Liquid purification or separation – Processes – Treatment by living organism
Patent
1994-06-23
1996-12-10
Drodge, Joseph W.
Liquid purification or separation
Processes
Treatment by living organism
210151, 2101951, 210219, 210617, 210622, 210903, C02F 330
Patent
active
055827330
ABSTRACT:
To purify untreated water, for example waste water, containing organic pollution, materials in suspension and nitrogen-containing pollution, reagents are added under conditions adapted to coagulate all of the materials in suspension, including colloidal materials, to form granular physical/chemical floc. Diluting water is added, preferably after the reagents, in a flowrate ratio of at least 2/1. The dilute flocculated water is caused to flow through a bed of sludge in the form of such dense and granular floc and denitrifying bacteria. The bed is subject to turbulent but intermittent agitation. A denitrified effluent is recovered. This denitrified effluent is caused to flow through a biological filter or preferably through a fluidized bed containing nitrifying bacteria and into which oxygen or air is injected. A clarified effluent is obtained, some of which is recycled as the diluting water.
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Water Research, vol. 13, Apr. 1979, pp. 1009-1015, A. Klapwijk et al.
Desbos Gilbert
Rey Philippe
Rogalla Frank
Drodge Joseph W.
Meehan Thomas A.
Omnium De Traitements et de Valorisation
VanOphem John
VanOphem Remy J.
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