Medium composite cleaning source for improving riverway water quality and preparation method thereof

Abstract

The invention relates to the technical field of riverway treatment, in particular to a medium composite cleaning source for improving riverway water quality and a preparation method thereof. The invention discloses a medium composite cleaning source for improving river water quality. The medium composite cleaning source is prepared from the following components in percentage by weight: 1-2% of an active biomass degradation source, 15-20% of aluminum oxide, 5-10% of bentonite, 15-20% of biomass porous carbon, 10-15% of diatomite, 5-10% of polyacrylamide, 15-20% of ferroferric oxide, 5-10% of sodium alginate and 2-5% of bamboo fiber. By combining two purification modes of physical adsorption of mineral substances and biodegradation of microorganisms, dual purification is formed, the water quality improvement effect is more remarkable and lasting, the water quality index is improved rapidly through collaborative purification, the source of a large number of used natural materials is wide, and the cost is low. And meanwhile, the treatment agent can be ensured not to generate secondary pollution in the whole service cycle.

Description

Technical Field

[0001] The present invention relates to the technical field of river treatment, and in particular to a medium composite cleaning source for improving river water quality and a preparation method thereof. Background Art

[0002] With the accelerated advancement of industrialization and urbanization, water pollution has gradually become a global environmental problem. Industrial wastewater, agricultural non-point source pollution, urban sewage, etc. have become the main sources of pollution, leading to eutrophication of water bodies, heavy metal pollution, and accumulation of toxic and harmful substances. These pollutions not only endanger the survival of aquatic organisms, but also directly affect the safety of human drinking water and even threaten the sustainability of global water resources. For the pollution problem of river water bodies, traditional water quality improvement methods have the problems of long treatment cycle, high cost and complex operation.

[0003] Publication No. CN118529809A discloses a comprehensive water quality improvement algae inhibitor and its preparation method and application, which can significantly remove algae polluting water bodies, but has poor effects on eutrophication and heavy metal pollution of water bodies; Publication No. CN114890535A discloses a composite environmentally friendly water purifier suitable for improving river and lake water quality and its preparation method, which uses physical adsorption and chemical precipitation methods to significantly remove toxic and harmful substances in water bodies, but has poor effects in dead water areas. Therefore, an efficient water quality improvement technology that can be used for a long time is needed, especially suitable for purification of static water bodies such as dead water areas and deep water areas.

[0004] In view of the above problems, the present invention provides a solution. Summary of the invention

[0005] The purpose of the present invention is to provide a medium composite cleaning source for improving river water quality and a preparation method thereof, which can clean static water bodies for a long time with high efficiency and low cost, is suitable for purification of dead water areas and deep water areas, and still has excellent cleaning effect in improving the quality of running water.

[0006] To achieve the above purpose, the present invention adopts the following technical scheme: a medium composite cleaning source for improving river water quality is composed of the following percentage components: 1-2% active biomass degradation source, 15-20% alumina, 5-10% bentonite, 15-20% biomass porous carbon, 10-15% diatomaceous earth, 5-10% polyacrylamide, 15-20% ferrosoferric oxide, 5-10% sodium alginate, 2-5% bamboo fiber;

[0007] The preparation method of biomass porous carbon comprises the following steps:

[0008] A1: Add the mixture of coconut shell, bark and straw into an ultrasonic cleaner, add deionized water, set the ultrasonic frequency to 80-100kHz, and perform ultrasonic cleaning for 15-20 minutes. After the ultrasonic cleaning is completed, transfer the mixture of coconut shell, bark and straw into an oven, set the oven wind speed to 1.5m / s, and dry it at 60°C for 1-2 hours to make the moisture content of the mixture of coconut shell, bark and straw 3%. Finally, add the mixture of coconut shell, bark and straw into a crusher, set the crushing particle size to 200 mesh, and crush it for 30 minutes before filtering it through a 200-mesh filter to obtain biomass crushed material.

[0009] A2: Mix the biomass crushed material and potassium hydroxide and add them into a magnetic stirrer. Set the speed of the magnetic stirrer to 500-600 rpm, stir and mix for 15-20 minutes, and then add 15% concentration of phosphoric acid into the magnetic stirrer to obtain activated biomass crushed material;

[0010] A3: Add the activated biomass crushed material into the pyrolysis furnace, introduce carbon dioxide into the pyrolysis furnace, use carbon dioxide to adjust the pyrolysis furnace pressure to 1.6-1.8atm, and heat up the pyrolysis at the same time. Set the pyrolysis furnace heating program to increase the temperature by 25°C per minute to 450°C, and maintain 450°C for 30 minutes after the heating is completed. After the insulation is completed, adjust the pyrolysis furnace heating program to increase the temperature by 30°C per minute to 900°C. After the heating is completed, introduce air into the pyrolysis furnace, and slowly release carbon dioxide, keep the pressure in the pyrolysis furnace unchanged, and maintain the temperature at 900°C for 30 minutes to obtain biomass pyrolysis charcoal;

[0011] A4: Use deionized water to wash the biomass pyrolytic carbon. After washing, add the biomass pyrolytic carbon into a crusher, set the crusher mesh size to 1000 mesh, crush for 30 minutes, then pass through a 1000 mesh filter screen, add the biomass pyrolytic carbon that has not passed the filter screen back into the crusher and repeat the crushing once, then pass through a 1000 mesh filter screen, collect the 1000 mesh filter screen to obtain the biomass porous carbon.

[0012] Furthermore, in step A1, the mass ratio of coconut shell, bark and straw in the mixture of coconut shell, bark and straw is 1:3:6; the mass ratio of the mixture of coconut shell, bark and straw and deionized water in step A1 is 1:2; the volume ratio of carbon dioxide and air in step A3 is 1:9; the mass ratio of biomass crushed material, potassium hydroxide and 15% concentration phosphoric acid in step A2 is 4:1:5.

[0013] Furthermore, a method for preparing a medium composite cleaning source for improving river water quality comprises the following steps:

[0014] B1: Add bentonite and diatomaceous earth into a grinder, set the grinding particle size to 800 mesh, grind for 30 minutes, then pass through an 800-mesh filter sieve, add the particles that do not pass through the filter sieve back into the grinder and grind once, collect the product filtered through the 800-mesh filter sieve, then mix the biomass porous carbon and the product filtered through the 800-mesh filter sieve, add them into a magnetic stirrer, set the stirring rate to 600-800 rpm, and stir and mix for 30 minutes to obtain mixed carbon soil;

[0015] B2: Add mixed carbon soil, aluminum oxide, ferrosoferric oxide and sodium alginate into a reactor, set the speed of the magnetic stirrer to 800-1000 rpm and heat to 45-50°C, stir and mix for 10 minutes, then add polyacrylamide and bamboo fiber, heat to 55-60°C and stir and mix for 30 minutes to obtain a physical adsorption composition;

[0016] B3: The physical adsorption composition and the active biomass degradation source are mixed and added into a homogenizer, and homogenized for 30 minutes. After the homogenization is completed, a composite cleaning medium is obtained, and then the composite cleaning medium is transferred to a polyvinyl alcohol film, and the polyvinyl alcohol film is sealed with a methylcellulose adhesive to obtain a composite cleaning source;

[0017] B4: Heat the bio-based polyethylene to 120-130°C, then melt the bio-based polyethylene into a flowable liquid, add the bio-based polyethylene into a porous spherical mold prepared in advance, wait for it to cool to room temperature to obtain a porous spherical shell, place the composite cleaning source into the porous spherical shell to obtain a medium composite cleaning source for improving river water quality.

[0018] Furthermore, the active biomass degradation source is a mixed bacteria of Nitromonas, Bacillus subtilis, Bacillus, Rhizobium and Acinetobacter baumannii, and the mass ratio thereof is 1:1:1:1:1; the ferroferric oxide is a black powder of ferroferric oxide powder with a specification of 1000 mesh; the sodium alginate is a white sodium alginate powder with a specification of 600 mesh; and the bamboo fiber is a solid bamboo fiber powder with a specification of 100 mesh.

[0019] In summary, due to the adoption of the above-mentioned technical scheme, the beneficial effect of the present invention is that the present invention forms a double purification by combining the two purification methods of physical adsorption of minerals and biodegradation of microorganisms, so that the water quality improvement effect is more significant and lasting. The minerals not only provide a strong adsorption capacity, which can remove harmful substances and soluble pollutants in the water, but also effectively regulate the pH value of the water body, thereby enhancing the stability of the water quality. The microorganisms further decompose the organic pollutants in the water through their metabolic activities during the purification process, thereby greatly improving the efficiency of water purification. The coordinated purification not only makes the improvement of water quality indicators rapid, but also the natural materials used in the present invention are widely available, and at the same time can ensure that the treatment agent will not cause secondary pollution during the entire use cycle. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments.

[0021] The experimental methods in the following examples, unless otherwise specified, are conventional methods, and are performed according to the techniques or conditions described in the literature in the field or according to the product instructions. The materials and reagents used in the following examples, unless otherwise specified, can be obtained from commercial channels.

[0022] Example 1

[0023] 1: 1kg coconut shell, 3kg bark and 6kg straw were mixed and added to an ultrasonic cleaner, 20kg deionized water was added, the ultrasonic frequency was set to 100kHz, and ultrasonic cleaning was performed for 20min. After ultrasonic cleaning, the coconut shell, bark and straw mixture was transferred to an oven, the oven wind speed was set to 1.5m / s, and the temperature was set to 60℃ for drying for 2h to make the moisture content of the coconut shell, bark and straw mixture 3%. Finally, the coconut shell, bark and straw mixture was added to a crusher, the crushing particle size was set to 200 mesh, and after crushing for 30min, 2kg of biomass crushed material was obtained by filtering through a 200-mesh filter sieve;

[0024] 2: 2 kg of biomass crushed material and 500 g of potassium hydroxide were mixed into a magnetic stirrer, the speed of the magnetic stirrer was set to 600 rpm, and the mixture was stirred for 20 min. Subsequently, 2.5 kg of 15% phosphoric acid was added into the magnetic stirrer to obtain activated biomass crushed material;

[0025] 3: Add the activated biomass crushed material into the pyrolysis furnace, introduce carbon dioxide into the pyrolysis furnace, use carbon dioxide to adjust the pyrolysis furnace pressure to 1.8atm, and heat up for pyrolysis at the same time. Set the pyrolysis furnace heating program to increase the temperature by 25℃ per minute, increase the temperature to 450℃, and maintain 450℃ for 30min after the heating is completed. After the insulation is completed, adjust the pyrolysis furnace heating program to increase the temperature by 30℃ per minute, and increase the temperature to 900℃. After the heating is completed, introduce air into the pyrolysis furnace, and slowly release carbon dioxide at the same time, so that the volume ratio of air and carbon dioxide in the pyrolysis furnace is 1:9, keep the pressure in the pyrolysis furnace unchanged, and keep the temperature at 900℃ for 30min to obtain 1.4kg of biomass pyrolysis charcoal;

[0026] 4: Use deionized water to wash the biomass pyrolytic charcoal. After washing, add the biomass pyrolytic charcoal to a crusher, set the crusher mesh number to 1000 mesh, crush for 30 minutes, and then pass through a 1000-mesh filter sieve. The biomass pyrolytic charcoal that does not pass through the filter sieve is re-added to the crusher and crushed once again, and then passed through a 1000-mesh filter sieve. Collect the 1000-mesh filter sieve to filter the product to obtain 900 g of the biomass porous charcoal prepared in Example 1.

[0027] Table 1, reagent parameters used in Example 1

[0028] Drug Name source model parameter Potassium hydroxide Aladdin P112287 500g Phosphoric acid Aladdin P123765 4L

[0029] Example 2

[0030] 1: 2kg coconut shell, 6kg bark and 12kg straw were mixed and added to an ultrasonic cleaner, deionized water was added, the ultrasonic frequency was set to 80kHz, and ultrasonic cleaning was performed for 20 minutes. After the ultrasonic cleaning was completed, the cottonseed hull was transferred to an oven, the wind speed of the oven was set to 1.5m / s, and the temperature was set to 60°C for drying for 1.5h to make the moisture content of the coconut shell, bark and straw mixture 3%. Finally, the coconut shell, bark and straw mixture was added to a crusher, the crushing particle size was set to 200 mesh, and after crushing for 30 minutes, 4kg of biomass crushed material was obtained through a 200-mesh filter sieve;

[0031] 2: 4 kg of biomass crushed material and 1 kg of potassium hydroxide were mixed and added to a magnetic stirrer, the speed of the magnetic stirrer was set to 600 rpm, and the mixture was stirred for 20 min. Subsequently, 5 kg of 15% phosphoric acid was added to the magnetic stirrer to obtain activated biomass crushed material;

[0032] 3: Add the activated biomass crushed material into the pyrolysis furnace, introduce carbon dioxide into the pyrolysis furnace, use carbon dioxide to adjust the pyrolysis furnace pressure to 1.6atm, and heat up for pyrolysis at the same time. Set the pyrolysis furnace heating program to increase the temperature by 25℃ per minute, increase the temperature to 450℃, and maintain 450℃ for 30min after the heating is completed. After the insulation is completed, adjust the pyrolysis furnace heating program to increase the temperature by 30℃ per minute, and increase the temperature to 900℃. After the heating is completed, introduce air into the pyrolysis furnace, and slowly release carbon dioxide at the same time, so that the volume ratio of air and carbon dioxide in the pyrolysis furnace is 1:9, keep the pressure in the pyrolysis furnace unchanged, and keep the temperature at 900℃ for pyrolysis for 30min to obtain 3kg of biomass pyrolysis charcoal;

[0033] 4: Use deionized water to wash the biomass pyrolytic charcoal. After washing, add the biomass pyrolytic charcoal to a crusher, set the crusher mesh number to 1000 mesh, crush for 30 minutes, and then pass through a 1000-mesh filter sieve. The biomass pyrolytic charcoal that does not pass through the filter sieve is re-added to the crusher and crushed once again, and then passed through a 1000-mesh filter sieve. Collect the 1000-mesh filter sieve to filter the product to obtain 2.1 kg of the biomass porous charcoal prepared in Example 2.

[0034] Table 2, reagent parameters used in Example 2

[0035] Drug Name source model parameter Potassium hydroxide Aladdin P112287 500g Phosphoric acid Aladdin P123765 4L

[0036] Example 3

[0037] 1: Add 100g of bentonite and 150g of diatomaceous earth into a grinder, set the grinding particle size to 800 mesh, grind for 30min, then pass through an 800-mesh filter sieve, add the particles that do not pass through the filter sieve back into the grinder and grind once, collect the product filtered through the 800-mesh filter sieve, then mix 200g of the biomass porous charcoal prepared in Example 1 with the product filtered through the 800-mesh filter sieve, add them into a magnetic stirrer, set the stirring rate to 800rpm, and stir and mix for 30min to obtain a mixed charcoal soil;

[0038] 2: Add mixed carbon soil, 200g alumina, 200g ferrosoferric oxide and 100g sodium alginate into a reactor, set the magnetic stirrer speed to 1000rpm and heat to 50°C, stir and mix for 10min, then add 100g polyacrylamide and 50g bamboo fiber, heat to 60°C and stir and mix for 30min to obtain a physical adsorption composition;

[0039] 3: The physical adsorption composition was mixed with 4g of Nitromonas, 4g of Bacillus subtilis, 4g of Bacillus, 4g of Rhizobium and 4g of Acinetobacter baumannii, and added into a homogenizer for homogenization for 30 minutes. After homogenization, a composite cleaning medium was obtained. The composite cleaning medium was then transferred into a polyvinyl alcohol film, and the polyvinyl alcohol film was sealed with a methylcellulose adhesive to obtain a composite cleaning source;

[0040] 4: Heat the bio-based polyethylene to 130°C, then melt the bio-based polyethylene into a flowable liquid, add the bio-based plastic into a porous spherical mold prepared in advance, and after cooling it to room temperature, obtain a porous spherical shell, and place the composite cleaning source into the porous spherical shell to obtain a medium composite cleaning source for improving river water quality as prepared in Example 3.

[0041] Table 3, reagent parameters used in Example 3

[0042]

[0043]

[0044] Example 4

[0045] 1: Add 50g of bentonite and 100g of diatomaceous earth into a grinder, set the grinding particle size to 800 mesh, grind for 30min, then pass through an 800-mesh filter sieve, add the particles that do not pass through the filter sieve back into the grinder and grind once, collect the product filtered through the 800-mesh filter sieve, then mix 150g of the biomass porous charcoal prepared in Example 2 with the product filtered through the 800-mesh filter sieve, add them into a magnetic stirrer, set the stirring rate to 600rpm, and stir and mix for 30min to obtain a mixed charcoal soil;

[0046] 2: Add mixed carbon soil, 150g alumina, 150g ferrosoferric oxide and 50g sodium alginate into a reactor, set the magnetic stirrer speed to 1000rpm and heat to 50°C, stir and mix for 10min, then add 50g polyacrylamide and 20g bamboo fiber, heat to 55°C and stir and mix for 30min to obtain a physical adsorption composition;

[0047] 3: The physical adsorption composition was mixed with 2g of Nitromonas, 2g of Bacillus subtilis, 2g of Bacillus, 2g of Rhizobium and 2g of Acinetobacter baumannii, and added into a homogenizer for homogenization for 30 minutes. After homogenization, a composite cleaning medium was obtained. The composite cleaning medium was then transferred into a polyvinyl alcohol film, and the hydrolyzed film was sealed with a methylcellulose adhesive to obtain a composite cleaning source;

[0048] 4: Heat the bio-based polyethylene to 125°C, then melt the bio-based polyethylene into a flowable liquid, add the bio-based plastic into a porous spherical mold prepared in advance, wait for it to cool to room temperature to obtain a porous spherical shell, and place the composite cleaning source into the porous spherical shell to obtain a medium composite cleaning source for improving river water quality as prepared in Example 4.

[0049] Table 4, reagent parameters used in Example 4

[0050] Drug Name source model parameter Bentonite Shijiazhuang Zhengyu New Materials Co., Ltd. 20230512 800 mesh diatomite Lingshou County Shuanglong Mining Co., Ltd. Gzt05 2kg Alumina Shanghai Jiuye International Trade Co., Ltd. 254936917 1kg Ferroferric oxide Shandong Aofite New Materials Co., Ltd. 2-1000 5kg Sodium alginate Jiangsu Changjing Bioengineering Co., Ltd. 101 5kg Polyacrylamide Gongyi Xinqi Chemical Factory 20210916 5kg Bamboo Fiber Changxing Tianhe Building Materials Co., Ltd. TH-014 5kg Nitromonas Baosai Biotechnology 19718 <![CDATA[10 6 cfu]]> Bacillus subtilis Shanghai Shifeng Biotechnology SJ01199 <![CDATA[10 6 cfu]]> Bacillus Mingzhou Biotechnology B80469 <![CDATA[10 6 cfu <!-- 5 -->]]> Rhizobium Mingzhou Biotechnology B81562 <![CDATA[10 6 cfu]]> Acinetobacter baumannii Warner Biotech 01266L <![CDATA[10 6 cfu]]>

[0051] Comparative Example 1

[0052] Example 4 with publication number CN118529809A was selected as comparative example 1.

[0053] Comparative Example 2

[0054] Example 1 with publication number CN114890535A was selected as comparative example 2.

[0055] River cleaning experiment

[0056] Xiaoyan River in Neixiang County, Nanyang City, Henan Province was selected as the river test site, and the polluted area in the middle reaches of Xiaoyan River was selected as the test site. The 40m river width was evenly divided into 8m diversion channels using a dam, and the dam length was 200m. The total river was divided into 4 groups of diversion channels with a length of 200m and a width of 8m. The composite clean source prepared in Example 3, the composite clean source prepared in Example 4, Comparative Example 1 and Comparative Example 2 were respectively put into the 4 groups of rivers, with an input amount of one thousandth of the water flow rate, for 60 days, and the pollutant cleaning conditions of the diversion channels were recorded after 60 days.

[0057] Table 5. Results of river cleaning experiment

[0058]

[0059] By analyzing Table 5, it can be seen that the composite cleaning source prepared in Example 3 and Example 4 can significantly improve the phosphorus, ammonia nitrogen and suspended matter pollution in the polluted river, and at the same time can significantly reduce the chemical oxygen demand of the river, and can effectively remove microorganisms and floating algae in the polluted river, thereby significantly improving the transparency of the polluted river.

[0060] Dead water cleaning experiment

[0061] A seriously polluted artificial lake was selected, and an intercepting dam was used to divide the artificial lake into four small artificial lakes with a length of 15 m, a width of 6 m, and a depth of 8 m. The composite clean source prepared in Example 3, the composite clean source prepared in Example 4, Comparative Example 1 and Comparative Example 2 were respectively put into the lakes, with the amount of the input being one thousandth of the dead water content. The lakes were left to stand for 60 days, and the water quality was tested.

[0062] Table 6, Dead water cleaning test results

[0063]

[0064]

[0065] By analyzing Table 6, it can be seen that the cleaning effect of traditional water purifiers in dead water areas is greatly reduced due to the lack of water flow. On the contrary, the cleaning sources prepared in Examples 3 and 4 can effectively clean phosphorus, ammonia nitrogen and suspended solids pollution in dead water areas through the multiple effects of physical adsorption, chemical precipitation and biological decomposition, and have obvious advantages in cleaning artificial landscapes.

[0066] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A composite cleaning medium source for improving river water quality, characterized in that: The invention is composed of the following percentage ingredients: 1-2% active biomass degradation source, 15-20% alumina, 5-10% bentonite, 15-20% biomass porous carbon, 10-15% diatomaceous earth, 5-10% polyacrylamide, 15-20% ferrosoferric oxide, 5-10% sodium alginate, and 2-5% bamboo fiber; The preparation method of biomass porous carbon comprises the following steps: A1: Add the mixture of coconut shell, bark and straw into an ultrasonic cleaner, add deionized water, set the ultrasonic frequency to 80-100kHz, and perform ultrasonic cleaning for 15-20 minutes. After the ultrasonic cleaning is completed, transfer the mixture of coconut shell, bark and straw into an oven, set the oven wind speed to 1.5m / s, and dry it at 60°C for 1-2 hours to make the moisture content of the mixture of coconut shell, bark and straw 3%. Finally, add the mixture of coconut shell, bark and straw into a crusher, set the crushing particle size to 200 mesh, and crush it for 30 minutes before filtering it through a 200-mesh filter to obtain biomass crushed material. A2: Mix the biomass crushed material and potassium hydroxide and add them into a magnetic stirrer. Set the speed of the magnetic stirrer to 500-600 rpm, stir and mix for 15-20 minutes, and then add 15% concentration of phosphoric acid into the magnetic stirrer to obtain activated biomass crushed material; A3: Add the activated biomass crushed material into the pyrolysis furnace, introduce carbon dioxide into the pyrolysis furnace, use carbon dioxide to adjust the pyrolysis furnace pressure to 1.6-1.8atm, and heat up the pyrolysis at the same time. Set the pyrolysis furnace heating program to increase the temperature by 25°C per minute to 450°C, and maintain 450°C for 30 minutes after the heating is completed. After the insulation is completed, adjust the pyrolysis furnace heating program to increase the temperature by 30°C per minute to 900°C. After the heating is completed, introduce air into the pyrolysis furnace, and slowly release carbon dioxide, keep the pressure in the pyrolysis furnace unchanged, and maintain the temperature at 900°C for 30 minutes to obtain biomass pyrolysis charcoal; A4: Use deionized water to wash the biomass pyrolytic carbon. After washing, add the biomass pyrolytic carbon into a crusher, set the crusher mesh size to 1000 mesh, crush for 30 minutes, then pass through a 1000 mesh filter screen, add the biomass pyrolytic carbon that has not passed the filter screen back into the crusher and repeat the crushing once, then pass through a 1000 mesh filter screen, collect the 1000 mesh filter screen to obtain the biomass porous carbon.

2. A composite cleaning medium source for improving river water quality according to claim 1, characterized in that: The mass ratio of coconut shell, bark and straw in the mixture of coconut shell, bark and straw in step A1 is 1:3:

6.

3. A composite cleaning medium source for improving river water quality according to claim 1, characterized in that: In step A1, the mass ratio of the coconut shell, bark, straw mixture and deionized water is 1:

2.

4. A composite cleaning medium source for improving river water quality according to claim 1, characterized in that: The volume ratio of carbon dioxide to air in step A3 is 1:

9.

5. A composite cleaning medium source for improving river water quality according to claim 1, characterized in that: In step A2, the mass ratio of the biomass crushed material, potassium hydroxide and 15% concentration phosphoric acid is 4:1:

5.

6. A composite cleaning medium source for improving river water quality according to claim 1, characterized in that: The active biomass degradation source is a mixed bacterial body of Nitromonas, Bacillus subtilis, Bacillus, Rhizobium and Acinetobacter baumannii, and the mass ratio thereof is 1:1:1:1:1:

1.

7. A composite cleaning medium source for improving river water quality according to claim 1, characterized in that: The ferroferric oxide is a black powder of ferroferric oxide with a specification of 1000 meshes.

8. A composite medium cleaning source for improving river water quality according to claim 1, characterized in that: The sodium alginate is white sodium alginate powder with a specification of 600 meshes.

9. A composite cleaning medium source for improving river water quality according to claim 1, characterized in that: The bamboo fiber is solid bamboo fiber powder with a specification of 100 meshes.

10. The method for preparing a composite cleaning medium source for improving river water quality according to claim 1, characterized in that: The following steps are involved: B1: Add bentonite and diatomaceous earth into a grinder, set the grinding particle size to 800 mesh, grind for 30 minutes, then pass through an 800-mesh filter sieve, add the particles that do not pass through the filter sieve back into the grinder and grind once, collect the product filtered through the 800-mesh filter sieve, then mix the biomass porous carbon and the product filtered through the 800-mesh filter sieve, add them into a magnetic stirrer, set the stirring rate to 600-800 rpm, and stir and mix for 30 minutes to obtain mixed carbon soil; B2: Add mixed carbon soil, aluminum oxide, ferrosoferric oxide and sodium alginate into a reactor, set the speed of the magnetic stirrer to 800-1000 rpm and heat to 45-50°C, stir and mix for 10 minutes, then add polyacrylamide and bamboo fiber, heat to 55-60°C and stir and mix for 30 minutes to obtain a physical adsorption composition; B3: The physical adsorption composition and the active biomass degradation source are mixed and added into a homogenizer, and homogenized for 30 minutes. After the homogenization is completed, a composite cleaning medium is obtained, and then the composite cleaning medium is transferred to a polyvinyl alcohol film, and the polyvinyl alcohol film is sealed with a methylcellulose adhesive to obtain a composite cleaning source; B4: Heat the bio-based polyethylene to 120-130°C, then melt the bio-based polyethylene into a flowable liquid, add the bio-based polyethylene into a porous spherical mold prepared in advance, wait for it to cool to room temperature to obtain a porous spherical shell, place the composite cleaning source into the porous spherical shell to obtain a medium composite cleaning source for improving river water quality.

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