CN115286329B - Self-cleaning brick with purification function and preparation method and application thereof - Google Patents
Self-cleaning brick with purification function and preparation method and application thereof Download PDFInfo
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- CN115286329B CN115286329B CN202210976688.1A CN202210976688A CN115286329B CN 115286329 B CN115286329 B CN 115286329B CN 202210976688 A CN202210976688 A CN 202210976688A CN 115286329 B CN115286329 B CN 115286329B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
- E02B3/14—Preformed blocks or slabs for forming essentially continuous surfaces; Arrangements thereof
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00284—Materials permeable to liquids
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Hydrology & Water Resources (AREA)
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Abstract
The invention discloses a self-cleaning brick with a purifying function, and a preparation method and application thereof, wherein the self-cleaning brick is prepared from the following raw materials in parts by weight: 10 to 20 parts of cementing material, 60 to 80 parts of slag, 0.15 to 0.25 part of special binder for alkaline permeable concrete, 0.15 to 0.25 part of alkali excitant, 0.15 to 0.25 part of fly ash, 10 to 20 parts of zeolite powder, 1.5 to 2.5 parts of reinforcing agent, 50 to 70 parts of aluminum sludge, 1.5 to 2.5 parts of purifying agent and 10 to 20 parts of water; the self-cleaning brick has super-strong adsorption performance, can adsorb pollutants such as phosphorus, ammonia nitrogen, organic substances, heavy metal ions and the like in sewage, has a purifying effect on water quality, and particularly achieves a removal rate of 16.6% of total nitrogen and a removal rate of 25.3% of total phosphorus.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a self-cleaning brick with a purifying function, and a preparation method and application thereof.
Background
The conventional concrete self-cleaning brick technology is beneficial to protecting surface runoff water and soil from loss, but is unfavorable for energy communication between water in a farmland ditch and a slope protection, and the corresponding water quality purification effect cannot be carried out through the slope protection, so that the self-cleaning capability of the water is reduced; in addition, the cement mixing ratio is usually not lower than 20% in the preparation of traditional building materials such as concrete self-cleaning bricks, and cement production is a process with high energy consumption and high carbon emission, which has a great influence on the environment, so that the fumbling attempt on cement substitute materials is urgent.
The ecological channel purification technology used for farmland standardized construction is a pollutant in-situ interception technology, and is mainly divided into two types, namely ecological grading interception and control. However, the distribution route is long and dispersed, so that maintenance is difficult, and sometimes pollutants are released into the water again after the plants are putrefactive due to untimely maintenance, so that secondary pollution is caused. Another method is to arrange a concentrated ecological purifying pool in the farmland drainage ditch, and the maintenance is simple and convenient and is easy to implement. However, in practice, it has been found that the volume of the purification tank directly determines the purification effect, and it is not suitable to occupy a large amount of cultivated land to construct a large-capacity purification tank.
In the agricultural production process, the nitrogen and phosphorus content of the farmland tail water is high due to the large application amount of the nitrogen and phosphorus fertilizer. And pollutants such as nitrogen, phosphorus and the like bring eutrophication hidden trouble to the subsequent receiving water body through farmland irrigation and erosion of rainfall runoff. The sewage treatment technology with limited running cost budget, flexible arrangement, convenient maintenance and the like for agricultural wastewater treatment is a great bottleneck. Therefore, the prior art has the defect that the eutrophication hidden trouble is brought to the subsequent receiving water body in the running process.
In view of this, the present invention has been made.
Disclosure of Invention
The invention aims to provide a self-cleaning brick with a purifying function, and a preparation method and application thereof.
In order to achieve the above object of the present invention, the following technical solutions are specifically adopted:
the invention provides a self-cleaning brick with a purifying function, which is prepared from the following raw materials in parts by weight:
10 to 20 parts of cementing material, 60 to 80 parts of slag, 0.15 to 0.25 part of special binder for alkaline permeable concrete, 0.15 to 0.25 part of alkali excitant, 0.15 to 0.25 part of fly ash, 10 to 20 parts of zeolite powder, 1.5 to 2.5 parts of reinforcing agent, 50 to 70 parts of aluminum sludge, 1.5 to 2.5 parts of purifying agent and 10 to 20 parts of water.
In the present invention, the aluminium sludge from waterworks is both a pollutant and a resource. The aluminum sludge contains amorphous aluminum compounds and has a developed micropore structure and a larger specific surface area, so that the aluminum sludge has a larger adsorption rate, more adsorption sites and strong affinity adsorption capacity for phosphorus and other anions in water.
Slag is waste residue discharged from household garbage incineration treatment, power plants and the like, has a developed microporous structure and has high porosity; the larger specific surface area can provide good space for the growth of microorganisms; the surface of the catalyst is rich in a plurality of functional groups, so that the catalyst has high adsorption rate, more adsorption points and strong affinity adsorption capacity, the adsorption capacity reaches 107.53mg/g, and heavy metals and organic pollutants can be effectively adsorbed. The slag contains a large amount of aluminosilicate, has remarkable advantages in the aspect of dephosphorization, mainly adopts two methods of chemical conversion and physical adsorption, has smaller particle size and better dephosphorization effect, and on one hand, the adsorption active center of inorganic mineral substances in particles is increased and the surface adsorption effect on phosphorus is enhanced because the slag with small particle size has larger specific surface area; on the other hand, the slag with small grain size contains more heavy metals, and leaching is increased, and the heavy metals can react with phosphate in the wastewater to generate precipitation, so that phosphorus element in the wastewater is removed.
According to the self-cleaning brick, a neutral hydration environment is created by the cooperation of slag, aluminum sludge, cementing material and fly ash in raw materials for preparing the self-cleaning brick, gel substances such as hydrated calcium silicate and the like are generated, and a structure with higher porosity is further formed. When water is evaporated by hydration and other reasons, voids remain in the internal cement hydrate, i.e. voids are the spaces left after evaporation of the water present between the cement hydration particles. The part belongs to capillary holes, is in a net shape with distributed communication, can generate capillary action, and has the pore diameter ranging from 16 nm to 2.5 nm; the other part is to generate about 50% of C-S-H, which is known as gel, through chemical and physical action with water. The electron microscope can not distinguish the large number of micro-pores, the aperture is about 2.5-0.5 nm, even less than 0.5nm, and 1/4 of the volume of the C-S-H is the pore. And C-S-H is a determining factor for determining the property of concrete (cement stone), and the porosity is calculated by a formula of T.C.powers.
The self-cleaning brick is prepared from the waste aluminum sludge, slag and fly ash, realizes the utilization of waste resources, simultaneously utilizes slag with high specific surface area and high film forming property, contains carbon source and strong adsorption property, and aluminum sludge with high specific surface area and strong adsorption property on phosphorus as main materials, can provide good space for the growth of microorganisms, and can effectively adsorb phosphorus, heavy metals and organic pollutants. The self-cleaning brick achieves the effect of purifying water quality through microorganisms planted on the surface and super-strong adsorption performance on the premise of no power and convenient management and maintenance, and particularly achieves the removal rate of 16.6% of total nitrogen and 25.3% of total phosphorus, so that the water quality of a water outlet achieves the standard of five water classes, and the problem of secondary pollution of a river channel is solved.
Preferably, the special binder for the alkaline permeable concrete is at least one selected from sodium chloride, quartz, ferric oxide, dolomite, tricalcium silicate, magnesium oxide and aluminum oxide;
the cementing material is silicon-aluminum-based cementing material and/or cement.
Preferably, the reinforcing agent is selected from at least one of hydroxypropyl methylcellulose, brucite fiber, hydroxypropyl starch ether, and hydrated magnesium silicate.
Preferably, the purifying agent is a mesoporous composite molecular sieve. The adsorption performance can be improved through the addition of the purifying agent, and then the water quality can be better purified.
Preferably, the raw materials also comprise 2-3 parts of composite microbial agent, and each part of composite microbial agent comprises 1-3 parts of denitrifying bacteria, 3-5 parts of dephosphorizing bacteria and 15-20 parts of KS50 composite microbial agent.
The types of denitrifying bacteria and dephosphorizing bacteria are not strictly limited in the invention, and those skilled in the art can adopt denitrifying bacteria and dephosphorizing bacteria which are conventionally used for water treatment in the field; for example, denitrifying bacteria; the dephosphorization bacteria can be SCA-P dephosphorization bacteria.
Preferably, the porosity of the slag is 50% -60%;
the water content of the sludge is 75-80%.
The second aspect of the invention provides a preparation method of the self-cleaning brick with the purification function, which comprises the following steps:
(a) Mixing and uniformly stirring aluminum sludge, an alkali excitant and a purifying agent to obtain a mixture 1;
(b) Adding slag, cementing material, reinforcing agent and fly ash into the mixture 1, and uniformly stirring to obtain a mixture 2;
(c) Adding zeolite powder, an alkaline water-permeable concrete special binder and water into the mixture 2, and uniformly stirring to obtain mixed slurry;
(d) And (3) extruding, forming and curing the mixed slurry to obtain the self-cleaning brick with the purification function.
Preferably, the preparation method further comprises a step of adding a composite microbial agent, and the step of adding the composite microbial agent comprises the following steps: preparing a compound microbial agent into a compound microbial solution, and spraying the compound microbial solution on the surface after curing in the step (d) is finished; or the compound microbial agent is firstly mixed with the water in the step (c) and then added into the mixture 2.
The third aspect of the invention provides an application of the self-cleaning brick with the purification function in sewage purification.
The fourth aspect of the present invention provides a method for purifying wastewater, wherein the self-cleaning brick with a purification function is paved at the bottom of a river channel, and is used for purifying sewage flowing through the river channel.
Preferably, the sewage is domestic sewage, industrial sewage, aquaculture sewage or agricultural sewage.
Compared with the prior art, the invention has the beneficial effects that at least:
the self-cleaning brick is prepared from the waste aluminum sludge, slag and fly ash, realizes the utilization of waste resources, simultaneously utilizes slag with high specific surface area and high film forming property, contains carbon source and strong adsorption property, and aluminum sludge with high specific surface area and strong adsorption property on phosphorus as main materials, can provide good space for the growth of microorganisms, and can effectively adsorb phosphorus, heavy metals and organic pollutants. The self-cleaning brick provided by the invention realizes the purification effect on water quality through the actions of super-strong adsorption performance and surface field-planted microorganisms on the premise of no power and no convenient management and maintenance, and particularly achieves the removal rate of 16.6% of total nitrogen and 25.3% of total phosphorus, so that the water quality of a water outlet reaches the standard of five water classes, and the problem of river secondary pollution is solved.
Detailed Description
Embodiments of the technical scheme of the present invention will be described in detail below with reference to the embodiments. The following examples are only for more clearly illustrating the technical aspects of the present invention, and thus are merely examples, and are not intended to limit the scope of the present invention.
It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.
The following examples used the following raw materials:
slag: the porosity is 54%; the main components comprise: siO (SiO) 2 43.2％、Al 2 O 3 33.6％、Fe 2 O 3 12.8% of CaO and 2.5%; derived from household garbage incineration bottom slag;
aluminum sludge: the water content is 79%; derived from waterworks sludge;
fly ash: derived from fly ash of coal-fired power plants;
and (3) cement: are commercially available in general.
Example 1
1. Self-cleaning brick with purifying function
The self-cleaning brick with the purification function is prepared from the following raw materials in parts by weight:
10 parts of silicon aluminum-based cementing material, 60 parts of slag, 0.25 part of special binder for alkaline permeable concrete, 0.25 part of alkali excitant, 0.15 part of fly ash, 10 parts of zeolite powder, 2.5 parts of reinforcing agent, 50 parts of aluminum sludge, 1.5 parts of mesoporous composite molecular sieve and 10 parts of water;
wherein, the special binder for the alkaline permeable concrete is a mass mixture of ferric oxide, tricalcium silicate and the like.
The reinforcing agent is hydroxypropyl methylcellulose.
2. Preparation method
The preparation method of the self-cleaning brick with the purification function comprises the following steps:
(a) Mixing and uniformly stirring aluminum sludge, an alkali excitant and a mesoporous composite molecular sieve to obtain a mixture 1;
(b) Adding slag, a silicon-aluminum-based cementing material, an enhancer and fly ash into the mixture 1, and uniformly stirring to obtain a mixture 2;
(c) Adding zeolite powder, an alkaline water-permeable concrete special binder and water into the mixture 2, and uniformly stirring to obtain mixed slurry;
(d) And (3) extruding, forming and curing the mixed slurry to obtain the self-cleaning brick with the purification function.
Example 2
1. Self-cleaning brick with purifying function
The self-cleaning brick with the purification function is prepared from the following raw materials in parts by weight:
20 parts of cement, 80 parts of slag, 0.15 part of special binder for alkaline permeable concrete, 0.15 part of alkali excitant, 0.25 part of fly ash, 20 parts of zeolite powder, 1.5 parts of reinforcing agent, 70 parts of aluminum sludge, 2.5 parts of mesoporous composite molecular sieve, 20 parts of water and 2 parts of composite microbial agent,
wherein, the special adhesive for the alkaline permeable concrete is an equal mass mixture of quartz, ferric oxide and magnesium oxide.
The reinforcing agent is brucite fiber;
each part of the composite microbial agent comprises 1 part of denitrifying bacteria, 5 parts of dephosphorizing bacteria and 15 parts of KS50 composite microbial agent.
2. Preparation method
The preparation method of the self-cleaning brick with the purification function comprises the following steps:
(a) Mixing and uniformly stirring aluminum sludge, an alkali excitant and a mesoporous composite molecular sieve to obtain a mixture 1;
(b) Adding slag, cement, reinforcing agent and fly ash into the mixture 1, and uniformly stirring to obtain a mixture 2;
(c) Firstly, mixing a composite microbial agent with water to obtain a microbial solution, and then adding zeolite powder, an alkaline permeable concrete special binder and the microbial solution into the mixture 2 and uniformly stirring to obtain mixed slurry;
(d) And (3) extruding, forming and curing the mixed slurry to obtain the self-cleaning brick with the purification function.
Example 3
1. Self-cleaning brick with purifying function
The self-cleaning brick with the purification function is prepared from the following raw materials in parts by weight:
16 parts of cement, 65 parts of slag, 0.25 part of an alkali-activated agent, 0.25 part of fly ash, 12 parts of zeolite powder, 2 parts of a reinforcing agent, 55 parts of aluminum sludge, 2 parts of a mesoporous composite molecular sieve, 17 parts of water and 2 parts of a composite microbial agent;
wherein, the special binder for the alkaline permeable concrete is an equal mass mixture of magnesia and alumina.
The reinforcing agent is hydroxypropyl starch ether;
each part of the composite microbial agent comprises 1 part of denitrifying bacteria, 5 parts of dephosphorizing bacteria and 15 parts of KS50 composite microbial agent.
2. Preparation method
The preparation method of the self-cleaning brick with the purification function comprises the following steps:
(a) Mixing and uniformly stirring aluminum sludge, an alkali excitant and a mesoporous composite molecular sieve to obtain a mixture 1;
(b) Adding slag, cement, reinforcing agent and fly ash into the mixture 1, and uniformly stirring to obtain a mixture 2;
(c) Adding zeolite powder, an alkaline water-permeable concrete special binder and water into the mixture 2, and uniformly stirring to obtain mixed slurry;
(d) And (3) extruding, forming and curing the mixed slurry, preparing a composite microbial agent into a composite microbial solution, and spraying the composite microbial solution on the surface after curing is finished to obtain the self-cleaning brick with the purification function.
Example 4
1. Self-cleaning brick with purifying function
The self-cleaning brick with the purification function is prepared from the following raw materials in parts by weight:
15 parts of cement, 70 parts of slag, 0.2 part of an alkali-activated agent, 0.2 part of fly ash, 15 parts of zeolite powder, 2 parts of a reinforcing agent, 60 parts of aluminum sludge, 2 parts of a mesoporous composite molecular sieve, 15 parts of water and 3 parts of a composite microbial agent;
wherein, the special binder for the alkaline permeable concrete is an equal mass mixture of magnesia and alumina.
The reinforcing agent is hydroxypropyl starch ether;
each part of the composite microbial agent comprises 1 part of denitrifying bacteria, 2 parts of dephosphorizing bacteria and 9 parts of KS50 composite microbial agent.
2. Preparation method
The preparation method of the self-cleaning brick with the purification function comprises the following steps:
(a) Mixing and uniformly stirring aluminum sludge, an alkali excitant and a mesoporous composite molecular sieve to obtain a mixture 1;
(b) Adding slag, cement, reinforcing agent and fly ash into the mixture 1, and uniformly stirring to obtain a mixture 2;
(c) Adding zeolite powder, an alkaline water-permeable concrete special binder and water into the mixture 2, and uniformly stirring to obtain mixed slurry;
(d) And (3) extruding, forming and curing the mixed slurry, preparing a composite microbial agent into a composite microbial solution, and spraying the composite microbial solution on the surface after curing is finished to obtain the self-cleaning brick with the purification function.
Comparative example 1
1. Self-cleaning brick with purifying function
The self-cleaning brick with the purification function is prepared from the following raw materials in parts by weight:
15 parts of cement, 60 parts of slag, 0.2 part of an alkali-activated agent, 0.2 part of fly ash, 15 parts of zeolite powder, 2 parts of a reinforcing agent, 80 parts of aluminum sludge, 2 parts of a mesoporous composite molecular sieve, 15 parts of water and 3 parts of a composite microbial agent;
wherein, the special binder for the alkaline permeable concrete is an equal mass mixture of magnesia and alumina.
The reinforcing agent is hydroxypropyl starch ether;
each part of the composite microbial agent comprises 1 part of denitrifying bacteria, 2 parts of dephosphorizing bacteria and 9 parts of KS50 composite microbial agent.
2. Preparation method
The preparation method of the self-cleaning brick with the purification function comprises the following steps:
(a) Mixing and uniformly stirring aluminum sludge, an alkali excitant and a mesoporous composite molecular sieve to obtain a mixture 1;
(b) Adding slag, cement, reinforcing agent and fly ash into the mixture 1, and uniformly stirring to obtain a mixture 2;
(c) Adding zeolite powder, an alkaline water-permeable concrete special binder and water into the mixture 2, and uniformly stirring to obtain mixed slurry;
(d) And (3) extruding, forming and curing the mixed slurry, preparing a composite microbial agent into a composite microbial solution, and spraying the composite microbial solution on the surface after curing is finished to obtain the self-cleaning brick with the purification function.
Comparative example 2
1. Self-cleaning brick with purifying function
The self-cleaning brick with the purification function is prepared from the following raw materials in parts by weight:
15 parts of cement, 87 parts of slag, 0.2 part of an alkali-exciting agent, 0.2 part of fly ash, 2 parts of a reinforcing agent, 60 parts of aluminum sludge, 15 parts of water and 3 parts of a composite microbial agent;
wherein, the special binder for the alkaline permeable concrete is an equal mass mixture of magnesia and alumina.
The reinforcing agent is hydroxypropyl starch ether;
each part of the composite microbial agent comprises 1 part of denitrifying bacteria, 2 parts of dephosphorizing bacteria and 9 parts of KS50 composite microbial agent.
2. Preparation method
The preparation method of the self-cleaning brick with the purification function comprises the following steps:
(a) Mixing and uniformly stirring aluminum sludge and an alkali excitant to obtain a mixture 1;
(b) Adding slag, cement, reinforcing agent and fly ash into the mixture 1, and uniformly stirring to obtain a mixture 2;
(c) Adding a special binder for alkaline permeable concrete and water into the mixture 2, and uniformly stirring to obtain mixed slurry;
(d) And (3) extruding, forming and curing the mixed slurry, preparing a composite microbial agent into a composite microbial solution, and spraying the composite microbial solution on the surface after curing is finished to obtain the self-cleaning brick with the purification function.
Experimental example
Taking certain farmland runoff water, wherein the related index is total nitrogen=3.8 mg/L and total phosphorus=8 mg/L.
The self-cleaning bricks prepared in examples 3 to 4 and comparative examples 1 to 2 (size 10 cm. Times.20 cm. Times.5 cm) were obtained, respectively;
16 self-cleaning bricks of examples 3 to 4 and comparative examples 1 to 2 were laid on the bottom of an experimental water vat (0.5 m.times.1m to 0.5 m); then, 0.15m of the water is injected into the water tank 3 Is used for farmland runoff water; and (3) standing for 20 days under the room temperature condition, keeping the liquid level unchanged by supplementing sterilized water during the operation, sampling to detect the water quality, calculating the removal rate, and calculating the result as shown in table 1:
TABLE 1
| Group of | Total nitrogen removal (%) | Total phosphorus removal (%) |
| Example 3 | 14.9 | 22.7 |
| Example 4 | 16.6 | 25.3 |
| Comparative example 1 | 10.8 | 13.2 |
| Comparative example 2 | 9.7 | 22.1 |
As can be seen from table 1:
the self-cleaning brick prepared by the technical scheme can effectively remove total nitrogen and total phosphorus in sewage, and compared with the self-cleaning brick prepared by the embodiment of the application, the self-cleaning brick has better effect of removing total nitrogen and total phosphorus in sewage.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention, and are intended to be included within the scope of the appended claims and description.
Claims (4)
1. The self-cleaning brick with the purification function is characterized by being prepared from the following raw materials in parts by weight:
10 to 20 parts of cement, 60 to 80 parts of slag, 0.15 to 0.25 part of special binder for alkaline permeable concrete, 0.15 to 0.25 part of alkali excitant, 0.15 to 0.25 part of fly ash, 10 to 20 parts of zeolite powder, 1.5 to 2.5 parts of reinforcing agent, 50 to 70 parts of aluminum sludge, 1.5 to 2.5 parts of purifying agent and 10 to 20 parts of water;
the raw materials also comprise 2-3 parts of composite microbial agent, wherein each part of composite microbial agent comprises 1-3 parts of denitrifying bacteria, 3-5 parts of dephosphorizing bacteria and 15-20 parts of KS50 composite microbial agent;
the porosity of the slag is 50% -60%; the slag is household garbage incineration bottom slag;
the water content of the aluminum sludge is 75% -80%;
the purifying agent is a mesoporous composite molecular sieve;
the special binder for the alkaline permeable concrete is an equal mass mixture of ferric oxide and tricalcium silicate or an equal mass mixture of quartz, ferric oxide and magnesium oxide or an equal mass mixture of magnesium oxide and aluminum oxide;
the reinforcing agent is at least one selected from hydroxypropyl methylcellulose, brucite fiber, hydroxypropyl starch ether and hydrated magnesium silicate;
the preparation method of the self-cleaning brick with the purification function comprises the following steps:
(a) Mixing and uniformly stirring aluminum sludge, an alkali excitant and a purifying agent to obtain a mixture 1;
(b) Adding slag, cement, reinforcing agent and fly ash into the mixture 1, and uniformly stirring to obtain a mixture 2;
(c) Adding zeolite powder, an alkaline water-permeable concrete special binder and water into the mixture 2, and uniformly stirring to obtain mixed slurry;
(d) Extruding, forming and curing the mixed slurry to obtain the self-cleaning brick with the purifying function;
the preparation method also comprises the step of adding the composite microbial agent, wherein the step of adding the composite microbial agent comprises the following steps: preparing a compound microbial agent into a compound microbial solution, and spraying the compound microbial solution on the surface after curing in the step (d) is finished; or the compound microbial agent is firstly mixed with the water in the step (c) and then added into the mixture 2.
2. The method for preparing the self-cleaning brick with the purification function as claimed in claim 1, which is characterized by comprising the following steps:
(a) Mixing and uniformly stirring aluminum sludge, an alkali excitant and a purifying agent to obtain a mixture 1;
(b) Adding slag, cement, reinforcing agent and fly ash into the mixture 1, and uniformly stirring to obtain a mixture 2;
(c) Adding zeolite powder, an alkaline water-permeable concrete special binder and water into the mixture 2, and uniformly stirring to obtain mixed slurry;
(d) Extruding, forming and curing the mixed slurry to obtain the self-cleaning brick with the purifying function;
the preparation method also comprises the step of adding the composite microbial agent, wherein the step of adding the composite microbial agent comprises the following steps: preparing a compound microbial agent into a compound microbial solution, and spraying the compound microbial solution on the surface after curing in the step (d) is finished; or the compound microbial agent is firstly mixed with the water in the step (c) and then added into the mixture 2.
3. The use of the self-cleaning brick with a purification function as claimed in claim 1 for purifying sewage.
4. A method for purifying wastewater, characterized in that the self-cleaning brick with the purification function of claim 1 is paved at the bottom of a river channel and used for purifying the wastewater flowing in the river channel.
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|---|---|---|---|---|
| WO2010103819A1 (en) * | 2009-03-10 | 2010-09-16 | Izumo Yumin | Filter medium using granular activated coal for purifying eutrophic sewage caused by nitrogen or phosphorus, water purification plant utilizing same, method of treating sludge with fine activated-coal powder as ion-exchange material, and various recycle materials produced by the method |
| CN101880147B (en) * | 2010-05-01 | 2013-05-08 | 马鞍山市黄河水处理工程有限公司 | Steel slag eco-concrete, steel slag eco-concrete product and preparation method thereof |
| CN104478090B (en) * | 2014-11-17 | 2016-08-03 | 天津市环境保护科学研究院 | A kind of multichannel biologic packing material and preparation method and application |
| CN108414389A (en) * | 2018-02-02 | 2018-08-17 | 扬州大学 | Ecological permeable concrete detergent power analysis method |
| CN112321255A (en) * | 2020-11-06 | 2021-02-05 | 江西省建筑材料工业科学研究设计院 | Pervious concrete with biological water purification function and preparation method thereof |
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