CN1493528A - Chemical precipitation method for treating ammonia nitrogen waste water - Google Patents
Chemical precipitation method for treating ammonia nitrogen waste water Download PDFInfo
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- CN1493528A CN1493528A CNA031528775A CN03152877A CN1493528A CN 1493528 A CN1493528 A CN 1493528A CN A031528775 A CNA031528775 A CN A031528775A CN 03152877 A CN03152877 A CN 03152877A CN 1493528 A CN1493528 A CN 1493528A
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- waste water
- ammonia nitrogen
- reactive tank
- nitrogen waste
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
A process for treating ammoniacal nitrogen sewage by chemical deposition method includes proportionally adding precipitant to said sewage, mixing, continuously delivering it in reactor, adding alkali solution to control pH=8.5-9.2, filtering and separating. Its advantages are continuous treating, and high effect on removing ammoniacal nitrogen by 95% or more.
Description
Technical field: the present invention has introduced a kind of method that adopts chemical precipitation method to handle ammonia nitrogen waste water, belongs to the chemical industry environmental protection technical field.
Background technology: have a large amount of ammonia nitrogen waste waters to discharge in the modern chemical industry production, the unprocessed direct discharging of these waste water will cause great harm to natural water.The main method of handling ammonia nitrogen waste water at present has biosynthesizing nitrofication process, ion exchange method, air and steam gas formulation etc., and these methods exist the waste water after processing costs height or the processing to be difficult to problems such as up to standard.
Chemical precipitation method is handled ammonia nitrogen waste water bibliographical information and patent, and the method that this patent adopts is different with method in the past.Chinese patent CN1223970A has introduced a kind of chemical precipitation method and has handled ammonia nitrogen waste water, and its treatment process comprises: waste water enters the homogeneous groove, stirs to reach homogeneous, and NH is surveyed in sampling
4 +-N ionic concn, then waste water is pumped into reactive tank, add precipitation agent and phosphoric acid, dissolved 5-30 minute, and added 4-8MNaOH solution and transfer pH to 6-8, add alkali lye after 0-30 minute again to pH=8-9, stirring 5-20 minute after-filtration separates, filtrate is water outlet, water outlet pH8-9, retention time of sewage 10-80 minute altogether.This method operation is comparatively complicated, and the pH value of solution is regulated and will be carried out in two steps, be difficult to realize operate continuously, and the wastewater treatment time is longer.
Technology contents: but the purpose of this invention is to provide method a kind of operate continuously, that treatment effect is good, ammonia nitrogen removal frank is handled ammonia nitrogen waste water in the chemical precipitation method more than 95%.
Ammonia nitrogen waste water treatment method of the present invention is: adopting the method for operate continuously, specifically is that ammonia nitrogen waste water is through sampling and measuring NH
4 +Enter a tempering tank after the-N ionic concn, in proportion (N: Mg: PO
4 3-=1: 1.0～1.1: 1.0～1.1) to wherein adding precipitation agent, precipitation agent is the deployed magnesium salts or the mixing solutions of magnesium oxide and phosphoric acid.The solution that will go out tempering tank continues to be conveyed into reactive tank, add a certain amount of flocculation agent in the reactive tank, in reactive tank, add simultaneously alkali lye, the pH value of solution is in 8.5～9.2 scopes in the control reactive tank, reaction soln is got rid of after filtering separation continuously through overflow port, obtain filter cake and filtrate, the filter cake main component is MgNH
4PO
46H
2O (MAP), filtrate is discharged after subsequent disposal.Waste water residence time in reactive tank is about 20 minutes.
Ammonia nitrogen waste water after treatment, ammonia nitrogen becomes precipitated crystal, its main component is MAP.This is precipitated as the cylinder shape xln, is the high-grade compound fertilizer of compound material of a kind of phosphorous, nitrogen, magnesium, calculates through theory to contain P
2O
529.0%, nitrogen is 5.7%, and containing Mg is 9.8%, can be used as the base fertilizer of dried ground crops such as corn, peanut, cotton.
The characteristics that adopt the present invention to handle ammonia nitrogen waste water are: flow process weak point, successive reaction, operation easily, react at normal temperatures and pressures, technology stability is good and be not subjected to other compound in the water such as the interference of organic compound and cyanogen.In addition, but adopt also a kind of high-efficiency compound fertilizer MAP of by-product of the present invention, reduced cost for wastewater treatment.
Embodiment:
Example 1:
Ammonia nitrogen waste water in this example derives from the two friendship liquid that the cracking catalyst production process produces, and its main component is: F
-: 121ppm, Cl
-: 96ppm, Br
-: 21ppm, NH
4 +-N:5433mg/L, SO
4 2-: 2.19%, turbidity 5.814mg/L.
Treating processes is: measure this ammonia nitrogen waste water of 1000mL, to wherein adding 86.6gMgCl
26H
2O and 29.44mlH
3PO
4(85%), continue to splash in the reactor that has mother liquor after the mixing, in reactor, add small amount of flocculant, simultaneously make that to wherein adding 5MNaOH the pH value of solution is controlled in 8.5～9.2 scopes in the reactor, reaction soln is discharged after filtering separation continuously through overflow port, obtain filter cake and filtrate, the filter cake main component is MAP, and filtrate is water outlet.About 20 minutes of waste water residence time in reactor.Calculate after measured and can get clearance more than 95%.Test-results is as follows:
| Water inlet NH 4 +-N concentration mg/L | PH value | Water outlet NH 4 +-N concentration mg/L | Clearance % |
| ????5433 | ????8.88 | ????35 | ????98.8 |
| ????5433 | ????8.91 | ????27 | ????98.9 |
| ????5433 | ????9.18 | ????75 | ????97.2 |
Example 2:
The concentration of taking the preparation of sulphur ammonium is the ammonia nitrogen waste water 1000mL of 5180mg/L, to wherein adding 82.62gMgCl
26H
2O and 28.08mlH
3PO
4(85%), continue to splash in the reactor that has mother liquor after the mixing, add small amount of flocculant in the reactor, simultaneously make that to wherein adding 5MNaOH the pH value of solution is controlled in 8.5～9.2 scopes in the reactor, reaction soln is discharged after filtering separation continuously through overflow port, obtain filter cake and filtrate, the filter cake main component is MAP, and filtrate is water outlet.About 20 minutes of waste water residence time in reactor.Calculate after measured and can get clearance more than 95%.Test-results is as follows:
| Water inlet NH 4 +-N concentration mg/L | PH value | Water outlet NH 4 +-N concentration mg/L | Clearance % |
| ????5180 | ????8.84 | ????29 | ????98.9 |
| ????5180 | ????8.92 | ????24 | ????99.0 |
| ????5180 | ????9.15 | ????65 | ????98.1 |
Claims (3)
1, a kind of chemical precipitation method is handled the ammonia nitrogen waste water method, it is characterized in that adopting the method for operate continuously, specifically is that ammonia nitrogen waste water is through sampling and measuring NH
4 +Enter a tempering tank after the-N ionic concn, according to NH
4 +-N ionic concn is in proportion to wherein adding precipitation agent, precipitation agent is the mixture of magnesium salts or magnesium oxide and phosphoric acid, be conveyed into reactive tank after the mixing continuously, in reactive tank, add simultaneously alkali lye, the pH value of solution in the groove is maintained in 8.5～9.2 scopes, reaction soln is discharged after filtering separation obtains filter cake and filtrate continuously through overflow port, and the main component of filter cake is MgNH
4PO
46H
2O (MAP), filtrate is discharged after subsequent disposal, and ammonia nitrogen removal frank reaches more than 95%, about 20 minutes of waste water residence time in reactive tank.
2, method according to claim 1 is characterized in that the precipitation agent that adds excessive about 5%.
3, method according to claim 1 is characterized in that waste water successive reaction in reactive tank, is a kind of method of Continuous Wastewater Treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031528775A CN100384754C (en) | 2003-08-29 | 2003-08-29 | Chemical precipitation method for treating ammonia nitrogen waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031528775A CN100384754C (en) | 2003-08-29 | 2003-08-29 | Chemical precipitation method for treating ammonia nitrogen waste water |
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| Publication Number | Publication Date |
|---|---|
| CN1493528A true CN1493528A (en) | 2004-05-05 |
| CN100384754C CN100384754C (en) | 2008-04-30 |
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ID=34240704
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|---|---|---|---|
| CNB031528775A Expired - Fee Related CN100384754C (en) | 2003-08-29 | 2003-08-29 | Chemical precipitation method for treating ammonia nitrogen waste water |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100336741C (en) * | 2005-09-29 | 2007-09-12 | 哈尔滨工业大学 | Ammonia Nitrogen eliminating chemical precipitator for treating high concentration ammonia nitrogen effluent |
| CN100343184C (en) * | 2005-12-09 | 2007-10-17 | 汪承保 | High-efficient fast ammonia nitragen rmoving agent |
| CN100425544C (en) * | 2006-06-21 | 2008-10-15 | 哈尔滨工业大学 | Pretreatment method for wastewater of ammonia nitrogen in high density |
| CN101875526B (en) * | 2010-05-13 | 2011-09-07 | 宜兴蓝星化工环保研究院有限公司 | Method for treating coking waste water after ammonia removal |
| CN101391799B (en) * | 2007-09-20 | 2011-09-14 | 深圳市东江环保股份有限公司 | Method for recovery processing of ammonia nitrogen from printed circuit board waste liquid |
| CN102576889A (en) * | 2009-09-02 | 2012-07-11 | Dhv有限公司 | Method for the production of electrical energy from ammonium |
| CN102774986A (en) * | 2012-07-18 | 2012-11-14 | 常州大学 | Method for treating high-concentration ammonia-nitrogen in circuit board etching wastewater |
| CN102774985A (en) * | 2012-07-18 | 2012-11-14 | 常州大学 | Method for treating high-concentration ammonia-nitrogen in coal chemical wastewater |
| CN102951765A (en) * | 2011-08-31 | 2013-03-06 | 天津滨海鼎昇环保科技工程有限公司 | Process for treating landfill penetrating fluid by chemical precipitation and biological denitrification |
| CN103819053A (en) * | 2014-02-25 | 2014-05-28 | 农业部沼气科学研究所 | Biogas slurry and biogas purifying method by struvite precipitation coupled with microalgae cultivation |
| CN103848540A (en) * | 2014-01-10 | 2014-06-11 | 洛阳智方环保技术有限公司 | Technique for processing ammonia-nitrogen wastewater employing struvite formation |
| CN109721209A (en) * | 2018-11-05 | 2019-05-07 | 杭州司迈特水处理工程有限公司 | A kind of wastewater treatment method based on MAP and biochemical method combination removal ammonia nitrogen |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2669619B1 (en) * | 1990-11-26 | 1993-01-08 | Elf Aquitaine | PROCESS FOR THE DISPOSAL OF AMMONIA FROM WASTEWATER. |
| CN1076322C (en) * | 1998-01-22 | 2001-12-19 | 中国石油化工集团公司 | Method for treatment of waste water of ammonium sulfate |
-
2003
- 2003-08-29 CN CNB031528775A patent/CN100384754C/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100336741C (en) * | 2005-09-29 | 2007-09-12 | 哈尔滨工业大学 | Ammonia Nitrogen eliminating chemical precipitator for treating high concentration ammonia nitrogen effluent |
| CN100343184C (en) * | 2005-12-09 | 2007-10-17 | 汪承保 | High-efficient fast ammonia nitragen rmoving agent |
| CN100425544C (en) * | 2006-06-21 | 2008-10-15 | 哈尔滨工业大学 | Pretreatment method for wastewater of ammonia nitrogen in high density |
| CN101391799B (en) * | 2007-09-20 | 2011-09-14 | 深圳市东江环保股份有限公司 | Method for recovery processing of ammonia nitrogen from printed circuit board waste liquid |
| CN102576889A (en) * | 2009-09-02 | 2012-07-11 | Dhv有限公司 | Method for the production of electrical energy from ammonium |
| CN101875526B (en) * | 2010-05-13 | 2011-09-07 | 宜兴蓝星化工环保研究院有限公司 | Method for treating coking waste water after ammonia removal |
| CN102951765A (en) * | 2011-08-31 | 2013-03-06 | 天津滨海鼎昇环保科技工程有限公司 | Process for treating landfill penetrating fluid by chemical precipitation and biological denitrification |
| CN102774986A (en) * | 2012-07-18 | 2012-11-14 | 常州大学 | Method for treating high-concentration ammonia-nitrogen in circuit board etching wastewater |
| CN102774985A (en) * | 2012-07-18 | 2012-11-14 | 常州大学 | Method for treating high-concentration ammonia-nitrogen in coal chemical wastewater |
| CN103848540A (en) * | 2014-01-10 | 2014-06-11 | 洛阳智方环保技术有限公司 | Technique for processing ammonia-nitrogen wastewater employing struvite formation |
| CN103819053A (en) * | 2014-02-25 | 2014-05-28 | 农业部沼气科学研究所 | Biogas slurry and biogas purifying method by struvite precipitation coupled with microalgae cultivation |
| CN103819053B (en) * | 2014-02-25 | 2015-08-05 | 农业部沼气科学研究所 | Struvite precipitation coupling microdisk electrode is utilized to carry out the method for natural pond liquid and marsh gas purifying |
| CN109721209A (en) * | 2018-11-05 | 2019-05-07 | 杭州司迈特水处理工程有限公司 | A kind of wastewater treatment method based on MAP and biochemical method combination removal ammonia nitrogen |
Also Published As
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|---|---|
| CN100384754C (en) | 2008-04-30 |
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