Activated sludge processes

Introduced: January 1980

Full Title

Biological treatment of water, waste water, or sewage > Aerobic processes > Activated sludge processes

Of 8 combined children, 5 exist in both systems.

3 codes are CPC-only extensions.

IPC defines codes here since 1980.

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C02F 3/1205 +5 CPC CPC only CPC only
C02F 3/1236 +5 CPC CPC only CPC only
C02F 3/1278 +3 CPC CPC only CPC only
C02F 3/14 using surface aeration since 1980 +1 CPC IPC+CPC Available in IPC and CPC
C02F 3/20 using diffusers since 1980 +5 CPC IPC+CPC Available in IPC and CPC
C02F 3/22 using circulation pipes since 1980 +2 CPC IPC+CPC Available in IPC and CPC
C02F 3/24 using free-fall aeration or spraying since 1980 IPC+CPC Available in IPC and CPC
C02F 3/26 using pure oxygen or oxygen-rich gas since 1980 IPC+CPC Available in IPC and CPC