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| SECTION C– CHEMISTRY; METALLURGY |
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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) |
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| 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) |
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