CN101428916A - Ammonia nitrogen wastewater treating method - Google Patents
Ammonia nitrogen wastewater treating method Download PDFInfo
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- CN101428916A CN101428916A CNA2008102369547A CN200810236954A CN101428916A CN 101428916 A CN101428916 A CN 101428916A CN A2008102369547 A CNA2008102369547 A CN A2008102369547A CN 200810236954 A CN200810236954 A CN 200810236954A CN 101428916 A CN101428916 A CN 101428916A
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- vacuum
- waste water
- ammonia
- negative pressure
- jar
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Abstract
The invention relates to a method for treating ammonia-nitrogen wastewater. The method for treating the ammonia-nitrogen wastewater is characterized by comprising the following steps: 1) the pH value of the ammonia-nitrogen wastewater is adjusted to between 9 and 13 by an alkaline substance, and an alkaline wastewater solution is obtained; and 2) the alkaline wastewater solution is pumped into a vacuum deamination tank and dispersed into a liquid membrane or atomized into vaporous droplets, so that the inside of the vacuum deamination tank forms vacuum negative pressure which drives NH4<+> in the liquid membrane or the vaporous droplets to be continuously converted into NH3, and the NH3 is escaped, enters a gas phase and is pumped out of the tank by the vacuum negative pressure. The method has the characteristic of good treatment effect.
Description
Technical field
The present invention relates to a kind of method for treating ammonia-nitrogen wastewater.
Background technology
At present, water globe pollutes and increasingly sharpens, and the body eutrophication phenomenon is more and more fiery.And the major reason that causes body eutrophication is to contain NH in the sanitary wastewater, trade effluent of discharging
3-N.Contain ammonia nitrogen (NH
3-N) waste water is called ammonia nitrogen waste water.
Method for treating ammonia-nitrogen wastewater is a lot, and relative merits are separately all arranged, but total treatment effect is not very desirable.As number of patent application: 200610019379.6, disclose a kind of wastewater by vacuum negative pressure-pumping removal methods and this method of equipment and be and utilized negative pressure of vacuum suction mode to remove NH in the waste water
3-N, and with this NH
3Reuptake to supplying the pure ammoniacal liquor of recycling; This method does not adopt the pH value of regulating ammonia nitrogen waste water, does not adopt ammonia nitrogen waste water is dispersed into liquid film or vaporific liquid grain yet, and therefore, treatment effect is not very desirable.How further to improve the treatment effect of ammonia nitrogen waste water, be a unsolved difficult problem always.
Summary of the invention
The object of the present invention is to provide the good method for treating ammonia-nitrogen wastewater of a kind of treatment effect.
To achieve these goals, technical scheme of the present invention is: method for treating ammonia-nitrogen wastewater is characterized in that it comprises the steps:
1) the pH value with alkaline matter adjusting ammonia nitrogen waste water is 9-13, obtains alkaline waste water solution (with the NH that produces
3Take away, or directly in atmosphere, finish);
2) pump into alkaline waste water solution to the vacuum deamination jar, and be dispersed into liquid film or be atomized into vaporific liquid grain;
3) make formation negative pressure of vacuum in the vacuum deamination jar, force the NH in liquid film or the vaporific liquid grain
4 +Constantly be converted into NH
3Effusion enters gas phase and is extracted out outside the jar by negative pressure of vacuum.
Described alkaline matter is NaOH, KOH or Ca (OH)
2
The principle of foundation of the present invention is as follows:
Vacuum take-off denitrogenation principle is containing NH
3In the waste water of-N, NH
3There is following balance in-N:
Therefore when 1) the pH value of ammonia nitrogen waste water being adjusted to alkalescence, make balanced reaction to generation NH
3Direction carry out;
2) the alkaline waste water solution that will regulate after the pH value by liquid distributor or nozzle (or aerosolization or ultrasonic atomizatio or revolve film disperse) is dispersed into liquid film or vaporific liquid grain, and owing to total surface area increases considerably, ammonia is able to escape in gas phase fast in liquid film or the droplet;
3) when when containing liquid film in the encloses container jar or vaporific liquid grain and apply negative pressure of vacuum, with NH in liquid film or the vaporific liquid grain
3Dividing potential drop reduces, thereby makes NH
3The balanced reaction of-N is to generating NH
3Direction carry out, so NH in the vaporific liquid grain
4 +Constantly be converted into NH
3The effusion liquid phase enters gas phase, and is constantly extracted out outside the jar by negative pressure of vacuum.
The invention has the beneficial effects as follows: the present invention at first adopts alkaline matter to regulate the pH value of ammonia nitrogen waste water, removes part NH in the ammonia nitrogen waste water
4 +Form liquid film then or be atomized into vaporific liquid grain, because total surface area increases considerably, ammonia is able to escape in gas phase fast in liquid film or the droplet; When liquid film or vaporific liquid grain are applied negative pressure of vacuum, thereby make NH
3The balanced reaction of-N is to generating NH
3Direction carry out fast, so NH in the water
4 +Constantly be converted into NH
3The effusion liquid phase enters gas phase fast, and is constantly extracted out outside the jar by negative pressure of vacuum; Wastewater treatment become liquid film or be atomized into vaporific liquid grain and liquid film or vaporific liquid grain are applied negative pressure of vacuum combine, make obvious processing effect.The present invention adopts and regulates pH value, liquid film (or atomizing), negative pressure of vacuum three and combine, and denitrification percent is up to more than 95%, obvious processing effect.
Solution after the processing can reach country's discharging and reuse standard.Present method is applicable to that high, medium and low concentration contains the processing of ammonia nitrogen solution.
Embodiment
For a better understanding of the present invention, further illustrate content of the present invention, but content of the present invention not only is confined to the following examples below in conjunction with embodiment.
Embodiment 1:
Method for treating ammonia-nitrogen wastewater, it comprises the steps:
1) the pH value with alkaline matter adjusting ammonia nitrogen waste water is 9, obtains alkaline waste water solution (with the NH that produces
3Take away); Described alkaline matter is NaOH;
2) pump into alkaline waste water solution to the vacuum deamination jar, and be atomized into vaporific liquid grain (basic solution being dispersed into vaporific liquid grain), make to become negative pressure of vacuum (pressure is 0.01MPa) in the vacuum deamination jar, force the NH in the vaporific liquid grain by liquid distributor
4 +Constantly be converted into NH
3Effusion enters gas phase and is extracted out outside the jar by negative pressure of vacuum.
To the former water (ammonia nitrogen waste water) of present embodiment 1, and water carries out NH respectively after extracting jar outer denitrogenation out
3The concentration of-N detects, and calculates denitrification percent, the results are shown in Table 1.
Denitrification percent=[(former water NH
3Water NH after-N concentration-denitrogenation
3-N concentration)/former water NH
3-N concentration] * 100%.
Remove NH
3Reclaim principle: extract negative pressure of vacuum out NH
3Gas is taken advantage of a situation and is fed in the cleaning water, because water is to NH
3Absorption and build following balance again:
Embodiment 2:
Method for treating ammonia-nitrogen wastewater, it comprises the steps:
1) the pH value with alkaline matter adjusting ammonia nitrogen waste water is 11, obtains alkaline waste water solution (with the NH that produces
3Take away); Described alkaline matter is Ca (OH)
2
2) pump into alkaline waste water solution to the vacuum deamination jar, and alkaline waste water solution is dispersed into liquid film, make to become negative pressure of vacuum (pressure is 0.03MPa) in the vacuum deamination jar, force the NH in the liquid film by rotation membrane pipe
4 +Constantly be converted into NH
3Effusion enters gas phase and is extracted out outside the jar by negative pressure of vacuum.
The former water (ammonia nitrogen waste water) of present embodiment 2 and the water after the extraction jar outer denitrogenation are carried out NH respectively
3The concentration of-N detects, and calculates denitrification percent, the results are shown in Table 1.
Embodiment 3:
Method for treating ammonia-nitrogen wastewater, it comprises the steps:
1) the pH value with alkaline matter adjusting ammonia nitrogen waste water is 9-13, obtains alkaline waste water solution (with the NH that produces
3Take away, or directly in atmosphere, finish); Described alkaline matter is KOH;
2) pump into alkaline waste water solution to the vacuum deamination jar, and be atomized into vaporific liquid grain (basic solution being dispersed into vaporific liquid grain), make to become negative pressure of vacuum (pressure is 0.05MPa) in the vacuum deamination jar, force the NH in the vaporific liquid grain by ultrasonic atomizatio
4 +Constantly be converted into NH
3Effusion enters gas phase and is extracted out outside the jar by negative pressure of vacuum.
The former water (ammonia nitrogen waste water) of present embodiment 3 and the water after the extraction jar outer denitrogenation are carried out NH respectively
3The concentration of-N detects, and calculates denitrification percent, the results are shown in Table 1.
Table 1
Claims (2)
1. method for treating ammonia-nitrogen wastewater is characterized in that it comprises the steps:
1) the pH value with alkaline matter adjusting ammonia nitrogen waste water is 9-13, obtains alkaline waste water solution;
2) pump into alkaline waste water solution to the vacuum deamination jar, and be dispersed into liquid film or be atomized into vaporific liquid grain;
3) make formation negative pressure of vacuum in the vacuum deamination jar, force the NH in liquid film or the vaporific liquid grain
4 +Constantly be converted into NH
3Effusion enters gas phase and is extracted out outside the jar by negative pressure of vacuum.
2. method for treating ammonia-nitrogen wastewater according to claim 1 is characterized in that: described alkaline matter is NaOH, KOH or Ca (OH)
2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102369547A CN101428916A (en) | 2008-12-23 | 2008-12-23 | Ammonia nitrogen wastewater treating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102369547A CN101428916A (en) | 2008-12-23 | 2008-12-23 | Ammonia nitrogen wastewater treating method |
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|---|---|
| CN101428916A true CN101428916A (en) | 2009-05-13 |
Family
ID=40644593
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|---|---|---|---|
| CNA2008102369547A Pending CN101428916A (en) | 2008-12-23 | 2008-12-23 | Ammonia nitrogen wastewater treating method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102471095A (en) * | 2009-07-29 | 2012-05-23 | 中心地带科技股份有限公司 | Compact wastewater concentrator and pollutant scrubber |
| CN102476884A (en) * | 2010-11-19 | 2012-05-30 | 攀钢集团钢铁钒钛股份有限公司 | Treatment method of ammonia nitrogen wastewater |
| CN103183393A (en) * | 2013-04-03 | 2013-07-03 | 江苏夏航环境工程有限公司 | Process for treating ammonia nitrogen wastewater by utilizing vacuum degassing membrane technology |
| CN110981099A (en) * | 2019-12-18 | 2020-04-10 | 江南大学 | Method for producing ethanol by recycling biogas slurry and vinasse clear liquid and reusing |
-
2008
- 2008-12-23 CN CNA2008102369547A patent/CN101428916A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102471095A (en) * | 2009-07-29 | 2012-05-23 | 中心地带科技股份有限公司 | Compact wastewater concentrator and pollutant scrubber |
| CN105126366A (en) * | 2009-07-29 | 2015-12-09 | 中心地带科技股份有限公司 | Compact wastewater concentrator and pollutant scrubber |
| CN102476884A (en) * | 2010-11-19 | 2012-05-30 | 攀钢集团钢铁钒钛股份有限公司 | Treatment method of ammonia nitrogen wastewater |
| CN103183393A (en) * | 2013-04-03 | 2013-07-03 | 江苏夏航环境工程有限公司 | Process for treating ammonia nitrogen wastewater by utilizing vacuum degassing membrane technology |
| CN110981099A (en) * | 2019-12-18 | 2020-04-10 | 江南大学 | Method for producing ethanol by recycling biogas slurry and vinasse clear liquid and reusing |
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| DD01 | Delivery of document by public notice |
Addressee: Yang Gaoli Document name: Notification that Application Deemed to be Withdrawn |
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Open date: 20090513 |