CN116102154A - Sodium persulfate composite salt substrate modifier for aquaculture and preparation method thereof - Google Patents

Abstract

The invention relates to a sodium persulfate composite salt substrate modifier for aquaculture and a preparation method thereof, wherein the substrate modifier comprises the following components in parts by mass: 40-55 parts of sodium persulfate composite salt, 5-10 parts of organic acid, 1-5 parts of stabilizer, 20-50 parts of adsorption filler, 2-5 parts of surfactant and 2-8 parts of flocculant. The sodium bisulfate composite salt is taken as the main component of the water body substrate modifier, has strong oxidability, can release active oxygen, free radicals and other derivatives after being contacted with a culture water body, can efficiently oxidize and decompose organic matters, hydrogen sulfide, nitrite, ferrous iron and other reducing substances through a chain reaction, changes low deodorization, has the effects of improving the dissolved oxygen and the oxidation-reduction potential of bottom mud, adjusting pH, sterilizing and the like, and has no harmful residues to the environment; the water body substrate modifier can further improve the removal rate of pollutants by compounding with organic acid, a stabilizer, an adsorption filling agent, a surfactant and a flocculating agent, so that the water body is clearer and more transparent.

Description

Sodium persulfate composite salt substrate modifier for aquaculture and preparation method thereof

Technical Field

The invention relates to the technical field of aquaculture, in particular to a sodium bisulfate composite salt substrate modifier for aquaculture and a preparation method thereof.

Background

Along with the continuous increase of the pond culture area in China, the aquaculture industry has a plurality of problems, such as serious illness and outbreak epidemic of main culture varieties; the waste water discharge and the organic sludge accumulation formed by the residual baits, the feces and the biological debris cause serious pollution to the water body, the pond substrate and the culture surrounding environment. The fishermen are urgent to need a product which can improve and optimize the ecological environment of aquaculture, but does not greatly increase the cultivation cost so as not to influence the cultivation benefits of the fishermen. The water body substrate modifier is produced and widely applied to production.

According to the action principle and source, the water body substrate modifier is divided into three types of physical activity modifier, chemical activity modifier and microecological preparation. The chemical activity modifier is represented by various ion exchangers, complexing agents, flocculating agents, oxidizing agents and the like, and the action mechanism of the chemical activity modifier is to degrade harmful substances in water body through chemical actions such as ion exchange complexing, flocculation, oxidation reduction and the like, so that the effects of improving substrate and purifying water quality are achieved. The conventional aquaculture products such as calcium peroxide and sodium carbonate have the problems that organic matters are not thoroughly decomposed and the hypoxia of the bottom layer cannot be relieved permanently.

Chinese patent CN1453221a discloses an improver for ecological environment of bottom materials of an aquaculture pond, which improves microbial activity of bottom mud, enhances digestion capability of the bottom mud, and obviously reduces harmful substances in the pond, but the improver is a powder product, and is required to be prepared into suspension for use, and cannot well reach the bottom of the pond to play a role; chinese patent CN 108041072A discloses potassium hydrogen persulfate particles which have the effects of sterilization, bottom modification, oxygenation, water regulation and deodorization in aquaculture, but the excessive dosage of the potassium hydrogen persulfate particles also has toxicity safety risks, and the potassium salt preparation cost is higher because the problems of less Chinese potassium resources, relatively sensitive potassium compounds to temperature, relatively complex preparation process route and the like exist. Therefore, there is a need to develop an efficient, green and low-cost water body substrate modifier.

Disclosure of Invention

The technical problems to be solved by the invention are as follows: the invention provides a sodium bisulfate composite salt substrate modifier for aquaculture and a preparation method thereof, which realize the efficient degradation of pollutants such as ammonia nitrogen, nitrite, organic matters and the like in pond substrate sludge with lower cost, and quickly restore the ecological environment of the pond bottom, so that the purified water body can maintain good water quality.

In order to solve the technical problems, the invention adopts the following technical scheme:

the invention provides a sodium persulfate composite salt substrate modifier for aquaculture, which comprises the following components in parts by mass:

40-55 parts of sodium persulfate composite salt, 5-10 parts of organic acid, 1-5 parts of stabilizer, 20-50 parts of adsorption filler, 2-5 parts of surfactant and 2-8 parts of flocculant.

The sodium bisulfate composite salt is taken as the main component of the water body substrate modifier, has strong oxidability, can release active oxygen, free radicals and other derivatives after being contacted with a culture water body, can efficiently oxidize and decompose organic matters, hydrogen sulfide, nitrite, ferrous iron and other reducing substances through a chain reaction, changes low deodorization, has the effects of improving the dissolved oxygen and the oxidation-reduction potential of bottom mud, adjusting pH, sterilizing and the like, and has no harmful residues to the environment; the introduction of the organic acid can enhance the oxidation activity of the sodium persulfate composite salt and improve the oxidation and sterilization capacities of the sodium persulfate composite salt; the stabilizer can reduce the loss of active oxygen of sodium persulfate composite salt; the water body substrate modifier can further improve the removal rate of pollutants by compounding with the adsorption filler, the surfactant and the flocculant, so that the water body is clearer and more transparent.

Optionally, the sodium persulfate composite salt consists of sodium persulfate, sodium bisulfate and sodium sulfate, wherein the content of active oxygen is more than or equal to 4.6%, and the loss of active oxygen is less than 1.0%.

From the above description, sodium persulfate composite salt has higher active oxygen content and better stability.

Optionally, the organic acid is one or more of citric acid, stearic acid, malic acid, tartaric acid and sorbic acid.

From the above description, it is known that the organic acid plays a catalytic role, and can enhance the oxidation activity of the sodium persulfate composite salt and improve the oxidation and sterilization capacities thereof.

Optionally, the stabilizer is one or more of anhydrous sodium sulfate, anhydrous sodium carbonate and anhydrous sodium bicarbonate.

According to the description, the stabilizer can reduce the loss of active oxygen during the placement and storage of the sodium persulfate composite salt, and enhance the stability of the water body substrate modifier.

Optionally, the adsorption filling agent is one or more of bentonite powder, zeolite powder, magnesium hydroxide, sepiolite powder, pyrophyllite powder and nano calcium carbonate;

the particle size of the adsorption filling agent is less than 100 meshes.

According to the description, the adsorption filling agent has the characteristics of large surface area and multiple pores, and can adsorb toxic and harmful substances such as ammonia nitrogen, hydrogen sulfide, heavy metal ions and the like in the pond sediment into the porous structure of the pond sediment through stronger physical adsorption, so that the concentration of the toxic and harmful substances is reduced; meanwhile, the sodium bisulfate composite salt can be used as a good carrier of a water body substrate modifier, and is beneficial to improving the removal rate of the sodium bisulfate composite salt on pollutants.

Optionally, the surfactant is one or more of sodium dodecyl sulfonate, sodium dodecyl benzene sulfonate, sodium dodecyl sulfate and polyvinylpyrrolidone.

From the above description, it is known that the surfactant can improve the compatibility between the components of the water substrate modifier, so that the modifier particles are well formed.

Optionally, the flocculant is one or more of polyaluminum chloride, polymeric ferric sulfate, polyacrylamide and sodium polyacrylate.

From the above description, it is known that the flocculant can complex heavy metals in the bottom mud of the aquaculture water body to aggregate, and destroy the micelle stability of other harmful substances, thereby forming flocculent coagulated precipitate.

The invention also provides a preparation method of the sodium persulfate composite salt substrate modifier for aquaculture, which comprises the following steps of:

s1, weighing sodium bisulfate composite salt, organic acid, a stabilizer, an adsorption filler, a surfactant and a flocculating agent according to a formula under the environment with humidity of 30-50%, and then drying and crushing the sodium bisulfate composite salt;

s2, sieving the crushed materials through a 100-mesh sieve, and then mixing for 40-50min;

s3, granulating the uniformly mixed material to prepare particles with the granularity of 8-20 meshes.

The technical effects corresponding to the preparation method of the sodium persulfate composite salt substrate modifier for aquaculture provided in the second aspect refer to the related description of the sodium persulfate composite salt substrate modifier for aquaculture provided in the first aspect.

Detailed Description

In order to better understand the above technical solution, the present invention will now be described in detail with reference to specific embodiments. While the preferred embodiments of the present invention are described below, it should be understood that the present invention may be embodied in various forms and should not be limited to the examples set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

The embodiment of the invention provides a sodium persulfate composite salt substrate modifier for aquaculture, which comprises the following components in parts by mass:

40-55 parts of sodium persulfate composite salt, 5-10 parts of organic acid, 1-5 parts of stabilizer, 20-50 parts of adsorption filler, 2-5 parts of surfactant and 2-8 parts of flocculant.

The sodium persulfate composite salt consists of sodium persulfate, sodium bisulfate and sodium sulfate, wherein the content of active oxygen is more than or equal to 4.6%, and the loss of active oxygen is less than 1.0%.

The organic acid is one or more of citric acid, stearic acid, malic acid, tartaric acid and sorbic acid.

The stabilizer is one or more of anhydrous sodium sulfate, anhydrous sodium carbonate and anhydrous sodium bicarbonate.

The adsorption filler is one or more of bentonite powder, zeolite powder, magnesium hydroxide, sepiolite powder, pyrophyllite powder and nano calcium carbonate;

the particle size of the adsorption filling agent is less than 100 meshes.

The surfactant is one or more of sodium dodecyl sulfonate, sodium dodecyl benzene sulfonate, sodium dodecyl sulfate and polyvinylpyrrolidone.

The flocculant is one or more of polyaluminum chloride, polymeric ferric sulfate, polyacrylamide and sodium polyacrylate.

It is prepared by the following method:

s1, weighing sodium bisulfate composite salt, organic acid, a stabilizer, an adsorption filler, a surfactant and a flocculating agent according to a formula under the environment with humidity of 30-50%, and then drying and crushing the sodium bisulfate composite salt;

s2, sieving the crushed materials through a 100-mesh sieve, and then mixing for 40-50min;

s3, granulating the uniformly mixed material to prepare particles with the granularity of 8-20 meshes.

Example 1

Under the environment with the humidity of 30-50%, weighing 45.6 parts of sodium bisulfate composite salt, 7.2 parts of stearic acid, 4.5 parts of anhydrous sodium carbonate, 33.7 parts of zeolite powder, 3.2 parts of sodium dodecyl sulfate and 5.8 parts of polyacrylamide, drying and crushing; sieving the crushed materials with a 100-mesh sieve, and mixing for 40min; and finally, granulating the uniformly mixed materials by a dry rolling granulator to prepare particles with the granularity of 8-20 meshes.

Example 2

Weighing 40.5 parts of sodium bisulfate composite salt, 6.8 parts of citric acid, 3.5 parts of anhydrous sodium sulfate, 41.7 parts of bentonite powder, 3.0 parts of sodium dodecyl benzene sulfonate and 4.5 parts of polyaluminum chloride in an environment with the humidity of 30-50%, drying and crushing; sieving the crushed materials with a 100-mesh sieve, and mixing for 40min; and finally, granulating the uniformly mixed materials by a dry rolling granulator to prepare particles with the granularity of 8-20 meshes.

Example 3

Weighing 50.5 parts of sodium bisulfate composite salt, 6.6 parts of sorbic acid, 4.2 parts of anhydrous sodium sulfate, 30.2 parts of sepiolite powder, 3.5 parts of sodium dodecyl sulfate and 5.0 parts of polyaluminum chloride in an environment with the humidity of 30-50%, drying and crushing; sieving the crushed materials with a 100-mesh sieve, and mixing for 40min; and finally, granulating the uniformly mixed materials by a dry rolling granulator to prepare particles with the granularity of 8-20 meshes.

Example 4

Under the environment with the humidity of 30-50%, weighing 45.3 parts of sodium bisulfate composite salt, 6.8 parts of tartaric acid, 4.2 parts of anhydrous sodium carbonate, 34.8 parts of magnesium hydroxide, 3.3 parts of sodium dodecyl sulfate and 5.6 parts of polyacrylamide, drying and crushing; sieving the crushed materials with a 100-mesh sieve, and mixing for 40min; and finally, granulating the uniformly mixed materials by a dry rolling granulator to prepare particles with the granularity of 8-20 meshes.

Example 5

Weighing 48.4 parts of sodium bisulfate composite salt, 7.0 parts of tartaric acid, 4.0 parts of anhydrous sodium bicarbonate, 31.8 parts of bentonite powder, 3.2 parts of sodium dodecyl benzene sulfonate and 5.6 parts of sodium polyacrylate in an environment with the humidity of 30-50%, drying and crushing; sieving the crushed materials with a 100-mesh sieve, and mixing for 40min; and finally, granulating the uniformly mixed materials by a dry rolling granulator to prepare particles with the granularity of 8-20 meshes.

Example 6

Under the environment with the humidity of 30-50%, 42.4 parts of sodium bisulfate composite salt, 6.9 parts of citric acid, 4.2 parts of anhydrous sodium bicarbonate, 37.6 parts of pyrophyllite powder, 3.4 parts of polyvinylpyrrolidone and 5.5 parts of polyacrylamide are weighed, dried and crushed; sieving the crushed materials with a 100-mesh sieve, and mixing for 40min; and finally, granulating the uniformly mixed materials by a dry rolling granulator to prepare particles with the granularity of 8-20 meshes.

Comparative example 1

This comparative example differs from example 1 in that the sodium peroxodisulfate complex salt was replaced by an equivalent amount of potassium peroxodisulfate complex salt (active oxygen content. Gtoreq.4.5%).

Comparative example 2

This comparative example differs from example 1 in that the sodium peroxodisulfate complex salt was replaced by an equivalent amount of calcium peroxodisulfate (content. Gtoreq.60%).

Application test experiments were carried out on the water body substrate modifier particles prepared in examples 1-6 and comparative examples 1-2, and specific embodiments are as follows:

the experimental example is carried out by selecting a certain farm of Xiamen, and 9 shrimp culture ponds are respectively 6 example groups, 2 comparison example groups and a blank control group (the blank control group is in the ponds without adding water body substrate modifier). Each pond has an area of 1000 square meters and a water depth of 1.8-2 meters, the pond bottom is sediment, and the dosage of the water bottom modifier is 0.25g/m ² . Detecting various indexes before and after the water body substrate modifier is put in, including pH, dissolved Oxygen (DO), chemical Oxygen Demand (COD) and ammonia Nitrogen (NH) ₄ -N), nitrite (NO ₂ ) Hydrogen sulfide of bottom mud (H) ₂ S) and the substrate sludge redox potential (E), and the results are shown in table 1.

TABLE 1 Water index variation of ponds before and after administration of Water substrate modifier

As can be seen from the data in Table 1, examples 1-6 show that the contents of ammonia nitrogen, nitrite and sediment hydrogen sulfide in the water body treated by the sodium bisulfate composite salt substrate modifier are obviously reduced, the dissolved oxygen of the water body is obviously increased, and the oxidation-reduction potential of the sediment is changed from a reduced substrate to an oxidized substrate, so that the substrate modifier can effectively degrade pollutants in the water, the transparency of the water body is improved, the water quality is obviously improved, and the growth of aquatic animals and the survival rate of the aquatic animals are promoted; the dissolved oxygen of the blank control group has no obvious change, the contents of ammonia nitrogen, nitrite and sediment hydrogen sulfide are in an ascending trend, and the redox potential reducibility of the sediment is enhanced. As can be seen from the comparison of example 1 with comparative examples 1 and 2, the sodium persulfate composite salt base modifier prepared according to the formulation of the present invention has slightly better performance than the potassium persulfate composite salt and the calcium peroxide base modifier.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims (8)

1. The sodium persulfate composite salt substrate modifier for aquaculture comprises the following components in parts by mass:

40-55 parts of sodium persulfate composite salt, 5-10 parts of organic acid, 1-5 parts of stabilizer, 20-50 parts of adsorption filler, 2-5 parts of surfactant and 2-8 parts of flocculant.

2. The sodium persulfate composite salt substrate modifier for aquaculture according to claim 1, wherein the sodium persulfate composite salt consists of sodium persulfate, sodium bisulfate and sodium sulfate, the active oxygen content is more than or equal to 4.6%, and the monthly active oxygen loss is less than 1.0%.

3. A sodium persulfate composite salt substrate modifier for aquaculture according to claim 1, wherein the organic acid is one or more of citric acid, stearic acid, malic acid, tartaric acid and sorbic acid.

4. A sodium persulfate composite salt substrate modifier for aquaculture according to claim 1, wherein the stabilizer is one or more of anhydrous sodium sulfate, anhydrous sodium carbonate and anhydrous sodium bicarbonate.

5. The sodium persulfate composite salt substrate modifier for aquaculture according to claim 1, wherein the adsorption filler is one or more of bentonite powder, zeolite powder, magnesium hydroxide, sepiolite powder, pyrophyllite powder and nano calcium carbonate;

the particle size of the adsorption filling agent is less than 100 meshes.

6. A sodium persulfate composite salt substrate modifier for aquaculture according to claim 1, wherein the surfactant is one or more of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, sodium dodecyl sulfate, and polyvinylpyrrolidone.

7. The sodium persulfate composite salt substrate modifier for aquaculture according to claim 1, wherein the flocculant is one or more of polyaluminum chloride, polymeric ferric sulfate, polyacrylamide and sodium polyacrylate.

8. A method for preparing the sodium persulfate composite salt substrate modifier for aquaculture according to any one of claims 1 to 7, comprising the following steps:

s1, weighing sodium bisulfate composite salt, organic acid, a stabilizer, an adsorption filler, a surfactant and a flocculating agent according to a formula under the environment with humidity of 30-50%, and then drying and crushing the sodium bisulfate composite salt;

s2, sieving the crushed materials through a 100-mesh sieve, and then mixing for 40-50min;

s3, granulating the uniformly mixed material to prepare particles with the granularity of 8-20 meshes.