CN110255784A - A kind of synchronous method for removing nitrogen phosphorus in Pig raising wastewater - Google Patents
A kind of synchronous method for removing nitrogen phosphorus in Pig raising wastewater Download PDFInfo
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- CN110255784A CN110255784A CN201910209526.3A CN201910209526A CN110255784A CN 110255784 A CN110255784 A CN 110255784A CN 201910209526 A CN201910209526 A CN 201910209526A CN 110255784 A CN110255784 A CN 110255784A
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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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
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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
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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
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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
- C02F2001/5218—Crystallization
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
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Abstract
The present invention relates to a kind of methods of nitrogen phosphorus in synchronous removal Pig raising wastewater.Described method includes following steps: sodium chloride and natural ore powder being added into Pig raising wastewater, stands after stirring electrolytic sodium chloride to get the supernatant and solidliquid mixture of denitrification phosphorus is removed；The mass concentration of sodium chloride is not less than 2g/L in the Pig raising wastewater；The mass concentration of natural ore powder is not less than 10g/L in the Pig raising wastewater.Method provided by the invention achievees the purpose that nitrogen, phosphorus in synchronous removal waste water using electrolytic oxidation and chemicrystallization coupling technique, and removal efficiency is high, removal effect is good, the removal rate of ammonia nitrogen can achieve 99% or more, and the removal rate of phosphorus can achieve 88.7% or more, can reach discharge standard.In addition, method provided by the invention is easy to operate, adjusted without pH repeatedly, without being strictly added medicament by dosages distribution, and it is raw materials used cheap and be easier to obtain, cost for wastewater treatment is low.
Description
Technical field
The invention belongs to environmental technology fields, and in particular to a kind of synchronous method for removing nitrogen phosphorus in Pig raising wastewater.
Background technique
Since a large amount of industry, agricultural and sanitary wastewater are discharged into water body, China's water environment is facing huge challenge.It is same with this
When, water pollution and its brought endanger exacerbate the anxiety of water resource, constitute and seriously threaten to people's lives.Therefore,
Studying efficiently feasible water treatment technology seems especially urgent.
It is well known that nitrogen and phosphorus pollution object is largely discharged into the eutrophication that water body is easily caused in river, lake, cause water body
Middle algal bloom, content of oxygen dissolved in water sharply decline, and influence the existence of aquatile.For this purpose, China " integrated wastewater row
Put standard " strict regulations are made that the concentration of emission of the pollutants such as nitrogen, phosphorus, nitrogen, phosphorus are discharged in many opposite river basins in place
Pollutant is even more to propose more qualification.
Therefore, raise pigs discharge wastewater flow rate it is big, the pollutants such as Coal Gas Washing Cycling Water nitrogen, phosphorus cannot be effectively treated for a long time,
So that the discharge of Pig raising wastewater becomes the important sources of rivers, lake pollution.In addition, the pollutants such as a large amount of nitrogen, phosphorus are from earth's surface
Runoff penetrates into underground water from soil, leads to underground water pollution.Therefore, how efficiently to Pig raising wastewater at
Reason, reduces the discharge of nitrogen and phosphorus pollution, is the important directions that Pig raising wastewater is administered.
Currently, the method for nitrogen in industrial processing waste water, phosphorus is mainly bioanalysis and chemical method.Bio-denitrification technology has A/
O、A2/ O, SBR, oxidation ditch etc. realize the decomposition and inversion process of nitrogen, but in nitrification, anti-nitre by obtaining energy from organic matter
During change, stringent limitation of the biological treatment by a variety of conditions such as pH, temperature, carbon source, dissolved oxygen is tight because needing in hereat applying
Lattice control reaction condition just can guarantee the stable operation of system.Biological phosphate-eliminating technology is mainly by the anaerobism of polyP bacteria, aerobic
State stores phosphorus in vivo in the form of polymeric form, then removes from system in form of a sludge.The process is to anaerobism, aerobic
State has strict requirements, and the subsequent processing of phosphorus is also one of problem to be solved in sludge.Chemical method denitrogenation technology master
There are break point chlorination method, air stripping method, absorption method etc..Break point chlorination method needs to add a large amount of chlorine, and can generate in the process
The substance being largely harmful to the human body；Air stripping method is generally used for the processing of high-concentration ammonia nitrogenous wastewater, to the temperature of environment have compared with
High requirement；Absorption method generally uses zeolite etc. as adsorbent, is generally used for processing Low Concentration Ammonia Containing Wastewater, in reaction process
A large amount of sludge can be generated, effect is bad in practical applications.Chemical method dephosphorization technique is mainly by adding flocculation into waste water
Agent makes itself and the phosphate reaction in water, generates precipitating, and reaction needs to add a large amount of chemical agent, and processing cost is higher.?
In industrial application, traditional denitrification and dephosphorization method has been difficult to meet actual requirement.Electrolysis method has efficient, equipment letter because of it
Singly, the advantages that processing cost is lower, obtains more and more extensive concern in practical applications.
The pollutants such as nitrogen, phosphorus in Pig raising wastewater containing high concentration, only with traditional electrolysis method, treatment effeciency compares
It is low, and removal effect does not reach requirement the standard of discharge.Therefore, it is feeding in electrolytic process to improve to develop a kind of new electrolytic method
The removal efficiency of nitrogen and phosphorus pollution object has important research significance and environmentally friendly application value in pig waste water.
Summary of the invention
It is an object of the invention to overcoming the removal efficiency of existing electrolysis method processing Pig raising wastewater nitrogen and phosphorus pollution object not high and
The defect and deficiency of discharge standard is not achieved, a kind of synchronous method for removing nitrogen phosphorus in Pig raising wastewater is provided.It is provided by the invention
Method achievees the purpose that nitrogen, phosphorus in synchronous removal waste water using electrolytic oxidation and chemicrystallization coupling technique, and removal efficiency is high,
Removal effect is good, and the removal rate of ammonia nitrogen can achieve 99% or more, and the removal rate of phosphorus can achieve 88.7% or more, can reach
Discharge standard.In addition, method provided by the invention is easy to operate, adjusted without pH repeatedly, without strictly by dosages distribution
Medicament is added, and raw materials used cheap and be easier to obtain, cost for wastewater treatment is low.
For achieving the above object, the present invention adopts the following technical scheme:
A kind of synchronous method for removing nitrogen phosphorus in Pig raising wastewater, includes the following steps: that sodium chloride is added into Pig raising wastewater
And natural ore powder, it stands after stirring electrolytic sodium chloride to get the supernatant and solidliquid mixture of denitrification phosphorus is removed；The pig raising is useless
The mass concentration of villaumite is not less than 2g/L in water；The mass concentration of natural ore powder is not less than 10g/L in the Pig raising wastewater.
In electrolytic process, following reaction occurs:
Anode: 2Cl––2e–→Cl2↑
Cathode: 2H++2e–→H2↑
The Cl released2There is extremely strong oxidisability, it can be by the ammonium oxidation in waste water at N2Removal, while acid is generated, make
Obtain the pH value decline of Solutions Solution.
Natural ore powder in water solution system, main component are CaCO3(certain further includes MgCO3), the acid of generation can be with
So that the Ca in natural ore powder2+、Mg2+It is dissolved out, dissolves Ca out2+、Mg2+It can generate and precipitate with the phosphate in waste water
To achieve the purpose that dephosphorization.
To realize, the synchronous of nitrogen phosphorus removes the amount of amount and natural ore powder that the present invention is electrolysed by control in Pig raising wastewater,
Removal efficiency is high, and removal effect is good, and the removal rate of ammonia nitrogen can achieve 99% or more, and the removal rate of phosphorus can achieve 88.7%
Or more, it can reach discharge standard.In addition, method provided by the invention is easy to operate, adjusted without pH repeatedly, without tight
Medicament is added by dosages distribution in lattice, and raw materials used cheap and be easier to obtain, and cost for wastewater treatment is low.
Electrolytic process in the present invention is conventional electrolytic process, and power supply, electrode, the selection of voltage can be according to conventional strip
Part carries out.
Preferably, the process of the electrolysis is to utilize DC power supply electrolysis electrode.
It is further preferable that the electrode anode and Electrode Negative are inert electrode.
The inert electrode of this field routine is used equally in the present invention, such as platinum electrode, gold electrode, carbon electrode etc..
Preferably, the inert electrode is graphite electrode.
Preferably, the voltage of the electrolysis is 20~30V.
Preferably, the time of the electrolysis is 150~250min.
It is electrolysed the Cl of generation under this condition2Amount can realize as far as possible the oxidation of ammonia nitrogen in the case where save the cost.
Preferably, the time of the standing is 60~120min.
Preferably, the mass concentration of villaumite is 2~10g/L in the Pig raising wastewater.
Preferably, the villaumite is one or more of sodium chloride or potassium chloride.
Preferably, the mass concentration of natural ore powder is 10~30g/L in the Pig raising wastewater.
Preferably, the natural ore powder is one or more of dolomite dust or agstone.
The main component of dolomite dust is CaCO3And MgCO3, the main component of agstone is CaCO3, it is possible to provide it is sufficient
Ca2+、Mg2+。
Under normal circumstances, the mass concentration of nitrogen is 200~1200mg/L in Pig raising wastewater, with NH4- N meter, the quality of phosphorus are dense
Degree is 20~150mg/L, with PO4- P meter is suitable for being handled using method of the invention.
Preferably, the mass concentration of nitrogen is 200~1200g/L in the Pig raising wastewater, with NH4- N meter；The pig raising is useless
The mass concentration of phosphorus is 20~150g/L in water, with PO4- P meter.
Compared with prior art, the invention has the following beneficial effects:
Method provided by the invention using electrolytic oxidation and chemicrystallization coupling technique, reach nitrogen in synchronous removal waste water,
The purpose of phosphorus, removal efficiency are high, and removal effect is good, and the removal rate of ammonia nitrogen can achieve 99% or more, and the removal rate of phosphorus can be with
Reach 88.7% or more, can reach discharge standard.In addition, method provided by the invention is easy to operate, without pH tune repeatedly
Section, without medicament strictly is added by dosages distribution, and it is raw materials used cheap and be easier to obtain, cost for wastewater treatment is low.
Detailed description of the invention
Fig. 1 is the device of the invention flow diagram；Wherein 1 is electrolysis reactor, and 2 be solid-liquid discharge outlet, and 3 be stirring
Device, 4 be DC power supply, and 5 be discharge of wastewater mouth, and 6 be electrolysis electrode.
Specific embodiment
Below with reference to embodiment, the present invention is further explained.These embodiments are merely to illustrate the present invention rather than limitation
The scope of the present invention.Test method without specific conditions in lower example embodiment usually according to this field normal condition or is pressed
The condition suggested according to manufacturer；Used raw material, reagent etc., unless otherwise specified, being can be from the business such as conventional market
The raw materials and reagents that approach obtains.The variation for any unsubstantiality that those skilled in the art is done on the basis of the present invention
And replacement belongs to scope of the present invention.
Embodiment 1
The present embodiment provides a kind of methods of nitrogen phosphorus in synchronous removal Pig raising wastewater, at device shown in FIG. 1
Reason, concrete operations are as follows.
1m is added in electrolysis reactor 1 first3Ammonia nitrogen and phosphorus concentration are respectively that the pig raising of 523mg/L and 90mg/L is useless
Then water is added dolomite dust by 10g/L, then sodium chloride is added by 2g/L, start blender, being also turned on DC power supply 4 is
Electrolysis electrode 6 (graphite electrode, similarly hereinafter) power supply, the control of stirring electrolysis time is in 150min, and decomposition voltage control is in 20V, reaction
Blender 3 and DC power supply 4, solution left standstill 60min are closed after the completion, and supernatant is discharged from discharge of wastewater mouth 5, solidliquid mixture
It is discharged from solid-liquid discharge outlet 2.
By aforesaid operations step, the ammonia nitrogen concentration in Pig raising wastewater is reduced to 5mg/L, and ammonia nitrogen removal frank 99%, phosphorus is dense
Degree is reduced to 10mg/L, phosphorous recovery 88.7%.
Embodiment 2
The present embodiment provides a kind of method of nitrogen phosphorus in synchronous removal Pig raising wastewater, concrete operations are as follows.
1m is added in electrolysis reactor 1 first3Ammonia nitrogen and phosphorus concentration are respectively that the pig raising of 523mg/L and 90mg/L is useless
Then water is added agstone by 20g/L, then sodium chloride is added by 8g/L, start blender 3, be also turned on DC power supply 4
For the power supply of electrolysis electrode 6, the control of stirring electrolysis time closes stirring in 25V in 200min, decomposition voltage control after the reaction was completed
Device 3 and DC power supply 4, solution left standstill 100min, supernatant are discharged from discharge of wastewater mouth 5, and solidliquid mixture is from solid-liquid discharge outlet 2
Discharge.
By aforesaid operations step, the ammonia nitrogen concentration in Pig raising wastewater is reduced to 4mg/L, ammonia nitrogen removal frank 99.3%, phosphorus
Concentration is reduced to 8mg/L, phosphorous recovery 91.1%.
Embodiment 3
The present embodiment provides a kind of method of nitrogen phosphorus in synchronous removal Pig raising wastewater, concrete operations are as follows.
1m is added in electrolysis reactor 1 first3Ammonia nitrogen and phosphorus concentration are respectively that the pig raising of 523mg/L and 90mg/L is useless
Then water is added dolomite dust and agstone mixture (mass ratio 1:1) by 30g/L, then sodium chloride is added by 10g/L,
Start blender 3, is also turned on DC power supply 4 as the power supply of electrolysis electrode 6, the control of stirring electrolysis time is in 250min, electrolysis electricity
Voltage-controlled system closes blender 3 and DC power supply 4 in 30V after the reaction was completed, solution left standstill 120min, and supernatant is from discharge of wastewater
Mouth 5 discharges, and solidliquid mixture is discharged from solid-liquid discharge outlet 2.
By aforesaid operations step, the ammonia nitrogen concentration in Pig raising wastewater is reduced to 2mg/L, ammonia nitrogen removal frank 99.6%, phosphorus
Concentration is reduced to 5mg/L, phosphorous recovery 94.4%.
Those of ordinary skill in the art will understand that embodiment here be to help reader understand it is of the invention
Principle, it should be understood that protection scope of the present invention is not limited to such specific embodiments and embodiments.This field it is common
Technical staff disclosed the technical disclosures can make the various various other tools for not departing from essence of the invention according to the present invention
Body variations and combinations, these variations and combinations are still within the scope of the present invention.
Claims (9)
1. a kind of method of nitrogen phosphorus in synchronous removal Pig raising wastewater, which comprises the steps of: add into Pig raising wastewater
Enter villaumite and natural ore powder, is stood after stirring electrolysis to get the supernatant and solidliquid mixture of denitrification phosphorus is removed；The pig raising is useless
The mass concentration of villaumite is not less than 2g/L in water；The mass concentration of natural ore powder is not less than 10g/L in the Pig raising wastewater.
2. method according to claim 1, which is characterized in that the process of the electrolysis is to utilize DC power supply electrolysis electrode.
3. method according to claim 2, which is characterized in that the electrode anode and Electrode Negative are inert electrode.
4. method according to claim 1, which is characterized in that the voltage of the electrolysis is 20~30V；The time of the electrolysis
For 150~250min.
5. method according to claim 1, which is characterized in that the time of the standing is 60~120min.
6. method according to claim 1, which is characterized in that the mass concentration of villaumite is 2~10g/ in the Pig raising wastewater
L。
7. method according to claim 1, which is characterized in that the villaumite is one of sodium chloride or potassium chloride or several
Kind.
8. method according to claim 1, which is characterized in that the mass concentration of natural ore powder is 10 in the Pig raising wastewater
~30g/L.
9. method according to claim 1, which is characterized in that the natural ore powder is in dolomite dust or agstone
It is one or more of.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111847602A (en) * | 2020-06-12 | 2020-10-30 | 中国科学院生态环境研究中心 | Method for removing phosphorus by electrochemically regulating calcareous mineral material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105110523A (en) * | 2015-09-11 | 2015-12-02 | 燕山大学 | Method for treating swine wastewater |
| CN108977823A (en) * | 2018-08-30 | 2018-12-11 | 湖北美辰环保科技有限公司 | A kind of nitrogen phosphorus fluorine recovery method based on electrochemical reactor |
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- 2019-03-19 CN CN201910209526.3A patent/CN110255784B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105110523A (en) * | 2015-09-11 | 2015-12-02 | 燕山大学 | Method for treating swine wastewater |
| CN108977823A (en) * | 2018-08-30 | 2018-12-11 | 湖北美辰环保科技有限公司 | A kind of nitrogen phosphorus fluorine recovery method based on electrochemical reactor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111847602A (en) * | 2020-06-12 | 2020-10-30 | 中国科学院生态环境研究中心 | Method for removing phosphorus by electrochemically regulating calcareous mineral material |
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