CN109052849A - Nitrogen phosphorus biochemical processing method in a kind of sewage - Google Patents
Nitrogen phosphorus biochemical processing method in a kind of sewage Download PDFInfo
- Publication number
- CN109052849A CN109052849A CN201811018034.8A CN201811018034A CN109052849A CN 109052849 A CN109052849 A CN 109052849A CN 201811018034 A CN201811018034 A CN 201811018034A CN 109052849 A CN109052849 A CN 109052849A
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- China
- Prior art keywords
- sewage
- sludge
- flow system
- section
- composite drug
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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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
- C02F1/5254—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using magnesium compounds and phosphoric acid for removing 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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- 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
Abstract
The invention discloses nitrogen phosphorus biochemical processing method in a kind of sewage, include the following steps: that sewage, which is passed through pretreatment pool, first carries out preliminary treatment；Biochemical reaction tank will be then passed through by pretreated sewage, biochemical reaction tank includes anaerobism section and aerobic section, and nitrobacteria and polyP bacteria are contained in the sludge of aerobic section, contains polyP bacteria in the sludge of anaerobism section, contains denitrifying bacterium in the sludge of anoxic section；The interior return-flow system of biochemical reaction tank flows back for nitrification liquid, the phosphorus crystallization pond a is provided in return-flow system, and in interior return-flow system addition composite drug for promoting phosphate crystal to be precipitated.By the addition of composite drug, the contradiction during biological carbon and phosphorous removal, efficient dephosphorization are eliminated；For the removal effect of different Effluent criterias, reaction rate of the control composite drug in sewage, save the cost can be passed through；Meanwhile assistant medicament can be added, further intensified denitrification and dephosphorization effect.
Description
Technical field
The present invention relates to technical field of sewage, and in particular to nitrogen phosphorus biochemical processing method in a kind of sewage.
Background technique
With the policy of national water treatment field and the dual guide in market, waste water control, which integrally mentions mark and has become sewage, to be controlled
One of the focus point of industry is managed, many big-and-middle Sewage Disposals carry out proposing mark transformation, and a large amount of villages and small towns small-scale sewages occur
Treating stations, wastewater treatment in China amount, discharge standard reach unprecedented height.But also gradually occur during proposing mark transformation
Some problems, such as: effluent quality index is unstable, and removal efficiency of nitrogen and phosphorus is difficult to improve again.
In aerobic section in sewage disposal process, nitrobacteria by the sewage that becomes a mandarin ammonia nitrogen and organic nitrogen ammonification at ammonia
Nitrogen is acted on by biological nitration, is converted to nitrate；In anoxic section, denitrifying bacteria passes through the interior nitrate brought into that flows back
Biological denitrification is converted to nitrogen and escapes into atmosphere, to achieve the purpose that denitrogenation；In anaerobism section, polyP bacteria discharges phosphorus,
And the degradable organic matter such as absorb lower aliphatic；And in aerobic section, polyP bacteria excess absorbs phosphorus, and the row for passing through excess sludge
It puts, by phosphorus ligands.
By analyzing above, sewage disposal process is that biochemical reaction carries out denitrogenation, and longer sludge age can achieve preferably
Denitrification effect；And the removal of phosphorus is carried out by spoil disposal process in sewage treatment, shorter sludge age can achieve preferably
Phosphor-removing effect.By many years technology develop, the existing sewage disposal system in market, for biological carbon and phosphorous removal removal rate
It is higher, but also be difficult to improve again, it can not meet higher draining water quality requirement.
Summary of the invention
It is difficult the technical problem to be solved by the present invention is to solve the contradiction of sludge age and removal rate during biological carbon and phosphorous removal
The problem of improving again further increases removal efficiency of nitrogen and phosphorus.
In order to solve the above-mentioned technical problem, a kind of the technical solution adopted by the present invention are as follows: nitrogen phosphorus biochemical treatment side in sewage
Method includes the following steps: that sewage, which is passed through pretreatment pool, first carries out preliminary treatment；It will then lead to by pretreated sewage
Enter biochemical reaction tank, biochemical reaction tank includes anaerobism section and aerobic section, contains nitrobacteria and poly- phosphorus in the sludge of aerobic section
Bacterium contains polyP bacteria in the sludge of anaerobism section, contains denitrifying bacterium in the sludge of anoxic section；The interior return-flow system of biochemical reaction tank
It flows back for nitrification liquid, the phosphorus crystallization pond a is provided in return-flow system, and in interior return-flow system addition composite drug for promoting
It is precipitated into phosphate crystal.
Further, in the composite drug component include activated magnesia and magnesium chloride, the two molar ratio be 4.5~
5.5: 0.8~1.2.
It further, further include sodium acetate, activated magnesia, magnesium chloride and the ratio of sodium acetate three in composite drug component
Example is 4.5~5.5: 0.8~1.2: 1.5~2.5.
Further, biochemical reaction tank connects secondary settling tank, and secondary settling tank passes through the amount of activated sludge of exteenal reflux system flowback extremely
Biological reaction pool also has phosphorus to crystallize the pond b in outer return-flow system, is also added with composite drug for promoting phosphorus in outer return-flow system
Hydrochlorate crystallization.
Further, the form of the composite drug can be particle, lenticular or threadiness.
From above-mentioned technical proposal biological denitrificaion can be eliminated with the invention has the following advantages that by the addition of composite drug
Contradiction during dephosphorization, efficient dephosphorization；It, can be by control composite drug in sewage for the removal effect of different Effluent criterias
In reaction rate, save the cost；Meanwhile assistant medicament can be added, further intensified denitrification and dephosphorization effect.
Detailed description of the invention
Fig. 1 is process flow chart of the invention
Specific embodiment
A specific embodiment of the invention is illustrated below in conjunction with attached drawing.
As shown in Figure 1, the processing that nitrogen phosphorus biochemical processing method uses in sewage of the invention include pretreatment pool, it is biochemical anti-
Ying Chi, secondary settling tank, the phosphorus crystallization pond a and phosphorus crystallize the pond b.
Treatment process includes the following steps, sewage will be passed through to pretreatment pool first and carry out preliminary treatment；To then it pass through
Pretreated sewage is passed through biochemical reaction tank, and biochemical reaction tank includes anaerobism section and aerobic section, contains in the sludge of aerobic section
Contain polyP bacteria in the sludge of nitrobacteria and polyP bacteria anaerobism section, contains denitrifying bacterium in the sludge of anoxic section；It is biochemical anti-
The interior return-flow system of Ying Chi flows back for nitrification liquid, the phosphorus crystallization pond a is provided in return-flow system, and add in interior return-flow system
Add composite drug for promoting phosphate crystal to be precipitated, wherein stating in composite drug component comprising magnesia, magnesium chloride and vinegar
Sour sodium, three's molar ratio are 4.5~5.5: 0.8~1.2: 1.5~2.5, and sodium acetate improves grain boundary week as assistant medicament
Water phase basicity is enclosed, is conducive to improve biological denitrificaion rate；Biochemical reaction tank connects secondary settling tank, and secondary settling tank is returned by exteenal reflux system
Stream part activated sludge also has phosphorus to crystallize the pond b in outer return-flow system, is also added in outer return-flow system multiple to biological reaction pool
Medicament is closed for promoting phosphate crystal.Wherein the form of composite drug can be particle, lenticular or threadiness.
Ksp index of the magnesium particle in conjunction with phosphate is up to 10-30The order of magnitude.
Crystallization equilibrium equation of the magnesium ion in conjunction with phosphate:
Mg2++PO4 3-=Mg3(PO4)2
To above-mentioned equilibrium equation crystallization equilibrium constant:
Ksp[Mg3(PO4)2]=[Mg2+]3·[PO4 3-]2
Experimentation is measured using physicochemical analysis method:
At T=20 DEG C, Ksp [Mg3(PO4)2]=4.2 × 10-30mol·L-1。
By the above experimental data it is found that at 20 DEG C, composite drug and phosphoric acid are normal with the crystallization equilibrium of ionic reaction process
Number Ksp [Mg3(PO4)2]=4.2 × 10-30mol·L-1, reach 10-30The order of magnitude.For above-mentioned reaction, when composite drug is thrown
It adds in sewage, forms supersaturated solution, only need minute quantity composite drug, so that it may form phosphorus crystallization, be removed from sewage a large amount of
Phosphorus.Magnesia is active, reacts slower with water, meets phosphate radical sustained release, gradually forms magnesium ion, meanwhile, add adjuvant
Agent D is not only conducive to dephosphorization, but also improves water phase basicity around grain boundary, is conducive to improve biological denitrificaion rate.
Interior reflux is nitrification liquid reflux, and ammonia nitrogen is converted into nitrate anion, nitrite anions in aerobic tank, flows back into anoxic pond conversion
For nitrogen N 2, ammonia nitrogen is removed, water phase basicity can be improved in auxiliary reagent, conducive to denitrogenating.Exteenal reflux, that is, sludge reflux, refluxing portion
Sludge guarantees system sludge concentration, and spoil disposal is leaned in dephosphorization, and with regard to low, efficiencies of nitrogen removal reduces the too many system sludge concentration of spoil disposal again.Phosphorus
Crystallization can more phosphorus be deposited in sludge, and a large amount of phosphorus can be removed by arranging a small amount of mud.In addition, phosphorus crystallizing agent will not be right
Sewerage has an impact, traditional medicament, and molysite/aluminium salt dosage is big, while can generate flocculating result, increases sludge quantity.
Following table is practical application effect of the invention.
By the addition of composite drug, the contradiction during biological carbon and phosphorous removal, efficient dephosphorization are eliminated；For different water outlets
The removal effect of standard can pass through reaction rate of the control composite drug in sewage, save the cost；Meanwhile it can be added auxiliary
Help medicament, further intensified denitrification and dephosphorization effect；System stability and high efficiency, it is easy to operate；System stable water outlet reaches national " city
Town sewage plant pollutant emission standard " level-one A standard in (GB18918-2002).
Claims (5)
1. nitrogen phosphorus biochemical processing method, includes the following steps: in a kind of sewage
Sewage is passed through pretreatment pool first and carries out preliminary treatment；
Then biochemical reaction tank will be passed through by pretreated sewage, biochemical reaction tank includes anaerobism section, anoxic section and aerobic
Section, nitrobacteria and polyP bacteria are contained in the sludge of aerobic section, contains polyP bacteria, the sludge of anoxic section in the sludge of anaerobism section
In contain denitrifying bacterium；
The interior return-flow system of biochemical reaction tank flows back for nitrification liquid, the phosphorus crystallization pond a is provided in return-flow system, and inside
Return-flow system addition composite drug is for promoting phosphate crystal to be precipitated.
2. nitrogen phosphorus biochemical processing method in sewage according to claim 1, it is characterised in that: in the composite drug component
Comprising activated magnesia and magnesium chloride, the two molar ratio is 4.5~5.5: 0.8~1.2.
3. nitrogen phosphorus biochemical processing method in sewage according to claim 2, it is characterised in that: also wrapped in composite drug component
Sodium acetate is included, the ratio of activated magnesia, magnesium chloride and sodium acetate three is 4.5~5.5: 0.8~1.2: 1.5~2.5.
4. nitrogen phosphorus biochemical processing method in sewage according to claim 3, it is characterised in that: biochemical reaction tank connection two is heavy
Pond, secondary settling tank also have phosphorus to crystallize b by the amount of activated sludge of exteenal reflux system flowback to biological reaction pool in outer return-flow system
Pond is also added with composite drug for promoting phosphate crystal in outer return-flow system.
5. nitrogen phosphorus biochemical processing method in sewage according to claim 4, it is characterised in that: the form of the composite drug
It can be particle, lenticular or threadiness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811018034.8A CN109052849A (en) | 2018-09-03 | 2018-09-03 | Nitrogen phosphorus biochemical processing method in a kind of sewage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811018034.8A CN109052849A (en) | 2018-09-03 | 2018-09-03 | Nitrogen phosphorus biochemical processing method in a kind of sewage |
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| Publication Number | Publication Date |
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| CN109052849A true CN109052849A (en) | 2018-12-21 |
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| CN201811018034.8A Pending CN109052849A (en) | 2018-09-03 | 2018-09-03 | Nitrogen phosphorus biochemical processing method in a kind of sewage |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103739169A (en) * | 2014-01-21 | 2014-04-23 | 中冶华天工程技术有限公司 | Nitrogen and phosphorus removal method for biological sewage treatment |
| CN204211607U (en) * | 2014-10-30 | 2015-03-18 | 黑龙江国中水务股份有限公司 | A kind of Sewage treatment systems of recyclable crystallization phosphorus |
| CN107216005A (en) * | 2017-07-28 | 2017-09-29 | 湖南科技大学 | The sewage-treatment plant and process of a kind of enhanced biological nitrogen removal chemical dephosphorization |
| CN206828307U (en) * | 2017-04-12 | 2018-01-02 | 江苏贞一环保科技有限公司 | A kind of sewage water intensification denitrification dephosphorization apparatus |
-
2018
- 2018-09-03 CN CN201811018034.8A patent/CN109052849A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103739169A (en) * | 2014-01-21 | 2014-04-23 | 中冶华天工程技术有限公司 | Nitrogen and phosphorus removal method for biological sewage treatment |
| CN204211607U (en) * | 2014-10-30 | 2015-03-18 | 黑龙江国中水务股份有限公司 | A kind of Sewage treatment systems of recyclable crystallization phosphorus |
| CN206828307U (en) * | 2017-04-12 | 2018-01-02 | 江苏贞一环保科技有限公司 | A kind of sewage water intensification denitrification dephosphorization apparatus |
| CN107216005A (en) * | 2017-07-28 | 2017-09-29 | 湖南科技大学 | The sewage-treatment plant and process of a kind of enhanced biological nitrogen removal chemical dephosphorization |
Non-Patent Citations (1)
| Title |
|---|
| 陈寿椿: "《重要无机化学反应》", 31 December 1982 * |
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