CPC Main Group
C02F 1/00 Treatment of water, waste water, or sewage (C02F3/00 - C02F9/00 take precedence)
26 direct subcodes
Child Classifications
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- C02F 1/02 by heating (methods of steam generation F22B; preheating boiler feed-water or accumulating preheated boiler feed-water F22D)
- C02F 1/20 by degassing, i.e. liberation of dissolved gases (degasification of liquids in general B01D19/00; arrangement of degassing apparatus in boiler feed supply F22D)
- C02F 1/22 by freezing
- C02F 1/24 by flotation (C02F1/465 takes precedence)
- C02F 1/26 by extraction
- C02F 1/28 by sorption (using ion-exchange C02F1/42; sorbent compositions B01J)
- C02F 1/30 by irradiation
- C02F 1/34 with mechanical oscillations
- C02F 1/38 by centrifugal separation
- C02F 1/40 Devices for separating or removing fatty or oily substances or similar floating material (cleaning or keeping clear the surface of open water from oil or like materials E02B15/04; devices in sewers for separating liquid or solid substances from sewage E03F5/14, e.g. for use in drains leading to the sewer E03F5/16)
- C02F 1/42 by ion-exchange (ion-exchange in general B01J)
- C02F 1/44 by dialysis, osmosis or reverse osmosis
- C02F 1/46 by electrochemical methods
- C02F 1/48 with magnetic or electric fields (C02F1/46 takes precedence)
- C02F 1/50 by addition or application of a germicide or by oligodynamic treatment
- C02F 1/52 by flocculation or precipitation of suspended impurities