Liquid purification or separation – Structural installation – Closed circulating system
Patent
1994-05-18
1996-07-16
Drodge, Joseph W.
Liquid purification or separation
Structural installation
Closed circulating system
47104, 119260, 2104162, 210456, B01D 3501
Patent
active
055363989
ABSTRACT:
An algal filter that purifies and oxygenates aquarium water comprises an elongated box with an inlet and an outlet at opposing ends with supports along the interior of the bottom wall. Trays having a lattice construction rest on the supports. Algae grow on the trays when the trays are contacted by water. A flow of water along the box is induced by a pump. Baffles are situated above the trays in alternation with the supports to alternately direct the water upward and downward through the trays along the length of the filter to produce a turbulent flow of water that potentiates the growth and metabolic exchange capabilities of the algae. Slots in the baffles induce a side to side flow that further enhances turbulence. In addition, the lattice construction of the trays results in quiet areas among the turbulence which may be used as refugiums by plankton and other small organisms. Small organisms are further protected when exiting the filter by a ramp leading to the outlet that effectively smooth the previously turbulent water as it leaves the filter. A lid is placed atop the box and holds artificial lights that illuminate the algae growing on the trays.
REFERENCES:
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patent: 4966096 (1990-10-01), Adey
patent: 5054424 (1991-10-01), Sy
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