Fluidized bed biological filter system for fish tanks

Details Fluidized bed biological filter system for fish tanks Fluidized bed biological filter system for fish tanks

1994-07-29

1995-09-26

Hruskoci, Peter A.

Liquid purification or separation

Structural installation

Closed circulating system

210150, 210264, 210285, 2104162, A01K 6304, C02F 310

Patent

active

054531837

ABSTRACT:
A fluidized bed biological filter system for fish tanks having a primary container structure for receiving particulate material and a secondary container structure for receiving contaminated water from a fish tank. The front and rear walls of the primary container structure converge downwardly toward each other to form an acute angle. The rear wall of the primary container structure incorporates a manifold having an inlet port at its top end and an outlet port adjacent the bottom of the primary container structure. The outlet end of the manifold is linear in shape and extends between the laterally spaced side walls of the primary container structure. Particulate material having a specific gravity greater than water is placed in the bottom of the primary container structure. The contaminated water from a fish tank is first pumped into the secondary container structure and a pump therein pumps the contaminated water into the inlet port of the manifold. The contaminated water travels downwardly through the manifold and exits the outlet port causing the particulate material to be driven upwardly in the primary container structure and it remains in a constant state of suspension as long as the pump is operating. The contaminated water passing through the particulate media functions to convert the primary metabolite of fish into the less toxic form of nitrogen and the filtered water is returned to the fish tank.

REFERENCES:
patent: 1192569 (1922-02-01), Crosby
patent: 1407936 (1916-07-01), Schilling
patent: 3892663 (1975-07-01), Wiedenmann
patent: 4043936 (1977-08-01), Francis et al.
patent: 4861472 (1989-08-01), Weis
patent: 5096814 (1992-03-01), Alvasidis et al.
patent: 5172650 (1992-12-01), Hsu et al.
patent: 5306421 (1994-04-01), Weinstein

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