Multifunctional active slow-release water purification material and preparation method thereof

Abstract

The application discloses a multifunctional active slow-release water purification material and a preparation method thereof. The multifunctional active slow-release water purification material is prepared from raw materials including the following components in parts by weight: slow-release material 50-100 parts, bentonite 50-150 parts, microbial bacteria powder 10-20 parts, iron powder 15-40 parts, oxygenation agent 10-20 parts, sodium alginate 10-15 parts, calcium nitrate 10-20 parts and polymeric ferric sulfate 10-15 parts. The raw materials have a high synergistic effect on each other, and are indispensable to jointly control the growth of microorganisms and water purification, form a relatively stable micro system, and have a simple and easy preparation process, no toxic and side effects on organisms and environment, and a good application prospect in water pollution remediation engineering.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of environmental protection materials, and particularly relates to a multifunctional active slow-release water purification material and a preparation method thereof. BACKGROUND

[0002] In the process of economic development in various places, a large amount of industrial wastewater, domestic wastewater and agricultural wastewater is often generated, which is simply treated and discharged into rivers and lakes, resulting in pollution of urban rivers and lakes, most of which is eutrophication, and some of which even appears black and smelly. The pollution of rivers and lakes destroys the ecological structure of water bodies, blue-green algae blooms, dissolved oxygen decreases, fish survival is affected, species decreases, ecology is destroyed, and human drinking water health is threatened.

[0003] At present, there are various measures for river and lake treatment, including sewage interception, desilting, adding bottom modifier, microbial powder and the like, but these technologies are effective in a short time and are difficult to produce long-term purification effect, and a product capable of providing slow-release long-acting effect needs to be developed to maintain the sustained and stable purification of water bodies.

[0004] Therefore, the present application is proposed. SUMMARY

[0005] The present application aims to provide a multifunctional active slow-release water purification material and a preparation method thereof, and the multifunctional active slow-release water purification material has the ability of physical adsorption, chemical adsorption and biological decomposition, and can continuously absorb surrounding pollutants for purification.

[0006] In order to achieve the above-mentioned purpose of the present application, the following technical scheme is adopted:

[0007] The present application provides a multifunctional active slow-release water purification material, which is prepared from raw materials including the following weight parts:

[0008] The slow-release material is 50-100 parts, bentonite is 50-150 parts, microbial powder is 10-20 parts, iron powder is 15-40 parts, oxygenation agent is 10-20 parts, sodium alginate is 10-15 parts, calcium nitrate is 10-20 parts, and polymeric ferric sulfate is 10-15 parts.

[0009] In this invention, the slow-release material (polycaprolactone) in the multifunctional active slow-release water purification material is slowly eroded and dissolved by the surrounding environment over time, resulting in the slow release of its active substances. Simultaneously, due to the difference in osmotic pressure between the inner and outer sides of the slow-release layer formed by polycaprolactone, the mixed substances within are slowly released under the influence of osmotic pressure, purifying the water and stabilizing the aquatic environment. Sodium alginate, calcium nitrate, and polyferric sulfate react and cross-link in the water after release, forming an active gel layer. This active gel layer has a broad-spectrum trapping and adsorption capacity, continuously adsorbing surrounding pollutants. Microorganisms, after being released, rapidly integrate into the gel, utilizing it as a carbon-based hotbed for rapid reproduction. Bentonite and iron powder form the gel base, which also serves as the core for microbial aggregation, becoming the attachment site for microorganisms. At this point, the multifunctional active slow-release material is surrounded by layers of thick... A thick layer of bacterial flocs continuously adsorbs and purifies the surrounding water. Furthermore, released calcium peroxide reacts slowly with water to produce oxygen and calcium hydroxide. The oxygen provides oxygen for microorganisms within the gel, the surrounding water, and native microorganisms. Calcium hydroxide reacts with phosphates in the water to form calcium phosphate precipitate, removing phosphorus from the water. The addition of nitrates reduces the utilization of sulfates by sediment microorganisms, leading to the use of nitrates instead, thus reducing hydrogen sulfide production. Nitrate ions increase the activity of denitrifying microorganisms, consuming organic matter while converting nitrates into nitrogen. Similarly, after sodium alginate forms a gel, the remaining calcium ions are adsorbed by the active gel layer, waiting for the availability of free phosphate ions to combine with them to form stable insoluble salts. Iron powder, under the action of nitrate ions, allows Fe... 2+ Easily converted to Fe 3+ This enhances the adsorption of phosphorus by iron oxides, thereby reducing the release of Fe-P.

[0010] Preferably, the multifunctional activated slow-release water purification material is made from raw materials comprising the following parts by weight:

[0011] The ingredients are: 100 parts slow-release material, 120 parts bentonite, 15 parts microbial powder, 20 parts iron powder, 20 parts oxygenating agent, 15 parts sodium alginate, 20 parts calcium nitrate, and 10 parts polyferric sulfate.

[0012] Preferably, the sustained-release material is polycaprolactone.

[0013] Preferably, the oxygenating agent is calcium peroxide.

[0014] Preferably, the microorganisms in the microbial powder are selected from at least one of the genera Micrococcus, Yeast, and Bacillus.

[0015] Furthermore, the Micrococcus genus includes Micrococcus lyrata and Micrococcus luteus, the Yeast genus includes Hansenula polymorpha, Candida albicans and Rhodotorula rubrum; the Bacillus genus includes Bacillus subtilis, Bacillus halophilus, Bacillus pumilus, Bacillus denitrificationus and Bacillus licheniformis.

[0016] Preferably, the concentration of live bacteria in the microbial powder is not less than 20 billion / g.

[0017] Preferably, the bentonite, iron powder, microbial powder, oxygen enhancer, sodium alginate, calcium nitrate and polymeric ferric sulfate are all in powder form and have a particle size of not less than 300 mesh.

[0018] The second aspect of the present application provides a preparation method of the above-mentioned multifunctional active slow-release water purification material, which comprises the following steps:

[0019] (a) mixing and stirring the microbial powder, oxygen enhancer and bentonite uniformly to obtain mixture 1;

[0020] (b) mixing and stirring the sodium alginate, calcium nitrate and polymeric ferric sulfate uniformly to obtain mixture 2;

[0021] (c) heating the slow-release material to 80-120℃, then adding iron powder under stirring and constant temperature conditions and stirring uniformly to obtain mixture 3;

[0022] (d) adding mixture 2 to mixture 3 and stirring uniformly, then cooling to 60-65℃, adding mixture 1 and continuing to stir until the material changes from a whole viscous substance to a dispersed small particle mass, and cooling to obtain the multifunctional active slow-release water purification material.

[0023] Preferably, the step (d) further comprises extrusion granulation before cooling.

[0024] Preferably, in the step (c), the stirring speed is 30-50 r / min.

[0025] Preferably, in the step (d), the stirring speed for adding mixture 2 to mixture 3 and stirring uniformly is 50-80 r / min.

[0026] Compared with the prior art, the present application has at least the following beneficial effects:

[0027] The raw materials for preparing the multifunctional active slow-release water purification material of the present application are all in dry state, and no solvent is added during the preparation process, so that there is almost no reaction between the raw materials, the reaction rate is reduced, and the shelf life of the finished product is prolonged.

[0028] The bentonite and iron powder are used as microbial adhesion core points in the multifunctional active slow-release water purification material, and a large number of nano active points are formed by the subsequent calcium salt and iron salt precipitation, so that the specific surface area is large, the adsorption performance is strengthened, the growth and reproduction of microorganisms are beneficial, and the problem of phosphate that is difficult to remove by traditional microbial agents is solved; in addition, the polycaprolactone is used as a slow-release material, which is environment-friendly and does not produce harmful substances after decomposition, the bentonite is used as a main additive, and the amount of polycaprolactone is controlled, so that the release rate is controlled.

[0029] The sodium alginate, calcium nitrate and polyferric sulfate can be cross-linked into active gel in the multifunctional active slow-release water purification material, the escaped gel layer is not only a place for microorganisms to survive, but also one of carbon bases for microorganisms, as a core structure of the material, has the physical adsorption, chemical adsorption effect and biological decomposition ability, and can continuously absorb surrounding pollutants for purification.

[0030] The multifunctional active slow-release water purification material can well achieve the purpose of simultaneous nitrification and denitrification under the action of oxygen supply agent and nitrate, has high phosphorus removal rate, and has important significance for water quality improvement, in addition, the raw materials used in the application have high synergistic effect with each other, and are indispensable, jointly regulate the growth of microorganisms and water purification, form a relatively stable microsystem, and the preparation process is simple and easy to operate, has no toxic and side effects on biology and environment, and has good application prospect in water pollution repair engineering. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0032] Figure 1 The monitoring result of COD after the multifunctional active slow-release water purification material of example 3 in the experimental example of the present application is processed;

[0033] Figure 2 The monitoring result of ammonia nitrogen, total nitrogen and total phosphorus after the multifunctional active slow-release water purification material of example 3 in the experimental example of the present application is processed;

[0034] Figure 3 The monitoring result of COD after the multifunctional active slow-release water purification material of example 4 in the experimental example of the present application is processed;

[0035] Figure 4 The monitoring result of ammonia nitrogen after the multifunctional active slow-release water purification material of example 4 in the experimental example of the present application is processed. DETAILED DESCRIPTION

[0036] The technical solutions of the present application will be described in detail below in combination with the embodiments. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, but cannot limit the protection scope of the present application.

[0037] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be understood as the general meanings understood by the skilled in the art to which the present application belongs.

[0038] The raw materials used in the following embodiments are as follows:

[0039] Micrococcus lylae: live bacteria content 200 billion per gram, from Shanghai Jiachu Biological Engineering Co., Ltd.;

[0040] Micrococcus luteus: live bacteria content 200 billion per gram, from Shanghai Jiachu Biological Engineering Co., Ltd.;

[0041] Hansenula: live bacteria content 200 billion per gram, from Ruichu Biological Technology (Jiangsu) Co., Ltd.;

[0042] Candida: live bacteria content 260 billion per gram, from Wuhan Lanna Bai Medicine Chemical Co., Ltd.;

[0043] Rhodotorula: live bacteria content 500 billion per gram, from Qingdao Nuosen Biological Technology Co., Ltd.;

[0044] Bacillus subtilis: live bacteria content 200 billion per gram, from Guangxi Nongbao Biological Engineering Co., Ltd.;

[0045] Bacillus halodurans: live bacteria content 200 billion per gram, from Shanghai Conservation Biological Technology Center;

[0046] Bacillus pumilus: live bacteria content 300 billion per gram, from Guangxi Nongbao Biological Engineering Co., Ltd.;

[0047] Bacillus denitrificans: live bacteria content 500 billion per gram, from Shanghai Xige Biological Technology Co., Ltd.;

[0048] Bacillus licheniformis: live bacteria content 1000 billion per gram, from Henan Xinyangyao Biological Enzyme Preparation Co., Ltd.

[0049] Example 1

[0050] The present embodiment is a multifunctional active slow-release water purification material, which is prepared from raw materials including the following weight parts:

[0051] The slow-release material 50 parts, bentonite 50 parts, microbial bacteria powder 20 parts, iron powder 15 parts, oxygen enhancer 10 parts, sodium alginate 15 parts, calcium nitrate 10 parts and polymeric ferric sulfate 10 parts, wherein the slow-release material is polycaprolactone; the oxygen enhancer is calcium peroxide; the bentonite, iron powder, microbial bacteria powder, oxygen enhancer, sodium alginate, calcium nitrate and polymeric ferric sulfate are all in powder form and the particle size is not less than 300 mesh; the viable bacteria concentration in the microbial bacteria powder is not less than 200 billion / g, and the microorganisms in the microbial bacteria powder are Micrococcus, Saccharomycetes and Bacillus in a mass ratio of 1:1:2, the Micrococcus includes equal amounts of Lactococcus raffinolactis and Micrococcus luteus, the Saccharomycetes includes equal amounts of Candida and Rhodotorula, and the Bacillus includes equal amounts of Bacillus subtilis, Bacillus halodurans, Bacillus pumilus, Bacillus denitrificans and Bacillus licheniformis;

[0052] The preparation method of the above-mentioned multifunctional active slow-release water purification material, the preparation method comprising the following steps:

[0053] (a) mixing and stirring the microbial bacteria powder, the oxygen enhancer and the bentonite uniformly to obtain mixture 1;

[0054] (b) mixing and stirring the sodium alginate, the calcium nitrate and the polymeric ferric sulfate uniformly to obtain mixture 2;

[0055] (c) heating the slow-release material to 120 DEG C, then, under the condition of constant temperature and 50 r / min stirring, adding the iron powder and stirring uniformly to obtain mixture 3;

[0056] (d) adding the mixture 2 to the mixture 3 and stirring uniformly at 80 r / min, then, cooling to 65 DEG C, adding the mixture 1 again and continuing to stir until the material changes from the whole viscous substance to the dispersed small particle mass, cooling, and the multifunctional active slow-release water purification material is obtained.

[0057] Example 2

[0058] The multifunctional active slow-release water purification material is prepared from the raw materials comprising the following weight parts:

[0059] The slow-release material 100 parts, bentonite 150 parts, microbial bacteria powder 10 parts, iron powder 40 parts, oxygen enhancer 20 parts, sodium alginate 10 parts, calcium nitrate 20 parts and polymeric ferric sulfate 15 parts, wherein the slow-release material is polycaprolactone; the oxygen enhancer is calcium peroxide; the bentonite, iron powder, microbial bacteria powder, oxygen enhancer, sodium alginate, calcium nitrate and polymeric ferric sulfate are all in powder form and the particle size is not less than 300 mesh; the viable bacteria concentration in the microbial bacteria powder is not less than 20 billion / g, and the microorganisms in the microbial bacteria powder are Micrococcus, Saccharomycetes and Bacillus in a mass ratio of 1:1:2, the Micrococcus includes equal amounts of Lactococcus raffinolactis and Micrococcus luteus, the Saccharomycetes includes equal amounts of Candida and Rhodotorula, and the Bacillus includes equal amounts of Bacillus subtilis, Bacillus halodurans, Bacillus pumilus, Bacillus denitrificans and Bacillus licheniformis.

[0060] The preparation method of the above-mentioned multifunctional active slow-release water purification material, the preparation method comprising the following steps:

[0061] (a) mixing and stirring the microbial bacteria powder, the oxygen enhancer and the bentonite uniformly to obtain mixture 1;

[0062] (b) mixing and stirring the sodium alginate, the calcium nitrate and the polymeric ferric sulfate uniformly to obtain mixture 2;

[0063] (c) heating the slow-release material to 80℃, then adding the iron powder under the condition of constant temperature and 30r / min stirring and stirring uniformly to obtain mixture 3;

[0064] (d) adding the mixture 2 to the mixture 3 and stirring at 50r / min, then cooling to 60℃, adding the mixture 1 and continuing to stir until the material changes from a whole viscous substance to a dispersed small particle mass, and cooling to obtain the multifunctional active slow-release water purification material.

[0065] Example 3

[0066] The present embodiment is a multifunctional active slow-release water purification material, which is prepared from raw materials comprising the following parts by weight:

[0067] The slow-release material 100 parts, bentonite 100 parts, microbial bacteria powder 20 parts, iron powder 30 parts, oxygen enhancer 15 parts, sodium alginate 15 parts, calcium nitrate 10 parts and polymeric ferric sulfate 10 parts, wherein the slow-release material is polycaprolactone; the oxygen enhancer is calcium peroxide; the bentonite, iron powder, microbial bacteria powder, oxygen enhancer, sodium alginate, calcium nitrate and polymeric ferric sulfate are all in powder form and the particle size is not less than 300 mesh; the viable bacteria concentration in the microbial bacteria powder is not less than 200 billion / g, and the microorganisms in the microbial bacteria powder are Micrococcus, Saccharomycetes and Bacillus in a mass ratio of 1:1:2, the Micrococcus includes equal amounts of Micrococcus lylae and Micrococcus luteus, the Saccharomycetes includes equal amounts of Candida and Rhodotorula, and the Bacillus includes equal amounts of Bacillus subtilis, Bacillus halodurans, Bacillus pumilus, Bacillus denitrificans and Bacillus licheniformis;

[0068] The preparation method of the above-mentioned multifunctional active slow-release water purification material, the preparation method comprising the following steps:

[0069] (a) mixing and stirring the microbial bacteria powder, the oxygen enhancer and the bentonite uniformly to obtain mixture 1;

[0070] (b) mixing and stirring the sodium alginate, the calcium nitrate and the polymeric ferric sulfate uniformly to obtain mixture 2;

[0071] (c) heating the slow-release material to 100 DEG C, then adding the iron powder under the condition of constant temperature and 40 r / min stirring and stirring uniformly to obtain mixture 3;

[0072] (d) adding the mixture 2 to the mixture 3 and stirring at 60 r / min, then cooling to 60 DEG C, adding the mixture 1 and continuing to stir until the material changes from a whole viscous substance to a dispersed small particle mass, extruding, granulating, cooling, and the multifunctional active slow-release water purification material is obtained.

[0073] Example 4

[0074] The multifunctional active slow-release water purification material is prepared from the raw materials comprising the following weight parts:

[0075] The slow-release material 100 parts, bentonite 120 parts, microbial bacteria powder 15 parts, iron powder 20 parts, oxygen enhancer 20 parts, sodium alginate 15 parts, calcium nitrate 20 parts and polymeric ferric sulfate 10 parts, wherein the slow-release material is polycaprolactone; the oxygen enhancer is calcium peroxide; the bentonite, iron powder, microbial bacteria powder, oxygen enhancer, sodium alginate, calcium nitrate and polymeric ferric sulfate are all in powder form and have a particle size of no less than 300 mesh; the concentration of live bacteria in the microbial bacteria powder is no less than 20 billion / g; the microorganisms in the microbial bacteria powder are in a mass ratio of 1:1:2 of Micrococcus, Saccharomycetes and Bacillus, the Micrococcus includes equal amounts of Lactococcus raffinolactis and Lactococcus garefroii, the Saccharomycetes includes equal amounts of Candida and Rhodotorula, and the Bacillus includes equal amounts of Bacillus subtilis, Bacillus halodurans, Bacillus pumilus, Bacillus denitrificans and Bacillus licheniformis;

[0076] The preparation method of the multifunctional active slow-release water purification material includes the following steps:

[0077] (a) mixing, stirring and uniformly mixing the microbial bacteria powder, oxygen enhancer and bentonite to obtain mixture 1;

[0078] (b) mixing, stirring and uniformly mixing the sodium alginate, calcium nitrate and polymeric ferric sulfate to obtain mixture 2;

[0079] (c) heating the slow-release material to 100 DEG C, then adding the iron powder under the condition of constant temperature and 40 r / min stirring and stirring uniformly to obtain mixture 3;

[0080] (d) adding mixture 2 to mixture 3 and stirring at 60 r / min, then cooling to 60 DEG C, adding mixture 1 and continuing to stir until the material changes from a whole viscous substance to a dispersed small particle mass, and cooling to obtain the multifunctional active slow-release water purification material.

[0081] Experimental example

[0082] The multifunctional active slow-release water purification materials prepared in Examples 3 and 4 are respectively obtained;

[0083] 1. 5 g of the multifunctional active slow-release water purification material prepared in Example 3 is added into a beaker containing 0.2 L of black and smelly sediment and 0.7 L of black and smelly overlying water, and another beaker containing the same volume of black and smelly sediment and black and smelly overlying water is prepared as a blank control group for experimental observation.

[0084] The COD, ammonia nitrogen, total nitrogen and total phosphorus of the water body are monitored, and the detection results are shown in Figure 1 、 Figure 2

[0085] It can be known from Figure 1 、 Figure 2 ​​

[0086] The multifunctional active slow-release material has good removal effect on various pollutants, and microorganisms are activated comprehensively within 2 days, and the removal efficiency is greatly enhanced.

[0087] 2. The multifunctional active slow-release water purification material prepared in Example 4 is added at the outlet and overflow area of a rural sewage treatment facility in a certain township, the adding area is 500 m 2 , the adding amount is 75 kg, the daily sewage treatment capacity is 1000 t / d, and the effluent of the sewage treatment facility and the water downstream of the added multifunctional active material are detected after adding, and the detection results are shown in Figure 3 、 Figure 4 ;

[0088] As can be seen from Figure 3 、 Figure 4 ,

[0089] After the fifth day of adding, the water purification is basically stable, the effluent can be purified to a certain extent, and the stable effluent is maintained.

[0090] Finally, it should be pointed out that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application.

Claims

1. A multifunctional active sustained-release water purification material, characterized in that, The multifunctional active slow-release water purification material is prepared from the following raw materials by weight: The slow-release material 50-100 parts, bentonite 50-150 parts, microbial powder 10-20 parts, iron powder 15-40 parts, oxygen enhancer 10-20 parts, sodium alginate 10-15 parts, calcium nitrate 10-20 parts, and polymeric ferric sulfate 10-15 parts; The slow-release material is polycaprolactone; The oxygen enhancer is calcium peroxide; The microorganism in the microbial powder is at least one selected from the group consisting of Micrococcus, Saccharomycetes, and Bacillus; The preparation method of the multifunctional active slow-release water purification material comprises the following steps: (a) uniformly mixing and stirring the microbial powder, the oxygen enhancer, and the bentonite to obtain a mixture 1; (b) uniformly mixing and stirring the sodium alginate, the calcium nitrate, and the polymeric ferric sulfate to obtain a mixture 2; (c) heating the slow-release material to 80-120°C, then adding the iron powder under stirring and constant temperature conditions and stirring uniformly to obtain a mixture 3; (d) adding the mixture 2 to the mixture 3 and stirring uniformly, then cooling to 60-65°C, adding the mixture 1, and continuing to stir until the material changes from a whole viscous substance to a dispersed small particle mass, and cooling to obtain the multifunctional active slow-release water purification material.

2. The multifunctional active sustained-release water purification material according to claim 1, characterized in that, The multifunctional active slow-release water purification material is prepared from the following raw materials by weight: The slow-release material 50-100 parts, bentonite 50-150 parts, microbial powder 10-20 parts, iron powder 15-40 parts, oxygen enhancer 10-20 parts, sodium alginate 10-15 parts, calcium nitrate 10-20 parts, and polymeric ferric sulfate 10-15 parts; 3. The multifunctional active sustained-release water purification material according to claim 1 or 2, characterized in that, The concentration of live bacteria in the microbial powder is not less than 20 billion / g.

4. The multifunctional active sustained-release water purification material according to claim 1 or 2, characterized in that, The bentonite, the iron powder, the microbial powder, the oxygen enhancer, the sodium alginate, the calcium nitrate, and the polymeric ferric sulfate are all in powder form and have a particle size of not less than 300 mesh.

5. The multifunctional active sustained-release water purification material according to claim 1, characterized in that, In the step (c), the stirring speed is 30-50 r / min.

6. The multifunctional active sustained-release water purification material according to claim 1, characterized in that, In the step (d), the stirring speed for adding the mixture 2 to the mixture 3 and stirring uniformly is 50-80 r / min.

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