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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3/00
Biological treatment of water, waste water, or sewage
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C02F3/12
Activated sludge processes
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C02F3/1236
Particular type of activated sludge installations
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C02F3/1242
Small compact installations for use in homes, apartment blocks, hotels or the like
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C02F3/1247
comprising circular tanks with elements, e.g. decanters, aeration basins, in the form of segments, crowns or sectors
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