CN111499000A - Constructed wetland filler and preparation method thereof - Google Patents
Constructed wetland filler and preparation method thereof Download PDFInfo
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- CN111499000A CN111499000A CN202010348667.6A CN202010348667A CN111499000A CN 111499000 A CN111499000 A CN 111499000A CN 202010348667 A CN202010348667 A CN 202010348667A CN 111499000 A CN111499000 A CN 111499000A
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F2003/001—Biological treatment of water, waste water, or sewage using granular carriers or supports for the microorganisms
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F2003/001—Biological treatment of water, waste water, or sewage using granular carriers or supports for the microorganisms
- C02F2003/003—Biological treatment of water, waste water, or sewage using granular carriers or supports for the microorganisms using activated carbon or the like
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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Abstract
The invention discloses an artificial wetland filler and a preparation method thereof, belonging to the technical field of environmental protection. It includes: 50-100 parts of activated sludge, 10-40 parts of blast furnace slag, 1-20 parts of carbon slag, 1-10 parts of bentonite, 1-5 parts of nitrogen adsorbent and 1-5 parts of phosphorus adsorbent. The raw materials of the invention are cheap and easy to obtain, the preparation is simple, and the prepared filler has the advantages of high strength, high hardness, difficult decomposition, good water permeability and strong adsorptivity to phosphorus and nitrogen.
Description
Technical Field
The invention relates to the technical field of environmental protection, in particular to an artificial wetland filler and a preparation method thereof.
Background
At present, the water environment condition of China is gradually worsened, the problems of lake eutrophication, red tide in coastal sea areas, organic pollution of rivers and reservoirs and the like appear, and the water diversion safety of residents and the health of people are threatened. The artificial wetland filler treatment has the characteristics of good water quality purification effect, low capital construction operating cost, low energy consumption, simple maintenance and management, strong impact load resistance and the like, and can provide habitats for wild animals and improve the aesthetic value of ecological landscape, so the artificial wetland filler treatment can be widely applied to the aspects of domestic sewage, industrial wastewater, agricultural non-point source sewage, urban storm runoff, eutrophic water bodies and the like. However, the constructed wetland filler has weak denitrification and dephosphorization capability in the prior engineering practice.
Disclosure of Invention
The invention aims to provide an artificial wetland filler and a preparation method thereof, and aims to solve the problem that the existing artificial wetland filler is poor in denitrification and dephosphorization capability.
The technical scheme for solving the technical problems is as follows:
an artificial wetland packing comprising: 50-100 parts of activated sludge, 10-40 parts of blast furnace slag, 1-20 parts of carbon slag, 1-10 parts of bentonite, 1-5 parts of nitrogen adsorbent and 1-5 parts of phosphorus adsorbent.
The activated sludge adopted by the invention is reserved in the sludge dewatering link of a sewage treatment plant, and contains a large amount of flocculants, mainly PAM and PAC, which are reserved in the sludge. Therefore, the activated sludge adopted by the invention contains a large amount of residual effective flocculation components, and the active components can play roles in adsorbing pollutants and purifying sewage for the artificial wetland. And the residual sludge and waste residues in the sewage treatment plant are supported by the filler, so that the problem of difficulty in treating the residual sludge is solved, and the environmental treatment concept of treating waste by waste and changing waste into valuable is realized.
In the filler, a large amount of effective flocculation components contained in the activated sludge can efficiently retain nitrogen and phosphorus elements in a water body for the growth of plants planted on a soil layer above the activated sludge. The blast furnace slag, the bentonite and the coal ash are used as auxiliary fillers, so that the fillers have the advantages of rough surface, high porosity, uniform distribution of a microporous structure, large specific surface area and high mechanical strength, the hydraulic performance of the artificial wetland can be improved, a larger attachment area is provided for microorganisms, the pollutant removal efficiency of a system is enhanced, and the wetland can be prevented from being blocked. And the nitrogen adsorbent and the phosphorus adsorbent are added to optimize the adsorption effect of the filler on nitrogen and phosphorus, the phosphorus and nitrogen removal adsorption capacity of the filler is far greater than that of the conventional adsorption material, the service life of the filler is prolonged, and the high cost caused by replacement is reduced.
Further, in a preferred embodiment of the present invention, the artificial wetland filler comprises: 60-80 parts of activated sludge, 20-30 parts of blast furnace slag, 5-15 parts of carbon slag, 3-7 parts of bentonite, 1-5 parts of nitrogen adsorbent and 1-5 parts of phosphorus adsorbent.
Further, in a preferred embodiment of the present invention, the water content of the activated sludge is less than 60%.
Further, in a preferred embodiment of the present invention, the preparation method of the nitrogen adsorbent comprises the following steps:
mixing sodium lignin sulfonate and active carbon according to the mass ratio of (80-100): 1 is dissolved in acetic acid solution to prepare 1 to 10 weight percent solution, and then is dripped into 10 to 20 weight percent sodium hydroxide solution, stirred and filtered to obtain beads;
(ii) adding the beads into a lanthanum chloride aqueous solution with the concentration of 1-5g/m L for soaking, fully adsorbing at 30-50 ℃, filtering, adding into epoxy chloropropane, adjusting the pH to 8-10, adding potassium persulfate, and reacting at 50-70 ℃ for 3-5h to obtain a nitrogen adsorbent;
wherein the mass ratio of the beads to the epichlorohydrin to the potassium persulfate is as follows: 1: (6-8): (0.01-0.02).
Further, in a preferred embodiment of the present invention, the method for preparing the phosphorus adsorbent comprises the following steps:
soaking activated bagasse in a cerium chloride solution with the concentration of 3-7g/m L, adjusting the pH value to 10-12, stirring for reaction for 1-2h, and washing and drying by ethanol to prepare an initial adsorbent;
(ii) dipping the initial adsorbent in a nano zirconium dioxide aqueous solution with the concentration of 1-2g/m L, filtering, washing and drying, and roasting at the temperature of 300-600 ℃ for 2-3h to prepare the phosphorus adsorbent.
Further, in a preferred embodiment of the present invention, the step of preparing activated bagasse in step (i) above comprises: adding bagasse into a culture solution, adding an acetic acid-sodium acetate buffer solution into the culture solution, adjusting the pH to 3, adding white rot fungi, reacting at the temperature of 30-35 ℃ for 36-45 h, taking out, drying and crushing to obtain modified bagasse with the particle size of 50 meshes; wherein the mass ratio of the bagasse to the culture solution to the white rot fungi is 1: (10-12): (3-5); the addition amount of the acetic acid-sodium acetate buffer solution is 10 to 20 weight percent of the culture solution; the culture solution comprises the following components in parts by weight: 2 parts of yeast powder, 10.4 parts of vitamin B, 1.5 parts of glucose, 1.5 parts of soluble starch and KH2PO40.2 part and MgSO4·7H20.5 part of O.
The preparation method of the artificial wetland filler comprises the following steps:
(1) fully grinding the blast furnace slag with the particle size of less than 200nm, adding an activating agent, stirring and mixing uniformly, and roasting at 400-600 ℃ for 0.5-1 h; the mass ratio of the blast furnace slag to the added activator is (100) -150: 1;
(2) grinding the calcined blast furnace slag again, adding water, uniformly mixing, heating to 80-90 ℃ from room temperature, preserving heat for 1-3h, and drying at 70-90 ℃;
(3) dissolving the stearic acid ester in ether, heating in water bath to completely dissolve the stearic acid ester to prepare a solution of 0.01-0.05g/m L, adding the dried blast furnace slag, bentonite and coal ash obtained in the step (2), and uniformly stirring and mixing to obtain a mixture;
(4) and adding the nitrogen adsorbent and the phosphorus adsorbent into the mixture, fully stirring and uniformly mixing, then stirring and uniformly mixing with the movable sludge, and carrying out compression molding and air drying to obtain the artificial wetland filler.
Further, in a preferred embodiment of the present invention, the activating agent in the step (1) is sodium hydroxide.
The invention has the following beneficial effects:
1. the active carbon added into the nitrogen adsorbent has stronger adsorbability and catalytic performance, and has stronger adsorbability to organic pollutants and some poisonous heavy metals dissolved in water; the added sodium lignosulfonate contains a large amount of straight-chain and polar groups, so that the adsorption of ammonia nitrogen can be improved. And lanthanum chloride is added as a modifier to assist in improving the adsorption capacity of the activated carbon and the sodium lignosulfonate on nitrogen, so that the nitrogen adsorbent is improved and the adsorption effect on nitrogen is improved.
2. The invention provides the adaptability of the phosphorus adsorbent to the environment by preparing the biochar-based phosphorus adsorbent, and the nano zirconium dioxide is added and is mainly combined and fixed on the surface of the phosphorus adsorbent through chelation, covalent bonds or coordination bonds with phosphate radicals, so that the adsorption effect on phosphorus is improved.
3. The raw materials of the invention are cheap and easy to obtain, the preparation is simple, and the prepared filler has the advantages of high strength, high hardness, difficult decomposition, good water permeability and strong adsorptivity to phosphorus and nitrogen.
Detailed Description
The principles and features of this invention are described below in conjunction with embodiments, which are included to explain the invention and not to limit the scope of the invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Example 1:
the constructed wetland filler of the embodiment comprises: the raw materials comprise, by weight, 50 parts of activated sludge, 10 parts of blast furnace slag, 1 part of carbon slag, 1 part of bentonite, 1 part of nitrogen adsorbent and 1 part of phosphorus adsorbent.
The preparation method of the nitrogen adsorbent comprises the following steps:
mixing sodium lignin sulfonate and active carbon according to the mass ratio of 80: 1 is dissolved in acetic acid solution to prepare 1 wt% solution, and then is dripped into 10 wt% sodium hydroxide solution, stirred and filtered to obtain beads;
(ii) adding the beads into a lanthanum chloride aqueous solution with the concentration of 1g/m L for soaking, fully adsorbing at 30 ℃, filtering, adding into epoxy chloropropane, adjusting the pH to 8, adding potassium persulfate, and reacting at the temperature of 50 ℃ for 3-5h to obtain a nitrogen adsorbent;
wherein the mass ratio of the beads to the epichlorohydrin to the potassium persulfate is as follows: 1: 6: 0.01.
the preparation method of the phosphorus adsorbent comprises the following steps:
the preparation method comprises the steps of adding bagasse into a culture solution, adding an acetic acid-sodium acetate buffer solution into the culture solution, adjusting the pH value to 3, adding white rot fungi, reacting at the temperature of 30 ℃ for 36 hours, taking out, drying and crushing to obtain the modified bagasse with the particle size of 50 meshes, wherein the mass ratio of the bagasse to the culture solution to the white rot fungi is 1: 10: 3, the addition amount of the acetic acid-sodium acetate buffer solution is 10 wt% of the culture solution, and the culture solution comprises the following components in parts by weight of 2 parts of yeast powder, 10.4 parts of vitamin B, 1.5 parts of glucose, 1.5 parts of soluble starch, 1.5 parts of KH (KHz)2PO40.2 part and MgSO4·7H20.5 part of O.
(ii) dipping the primary adsorbent in a nano zirconium dioxide aqueous solution with the concentration of 1g/m L, filtering, washing, drying, and roasting at the temperature of 300 ℃ for 2h to prepare the phosphorus adsorbent.
The preparation method of the artificial wetland filler of the embodiment comprises the following steps:
(1) fully grinding the blast furnace slag with the particle size of 150nm, adding an activating agent, stirring and mixing uniformly, and roasting at 400 ℃ for 0.5 h; the mass ratio of the blast furnace slag to the activator is 100: 1;
(2) grinding the calcined blast furnace slag again, adding water, uniformly mixing, heating to 80 ℃ from room temperature, keeping the temperature for 1h, and drying at 70 ℃;
(3) dissolving the stearic acid ester in ether, heating in water bath to completely dissolve the stearic acid ester to prepare a solution of 0.01g/m L, adding the dried blast furnace slag, bentonite and coal ash obtained in the step (2), and uniformly stirring and mixing to obtain a mixture;
(4) and adding the nitrogen adsorbent and the phosphorus adsorbent into the mixture, fully stirring and uniformly mixing, then stirring and uniformly mixing with the movable sludge, and carrying out compression molding and air drying to obtain the artificial wetland filler.
Example 2:
the constructed wetland filler of the embodiment comprises: the raw materials comprise, by weight, 60 parts of activated sludge, 20 parts of blast furnace slag, 5 parts of carbon slag, 3 parts of bentonite, 2 parts of nitrogen adsorbent and 2 parts of phosphorus adsorbent.
The preparation method of the nitrogen adsorbent comprises the following steps:
mixing sodium lignin sulfonate and active carbon according to the mass ratio of 90: 1 dissolving in acetic acid solution to prepare 5 wt% solution, dripping into 15 wt% sodium hydroxide solution, stirring, and filtering to obtain beads;
(ii) adding the beads into lanthanum chloride aqueous solution with the concentration of 3g/m L for soaking, fully adsorbing at 40 ℃, filtering, adding into epoxy chloropropane, adjusting the pH to 9, adding potassium persulfate, and reacting at 60 ℃ for 4 hours to obtain a nitrogen adsorbent;
wherein the mass ratio of the beads to the epichlorohydrin to the potassium persulfate is as follows: 1: 7: 0.015.
the preparation method of the phosphorus adsorbent comprises the following steps:
the preparation method comprises the steps of adding bagasse into a culture solution, adding an acetic acid-sodium acetate buffer solution into the culture solution, adjusting the pH value to 3, adding white rot fungi, reacting at the temperature of 32 ℃ for 40 hours, taking out, drying and crushing to obtain a modified bagasse with the particle size of 50 meshes, wherein the mass ratio of the bagasse to the culture solution to the white rot fungi is 1: 11: 4, the addition amount of the acetic acid-sodium acetate buffer solution is 15 wt% of the culture solution, and the culture solution comprises the following components in parts by weight of 2 parts of mother powder, 10.4 parts of vitamin B, 1.5 parts of glucose, 1.5 parts of soluble starch, and KH2PO40.2 part and MgSO4·7H20.5 part of O.
(ii) dipping the primary adsorbent in a nano zirconium dioxide aqueous solution with the concentration of 1.5g/m L, filtering, washing, drying, and roasting at the temperature of 450 ℃ for 3h to prepare the phosphorus adsorbent.
The preparation method of the artificial wetland filler of the embodiment comprises the following steps:
(1) fully grinding the blast furnace slag with the particle size of 150nm, adding an activating agent, stirring and mixing uniformly, and roasting at 500 ℃ for 1 h; the mass ratio of the blast furnace slag to the activator is 120: 1;
(2) grinding the calcined blast furnace slag again, adding water, uniformly mixing, heating to 85 ℃ from room temperature, keeping the temperature for 2 hours, and drying at 80 ℃;
(3) dissolving the stearic acid ester in ether, heating in water bath to completely dissolve the stearic acid ester to prepare a solution of 0.03g/m L, adding the blast furnace slag, the bentonite and the coal ash dried in the step (2), and uniformly stirring and mixing to prepare a mixture;
(4) and adding the nitrogen adsorbent and the phosphorus adsorbent into the mixture, fully stirring and uniformly mixing, then stirring and uniformly mixing with the movable sludge, and carrying out compression molding and air drying to obtain the artificial wetland filler.
Example 3:
the constructed wetland filler of the embodiment comprises: the raw materials comprise, by weight, 70 parts of activated sludge, 25 parts of blast furnace slag, 10 parts of carbon slag, 5 parts of bentonite, 3 parts of nitrogen adsorbent and 3 parts of phosphorus adsorbent.
The preparation method of the nitrogen adsorbent comprises the following steps:
mixing sodium lignin sulfonate and active carbon according to the mass ratio of 100:1 dissolving in acetic acid solution to prepare 10 wt% solution, dripping into 20 wt% sodium hydroxide solution, stirring, and filtering to obtain beads;
(ii) adding the beads into a lanthanum chloride aqueous solution with the concentration of 5g/m L for soaking, fully adsorbing at 50 ℃, filtering, adding into epoxy chloropropane, adjusting the pH value to 10, adding potassium persulfate, and reacting at 70 ℃ for 5 hours to obtain a nitrogen adsorbent;
wherein the mass ratio of the beads to the epichlorohydrin to the potassium persulfate is as follows: 1: 8: 0.02.
the preparation method of the phosphorus adsorbent comprises the following steps:
the method comprises the steps of adding bagasse into a culture solution, adding an acetic acid-sodium acetate buffer solution into the culture solution, adjusting the pH value to 3, adding white rot fungi, reacting at the temperature of 35 ℃ for 45 hours, taking out, drying and crushing to obtain the modified bagasse with the particle size of 50 meshes, wherein the mass ratio of the bagasse to the culture solution to the white rot fungi is 1: 12: 5, the addition amount of the acetic acid-sodium acetate buffer solution is 20 wt% of the culture solution, and the culture solution comprises the following components, by weight, 2 parts of yeast powder, 10.4 parts of vitamin B, 1.5 parts of glucose, 1.5 parts of soluble starch, 1.5 parts of KH (KH)2PO40.2 part and MgSO4·7H20.5 part of O.
(ii) dipping the primary adsorbent in a nano zirconium dioxide aqueous solution with the concentration of 2g/m L, filtering, washing, drying, and roasting at the temperature of 600 ℃ for 3h to prepare the phosphorus adsorbent.
The preparation method of the artificial wetland filler of the embodiment comprises the following steps:
(1) fully grinding the blast furnace slag with the particle size of 100nm, adding an activating agent, stirring and mixing uniformly, and roasting at 600 ℃ for 1 h; the mass ratio of the blast furnace slag to the activator is 150: 1;
(2) grinding the calcined blast furnace slag again, adding water, uniformly mixing, heating to 90 ℃ from room temperature, keeping the temperature for 3 hours, and drying at 90 ℃;
(3) dissolving the stearic acid ester in ether, heating in water bath to completely dissolve the stearic acid ester to prepare a solution of 0.05g/m L, adding the dried blast furnace slag, bentonite and coal ash obtained in the step (2), and uniformly stirring and mixing to obtain a mixture;
(4) and adding the nitrogen adsorbent and the phosphorus adsorbent into the mixture, fully stirring and uniformly mixing, then stirring and uniformly mixing with the movable sludge, and carrying out compression molding and air drying to obtain the artificial wetland filler.
Example 4:
the constructed wetland filler of the embodiment comprises: the composite material comprises, by weight, 80 parts of activated sludge, 30 parts of blast furnace slag, 15 parts of carbon slag, 7 parts of bentonite, 4 parts of nitrogen adsorbent and 4 parts of phosphorus adsorbent. Among them, the preparation methods of the nitrogen adsorbent and the phosphorus adsorbent were the same as those in example 1.
The method for preparing the artificial wetland filler in the embodiment is the same as that of the embodiment 1.
Example 5:
the constructed wetland filler of the embodiment comprises: the raw materials comprise, by weight, 100 parts of activated sludge, 40 parts of blast furnace slag, 20 parts of carbon slag, 10 parts of bentonite, 5 parts of nitrogen adsorbent and 5 parts of phosphorus adsorbent. Among them, the preparation methods of the nitrogen adsorbent and the phosphorus adsorbent were the same as those in example 1.
The method for preparing the artificial wetland filler in the embodiment is the same as that of the embodiment 1.
Comparative example 1
The artificial wetland filler of the comparison example comprises: 70 parts of activated sludge, 25 parts of blast furnace slag, 10 parts of carbon slag and 5 parts of bentonite.
The preparation method of the artificial wetland filler of the comparative example is the same as the preparation method of the artificial wetland filler of the example 3.
Comparative example 2
The formulation of the artificial wetland filler of this comparative example was identical to that of example 3, except that the preparation method was different.
The preparation method of the artificial wetland filler of the comparison example comprises the following steps:
grinding the blast furnace slag, uniformly stirring and mixing the ground blast furnace slag, activated sludge, carbon slag, bentonite, a nitrogen adsorbent and a phosphorus adsorbent, and then performing compression molding and air drying to prepare the artificial wetland filler.
The fillers prepared in examples 1 to 5 and the control were subjected to nitrogen and phosphorus adsorption test under the test conditions that 10g of the filler block was added to a solution containing 100 mg/L nitrogen and 25 mg/L phosphorus in 15m L and left to stand for 1 day.
Table 1 nitrogen and phosphorus removal rate of constructed wetland filler prepared in examples and comparative examples
As can be seen from the above table, the removal rate of ammonia nitrogen and phosphorus is obviously higher than that of the case of the comparative example 1 when the nitrogen adsorbent and the phosphorus adsorbent are added in the embodiment of the invention. Compared with the comparative example 2, the method has the advantage that the removal rate of ammonia nitrogen and phosphorus is improved when the blast furnace slag is activated.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. The constructed wetland filler is characterized by comprising: 50-100 parts of activated sludge, 10-40 parts of blast furnace slag, 1-20 parts of carbon slag, 1-10 parts of bentonite, 1-5 parts of nitrogen adsorbent and 1-5 parts of phosphorus adsorbent.
2. The constructed wetland filler according to claim 1, characterized by comprising: 60-80 parts of activated sludge, 20-30 parts of blast furnace slag, 5-15 parts of carbon slag, 3-7 parts of bentonite, 1-5 parts of nitrogen adsorbent and 1-5 parts of phosphorus adsorbent.
3. The artificial wetland filler according to claim 1 or 2, characterized in that the water content of the activated sludge is less than 60%.
4. The artificial wetland filler according to claim 1 or 2, wherein the preparation method of the nitrogen adsorbent comprises the following steps:
mixing sodium lignin sulfonate and active carbon according to the mass ratio of (80-100): 1 is dissolved in acetic acid solution to prepare 1 to 10 weight percent solution, and then is dripped into 10 to 20 weight percent sodium hydroxide solution, stirred and filtered to obtain beads;
(ii) adding the beads into a lanthanum chloride aqueous solution with the concentration of 1-5g/m L for soaking, fully adsorbing at 30-50 ℃, filtering, adding into epoxy chloropropane, adjusting the pH to 8-10, adding potassium persulfate, and reacting at 50-70 ℃ for 3-5h to obtain a nitrogen adsorbent;
wherein the mass ratio of the beads to the epichlorohydrin to the potassium persulfate is as follows: 1: (6-8): (0.01-0.02).
5. The artificial wetland filler according to claim 1 or 2, wherein the preparation method of the phosphorus adsorbent comprises the following steps:
soaking activated bagasse in a cerium chloride solution with the concentration of 3-7g/m L, adjusting the pH value to 10-12, stirring for reaction for 1-2h, and washing and drying by ethanol to prepare an initial adsorbent;
(ii) dipping the initial adsorbent in a nano zirconium dioxide aqueous solution with the concentration of 1-2g/m L, filtering, washing and drying, and roasting at the temperature of 300-600 ℃ for 2-3h to prepare the phosphorus adsorbent.
6. The constructed wetland filler of claim 5, wherein the activated bagasse in step (i) is prepared by the steps of: adding bagasse into a culture solution, adding an acetic acid-sodium acetate buffer solution into the culture solution, adjusting the pH to 3, adding white rot fungi, reacting at the temperature of 30-35 ℃ for 36-45 h, taking out, drying and crushing to obtain modified bagasse with the particle size of 50 meshes;
wherein the mass ratio of the bagasse to the culture solution to the white rot fungi is 1: (10-12): (3-5); the addition amount of the acetic acid-sodium acetate buffer solution is 10 to 20 weight percent of the culture solution; the culture solution comprises the following components in parts by weight: 2 parts of yeast powder, 10.4 parts of vitamin B, 1.5 parts of glucose, 1.5 parts of soluble starch and KH2PO40.2 part and MgSO4·7H20.5 part of O.
7. The method for preparing the artificial wetland filler according to any one of claims 1 to 6, characterized by comprising the following steps:
(1) fully grinding the blast furnace slag with the particle size of less than 200nm, adding an activating agent, stirring and mixing uniformly, and roasting at 400-600 ℃ for 0.5-1 h; the mass ratio of the blast furnace slag to the added activator is (100) -150: 1;
(2) grinding the calcined blast furnace slag again, adding water, uniformly mixing, heating to 80-90 ℃ from room temperature, preserving heat for 1-3h, and drying at 70-90 ℃;
(3) dissolving the stearic acid ester in ether, heating in water bath to completely dissolve the stearic acid ester to prepare a solution of 0.01-0.05g/m L, adding the dried blast furnace slag, bentonite and coal ash obtained in the step (2), and uniformly stirring and mixing to obtain a mixture;
(4) and adding the nitrogen adsorbent and the phosphorus adsorbent into the mixture, fully stirring and uniformly mixing, then stirring and uniformly mixing with the movable sludge, and carrying out compression molding and air drying to obtain the artificial wetland filler.
8. The method for preparing the filler for artificial wetlands according to claim 7, wherein the activating agent in the step (1) is sodium hydroxide.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113060823A (en) * | 2021-03-24 | 2021-07-02 | 中国科学院生态环境研究中心 | Constructed wetland filler and preparation method thereof |
| CN113200602A (en) * | 2021-05-12 | 2021-08-03 | 铁汉山艺环境建设有限公司 | Preparation method of microorganism reinforced immobilized filler for treating urban black and odorous water body |
| CN113860497A (en) * | 2021-10-14 | 2021-12-31 | 淄博瀚宸环保科技有限公司 | Urban and municipal sewage nitrogen and phosphorus removal filler and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201770574U (en) * | 2010-06-02 | 2011-03-23 | 上海市政工程设计研究总院 | Rural domestic wastewater treatment system using composite-anaerobic and constructed-wetland combined treatment process |
| CN102703155A (en) * | 2012-06-27 | 2012-10-03 | 环境保护部南京环境科学研究所 | Biomass fuel based on sludge, straw and raw coal, preparation method of biomass fuel and application of fuel slag |
| CN102874930A (en) * | 2012-09-21 | 2013-01-16 | 中国矿业大学 | Dedicated filler for constructed wetland and preparation method for filler |
-
2020
- 2020-04-28 CN CN202010348667.6A patent/CN111499000B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN102874930A (en) * | 2012-09-21 | 2013-01-16 | 中国矿业大学 | Dedicated filler for constructed wetland and preparation method for filler |
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