CN107686192A - A kind of phosphorous and Ammonia-nitrogen wastewater treatment technology - Google Patents
A kind of phosphorous and Ammonia-nitrogen wastewater treatment technology Download PDFInfo
- Publication number
- CN107686192A CN107686192A CN201710897771.9A CN201710897771A CN107686192A CN 107686192 A CN107686192 A CN 107686192A CN 201710897771 A CN201710897771 A CN 201710897771A CN 107686192 A CN107686192 A CN 107686192A
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- Prior art keywords
- ammonia
- filtrate
- nitrogen
- phosphorous
- calcium
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
Abstract
The present invention provides a kind of phosphorous and Ammonia-nitrogen wastewater treatment technology, comprises the following steps：(1) magnesium monohydrogen phosphate removal of ammonia and nitrogen is added in phosphorous and ammonia nitrogen waste water, obtains the suspension of ammonium magnesium phosphate, is filtered, collects ammonium magnesium phosphate precipitation and filtrate one respectively；(2) lime removing phosphorus is added in filtrate one, the suspension of phosphoric acid calcium, magnesium hydroxide and a small amount of calcium hydroxide is obtained, filters, collect mixture precipitation and filtrate two respectively；(3) carbon dioxide eliminating residual calcium ion is passed through in filtrate two, obtains the suspension of calcium carbonate, is filtered, collects calcium carbonate and filtrate three respectively, filtrate three is the processing water for removing phosphorus and ammonia nitrogen.Energy of the invention while phosphorus and ammonia nitrogen harmful substance in efficient removal waste water, the wastewater pH after removing is close to neutrality, and wherein phosphorus content is down to below 1mg/L, ammonia-nitrogen content is down to below 25mg/L, and valuable constituent ammonium magnesium phosphate is obtained, recycling is prepared with realizing pollutant, and the water quality after processing is preferable.
Description
Technical field
The invention belongs to Environmental Chemistry technical field, and in particular to a kind of phosphorous and Ammonia-nitrogen wastewater treatment technology.
Background technology
The main reason for ammonia nitrogen and phosphate are Water Eutrophications.The eutrophic lake caused by nitrogen and phosphorus pollution
Account for the 56% of statistics lake.Body eutrophication can cause algae and microorganism amount reproduction, even can make water when seriously polluted
Middle dissolved oxygen amount declines, and causes fish mortality etc. to endanger.
Phosphorous and ammonia nitrogenous wastewater treatment technology more popular at present is the ammonium magnesium phosphate precipitation method.Patent CN102963970A
Propose a kind of device and technique that nitrogen phosphorus in sewage is prepared into struvite crystals, guanite (ammonium magnesium phosphate MgNH4PO4·
6H2O it is) a kind of double salt for being insoluble in water, using the characteristic crystallized under the salt low concentration, ammonium salt and phosphate can be removed simultaneously,
And product can be used as manure resources, to reach the purpose to turn waste into wealth.The technique include regulation pH, stripping, guanite precipitation,
Crystallization, discharging process.But magnesium chloride and phosphate are added in the process treatment process, to that containing the high ion of ammonia nitrogen, can cause
Chloride concentration is higher in water, can also make water degradation while processing.Simultaneously as ammonium magnesium phosphate has certain dissolving in water
Degree, and ammonium and phosphate anion are difficult to while high efficiency removes, the comprehensive removal index of ammonia nitrogen and phosphorus is poor.
Patent CN105417771A proposes a kind of high-efficient denitrification and dephosphorization and resource recovery process of ferric phosphate production waste water
With equipment, the technique first adds magnesia goes iron ions to form iron hydroxide into waste water, then continues to add in filtrate
Enter magnesia, obtain ammonium magnesium phosphate precipitation and filter off and remove, third time adds magnesia and removes ammonia nitrogen with anti-de- technique.The technique is given birth to
Into in ammonium magnesium phosphate step, soluble magnesium ion source is in neutralization and displacement iron ion process, but magnesia is in neutral or alkalescence
Indissoluble in medium, therefore the ammonium magnesium phosphate under neutral or alkaline environment is difficult to generate.The technique is only applicable to acid waste water, application
PH scopes are restricted.
To sum up, new chlorion and sulfate radical can be introduced by going to denitrogenate phosphorus technique one side using the ammonium magnesium phosphate precipitation method at present
Deng foreign ion, salinity is high, water quality inferiority, and another aspect nitrogen phosphorus removes that overall efficiency is poor simultaneously, is gone it is difficult to reach high simultaneously
Except rate.
The content of the invention
The problem of existing for prior art, the present invention provide a kind of new phosphorous and Ammonia-nitrogen wastewater treatment technology, the party
Method is higher to the clearance of ammonia nitrogen and phosphorus on the basis of new foreign ion is not introduced.The technical scheme is that：
A kind of phosphorous and Ammonia-nitrogen wastewater treatment technology, comprises the following steps：
(1) magnesium monohydrogen phosphate removal of ammonia and nitrogen is added in phosphorous and ammonia nitrogen waste water, obtains the suspension of ammonium magnesium phosphate, is filtered,
Ammonium magnesium phosphate precipitation and filtrate one are collected respectively；
(2) lime removing phosphorus is added in filtrate one, obtains the suspended of phosphoric acid calcium, magnesium hydroxide and a small amount of calcium hydroxide
Liquid, filtering, mixture precipitation and filtrate two is collected respectively；
(3) carbon dioxide eliminating residual calcium ion is passed through in filtrate two, obtains the suspension of calcium carbonate, is filtered, respectively
Calcium carbonate and filtrate three are collected, filtrate three is the processing water for removing phosphorus and ammonia nitrogen.
Further, the actual conditions of removal of ammonia and nitrogen is in the step (1)：The addition of magnesium monohydrogen phosphate is with magnesium monohydrogen phosphate
It is 1.2~3: 1 meter with the mol ratio of ammonia nitrogen ion in phosphorous and ammonia nitrogen waste water, the reaction time is 1~2h, stir speed (S.S.) 120
~600rpm.
Further, the actual conditions of removing phosphorus is in the step (2)：The addition of lime with calcium constituent in lime with
The mol ratio of P elements is 2~4: 1 meter in phosphorous and ammonia nitrogen waste water, and the reaction time be 1~2h, stir speed (S.S.) for 120~
600rpm。
Further, the terminal that carbon dioxide is passed through in the step (3) drops to 7.0~8.5 for reacting liquid pH value.
The present invention principle be：
Magnesium monohydrogen phosphate is added into phosphorous and ammonia nitrogen waste water, ammonia and ammonium salt therein is removed, because magnesium monohydrogen phosphate is in water
Solvable, being maintained at can make ammonia nitrogen removal frank high with the mol ratio of ammonia nitrogen ion for 1.2~3: 1, and reaction equation is as follows：
MgHPO4+NH3=MgNH4PO4↓
MgHPO4+NH4 +=MgNH4PO4↓+H+
Calcium hydroxide (white lime) or calcium oxide (quick lime) are added into filtrate one, magnesium ion therein, phosphate radical from
Son and phosphoric acid hydrogen ion are precipitated, and it is 2 to keep the mol ratio of calcium constituent and P elements in phosphorous and ammonia nitrogen waste water in lime
Can be such that phosphate radical removes fully at~4: 1, and reaction equation is as follows：
3Ca(OH)2+2PO4 3-=Ca3(PO4)2↓+6OH-
3Ca(OH)2+2MgHPO4=Ca3(PO4)2↓+2Mg(OH)2↓ ,+2H2O
Carbon dioxide is passed through in filtrate two, with remaining sl. sol. Ca (OH)2Reaction removes remaining Ca (OH)2Connect to pH
Weakly acidic pH, reaction equation are as follows：
Ca(OH)2+CO2=CaCO3↓+H2O
The beneficial effects of the invention are as follows：Energy of the invention while phosphorus and ammonia nitrogen harmful substance in efficient removal waste water, removing
Wastewater pH afterwards is close to neutrality, and wherein phosphorus content is down to below 1mg/L, and ammonia-nitrogen content is down to below 25mg/L, and is had
Valency composition ammonium magnesium phosphate, recycling preparation, the water quality after processing are preferable with realizing pollutant.
Brief description of the drawings
Fig. 1 is the process chart of the present invention.
Fig. 2 is the XRD spectrum of the ammonium magnesium phosphate solid of the embodiment of the present invention 1~3.
Embodiment
The phosphorous and ammonia nitrogen waste water that the embodiment of the present invention uses comes from Liaoning Fuxin sewage treatment plant.
Also, in the description of the invention, it is necessary to illustrate, unreceipted actual conditions person in embodiment, according to routine
The condition that condition or manufacturer suggest is carried out.Agents useful for same or the unreceipted production firm person of instrument, being can be by commercially available purchase
Buy the conventional products of acquisition.
The present invention is described in further details with reference to specific embodiment, it is described be explanation of the invention without
It is to limit.
Embodiment 1
Amount containing ammonia nitrogen is 360mg/L (equivalent N content) in phosphorous and ammonia nitrogen waste water, and phosphorus content is that (equivalent P contains 560mg/L
Amount), pH 5.7, using this PROCESS FOR TREATMENT waste water, treating capacity 100L, process chart is as shown in figure 1, including following step
Suddenly：
(1) three water magnesium monohydrogen phosphate removal of ammonia and nitrogen are added in phosphorous and ammonia nitrogen waste water, wherein the addition of three water magnesium monohydrogen phosphates
Measure and be：The mol ratio of three water magnesium monohydrogen phosphates and ammonia nitrogen ion is 1.2: 1, reaction time 2h, stir speed (S.S.) 600rpm, is obtained
The suspension of ammonium magnesium phosphate, filtering, ammonium magnesium phosphate precipitation and filtrate one is collected respectively；
(2) white lime removing phosphorus is added in filtrate one, the addition of wherein lime is：Calcium constituent and P elements in lime
Mol ratio be 2.5: 1 meters, reaction time 1.5h, stir speed (S.S.) 600rpm, obtain phosphoric acid calcium, magnesium hydroxide and a small amount of
The suspension of calcium hydroxide, filtering, mixture precipitation and filtrate two is collected respectively；
(3) carbon dioxide eliminating residual calcium ion is passed through in filtrate two, pH is down to 8.1 after being passed through 60min, stops logical
Enter, obtain the suspension of calcium carbonate, filter, collect calcium carbonate and filtrate three respectively, it is 13mg/ to detect ammonia-nitrogen content in filtrate three
L, phosphorus content 0.8mg/L, concentration of emission reach GB-89781996 secondary standards.
Embodiment 2
Amount containing ammonia nitrogen is 175mg/L (equivalent N content) in phosphorous and ammonia nitrogen waste water, and phosphorus content is that (equivalent P contains 230mg/L
Amount), pH 7.6, using this PROCESS FOR TREATMENT waste water, treating capacity 500L, process chart is as shown in figure 1, including following step
Suddenly：
(1) three water magnesium monohydrogen phosphate removal of ammonia and nitrogen are added in phosphorous and ammonia nitrogen waste water, wherein the addition of three water magnesium monohydrogen phosphates
Measure and be：The mol ratio of three water magnesium monohydrogen phosphates and ammonia nitrogen ion is 2.1: 1, reaction time 1.5h, stir speed (S.S.) 200rpm, is obtained
To the suspension of ammonium magnesium phosphate, filtering, ammonium magnesium phosphate precipitation and filtrate one are collected respectively；
(2) white lime removing phosphorus is added in filtrate one, the addition of wherein lime is：Calcium constituent and P elements in lime
Mol ratio for 3: 1 meter, reaction time 2h, stir speed (S.S.) 200rpm, obtain phosphoric acid calcium, magnesium hydroxide and a small amount of hydrogen-oxygen
Change the suspension of calcium, filtering, collect mixture precipitation and filtrate two respectively；
(3) carbon dioxide eliminating residual calcium ion is passed through in filtrate two, pH is down to 8.0 after being passed through 50min, stops logical
Enter, obtain the suspension of calcium carbonate, filter, collect calcium carbonate and filtrate three respectively, it is 10mg/ to detect ammonia-nitrogen content in filtrate three
L, phosphorus content 0.6mg/L, concentration of emission reach GB-89781996 secondary standards.
Embodiment 3
Amount containing ammonia nitrogen is 85mg/L (equivalent N content) in phosphorous and ammonia nitrogen waste water, and phosphorus content is that (equivalent P contains 97mg/L
Amount), pH 8.7, using this PROCESS FOR TREATMENT waste water, treating capacity 1T, process chart is as shown in figure 1, comprise the following steps：
(1) three water magnesium monohydrogen phosphate removal of ammonia and nitrogen are added in phosphorous and ammonia nitrogen waste water, wherein the addition of three water magnesium monohydrogen phosphates
Measure and be：The mol ratio of three water magnesium monohydrogen phosphates and ammonia nitrogen ion is 2.5: 1, reaction time 1h, stir speed (S.S.) 480rpm, is obtained
The suspension of ammonium magnesium phosphate, filtering, ammonium magnesium phosphate precipitation and filtrate one is collected respectively；
(2) white lime removing phosphorus is added in filtrate one, the addition of wherein lime is：Calcium constituent and P elements in lime
Mol ratio for 3: 1 meter, reaction time 1h, stir speed (S.S.) 480rpm, obtain phosphoric acid calcium, magnesium hydroxide and a small amount of hydrogen-oxygen
Change the suspension of calcium, filtering, collect mixture precipitation and filtrate two respectively；
(3) carbon dioxide eliminating residual calcium ion is passed through in filtrate two, pH is down to 7.2 after being passed through 40min, stops logical
Enter, obtain the suspension of calcium carbonate, filter, collect calcium carbonate and filtrate three respectively, it is 8mg/ to detect ammonia-nitrogen content in filtrate three
L, phosphorus content 0.4mg/L, concentration of emission reach GB-89781996 secondary standards.
The ammonium magnesium phosphate precipitation that embodiment 1~3 is obtained carries out XRD detections, and its result is as shown in Fig. 2 and standard card
PDF72-0380 contrasts understand that ammonium magnesium phosphate precipitation prepared by 3 embodiments is the higher ammonium magnesium phosphate crystal of purity, can be made
For ammonia nitrogen Fertilizer application.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (4)
1. a kind of phosphorous and Ammonia-nitrogen wastewater treatment technology, it is characterised in that comprise the following steps：
(1) magnesium monohydrogen phosphate removal of ammonia and nitrogen is added in phosphorous and ammonia nitrogen waste water, obtains the suspension of ammonium magnesium phosphate, is filtered, respectively
Collect ammonium magnesium phosphate precipitation and filtrate one；
(2) lime removing phosphorus is added in filtrate one, obtains the suspension of phosphoric acid calcium, magnesium hydroxide and a small amount of calcium hydroxide,
Filtering, mixture precipitation and filtrate two are collected respectively；
(3) carbon dioxide eliminating residual calcium ion is passed through in filtrate two, obtains the suspension of calcium carbonate, filters, collects respectively
Calcium carbonate and filtrate three, filtrate three are the processing water for removing phosphorus and ammonia nitrogen.
2. one kind according to claim 1 is phosphorous and Ammonia-nitrogen wastewater treatment technology, it is characterised in that in the step (1)
The actual conditions of removal of ammonia and nitrogen is：The addition of magnesium monohydrogen phosphate is rubbed with magnesium monohydrogen phosphate and ammonia nitrogen ion in phosphorous and ammonia nitrogen waste water
You for 1.2~3: 1 than counting, and the reaction time is 1~2h, and stir speed (S.S.) is 120~600rpm.
3. one kind according to claim 1 is phosphorous and Ammonia-nitrogen wastewater treatment technology, it is characterised in that in the step (2)
Removing phosphorus actual conditions be：The addition of lime is with the mol ratio of P elements in calcium constituent in lime and phosphorous and ammonia nitrogen waste water
For 2~4: 1 meter, the reaction time is 1~2h, and stir speed (S.S.) is 120~600rpm.
4. one kind according to claim 1 is phosphorous and Ammonia-nitrogen wastewater treatment technology, it is characterised in that in the step (3)
The terminal for being passed through carbon dioxide drops to 7.0~8.5 for reacting liquid pH value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710897771.9A CN107686192A (en) | 2017-09-28 | 2017-09-28 | A kind of phosphorous and Ammonia-nitrogen wastewater treatment technology |
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| CN201710897771.9A CN107686192A (en) | 2017-09-28 | 2017-09-28 | A kind of phosphorous and Ammonia-nitrogen wastewater treatment technology |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110746038A (en) * | 2019-10-11 | 2020-02-04 | 浙江先创能源科技股份有限公司 | Method for treating aquaculture water |
| CN113045022A (en) * | 2021-04-21 | 2021-06-29 | 新地环保技术有限公司 | Supercritical water oxidation treatment phosphorus-containing waste and phosphorus recovery method |
| CN115806373A (en) * | 2023-02-06 | 2023-03-17 | 山东泰和科技股份有限公司 | Treatment method of iron phosphate production wastewater |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07124571A (en) * | 1993-11-04 | 1995-05-16 | Ngk Insulators Ltd | Treatment process for organic drainage |
| CN103449584A (en) * | 2013-08-28 | 2013-12-18 | 大连东泰产业废弃物处理有限公司 | Ammonia-nitrogen wastewater treatment method |
| CN103466841A (en) * | 2013-09-27 | 2013-12-25 | 中南大学 | Ammonia-nitrogen wastewater treatment method |
| CN103936192A (en) * | 2014-04-02 | 2014-07-23 | 化工部长沙设计研究院 | High-concentration ammonia-nitrogen wastewater treatment process |
| CN105236668A (en) * | 2015-07-14 | 2016-01-13 | 南昌大学 | Magnesium hydrogen phosphate-assisted biological deamination biogas slurry pretreatment method |
-
2017
- 2017-09-28 CN CN201710897771.9A patent/CN107686192A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07124571A (en) * | 1993-11-04 | 1995-05-16 | Ngk Insulators Ltd | Treatment process for organic drainage |
| CN103449584A (en) * | 2013-08-28 | 2013-12-18 | 大连东泰产业废弃物处理有限公司 | Ammonia-nitrogen wastewater treatment method |
| CN103466841A (en) * | 2013-09-27 | 2013-12-25 | 中南大学 | Ammonia-nitrogen wastewater treatment method |
| CN103936192A (en) * | 2014-04-02 | 2014-07-23 | 化工部长沙设计研究院 | High-concentration ammonia-nitrogen wastewater treatment process |
| CN105236668A (en) * | 2015-07-14 | 2016-01-13 | 南昌大学 | Magnesium hydrogen phosphate-assisted biological deamination biogas slurry pretreatment method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110746038A (en) * | 2019-10-11 | 2020-02-04 | 浙江先创能源科技股份有限公司 | Method for treating aquaculture water |
| CN113045022A (en) * | 2021-04-21 | 2021-06-29 | 新地环保技术有限公司 | Supercritical water oxidation treatment phosphorus-containing waste and phosphorus recovery method |
| CN113045022B (en) * | 2021-04-21 | 2022-11-15 | 新地环保技术有限公司 | Supercritical water oxidation treatment phosphorus-containing waste and phosphorus recovery method |
| CN115806373A (en) * | 2023-02-06 | 2023-03-17 | 山东泰和科技股份有限公司 | Treatment method of iron phosphate production wastewater |
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