FI (Note)/(Index) list

Descriptions for C02F9/00 and notes/indexes are displayed on this screen.

C02F9/00 Multistage treatment of water, waste water or
sewage [3, 2006.01, 2023.01]

Note(s)
    This group covers combined treatment operations, carried out in a defined order in three or more different treatment stages, each stage occurring in a separate location, e.g. apparatus, reactor or compartment.[3,7,8]This group does not cover treatments where the essential characteristic resides in an individual step of the treatment, which treatments are covered by groups C02F 1/00-C02F 7/00.