CN100425544C - Pretreatment method for wastewater of ammonia nitrogen in high density - Google Patents
Pretreatment method for wastewater of ammonia nitrogen in high density Download PDFInfo
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- CN100425544C CN100425544C CNB2006100101949A CN200610010194A CN100425544C CN 100425544 C CN100425544 C CN 100425544C CN B2006100101949 A CNB2006100101949 A CN B2006100101949A CN 200610010194 A CN200610010194 A CN 200610010194A CN 100425544 C CN100425544 C CN 100425544C
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- ammonia nitrogen
- phosphate
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Abstract
The present invention relates to a method for the pretreatment of ammonia nitrogen waste water with high concentration, which belongs to the field of waste water treatment. In order to solve the defect that if the prior art for treating ammonia nitrogen waste water is adopted, treated ammonia nitrogen can not be recovered for reuse, the method of the present invention comprises the steps that ammonia nitrogen waste water enters a reaction tank, composite phosphate is added into the reaction tank, and the composite phosphate is formed by that a mixture of two kinds or more than two kinds of phosphate, dihydric phosphate, hydrogen phosphate and phosphonic acid is combined with magnesium salt, wherein the reaction time is from 10 to 60 min, the pH value is from 8.0 to 9.5, and then, gravity settling is kept for 10 to 20 min. Supernatant liquid is discharged from the system, and the waste water purification is completed. Compared with the prior art, the method for utilizing composite phosphate to remove high concentration ammonia nitrogen is better, and the higher the concentration of intake water is, the better the effect of the method is. In addition, the pH value does not need to be adjusted singly during the process, and ammonium magnesium phosphate which is a reaction product can be used as fertilizer sources. Foundation is laid for practical application, and the purpose of recovering resources for reuse can be achieved.
Description
Technical field
The invention belongs to sewage treatment area, relate to a kind of pretreatment method for wastewater of ammonia nitrogen.
Background technology
Along with the aggravation of body eutrophication, people especially pay close attention to the removal problem of ammonia nitrogen in the waste water.Existing ammonia nitrogenous wastewater treatment technology mainly contains: biological process, blow-off method, chemical precipitation method etc., but weak point is all arranged.Biological process is handled nitrogen-containing wastewater and be it is believed that it is effective, the most most economical method, but it is then powerless to containing high-concentration ammonia nitrogenous wastewater; Blow-off method is suitable for handling high-concentration ammonia nitrogenous wastewater, but its bigger reactor, higher effluent flow rate and higher energy consumption have limited its application in practice, the most important thing is that this method brings secondary pollution; Though the traditional chemical precipitator method can efficiently be removed the ammonia nitrogen in the waste water, this process need independent control pH value, its process complexity, loaded down with trivial details has hindered the application in practice of this method.The common deficiency of existing ammonia nitrogen waste water treatment process is that the ammonia nitrogen after the processing can not recycling.
Summary of the invention
There is the deficiency that ammonia nitrogen after handling can not recycling at existing ammonia nitrogen waste water treatment process, the invention provides a kind of pretreatment method for wastewater of ammonia nitrogen in high density, described method is: ammonia nitrogen waste water enters in the reaction tank, by in reaction tank, adding composite phosphate, described composite phosphate is by phosphoric acid salt, dihydrogen phosphate, the mixture and the magnesium salts of two or more in hydrophosphate and the phosphoric acid are composited, the mol ratio of each composition is a magnesium salts in the control reaction system: phosphoric acid salt, dihydrogen phosphate, hydrophosphate, the mixture of two or more in the phosphoric acid: ammonia nitrogen=0.1～10: 0.1～10: 1.0, wherein the reaction times is 10～60min, the pH value is 8.0～9.5, gravity settling 10～20min subsequently, supernatant liquor is discharged system, finishes sewage purification.
Composite phosphate among the present invention is both as reactant, again as the medicament of regulation system pH value.Reaction product is that magnesium ammonium phosphate is commonly called as struvite, can be used as composite fertilizer and uses.
Principle of the present invention is, adds composite phosphate in nitrogen-containing wastewater, makes ammonia nitrogen be transformed into precipitation, and reaches the purpose of removal.Reaction equation is as follows:
Mg
2++NH
4 ++HPO
4 2-+6H
2O←→MgNH
4PO
4·6H
2O+H
+。
By add composite phosphate in high-concentration ammonia nitrogenous wastewater, the ammonia nitrogen in the water outlet can effectively be removed by conventional sewage treatment process.The ammonia nitrogen in high density that this method is removed in the waste water is removed the efficient height; Speed of response is fast; Removal effect is not subjected to the restriction of influent ammonium concentration; The most important thing is that this method exempted the loaded down with trivial details step that chemical precipitation method needs independent control pH value; Can take into account simultaneously the phosphate concn in dewatering; The magnesium ammonium phosphate that generates can be used as fertilizer, accomplishes resource reutilization.
Compared with prior art, composite phosphate of the present invention is removed ammonia nitrogen in high density and is had certain advantage, influent concentration is high more, advantage is obvious more, in addition, this process is without independent control pH value, and the reaction product magnesium ammonium phosphate can be used as fertilizer, for practical application is laid a good foundation, can reach the purpose of resource recycling.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
Embodiment one: the treating processes of present embodiment is finished in a contact reactor, concrete technical process is: ammonia nitrogen waste water enters in the reaction tank, by in reaction tank, adding composite phosphate, described composite phosphate is by phosphoric acid salt, dihydrogen phosphate, hydrophosphate, the mixture and the magnesium salts of two or more in the phosphoric acid are composited, the mol ratio of each composition is a magnesium salts in the control reaction system: phosphoric acid salt, dihydrogen phosphate, hydrophosphate, the mixture of two or more in the phosphoric acid: ammonia nitrogen=0.1～10: 0.1～10: 1.0, wherein the reaction times is 10～60min, the pH value is 8.0～9.5, gravity settling 10～20min subsequently, supernatant liquor is discharged system, finishes sewage purification.Technical process as shown in Figure 1.
In the present embodiment, described magnesium salts is magnesium chloride, magnesium oxide or sal epsom.In the present embodiment, described phosphoric acid salt is potassiumphosphate or sodium phosphate.
In the present embodiment, described dihydrogen phosphate is potassium primary phosphate or SODIUM PHOSPHATE, MONOBASIC.
In the present embodiment, described hydrophosphate is potassium hydrogen phosphate or sodium hydrogen phosphate.
In the present embodiment, when adding two kinds and above medicament, it is different different because of processing sewage pH that it adds ratio.
In the present embodiment, the form of adding of described composite phosphate is solution form or solid form.
In the present embodiment, adding composite phosphate needed continuously stirring 30 minutes.
In the present embodiment, the product magnesium ammonium phosphate is a white precipitate, and its material is formed can be different because of the difference of composite phosphate, and it can be used as compound manure.
In the present embodiment, adopt composite phosphate to remove ammonia nitrogen in high density in the sewage, the high more effect of influent ammonium concentration is remarkable more, to low-concentration ammonia-nitrogen (being lower than 100mg/L) weak effect, so in the control ammonia nitrogen waste water concentration of ammonia nitrogen greater than 100mg/L.
In the present embodiment, described method can be used separately, also can be used in combination with other technology, and every improvement of carrying out on the method for the invention basis all belongs to protection scope of the present invention.
Embodiment two: at influent ammonium concentration is that 200mg/L, initial pH add composite phosphate in 7.46 the waste water, makes magnesium: composite phosphate (HPO
4 2-And PO
4 3-Mol ratio is 1: 3): nitrogen=1.4: 0.9: 1.0 (mol ratio), system does not have independent control pH, and the water outlet ammonia nitrogen concentration drops to below the 39.14mg/L, and clearance is more than 80.42%, and reaction back system pH is 9.23.
Embodiment three: at influent ammonium concentration is that 200mg/L, initial pH add composite phosphate to make magnesium in 7.42 the waste water: composite phosphate (HPO
4 2-And PO
4 3-Mol ratio is 2: 1): nitrogen=1.4: 0.9: 1.0 (mol ratio), system does not have independent control pH, and the water outlet ammonia nitrogen concentration drops to below the 20.93mg/L, and clearance is 89.54%, and reaction back system pH is 9.42.
Embodiment four: at influent ammonium concentration is that 200mg/L, initial pH add composite phosphate in 7.40 the waste water, makes magnesium: mixed phosphate (HPO
4 2-And PO
4 3-Mol ratio is 1: 4): nitrogen=1.4: 0.9: 1.0 (mol ratio), system does not have independent control pH, and the water outlet ammonia nitrogen concentration drops to below the 44.13mg/L, and clearance is 77.94%, and reaction back system pH is 9.83.
Embodiment five: at influent ammonium concentration is that 200mg/L, initial pH add composite phosphate in 7.96 the waste water, makes magnesium: mixed phosphate (H
2PO
4 -And HPO
4 2-Mol ratio is 1: 3): nitrogen=1.4: 0.9: 1.0 (mol ratio), system does not have independent control pH, and the water outlet ammonia nitrogen concentration drops to below the 54.13mg/L, and clearance is 72.94%, and reaction back system pH is 9.43.
Embodiment six: at influent ammonium concentration is that 200mg/L, initial pH add composite phosphate in 8.56 the waste water, makes magnesium: mixed phosphate (H
2PO
4 2-, HPO
4 2-And PO
4 3-Mol ratio is 1: 1: 1): nitrogen=1.4: 0.9: 1.0 (mol ratio), system does not have independent control pH, and the water outlet ammonia nitrogen concentration drops to below the 58.26mg/L, and clearance is 75.63%, and reaction back system pH is 9.83.
Claims (8)
1, a kind of pretreatment method for wastewater of ammonia nitrogen in high density, it is characterized in that described method is: ammonia nitrogen waste water enters in the reaction tank, by in reaction tank, adding composite phosphate, described composite phosphate is by phosphoric acid salt, dihydrogen phosphate, hydrophosphate, the mixture and the magnesium salts of two or more in the phosphoric acid are composited, the mol ratio of each composition is a magnesium salts in the control reaction system: phosphoric acid salt, dihydrogen phosphate, hydrophosphate, the mixture of two or more in the phosphoric acid: ammonia nitrogen=0.1～10: 0.1～10: 1.0, wherein the reaction times is 10～60min, the pH value is 8.0～9.5, gravity settling 10～20min subsequently, supernatant liquor is discharged system, finishes sewage purification.
2, a kind of pretreatment method for wastewater of ammonia nitrogen in high density according to claim 1 is characterized in that described magnesium salts is magnesium chloride, magnesium oxide or sal epsom.
3, a kind of pretreatment method for wastewater of ammonia nitrogen in high density according to claim 1 is characterized in that described phosphoric acid salt is potassiumphosphate or sodium phosphate.
4, a kind of pretreatment method for wastewater of ammonia nitrogen in high density according to claim 1 is characterized in that described dihydrogen phosphate is potassium primary phosphate or SODIUM PHOSPHATE, MONOBASIC.
5, a kind of pretreatment method for wastewater of ammonia nitrogen in high density according to claim 1 is characterized in that described hydrophosphate is potassium hydrogen phosphate or sodium hydrogen phosphate.
6, a kind of pretreatment method for wastewater of ammonia nitrogen in high density according to claim 1, the concentration that it is characterized in that ammonia nitrogen in the described ammonia nitrogen waste water is greater than 100mg/L.
7, a kind of pretreatment method for wastewater of ammonia nitrogen in high density according to claim 1, the form of adding that it is characterized in that described composite phosphate is solution form or solid form.
8, a kind of pretreatment method for wastewater of ammonia nitrogen in high density according to claim 1 is characterized in that adding composite phosphate and needed continuously stirring 30 minutes.
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| CN100425544C true CN100425544C (en) | 2008-10-15 |
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| 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 |
| CN102689935B (en) * | 2012-05-14 | 2016-01-20 | 贵州师范大学 | A kind for the treatment of process of acid wastewater in mine |
| 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 |
| CN105439665A (en) * | 2015-11-09 | 2016-03-30 | 贵州开磷集团股份有限公司 | Plant nutrient solution taking ammonia-nitrogen wastewater as raw material and preparation method for plant nutrient solution |
| CN105731710B (en) * | 2016-03-08 | 2019-04-30 | 赣州逸豪优美科实业有限公司 | A kind of high magnesium ammonium sulfate waste water comprehensive reutilization method of cobalt smelting |
| CN106517656A (en) * | 2016-11-16 | 2017-03-22 | 环境保护部南京环境科学研究所 | Collaborative treatment device and method for phosphatizing wastewater and ammonia-nitrogen wastewater |
| CN108862827A (en) * | 2018-06-21 | 2018-11-23 | 湖南双晟科技信息咨询有限公司 | A kind of processing method of ammonia nitrogen waste water |
| CN108892543A (en) * | 2018-06-29 | 2018-11-27 | 广西博测检测技术服务有限公司 | A method of ammonium magnesium phosphate fertilizer is produced while processing nitrogen phosphorus waste water |
| CN109368848A (en) * | 2018-11-01 | 2019-02-22 | 深圳永清水务有限责任公司 | A kind of preprocess method of scale animal and poultry cultivation waste water |
| CN109354248A (en) * | 2018-11-12 | 2019-02-19 | 湘潭大学 | A kind of processing method of wet desulphurization waste water |
| CN110498537A (en) * | 2019-09-03 | 2019-11-26 | 瓮福（集团）有限责任公司 | A kind of technique that the phosphorus fluorine sewage containing ammonia nitrogen efficiently removes ammonia nitrogen |
| CN114524498A (en) * | 2022-01-06 | 2022-05-24 | 山东三加环保新材料有限公司 | Preparation method and application of efficient nitrogen removal agent for rural domestic sewage treatment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0363612A1 (en) * | 1988-10-11 | 1990-04-18 | Passavant-Werke Ag | Process for removal of waste waters with a high concentration of ammoniacal nitrogen |
| JPH09220593A (en) * | 1996-02-16 | 1997-08-26 | Kurita Water Ind Ltd | Treatment of ammonia nitrogen-containing organic waste liquid |
| CN1220972A (en) * | 1998-09-30 | 1999-06-30 | 中国石化兰州化学工业公司 | Treatment method for waste water |
| CN1223970A (en) * | 1998-01-22 | 1999-07-28 | 中国石油化工总公司 | Method for treatment of waste water of ammonium sulfate |
| CN1493528A (en) * | 2003-08-29 | 2004-05-05 | 南化集团研究院 | Chemical precipitation method for treating ammonia nitrogen waste water |
| CN1623924A (en) * | 2003-12-04 | 2005-06-08 | 中国科学院生态环境研究中心 | Process for removing ammonia of treating waste water containing high contentrition ammonia |
-
2006
- 2006-06-21 CN CNB2006100101949A patent/CN100425544C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0363612A1 (en) * | 1988-10-11 | 1990-04-18 | Passavant-Werke Ag | Process for removal of waste waters with a high concentration of ammoniacal nitrogen |
| JPH09220593A (en) * | 1996-02-16 | 1997-08-26 | Kurita Water Ind Ltd | Treatment of ammonia nitrogen-containing organic waste liquid |
| CN1223970A (en) * | 1998-01-22 | 1999-07-28 | 中国石油化工总公司 | Method for treatment of waste water of ammonium sulfate |
| CN1220972A (en) * | 1998-09-30 | 1999-06-30 | 中国石化兰州化学工业公司 | Treatment method for waste water |
| CN1493528A (en) * | 2003-08-29 | 2004-05-05 | 南化集团研究院 | Chemical precipitation method for treating ammonia nitrogen waste water |
| CN1623924A (en) * | 2003-12-04 | 2005-06-08 | 中国科学院生态环境研究中心 | Process for removing ammonia of treating waste water containing high contentrition ammonia |
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