DD156766A1 - DEVICE FOR RESTORING FISH - Google Patents

Abstract

The invention relates to a device for growing fish and other aquatic animals in vertically durchroemten containers with intensive water use. The aim of the invention is to provide a device in which the production water is used by simple and compact installations in the breeding containers in the circulation with simultaneous oxygenation and purification. The preferably silo-shaped cultivation container receives a fitting piece placed on the bottom drainage opening with sieve device, to which a vertical central tube with a laterally directed lateral water drainage at the level of the water level and the foam discharge pipe located above it adjoins. In the lower part of the central tube air is injected, which generates an ascending water flow, which is enriched with oxygen and returned by the lateral Wasserabfuehrung in the container. This creates an enriched with water contaminants foam is dissipated. The invention can be used in fish farming facilities, especially in industriemaessig working plants.

Description

Title of the invention

Equipment for rearing fish

Field of application of the invention

The invention relates to a device for growing fish in vertically flowed containers, in which suitable internals with the addition of air or other gases, a repeated use of the water with simultaneous Säuerstoffanreicherung and removal of unwanted metabolic products ·

Characteristic of the known technical solutions In industrial rearing of fish and other aquatic animals, vertically flowing production units (silos) are superior to the conventional rectangular gutters and concreted ponds because they have a lower plate requirement as well as lower heat losses and self-cleaning with less water flow work. The increasing scarcity of energy, food protein and water has led to a large number of proposals in international literature, which usually result in producing the fish in silos, freeing the used water from undesired metabolic products (purification) and subsequently Reuse Oxygenate (preferably with pure oxygen) · A very cheap, yet effective, cleaning method is flotation of fish metabolites. All known solutions see separate facilities for

Fish keeping, water purification and ventilation before, wa; the production equipment is very expensive and also places high demands on operation and maintenance ·

Aim of the invention

The object of the invention is to provide a device for rearing fish and other aquatic animals, in which the water is used in the circulation with oxygen enrichment and water purification and all main plant parts are combined in a building structure to minimize the level of acidification and acidification in comparison to the rearing unit

Explanation of the essence of the invention

According to the invention a Fischzuchtsilo is used, which receives a central tube, in the lower end of air fine bubbles is distributed. The central tube has a branch, which preferably points obliquely downwards over the water level, with a device for reducing its cross-section and terminates in a preferably U-shaped foam discharge tube (FIG. 1). At the lower end of the central tube, there is an approach against the ingress of fish secured ZufluiTdffnung, which is preferably designed as a plate screen and a tight fitting fit into the silo drain.

This solution offers the following advantages: Due to the fine-bubble introduction of air into the central tube, the accumulation of acid in the water and, due to the mammoth pump effect, the rise of the water level in the ear of the centrair »Since the water is contaminated with metabolic products, a strong foaming also occurs. By opening the closure member in the lateral branch water can flow, and thus creates a water cycle. The foam, in which the metabolic products accumulate, rises upward and is discharged through the U-shaped tube. As a result, there is a constant dilution of production-impairing metabolites in the breeding facility. It can be used with less freshness

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water consumption can be produced than is possible in the already known system of the open circuit.

The main advantages of the proposed device are the compact design and the minimum technical effort for the removal of metabolites.

Ausführungsbeispielr

Fig. 1 shows how the proposed device can be designed. Trained as a silo unit 1 has a fresh water inlet 2 and a drain opening 3 for the discharge and discharge of non-skimmed excess water. In the drain opening 3 sits a fitting with shut-off grid 4, which may be formed, for example, as a plate screen. This is followed upwards by a riser pipe 5, at the upper end of which the obliquely downwardly directed branch 6 with the storage device 7 for the reintroduction of the water enriched with oxygen and the curved foam discharge pipe 8 are located. In. the lower end of the riser 5 is introduced through the air duct 9 and the diffuser 1 of compressed air, which generates an ascending water flow which enriches water with oxygen and at the same time causes it to foam.

Claims (2)

claims: 1 »means for rearing τοπ fish, characterized in that in a preferably round rearing tank on a drain located at the bottom of a riser with a at the upper end preferably above the water level and directed obliquely down to the container edge Wasserabfüh- stungs with throttle and a above Schaumabftihrungsrohr is arranged, wherein in the lower end of the riser means for preferably fine bubble entry of air is located. 2. Device according to item 1, characterized in that for the production of the water-air mixture in the riser, the kinetic energy of flowing water is used · For this 1 page drawings