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PCE
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IPC Main Group
C02F 3/00

Biological treatment of water, waste water, or sewage

Introduced: January 1980

Last revised: January 2023

Classification Context

Section:
CHEMISTRY; METALLURGY
Class:
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Subclass:
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

Related Keywords

purifying SEWAGE biologically

5 direct subcodes

Child Classifications

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  • C02F 3/28 Anaerobic digestion processes
  • C02F 3/3 Aerobic and anaerobic processes
  • C02F 3/32 characterised by the animals or plants used, e.g. algae
  • C02F 3/34 characterised by the microorganisms used