CN105060543A - Ammonia nitrogen recovery method for biogas slurry in farm - Google Patents
Ammonia nitrogen recovery method for biogas slurry in farm Download PDFInfo
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- CN105060543A CN105060543A CN201510421850.3A CN201510421850A CN105060543A CN 105060543 A CN105060543 A CN 105060543A CN 201510421850 A CN201510421850 A CN 201510421850A CN 105060543 A CN105060543 A CN 105060543A
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Abstract
The invention relates to an ammonia nitrogen recovery method for biogas slurry in a farm and belongs to the field of wastewater treatment. The ammonia nitrogen recovery method comprises the following steps: adding lime powder into a biogas liquid sample to enable ammonium nitrogen to become free ammonia nitrogen ions; adding magnesium ammonium phosphate and magnesium chloride into the filtrate; slowly stirring and heating to 70-90 DEG C for reflow; adding an aluminium sulfate hexadecahydrate solution into the mixed liquor; continually heating to 110-130 DEG C; adding sodium hydroxide and concentrated sulfuric acid to adjust the pH to be 4; stopping heating the adjusted mixed liquor; placing the adjusted mixed liquor in an ice-water bath; lowering the temperature to be 20-25 DEG C for crystallization to completely separate crystals; taking out the crystals. The ammonia nitrogen recovery method is higher in recovery rate and simple to operate, is safe and cannot cause secondary pollution.
Description
Technical field
The present invention relates to ammonia nitrogen recovery method in a kind of plant natural pond liquid, belong to sewage treatment area.
Background technology
Along with developing rapidly of industrial and agricultural production and improving constantly of living standards of the people, the quantity discharged of China's ammonia nitrogen pollutant sharply increases, a large amount of trade effluents and the discharge of agricultural effluent, cause serious ammonia and nitrogen pollution, water body is made to cause serious body eutrophication, serious impact is caused on all conglomeraties such as agricultural, fishery, tourism, tap water and food safety is formed and greatly threatens.
At present, the process waste water in traditional technology can not meet society of today far away, recycles the object more and more becoming countries in the world scholar's research and pay close attention to; Now, the method for process ammonia nitrogen waste water is blow-off method, and blow-off method generally adopts stripping tower, if to the ammonia of producing by boasting not in time recovery can cause secondary pollution, and the investment of whole technological process is comparatively large, and running cost is higher; So need a kind of rate of recovery higher, safety, simple to operate, the method for secondary pollution can not be caused particularly necessary.
Summary of the invention
The technical problem that the present invention mainly solves is: comparatively large for common recovery ammonia nitrogen method investment, the problem that cost is higher, provide ammonia nitrogen recovery method in a kind of plant natural pond liquid, the rate of recovery is higher, safety, simple to operate, can not cause secondary pollution.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is:
(1) get certain plant 500mL natural pond fluid samples, add 20g lime powder in the sample, fully stir 20 minutes, make the ammonia nitrogen in sample become free ammonia nitrogen ion;
(2) above-mentioned sample is filtered, extract filtrate, in the filtrate after suction filtration, add 2g magnesium ammonium phosphate and 1.8g magnesium chloride, slowly stir and start to reflux after being warming up to 70 ~ 90 DEG C, refluxing after 2 hours, stopped reaction;
(3) continue the 0.68mol/L 16 water alum liquor adding 30mL in above-mentioned mixed solution, continue to be warming up to 110 ~ 130 DEG C, stir at this temperature, stirring duration is 10 minutes, regulates pH to be 4 simultaneously;
(4) mixed solution regulating pH value is removed heating, put into ice-water bath, when cooling the temperature to 20 ~ 25 DEG C, start crystallization, when complete crystallization, crystallization is taken out.
Described adjustment pH adopts the sodium hydroxide of titration 2mol/L and the method for the 0.46mol/L vitriol oil.
Application method of the present invention is:
(1) get 500mL natural pond fluid samples in certain plant, recording ammonia-nitrogen content by spectrophotometer survey method is 1120mg/L ~ 1300mg/L, adds 20g lime powder in the liquid of natural pond, fully stirs 20 minutes, makes ammonia nitrogen become free ammonia nitrogen ion;
(2) filter, extract filtrate, in filtrate, add 2g magnesium ammonium phosphate and 1.8g magnesium chloride, slowly stir and be warming up to 70 ~ 90 DEG C of backflows, refluxing 2 hours, stopped reaction;
(3) continue in mixed solution, add 30mL0.68mol/L 16 water alum liquor, continue to be warming up to 110 ~ 130 DEG C, again stir 10 minutes at temperature, the vitriol oil of the sodium hydroxide and 0.46mol/L that add 2mol/L regulates pH to be 4;
(4) mixed solution regulated is removed heating, put into ice-water bath, cool the temperature to 20 ~ 25 DEG C of crystallizations, complete crystallization, crystallization taken out, detect filtrate, in filtrate, ammonia nitrogen concentration is 8.20mg/L, and the rate of recovery is 99%.
The invention has the beneficial effects as follows: (1) is simple to operate, and the rate of recovery is high; (2) cost is lower can not cause secondary pollution; (3) rate of recovery is high, can reach 99%.
specific embodiments:
Get certain plant 500mL natural pond fluid samples, add 20g lime powder in the sample, fully stir 20 minutes, make the ammonia nitrogen in sample become free ammonia nitrogen ion; Above-mentioned sample is filtered, extracts filtrate, in the filtrate after suction filtration, add 2g magnesium ammonium phosphate and 1.8g magnesium chloride, slowly stir and start to reflux after being warming up to 70 ~ 90 DEG C, refluxing after 2 hours, stopped reaction; Continue the 0.68mol/L 16 water alum liquor adding 30mL in above-mentioned mixed solution, continue to be warming up to 110 ~ 130 DEG C, stir at this temperature, stirring duration is 10 minutes, regulates pH to be 4 simultaneously; The mixed solution regulating pH value is removed heating, puts into ice-water bath, when cooling the temperature to 20 ~ 25 DEG C, start crystallization, when complete crystallization, crystallization is taken out; PH is wherein regulated to adopt the sodium hydroxide of titration 2mol/L and the method for the 0.46mol/L vitriol oil.
Get certain plant 500mL natural pond fluid samples, add 20g lime powder in the sample, fully stir 20 minutes, make the ammonia nitrogen in sample become free ammonia nitrogen ion; Above-mentioned sample is filtered, extracts filtrate, in the filtrate after suction filtration, add 2g magnesium ammonium phosphate and 1.8g magnesium chloride, slowly stir and start to reflux after being warming up to 70 DEG C, refluxing after 2 hours, stopped reaction; Continue the 0.68mol/L 16 water alum liquor adding 30mL in above-mentioned mixed solution, continue to be warming up to 110 DEG C, stir at this temperature, stirring duration is 10 minutes, regulates pH to be 4 simultaneously; The mixed solution regulating pH value is removed heating, puts into ice-water bath, when cooling the temperature to 20 DEG C, start crystallization, when complete crystallization, crystallization is taken out; PH is wherein regulated to adopt the sodium hydroxide of titration 2mol/L and the method for the 0.46mol/L vitriol oil; Method is simple to operate, and the rate of recovery is high, and cost is lower can not cause secondary pollution.
Get certain plant 500mL natural pond fluid samples, add 20g lime powder in the sample, fully stir 20 minutes, make the ammonia nitrogen in sample become free ammonia nitrogen ion; Above-mentioned sample is filtered, extracts filtrate, in the filtrate after suction filtration, add 2g magnesium ammonium phosphate and 1.8g magnesium chloride, slowly stir and start to reflux after being warming up to 80 DEG C, refluxing after 2 hours, stopped reaction; Continue the 0.68mol/L 16 water alum liquor adding 30mL in above-mentioned mixed solution, continue to be warming up to 120 DEG C, stir at this temperature, stirring duration is 10 minutes, regulates pH to be 4 simultaneously; The mixed solution regulating pH value is removed heating, puts into ice-water bath, when cooling the temperature to 23 DEG C, start crystallization, when complete crystallization, crystallization is taken out; PH is wherein regulated to adopt the sodium hydroxide of titration 2mol/L and the method for the 0.46mol/L vitriol oil; Method is simple to operate, and the rate of recovery is high, and cost is lower can not cause secondary pollution.
Get certain plant 500mL natural pond fluid samples, add 20g lime powder in the sample, fully stir 20 minutes, make the ammonia nitrogen in sample become free ammonia nitrogen ion; Above-mentioned sample is filtered, extracts filtrate, in the filtrate after suction filtration, add 2g magnesium ammonium phosphate and 1.8g magnesium chloride, slowly stir and start to reflux after being warming up to 90 DEG C, refluxing after 2 hours, stopped reaction; Continue the 0.68mol/L 16 water alum liquor adding 30mL in above-mentioned mixed solution, continue to be warming up to 130 DEG C, stir at this temperature, stirring duration is 10 minutes, regulates pH to be 4 simultaneously; The mixed solution regulating pH value is removed heating, puts into ice-water bath, when cooling the temperature to 25 DEG C, start crystallization, when complete crystallization, crystallization is taken out; PH is wherein regulated to adopt the sodium hydroxide of titration 2mol/L and the method for the 0.46mol/L vitriol oil; Method is simple to operate, and the rate of recovery is high, and cost is lower can not cause secondary pollution.
Claims (2)
1. an ammonia nitrogen recovery method in the liquid of plant natural pond, is characterized in that concrete operation step is:
(1) get certain plant 500mL natural pond fluid samples, add 20g lime powder in the sample, fully stir 20 minutes, make the ammonia nitrogen in sample become free ammonia nitrogen ion;
(2) above-mentioned sample is filtered, extract filtrate, in the filtrate after suction filtration, add 2g magnesium ammonium phosphate and 1.8g magnesium chloride, slowly stir and start to reflux after being warming up to 70 ~ 90 DEG C, refluxing after 2 hours, stopped reaction;
(3) continue the 0.68mol/L 16 water alum liquor adding 30mL in above-mentioned mixed solution, continue to be warming up to 110 ~ 130 DEG C, stir at this temperature, stirring duration is 10 minutes, regulates pH to be 4 simultaneously;
(4) mixed solution regulating pH value is removed heating, put into ice-water bath, when cooling the temperature to 20 ~ 25 DEG C, start crystallization, when complete crystallization, crystallization is taken out.
2. ammonia nitrogen recovery method in a kind of plant according to claim 1 natural pond liquid, is characterized in that: regulate pH to use the sodium hydroxide of 2mol/L and the vitriol oil of 0.46mol/L.
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| CN201510421850.3A CN105060543A (en) | 2015-07-18 | 2015-07-18 | Ammonia nitrogen recovery method for biogas slurry in farm |
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| CN201510421850.3A CN105060543A (en) | 2015-07-18 | 2015-07-18 | Ammonia nitrogen recovery method for biogas slurry in farm |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108218571A (en) * | 2018-01-13 | 2018-06-29 | 常州大学 | A kind of distributing pig farm fermentation waste prepares slow-release fertilizer method with zeolite compound |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101186408A (en) * | 2007-12-11 | 2008-05-28 | 南京大学 | Method for removing ammonia and nitrogen in garbage percolate |
| CN102795725A (en) * | 2012-08-23 | 2012-11-28 | 鄂尔多斯市东胜区传祥垃圾处理有限责任公司 | Method for whole-process recycling of multiple biogas slurry components |
| CN204097166U (en) * | 2014-08-09 | 2015-01-14 | 高小平 | GXP precipitator method ammonia nitrogen wastewater treatment device |
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2015
- 2015-07-18 CN CN201510421850.3A patent/CN105060543A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101186408A (en) * | 2007-12-11 | 2008-05-28 | 南京大学 | Method for removing ammonia and nitrogen in garbage percolate |
| CN102795725A (en) * | 2012-08-23 | 2012-11-28 | 鄂尔多斯市东胜区传祥垃圾处理有限责任公司 | Method for whole-process recycling of multiple biogas slurry components |
| CN204097166U (en) * | 2014-08-09 | 2015-01-14 | 高小平 | GXP precipitator method ammonia nitrogen wastewater treatment device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108218571A (en) * | 2018-01-13 | 2018-06-29 | 常州大学 | A kind of distributing pig farm fermentation waste prepares slow-release fertilizer method with zeolite compound |
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Application publication date: 20151118 |