Animal husbandry – Entomological culture device – Egg treatment – production – or storage
Patent
1988-02-11
1990-08-28
Swiatek, Robert P.
Animal husbandry
Entomological culture device
Egg treatment, production, or storage
A01K 6300
Patent
active
049516060
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a fish tank for intensive fish fattening, which has a device for feeding air and/or oxygen to the fish water and which is preferably designed as a long tank, to a system consisting of several fish tanks and to a process for operating such a fish tank or such a system.
Intensive fish fattening in open waters has been known for a long time. Since the biological equilibrium of such open waters is disturbed to an ever-increasing extent by deposits of harmful substances and the breeding conditions therefore continually deteriorate, there has been a change to fish fattening in artificial ponds. However, these known systems have to be operated at a considerable outlay, especially in terms of the fresh water and area required, thus casting doubts on the economic viability of the fattening processes. Other considerable disadvantages of these known processes are to be seen in the constant alternation of the water temperature during daytime and nighttime operation and in the different seasons, the high risks presented by fish diseases and the dangers caused by environmental poisons introduced into the ponds.
The object on which the present invention is based is, therefore, to develop a fish tank for intensive fish fattening and a process for operating such a fish tank, which can be operated without the considerable risks of known processes and with high economic efficiency irrespective of the seasons and fluctuations in the weather.
According to the invention, in a fish tank of the type described in the introduction, this object is achieved by providing the long tank along its longitudinal center axis, with a depression in the form of a pit, in which is arranged a filler which reaches at least up to the water surface and through which the fish water flows, the filler having flow channels which extend preferably vertically from the lower region of the pit virtually up to the water surface and into which can be introduced in their lower end portion an air/water mixture which can be conveyed out into the fish water in their upper end portion. The special design of the fish tank with the pit in the longitudinal center axis of the tank and with the filler in this pit makes it possible to keep the fish water clean and enrich it with oxygen in an especially simple and economical way, so that two essential fundamental conditions for keeping the fish stock healthy are satisfied.
In a system consisting of several fish tanks according to the invention, there is provided a preceding holding tank for the fattened fish intended for sale, and following settling tanks, the fish tanks having nets or grids which are guided along the longitudinal extension of the latter and by means of which the fish in the fish tank can be sorted, so that the ready-fattened fish can be transferred into the holding tank.
The nets or grids have differing mesh widths or distances between the bars, so that the fish can be extracted while sorted according to size by means of the nets.
The nets are tensioned in frames which can be guided horizontally or vertically in rails set in the fish-tank wall and/or the fish-tank floor.
The settling tanks are preferably circular tanks which in their centers have a recess, from which the settled fish impurities and feed residues can be sucked off. Partitioned off in the peripheral region of the settling tanks is an annular chamber, into which the dirty fish water can be introduced preferably tangentially, and the clarified fish water can be sucked off from the remaining inner space of each settling tank which is relatively flow-free.
In a process for operating a fish tank or a system, the water in the fish tanks is maintained at a uniform temperature suitable for the type of fish, a continuous air stream is supplied through the inlet orifices to the flow channels in the fillers, so that the fish-water is dragged along according to the air lift effect by the air rising in the vertical flow channels and the water in the fish tanks is ventilated and circulated approximately 30 times per hour via t
REFERENCES:
patent: 3166043 (1965-11-01), Castillo
patent: 3716025 (1973-02-01), Lawson
patent: 3778976 (1973-12-01), Pond
patent: 3842804 (1974-10-01), Christensen et al.
patent: 3900004 (1975-08-01), Goldman et al.
patent: 3996893 (1976-12-01), Buss
patent: 4043299 (1977-08-01), Birkbeck et al.
patent: 4067809 (1978-01-01), Kato
patent: 4211183 (1980-07-01), Hoult
patent: 4212268 (1980-07-01), Chapman
patent: 4213421 (1980-07-01), Droese et al.
patent: 4370947 (1983-02-01), Hilken
patent: 4752388 (1988-06-01), Ng
Greenberg Laurence A.
Lerner Herbert L.
Lucchesi Nicholas D.
Metz Mannheim GmbH
Swiatek Robert P.
LandOfFree
Fish tank for intensive fish fattening and process for operating does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fish tank for intensive fish fattening and process for operating, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fish tank for intensive fish fattening and process for operating will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1582324