CN112093832B - Preparation method of medicament for treating ammonia nitrogen wastewater - Google Patents
Preparation method of medicament for treating ammonia nitrogen wastewater Download PDFInfo
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- CN112093832B CN112093832B CN202010991989.2A CN202010991989A CN112093832B CN 112093832 B CN112093832 B CN 112093832B CN 202010991989 A CN202010991989 A CN 202010991989A CN 112093832 B CN112093832 B CN 112093832B
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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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- 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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- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
The invention relates to a wastewater treatment technologyThe technical field, in particular to a preparation method of a medicament for treating ammonia nitrogen wastewater, which adopts a modified solution A and a modified solution B to carry out modified treatment on solid powder mixed by zeolite powder and montmorillonite powder to obtain the medicament for treating the ammonia nitrogen wastewater; the modified solution A comprises NaCl and polyvinylpyrrolidone; the modified solution B comprises NaCl, phosphoric acid and Mg (OH) 2。 According to the invention, zeolite powder and montmorillonite powder are mixed and modified to prepare the molecular sieve for absorbing ammonia nitrogen through ion exchange, and the zeolite powder and montmorillonite are mixed, so that the porosity is increased, and the exchange adsorption efficiency is improved; the invention adopts the modification solution A and the modification solution B to carry out the modification process in sequence, utilizes the modification effect of NaCl and polyvinylpyrrolidone to improve the ammonia nitrogen absorption efficiency of ion exchange, and simultaneously utilizes phosphoric acid and Mg (OH) 2 Increasing the chemical precipitation capacity.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a preparation method of a medicament for treating ammonia nitrogen wastewater.
Background
The ammonia nitrogen wastewater mainly comes from chemical fertilizers, coking, petrifaction, pharmacy, foods, refuse landfills and the like, a large amount of ammonia nitrogen wastewater is discharged into a water body, so that water eutrophication is caused, black and odorous water is caused, the difficulty and cost of water supply treatment are increased, even toxic action is generated to crowds and organisms, and a blow-off method, an ion exchange method, a membrane separation method, an MAP precipitation method, a chemical oxidation method and a biological method are adopted for treating the ammonia nitrogen wastewater.
The stripping method is a method for separating ammonia nitrogen by utilizing the gas-liquid equilibrium relationship between the gas-phase concentration and the liquid-phase concentration of ammonia nitrogen under the alkaline condition, and the stripping efficiency is greatly influenced by temperature, PH and the gas-liquid ratio. The ion exchange method is to exchange cations in the molecular sieve with NH4+ in the wastewater to achieve the purpose of denitrification, and the regeneration problem of the molecular sieve seriously affects the application of the method. The membrane separation method is a method for removing ammonia nitrogen by utilizing the selective permeability of a membrane. The ammonia nitrogen removal efficiency is greatly influenced by concentration, pressure and temperature. The MAP precipitation method mainly utilizes the following chemical reactions: mg2+ + NH4+ + PO43- = MgNH4PO4 removes ammonia nitrogen in the waste water, and the method is high in cost and easy to generate secondary pollution. The chemical oxidation method is a method for removing ammonia nitrogen by directly oxidizing the ammonia nitrogen into nitrogen by using a strong oxidant, and the generated residual chlorine can cause secondary pollution. The biological denitrification method utilizes a two-stage activated sludge method, strong-oxidation aerobic biological treatment and short-cut nitrification and denitrification to treat ammonia nitrogen, and occupies a large area.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a low-cost, high-efficiency, green and environment-friendly medicament for treating ammonia nitrogen wastewater and a preparation method thereof.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
a preparation method of a medicament for treating ammonia nitrogen wastewater comprises the following steps:
1) Crushing zeolite, namely crushing the zeolite by adopting a crusher, and sieving by using a 50-100-mesh standard sieve to obtain zeolite powder;
2) Crushing montmorillonite, namely crushing montmorillonite by using a crusher, and sieving by using a standard sieve of 80-120 meshes to obtain montmorillonite powder;
3) Rinsing with methanol, namely mixing the zeolite powder obtained in the step 1) and the montmorillonite powder obtained in the step 2) according to a mass ratio of 1: (0.1-0.3), uniformly mixing, and rinsing with methanol for not less than 3 times to obtain mixed powder;
4) Drying, namely putting the mixed powder obtained in the step 3) into a drying oven, and drying for 3-6h at 30-60 ℃ to obtain dry mixed powder;
5) Preparing a modified solution A, namely preparing a 1.2-1.5mol/L NaCl solution, and adding 0.3-0.5% of polyvinylpyrrolidone into the NaCl solution to obtain the modified solution A;
6) Preparing modified solution B by diluting 85% phosphoric acid with 0.3-0.5mol/L NaCl solution 2-4 times, adding 10-20% Mg (OH) 2 Obtaining a modified solution B;
7) Immersing the dried mixed powder obtained in the step 4) into the modified solution A obtained in the step 5), heating to 40-60 ℃, uniformly stirring for 6-12h, taking out the powder, and drying for 3-5h at the temperature of 100-150 ℃ to obtain a first modified medicament;
8) Adding the first modified reagent obtained in the step 7) into the modified solution B obtained in the step 6), heating to 30-80 ℃, uniformly stirring for 5-10h, taking out the reagent, and drying at 200-300 ℃ for 1-2h to obtain the reagent for treating ammonia nitrogen wastewater.
Further, the zeolite in the step 1) is clinoptilolite.
Further, the mass ratio of the zeolite powder to the montmorillonite powder in the step 3) is preferably 1:0.15.
further, the concentration of the NaCl solution in the step 5) is preferably 1.2 mol/L.
Further, the proportion of polyvinylpyrrolidone in the step 5) is preferably 0.4%.
Further, the concentration of the NaCl solution in the step 6) is preferably 0.3mol/L.
Further, the dilution ratio in the step 6) is preferably 2 times.
Further, said Mg (OH) 2 The proportion is preferably 15%.
The agent is obtained by modifying mixed solid powder by adopting a modified solution A and a modified solution B; the modified solution A comprises NaCl and polyvinylpyrrolidone; the modified solution B comprises NaCl, phosphoric acid and Mg (OH) 2。
Compared with the prior art, the invention has the beneficial effects that:
1) According to the invention, zeolite powder and montmorillonite powder are mixed and modified to prepare the molecular sieve for absorbing ammonia nitrogen by ion exchange, and the zeolite powder and montmorillonite are mixed, so that the porosity is increased, and the exchange adsorption efficiency is improved;
2) The invention adopts the modification solution A and the modification solution B to carry out modification process in sequence, and utilizes the modification effect of NaCl and polyvinylpyrrolidone to promote separationEfficiency of ammonia nitrogen absorption by ion exchange while using phosphoric acid and Mg (OH) 2 Increasing the chemical precipitation capacity.
Detailed Description
The following detailed description of embodiments of the invention, but the invention can be practiced in many different ways, as defined and covered by the claims.
Example 1 preparation of agent for treatment of Ammonia Nitrogen wastewater
1) Crushing zeolite, namely crushing the zeolite by adopting a crusher, and sieving by using an 80-mesh standard sieve to obtain zeolite powder;
2) Crushing montmorillonite, namely crushing montmorillonite by using a crusher, and screening by using a 120-mesh standard sieve to obtain montmorillonite powder;
3) Rinsing with methanol, namely mixing the zeolite powder obtained in the step 1) and the montmorillonite powder obtained in the step 2) according to a mass ratio of 1:0.15, mixing, rinsing with methanol for 3 times to obtain mixed powder;
4) Drying, namely putting the mixed powder obtained in the step 3) into a drying oven, and drying for 3 hours at 60 ℃ to obtain dry mixed powder;
5) Preparing a modified solution A, namely preparing a 1.2mol/L NaCl solution, and adding 0.4% of polyvinylpyrrolidone into the NaCl solution to obtain the modified solution A;
6) Preparing modified solution B by diluting 85% phosphoric acid 2 times with 0.3mol/L NaCl solution, adding 15% Mg (OH) 2 Obtaining a modified solution B;
7) Immersing the dried mixed powder obtained in the step 4) into the modified solution A obtained in the step 5), heating to 60 ℃, uniformly stirring for 12 hours, taking out the powder, and drying for 3 hours at the temperature of 100 ℃ to obtain a first modified medicament;
8) Adding the first modified reagent obtained in the step 7) into the modified solution B obtained in the step 6), heating to 80 ℃, stirring and uniformly mixing for 5h, taking out the reagent, and drying for 2h at 300 ℃ to obtain the reagent for treating ammonia nitrogen wastewater.
Example 2 Ammonia-nitrogen wastewater treatment
2.1, collecting the ammonia nitrogen wastewater, adopting a Nassner reagent colorimetric method (GB 7479-87), taking potassium sodium tartrate as a masking agent under an alkaline condition, forming a yellow-brown complex by mercury potassium iodide and ammonium ions, measuring the absorbance of ammonia nitrogen by using a 721 type spectrophotometer, and solving the ammonia nitrogen concentration in the ammonia nitrogen wastewater according to a standard curve equation.
2.2 Preparation of ion exchange device, the medicament for treating ammonia nitrogen wastewater of the invention prepared in example 1 is filled into a cylindrical container, two ends are fixed by sieve plates, and a water inlet and a water outlet are arranged
2.3, treating ammonia nitrogen, namely injecting the wastewater collected in the step 2.1 into the ion exchange equipment prepared in the step 2.2, collecting the treated water through a water outlet, calculating the ammonia nitrogen residual concentration in the water according to a standard curve equation by adopting a Nagowski reagent colorimetric method (GB 7479-87), and calculating to obtain the ammonia nitrogen removal efficiency as high as 97.3%.
The embodiment shows that the method is low in cost, high in efficiency, green and environment-friendly, and suitable for large-scale application in ammonia nitrogen wastewater treatment.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (4)
1. The preparation method of the medicament for treating the ammonia nitrogen wastewater is characterized by comprising the following steps of:
1) Crushing zeolite, namely crushing the zeolite by adopting a crusher, and sieving by using a 50-100-mesh standard sieve to obtain zeolite powder;
2) Crushing montmorillonite, namely crushing montmorillonite by using a crusher, and sieving by using a standard sieve of 80-120 meshes to obtain montmorillonite powder;
3) Rinsing with methanol, namely mixing the zeolite powder obtained in the step 1) and the montmorillonite powder obtained in the step 2) according to a mass ratio of 1: (0.1-0.3), uniformly mixing, rinsing with methanol for at least 3 times to obtain mixed powder, wherein the mass ratio of the zeolite powder to the montmorillonite powder is 1:0.15;
4) Drying, namely putting the mixed powder obtained in the step 3) into a drying oven, and drying for 3-6h at 30-60 ℃ to obtain dry mixed powder;
5) Preparing a modified solution A, namely preparing 1.2-1.5mol/L NaCl solution, and adding 0.3-0.5% of polyvinylpyrrolidone into the NaCl solution to obtain the modified solution A;
6) Preparing modified solution B by diluting 85% phosphoric acid with 0.3-0.5mol/L NaCl solution 2-4 times, adding 10-20% Mg (OH) 2 Obtaining a modified solution B;
7) Immersing the dried mixed powder obtained in the step 4) into the modified solution A obtained in the step 5), heating to 40-60 ℃, uniformly stirring for 6-12h, taking out the powder, and drying at 100-150 ℃ for 3-5h to obtain a first modified medicament;
8) Adding the first modified reagent obtained in the step 7) into the modified solution B obtained in the step 6), heating to 30-80 ℃, uniformly stirring for 5-10h, taking out the reagent, and drying at 200-300 ℃ for 1-2h to obtain the reagent for treating ammonia nitrogen wastewater.
2. The method for preparing a medicament for treating ammonia nitrogen wastewater according to claim 1, wherein in the step 1), the zeolite is clinoptilolite.
3. The method for preparing the agent for treating the ammonia nitrogen wastewater according to claim 1, wherein the dilution ratio in the step 6) is 2 times.
4. The agent prepared by the preparation method of the agent for treating ammonia nitrogen wastewater according to any one of claims 1 to 3, which is characterized by being obtained by modifying mixed solid powder by adopting a modifying solution A and a modifying solution B;
the modified solution A comprises NaCl and polyvinylpyrrolidone;
the modified solution B comprises NaCl, phosphoric acid and Mg (OH) 2 。
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102527330A (en) * | 2012-01-30 | 2012-07-04 | 中国地质大学（武汉） | Preparation method of modified clinoptilolite ion exchanger |
| CN105152261A (en) * | 2015-09-01 | 2015-12-16 | 同济大学 | Reusable ammonia-nitrogen wastewater adsorbing agent preparation and regeneration using method |
| CN105693033A (en) * | 2016-04-06 | 2016-06-22 | 金华知产婺源信息技术有限公司 | Treatment system for removing ammonia nitrogen in domestic wastewater |
| CN105797679A (en) * | 2016-03-25 | 2016-07-27 | 江苏艾特克环境工程设计研究院有限公司 | Zeolite modifying method for removing ammonia nitrogen and phosphate radicals in waste water synchronously |
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- 2020-09-21 CN CN202010991989.2A patent/CN112093832B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102527330A (en) * | 2012-01-30 | 2012-07-04 | 中国地质大学（武汉） | Preparation method of modified clinoptilolite ion exchanger |
| CN105152261A (en) * | 2015-09-01 | 2015-12-16 | 同济大学 | Reusable ammonia-nitrogen wastewater adsorbing agent preparation and regeneration using method |
| CN105797679A (en) * | 2016-03-25 | 2016-07-27 | 江苏艾特克环境工程设计研究院有限公司 | Zeolite modifying method for removing ammonia nitrogen and phosphate radicals in waste water synchronously |
| CN105693033A (en) * | 2016-04-06 | 2016-06-22 | 金华知产婺源信息技术有限公司 | Treatment system for removing ammonia nitrogen in domestic wastewater |
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