(0)C02F:0/1:
IPC6
SECTION C - CHEMISTRY; METALLURGY
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
C02F
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C 02

 TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (settling tanks, filtering, e.g. sand filters or screening devices, B 01 D)

C 02 F

 TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B 01 D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B 63 J; adding materials to water to prevent corrosion C 23 F; treating radioactively-contaminated liquids G 21 F 9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes) [3]
 

Note
 

Processes using enzymes or micro-organisms classified in this subclass are not further classified in subclass C 12 S. [5]

 

 

 
 

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/ 00 Treatment of water, waste water, or sewage (C 02 F 3/00 to C 02 F 9/00 take precedence) [3]

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/ 02 • by heating (methods of steam generation F 22 B; preheating boiler feed-water or accumulating preheated boiler feed-water F 22 D) [3]  

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/ 04 • • by distillation or evaporation [3]  

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/ 06 • • • Flash evaporation [3]  

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/ 08 • • • Thin film evaporation [3]  

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/ 10 • • • by direct contact with a particulate solid or with a fluid, as a heat transfer medium [3]  

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/ 12 • • • • Spray evaporation [3]  

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/ 14 • • • using solar energy [3]  

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/ 16 • • • using waste heat from other processes [3]  

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/ 18 • • • Transportable devices to obtain potable water [3]  

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/ 20 • by degassing, i.e. liberation of dissolved gases (degasification of liquids in general B 01 D 19/00; arrangement of degassing apparatus in boiler feed supply F 22 D) [3]  

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/ 22 • by freezing [3]  

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/ 24 • by flotation (C 02 F 1/465 takes precedence) [3,5]  

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/ 26 • by extraction [3]  

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/ 28 • by sorption (using ion-exchange C 02 F 1/42; sorbent compositions B 01 J) [3]  

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/ 30 • by irradiation [3]  

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/ 32 • • with ultra-violet light [3]  

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/ 34 • with mechanical oscillations [3]  

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/ 36 • • ultrasonic vibrations [3]  

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/ 38 • by centrifugal separation [3]  

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/ 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 E 02 B 15/04; devices in sewers for separating liquid or solid substances from sewage E 03 F 5/14, e.g. for use in drains leading to the sewer E 03 F 5/16) [3,5]  

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/ 42 • by ion-exchange (ion-exchange in general B 01 J) [3]  

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/ 44 • by dialysis, osmosis or reverse osmosis [3]  

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/ 46 • by electrochemical methods [3,5]  

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/ 461 • • by electrolysis [5]  

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/ 463 • • • by electrocoagulation [5]  

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/ 465 • • • by electroflotation [5]  

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/ 467 • • • by electrochemical disinfection [5]  

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/ 469 • • by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis [5]  

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/ 48 • with magnetic or electric fields (C 02 F 1/46 takes precedence) [3]  

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/ 50 • by addition or application of a germicide or by oligodynamic treatment (C 02 F 1/467 takes precedence) [3,5]  

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/ 52 • by flocculation or precipitation of suspended impurities [3]  

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/ 54 • • using organic material [3]  

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/ 56 • • • Macromolecular compounds [3]  

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/ 58 • by removing specified dissolved compounds (using ion-exchange C 02 F 1/42; softening water C 02 F 5/00) [3]  

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/ 60 • • Silicon compounds [3]  

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/ 62 • • Heavy metal compounds [3]  

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/ 64 • • • of iron or manganese [3]  

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/ 66 • by neutralisation; pH adjustment (for degassing C 02 F 1/20 ; using ion-exchange C 02 F 1/42; for flocculation or precipitation of suspended impurities C 02 F 1/52; for removing dissolved compounds C 02 F 1/58) [3]  

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/ 68 • by addition of specified substances, e.g. trace elements, for ameliorating potable water (medicinal water A 61 K) [3]  

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/ 70 • by reduction [3]  

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/ 72 • by oxidation [3]  

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/ 74 • • with air (aeration of stretches of water C 02 F 7/00) [3]  

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/ 76 • • with halogens or compounds of halogens [3]  

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/ 78 • • with ozone [3]  
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