BIOLOGICAL CONTACTOR FOR PURIFYING WATER TO PRODUCE DRINKING WATER

BIOLOGICAL CONTACTOR FOR PURIFYING WATER TO PRODUCE DRINKING WATER

The biological filter (8) comprises a granular bed including a layer (17) based on active carbon in which the material satisfies the following conditions: - density of between 0.18 and 0.32 g/cm , - carbon tetrachloride adsorption capacity of between 60% and 120% bypweight, - carbon tetrachloride re...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: BABLON, GUY P, MONTAGNON, JEAN R, VENTRESQUE, CLAIRE C, DAGOIS, GERARD L
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
METALLURGY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:The biological filter (8) comprises a granular bed including a layer (17) based on active carbon in which the material satisfies the following conditions: - density of between 0.18 and 0.32 g/cm , - carbon tetrachloride adsorption capacity of between 60% and 120% bypweight, - carbon tetrachloride retention lower than 25% by weight of the adsorbed mass of carbon tetrachloride, - methylene blue: between 5 and 30 ml, - particle size range: between 0.5 and 1.5 mm of effective size with a uniformity coefficient lower than 2. A washing cycle (21, 24) (air alone; air + water; water alone) of this filter is triggered (38) when a value (36, 37) which is representative of the algal population of this layer reaches a predetermined set threshold.