Patent classifications
C
CHEMISTRY; METALLURGY
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C02
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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C02F
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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1/00
Treatment of water, waste water, or sewage
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C02F1/52
by flocculation or precipitation of suspended impurities
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C02F1/5236
using inorganic agents
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C02F1/5245
using basic salts, e.g. of aluminium and iron
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