RO132898A2 - Incubation installation for reproduction of sturgeons bred in recycled water systems, even in the off season - Google Patents

Abstract

The invention relates to an incubation installation, of recycling aquacultural system type, meant for reproduction of sturgeons in recycled water system, also in the off season, with the role of providing sturgeon juveniles during the entire year. According to the invention, the installation consists of an incubator range (1) with 16 incubation vessels (2), a tank (3) for the reproducers and for alevins, respectively, divided into two compartments (A and B), separated by a detachable wall (4) provided with a grate (5), a multi-functional tank (6) having three compartments (C, D and E), the first compartment (C) where the solid impurities are decanted and wherefrom they are periodically discharged through a pipe (13) communicating with the second compartment (D) through an opening (14) covered with a grate (15) in the upper side of a separating panel (16) and through a lower opening (17) of a separating panel (18), the second compartment (D) with the role of biological filter, having two grates (22), a lower one and an upper one, between which a filtering element (9) is enclosed, the second and the third compartments (D and E) communicating through an opening (19) covered with a grate (20) in the upper side of a panel (21), as well as a plant (7) for sterilizing water with ultraviolet rays and a plant (8) for thermal conditioning of water.

Description

INCUBATION INSTALLATION FOR THE REPRODUCTION AND OUT OF SEASON OF GROWING STURKEYS IN RECIRCULATED WATER SYSTEMS

The invention relates to an incubation plant of the recirculating aquaculture system (SAR) type intended for the reproduction and in the off-season of sturgeons raised in systems with recirculated water which has the role of providing sturgeon seedlings throughout the year.

A wide range of constructive solutions and ways of operating fish incubation facilities are known worldwide. Due to the increasing dynamics of the share of products obtained from aquaculture and the need to permanently improve their quality, there was a need to intensify research in the field, which aims to obtain innovative results with direct applicability in aquaculture.

In the European Union, the technical and technological level of equipment for the artificial reproduction of fish in recirculating aquaculture systems offered by producers is constantly adapted to market requirements and existing European regulations. As a result, solutions have appeared that solve technical problems related to process automation, component reliability, quiet operation, etc.

Among the foreign manufacturers of such technical equipment we can mention prestigious companies such as: Aquaculture, Kronawitter, and Fiap - Germany, Akva Group - Norway, UltraAqua - Denmark, Ozonia - Switzerland, AquaTech - Austria, Emperor Aquatics - USA, Deep Blue - Africa from the South etc.

If the problems raised by the practice of intensive aquaculture worldwide are largely similar, it can be noted that their solution is approached in a somewhat different way, depending on the geographical area, experience and tradition in the field, partnerships formed during time and other conjunctural factors.

Other types of incubators equipped with different incubation vessels are also known: Zuger type incubation vessels - MC-III; McDonald-type incubation vessels - MC-I; Safeguard Up-Welling incubators; Deep Blue incubators. Incubators are only one component of incubation facilities for breeding fish raised in SAR.

If in all situations the problems of water supply / evacuation, ensuring the optimal parameters of the water and the environment through heating / cooling, treatment, aeration, degassing and oxygenation, etc. of water can be solved by applying different technologies, it is up to the beneficiary and the designer of the installation to choose the most suitable for each concrete situation, based on economic, technical, environmental protection criteria, etc.

The construction of an incubation plant for the breeding and off-season of sturgeon farmed in the SAR must meet a number of requirements, such as:

- to ensure physico-chemical parameters of the technological water which, after recirculation, must correspond to the physiological requirements of the crop species;

- to ensure an optimal temperature necessary for the reproduction of the crop species;

- the creation of conditions similar to those in the natural environment for breeders and fertilized eggs;

- incubation rooms must always be separated from the rooms for rearing young and raising fish for consumption;

- the length of the water recirculation system should be reduced to a minimum, pools as compact as possible and pumping heights as small as possible;

- operate with low energy consumption;

- have low maintenance requirements;

- occupy as little space as possible;

- to be fully automated, to be able to be monitored, in order to function correctly;

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Nr. JW

Filing date of 2017 00319 25/05/2017

- to be useful, the sturgeon incubation facility to achieve all the established functional objectives;

- the manufacturing and commissioning price is as low as possible.

There is virtually no incubation facility for breeding and off-season sturgeon raised in SAR that would ideally meet all the requirements listed above, so efforts are being made in the field to reduce the effects of their lesser characteristics. Thus, it is known that incubation facilities for the off-season reproduction of fish raised in SAR, in addition to the many advantages they have over other types, have a major problem, that they are energy-consuming, the height of the water supply is higher than minimum required leads to a high consumption of pumping energy, specialized tanks for a single function, difficult to maintain, cleaning the compartments being difficult.

The current incubation facilities for breeding and off-season of sturgeon farmed in SAR have the following disadvantages:

- the capacities of all the component equipment of the system are not correlated;

- each piece of equipment, especially the pools, has a single technological function, thus increasing the route of water recirculation in the system and the inefficient use of space;

- in general, biological filters are placed above the fish ponds, resulting in a difference of a few meters for pumping water to above the biological filters. Due to the operation of the plant for 24 hours a day, large volumes of recirculated water, high pumping heights and long routes of water recirculation in the system, this leads to increased energy consumption.

The technical problems solved by the invention consist in the realization of an incubation installation for the reproduction and in the off-season of sturgeons raised in recirculated water systems which has the role of ensuring sturgeon puppies throughout the year by reproducing sturgeons not only in season, with implications resulting from this.

The installation which is the subject of the invention is of the recirculating aquaculture system (SAR) type in which the photothermal conditions necessary to stimulate the maturation of the sturgeon sexual products are achieved at any time of the year, which creates an original way to increase sturgeon production. in particular, valuable fish species, in conditions of efficient use of space and improvement of economic and productive results.

Raising fish in intensive recirculating aquaculture system involves taking many risks due to the need to maintain water quality at the optimal parameters indicated for the growth of each fish species, in conditions of high density of fish material in small volumes of water. If the system, for various reasons, does not meet these parameters, the water quality degrades very quickly, and the fish can get sick and die.

The incubation plant for breeding and off-season of sturgeons raised in proposed recirculated water systems eliminates the above disadvantages in that:

- the capacities of all the component equipment of the system are correlated with the proposed capacity of the incubation installation;

- the pools provided in the installation have several technological functions;

- the low pumping height and the water recirculation circuit shortened to a minimum lead to a minimum electricity consumption;

- in farms where sturgeons are raised indoors in recirculated water systems, it will be possible to apply a better technological management, capitalizing on production capacities;

- create an original way to increase sturgeon production through better use of hatcheries, breeding herds and human resources.

of 2017 00319 25/05/2017 The following is an example of an incubation plant for the breeding and off-season of sturgeons raised in recirculated water systems in connection with Figures 1, 2, 3, 4 and 5 which represent :

Fig. 1 - Incubation plant for breeding and off-season of sturgeons reared in systems with recirculated water - ensemble

Fig. 2 - Incubation plant for the reproduction and in the off-season of sturgeons raised in systems with recirculated water - detail of multifunctional basin

Fig. 3 - Incubation plant for sturgeon reproduction - three-dimensional image

Fig. 4 - Pool for breeders, respectively for fry - three-dimensional image

Fig. 5 - Multifunctional pool - three-dimensional image

The plant for the reproduction of sturgeons in recirculating aquaculture systems according to the invention consists of an incubator battery (1) with 16 incubation vessels (2) type McDonald, a pool for breeders and fry (3), divided into two compartments (A ) and (B) separated by a removable wall (4) provided with a grate (5), a multifunctional basin (6) divided into three compartments (C), (D) and (E), a water sterilization installation with ultraviolet radiation (7) and a water conditioning system (8). The compartment (D) with the role of biological filter of the multifunctional basin (6) contains a filter element (9) on which the nitrifying bacteria grow on the entire contact surface in the form of a biological film and an air diffuser (10), the compartment (E) ) contains the recirculation pumps (11) and the level sensors (12) which transmit the information to the automation system.

in the multifunctional basin (6) the compartment (C) takes the wastewater from the basin (3) and decants the solid impurities that are periodically discharged through the pipe (13).

Compartments (C) and (D) communicate with each other through an opening (14) covered with a grid (15) at the top of a partition panel (16) and through a lower opening (17) of a partition panel (18). ) and the compartments (D) and (E) communicate through an opening (19) covered with a grate (20) at the top of a panel (21). in compartment (D) there are two grates (22), one lower and one upper, between which the filter element (9) is closed.

in the first phase of reproduction, in pool 3 for breeders / fry, the breeders are kept separate in the two compartments A and B during the photothermal treatment in order to reach the maturity of the sexual products. The wastewater from basin 3 is transferred to compartment C of the multifunctional basin 6 where the settling of solid impurities that are periodically discharged through the pipe 13. From compartment C the water passes through the upper opening 14 covered with the grate 15 of the panel 16, descends between the panels 16 and 18, then passes through the lower opening 17 in compartment D. in compartment D the hydrogen peroxide through the air diffuser 10, rises and passes through the filter element 9 closed between the two grids 22 and then passes through the upper opening 19 covered with the grill 20 of the panel 21 in compartment E. in compartment E where the recirculation pumps 11 are mounted, the water is maintained at a constant level by the automation system and the level 12 sensors by the addition of fresh water from the network. By pumping the water is transferred through the water sterilization plant with ultraviolet radiation 7 and the water conditioning plant 8 in the basin 3 with breeders.

in the second phase of reproduction after the removal of the removable wall 4 in the basin 3 the sturgeon larvae are transferred through a pipe, after incubation, from the incubator battery 1 with the 16 incubation vessels 2. From the basin 3 with the sturgeon larvae, the water has the same route as in the first phase to the water cooler 8 from where it is transferred to the incubator 1 and then again to the basin 3.

Claims (2)

1. Incubation plant for the breeding and off-season of sturgeons raised in systems with recirculated water consisting of a battery of incubators 1 with 16 incubation vessels 2 type McDonald's, a pool for breeders and fry 3, respectively divided into two compartments A and B separated by a removable wall 4 provided with a grate 5, from a multifunctional basin 6 divided into three compartments C, D and E, compartment C, in which the solid impurities which are periodically discharged through the pipe 13 are decanted, communicates with compartment D through an opening 14 covered with a grid 15 at the top of a partition panel 16 and through a lower opening 17 of a partition panel 18, compartment D acting as a biological filter has two grids 22, one lower and an upper one, between which a filter element 9 is closed, the compartments D and E communicate through an opening 19 covered with a grid 20 at the top of a panel 21, a ultraviolet water sterilization plant 7 and a water conditioning plant 8, characterized in that a removable wall 4 with a grate 5 is installed in the spawning and spawning pool 3, creating the possibility of using a single pool for two purposes, in the first phase for parking the breeders during the photothermal treatment, and in the second phase, by removing the partition wall, for collecting the sturgeon larvae, after incubation. Incubation plant for the reproduction and off-season of sturgeons raised in systems with recirculated water according to claim 1, characterized in that the multifunctional basin 6 is divided into three compartments C, D and E, in compartment C the waste water from the system is taken and decant the solid impurities that will be periodically discharged through the pipe 13, compartment D acts as a biological filter of the multifunctional basin 6 and contains a filter element 9 on which nitrifying bacteria grow on the entire contact surface in the form of a biological film, filter element 9 being closed between two grids'22, one lower and one upper, compartment E contains recirculation pumps 11 and level 12 sensors which through the automation system maintain a constant water level in the system, compartments C and D communicate with each other through a opening 14 covered with a grate 15 at the top of a partition panel 16 and through an opening the lower part 17 of a partition panel 18, and the compartments D and E communicate through an opening 19 covered with a grid 20 at the top of a panel 21.