Long-acting oxygen producer for aquaculture water as well as preparation method and application of long-acting oxygen producer

Abstract

The invention provides a long-acting oxygen producer for aquaculture water and a preparation method and application thereof, and belongs to the technical field of aquaculture, the long-acting oxygen producer comprises the following components by weight: 5-20 parts of sodium percarbonate, 65-85 parts of sodium perborate, 5-15 parts of sodium tetraborate pentahydrate, 0.5-2 parts of polyethylene glycol, and 0.2-0.5 part of magnesium stearate. Sodium perborate is rapidly dissolved to release oxygen to achieve a quick-acting oxygenation effect, the solubility of sodium tetraborate pentahydrate is higher than that of sodium perborate, sodium tetraborate pentahydrate is rapidly dissolved in water and hydrolyzed to form boric acid with a certain concentration, the dissolution and hydrolysis processes of sodium perborate are inhibited to a certain extent, and the oxygen release speed of sodium perborate is delayed. The oxygen release time and the use effect of the oxygen producer are greatly improved, the oxygen release time is prolonged to 16-36 hours, the oxygen producer does not need to be added again by workers at night, the breeding cost is reduced, the stability and sustainability of a breeding system are improved, and the economic benefits of the breeding industry are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of aquaculture, and in particular relates to a long-acting oxygenator for aquaculture water and a preparation method and application thereof. Background Art

[0002] Under the extremely high temperature conditions in summer, the dissolved oxygen content in aquaculture water decreases, the microorganisms at the bottom of the water grow and reproduce actively, the oxygen consumption increases, and the problem of hypoxia and pond turnover is very likely to occur, especially at night, when pond inspections become more difficult. Stable and long-lasting oxygenators can release oxygen in the water and maintain the effect for a long time. They can not only prevent fish from suffocating and dying due to lack of oxygen, but also reduce frequent manual operations, improve the stability and sustainability of the aquaculture system, reduce the operating costs of aquaculture, and improve the economic benefits of the aquaculture industry.

[0003] At present, the chemical oxygenators commonly used in aquaculture are mainly sodium percarbonate, percarbonate and calcium peroxide. The oxygen release time of sodium percarbonate and percarbonate is generally between 0.5-2 hours, and those with slow release technology can only last for 5-8 hours; while calcium peroxide has a small oxygen release and is too slow to cope with acute hypoxia; chemical oxygenators in the prior art are generally divided into three types: the first is a fast-acting oxygenator, which can be used for emergency hypoxia, and the duration is generally between 0.5-4 hours, and a few can reach 5-8 hours, which cannot ensure that the pond is not hypoxic overnight, and workers need to patrol the pond frequently; the second is a long-acting oxygenator, which is mainly calcium peroxide products, with an oxygen release time of 48-72 hours, but a small amount of oxygen release, and can only be used to prevent hypoxia; the third is an oxygenation auxiliary agent, which is a surfactant, a water treatment agent, an organic acid, a fungus, etc., which can assist in efficiency, but it is difficult to directly solve the hypoxia caused by extreme weather. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a long-acting oxygenator for aquaculture water, and a preparation method and application thereof, which utilizes the different solubilities of sodium perborate (NaBO3·4H2O) and sodium tetraborate pentahydrate (Na2B4O7·5H2O), and sodium tetraborate pentahydrate can inhibit the hydrolysis reaction of sodium perborate to further extend the oxygen release rate of sodium perborate. It can not only be used for emergency treatment of hypoxia, but also can continuously release oxygen for 16-36 hours, and workers do not need to add oxygenator again at night, thereby improving the stability and sustainability of the aquaculture system.

[0005] To achieve the above object, the present invention first provides a long-acting oxygenator for aquaculture water, comprising sodium percarbonate, sodium perborate, sodium tetraborate pentahydrate polyethylene glycol and magnesium stearate.

[0006] Preferably, the weight components of the sodium percarbonate, sodium perborate, sodium tetraborate pentahydrate polyethylene glycol and magnesium stearate are 5-20 parts, 65-85 parts, 5-15 parts, 0.5-2 parts and 0.2 parts to 0.5 parts respectively.

[0007] Based on a general inventive concept, the present invention also provides a method for preparing a long-acting oxygenator for aquaculture water, comprising the following steps:

[0008] S1, taking sodium percarbonate, sodium perborate, sodium tetraborate pentahydrate, polyethylene glycol and magnesium stearate, putting them into a two-dimensional mixer in proportion, and mixing them evenly to obtain a mixed material;

[0009] S2. The mixed material obtained in S1 is sieved and tabletted to obtain a granular long-acting oxygenator.

[0010] Preferably, the pore size of the sieving in step S2 is 40 mesh.

[0011] Based on a general inventive concept, the present invention also provides an application of a long-acting oxygenator for aquaculture water in long-acting oxygenation of aquaculture water.

[0012] Preferably, the amount of the long-acting oxygenator added to the aquaculture water is 5 kg / mu.

[0013] The working mechanism of the long-acting oxygenator in this scheme is as follows:

[0014] Sodium percarbonate mainly acts on the oxygen-enhancing tablets to release oxygen quickly in the initial stage. After being put into the water body, sodium percarbonate quickly dissolves and releases oxygen, achieving the effect of rapid oxygen increase. It is used for emergency treatment of hypoxia in aquaculture water. Sodium perborate mainly acts on the oxygen-enhancing tablets to release oxygen slowly and steadily in the middle and late stages of oxygen release, hydrolyzing and releasing oxygen to maintain dissolved oxygen in aquaculture water. Sodium perborate is slightly soluble in water, and its aqueous solution can easily release active oxygen. The by-product sodium metasilicate is further decomposed into boric acid, which has the effect of disinfection and sterilization, inhibiting the growth of microorganisms at the bottom of the pond and improving the bottom environment of the aquaculture water.

[0015] The solubility of sodium tetraborate pentahydrate is higher than that of sodium perborate. It dissolves quickly in water and hydrolyzes to form a certain concentration of boric acid, inhibiting the hydrolysis reaction of sodium perborate, controlling the rate at which sodium perborate releases oxygen, and inhibiting the water absorption and expansion of sodium perborate, which causes the disintegration of oxygen-enhancing particles. It can also be used as a stabilizer for sodium perborate to maintain the stability of sodium perborate in oxygenators, effectively inhibit the dissolution and hydrolysis process of sodium perborate, and delay the rate of oxygen release from sodium perborate, greatly improving the oxygen release time and use effect of the oxygenator, and extending the oxygen release time to 16-36 hours.

[0016] Among them, the reaction formula of sodium perborate hydrolysis is: 2NaBO3·4H2O→NaBO2+O2↑+3H2O;

[0017] The reaction formula for the hydrolysis of sodium tetraborate pentahydrate is: B4O7 2- +5H2O=2H3BO3+2H2BO3 - Borax dissolves in water to form equal amounts of conjugate acid (H3BO3) and conjugate base (H2BO3 - ), forming a buffer solution.

[0018] Polyethylene glycol is used as a binder during the granulation of the oxygenator, and magnesium stearate is used as a release agent during the granulation of the oxygenator.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) This scheme uses a composite oxygenation formula, a fast-acting oxygenation component sodium percarbonate and a slow-release oxygenation component (sodium perborate and sodium tetraborate pentahydrate), which can not only be used for emergency treatment of hypoxia, but also can continuously release oxygen for 16-36 hours. Workers do not need to add oxygen again at night, which reduces breeding costs, improves the stability and sustainability of the breeding system, and improves the economic benefits of the breeding industry.

[0021] (2) The different solubilities of sodium perborate and sodium tetraborate pentahydrate, as well as the ability of sodium tetraborate pentahydrate to inhibit the hydrolysis reaction of sodium perborate, are utilized to further extend the oxygen release rate of sodium perborate. DETAILED DESCRIPTION

[0023] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention. Without departing from the spirit and substance of the present invention, modifications or substitutions made to the methods, steps or conditions of the present invention are within the scope of the present invention.

[0024] Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art; unless otherwise specified, the reagents used in the examples are commercially available.

[0025] Example 1

[0026] Preparation of long-acting oxygenator for aquaculture water

[0027] S1, 20 parts of sodium percarbonate, 65 parts of sodium perborate, 13 parts of sodium tetraborate pentahydrate, 1.8 parts of polyethylene glycol, and 0.2 parts of magnesium stearate were put into a two-dimensional mixer and mixed uniformly to obtain a mixed material.

[0028] S2. The mixture is passed through a 40-mesh sieve and tabletted to obtain a granular long-acting oxygenator.

[0029] Example 2

[0030] Preparation of long-acting oxygenator for aquaculture water

[0031] S1, 20 parts of sodium percarbonate, 70 parts of sodium perborate, 8 parts of sodium tetraborate pentahydrate, 1.8 parts of polyethylene glycol, and 0.2 parts of magnesium stearate were put into a two-dimensional mixer and mixed uniformly to obtain a mixed material.

[0032] S2. The mixture is passed through a 40-mesh sieve and tabletted to obtain a granular long-acting oxygenator.

[0033] Example 3

[0034] Preparation of long-acting oxygenator for aquaculture water

[0035] S1, 10 parts of sodium percarbonate, 75 parts of sodium perborate, 13.5 parts of sodium tetraborate pentahydrate, 1.2 parts of polyethylene glycol, and 0.3 parts of magnesium stearate were put into a two-dimensional mixer and mixed uniformly to obtain a mixed material.

[0036] S2. The mixture is passed through a 40-mesh sieve and tabletted to obtain a granular long-acting oxygenator.

[0037] Example 4

[0038] Preparation of long-acting oxygenator for aquaculture water

[0039] S1, 10 parts of sodium percarbonate, 80 parts of sodium perborate, 8.5 parts of sodium tetraborate pentahydrate, 1.2 parts of polyethylene glycol, and 0.3 parts of magnesium stearate were put into a two-dimensional mixer and mixed uniformly to obtain a mixed material.

[0040] S2. The mixture is passed through a 40-mesh sieve and tabletted to obtain a granular long-acting oxygenator.

[0041] Example 5

[0042] Preparation of long-acting oxygenator for aquaculture water

[0043] S1, 5 parts of sodium percarbonate, 80 parts of sodium perborate, 14 parts of sodium tetraborate pentahydrate, 0.6 parts of polyethylene glycol, and 0.4 parts of magnesium stearate were put into a two-dimensional mixer and mixed uniformly to obtain a mixed material.

[0044] S2. The mixture is passed through a 40-mesh sieve and tabletted to obtain a granular long-acting oxygenator.

[0045] Comparative Example 1

[0046] S1. Put 85% sodium percarbonate, 12.8% sodium sulfate, 2% polyethylene glycol and 0.2% magnesium stearate into a two-dimensional mixer by weight percentage, mix well to obtain a mixed material.

[0047] S2. The mixture is passed through a 40-mesh sieve and tabletted to obtain a granular long-acting oxygenator.

[0048] Comparative Example 2

[0049] S1. Put 85% sodium perborate, 12.8% sodium sulfate, 2% polyethylene glycol and 0.2% magnesium stearate into a two-dimensional mixer by weight percentage, mix well to obtain a mixed material.

[0050] S2. The mixture is passed through a 40-mesh sieve and tabletted to obtain a granular long-acting oxygenator.

[0051] Comparative Example 3

[0052] S1, 20 parts of sodium percarbonate, 65 parts of sodium perborate, 1.8 parts of polyethylene glycol and 0.2 parts of magnesium stearate were put into a two-dimensional mixer and mixed evenly to obtain a mixed material.

[0053] S2. The mixture is passed through a 40-mesh sieve and tabletted to obtain a granular long-acting oxygenator.

[0054] Comparative Example 4

[0055] Preparation of long-acting oxygenator for aquaculture water

[0056] S1, 20 parts of sodium percarbonate, 13 parts of sodium tetraborate pentahydrate, 1.8 parts of polyethylene glycol, and 0.2 parts of magnesium stearate were put into a two-dimensional mixer and mixed evenly to obtain a mixed material.

[0057] S2. The mixture is passed through a 40-mesh sieve and tabletted to obtain a granular long-acting oxygenator.

[0058] Experimental Example 1

[0059] The oxygenation effect of the oxygenator prepared in the embodiment and the comparative example in the simulated pond was investigated

[0060] One (about 2 g) of oxygen enhancer prepared in each of Examples 1-5 and Comparative Examples 1-2 was added to a glass tank filled with 20 L of pond water. The water temperature was controlled at 27° C. A small aeration device was added to the water tank to simulate the flow of flowing water. The dissolved oxygen in the water was observed and tested and recorded at 0, 1, 2, 4, 8, 16, 24, and 36 hours. The specific experimental data are shown in Table 1 below:

[0061] Table 1 Oxygenation effect of oxygenating agents prepared in Examples 1-5 and Comparative Examples 1-2

[0062]

[0063] The results show that, compared with Comparative Examples 1 and 2, Examples 1, 2, 3, 4, and 5 have both the ability of rapid oxygenation in the early stage and stable oxygen release in the middle and late stages, while extending the oxygen release time of the oxygenator.

[0064] Experimental Example 2

[0065] The oxygenation effect of the oxygenator prepared in the examples and comparative examples in the actual pond was investigated.

[0066] In the summer, under the continuous high temperature weather, the experiment was carried out in the dense fish pond, and the dosage was 5kg / mu. The specific experiment is shown in the following 2:

[0067] Table 2 Effects of oxygenators prepared in Examples and Comparative Examples on fish schools

[0068]

[0069]

[0070] The results show that compared with Comparative Example 1, the slow-release oxygenation components added to the formulations of Examples 1, 3, and 5 greatly increase the oxygen release time of the oxygenator, which can reduce the frequency of workers patrolling the pond and using the oxygenator, thereby reducing the breeding cost.

[0071] Moreover, the sustained-release effect of the oxygenator prepared in this scheme cannot be achieved without sodium tetraborate pentahydrate or sodium perborate. Sodium tetraborate pentahydrate and sodium perborate have a synergistic oxygenation effect.

[0072] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. For those skilled in the art, improvements and changes obtained without departing from the technical concept of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A long-acting oxygenator for aquaculture water, characterized in that: Including sodium percarbonate, sodium perborate, sodium tetraborate pentahydrate polyethylene glycol and magnesium stearate.

2. The long-acting oxygenator for aquaculture water according to claim 1, characterized in that: The weight components of the sodium percarbonate, sodium perborate, sodium tetraborate pentahydrate polyethylene glycol and magnesium stearate are 5-20 parts, 65-85 parts, 5-15 parts, 0.5-2 parts and 0.2 parts to 0.5 parts respectively.

3. A method for preparing a long-acting oxygenator for aquaculture water according to claim 1, characterized in that: The following steps are involved: S1, taking sodium percarbonate, sodium perborate, sodium tetraborate pentahydrate, polyethylene glycol and magnesium stearate, putting them into a two-dimensional mixer in proportion, and mixing them evenly to obtain a mixed material; S2. The mixed material obtained in S1 is sieved and tabletted to obtain a granular long-acting oxygenator.

4. The method for preparing a long-acting oxygenator for aquaculture water according to claim 3, characterized in that: The hole size of the sieving in step S2 is 40 mesh.

5. Use of the long-acting oxygenator for aquaculture water as described in any one of claims 1-2 or the long-acting oxygenator for aquaculture water prepared by the preparation method as described in any one of claims 3-4 in long-term oxygenation of aquaculture water.

6. The use according to claim 5, characterized in that: The dosage of the long-acting oxygenator for aquaculture water is 5kg / mu.

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