CN103848540A - Technique for processing ammonia-nitrogen wastewater employing struvite formation - Google Patents
Technique for processing ammonia-nitrogen wastewater employing struvite formation Download PDFInfo
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- CN103848540A CN103848540A CN201410012829.3A CN201410012829A CN103848540A CN 103848540 A CN103848540 A CN 103848540A CN 201410012829 A CN201410012829 A CN 201410012829A CN 103848540 A CN103848540 A CN 103848540A
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Abstract
The invention relates to a technique for processing an ammonia-nitrogen wastewater employing struvite formation. The technique comprises the following steps: adding certain magnesium source and phosphorus source to the wastewater, controlling a certain pH value; participating the sediments at the bottom of a reactor after reaction; separating out struvite by solid-liquid separation; entering the wastewater to an anaerobic tank to further process, and marketing the discharged struvite as a controlled release fertilizer, wherein the magnesium source and the phosphorus source respectively are magnesium chloride and sodium hydrogen phosphate; the optimal molar ratio of Mg to N to P is 1.2:1:0.8; the initial ammonia-nitrogen concentration is 210-1260mg/L; the pH of the wastewater is controlled to be 8-9; the solution for adjusting the pH to 2-6mol/L is a sodium hydroxide solution. The technical scheme provided by the invention cannot be limited by the temperature and toxin in water, the design and operation are simple, high-concentration ammonia-nitrogen wastewater can be effectively processed, and the generated struvite sediment is a good controlled release fertilizer. Thus, resource recycling of ammonia-nitrogen is achieved.
Description
Technical field
The present invention relates to a kind of processing method of processing waste water of chemical field, particularly relate to a kind of processing method of struvite precipitator method processing ammonia nitrogen waste water.
Background technology
Industrialized fast development has produced increasing waste water, and these waste water, if do not processed in time, certainly will cause a significant threat global environment and human health.Organic amine product is the important industrial chemicals that purposes is the widest, and in its factory effluent, most of material all contains amino, and these compositions can discharge a large amount of ammonia nitrogens in biodegradation process, need to further remove.The treatment process of high-concentration ammonia nitrogenous wastewater is a lot, as blow-off method, biological process, ion exchange method, the precipitator method etc.Blow-off method energy consumption is large, running cost is high, easy fouling, and cold season stripping efficiency lower.Biological process floor space is large, speed of response is slow, the sludge acclimatization time is long, and undesirable to high-concentration ammonia nitrogenous wastewater treatment effect.
The struvite precipitator method are a kind of new ammonia nitrogen waste water treatment method rising the nineties in 20th century, better to high-concentration ammonia nitrogenous wastewater treatment effect.It is to react with the ammonia nitrogen in waste water and generate precipitation and reach and eliminate the object of ammonia nitrogen by adding certain He Lin source, magnesium source.The magnesium ammonium phosphate sediment wherein generating is a kind of well slow release fertilizer, thereby has realized the resource utilization reuse of ammonia nitrogen.And struvite precipitin reaction is not subject to the restriction of temperature and water intoxication element, design and operation are all very simple, and Low Concentration Ammonia Containing Wastewater is had to certain removal effect, and the ammonia nitrogen waste water of high density is had to very high removal effect.
The struvite precipitator method have efficient, easy feature for the ammonia nitrogen of removing in water.In coking chemical waste water, contain a large amount of organism, volatile phenol, cyanogen etc., ammonia-nitrogen content is high, complicated component, and the coking chemical waste water that the struvite precipitator method are 200-1000mg/L for ammonia nitrogen concentration has higher clearance.
Percolate is that a kind of water quality and the water yield change greatly, COD concentration is high, ammonia-nitrogen content is high, the difficult sewage of microbial nutrition element ratio imbalance, with struvite precipitator method treating refuse percolate, can make the ammonia-nitrogen content of sewage be reduced to 60mg/L from 5500mg/L, and the struvite crystallization generating is very low for the metal ion in percolate and impurity absorption amount.
Breeding wastewater organic concentration is high, and suspended substance is many, and ammonia-nitrogen content is large, processes breeding wastewater can make ammonia-nitrogen content reduce by 90% by the struvite precipitator method.
In a word, the struvite precipitator method are a kind of novel ammonia nitrogen waste water treatment methods, and it has broad application prospects in ammonia nitrogen waste water is processed.
Summary of the invention
The object of the invention is to, provide a kind of struvite precipitator method to process the processing method of ammonia nitrogen waste water, technical problem to be solved is to make ammonia nitrogen waste water treatment method simple, be not subject to the restriction of temperature and water intoxication element, can effectively process the ammonia nitrogen waste water of high density, realize the resource utilization of ammonia nitrogen and reply utilization, thereby be more suitable for practicality.
The object of the invention to solve the technical problems realizes by the following technical solutions.A kind of struvite precipitator method that propose according to the present invention are processed the processing method of ammonia nitrogen waste water, wherein said processing method is: in ammonia nitrogen waste water, add He Lin source, magnesium source, add alkali lye to control pH value, after reaction, precipitate is at reactor bottom, isolate struvite through solid-liquid separation, remaining sewage enters anaerobic pond and further processes.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
The aforesaid struvite precipitator method are processed the processing method of ammonia nitrogen waste water, and the starting point concentration of wherein said ammonia nitrogen waste water is 210-1260mg/L.
The aforesaid struvite precipitator method are processed the processing method of ammonia nitrogen waste water, and wherein said magnesium source is magnesium chloride, and described phosphorus source is sodium hydrogen phosphate, and the optimum mole ratio of Mg:N:P when reaction in reactor is 1.2:1:0.8.
The aforesaid struvite precipitator method are processed the processing method of ammonia nitrogen waste water, and wherein said pH value is controlled between 8-9.
The aforesaid struvite precipitator method are processed the processing method of ammonia nitrogen waste water, and wherein said alkali lye is that concentration is the sodium hydroxide solution of 2-6mol/L.
The aforesaid struvite precipitator method are processed the processing method of ammonia nitrogen waste water, and wherein said struvite precipitation is a kind of good slow release fertilizer.
By technique scheme, the processing method that a kind of struvite precipitator method of the present invention are processed ammonia nitrogen waste water at least has following advantages: the present invention is not subject to the restriction of temperature and water intoxication element, design and operation are all very simple, can effectively process the ammonia nitrogen waste water of high density, and the struvite generating precipitation is a kind of good slow release fertilizer, thereby has realized the resource utilization reuse of ammonia nitrogen.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technique means of the present invention, and can be implemented according to the content of specification sheets, and for above and other object of the present invention, feature and advantage can be become apparent, especially exemplified by preferred embodiment, be described in detail as follows below.
Embodiment
Technique means and effect of taking for reaching predetermined goal of the invention for further setting forth the present invention, below in conjunction with preferred embodiment, its embodiment of processing method, step, feature and effect thereof of a kind of struvite precipitator method that propose according to the present invention being processed to ammonia nitrogen waste water, be described in detail as follows.
Processing method of the present invention comprises the struvite precipitator method processing influence factor of ammonia nitrogen waste water and the optimal processing parameter for the treatment of processes.
Processing method of the present invention is specially: in waste water, add certain He Lin source, magnesium source, control certain pH value, after reaction, precipitate is at reactor bottom, isolate struvite through solid-liquid separation, sewage enters anaerobic pond and further processes, and the struvite of discharge is sold as slow release fertilizer.
In above-mentioned technique, described He Lin source, magnesium source is respectively magnesium chloride and sodium hydrogen phosphate, and the optimum mole ratio of Mg:N:P is 1.2:1:0.8, and ammonia nitrogen starting point concentration is 210-1260mg/L, wastewater pH is controlled at 8-9, regulates the sodium hydroxide solution that pH solution used is 2-6mol/L.
The principle that the struvite precipitator method are removed ammonia nitrogen can be described as:
Mg
2++PO
4 3-+NH
4 ++6H
2O→MgNH
4PO
4·6H
2O （1）
Mg
2++HPO
4 2-+NH
4 ++6H
2O→MgNH
4PO
4·6H
2O+H
+ （2）
Mg
2++H
2PO
4 -+NH
4 ++6H
2O→MgNH
4PO
4·6H
2O+2H
+ （3）
The formation of struvite is subject to the impact of pH value of solution very large, and suitable pH can make the speed of growth of struvite crystallization keep constant, thereby grows the good struvite crystals of quality, and the utilization ratio of the struvite precipitation producing in processing for ammonia nitrogen waste water can improve a lot.In addition, suitable pH contributes to improve the decreasing ratio of ammonia nitrogen, therefore waste water is adjusted to most important that suitable pH shows.
Mg:N:P reacts with the ratio of 1:1:1, if increase the usage quantity in He Lin source, magnesium source, will make reaction carry out to the right, increased the clearance to ammonia nitrogen, but increasing phosphorus source will cause the increase of phosphor in sewage content after treatment, thereby has brought secondary pollution.Therefore in the time selecting to add ratio, can suitably increase the usage quantity in magnesium source, reduce the usage quantity in phosphorus source simultaneously.
Under same pH condition, the starting point concentration of ammonia nitrogen is larger, and this method is higher to the clearance of ammonia nitrogen, and therefore, this method has good removal effect to high-concentration ammonia nitrogenous wastewater, but Low Concentration Ammonia Containing Wastewater is also had to certain removal effect.
Processing method of the present invention is applicable to the denitrification process of the sewage after precipitation separation, after denitrification process completes, then sewage is pumped into anaerobic technique is further processed.
Take the waste water on certain pig farm as experiment water quality, after measured, its pH is 7.4 below, and ammonia nitrogen concentration is 1260mg/L.
Embodiment 1
Get 500mL waste water, the mode that is 1:1:1 according to the mol ratio of Mg:N:P adds different He Lin sources, magnesium source, with the sodium hydroxide solution regulator solution pH to 8.5 of 3mol/L, stirring makes to react 15min, leave standstill 10min, after solid-liquid separation, get filtrate mensuration, the results are shown in Table 1.
Table 1.
| Sequence number | He Lin source, magnesium source | Ammonia nitrogen removal frank | Phosphorus residual content/(mg/L) |
| 1 | Magnesium chloride and sodium hydrogen phosphate | 86% | 40.59 |
| 2 | Magnesium sulfate and sodium hydrogen phosphate | 78% | 263.55 |
| 3 | Magnesium oxide and phosphoric acid | 70% | 289.43 |
From above-mentioned table 1, can find out, what ammonia nitrogen removal frank was the highest and phosphorus residual content is minimum is the reaction that uses magnesium chloride and sodium hydrogen phosphate, so magnesium of the present invention source optimal selection is magnesium chloride, and the optimal selection in phosphorus source is sodium hydrogen phosphate.
Embodiment 2
Get 500mL waste water, add according to a certain percentage magnesium chloride and sodium hydrogen phosphate as He Lin source, magnesium source, with the sodium hydroxide solution regulator solution pH to 8.5 of 3mol/L, stir and make to react 15min, leave standstill 10min, after solid-liquid separation, get filtrate mensuration, the results are shown in Table 2.
Table 2.
| Sequence number | Mg:N:P mol ratio | Ammonia nitrogen removal frank | Phosphorus residual content/(mg/L) |
| 1 | 1:1:1 | 86% | 40.59 |
| 2 | 1.2:1:1 | 89% | 37.48 |
| 3 | 1.2:1:0.8 | 96% | 20.67 |
| 4 | 1.4:1:0.8 | 94% | 18.96 |
From above-mentioned table 2, can find out, ratio the best of Mg:N:P mol ratio when the highest and phosphorus residual content of ammonia nitrogen removal frank is less is 1.2:1:0.8.
Embodiment 3
Get 500mL waste water, the mode that is 1.2:1:0.8 according to the mol ratio of Mg:N:P adds magnesium chloride and sodium hydrogen phosphate respectively as He Lin source, magnesium source, with the extremely different pH of sodium hydroxide solution regulator solution of 3mol/L, stirring makes to react 15min, leave standstill 10min, after solid-liquid separation, get filtrate mensuration, the results are shown in Table 3.
Table 3.
| Sequence number | PH | Ammonia nitrogen removal frank | Phosphorus residual content/(mg/L) |
| 1 | 7.4 | 69% | 124.66 |
| 2 | 8.1 | 94% | 39.27 |
| 3 | 9.2 | 95% | 41.58 |
| 4 | 10.1 | 81% | 82.35 |
From above-mentioned table 3, can find out, ammonia nitrogen removal frank is higher is respectively 8.1 and 9.2 with the less pH of phosphorus residual content, so the present invention is controlled at pH value between 8-9 most suitable.
Embodiment 4
Waste water is diluted respectively to different multiples, get the waste water that 500mL diluted, the mode that is 1.2:1:0.8 according to the mol ratio of Mg:N:P adds magnesium chloride and sodium hydrogen phosphate as He Lin source, magnesium source, with the sodium hydroxide solution regulator solution pH to 8.5 of 3mol/L, stirring makes to react 15min, leave standstill 10min, after solid-liquid separation, get filtrate mensuration, the results are shown in Table 4.
Table 4.
| Sequence number | The starting point concentration of ammonia nitrogen waste water/(mg/L) | Ammonia nitrogen removal frank | Phosphorus residual content/(mg/L) |
| 1 | 210 | 67% | 132.66 |
| 2 | 400 | 79% | 94.53 |
| 3 | 630 | 84% | 87.42 |
| 4 | 840 | 90% | 61.78 |
| 5 | 1260 | 96% | 44.51 |
As can be seen from Table 4, under same pH condition, ammonia nitrogen starting point concentration is higher, the method is higher to the clearance of ammonia nitrogen, phosphorus residual content is also fewer, but ammonia nitrogen starting point concentration is while being 210mg/L, and the present invention still can reach 67% to the clearance of ammonia nitrogen, therefore the ammonia nitrogen starting point concentration that, the present invention adapts to is 210-1260mg/L.
The above, it is only preferred embodiment of the present invention, not the present invention is done to any pro forma restriction, although the present invention discloses as above with preferred embodiment, but not in order to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, when can utilizing the technology contents of above-mentioned announcement to make a little change or being modified to the equivalent embodiment of equivalent variations, in every case be the content that does not depart from technical solution of the present invention, foundation technical spirit of the present invention is to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (6)
1. the processing method of a struvite precipitator method processing ammonia nitrogen waste water, it is characterized in that described processing method is: in ammonia nitrogen waste water, add He Lin source, magnesium source, add alkali lye to control pH value, after reaction, precipitate is at reactor bottom, isolate struvite through solid-liquid separation, remaining sewage enters anaerobic pond and further processes.
2. the struvite precipitator method according to claim 1 are processed the processing method of ammonia nitrogen waste water, it is characterized in that: the starting point concentration of described ammonia nitrogen waste water is 210-1260mg/L.
3. the struvite precipitator method according to claim 1 are processed the processing method of ammonia nitrogen waste water, it is characterized in that: described magnesium source is magnesium chloride, and described phosphorus source is sodium hydrogen phosphate, and the optimum mole ratio of Mg:N:P when reaction in reactor is 1.2:1:0.8.
4. the struvite precipitator method according to claim 1 are processed the processing method of ammonia nitrogen waste water, it is characterized in that: described pH value is controlled between 8-9.
5. the struvite precipitator method according to claim 1 are processed the processing method of ammonia nitrogen waste water, it is characterized in that: described alkali lye is that concentration is the sodium hydroxide solution of 2-6mol/L.
6. the struvite precipitator method according to claim 1 are processed the processing method of ammonia nitrogen waste water, it is characterized in that: described struvite precipitation is a kind of good slow release fertilizer.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107601716A (en) * | 2017-10-24 | 2018-01-19 | 上海纳米技术及应用国家工程研究中心有限公司 | The method for improving guanite precipitation method processing ammonia nitrogen waste water efficiency |
| CN109502720A (en) * | 2018-12-14 | 2019-03-22 | 上海电力学院 | A method of nitrogen phosphorus in waste water is removed using magnesium salts in desulfurization wastewater |
| RU2715529C1 (en) * | 2019-09-16 | 2020-02-28 | Акционерное общество "Газпромнефть - Омский НПЗ" (АО "Газпромнефть-ОНПЗ") | Method of treating waste water from ammonium ions |
| CN111763103A (en) * | 2020-06-01 | 2020-10-13 | 东方电气集团东方锅炉股份有限公司 | Process for preparing calcium magnesium ammonium phosphate from desulfurization wastewater, landfill leachate and phosphorus-containing wastewater |
| CN112551729A (en) * | 2021-01-06 | 2021-03-26 | 南京万德斯环保科技股份有限公司 | Treatment method for removing ammonia nitrogen from kitchen wastewater |
| CN112607929A (en) * | 2020-11-25 | 2021-04-06 | 湖南鑫远环境科技股份有限公司 | Method and device for reinforced recovery of nitrogen and phosphorus from struvite |
| CN112897493A (en) * | 2021-02-04 | 2021-06-04 | 中国科学院生态环境研究中心 | Method for recovering nitrogen and phosphorus in waste liquid by using magnesium-alkali releasing functional mineral material |
| WO2021148688A1 (en) * | 2020-01-22 | 2021-07-29 | Fertinagro Biotech, S.L. | Fertiliser composition including struvite and syringic acid as an enhancer of the biological solubilisation of struvite and use thereof |
| RU2775771C1 (en) * | 2021-12-07 | 2022-07-08 | федеральное государственное автономное образовательное учреждение высшего образования "Пермский национальный исследовательский политехнический университет" | Method for extraction of magnesium-ammonium-phosphate from wastewater |
| CN114835297A (en) * | 2022-05-17 | 2022-08-02 | 南京传业环保科技有限公司 | Automatic nitrogen and phosphorus recovery equipment and method for low-concentration aquaculture wastewater |
| CN114904480A (en) * | 2022-05-06 | 2022-08-16 | 华南农业大学 | Method for producing MAP carbon-based material by recovering nitrogen and phosphorus from biogas slurry in pig farm |
| CN116588912A (en) * | 2023-05-18 | 2023-08-15 | 生态环境部南京环境科学研究所 | Method for preparing struvite by utilizing fly ash aluminum ash to cooperate with nitrogen and phosphorus containing wastewater treatment |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107601716A (en) * | 2017-10-24 | 2018-01-19 | 上海纳米技术及应用国家工程研究中心有限公司 | The method for improving guanite precipitation method processing ammonia nitrogen waste water efficiency |
| CN109502720A (en) * | 2018-12-14 | 2019-03-22 | 上海电力学院 | A method of nitrogen phosphorus in waste water is removed using magnesium salts in desulfurization wastewater |
| RU2715529C1 (en) * | 2019-09-16 | 2020-02-28 | Акционерное общество "Газпромнефть - Омский НПЗ" (АО "Газпромнефть-ОНПЗ") | Method of treating waste water from ammonium ions |
| WO2021148688A1 (en) * | 2020-01-22 | 2021-07-29 | Fertinagro Biotech, S.L. | Fertiliser composition including struvite and syringic acid as an enhancer of the biological solubilisation of struvite and use thereof |
| CN111763103A (en) * | 2020-06-01 | 2020-10-13 | 东方电气集团东方锅炉股份有限公司 | Process for preparing calcium magnesium ammonium phosphate from desulfurization wastewater, landfill leachate and phosphorus-containing wastewater |
| CN112607929A (en) * | 2020-11-25 | 2021-04-06 | 湖南鑫远环境科技股份有限公司 | Method and device for reinforced recovery of nitrogen and phosphorus from struvite |
| CN112551729A (en) * | 2021-01-06 | 2021-03-26 | 南京万德斯环保科技股份有限公司 | Treatment method for removing ammonia nitrogen from kitchen wastewater |
| CN112897493B (en) * | 2021-02-04 | 2023-03-21 | 中国科学院生态环境研究中心 | Method for recovering nitrogen and phosphorus in waste liquid by using magnesium-alkali releasing functional mineral material |
| CN112897493A (en) * | 2021-02-04 | 2021-06-04 | 中国科学院生态环境研究中心 | Method for recovering nitrogen and phosphorus in waste liquid by using magnesium-alkali releasing functional mineral material |
| RU2775771C1 (en) * | 2021-12-07 | 2022-07-08 | федеральное государственное автономное образовательное учреждение высшего образования "Пермский национальный исследовательский политехнический университет" | Method for extraction of magnesium-ammonium-phosphate from wastewater |
| CN114904480A (en) * | 2022-05-06 | 2022-08-16 | 华南农业大学 | Method for producing MAP carbon-based material by recovering nitrogen and phosphorus from biogas slurry in pig farm |
| CN114835297A (en) * | 2022-05-17 | 2022-08-02 | 南京传业环保科技有限公司 | Automatic nitrogen and phosphorus recovery equipment and method for low-concentration aquaculture wastewater |
| RU2787874C1 (en) * | 2022-07-28 | 2023-01-13 | федеральное государственное автономное образовательное учреждение высшего образования "Пермский национальный исследовательский политехнический университет" | Method for utilization of ammonia from scrubber water to obtain struvite |
| RU2792126C1 (en) * | 2022-12-28 | 2023-03-16 | федеральное государственное автономное образовательное учреждение высшего образования "Пермский национальный исследовательский политехнический университет" | Method for extraction of magnesium-ammonium-phosphate from wastewater |
| CN116588912A (en) * | 2023-05-18 | 2023-08-15 | 生态环境部南京环境科学研究所 | Method for preparing struvite by utilizing fly ash aluminum ash to cooperate with nitrogen and phosphorus containing wastewater treatment |
| CN116588912B (en) * | 2023-05-18 | 2023-11-14 | 生态环境部南京环境科学研究所 | Method for preparing struvite by utilizing fly ash aluminum ash to cooperate with nitrogen and phosphorus containing wastewater treatment |
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Application publication date: 20140611 |