013‑01]
Collapse
C02F 2101/32
. .
Hydrocarbons, e.g. oil [2013‑01]
C02F 2101/322
. . .
Volatile compounds, e.g. benzene [2013‑01]
C02F 2101/325
. . .
Emulsions [2013‑01]
C02F 2101/327
. . .
Polyaromatic Hydrocarbons (PAH's) [2013‑01]
Collapse
C02F 2101/34
. .
containing oxygen [2013‑01]
C02F 2101/345
. . .
Phenols [2013‑01]
Collapse
C02F 2101/36
. .
containing halogen [2013‑01]
C02F 2101/363
. . .
PCB`s; PCP`s [2013‑01]
C02F 2101/366
. . .
Dioxine; Furan [2013‑01]
C02F 2101/38
. .
containing nitrogen [2013‑01]
C02F 2101/40
. .
containing sulfur [2013‑01]
Collapse
Nature of the water, waste water, sewage or sludge to be treated [2013‑01]
C02F 2103/001
.
Runoff or storm water [2013‑01]
C02F 2103/002
.
Grey water, e.g. from clothes washers, showers or dishwashers [2013‑01]
C02F 2103/003
.
Wastewater from hospitals, laboratories and the like, heavily contaminated by pathogenic microorganisms [2013‑01]
C02F 2103/005
.
Black water originating from toilets [2013‑01]
C02F 2103/006
.
Dental effluents [2013‑01]
C02F 2103/007
.
Contaminated open waterways, rivers, lakes or ponds [2013‑01]
C02F 2103/008
.
Originating from marine vessels, ships and boats, e.g. bilge water or ballast water [2013‑01]
Collapse
C02F 2103/02
.
Non-contaminated water, e.g. for industrial water supply [2013‑01]
C02F 2103/023
. .
Water in cooling circuits [2013‑01]
C02F 2103/026
. .
Treating water for medical or cosmetic purposes [2013‑01]
C02F 2103/04
. .
For obtaining ultra-pure water [2013‑01]
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]
Collapse
C02F 2103/22
.
from the processing of animals, e.g. poultry, fish, or parts thereof [2013‑01]
C02F 2103/24
. .
from tanneries [2013‑01]
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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]
Collapse
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 [2013‑01]
C02F 2103/325
. .
from processes relating to the production of wine products [2013‑01]
C02F 2103/327
. .
from processes relating to the production of dairy products [2013‑01]
Collapse
C02F 2103/34
.
from industrial activities not provided for in groups C02F 2103/12 to C02F 2103/32 [2013‑01]
C02F 2103/343
. .
from the pharmaceutical industry, e.g. containing antibiotics [2013‑01]
C02F 2103/346
. .
from semiconductor processing, e.g. waste water from polishing of wafers [2013‑01]
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C02F 2103/36
. .
from the manufacture of organic compounds [2013‑01]
C02F 2103/365
. . .
from petrochemical industry (e.g. refineries) [2013‑01]
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]
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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]
Collapse
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 (for biological treatment C02F 2203/008) [2013‑01]
C02F 2201/009
.
Apparatus with independent power supply, e.g. solar cells, windpower, fuel cells (for electrolysis apparatus C02F 2201/46165) [2013‑01]
Collapse
C02F 2201/32
.
Details relating to UV-irradiation devices [2013‑01]
Collapse
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]
Collapse
C02F 2201/46
.
Apparatus for electrochemical processes [2013‑01]
Collapse
C02F 2201/461
. .
Electrolysis apparatus [2013‑01]
Collapse
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]
Collapse
C02F 2201/4612
. . . .
Controlling or monitoring [2013‑01]
Collapse
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]
Collapse
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]
Collapse
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 (gas diffusion electrodes C02F 2001/46166) [2013‑01]
C02F 2201/46195
. . . .
Cells containing solid electrolyte [2013‑01]
Collapse
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]
Collapse
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]
Collapse
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]
Collapse
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]
Collapse
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]
Collapse
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]
Collapse
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]
Collapse
C02F 2209/22
.
O2 [2013‑01]
C02F 2209/225
. .
in the gas phase [2013‑01]
Collapse
C02F 2209/23
.
O3 [2013‑01]
C02F 2209/235
. .
in the gas phase [2013‑01]
Collapse
C02F 2209/24
.
CO2 [2013‑01]
C02F 2209/245
. .
in the gas phase [2013‑01]
Collapse
C02F 2209/26
.
H2S [2013‑01]
C02F 2209/265
. .
in the gas phase [2013‑01]
Collapse
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]
Collapse
C02F 2209/44
.
Time [2013‑01]
C02F 2209/445
. .
Filter life [2013‑01]
Collapse
General aspects of water treatment [2013‑01]
Collapse
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]
Collapse
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]
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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]
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C02F 2301/10
.
Temperature conditions for biological treatment [2013‑01]
C02F 2301/103
. .
Psychrophilic treatment [2013‑01]
C02F 2301/106
. .
Thermophilic treatment [2013‑01]
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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]
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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 micro-bubbles or nano-bubbles [2013‑01]
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Use of specific compounds during water treatment [2013‑01]
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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]
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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]
This page is owned by Office of Patent Classification.
Last Modified: 10/10/2013