CN115259500A - Method for treating ammonium nitrate industrial wastewater - Google Patents

Method for treating ammonium nitrate industrial wastewater Download PDF

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Publication number
CN115259500A
CN115259500A CN202210993855.3A CN202210993855A CN115259500A CN 115259500 A CN115259500 A CN 115259500A CN 202210993855 A CN202210993855 A CN 202210993855A CN 115259500 A CN115259500 A CN 115259500A
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ammonium nitrate
industrial wastewater
wastewater
nitrate
treating
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Inventor
徐玉森
王宏武
蔺洪永
张�杰
张晓威
马萌萌
王亚辉
范延武
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Central Plains Environmental Protection Co ltd
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Central Plains Environmental Protection Co ltd
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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
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • 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
    • C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
    • 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
    • C02F1/30—Treatment of water, waste water, or sewage by irradiation
    • 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
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • 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
    • C02F2101/163—Nitrates
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/10—Photocatalysts

Abstract

The invention provides a method for treating ammonium nitrate industrial wastewater, which comprises the following steps: mixing ammonium nitrate industrial wastewater and a glucose solution, reacting for a period of time, and filtering to obtain denitration wastewater; and step two, carrying out ammonia stripping reaction on the denitration wastewater, and sending the wastewater into a sewage plant for treatment after ammonia stripping. According to the method for treating the ammonium nitrate industrial wastewater, the glucose solution is adopted to react with the ammonium nitrate industrial wastewater before an ammonia stripping process, and under the condition of illumination, hydroxyl groups and nitrate ions in glucose are subjected to substitution reaction to generate white strip-shaped precipitates which can be doped into organic fertilizers so as to realize waste utilization. By controlling the dosage of glucose, the removal rate of nitrate ions can reach more than 70 percent, no harmful gas is generated in the removal process, the precipitate waste can be recycled, the cost is low, the nitrogen removal rate is high, the method is green and environment-friendly, and the method is suitable for industrial continuous production.

Description

Method for treating ammonium nitrate industrial wastewater
Technical Field
The invention belongs to the technical field of wastewater treatment, and particularly relates to a method for treating ammonium nitrate industrial wastewater.
Background
In nitrate production plants in the ammonia synthesis industry, when nitric acid is introduced into ammonia gas to produce ammonium nitrate, a large amount of heat is released, and the heat is dissipated along with water vapor. Because of violent reaction, a large amount of ammonium nitrate comes out along with the water vapor, the content of the ammonium nitrate in the condensed water vapor is generally 7 to 10 weight percent, and the condensed water has no recovery value in view of cost and is often used as industrial wastewater to be sent to a sewage treatment plant for treatment.
The multistage AO process is mostly selected for ammonium nitrate sewage treatment, and the process has the biggest characteristic of high denitrification efficiency. However, the total nitrogen content of 7-10wt% ammonium nitrate solution is about 20000-30000mg/l, wherein the ammonia nitrogen content is half of that, namely 10000-15000mg/l, the ammonia nitrogen content is high, and the wastewater enters a sewage plant and organisms cannot directly bear the wastewater.
At present, three kinds of ammonium nitrate wastewater treatment processes are provided: membrane treatment, electrodialysis and ammonia stripping membrane treatment; because the concentration of condensed water is high, the membrane is frequently backwashed in the membrane treatment process, the replacement period is short, the generated concentrated solution needs to be additionally treated, and the cost is higher. The electrodialysis process has the efficiency of 90 percent at most, concentration polarization is inevitable, a permeable membrane diffusion phenomenon also occurs, the total nitrogen content of the treated wastewater can reach 2000-3000mg/l, and the wastewater cannot be directly discharged to a sewage plant.
The ammonia stripping process is a process combining chemical process and biological treatment, and mainly comprises the following process steps: ammonium nitrate wastewater is subjected to ammonia stripping, methanol denitrification and further treatment in a sewage plant; wherein, the waste methanol is added for denitrification reaction after the ammonia stripping process, and the denitrifying bacteria are utilized to promote the reaction of the methanol and the nitrate to generate nitrogen and carbon dioxide, thereby removing nitrate ions. However, the nitrate radical solidified by the denitrification of the methanol is converted into nitrogen and discharged into the atmosphere, even can not be completely converted into the nitrogen, and excessive products such as nitrogen oxides are also generated and discharged into the atmosphere, so that the greenhouse gas emission is caused. The methanol is oxidized into carbon dioxide and is discharged into the atmosphere, thereby causing greenhouse effect on the atmosphere; in addition, the treatment cost is higher, and the cost of treating ton is as high as 70-120 yuan.
Therefore, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
Disclosure of Invention
The invention aims to provide a method for treating ammonium nitrate industrial wastewater, which is used for solving the problems that the existing ammonium nitrate wastewater treatment is easy to cause pollution to the atmosphere and has higher cost.
In order to achieve the above purpose, the invention provides the following technical scheme:
a method for treating ammonium nitrate industrial wastewater, which comprises the following steps:
mixing ammonium nitrate industrial wastewater and a glucose solution, reacting for a period of time, and filtering to obtain denitration wastewater;
and step two, carrying out ammonia stripping reaction on the denitration wastewater, and sending the wastewater into a sewage plant for treatment after ammonia stripping.
In the method for treating ammonium nitrate industrial wastewater as described above, preferably, the content of nitrogen in nitrate ions in the ammonium nitrate industrial wastewater is 3 to 15g/L.
In the method for treating the ammonium nitrate industrial wastewater, the molar ratio of the nitrate ions to the glucose in the ammonium nitrate industrial wastewater is preferably (2.5-35): 1.
In the method for treating ammonium nitrate industrial wastewater as described above, preferably, the molar ratio of nitrate ions to glucose in the ammonium nitrate industrial wastewater is 7.5.
In the method for treating the ammonium nitrate industrial wastewater, preferably, in the step one, the reaction time is 35-55h.
In the method for treating ammonium nitrate industrial wastewater as described above, preferably, in the step one, the reaction time is 48 hours.
In the ammonium nitrate industrial wastewater treatment method, preferably, in the first step, photocatalysis is adopted, and the reaction is performed under the irradiation of a light source, wherein the light source is natural light or a fluorescent lamp.
In the method for treating ammonium nitrate industrial wastewater, preferably, in the first step, the catalyst ethanol is added into the ammonium nitrate industrial wastewater, and 6-10mL of ethanol is added into each liter of ammonium nitrate industrial wastewater;
preferably, the catalyst KOH is added into the ammonium nitrate industrial wastewater, and 0.3 to 0.7g of KOH is added into each liter of ammonium nitrate industrial wastewater.
In the method for treating ammonium nitrate industrial wastewater as described above, preferably, the catalysts ethanol and KOH are added to the ammonium nitrate industrial wastewater, and 8mL of ethanol and 0.5g of KOH are added per liter of the ammonium nitrate industrial wastewater.
In the method for treating ammonium nitrate industrial wastewater, preferably, the ammonia stripping reaction specifically comprises: adding alkali liquor into the denitration wastewater, and removing generated ammonia gas in an ammonia stripping tower; the mol ratio of the ammonium ions to the alkali liquor in the denitration wastewater is 1.05.
Has the advantages that:
according to the method for treating the ammonium nitrate industrial wastewater, the glucose solution is adopted to react with the ammonium nitrate industrial wastewater before an ammonia stripping process, hydroxyl groups and nitrate ions in glucose are subjected to substitution reaction under the illumination condition to generate white strip-shaped precipitates, and the white strip-shaped precipitates can be doped into organic fertilizer, so that the content of organic matters and the content of nitrogen are increased, and the waste is utilized.
By controlling the dosage of glucose, nitrate ions can be effectively removed, the removal rate of the nitrate ions can reach more than 70 percent, no harmful gas is generated in the removal process, the precipitate waste is recycled, the cost is low, the nitrogen removal rate is high, and the method is green and environment-friendly and is suitable for industrial continuous production and use.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
The present invention will be described in detail with reference to examples. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention provides a method for treating ammonium nitrate industrial wastewater, which contains a large amount of ammonium ions and nitrate ions, can directly send the wastewater into a sewage treatment plant after reducing the content of the ammonium ions and the nitrate ions, and can obtain water capable of being recycled through biodegradation. Currently, the existing ammonium nitrate industrial wastewater treatment method adopts ammonia stripping and methanol denitrification treatment to finally generate N which can be discharged into the atmosphere 2 And CO 2 But nitrogen oxides are inevitably generated in the process, and the gases are discharged into the atmosphere to cause pollution and greenhouse effect. The treatment method of the invention adopts the mixing of the ammonium nitrate industrial wastewater and the glucose, the reaction is carried out under the illumination to generate the strip-shaped precipitate, the proportion of the white strip-shaped precipitate is close to that of water, the white strip-shaped precipitate is in a suspension state and can be removed after being filtered, the removal efficiency of nitrate ions is up to more than 70 percent, no gas or other pollutants are generated in the process, and the precipitate can be doped into organic fertilizer for use and recycled, thereby having good economic effect and positive social influence.
The invention provides a method for treating ammonium nitrate industrial wastewater, which comprises the following steps:
mixing ammonium nitrate industrial wastewater and a glucose solution, reacting for a period of time, and filtering to obtain denitration wastewater;
and step two, carrying out ammonia stripping reaction on the denitration wastewater, and sending the wastewater into a sewage plant for treatment after ammonia stripping.
In the specific embodiment of the invention, the nitrogen content in the nitrate ions in the ammonium nitrate industrial wastewater is 3-15g/L (such as 4g/L, 5g/L, 6g/L, 7g/L, 8g/L, 9g/L, 10g/L, 12g/L and 14 g/L). Namely, the concentration of nitrate ions in the ammonium nitrate industrial wastewater is 13-66g/L (such as 14g/L, 20g/L, 25g/L, 30g/L, 35g/L, 40g/L, 45g/L, 50g/L, 55g/L and 60 g/L). The glucose and the nitrate ions are subjected to substitution reaction after being added, the ammonium ions do not react, the ion concentration of the nitrate required in the industrial wastewater is kept within a certain range, the reaction is not obvious when the nitrogen content in the nitrate ions is less than 3g/L, the precipitation reaction can be carried out only when the nitrogen content in the nitrate ions is more than 3g/L, the reaction degree of the glucose and the wastewater is improved along with the increase of the concentration of the nitrate ions, and the removal rate of the nitrate ions is improved. When the concentration of nitrate ions is 10g/L under the condition of adding the catalyst by illumination for 48h, 55 percent of nitrate is precipitated, and when the concentration of nitrate ions is 15g/L (the highest concentration of condensed water), 75 percent of nitrate is precipitated. Glucose firstly adsorbs nitrate ions in the wastewater solution, and when the concentration of the nitrate ions reaches a certain value, a substitution reaction can be carried out to generate white strip-shaped precipitate.
In the specific embodiment of the invention, the molar ratio of nitrate ions to glucose in the ammonium nitrate industrial wastewater is (2.5-35) 1 (such as 3. Nitrate radical mainly reacts with hydroxyl in glucose to generate substitution reaction, gas is not generated, only precipitate is generated, and nitrate radical and methanol react under the action of denitrifying bacteria to generate N 2 And CO 2 The two have different chemical reaction principles. The molar ratio of nitrate ions to hydroxyl groups in glucose is (0.5-7) 1 (for example, 1. Preferably, the molar ratio of the nitrate ions to the glucose in the ammonium nitrate industrial wastewater is 7.5.
In the specific embodiment of the invention, in the first step, the ammonium nitrate industrial wastewater and the glucose solution are mixed and reacted, the reaction adopts photocatalytic irradiation, and the reaction is carried out for 35-55h (such as 36h, 38h, 40h, 42h, 44h, 46h, 48h, 50h, 52h and 54 h) under the irradiation of a light source. Preferably, the reaction time is 48h. After 48h, the reaction was substantially complete and the concentration of nitrate ions in the solution did not change much as the reaction time increased.
In a specific embodiment of the invention, the light source is sunlight or a fluorescent lamp, and the light source reacts under the direct irradiation of the sunlight or the fluorescent lamp. The reaction speed can be accelerated under the direct irradiation of sunlight or a fluorescent lamp, and the reaction speed is not obviously accelerated under the irradiation of ultraviolet light.
In the specific embodiment of the invention, in the first step, the catalyst ethanol is added into the ammonium nitrate industrial wastewater, and 6-10mL (such as 7mL, 8mL, 9mL and 9.5 mL) of ethanol is added into each liter of the ammonium nitrate industrial wastewater, and 8mL is preferred; the ethanol is added into the wastewater to play two roles, on one hand, the polarity of water can be reduced, and the solubility of glucose is increased; on the other hand, by reducing the polarity of water, more hydroxyl groups in the glucose are exposed, so that the reaction degree of the hydroxyl groups and the nitrate radical is improved, and the removal rate of the nitrate radical is improved.
In the embodiment of the invention, in the first step, the catalyst KOH is added into the ammonium nitrate industrial wastewater, and 0.3-0.7g (such as 0.35g, 0.4g, 0.45g, 0.5g, 0.55g, 0.6g, 0.65 g) of KOH is added into each liter of the ammonium nitrate industrial wastewater, and preferably 0.5g is added into each liter of the ammonium nitrate industrial wastewater. The alkaline catalyst KOH can accelerate the reaction rate and the reaction degree of glucose and nitrate ions.
Preferably, the catalysts ethanol and KOH can be added into the ammonium nitrate industrial wastewater, and 8ml of ethanol and 0.5g of KOH are added into each liter of the ammonium nitrate industrial wastewater, so that the reaction rate and the reaction degree of glucose and nitrate ions can be improved to the maximum extent under the combined catalytic action of the ethanol and the KOH.
In the specific embodiment of the invention, the ammonia stripping reaction specifically comprises the following steps: adding alkali liquor into the denitration wastewater, and removing generated ammonia gas in an ammonia stripping tower; the mol ratio of ammonium ions to alkali liquor in the denitration wastewater is 1.05, and the wastewater after deamination satisfies that the pH value is more than or equal to 9. The wastewater with pH value more than or equal to 9 after deamination can be directly sent to a sewage treatment plant for further treatment. Ammonia stripping is not efficient below pH 9, and lye is wasted if pH is too high, preferably pH =9. Under the condition of the mol ratio, the complete stripping can be ensured as far as possible, the addition amount of alkali is properly increased, the increase amplitude is 5 percent, the pH value is close to 9, and the treated wastewater can be directly sent to a sewage treatment plant for treatment.
Example 1
In the method for treating ammonium nitrate industrial wastewater provided by this embodiment, through detecting ions in wastewater, the content of N in ammonium ions in wastewater is [ NH ] 4 + -N]=13.8g/L =0.99mol/L, nitrogen content in nitrate ion is [ NO 3 -1 -N]＝14.2g/L＝1.01mol/L。
Step one, mixing 1L of ammonium nitrate industrial wastewater with glucose with different qualities, reacting for 48 hours under the irradiation of a fluorescent lamp, filtering a generated precipitate after the reaction, then carrying out ion detection again on the wastewater after the reaction, testing the content of nitrate radicals in the wastewater, and calculating the removal rate and the reaction phenomenon of the nitrate radicals, wherein the results are shown in the following table 1.
Figure BDA0003804841500000061
As can be seen from table 1 above, when the molar ratio of the hydroxyl groups of nitrate to glucose is 7; when the hydroxyl molar ratio of nitrate radical to glucose is 1.5; with the increase of the glucose content, the amount of white zonal precipitates is gradually reduced, and the removal rate of nitrate radicals is reduced; when the glucose content continues to increase and the molar ratio of nitrate radicals to hydroxyl radicals of glucose is 7.
Therefore, when the molar ratio of the nitrate to the hydroxyl of the glucose is 1.5.
Secondly, performing ammonia stripping reaction on the ammonium nitrate wastewater subjected to the glucose mixing reaction in an ammonia stripping tower, and adding NaOH solution and NH 4 + And OH - The molar ratio of (1).
Example 2
In the method for treating ammonium nitrate industrial wastewater provided by the embodiment, ions in the wastewater are detected, and the nitrogen content in nitrate ions is 15g/L.
Mixing 1L of ammonium nitrate industrial wastewater with glucose, wherein the molar ratio of nitrate ions to glucose is 7.5:1, reacting for 48 hours under the irradiation of a fluorescent lamp to generate white band-shaped precipitates after the reaction, filtering the precipitates, and then carrying out ion detection again on the wastewater after the reaction to test the nitrate content in the wastewater, wherein the removal rate of the nitrate is 72%.
Example 3
In the method for treating ammonium nitrate industrial wastewater provided by the embodiment, ions in the wastewater are detected, and the nitrogen content in nitrate ions is 3g/L.
Mixing 1L of ammonium nitrate industrial wastewater with glucose, wherein the molar ratio of nitrate ions to glucose is 7.5:1, reacting for 48 hours under the irradiation of a fluorescent lamp, wherein no white strip precipitate exists in the reaction process, the content of nitrate radical in the wastewater is tested, and the content of nitrogen in nitrate radical ions in the wastewater is still 3g/L.
Example 4
In the method for treating ammonium nitrate industrial wastewater provided by the embodiment, ions in the wastewater are detected, and the nitrogen content in nitrate ions is 10g/L.
Mixing 1L of ammonium nitrate industrial wastewater with glucose, wherein the molar ratio of nitrate ions to glucose is 7.5:1, reacting for 48 hours under the irradiation of a fluorescent lamp to generate white band-shaped precipitates after the reaction, filtering the precipitates, and then carrying out ion detection again on the wastewater after the reaction to test the nitrate content in the wastewater, wherein the removal rate of the nitrate is 50%.
Example 5
The difference between this example and example 1.3 is that the reaction time in step one is changed to 35h, and other method steps are the same as example 1.3 and are not repeated herein.
In this example, the nitrate content in the wastewater was calculated by filtering the white band-like precipitate obtained by the reaction during the reaction, and the removal rate of nitrate was 52.3%.
Example 6
The difference between this example and example 1.3 is that the reaction time in step one is changed to 55h, and the other method steps are the same as example 1.3 and are not repeated herein.
In this example, the nitrate content in the wastewater was calculated by filtering the white band-like precipitate obtained by the reaction, and the nitrate removal rate was 61.6%.
Example 7
The difference between this example and example 1.3 is that in step one, 8mL of ethanol as a catalyst is added into 1L of ammonium nitrate industrial wastewater, and the other method steps are the same as example 1.3 and are not repeated herein.
In this example, the nitrate content in the wastewater was calculated by filtering the white band-like precipitate obtained by the reaction, and the removal rate of nitrate was 64.5%.
Example 8
The difference between this example and example 1.3 is that in step one, 0.5g koh is added into 1L ammonium nitrate industrial wastewater, and other method steps are the same as example 1.3 and are not repeated herein.
In this example, the nitrate content in the wastewater was calculated by filtering the white band-like precipitate obtained by the reaction, and the nitrate removal rate was 62.3%.
Example 9
The difference between this example and example 1.3 is that in step one, 8mL of ethanol and 0.5g of KOH as catalysts are added into 1L of ammonium nitrate industrial wastewater, and the other method steps are the same as example 1.3 and are not repeated herein.
In this example, the nitrate content in the wastewater was calculated by filtering the white band-shaped precipitate obtained by the reaction, and the nitrate removal rate was 68.7% after 48 hours of the reaction.
And (5) performing an experiment again, wherein the removal rate of the obtained nitrate radical is 60.7 percent after reacting for 40 hours.
Comparative example 1
The difference between this embodiment and embodiment 1.3 is that the fluorescent lamp irradiation is not performed in step one, and the other method steps are the same as embodiment 1.3, and are not described again here.
In this example, white band-like precipitates were formed during the reaction, but the rate of formation of white band-like precipitates was slow, and the nitrate removal rate was 54.5% when the nitrate content in the wastewater was calculated after filtration.
The reaction time in the first step is prolonged to 55h, and the removal rate of nitrate radical is 58.1%. The method shows that when the fluorescent lamp is not used for irradiation, the removal rate of the nitrate radical can not reach the removal rate of the nitrate radical irradiated by the fluorescent lamp even if the reaction time is prolonged, the reaction speed can be accelerated by adopting the illumination, and meanwhile, the removal effect of the nitrate radical is improved.
Comparative example 2
The difference between this embodiment and embodiment 1.3 is that ultraviolet lamp irradiation is adopted in step one, and the other method steps are the same as embodiment 1.3, and are not described herein again.
In this example, white band-like precipitates were formed during the reaction, but the rate of formation of white band-like precipitates was slow, and the nitrate removal rate was 54.5% when the nitrate content in the wastewater was calculated after filtration.
It is demonstrated that the ultraviolet lamp irradiation does not achieve the purpose of accelerating the reaction speed.
When the ammonium nitrate industrial wastewater is industrially applied and produced, a mixing and stirring container, a reaction tank and a filtering tank can be arranged by adopting a continuous precipitation method, the ammonium nitrate industrial wastewater is introduced into the mixing and stirring container, glucose powder, a certain amount of catalyst ethanol and potassium hydroxide are added to improve the reaction speed and the reaction degree, the mixture is conveyed into the reaction tank through a flowmeter immediately after being uniformly stirred and mixed, and a guide plate is arranged in the reaction tank to ensure that the retention time of a solution in the reaction tank is kept at 48 hours without stirring in the process. The reaction tank is irradiated by a fluorescent lamp, so that the reaction speed is accelerated, and the fluorescent lamp can be preferably irradiated to the bottom of the tank. And (3) conveying the mixture of the reacted liquid and the precipitate to a filter tank, conveying the liquid obtained after filtering to an ammonia stripping tower for ammonia stripping, conveying the discharged ammonia gas to an ammonia absorption device, and conveying the residual liquid to a sewage plant. And mixing the filtered precipitate into an organic fertilizer for recycling.
In summary, the following steps: according to the method for treating the ammonium nitrate industrial wastewater, a glucose solution is adopted to react with the ammonium nitrate industrial wastewater before an ammonia stripping process, hydroxyl groups in glucose and nitrate ions are subjected to substitution reaction under the illumination condition to generate white strip-shaped precipitates, and the white strip-shaped precipitates can be doped into an organic fertilizer, so that the content of organic matters and the content of nitrogen are increased, and the waste is utilized.
By controlling the dosage of glucose, nitrate ions can be effectively removed, the removal rate of the nitrate ions can reach more than 70%, harmful gas is not generated in the removal process, the precipitate waste is recycled, the cost is low, the nitrogen removal rate is high, and the method is green, environment-friendly and suitable for industrial continuous production.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The method for treating the ammonium nitrate industrial wastewater is characterized by comprising the following steps of:
mixing ammonium nitrate industrial wastewater and a glucose solution, reacting for a period of time, and filtering to obtain denitration wastewater;
and step two, carrying out ammonia stripping reaction on the denitration wastewater, and sending the wastewater into a sewage plant for treatment after ammonia stripping.
2. The method for treating ammonium nitrate industrial wastewater according to claim 1, wherein the content of nitrogen in nitrate ions in the ammonium nitrate industrial wastewater is 3 to 15g/L.
3. The method for treating ammonium nitrate industrial wastewater according to claim 1, wherein the molar ratio of nitrate ions to glucose in the ammonium nitrate industrial wastewater is (2.5-35): 1.
4. The method for treating ammonium nitrate industrial wastewater according to claim 1, wherein the molar ratio of nitrate ions to glucose in the ammonium nitrate industrial wastewater is 7.5.
5. The method for treating ammonium nitrate industrial wastewater according to claim 1, wherein in the first step, the reaction time is 35 to 55 hours.
6. The method for treating ammonium nitrate industrial wastewater according to claim 1, wherein in the first step, the reaction time is 48 hours.
7. The method for treating ammonium nitrate industrial wastewater according to claim 1, wherein in the first step, the reaction is carried out by photocatalysis under the irradiation of a light source, and the light source is natural light or fluorescent light.
8. The method for treating ammonium nitrate industrial wastewater according to claim 1 or 7, wherein in the first step, the catalyst ethanol is added into the ammonium nitrate industrial wastewater, and 6 to 10mL of ethanol is added into each liter of the ammonium nitrate industrial wastewater;
preferably, the catalyst KOH is added into the ammonium nitrate industrial wastewater, and 0.3 to 0.7g of KOH is added into each liter of ammonium nitrate industrial wastewater.
9. The method for treating ammonium nitrate industrial wastewater according to claim 1 or 7, wherein the catalysts ethanol and KOH are added to the ammonium nitrate industrial wastewater, and 8mL of ethanol and 0.5g of KOH are added per liter of the ammonium nitrate industrial wastewater.
10. The method for treating ammonium nitrate industrial wastewater according to claim 1, wherein the ammonia stripping reaction is specifically: adding alkali liquor into the denitration wastewater, and removing generated ammonia gas in an ammonia stripping tower; the mol ratio of the ammonium ions to the alkali liquor in the denitration wastewater is 1.05.
CN202210993855.3A 2022-08-18 2022-08-18 Method for treating ammonium nitrate industrial wastewater Pending CN115259500A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202643473U (en) * 2012-05-13 2013-01-02 钟祥凯龙楚兴化工有限责任公司 Efficient effluent treatment device for ammonium nitrate production line
CN104591435A (en) * 2015-01-04 2015-05-06 刘树芹 Treatment method for industrial wastewater
CN111559775A (en) * 2020-05-14 2020-08-21 东南大学 Method for photocatalytic degradation of nitrate nitrogen in water body by using glucose
CN216273564U (en) * 2021-09-06 2022-04-12 广州市迈源科技有限公司 Ammonium nitrate wastewater treatment system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202643473U (en) * 2012-05-13 2013-01-02 钟祥凯龙楚兴化工有限责任公司 Efficient effluent treatment device for ammonium nitrate production line
CN104591435A (en) * 2015-01-04 2015-05-06 刘树芹 Treatment method for industrial wastewater
CN111559775A (en) * 2020-05-14 2020-08-21 东南大学 Method for photocatalytic degradation of nitrate nitrogen in water body by using glucose
CN216273564U (en) * 2021-09-06 2022-04-12 广州市迈源科技有限公司 Ammonium nitrate wastewater treatment system

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