CN105836884B - Denitrification dephosphorization removes N2The device and method of O - Google Patents
Denitrification dephosphorization removes N2The device and method of O Download PDFInfo
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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
- C02F3/308—Biological phosphorus removal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/84—Biological processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/402—Dinitrogen oxide
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/163—Nitrates
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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
- C02F2101/30—Organic 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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/34—N2O
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/10—Capture or disposal of greenhouse gases of nitrous oxide (N2O)
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Abstract
Denitrification dephosphorization removes N2The device and method of O, belong to sewage treatment and environmental protection technical field.Device includes: municipal sewage raw water box, denitrification dephosphorization SBR, magnetic stirring apparatus, N2O microelectrode, N2O on-line monitoring system, municipal sewage water tank.Method is that municipal sewage enters denitrification dephosphorization SBR, carries out anaerobism and stirs 1~2h, sufficiently release phosphorus, while the COD in sewage is stored as PHA, N then is added into denitrification dephosphorization SBR2O solution, with N2O carries out 2~3h of anoxia stirring as the electron acceptor of denitrification dephosphorization.It is drained after 30~45min of precipitating, is drained into water tank.Denitrification dephosphorization SBR needs spoil disposal on time, and reactor sludge concentration is made to maintain 2500~4000mg/L, SRT 16d.It is of the invention economical, simple, efficiently remove N2O, while the COD in sewage and P is eliminated, with N2O replaces the electron acceptor of conventional denitrification dephosphorization, obtains electron acceptor without being aerated, saves energy consumption.
Description
Technical field
The present invention relates to denitrification dephosphorizations to remove N2The device and method of O, belong to sewage treatment and environmental protection technology is led
Domain.
Background technique
Nitrous oxide (N2It O is) that Kyoto Protocol regulation includes carbon dioxide (CO2), methane (CH4), hydrofluorocarbons
(HFCs), six kinds of greenhouse gases including perfluorinated hydrocarbon (PFCs) and sulfur hexafluoride (SF6) (greenhouse gases,
One of GHGs).N2O measures presence in an atmosphere, but it is CO that it, which heats potentiality,2298 times.N relevant to mankind's activity2O release
Source property can be divided into chemistry and biological two big processes.N in chemical process2O source of release is by oxidizing fire, incineration, industrial production
It is formed with atmospheric sedimentation etc..The N discharged in bioprocess2O mostlys come from cultivated soil, marine microorganism, compost storage pool
And the treatment process of nitrogenous waste and waste water.Wherein nitrogenous effluent includes municipal sewage, landfill leachate and industrial wastewater
Deng.Currently, N2O has had reached 5~6% to the contribution of global atmosphere greenhouse effects.Therefore, gradually increase in Global Greenhouse Effect
Strong today, how to effectively control with removal N2O is at the problem studied.
In the current research about N2O removal, mainly there is N2The direct catalytic decomposing method of O.Refer at high temperature,
Using NiO, Fe2O3、Al2O3、CuO、MoO3Etc. one such or Multimetal oxide catalyst, or carry one kind or more of iron
Directly following reaction: 2N can be occurred for N2O catalysis by kind zeolite catalyst2O→2N2+O2.This method does not introduce impurity, no because of it
Generate the processing method that secondary pollution is considered as the prospect that has much.But it requires high temperature and catalyst, high expensive.
In saprobia denitrifying phosphorus removal technique, with nitrate (NO3 -) it is that electron acceptor carries out Denitrifying Phosphorus Removal
In, nitrate (NO3 -) it is reduced to nitrite (NO first2 -), then nitrite (NO2 -) it is reduced to nitric oxide
(NO), nitric oxide (NO) is further reduced to nitrous oxide (N later2O), last nitrous oxide (N2O) it is reduced to nitrogen
(N2).It can be found that N in this reduction process2Intermediate product of the O as denitrification dephosphorization, while can also be used as denitrification
The electron acceptor of dephosphorization, by N2O is reduced to N2Bacterium be Nos, this is just N2The removal of O provides new thinking.
Denitrification dephosphorization removes N2While O, while the COD in sewage and P is had also been removed, is killing three birds with one stone.It should
Method is easy to operate, at low cost, is that one kind is opened one's minds without secondary pollution.Current research does not have denitrification dephosphorization also
Technique is used to remove N2O, therefore application prospect is very wide.
Summary of the invention
The purpose of the present invention is to greenhouse gases N2The removal of O proposes that denitrification dephosphorization removes N2The device of O and side
Method.By water process in conjunction with Air Pollution Control, N is realized2Global Greenhouse Effect is alleviated in the removal of O, while also removing in sewage
COD and P.Both traditional N had been saved2The catalyst and heating expense of O removal process, but saving conventional denitrification dephosphorization is to obtain
The aeration expense for obtaining electron acceptor and needing.Process operation process is simple, and does not generate secondary pollution, is a kind of economic and environment-friendly
Type mode.
The purpose of the present invention is by the following technical programs to solve: denitrification dephosphorization removes N2The device of O, feature
It is, including municipal sewage raw water box (1), denitrification dephosphorization SBR (2), magnetic stirring apparatus (3), N2O microelectrode (4), N2O is online
Monitoring system (5), municipal sewage water tank (6)；Municipal sewage raw water box (1) passes through intake pump (1.1) and denitrification dephosphorization
SBR (2) is connected；Denitrification dephosphorization SBR (2) passes through N2O microelectrode (4) and N2O on-line monitoring system (5) connection；Denitrification
Dephosphorization SBR (2) is connect by drain valve (2.5) with municipal sewage water tank (6).
The denitrification dephosphorization SBR (2) is equipped with inlet valve (2.1) plus N2O solution injector (2.2), takes airbag (2.3)
Sample syringe (2.4), drain valve (2.5), mud valve (2.6).
N2The process flow of O and municipal sewage in this device are as follows: municipal sewage enters municipal sewage raw water box, passes through
Intake pump enters denitrification dephosphorization SBR, stirs 1~2h by magnetic stirring apparatus anaerobism, sufficiently releases phosphorus, while the COD in sewage
It is stored as internal carbon source PHA；Subsequent N2O solution is by adding N2O solution injector is added into denitrification dephosphorization SBR, with N2O conduct
The electron acceptor of denitrification dephosphorization carries out 2~3h of anoxia stirring, while passing through N2O microelectrode) and N2The monitoring of O on-line monitoring system
N in mixed liquor2O concentration；30~45min is precipitated, draining is drained into municipal sewage water tank than being 40~50%.Anti- nitre
Eliminating phosphorus SBR is closed system, is connected with the airbag of 1L at the top of it convenient for balanced reaction device external and internal pressure.
Denitrification dephosphorization removes N2The method of O, which comprises the following steps:
1) system starts:
By in traditional wastewater factory A2O process reflows sludge seeding to denitrification dephosphorization sbr reactor device, make sludge in reactor
Concentration reaches 2500~4000mg/L；
2) operation is adjusted when running:
Municipal sewage enters municipal sewage raw water box (1), enters denitrification dephosphorization SBR (2) by intake pump (1.1),
1~2h is stirred by magnetic stirring apparatus (3) anaerobism, sufficiently releases phosphorus, while the COD in sewage is stored as internal carbon source PHA；Then
N2O solution is by adding N2O solution injector (2.2) is added into denitrification dephosphorization SBR (2), while passing through N2O microelectrode (4) and
N2O on-line monitoring system (5) monitors N in mixed liquor2O concentration, with N2O carries out anoxic as the electron acceptor of denitrification dephosphorization and stirs
2~3h is mixed to N2O is removed completely, and in whipping process, magnetic stirring apparatus revolving speed is 150-200 r/min, need to will only be reacted
Solution is uniformly mixed in device, should not stir too fast, prevents N2O overflows；30~45min is precipitated, draining ratio is 40~50%,
It is drained into municipal sewage water tank (6).Denitrification dephosphorization SBR (2) is connected with airbag (2.3) at top convenient for balanced reaction device
External and internal pressure.Denitrification dephosphorization SBR needs spoil disposal on time, so that reactor sludge concentration is maintained 2500~4000mg/L, SRT is
16d。
Denitrification dephosphorization of the present invention removes N2The device and method of O, have the advantage that
1) compared to N2The conventional method that O is removed by high-temperature catalytic, denitrification dephosphorization remove N2The device and method of O without
Catalyst need to be heated and be added, cost is saved.
2) process operation is simple and easy to control, does not generate secondary pollution, belongs to environment amity technique.
3) traditional denitrification dephosphorization needs to obtain electron acceptor by aeration, and denitrification dephosphorization removes N2The device of O and
Method is with N2Electron acceptor of the O as denitrification dephosphorization, saves 100% aeration energy consumption, reduces sewage dephosphorization processing cost.
Detailed description of the invention
Fig. 1 is that denitrification dephosphorization of the present invention removes N2The apparatus structure schematic diagram of O.
1 it is municipal sewage raw water box in figure, 2 be denitrification dephosphorization SBR, 3 be magnetic stirring apparatus, 4 is N2O microelectrode, 5
For N2O on-line monitoring system, 6 are municipal sewage water tank；1.1 be intake pump；2.1 be inlet valve, 2.2 for plus N2O solution note
Emitter, 2.3 be airbag, 2.4 be sampling injector, 2.5 be drain valve, 2.6 be mud valve.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and examples: denitrification dephosphorization as shown in Figure 1 removes N2O's
Device includes municipal sewage raw water box (1), denitrification dephosphorization SBR (2), magnetic stirring apparatus (3), N2O microelectrode (4), N2O is online
Monitoring system (5), municipal sewage water tank (6)；Municipal sewage raw water box (1) passes through intake pump (1.1) and denitrification dephosphorization SBR
(2) it is connected；Denitrification dephosphorization SBR (2) passes through N2O microelectrode (4) and N2O on-line monitoring system (5) connection；Denitrification dephosphorization
SBR (2) is connect by drain valve (2.5) with municipal sewage water tank (6).
The denitrification dephosphorization SBR (2) is equipped with inlet valve (2.1) plus N2O solution injector (2.2), takes airbag (2.3)
Sample syringe (2.4), drain valve (2.5), mud valve (2.6).
Experiment uses Beijing university dependents' district sanitary sewage, N2O solution comes from N2O gas tank blasts the saturation N of water2O is molten
Liquid, concentration are 800~1000mgN2O-N/L is added 100~200mL and is saturated N2O solution makes mixed liquor N2O (in terms of N) concentration is
60~80mg/L, the specific water quality of sanitary sewage raw water are as follows: COD concentration is 120~260mg/L, NO2 -- N concentration < 0.1mg/L,
NO3 -- N concentration < 0.8mg/L, P concentration are 5~7mg/L, and pH is 7~8.Pilot system as shown in Figure 1, reactor using organic
Glass production, denitrification dephosphorization SBR dischargeable capacity is 2L, and draining ratio is 40~50%.
Specific implementation the following steps are included:
1) system starts:
By in traditional wastewater factory A2O process reflows sludge seeding to denitrification dephosphorization sbr reactor device, make sludge in reactor
Concentration reaches 3500mg/L；
2) operation is adjusted when running:
Municipal sewage enters municipal sewage raw water box (1), enters denitrification dephosphorization SBR (2) by intake pump (1.1),
1~2h is stirred by magnetic stirring apparatus (3) anaerobism, sufficiently releases phosphorus, while the COD in sewage is stored as internal carbon source PHA；Then
N2O solution is by adding N2O solution injector (2.2) is added into denitrification dephosphorization SBR (2), while passing through N2O microelectrode (4) and
N2O on-line monitoring system (5) monitors N in mixed liquor2O concentration, with N2O carries out anoxic as the electron acceptor of denitrification dephosphorization and stirs
2~3h is mixed to N2O is removed completely, and in whipping process, magnetic stirring apparatus revolving speed is 150-200 r/min, need to will only be reacted
Solution is uniformly mixed in device, should not stir too fast, prevents N2O overflows；30~45min is precipitated, draining ratio is 40~50%,
It is drained into municipal sewage water tank (6).Denitrification dephosphorization SBR (2) is connected with the airbag (2.3) of 1L at top convenient for balancing instead
Answer device external and internal pressure.Denitrification dephosphorization SBR needs spoil disposal on time, and reactor sludge concentration is made to maintain 2500~4000mg/L,
SRT is 16d.
Test result shows: after stable, denitrification dephosphorization sbr reactor device is discharged N2O concentration is 0~2mg/L, COD
Concentration is 35~40mg/L, NO2 -~N < 0.1mg/L, NO3 -~N < 0.5mg/L, P < 0.5mg/L.
It is specific embodiments of the present invention above, is better understood on and applies this convenient for the those skilled in the art
Invention, but implementation of the invention is without being limited thereto, therefore the simple modifications that the those skilled in the art are the present invention are all
Within that scope of the present invention.
Claims (1)
1. denitrification dephosphorization removes N2The method of O, equipment therefor include: municipal sewage raw water box (1), denitrification dephosphorization sbr reactor
Device (2), magnetic stirring apparatus (3), N2O microelectrode (4), N2O on-line monitoring system (5), municipal sewage water tank (6)；Municipal sewage
Raw water box (1) is connected by intake pump (1.1) with denitrification dephosphorization sbr reactor device (2), denitrification dephosphorization sbr reactor device (2)
Pass through N2O microelectrode (4) and N2O on-line monitoring system (5) connection, denitrification dephosphorization sbr reactor device (2) pass through drain valve (2.5)
It is connect with municipal sewage water tank (6)；
The denitrification dephosphorization sbr reactor device (2) is equipped with inlet valve (2.1) plus N2O solution injector (2.2), airbag (2.3),
Sampling injector (2.4), drain valve (2.5), mud valve (2.6)；
Characterized by comprising the following steps:
1) system starts:
By traditional wastewater factory A2In O process reflows sludge seeding to denitrification dephosphorization sbr reactor device, make sludge concentration in reactor
Reach 2500~4000mg/L；
2) operation is adjusted when running:
Municipal sewage enters municipal sewage raw water box (1), enters denitrification dephosphorization sbr reactor device by intake pump (1.1)
(2), 1~2h is stirred by magnetic stirring apparatus (3) anaerobism, while the COD in sewage is stored as internal carbon source PHA；Subsequent N2O solution
By adding N2O solution injector (2.2) is added into denitrification dephosphorization sbr reactor device (2), while passing through N2O microelectrode (4) and
N2O on-line monitoring system (5) monitors N in mixed liquor2O concentration, with N2O carries out anoxic as the electron acceptor of denitrification dephosphorization and stirs
2~3h is mixed to N2O is removed completely, and in whipping process, magnetic stirring apparatus revolving speed is 150-200r/min；Precipitating 30~
45min, draining are drained into municipal sewage water tank (6) than being 40~50%；Denitrification dephosphorization sbr reactor device (2) is pushing up
Portion is connected with airbag (2.3) convenient for balanced reaction device external and internal pressure；Denitrification dephosphorization SBR needs spoil disposal on time, makes reactor sludge
Concentration maintains 2500~4000mg/L, SRT 16d.
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| CN106927521A (en) * | 2017-03-31 | 2017-07-07 | 长乐巧通工业设计有限公司 | A kind of domestic sewage treating compound and preparation method thereof |
| CN109022269B (en) * | 2018-10-16 | 2023-08-04 | 广东石油化工学院 | Multichannel indoor denitrification culture device and culture method thereof |
| CN110180377A (en) * | 2019-05-15 | 2019-08-30 | 浙江万里学院 | A kind of exhaust gas purifying method and reactor of high efficiency synchronous desulphurization denitration |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5013441A (en) * | 1988-07-20 | 1991-05-07 | Goronszy Mervyn C | Biological nutrient removal with sludge bulking control in a batch activated sludge system |
| CN102849850A (en) * | 2012-07-29 | 2013-01-02 | 北京工业大学 | Reduction control device and method for N2O produced in denitrification dephosphorization process |
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- 2016-05-28 CN CN201610366127.4A patent/CN105836884B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5013441A (en) * | 1988-07-20 | 1991-05-07 | Goronszy Mervyn C | Biological nutrient removal with sludge bulking control in a batch activated sludge system |
| CN102849850A (en) * | 2012-07-29 | 2013-01-02 | 北京工业大学 | Reduction control device and method for N2O produced in denitrification dephosphorization process |
Non-Patent Citations (1)
| Title |
|---|
| 内源反硝化过程中N2O的产生特征;王传新 等;《北京工业大学学报》;20150831;第41卷(第8期);前言、第1.1节及图1 |
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