Sewage treatment agent and method for preparing the same

Abstract

The application discloses a sewage treatment agent and a preparation method thereof. The sewage treatment agent is prepared from the following raw material components in parts by weight: aluminum ash 50-100 parts, a catalyst 1-5 parts, an adsorbent 10-30 parts, a filler 10-20 parts, a silane coupling agent 3-5 parts, a coagulant aid 3-8 parts, polyamino acid 3-6 parts, and water 100-200 parts. The sewage treatment agent is suitable for treating industrial wastewater. The combination use of modified loofah fiber and modified bacterial cellulose in the components enhances the ability of removing CODcr and ammonia nitrogen in the sewage. The combination use of sodium alginate and aloe vera gel enhances the ability of removing suspended solids and total phosphorus in the sewage.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, specifically relating to a wastewater treatment agent and its preparation method. Background Technology

[0002] Wastewater treatment is an important means of protecting the environment and maintaining ecological balance. It aims to purify water quality and reduce pollutant emissions through various methods. The basic methods of wastewater treatment include physical treatment, chemical treatment, and biological treatment, which are often used in combination to achieve better purification results.

[0003] Wastewater treatment processes include physical, chemical, and biological methods. Physical treatment is relatively simple, generally using physical processes to remove suspended solids and fixed substances from wastewater. It is typically used as the first stage of wastewater treatment, primarily for primary treatment. In secondary or tertiary treatment, it can be used in conjunction with biological or chemical treatment methods as an auxiliary treatment to collect solids produced during chemical reactions. Chemical treatment uses chemical reactions to remove pollutants from wastewater, such as heavy metals and organic matter through sedimentation and oxidation-reduction processes. Biological treatment uses microorganisms to remove organic matter, nutrients, and heavy metals from wastewater. Common biological treatment processes include activated sludge processes, biofilm processes, and anaerobic biological treatment processes.

[0004] Sodium aluminate has various applications in chemical wastewater treatment processes, primarily in its chemical flocculation and phosphorus removal functions. As a commonly used chemical flocculant, sodium aluminate can effectively remove suspended solids, phosphates, and other pollutants from wastewater. With the increasing demand for wastewater treatment, the demand for sodium aluminate is also growing, leading to a surge in its price.

[0005] Alumina and silica in aluminum ash can generate sodium chlorate and sodium silicate under appropriate conditions. The technology for preparing sodium chlorate from aluminum ash involves multiple steps, including dissolution, heating, precipitation, filtration, electrolysis, crystallization, separation and drying. However, many reagents are required in the preparation process, and the preparation residues can still pollute the environment. Summary of the Invention

[0006] The purpose of this invention is to provide a wastewater treatment agent and its preparation method.

[0007] A wastewater treatment agent is made from the following raw material components in parts by weight: 50-100 parts aluminum ash, 1-5 parts catalyst, 10-30 parts adsorbent, 10-20 parts filler, 3-5 parts silane coupling agent, 3-8 parts coagulant aid, 3-6 parts polyamino acid, and 100-200 parts water.

[0008] The catalyst is one or a mixture of several of sodium amino acid, sodium carbonate, sodium hydroxide, and potassium hydroxide.

[0009] The adsorbent is a mixture of modified loofah fiber and modified bacterial cellulose in a mass ratio of 5:(1-3).

[0010] The modified loofah fiber is prepared as follows: 5-10 parts by weight of hydrogen peroxide, 1-3 parts by weight of sodium chlorate, and 2-6 parts by weight of magnesium sulfate are added to 60-120 parts by weight of water and stirred until evenly mixed to prepare an soaking solution; the loofah is immersed in the soaking solution for 2-4 hours; then the softened loofah is rinsed with clean water and allowed to stand until neutral; the loofah is then placed in a 2-4% sodium hydroxide aqueous solution for 10-30 minutes, removed, and air-dried to prepare the modified loofah fiber.

[0011] The modified bacterial cellulose is prepared as follows: Take 6-12 parts of urea, 12-20 parts of chlorobenzyl guanidine, and 12-25 parts of citric acid by weight, mix them, and heat to 30-50℃; add 20-40 parts of bacterial cellulose and 30-60 parts of glutaraldehyde, and heat to 70-90℃ to react for 1-3 hours; cool and dry to obtain modified bacterial cellulose.

[0012] The filler is one or a mixture of several of the following: diatomaceous earth, attapulgite, dolomite powder, maifanite powder, activated carbon, rice husk ash, sepiolite powder, and perlite.

[0013] The silane coupling agent is one or a mixture of several of the following: silane coupling agent KH550, silane coupling agent KH560, silane coupling agent KH570, silane coupling agent KH792, and silane coupling agent DL602.

[0014] The coagulant is a mixture of sodium alginate and aloe vera gel in a mass ratio of 3:(1-3).

[0015] The polyamino acid is one or a mixture of several of polyalanine, polyaspartic acid, and polyproline.

[0016] A method for preparing a wastewater treatment agent involves mixing the above-mentioned raw materials, stirring until homogeneous, reacting for 1-3 hours, stirring again until homogeneous, and then preparing the agent.

[0017] The beneficial effects of the present invention are as follows: The wastewater treatment agent of the present invention is suitable for treating industrial wastewater. The combination of modified loofah fiber and modified bacterial cellulose in the components enhances the ability to remove CODcr and ammonia nitrogen from wastewater. The combination of sodium alginate and aloe vera gel enhances the ability to remove suspended solids and total phosphorus from wastewater. Detailed Implementation

[0018] To facilitate understanding of the present invention, a more comprehensive description will be given below. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the present invention.

[0019] Example 1

[0020] A wastewater treatment agent, characterized in that it is made from the following raw material components in parts by weight: 80 parts aluminum ash, 4 parts sodium hydroxide, 16 parts adsorbent, 15 parts diatomaceous earth, 4 parts silane coupling agent KH550, 6 parts coagulant aid, 5 parts polyaspartic acid, and 150 parts water; wherein the adsorbent is a mixture of modified loofah fiber and modified bacterial cellulose in a mass ratio of 5:2; and the coagulant aid is a mixture of sodium alginate and aloe vera gel in a mass ratio of 3:2.

[0021] The modified loofah fiber is prepared as follows: 8 parts hydrogen peroxide, 2 parts sodium chlorate, and 4 parts magnesium sulfate are added to 80 parts water according to the weight ratio, and stirred and mixed evenly to prepare an soaking solution; the loofah is immersed in the soaking solution for 3 hours; then the softened loofah is rinsed with clean water and allowed to stand and wash until neutral; the loofah is placed in a 3% sodium hydroxide aqueous solution for 20 minutes, then taken out and air-dried to prepare the modified loofah fiber.

[0022] The modified bacterial cellulose is prepared as follows: Take 8 parts of urea, 16 parts of chlorobenzyl guanidine and 18 parts of citric acid by weight, mix them and heat to 40°C; add 30 parts of bacterial cellulose and 50 parts of glutaraldehyde, heat to 80°C and react for 2 hours; cool and dry to prepare modified bacterial cellulose.

[0023] The above-mentioned raw materials are mixed and stirred evenly, reacted for 2 hours, and stirred evenly again to obtain the final product.

[0024] Example 2

[0025] A wastewater treatment agent, characterized in that it is made from the following raw material components in parts by weight: 50 parts aluminum ash, 1 part sodium amino acid, 10 parts adsorbent, 10 parts attapulgite, 3 parts silane coupling agent KH792, 3 parts coagulant aid, 3 parts polyalanine, and 100 parts water; wherein the adsorbent is a mixture of modified loofah fiber and modified bacterial cellulose in a mass ratio of 5:1; and the coagulant aid is a mixture of sodium alginate and aloe vera gel in a mass ratio of 3:1.

[0026] The modified loofah fiber is prepared as follows: 5 parts hydrogen peroxide, 1 part sodium chlorate, and 2 parts magnesium sulfate are added to 60 parts water according to the weight ratio, and stirred and mixed evenly to prepare an soaking solution; the loofah is immersed in the soaking solution for 2 hours; then the softened loofah is rinsed with clean water and allowed to stand and wash until neutral; the loofah is placed in a 2% sodium hydroxide aqueous solution for 10 minutes, then taken out and air-dried to prepare the modified loofah fiber.

[0027] The modified bacterial cellulose is prepared as follows: Take 6 parts of urea, 12 parts of chlorobenzyl guanidine and 12 parts of citric acid by weight, mix them and heat to 30°C; add 20 parts of bacterial cellulose and 30 parts of glutaraldehyde, heat to 70°C and react for 3 hours; cool and dry to prepare modified bacterial cellulose.

[0028] The above-mentioned raw materials are mixed and stirred evenly, reacted for 1 hour, and stirred evenly again to obtain the final product.

[0029] Example 3

[0030] A wastewater treatment agent, characterized in that it is made from the following raw material components in parts by weight: 100 parts aluminum ash, 5 parts sodium carbonate, 30 parts adsorbent, 20 parts maifanite powder, 5 parts silane coupling agent DL602, 8 parts coagulant aid, 6 parts polyproline, and 200 parts water; wherein the adsorbent is a mixture of modified loofah fiber and modified bacterial cellulose in a mass ratio of 5:3; and the coagulant aid is a mixture of sodium alginate and aloe vera gel in a mass ratio of 1:1.

[0031] The modified loofah fiber is prepared as follows: 10 parts by weight of hydrogen peroxide, 3 parts by weight of sodium chlorate, and 6 parts by weight of magnesium sulfate are added to 120 parts by weight of water and stirred until evenly mixed to prepare an soaking solution; the loofah is immersed in the soaking solution for 4 hours; then the softened loofah is rinsed with clean water and allowed to stand until neutral; the loofah is placed in a 4% sodium hydroxide aqueous solution for 30 minutes, then removed and air-dried to prepare the modified loofah fiber.

[0032] The modified bacterial cellulose is prepared as follows: 12 parts by weight of urea, 20 parts by weight of chlorobenzyl guanidine and 25 parts by weight of citric acid are mixed and heated to 50°C; 40 parts by weight of bacterial cellulose and 60 parts by weight of glutaraldehyde are added, and the mixture is heated to 90°C and reacted for 1 hour; the mixture is then cooled and dried to prepare modified bacterial cellulose.

[0033] The above-mentioned raw materials are mixed and stirred evenly, reacted for 3 hours, and stirred evenly again to obtain the final product.

[0034] Comparative Example 1

[0035] A wastewater treatment agent, characterized in that it is made from the following raw material components in parts by weight: 80 parts aluminum ash, 4 parts sodium hydroxide, 16 parts modified loofah fiber, 15 parts diatomaceous earth, 4 parts silane coupling agent KH550, 6 parts coagulant aid, 5 parts polyaspartic acid, and 150 parts water; wherein the coagulant aid is a mixture of sodium alginate and aloe vera gel in a mass ratio of 3:2.

[0036] The modified loofah fiber is prepared as follows: 8 parts hydrogen peroxide, 2 parts sodium chlorate, and 4 parts magnesium sulfate are added to 80 parts water according to the weight ratio, and stirred and mixed evenly to prepare an soaking solution; the loofah is immersed in the soaking solution for 3 hours; then the softened loofah is rinsed with clean water and allowed to stand and wash until neutral; the loofah is placed in a 3% sodium hydroxide aqueous solution for 20 minutes, then taken out and air-dried to prepare the modified loofah fiber.

[0037] The above-mentioned raw materials are mixed and stirred evenly, reacted for 2 hours, and stirred evenly again to obtain the final product.

[0038] Comparative Example 2

[0039] A wastewater treatment agent, characterized in that it is made from the following raw material components in parts by weight: 80 parts aluminum ash, 4 parts sodium hydroxide, 16 parts modified bacterial cellulose, 15 parts diatomaceous earth, 4 parts silane coupling agent KH550, 6 parts coagulant aid, 5 parts polyaspartic acid, and 150 parts water; wherein the coagulant aid is a mixture of sodium alginate and aloe vera gel in a mass ratio of 3:2.

[0040] The modified bacterial cellulose is prepared as follows: Take 8 parts of urea, 16 parts of chlorobenzyl guanidine and 18 parts of citric acid by weight, mix them and heat to 40°C; add 30 parts of bacterial cellulose and 50 parts of glutaraldehyde, heat to 80°C and react for 2 hours; cool and dry to prepare modified bacterial cellulose.

[0041] The above-mentioned raw materials are mixed and stirred evenly, reacted for 2 hours, and stirred evenly again to obtain the final product.

[0042] Comparative Example 3

[0043] A wastewater treatment agent, characterized in that it is made from the following raw material components in parts by weight: 80 parts aluminum ash, 4 parts sodium hydroxide, 16 parts adsorbent, 15 parts diatomaceous earth, 4 parts silane coupling agent KH550, 6 parts sodium alginate, 5 parts polyaspartic acid, and 150 parts water; wherein the adsorbent is a mixture of modified loofah fiber and modified bacterial cellulose in a mass ratio of 5:2.

[0044] The modified loofah fiber is prepared as follows: 8 parts hydrogen peroxide, 2 parts sodium chlorate, and 4 parts magnesium sulfate are added to 80 parts water according to the weight ratio, and stirred and mixed evenly to prepare an soaking solution; the loofah is immersed in the soaking solution for 3 hours; then the softened loofah is rinsed with clean water and allowed to stand and wash until neutral; the loofah is placed in a 3% sodium hydroxide aqueous solution for 20 minutes, then taken out and air-dried to prepare the modified loofah fiber.

[0045] The modified bacterial cellulose is prepared as follows: Take 8 parts of urea, 16 parts of chlorobenzyl guanidine and 18 parts of citric acid by weight, mix them and heat to 40°C; add 30 parts of bacterial cellulose and 50 parts of glutaraldehyde, heat to 80°C and react for 2 hours; cool and dry to prepare modified bacterial cellulose.

[0046] The above-mentioned raw materials are mixed and stirred evenly, reacted for 2 hours, and stirred evenly again to obtain the final product.

[0047] Comparative Example 4

[0048] A wastewater treatment agent, characterized in that it is made from the following raw material components in parts by weight: 80 parts aluminum ash, 4 parts sodium hydroxide, 16 parts adsorbent, 15 parts diatomaceous earth, 4 parts silane coupling agent KH550, 6 parts aloe vera gel, 5 parts polyaspartic acid, and 150 parts water; wherein the adsorbent is a mixture of modified loofah fiber and modified bacterial cellulose in a mass ratio of 5:2.

[0049] The modified loofah fiber is prepared as follows: 8 parts hydrogen peroxide, 2 parts sodium chlorate, and 4 parts magnesium sulfate are added to 80 parts water according to the weight ratio, and stirred and mixed evenly to prepare an soaking solution; the loofah is immersed in the soaking solution for 3 hours; then the softened loofah is rinsed with clean water and allowed to stand and wash until neutral; the loofah is placed in a 3% sodium hydroxide aqueous solution for 20 minutes, then taken out and air-dried to prepare the modified loofah fiber.

[0050] The modified bacterial cellulose is prepared as follows: Take 8 parts of urea, 16 parts of chlorobenzyl guanidine and 18 parts of citric acid by weight, mix them and heat to 40°C; add 30 parts of bacterial cellulose and 50 parts of glutaraldehyde, heat to 80°C and react for 2 hours; cool and dry to prepare modified bacterial cellulose.

[0051] The above-mentioned raw materials are mixed and stirred evenly, reacted for 2 hours, and stirred evenly again to obtain the final product.

[0052] Experimental example:

[0053] Wastewater from an industrial park was selected as the test water. The initial CODcr of the test water was 5892 mg / L, ammonia nitrogen content was 1760 mg / L, suspended solids content was 0.88 g / L, total phosphorus content was 0.43 mg / L, and pH value was 8.5. The test water at a temperature of 15℃ was treated with the wastewater treatment agents of Examples 1-3 and Comparative Examples 1-4, respectively, and the dosage of the wastewater treatment agent was controlled at 1.5 g / L.

[0054] Statistical analysis was performed using SPSS 24.0 software. Quantitative data were expressed as mean ± standard deviation (x±s). The Kolmogorov-Smirnov test was used to test the normality of the data. For normally distributed data, the t-test was used to compare the differences in means between two groups. A p-value < 0.05 was considered statistically significant. The results are shown in Tables 1-2.

[0055] Table 1

[0056]

[0057] Note: * indicates that compared with Example 1 group, P<0.05.

[0058] Table 2

[0059]

[0060] Note: * indicates that compared with Example 1 group, P<0.05.

[0061] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A sewage treatment agent, characterized by comprising: The raw material components are prepared from the following components by weight: aluminum ash 50-100 parts, catalyst 1-5 parts, adsorbent 10-30 parts, filler 10-20 parts, silane coupling agent 3-5 parts, coagulant 3-8 parts, polyamino acid 3-6 parts, and water 100-200 parts; The catalyst is one or a mixture of several of sodium amino acid, sodium carbonate, sodium hydroxide, and potassium hydroxide; The adsorbent is a mixture of modified luffa sponge fibers and modified bacterial cellulose in a mass ratio of 5: (1-3); The preparation method of the modified luffa sponge fibers is as follows: 5-10 parts of hydrogen peroxide, 1-3 parts of sodium chlorate, and 2-6 parts of magnesium sulfate are added to 60-120 parts of water, stirred and mixed uniformly to form a soaking solution; the luffa sponge is immersed in the soaking solution for 2-4 hours; then the bleached and softened luffa sponge is washed with clean water and left to stand until neutral; the luffa sponge is placed in a 2-4% sodium hydroxide solution for 10-30 minutes, taken out and naturally dried to form the modified luffa sponge fibers; The preparation method of the modified bacterial cellulose is as follows: 6-12 parts of urea, 12-20 parts of chlorobenzene biguanide, and 12-25 parts of citric acid are mixed and heated to 30-50℃; 20-40 parts of bacterial cellulose and 30-60 parts of glutaraldehyde are added, and the temperature is raised to 70-90℃ for 1-3 hours; cooled and dried to form the modified bacterial cellulose.

2. The sewage treatment agent according to claim 1, characterized by The filler is one or a mixture of several of diatomite, attapulgite, dolomite powder, medical stone powder, activated carbon, rice husk ash, sepiolite powder, and perlite.

3. The sewage treatment agent according to claim 1, characterized by, The silane coupling agent is one or a mixture of several of silane coupling agent KH550, silane coupling agent KH560, silane coupling agent KH570, silane coupling agent KH792, and silane coupling agent DL602.

4. The sewage treatment agent according to claim 1, wherein The coagulant is a mixture of sodium alginate and aloe vera gel in a mass ratio of 3: (1-3).

5. The sewage treatment agent according to claim 1, wherein The polyamino acid is one or a mixture of several of polyalanine, polyaspartic acid, and polyproline.

6. The method of preparing the sewage treatment agent of claim 1, characterized by, The raw materials of claim 1 are mixed and stirred uniformly, reacted for 1-3 hours, stirred again uniformly, and formed.

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