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 G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes)
Introduced: January 1980
Description
Covers chemical and physical processes for purifying, conditioning, or processing water, waste water, sewage, and sludge streams. Includes desalination, softening, disinfection, removal of suspended solids and dissolved contaminants, odor control, and sludge dewatering or disposal methods. This subclass encompasses treatment technologies such as coagulation, filtration, ion exchange, biological treatment, and oxidation processes applied across municipal, industrial, and agricultural applications.
Title
Titles differ between systems:
IPC: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
CPC: 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 G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes)
Full Title
Full titles differ between systems:
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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 G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes)
Of 17 combined children, 6 exist in both systems.
9 codes are CPC-only extensions, 2 exist only in IPC.
Note: 9 CPC extensions are marked as secondary classification only.
2 shared codes have differing titles between IPC and CPC.
Child Classifications
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- C02F 1/00 Treatment of water, waste water, or sewage (C02F3/00 - C02F9/00 take precedence) since 1980 +5 CPC IPC+CPC Available in IPC and CPC
- C02F 103/00 Nature of the water, waste water, sewage or sludge to be treated since 2000 −16 IPC IPC only IPC only
- C02F 2103/00 Nature of the water, waste water, sewage or sludge to be treated 2nd only +23 CPC CPC only CPC only
- C02F 2201/00 Apparatus for treatment of water, waste water or sewage 2nd only +8 CPC CPC only CPC only
- C02F 2203/00 Apparatus and plants for the biological treatment of water, waste water or sewage 2nd only +4 CPC CPC only CPC only
- C02F 2209/00 Controlling or monitoring parameters in water treatment 2nd only +36 CPC CPC only CPC only
- C02F 2307/00 Location of water treatment or water treatment device 2nd only +7 CPC CPC only CPC only
- C02F 3/00 Biological treatment of water, waste water, or sewage since 1980 +4 CPC IPC+CPC Available in IPC and CPC
- C02F 5/00 Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents (softening using ion-exchange C02F1/42) since 1980 IPC+CPC Available in IPC and CPC
- C02F 9/00 Multistage treatment of water, waste water or sewage since 1980 IPC+CPC Available in IPC and CPC