IPC Subgroup
C02F 3/1 Packings; Fillings; Grids
Introduced: January 1980
Last revised: January 2023
Full Title
Biological treatment of water, waste water, or sewage > Aerobic processes > Packings; Fillings; Grids
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- Subclass:
- TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE