An oxygen slow-release ball for maintaining pH stability and its application in sea cucumber transportation

Abstract

The invention discloses an oxygen slow-release ball for maintaining pH stability and its application in sea cucumber transportation, belonging to the technical field of aquatic product transportation. The oxygen slow-release ball is prepared from raw materials including: oxygenator, fumaric acid, polyvinyl alcohol, xanthan gum, and zeolite, and the mass ratio thereof is (1.5-3): (2-4): (5.5-8): (3-6): (2.5-4); the oxygen slow-release ball of the invention can better control the continuity and total amount of oxygen release, and avoid the problem of reduced survival rate caused by autolysis of sea cucumbers due to insufficient oxygen in the transportation environment.

Description

Technical Field

[0001] The invention belongs to the technical field of aquatic product transportation, and particularly relates to an oxygen slow-release ball for maintaining pH stability and application thereof in sea cucumber transportation. Background Art

[0002] With the continuous growth of the national economy and the continuous improvement of people's living standards, people are pursuing higher quality and more nutritious food. Sea cucumbers have been a precious and rare aquatic product since ancient times, and its market demand is constantly expanding. Sea cucumbers have a strong autolysis ability and are difficult to transport and preserve for a long time. Therefore, sea cucumbers have been commercialized and transported in a processed form since ancient times. However, processed sea cucumbers, such as salt-dried sea cucumbers and sugar-dried sea cucumbers, need to be repeatedly soaked and boiled before eating, which is cumbersome to operate and loses all water-soluble nutrients, so they can no longer meet the needs of consumers. In addition, consumers are more inclined to buy fresh aquatic products, such as fresh sea cucumbers. Fresh sea cucumbers are difficult to transport over long distances due to autolysis. Practice has shown that adding oxygen can significantly extend the storage and transportation time of sea cucumbers. Oxygen is considered to be one of the most important environmental factors in the transportation process of sea cucumbers, and hypoxia causes the metabolic rate of sea cucumbers to decrease, physiological function to be lost, health to decline, and autolysis to occur, resulting in huge economic losses. However, the addition of oxygen will increase the difficulty of operation, occupy volume, and there are safety risks. Sufficient dissolved oxygen is a necessary condition for the survival of sea cucumbers during transportation, and even directly affects the survival rate of sea cucumbers during transportation. Therefore, it is extremely necessary to develop an oxygen slow-release ball, which can extend the transportation time of sea cucumbers, and is simple to operate and low in cost. At present, it has been reported that oxygen slow-release materials have been prepared, but they are mostly used in the field of environmental water purification. However, it cannot be applied to the field of aquatic product survival transportation. For example, the preservation of sea cucumbers requires less water in the container and is in a closed state for a long time. The currently disclosed oxygen slow-release materials will release oxygen while releasing the material itself, which greatly changes the pH of the surrounding water. This will not have a significant impact on the opening of a huge amount of water, but it is not suitable for the application of aquatic product transportation with limited water volume (for example, less than 1 liter of water). The pH of the water environment changed by it is enough to have a fatal effect on the preservation of aquatic products. In view of this, the present invention discloses a preparation of an oxygen slow-release ball suitable for the long-distance transportation of aquatic products such as sea cucumbers. It can be applied to small-volume water bodies, and on the premise of slow-release oxygen to increase dissolved oxygen, it can keep the pH of the water body stable and maintain the environmental pH range suitable for sea cucumbers. This slow-release oxygen ball is low-cost, easy to use, and can release oxygen for a long time to increase the dissolved oxygen in the water, while maintaining a suitable pH environment for keeping sea cucumbers alive. Therefore, it can further promote the economic development of the sea cucumber industry. Summary of the invention

[0003] The purpose of the present invention is to address the deficiencies in the existing sea cucumber transportation, preservation and storage, and to provide a method for preparing an oxygen slow-release ball used for sea cucumber transportation, preservation and survival.

[0004] To solve the above problems, the present invention proposes the following technical solutions:

[0005] A method for preparing a slow-release oxygen balloon used in sea cucumber transportation comprises the following steps:

[0006] (1) mixing an oxygenant and xanthan gum in water to obtain an oxygenant / xanthan gum mixture;

[0007] (2) mixing polyvinyl alcohol, fumaric acid and water to obtain a polyvinyl alcohol / fumaric acid mixed colloid;

[0008] (3) mixing the oxygenant / xanthan gum mixture of step (1) and the polyvinyl alcohol / fumaric acid mixed colloid of step (2) to obtain an oxygen slow-release colloid;

[0009] (4) The oxygen slow-release colloid of step (3) is evenly mixed with zeolite to obtain oxygen slow-release balls.

[0010] Furthermore, the oxygenator is one or more of calcium peroxide, potassium peroxide, magnesium peroxide, and urea peroxide.

[0011] Preferably, the oxygenator is calcium peroxide.

[0012] Furthermore, in the step (1), the mass ratio of the oxygenant to the xanthan gum is 1:(2-2.25).

[0013] Furthermore, in step (1), the mass volume ratio of the oxygenator to water is 1.5 g: (2-15) mL.

[0014] Furthermore, the mixing in step (1) is carried out by stirring at a speed of 100 r / min at 10-60° C. for 5-8 min.

[0015] Furthermore, in the step (2), the mass ratio of polyvinyl alcohol to fumaric acid is (2-2.5):1.

[0016] Furthermore, in the step (2), the volume mass ratio of water to polyvinyl alcohol is (2-15) mL:6 g.

[0017] Furthermore, the mixing in step (2) is performed by stirring at a constant speed of 100 r / min for 5-8 min at 10-60°C.

[0018] Furthermore, in the step (3), the mass ratio of the oxygen slow-release colloid to the zeolite is (2-2.5):1.

[0019] Furthermore, the mixing in step (3) is carried out by stirring at a speed of 100 r / min for 5-8 min at 10-60°C.

[0020] Preferably, the mass ratio of oxygenator, fumaric acid, polyvinyl alcohol, xanthan gum and zeolite in the slow-release oxygen ball is 1.5:2.5:6:3.2:2.8;

[0021] Or 2:3.3:7:4:3;

[0022] Or 2.5:4:8:5.6:3.5.

[0023] Compared with the prior art, the preparation method of the oxygen slow-release ball provided by the present invention has the following beneficial effects:

[0024] 1. The oxygen slow-release ball provided by the present invention can better control the continuity and total amount of oxygen release, the oxygen release rate is uniform, and the oxygen release duration is prolonged.

[0025] 2. Since peroxide decomposes in water and releases oxygen, it will also produce corresponding hydroxides, which will cause the pH of the transport water microenvironment to increase, affecting the water quality. Therefore, the present invention adds a buffer substance that can participate in the slow-release system to the material, and prepares a slow-release oxygen ball that can slowly release oxygen and buffer the pH value to improve the water environment during the storage and transportation of sea cucumbers, provide a stable pH condition for the survival of sea cucumbers during transportation, and provide a long-term, efficient slow-release oxygen source.

[0026] 3. The method for preparing the oxygen slow-release balls provided by the present invention has high efficiency, low energy consumption, cheap raw materials, low technical requirements for operators, and is suitable for large-scale production.

[0027] 4. The raw materials used in the oxygen slow-release ball provided by the present invention are non-toxic and have no side effects, and will not have a negative impact on sea cucumbers. The production process is green and environmentally friendly, and has little environmental pollution, which can avoid causing environmental pollution and promote the rational development and utilization of resources. The materials are highly safe and of stable quality.

[0028] 5. The oxygen slow-release ball provided by the present invention can reduce the soluble protein and ammonia nitrogen content of the environment of sea cucumbers during transportation to a certain extent; increase the dissolved oxygen content in the water, which has a beneficial effect on extending the preservation and survival time of sea cucumbers during transportation.

[0029] 6. The oxygen slow-release ball provided by the present invention is mainly used in the preservation and survival transportation of sea cucumbers. It has strong stability and suitable size, and can provide salinity, pH value, oxygen demand and other factors that are adapted to the sea cucumbers. It can provide a stable transportation environment for sea cucumbers and avoid the autolysis of sea cucumbers and the reduction of survival rate due to changes in the living environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a diagram showing the change in dissolved oxygen content in Example 1.

[0031] Figure 2 This is the pH value of the blank control group, oxygen sustained-release ball group and comparison material group on the 5th day of transportation.

[0032] Figure 3 Salinity values ​​of the blank control group, oxygen slow-release ball group and comparison material group on the 5th day of transportation.

[0033] Figure 4 This is the soluble protein content in the blank control group, oxygen sustained-release ball group and comparison material group on the 5th day of transportation.

[0034] Figure 5 This is the ammonia nitrogen content in the blank control group, oxygen slow-release ball group and comparison material group on the 5th day of transportation.

[0035] Figure 6 This is the dissolved oxygen content of the blank control group, oxygen slow-release ball group and comparison material group on the 5th day of transportation. DETAILED DESCRIPTION

[0036] Source of raw materials:

[0037] The raw materials used in this experiment are fresh sea cucumbers with a body length of about 12-15cm and a weight of about 100-130g / piece. Each sea cucumber is healthy and in good condition. They were purchased from Liujiaqiao Seafood Market in Ganjingzi District, Dalian City, Liaoning Province, and caught in the Yellow Sea near Dalian City, Liaoning Province (35-45°N, 120-123°E). Calcium peroxide: Wuhan Shangjing Biotechnology Co., Ltd.; Fumaric acid: purity: 99%, company: Aladdin; Polyvinyl alcohol 1788 type: alcoholysis degree: 87.0%-89.0% (mol / mol), company: McLean; Xanthan gum: company: McLean.

[0038] The embodiments of the present application are described in detail below in conjunction with the accompanying drawings, and specific operation processes are given. However, the described embodiments are only some of the preferred embodiments within the protection scope of the present application, rather than all of the embodiments.

[0039] Example 1

[0040] Preparation process: Calcium peroxide, fumaric acid, polyvinyl alcohol, xanthan gum and zeolite in a mass ratio of 1.5:2.5:6:3.2:2.8 are used to prepare the required oxygen slow-release balls. The process is as follows:

[0041] (1) First, calcium peroxide and xanthan gum in the above mass ratio are added to distilled water (the volume mass ratio of distilled water to calcium peroxide is 4 mL:1.5 g), and stirred at a speed of 100 r / min for 6 min at 30 degrees Celsius to obtain an oxygenator / xanthan gum mixture;

[0042] (2) stirring the polyvinyl alcohol, fumaric acid and distilled water (the volume mass ratio of distilled water to polyvinyl alcohol is 4 mL:6 g) at 30 degrees Celsius at a speed of 100 r / min for 6 minutes to obtain a polyvinyl alcohol / fumaric acid mixed colloid;

[0043] (3) mixing the prepared oxygenator / xanthan gum mixture and the polyvinyl alcohol / fumaric acid mixed colloid, and stirring at a speed of 100 r / min for 6 min to obtain an oxygen slow-release colloid;

[0044] (4) Finally, the zeolite in the above mass ratio is added to the oxygen slow-release colloid and mixed, and stirred at a speed of 100 r / min at 30 degrees Celsius for 6 minutes to obtain oxygen slow-release balls.

[0045] Test process: Fresh sea cucumbers were placed in a single composite plastic packaging bag containing 700mL of artificially prepared seawater with a sodium chloride mass concentration of 31ppm, 3 sea cucumbers were placed in each bag, 10g of oxygen slow-release balls were placed in the packaging bag of the oxygen slow-release ball group, and the packaging bag containing sea cucumbers was placed in a car refrigerator at 4℃ for transportation for 8 days. The water quality for transporting sea cucumbers was tested for pH, salinity, ammonia nitrogen content, soluble protein, and dissolved oxygen content in the water, and the autolysis of the three groups of sea cucumbers was observed every day.

[0046] Example 2

[0047] Preparation process: Calcium peroxide, fumaric acid, polyvinyl alcohol, xanthan gum and zeolite in a mass ratio of 2:3.3:7:4:3 are used to prepare the oxygen slow-release balls required for implementation. The process is as follows:

[0048] (1) First, calcium peroxide and xanthan gum in the above mass ratio are added to distilled water (the volume mass ratio of distilled water to calcium peroxide is 5 mL:2 g), and stirred at a speed of 100 r / min for 6 min at 40 degrees Celsius to obtain an oxygenator / xanthan gum mixture;

[0049] (2) stirring the polyvinyl alcohol, fumaric acid and distilled water (the volume mass ratio of distilled water to polyvinyl alcohol is 5 mL:7 g) at 40 degrees Celsius at a speed of 100 r / min for 6 minutes to obtain a polyvinyl alcohol / fumaric acid mixed colloid;

[0050] (3) mixing the prepared oxygenator / xanthan gum mixture and the polyvinyl alcohol / fumaric acid mixed colloid, and stirring at a speed of 100 r / min for 6 min to obtain an oxygen slow-release colloid;

[0051] (4) Finally, the zeolite in the above mass ratio is added to the oxygen slow-release colloid and mixed, and the mixture is stirred at a constant speed of 100 r / min at 40 degrees Celsius for 6 minutes to obtain oxygen slow-release balls.

[0052] Test process: Fresh sea cucumbers were placed in a single composite plastic packaging bag containing 700mL of artificially prepared seawater with a sodium chloride mass concentration of 30.8ppm. Five sea cucumbers were placed in each bag. 11g of oxygen slow-release balls were placed in the packaging bag of the oxygen slow-release ball group. The packaging bag containing the sea cucumbers was placed in a car refrigerator at 6℃ for transportation for 8 days. The water quality for transporting sea cucumbers was tested for pH, salinity, ammonia nitrogen content, soluble protein, and dissolved oxygen content in the water, and the autolysis of the three groups of sea cucumbers was observed every day.

[0053] Example 3

[0054] Preparation process: Calcium peroxide, fumaric acid, polyvinyl alcohol, xanthan gum and zeolite in a mass ratio of 2.5:4:8:5.6:3.5 are used to prepare the oxygen slow-release balls required for implementation. The process is as follows:

[0055] (1) First, calcium peroxide and xanthan gum in the above mass ratio are added to distilled water (the volume mass ratio of distilled water to calcium peroxide is 6 mL:2.5 g), and stirred at a speed of 100 r / min for 6 min at 50 degrees Celsius to obtain an oxygenator / xanthan gum mixture;

[0056] (2) stirring the polyvinyl alcohol, fumaric acid and distilled water (the volume mass ratio of distilled water to polyvinyl alcohol is 6 mL:8 g) at 50 degrees Celsius at a speed of 100 r / min for 6 minutes to obtain a polyvinyl alcohol / fumaric acid mixed colloid;

[0057] (3) mixing the prepared oxygenator / xanthan gum mixture and the polyvinyl alcohol / fumaric acid mixed colloid, and stirring at a speed of 100 r / min for 6 min to obtain an oxygen slow-release colloid;

[0058] (4) Finally, the zeolite in the above mass ratio is added to the oxygen slow-release colloid and mixed, and the mixture is stirred at a constant speed of 100 r / min at 40 degrees Celsius for 6 minutes to obtain oxygen slow-release balls.

[0059] Test process: Fresh sea cucumbers were placed in a single composite plastic packaging bag filled with 700 mL of natural seawater, 8 sea cucumbers were placed in each bag, 12 g of oxygen slow-release balls were placed in the packaging bag of the oxygen slow-release balls group, and the packaging bags containing sea cucumbers were placed in a car refrigerator at 8°C for transportation for 8 days. The water quality for transporting sea cucumbers was tested for pH, salinity, ammonia nitrogen content, soluble protein, and dissolved oxygen content in the water, and the autolysis of the three groups of sea cucumbers was observed every day.

[0060] Comparative Example 1

[0061] Oxygen slow-release balls were made using calcium peroxide, fumaric acid, polyvinyl alcohol, xanthan gum and zeolite in a mass ratio of 5:3:7:4.5:3. The preparation process of reference example 1 was used, and the testing process of reference example 1 was used for testing.

[0062] Comparative Example 2

[0063] Oxygen slow-release balls were made using calcium peroxide, fumaric acid, polyvinyl alcohol, xanthan gum and zeolite in a mass ratio of 2:1:7:4.5:3. The preparation process of reference example 2 was used, and the testing process of reference example 2 was used for testing.

[0064] Comparative Example 3

[0065] Oxygen slow-release balls were made using calcium peroxide, fumaric acid, polyvinyl alcohol, xanthan gum and zeolite in a mass ratio of 2:3:7:8:3. The preparation process was referred to in Example 3, and the testing process was referred to in Example 3.

[0066] Implementation results of Example 1: The method of step (2) of Example 1 was used to transport sea cucumbers, and the blank control group and the comparative material group were compared. The test process of the blank control group referred to step (2) of Example 1, wherein no oxygen slow-release ball was placed in the packaging bag. The comparative material group was Comparative Example 1, and the oxygen slow-release ball group was Example 1. The results are shown in FIG. Figures 2 to 6 shown.

[0067] White autolysis spots appeared on the body wall surface of the blank control group on the third day, slight autolysis occurred in the comparison material group (Comparative Example 1) on the fourth day, and slight autolysis occurred in the oxygen slow-release ball group (Example 1) on the sixth day. The pH value of the blank control group on the fifth day was 7.12, the salinity of the water was 30.3ppm, the ammonia nitrogen content in the water was 1.85μg / mL, the soluble protein content in the water was 5.71mg / mL, and the dissolved oxygen content in the water was 4.33mg / L; the pH value of the oxygen slow-release ball group on the fifth day was 7.13, the salinity of the water was 30.7ppm, the ammonia nitrogen content in the water was 1.08μg / mL, the soluble protein content in the water was 3.63mg / mL, and the dissolved oxygen content in the water was 7.29mg / L. The pH value of the control material group on the 5th day was 8.82, the salinity of the water was 31.9 ppm, the ammonia nitrogen content in the water was 1.46 μg / mL, the soluble protein content in the water was 4.77 mg / mL, and the dissolved oxygen content in the water was 5.49 mg / L.

[0068] Implementation results of Example 2: The method of step (2) of Example 2 was used to transport sea cucumbers, and the blank control group and the comparative material group were compared. The test process of the blank control group referred to step (2) of Example 2, wherein no oxygen slow-release ball was placed in the packaging bag. The comparative material group was Comparative Example 2, and the oxygen slow-release ball group was Example 2. The results are shown in FIG. Figures 2 to 6 shown.

[0069] White autolysis spots appeared on the body wall surface of the blank control group on the third day, slight autolysis occurred in the contrast material group on the fourth day, and slight autolysis occurred in the oxygen slow-release ball group on the sixth day. The pH value of the blank control group on the fifth day was 7.13, the salinity of the water was 30.2ppm, the ammonia nitrogen content in the water was 2.01μg / mL, the soluble protein content in the water was 5.91mg / mL, and the dissolved oxygen content in the water was 4.22mg / L; the pH value of the oxygen slow-release ball group on the fifth day was 7.1, the salinity of the water was 30.6ppm, the ammonia nitrogen content in the water was 0.96μg / mL, the soluble protein content in the water was 3.75mg / mL, and the dissolved oxygen content in the water was 7.51mg / L. The pH value of the contrast material group on the fifth day was 9.1, the salinity of the water was 31.8ppm, the ammonia nitrogen content in the water was 1.52μg / mL, the soluble protein content in the water was 4.55mg / mL, and the dissolved oxygen content in the water was 5.81mg / L.

[0070] Implementation results of Example 3: The method of step (2) of Example 3 was used to transport sea cucumbers, and the blank control group and the comparative material group were compared. The test process of the blank control group referred to step (2) of Example 3, wherein no oxygen slow-release ball was placed in the packaging bag. The comparative material group was Comparative Example 3, and the oxygen slow-release ball group was Example 3. The results are shown in FIG. Figures 2 to 6 shown.

[0071] White autolysis spots appeared on the body wall surface of the blank control group on the third day, slight autolysis occurred in the contrast material group on the fourth day, and slight autolysis occurred in the oxygen slow-release ball group on the sixth day. The pH value of the blank control group on the fifth day was 7.14, the salinity of the water was 30.6ppm, the ammonia nitrogen content in the water was 1.92μg / mL, the soluble protein content in the water was 6.15mg / mL, and the dissolved oxygen content in the water was 4.76mg / L; the pH value of the oxygen slow-release ball group on the fifth day was 7.1, the salinity of the water was 30.4ppm, the ammonia nitrogen content in the water was 0.94μg / mL, the soluble protein content in the water was 3.46mg / mL, and the dissolved oxygen content in the water was 7.33mg / L. The pH value of the contrast material group on the fifth day was 8.9, the salinity of the water was 32.4ppm, the ammonia nitrogen content in the water was 1.44μg / mL, the soluble protein content in the water was 5.16mg / mL, and the dissolved oxygen content in the water was 5.95mg / L.

[0072] In the example, each oxygen slow-release ball group can maintain a good transportation environment that is beneficial to the survival of sea cucumbers on the fifth day. The oxygen slow-release ball has basically no effect on the pH of the transportation environment. Figure 1As shown in the figure, the slow-release oxygen balls can significantly increase the oxygen solubility in water within 75 hours. After 55 hours, the rate of oxygen release gradually decreases due to the influence of saturation on the dissolved oxygen content in the water, but the dissolved oxygen content in the water continues to increase slowly. The control material group has a certain effect on maintaining the pH of the sea cucumber transportation environment. The slow-release oxygen balls have little effect on the salinity of the transportation environment, such as Figure 2 As shown in the figure, the optimal salinity range for sea cucumbers is 28-32ppm, and the oxygen slow-release ball can continuously maintain the salinity range of the sea cucumber transportation environment at 30-31ppm. The control material group has a certain effect on maintaining the salinity of the sea cucumber transportation environment. Figure 3 As shown in the figure, the soluble protein content of the oxygen slow-release ball group was significantly lower than that of the blank control group, indicating that the oxygen slow-release ball inhibited the decomposition and leakage of tissue proteins caused by autolysis. This shows that the state of the sea cucumbers in the oxygen slow-release ball group is significantly better than that of the blank control group. The control material group has a poorer effect on inhibiting protein decomposition than the oxygen slow-release ball group.

[0073] A small amount of ammonia nitrogen compounds are produced during the normal metabolism of aquatic products. However, if pathological changes occur, such as sea cucumber autolysis, the accelerated decomposition of its own protein will lead to the release of a large amount of ammonia nitrogen compounds. Therefore, the doubling of ammonia nitrogen release is a hallmark indicator of sea cucumber autolysis and deterioration. Excessive ammonia nitrogen content can also cause diseases in sea cucumbers. Studies have shown that the median lethal concentration of ammonia nitrogen in the water of sea cucumber farming is 1.65 mg / L. Figure 4 As shown, on the 5th day of transportation, the ammonia nitrogen content of the blank control group was significantly higher than that of the oxygen-releasing material group and the ammonia nitrogen concentration of the blank control group exceeded the half-lethal concentration, while the ammonia nitrogen content in the water of the oxygen slow-release ball group was lower than the half-lethal concentration and significantly lower than that of the control material group, indicating that the state of the sea cucumbers in the oxygen slow-release ball group was significantly better than that of the blank control group and the control material group. Figure 5 As shown, the dissolved oxygen content in the water of the oxygen slow-release ball group on the 5th day of transportation was significantly higher than that of the blank control group and the comparison material group, indicating that on the 5th day of transportation, the oxygen slow-release ball can still continue to supply oxygen to the sea cucumber transportation environment to maintain the good living state of the sea cucumber.

[0074] In summary, the oxygen slow-release ball provided by the present invention can provide factors such as salinity, pH value, oxygen demand, etc. that are adapted to the needs of sea cucumbers, and can provide a stable transportation environment for sea cucumbers, thereby preventing the sea cucumbers from losing immunity and reducing their survival rate due to changes in their living environment. This has positive significance for further promoting the development of the sea cucumber industry.

Claims

1. A method for preparing an oxygen slow-release ball used in sea cucumber transportation, characterized in that: The following steps are involved: (1) mixing an oxygenant and xanthan gum in water to obtain an oxygenant / xanthan gum mixture; (2) mixing polyvinyl alcohol, fumaric acid and water to obtain a polyvinyl alcohol / fumaric acid mixed colloid; (3) mixing the oxygenant / xanthan gum mixture of step (1) and the polyvinyl alcohol / fumaric acid mixed colloid of step (2) to obtain an oxygen slow-release colloid; (4) mixing the oxygen slow-release colloid of step (3) and zeolite evenly to obtain oxygen slow-release balls; The mass ratio of the oxygenator, fumaric acid, polyvinyl alcohol, xanthan gum and zeolite is 1.5:2.5:6:3.2:2.8; Or, the mass ratio of the oxygenate, fumaric acid, polyvinyl alcohol, xanthan gum and zeolite is 2:3.3:7:4:3; Or, the mass ratio of the oxygenate, fumaric acid, polyvinyl alcohol, xanthan gum and zeolite is 2.5:4:8:5.6:3.

5.

2. The preparation method according to claim 1, characterized in that: The oxygenator is one or more of calcium peroxide, potassium peroxide, magnesium peroxide and urea peroxide.

3. Application of the oxygen slow-release ball obtained by the preparation method according to any one of claims 1 to 2 in seafood farming and seafood transportation.

Images