Liquid purification or separation – Structural installation – Closed circulating system
Patent
1976-04-28
1978-01-10
Granger, Theodore A.
Liquid purification or separation
Structural installation
Closed circulating system
119 3, 210195R, 210336, E04H 320
Patent
active
040678091
ABSTRACT:
A filtering system is disclosed for effectively filtering the water of aquariums for tropical or salt-water fish, the water of fish-farming ponds, and/or any other type of fish-farming water. The system includes a filtration tank partitioned into a storage chamber, a filtration chamber, and a discharge chamber, and the fish-farming water is successively passed through the storage and filtration chambers so as to be purified, and is discharged along the water surface by means of a discharge mechanism within the discharge chamber. A lift pipe is provided at one end of the storage chamber, and filters and vacancies are alternately arranged in a parallel manner within the filtration chamber, with an open spaced defined thereabove. The water level of the filtration tank is maintained lower than the top of the filters, and the filter layers may be sets of two water-passing plates, such as, for example, multipore plates, net-type plates, or the like, with the filter medium, such as, for example, glass wool, sand, or the like, packed therebetween or attached thereto. The discharge chamber is equipped with a discharge pipe which has an opening directed along the surface of the water, and in this manner, the fish-farming water is prepurified in the storage chamber, further purified in the filtration chamber, and discharged along the water surface so as to be uniformly circulated in an installation for fish-farming. The water is constantly maintained in an aerobic state and an extremely high purification efficiency is obtained.
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