1. A preparation method of a cement-based material with a water purification function is characterized by comprising the following steps: the method comprises the following steps:

(1) preparing a porous carrier:

grinding the purified and deposited sludge, fly ash, ferroferric oxide, attapulgite and sodium bicarbonate, adding water for mixing, and granulating to obtain spherical particles;

drying and roasting the spherical particles to obtain a porous carrier;

(2) preparing a cement-based material:

culturing pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter respectively, adding an efficient transforming agent, and spray-drying to obtain the bacillus powder of the pseudomonas aeruginosa, the bacillus thuringiensis and the arthrobacter; taking and mixing the bacillus powder of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter to obtain a composite microbial inoculum;

mixing the composite microbial inoculum with a porous carrier to obtain a composite, and mixing the composite with sand to prepare fine aggregate; mixing cement, fine aggregate and water to prepare the cement-based material.

2. The method for preparing the cement-based material with the water purifying function according to claim 1, wherein the method comprises the following steps: the method comprises the following steps:

(1) preparing a porous carrier:

grinding the purified and deposited sludge, fly ash, ferroferric oxide, attapulgite and sodium bicarbonate into powder, adding water, mixing into slurry, and granulating to obtain spherical particles with the particle size of 2-5 mm;

drying and preheating spherical particles, wherein the preheating process comprises the following steps: preheating at 190-210 ℃ for 10-15 m, roasting, and naturally cooling to normal temperature to obtain a porous carrier;

(2) preparing a cement-based material:

inoculating pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter to a culture medium respectively, culturing at a constant temperature for 24-48 h, adding a high-efficiency transforming agent, and performing spray drying to obtain bacillus powder of the pseudomonas aeruginosa, the bacillus thuringiensis and the arthrobacter;

mixing the bacillus powders of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter to obtain a composite microbial inoculum;

uniformly mixing the composite microbial inoculum and a porous carrier, and fully mixing under a negative pressure condition for 30-50 min to obtain a compound; mixing the compound with sand to prepare fine aggregate; mixing cement, fine aggregate and water to prepare the cement-based material.

3. The method for preparing the cement-based material with the water purifying function according to claim 2, wherein the method comprises the following steps: the mass ratio of the purified and deposited sludge, the fly ash, the ferroferric oxide, the attapulgite, the sodium bicarbonate and the water in the step (1) is 100: (5-20): (1-5): (5-20): (1-10): (10-50).

4. The method for preparing the cement-based material with the water purifying function according to claim 2, wherein the method comprises the following steps: the drying process in the step (1) comprises the following steps: the drying temperature is 90-110 ℃, the drying time is 12-24 h, and the roasting process is as follows: the roasting temperature is 1080-1120 ℃, and the roasting time is 10-30 min.

5. The method for preparing the cement-based material with the water purifying function according to claim 2, wherein the method comprises the following steps: the culture medium in the step (2) comprises the following components in parts by weight: 1000mL of deionized water, 5-10 g of peptone, 1-3 g of yeast and 1-5 g of beef extract; the efficient transforming agent is manganese chloride, and the adding amount of the efficient transforming agent is 1-5 g/L; the spray drying process comprises the following steps: the temperature is 105-110 ℃, and the speed is 5-20 mL/min.

6. The method for preparing the cement-based material with the water purifying function according to claim 2, wherein the method comprises the following steps: the mass ratio of the composite microbial inoculum to the porous carrier in the step (2) is (1-10): 100, respectively; the mass ratio of the bacillus powder of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter in the composite microbial inoculum is (1-1.5): (1-1.5): 2; the mass ratio of the cement to the fine aggregate to the water is 2: 6: 1, the weight ratio of the compound in the fine aggregate is 1-15%.

7. The method for preparing the cement-based material with the water purifying function according to claim 2, wherein the method comprises the following steps: the ferroferric oxide in the step (1) is prepared by the following process:

adding ferrous sulfate and ferric sulfate into deionized water, stirring for 13-17 min at the temperature of 42-48 ℃, adding ammonia water to adjust the pH of the system to 10.8-11.5, and washing the precipitate to be neutral; adding deionized water and calcium oxide, carrying out ultrasonic treatment for 20-30 min, adding aluminum chloride, carrying out ultrasonic reaction for 120-150 min, standing for 40-60 min, taking out precipitate, washing, drying and filtering to obtain ferroferric oxide.

8. The method for preparing the cement-based material with the water purifying function according to claim 2, wherein the method comprises the following steps: the step (2) comprises the following preparation process:

inoculating pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter to a culture medium respectively, culturing at a constant temperature for 24-48 h, adding a high-efficiency transforming agent, and performing spray drying to obtain bacillus powder of the pseudomonas aeruginosa, the bacillus thuringiensis and the arthrobacter;

uniformly mixing manganese chloride and 2-quinolinecarboxylic acid, circularly reacting for 8-15 min at the airflow velocity of 1000-1200 g/min under the pressure of 1.2-1.8 MPa, washing with deionized water and absolute ethyl alcohol, and vacuum drying at 55-65 ℃ for 12 h; heating to 450-500 ℃ at a heating rate of 4-6/min, preserving heat for 40-60 min, naturally cooling to room temperature, washing with absolute ethyl alcohol, and drying; mixing with bacillus powder of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter, heating to 60-80 ℃ at a heating rate of 4-6/min, and keeping the temperature for 20-30 min to obtain a composite microbial inoculum;

uniformly mixing the composite microbial inoculum and a porous carrier, fully mixing under a negative pressure condition for 30-50 min to obtain a compound, and mixing the compound and sand to prepare fine aggregate; mixing cement, fine aggregate and water to prepare the cement-based material.

9. A water purification cement-based material produced by the method for producing a water purification cement-based material according to any one of claims 1 to 8.

10. The use of a cement-based material with water purification function according to claim 9 in the field of sewage treatment.

Background

With the improvement of the social and economic level, the basic living conditions of people are improved, and tap water as an important living substance for human life has direct influence on the normal life and the body health of people. In order to ensure the safety of tap water and ensure that safe and high-quality tap water is provided for people, the treatment of tap water is an extremely critical link. In the case of domestic water (or urban public water supply), raw water from a high-quality water source (well water or a well-protected water supply dedicated reservoir) is simply disinfected to obtain finished water; taking raw water from a common river or lake, removing turbid impurities such as silt and the like, and then disinfecting; the raw water with serious pollution needs to be removed with pollutants such as organic matters; raw water containing iron and manganese (such as some well water) needs to be removed with iron and manganese. Domestic water can meet the water quality requirements of common industrial water, but the industrial water sometimes needs further processing, such as softening, desalting and the like. At present, the sewage treatment generally comprises the following three stages: the first-stage treatment is that stones, gravels, fat, iron ions, manganese ions, grease and the like contained in the sewage are removed through mechanical treatment such as grating, sedimentation or air flotation; the secondary treatment is biological treatment, and pollutants in the sewage are degraded and converted into sludge under the action of microorganisms; tertiary treatment is the advanced treatment of wastewater, which involves nutrient removal and disinfection of the wastewater by chlorination, ultraviolet radiation, or ozone techniques. Some sewage treatment processes do not include all of the above processes, depending on the purpose of treatment and the quality of water. The method has an obvious effect on sewage purification, but the problems of high cost, complex process, long period and the like generally exist, and the research and development of new materials and new technologies with excellent purification effect, convenient process and low price are urgently needed. Therefore, a cement-based material with a water purification function, a preparation method and application thereof are provided.

Disclosure of Invention

The invention aims to provide a cement-based material with a water purification function, and a preparation method and application thereof, so as to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme: a cement-based material with a water purification function and a preparation method and application thereof comprise the following steps:

(1) preparing a porous carrier:

grinding the purified and deposited sludge, fly ash, ferroferric oxide, attapulgite and sodium bicarbonate, adding water for mixing, and granulating to obtain spherical particles;

drying and roasting the spherical particles to obtain a porous carrier;

(2) preparing a cement-based material:

culturing pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter respectively, adding an efficient transforming agent, and spray-drying to obtain the bacillus powder of the pseudomonas aeruginosa, the bacillus thuringiensis and the arthrobacter; taking and mixing the bacillus powder of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter to obtain a composite microbial inoculum;

mixing the composite microbial inoculum with a porous carrier to obtain a composite, and mixing the composite with sand to prepare fine aggregate; mixing cement, fine aggregate and water to prepare the cement-based material.

Further, the method comprises the following steps:

(1) preparing a porous carrier:

grinding the purified and deposited sludge, fly ash, ferroferric oxide, attapulgite and sodium bicarbonate into powder, adding water, mixing into slurry, and granulating to obtain spherical particles with the particle size of 2-5 mm;

drying and preheating spherical particles, wherein the preheating process comprises the following steps: preheating at 190-210 ℃ for 10-15 m, roasting, and naturally cooling to normal temperature to obtain a porous carrier;

(2) preparing a cement-based material:

inoculating pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter to a culture medium respectively, culturing at a constant temperature for 24-48 h, adding a high-efficiency transforming agent, and performing spray drying to obtain bacillus powder of the pseudomonas aeruginosa, the bacillus thuringiensis and the arthrobacter;

mixing the bacillus powders of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter to obtain a composite microbial inoculum;

uniformly mixing the composite microbial inoculum and a porous carrier, fully mixing under a negative pressure condition for 30-50 min to obtain a compound, and mixing the compound and sand to prepare fine aggregate; mixing cement, fine aggregate and water to prepare the cement-based material.

Further, the mass ratio of the purified and deposited sludge, the fly ash, the ferroferric oxide, the attapulgite, the sodium bicarbonate and the water in the step (1) is 100: (5-20): (1-5): (5-20): (1-10): (10-50).

Further, the drying process in the step (1) comprises the following steps: the drying temperature is 90-110 ℃, the drying time is 12-24 h, and the roasting process is as follows: the roasting temperature is 1080-1120 ℃, and the roasting time is 10-30 min.

Further, the culture medium in the step (2) comprises the following components by weight: 1000mL of deionized water, 5-10 g of peptone, 1-3 g of yeast and 1-5 g of beef extract; the efficient transforming agent is manganese chloride, and the adding amount of the efficient transforming agent is 1-5 g/L; the spray drying process comprises the following steps: the temperature is 105-110 ℃, and the speed is 5-20 mL/min.

Further, the mass ratio of the composite microbial inoculum to the porous carrier in the step (2) is (1-10): 100, respectively; the mass ratio of the bacillus powder of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter in the composite microbial inoculum is (1-1.5): (1-1.5): 2; the mass ratio of the cement to the fine aggregate to the water is 2: 6: 1, the weight ratio of the compound in the fine aggregate is 1-15%.

In the technical scheme, the purified and deposited sludge, the fly ash, the ferroferric oxide, the attapulgite and the sodium bicarbonate are ground, mixed with water, granulated, dried and roasted, wherein the sodium bicarbonate generates carbon dioxide in roasting, and the granulated spherical particles are subjected to pore-making to prepare the porous carrier;

culturing pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter to prepare spore powder, pumping out air in pores of the porous carrier under the negative pressure condition, allowing the spore powder to enter the pores to prepare a cement-based material, replacing part of fine aggregate, adding concrete, and applying the cement-based material to the construction of a sewage treatment tank; when the sewage treatment tank is used, the cement-based material is contacted with sewage, the pseudomonas aeruginosa in the composite microbial inoculum can degrade macromolecular organic matters in the sewage to obtain micromolecular organic matters, the bacillus thuringiensis decomposes the micromolecules into carbon dioxide and water, and the arthrobacter accelerates the hydration reaction between the carbon dioxide and the water to form carbonate ions; the sewage treatment device is characterized in that the adsorption effect of pores in the sewage treatment pool and the cement-based material is utilized, the magnetic attraction of ferroferric oxide and attapulgite in the cement-based material component is realized, the electronegativity of the composite microbial inoculum attracts heavy metal ions in the sewage, so that the generated carbonate ions are in contact reaction with the heavy metal ions to form carbonate minerals, and the carbonate minerals are fixed in the pores of the cement-based material and the sewage treatment pool to realize the sewage treatment.

Further, the ferroferric oxide in the step (1) is prepared by the following process:

adding ferrous sulfate and ferric sulfate into deionized water, stirring for 13-17 min at the temperature of 42-48 ℃, adding ammonia water to adjust the pH of the system to 10.8-11.5, and washing the precipitate to be neutral; adding deionized water and calcium oxide, carrying out ultrasonic treatment for 20-30 min, adding aluminum chloride, carrying out ultrasonic reaction for 120-150 min, standing for 40-60 min, taking out precipitate, washing, drying and filtering to obtain ferroferric oxide.

Wherein the molar mass of the ferrous sulfate and the ferric sulfate is the same, the molar mass ratio of the ferric ions to the calcium oxide is 2:3, and the molar mass ratio of the aluminum chloride to the calcium oxide is 1: 3; mixing magnetic material ferroferric oxide particles generated by ferrous sulfate and ferric sulfate with aluminum chloride and calcium oxide in deionized water to prepare a magnetic material with hydrotalcite structure performance; after being roasted as a component of the porous carrier, the layered structure of the porous carrier is kept, so that the specific surface area of the prepared porous carrier can be increased, the adsorption of organic matters in sewage is promoted, carbon dioxide in the environment can be adsorbed, the formation acceleration of carbonate ions is promoted, and the sewage treatment efficiency is improved; and the prepared cement-based material can adsorb carbon dioxide in a system when being mixed with fine aggregate to prepare a sewage treatment tank, so that the anti-carbonization performance of the prepared concrete is improved.

Further, the step (2) comprises the following preparation processes:

inoculating pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter to a culture medium respectively, culturing at a constant temperature for 24-48 h, adding a high-efficiency transforming agent, and performing spray drying to obtain bacillus powder of the pseudomonas aeruginosa, the bacillus thuringiensis and the arthrobacter;

uniformly mixing manganese chloride and 2-quinolinecarboxylic acid, circularly reacting for 8-15 min at the airflow velocity of 1000-1200 g/min under the pressure of 1.2-1.8 MPa, washing with deionized water and absolute ethyl alcohol, and vacuum drying at 55-65 ℃ for 12 h; heating to 450-500 ℃ at a heating rate of 4-6/min, preserving heat for 40-60 min, naturally cooling to room temperature, washing with absolute ethyl alcohol, and drying; mixing with bacillus powder of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter, heating to 60-80 ℃ at a heating rate of 4-6/min, and keeping the temperature for 20-30 min to obtain a composite microbial inoculum;

uniformly mixing the composite microbial inoculum and a porous carrier, fully mixing under a negative pressure condition for 30-50 min to obtain a compound, and mixing the compound and sand to prepare fine aggregate; mixing cement, fine aggregate and water to prepare the cement-based material.

Wherein the molar mass ratio of the manganese chloride to the 2-quinolinecarboxylic acid is 1: 2; the method comprises the following steps of utilizing ultrahigh-speed airflow generated by high-pressure air to enable manganese chloride and 2-quinolinecarboxylic acid to rub and collide with each other, then carrying out high-temperature treatment to generate a metal organic framework, mixing the metal organic framework with spore powder, promoting the connection of the metal organic framework and efficient converting agent manganese chloride in the spore powder, wrapping the spore powder and connecting the spore powder with the framework, and reducing the damage of the external environment to the microorganisms; when the prepared composite microbial inoculum is mixed with the porous carrier, the load capacity and the load capacity of the composite microbial inoculum on the porous carrier are improved due to the interaction between the porous carrier and the frame; because of the affinity of the complex microbial inoculum to water and the adsorption of the complex microbial inoculum to carbon dioxide in the environment, the hydration reaction of the complex microbial inoculum to the carbon dioxide is promoted, the formation of carbonate ions is accelerated, heavy metal ions are attracted, and the sewage treatment efficiency is improved; when the cement-based material is applied to a sewage treatment tank as a cement-based material, the cement-based material can be used as a crystal nucleus to promote the hydration of fine aggregate and improve the mechanical property of the prepared concrete.

Furthermore, the cement-based material with the water purification function prepared by the arbitrary preparation method can replace 1-15% of fine aggregate by weight in the components of the inner wall of the sewage treatment tank, and the sewage treatment tank is prepared for water treatment.

Compared with the prior art, the invention has the following beneficial effects:

1. compared with the traditional method of adding various medicaments, the cement-based material with the water purification function degrades organic matters and removes multi-metal ions through the cement-based material of the sewage treatment tank, the composite microbial inoculum can decompose the organic matters into carbon dioxide and water, and accelerate the hydration reaction of the carbon dioxide and the formation of mineral deposition with the multi-metal ions, so that the simultaneous remediation of multiple pollutants is realized, the remediation effect is better, and the process is convenient.

2. According to the preparation method of the cement-based material with the water purification function, disclosed by the invention, the attapulgite and the ferroferric oxide in the cement-based material can effectively enrich multiple metals in water, and the heavy metal is deposited by a product formed by decomposing organic matters through the composite microbial inoculum, so that the migration of heavy metal ions is effectively prevented, and the sewage treatment is realized.

3. According to the application of the cement-based material with the water purification function, the carrier is prepared by adopting the purified and deposited sludge, so that the comprehensive utilization of waste resources is realized, and the risk of the purified sludge on the environment due to long-term stacking is effectively reduced; the invention has the advantages of simple preparation process, wide raw material source, lower manufacturing cost, no secondary pollution, good ecological performance and better application prospect.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a graph showing the concentration of organic substances and heavy metals with respect to time in example 1 of the present invention;

FIG. 2 is a graph showing the relationship between the concentration of organic substances and heavy metals and time in example 3 of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

(1) Preparing a porous carrier:

grinding the purified and deposited sludge, fly ash, ferroferric oxide, attapulgite and sodium bicarbonate into powder, adding water, mixing into slurry, and granulating to obtain spherical particles with the particle size of 5 mm; wherein the mass ratio of the purified and deposited sludge, the fly ash, the ferroferric oxide, the attapulgite, the sodium bicarbonate and the water is 100: 10: 3: 10: 5: 20;

drying, preheating, roasting and naturally cooling the spherical particles to normal temperature, wherein the drying process comprises the following steps: the drying temperature is 105 ℃, the drying time is 12h, and the preheating process comprises the following steps: the preheating temperature is 200 ℃, the preheating time is 10m, and the roasting process comprises the following steps: roasting at 1100 deg.C for 10min to obtain porous carrier;

(2) preparing a cement-based material:

inoculating pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter to a culture medium respectively, wherein the culture medium comprises the following components in parts by weight: 1000mL of deionized water, 8g of peptone, 2g of yeast and 2g of beef extract, culturing for 24h at constant temperature, adding a high-efficiency transforming agent manganese chloride with the addition of 2g/L, and performing spray drying, wherein the process comprises the following steps: obtaining the spore powder of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter at the temperature of 1051 ℃ and the speed of 10 mL/min;

and (2) mixing the bacillus powder of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter, wherein the mass ratio of the bacillus powder of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter is 1: 1:2, obtaining a composite microbial inoculum;

uniformly mixing the composite microbial inoculum and the porous carrier, wherein the mass ratio of the composite microbial inoculum to the porous carrier is 5: 100, fully mixing under the condition of negative pressure for 30min to obtain a compound, and mixing the compound with sand to obtain fine aggregate, wherein the weight ratio of the compound in the fine aggregate is 5%; mixing cement, fine aggregate and water, wherein the cement is 450g, the sand is 1282.5g, the water is 225g, and the compound is 67.5g, so as to prepare the cement-based material.

Example 2

(1) Preparing a porous carrier:

grinding the purified and deposited sludge, fly ash, ferroferric oxide, attapulgite and sodium bicarbonate into powder, adding water, mixing into slurry, and granulating to obtain spherical particles with the particle size of 4 mm; wherein the mass ratio of the purified and deposited sludge, the fly ash, the ferroferric oxide, the attapulgite, the sodium bicarbonate and the water is 100: 12: 3: 12: 5: 30, of a nitrogen-containing gas;

drying, preheating, roasting and naturally cooling the spherical particles to normal temperature, wherein the drying process comprises the following steps: the drying temperature is 100 ℃, the drying time is 18h, and the preheating process comprises the following steps: the preheating temperature is 200 ℃, the preheating time is 12m, and the roasting process comprises the following steps: roasting at 1100 deg.C for 20min to obtain porous carrier;

(2) preparing a cement-based material:

inoculating pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter to a culture medium respectively, wherein the culture medium comprises the following components in parts by weight: 1000mL of deionized water, 12g of peptone, 2g of yeast and 3g of beef extract, culturing for 36h at constant temperature, adding a high-efficiency transforming agent manganese chloride with the addition of 3g/L, and performing spray drying, wherein the process comprises the following steps: obtaining the bacillus powder of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter at the temperature of 108 ℃ and the speed of 12 mL/min;

and (2) mixing the bacillus powder of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter, wherein the mass ratio of the bacillus powder of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter is 1.2: 1.2: 2, obtaining a composite microbial inoculum;

uniformly mixing the composite microbial inoculum and the porous carrier, wherein the mass ratio of the composite microbial inoculum to the porous carrier is 5: 100, fully mixing under the condition of negative pressure for 40min to obtain a compound, and mixing the compound with sand to obtain fine aggregate, wherein the weight ratio of the compound in the fine aggregate is 6%; mixing cement, fine aggregate and water, wherein the cement is 450g, the sand is 1269g, the water is 225g, and the compound is 81g, so as to prepare the cement-based material.

Example 3

(1) Preparing a porous carrier:

grinding the purified and deposited sludge, fly ash, ferroferric oxide, attapulgite and sodium bicarbonate into powder, adding water, mixing into slurry, and granulating to obtain spherical particles with the particle size of 4 mm; wherein the mass ratio of the purified and deposited sludge, the fly ash, the ferroferric oxide, the attapulgite, the sodium bicarbonate and the water is 100: 20: 5: 20: 10: 50;

drying, preheating, roasting and naturally cooling the spherical particles to normal temperature, wherein the drying process comprises the following steps: the drying temperature is 110 ℃, the drying time is 24h, and the preheating process comprises the following steps: the preheating temperature is 210 ℃, the preheating time is 15m, and the roasting process comprises the following steps: roasting at 1120 deg.C for 30min to obtain porous carrier;

(2) preparing a cement-based material:

inoculating pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter to a culture medium respectively, wherein the culture medium comprises the following components in parts by weight: 1000mL of deionized water, 10g of peptone, 3g of yeast and 5g of beef extract, culturing for 48h at constant temperature, adding a high-efficiency transforming agent manganese chloride with the addition of 5g/L, and performing spray drying, wherein the process comprises the following steps: obtaining the bacillus powder of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter at the temperature of 110 ℃ and the speed of 20 mL/min;

and (2) mixing the bacillus powder of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter, wherein the mass ratio of the bacillus powder of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter is 1.5: 1.5: 2, obtaining a composite microbial inoculum;

uniformly mixing the composite microbial inoculum and the porous carrier, wherein the mass ratio of the composite microbial inoculum to the porous carrier is 10: 100, fully mixing under the condition of negative pressure for 50min to obtain a compound, and mixing the compound with sand to obtain fine aggregate, wherein the weight ratio of the compound in the fine aggregate is 7%; mixing cement, fine aggregate and water, wherein the cement is 450g, the sand is 1255.5g, the water is 225g, and the compound is 94.5g, so as to prepare the cement-based material.

Example 4

(1) Preparing a porous carrier:

adding ferrous sulfate and ferric sulfate into deionized water, stirring at 42 ℃ for 13min, adding ammonia water to adjust the pH of the system to 10.8, and washing the precipitate to be neutral; adding deionized water and calcium oxide, performing ultrasonic treatment for 20min, adding aluminum chloride, performing ultrasonic reaction for 120min, standing for 40min, washing precipitate, drying, and filtering to obtain ferroferric oxide;

grinding the purified and deposited sludge, fly ash, ferroferric oxide, attapulgite and sodium bicarbonate into powder, adding water, mixing into slurry, and granulating to obtain spherical particles with the particle size of 4 mm; wherein the mass ratio of the purified and deposited sludge, the fly ash, the ferroferric oxide, the attapulgite, the sodium bicarbonate and the water is 100: 20: 5: 20: 10: 50;

drying, preheating, roasting and naturally cooling the spherical particles to normal temperature, wherein the drying process comprises the following steps: the drying temperature is 110 ℃, the drying time is 24h, and the preheating process comprises the following steps: the preheating temperature is 210 ℃, the preheating time is 15m, and the roasting process comprises the following steps: roasting at 1120 deg.C for 30min to obtain porous carrier;

(2) preparing a cement-based material:

inoculating pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter to a culture medium respectively, wherein the culture medium comprises the following components in parts by weight: 1000mL of deionized water, 10g of peptone, 3g of yeast and 5g of beef extract, culturing for 48h at constant temperature, adding a high-efficiency transforming agent manganese chloride with the addition of 5g/L, and performing spray drying, wherein the process comprises the following steps: obtaining the bacillus powder of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter at the temperature of 110 ℃ and the speed of 20 mL/min;

and (2) mixing the bacillus powder of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter, wherein the mass ratio of the bacillus powder of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter is 1.5: 1.5: 2, preparing spore bacterium powder;

uniformly mixing manganese chloride and 2-quinolinecarboxylic acid, circularly reacting at the flow rate of 1000g/min for 8min under the pressure of 1.2MPa, washing with deionized water and absolute ethanol, and vacuum drying at 55 deg.C for 12 h; heating to 450 deg.C at a heating rate of 4/min, keeping the temperature for 40min, naturally cooling to room temperature, washing with anhydrous ethanol, and drying; mixing with spore bacteria powder, heating to 60 deg.C at a heating rate of 4/min, and keeping the temperature for 20min to obtain composite microbial inoculum; obtaining a composite microbial inoculum;

uniformly mixing the composite microbial inoculum and the porous carrier, wherein the mass ratio of the composite microbial inoculum to the porous carrier is 10: 100, fully mixing under the condition of negative pressure for 50min to obtain a compound, and mixing the compound with sand to obtain fine aggregate, wherein the weight ratio of the compound in the fine aggregate is 7%; mixing cement, fine aggregate and water, wherein the cement is 450g, the sand is 1255.5g, the water is 225g, and the compound is 94.5g, so as to prepare the cement-based material.

Example 5

(1) Preparing a porous carrier:

adding ferrous sulfate and ferric sulfate into deionized water, stirring at 45 ℃ for 15min, adding ammonia water to adjust the pH of the system to 11.1, and washing the precipitate to be neutral; adding deionized water and calcium oxide, performing ultrasonic treatment for 25min, adding aluminum chloride, performing ultrasonic reaction for 135min, standing for 50min, washing precipitate, drying, and filtering to obtain ferroferric oxide;

grinding the purified and deposited sludge, fly ash, ferroferric oxide, attapulgite and sodium bicarbonate into powder, adding water, mixing into slurry, and granulating to obtain spherical particles with the particle size of 2 mm; wherein the mass ratio of the purified and deposited sludge, the fly ash, the ferroferric oxide, the attapulgite, the sodium bicarbonate and the water is 100: 20: 5: 20: 10: 50;

drying, preheating, roasting and naturally cooling the spherical particles to normal temperature, wherein the drying process comprises the following steps: the drying temperature is 110 ℃, the drying time is 24h, and the preheating process comprises the following steps: the preheating temperature is 210 ℃, the preheating time is 15m, and the roasting process comprises the following steps: roasting at 1120 deg.C for 30min to obtain porous carrier;

(2) preparing a cement-based material:

inoculating pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter to a culture medium respectively, wherein the culture medium comprises the following components in parts by weight: 1000mL of deionized water, 10g of peptone, 3g of yeast and 5g of beef extract, culturing for 48h at constant temperature, adding a high-efficiency transforming agent manganese chloride with the addition of 5g/L, and performing spray drying, wherein the process comprises the following steps: obtaining the bacillus powder of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter at the temperature of 110 ℃ and the speed of 20 mL/min;

and (2) mixing the bacillus powder of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter, wherein the mass ratio of the bacillus powder of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter is 1.5: 1.5: 2, preparing spore bacterium powder;

uniformly mixing manganese chloride and 2-quinolinecarboxylic acid, circularly reacting at the flow rate of 1100g/min for 11min under the pressure of 1.5MPa, washing with deionized water and absolute ethanol, and vacuum drying at 60 deg.C for 12 h; heating to 475 ℃ at a heating rate of 5/min, preserving heat for 50min, naturally cooling to room temperature, washing with absolute ethyl alcohol, and drying; mixing with spore bacteria powder, heating to 70 deg.C at a heating rate of 5/min, and keeping the temperature for 25min to obtain composite microbial inoculum; obtaining a composite microbial inoculum;

uniformly mixing the composite microbial inoculum and the porous carrier, wherein the mass ratio of the composite microbial inoculum to the porous carrier is 10: 100, fully mixing under the condition of negative pressure for 50min to obtain a compound, and mixing the compound with sand to obtain fine aggregate, wherein the weight ratio of the compound in the fine aggregate is 7%; mixing cement, fine aggregate and water, wherein the cement is 450g, the sand is 1255.5g, the water is 225g, and the compound is 94.5g, so as to prepare the cement-based material.

Example 6

(1) Preparing a porous carrier:

adding ferrous sulfate and ferric sulfate into deionized water, stirring at 48 ℃ for 17min, adding ammonia water to adjust the pH of the system to 11.5, and washing the precipitate to be neutral; adding deionized water and calcium oxide, performing ultrasonic treatment for 30min, adding aluminum chloride, performing ultrasonic reaction for 150min, standing for 60min, washing precipitate, drying, and filtering to obtain ferroferric oxide;

grinding the purified and deposited sludge, fly ash, ferroferric oxide, attapulgite and sodium bicarbonate into powder, adding water, mixing into slurry, and granulating to obtain spherical particles with the particle size of 2 mm; wherein the mass ratio of the purified and deposited sludge, the fly ash, the ferroferric oxide, the attapulgite, the sodium bicarbonate and the water is 100: 20: 5: 20: 10: 50;

drying, preheating, roasting and naturally cooling the spherical particles to normal temperature, wherein the drying process comprises the following steps: the drying temperature is 110 ℃, the drying time is 24h, and the preheating process comprises the following steps: the preheating temperature is 210 ℃, the preheating time is 15m, and the roasting process comprises the following steps: roasting at 1120 deg.C for 30min to obtain porous carrier;

(2) preparing a cement-based material:

inoculating pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter to a culture medium respectively, wherein the culture medium comprises the following components in parts by weight: 1000mL of deionized water, 10g of peptone, 3g of yeast and 5g of beef extract, culturing for 48h at constant temperature, adding a high-efficiency transforming agent manganese chloride with the addition of 5g/L, and performing spray drying, wherein the process comprises the following steps: obtaining the bacillus powder of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter at the temperature of 110 ℃ and the speed of 20 mL/min;

and (2) mixing the bacillus powder of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter, wherein the mass ratio of the bacillus powder of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter is 1.5: 1.5: 2, preparing spore bacterium powder;

uniformly mixing manganese chloride and 2-quinolinecarboxylic acid, circularly reacting for 15min at the flow rate of 1200g/min under the pressure of 1.8MPa, washing with deionized water and absolute ethyl alcohol, and vacuum drying at 65 deg.C for 12 h; heating to 500 deg.C at a heating rate of 6/min, keeping the temperature for 60min, naturally cooling to room temperature, washing with anhydrous ethanol, and drying; mixing with spore bacteria powder, heating to 80 deg.C at a heating rate of 6/min, and keeping the temperature for 30min to obtain composite microbial inoculum; obtaining a composite microbial inoculum;

uniformly mixing the composite microbial inoculum and the porous carrier, wherein the mass ratio of the composite microbial inoculum to the porous carrier is 10: 100, fully mixing under the condition of negative pressure for 50min to obtain a compound, and mixing the compound with sand to obtain fine aggregate, wherein the weight ratio of the compound in the fine aggregate is 7%; mixing cement, fine aggregate and water, wherein the cement is 450g, the sand is 1255.5g, the water is 225g, and the compound is 94.5g, so as to prepare the cement-based material.

Comparative example 1

(1) Preparing a porous carrier:

grinding the purified and deposited sludge, fly ash, ferroferric oxide, attapulgite and sodium bicarbonate into powder, adding water, mixing into slurry, and granulating to obtain spherical particles with the particle size of 2 mm; wherein the mass ratio of the purified and deposited sludge, the fly ash, the ferroferric oxide, the attapulgite, the sodium bicarbonate and the water is 100: 20: 5: 20: 10: 50;

drying, preheating, roasting and naturally cooling the spherical particles to normal temperature, wherein the drying process comprises the following steps: the drying temperature is 110 ℃, the drying time is 24h, and the preheating process comprises the following steps: the preheating temperature is 210 ℃, the preheating time is 15m, and the roasting process comprises the following steps: roasting at 1120 ℃ for 30min to prepare a porous carrier, and mixing the porous carrier with sand to prepare fine aggregate, wherein the weight ratio of the porous carrier in the fine aggregate is 7%; mixing cement, fine aggregate and water, wherein the cement is 450g, the sand is 1255.5g, the water is 225g, and the porous carrier is 94.5g, so as to prepare the cement-based material.

Comparative example 2

(1) Preparing a porous carrier:

adding ferrous sulfate and ferric sulfate into deionized water, stirring at 48 ℃ for 17min, adding ammonia water to adjust the pH of the system to 11.5, and washing the precipitate to be neutral; adding deionized water and calcium oxide, performing ultrasonic treatment for 30min, adding aluminum chloride, performing ultrasonic reaction for 150min, standing for 60min, washing precipitate, drying, and filtering to obtain ferroferric oxide;

grinding the purified and deposited sludge, fly ash, ferroferric oxide, attapulgite and sodium bicarbonate into powder, adding water, mixing into slurry, and granulating to obtain spherical particles with the particle size of 2 mm; wherein the mass ratio of the purified and deposited sludge, the fly ash, the ferroferric oxide, the attapulgite, the sodium bicarbonate and the water is 100: 20: 5: 20: 10: 50;

drying, preheating, roasting and naturally cooling the spherical particles to normal temperature, wherein the drying process comprises the following steps: the drying temperature is 110 ℃, the drying time is 24h, and the preheating process comprises the following steps: the preheating temperature is 210 ℃, the preheating time is 15m, and the roasting process comprises the following steps: roasting at 1120 deg.C for 30min to obtain porous carrier;

(2) preparing a cement-based material:

inoculating pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter to a culture medium respectively, wherein the culture medium comprises the following components in parts by weight: 1000mL of deionized water, 10g of peptone, 3g of yeast and 5g of beef extract, culturing for 48h at constant temperature, adding a high-efficiency transforming agent manganese chloride with the addition of 5g/L, and performing spray drying, wherein the process comprises the following steps: obtaining the bacillus powder of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter at the temperature of 110 ℃ and the speed of 20 mL/min;

and (2) mixing the bacillus powder of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter, wherein the mass ratio of the bacillus powder of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter is 1.5: 1.5: 2, obtaining a composite microbial inoculum;

uniformly mixing the composite microbial inoculum and the porous carrier, wherein the mass ratio of the composite microbial inoculum to the porous carrier is 10: 100, fully mixing under the condition of negative pressure for 50min to obtain a compound, and mixing the compound with sand to obtain fine aggregate, wherein the weight ratio of the compound in the fine aggregate is 7%; mixing cement, fine aggregate and water, wherein the cement is 450g, the sand is 1255.5g, the water is 225g, and the compound is 94.5g, so as to prepare the cement-based material.

Comparative example 3

(1) Preparing a porous carrier:

grinding the purified and deposited sludge, fly ash, ferroferric oxide, attapulgite and sodium bicarbonate into powder, adding water, mixing into slurry, and granulating to obtain spherical particles with the particle size of 2 mm; wherein the mass ratio of the purified and deposited sludge, the fly ash, the ferroferric oxide, the attapulgite, the sodium bicarbonate and the water is 100: 20: 5: 20: 10: 50;

drying, preheating, roasting and naturally cooling the spherical particles to normal temperature, wherein the drying process comprises the following steps: the drying temperature is 110 ℃, the drying time is 24h, and the preheating process comprises the following steps: the preheating temperature is 210 ℃, the preheating time is 15m, and the roasting process comprises the following steps: roasting at 1120 deg.C for 30min to obtain porous carrier;

(2) preparing a cement-based material:

inoculating pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter to a culture medium respectively, wherein the culture medium comprises the following components in parts by weight: 1000mL of deionized water, 10g of peptone, 3g of yeast and 5g of beef extract, culturing for 48h at constant temperature, adding a high-efficiency transforming agent manganese chloride with the addition of 5g/L, and performing spray drying, wherein the process comprises the following steps: obtaining the bacillus powder of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter at the temperature of 110 ℃ and the speed of 20 mL/min;

and (2) mixing the bacillus powder of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter, wherein the mass ratio of the bacillus powder of pseudomonas aeruginosa, bacillus thuringiensis and arthrobacter is 1.5: 1.5: 2, preparing spore bacterium powder;

uniformly mixing manganese chloride and 2-quinolinecarboxylic acid, circularly reacting for 15min at the flow rate of 1200g/min under the pressure of 1.8MPa, washing with deionized water and absolute ethyl alcohol, and vacuum drying at 65 deg.C for 12 h; heating to 500 deg.C at a heating rate of 6/min, keeping the temperature for 60min, naturally cooling to room temperature, washing with anhydrous ethanol, and drying; mixing with spore bacteria powder, heating to 80 deg.C at a heating rate of 6/min, and keeping the temperature for 30min to obtain composite microbial inoculum; obtaining a composite microbial inoculum;

uniformly mixing the composite microbial inoculum and the porous carrier, wherein the mass ratio of the composite microbial inoculum to the porous carrier is 10: 100, fully mixing under the condition of negative pressure for 50min to obtain a compound, and mixing the compound with sand to obtain fine aggregate, wherein the weight ratio of the compound in the fine aggregate is 7%; mixing cement, fine aggregate and water, wherein the cement is 450g, the sand is 1255.5g, the water is 225g, and the compound is 94.5g, so as to prepare the cement-based material.

Experiment of

Taking the cement-based materials obtained in examples 1-6 and comparative examples 1-3, preparing a 1000mm × 1000mm × 500mm pool test piece with a wall thickness of 50mm, and curing the pool test piece with water containing 17.86mg/L Ca²⁺、21.06mg/L Hg²⁺30.11mg/L dimethylbenzene, and monitoring the change rule of organic matters and multiple metals in water; after 14d of experiment, Ca in water was calculated²⁺、Hg²⁺And xylene removal rate.

From the data in the table above, it is clear that the following conclusions can be drawn:

the cement-based materials obtained in examples 1 to 6 were compared with those obtained in comparative examples 1 to 3, and the results of the tests showed that:

1. experiment 14d on Ca for cement-based materials obtained in examples 1-6 compared to the cement-based material obtained in comparative example 1²⁺、Hg²⁺The removal of dimethylbenzene is obviously improved, and the cement-based material prepared by the method can realize the treatment of sewage containing organic matters and heavy metals;

2. compared with the embodiment 3, the embodiments 4 to 6 all add treatment processes to the ferroferric oxide and the composite microbial inoculum; compared with the embodiment 6, the compound microbial inoculum is not treated in the comparative example 2, and the ferroferric oxide is not treated in the comparative example 3; experiments and data thereof show that the treatment process for ferroferric oxide and the composite microbial inoculum can improve the capability of the cement-based material prepared by the method for treating the sewage containing organic matters and heavy metals.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process method article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process method article or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.