CN106430565B - It is a kind of directly converted based on carbon source, the sewage low consumption processing of nitrogen biological eliminating and energy recovery combined treatment process - Google Patents
It is a kind of directly converted based on carbon source, the sewage low consumption processing of nitrogen biological eliminating and energy recovery combined treatment process Download PDFInfo
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- C02F3/02—Aerobic processes
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- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
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Abstract
The present invention relates to it is a kind of directly converted based on carbon source, the sewage low consumption processing of nitrogen biological eliminating and energy recovery combined treatment process, belong to dirty (useless) water-treatment technology field.The device that the invented technology is related to mainly is made of anaerobic fermentation reaction zone, membrane separation zone, anoxic filter tank and aerobic filter tank.Municipal sewage carries out carbon source in anaerobic fermentation reaction zone after pretreatment and is converted into methane, realizes that energy recovery utilizes；It realizes and is separated by solid-liquid separation in membrane separation zone；Denitrification denitrogenation is carried out using remaining organic matter, sulfide, the substances such as dissolubility methane in anaerobic fermentation water outlet in anoxic filter tank, high speed nitrification is carried out in aerobic filter tank, so that Process for Effluent TN be made to reach country-level B standard.Present invention process has many advantages, such as that low operation energy consumption, the recycling of carbon source energy, nitrogen remove without additional carbon, avoid greenhouse gas emission.
Description
Technical field
The invention belongs to environmental protections, sewage treatment field, and in particular to one kind is directly converted based on carbon source, nitrogen biology is de-
The sewage low consumption processing removed and energy recovery combined treatment process.
Background technique
With the implementation of conservation culture national strategy, water environment protection cause is increasingly paid attention to, and it is sustainable to become society
The key of development.Dirty (useless) water be enrichment resource, the energy effective carrier will be dirty under global energy, the background of resource scarcity
Water pollutant carries out the development trend that energy resource transforms into sewage treatment.Activated sludge process is current municipal sewage treatment
Main stream approach, processing core are the removals of pollutant.In order to agree with the idea of sustainable development, sewage treatment is gradually by " dirty
Contaminate object removal " change to " sewage recycling, energy processing ".
Anaerobic Microbiological Treatment Technology has the advantages that power consumption is few, it is low etc. that methane gas, sludge yield can be recycled, and is to have hair
Sewage recycling, the energy processing technique of exhibition prospect.However, anaerobic biofilter, anaerobic contact method and upflow type anaerobic are dirty
That there are solid-liquid separation effects is poor for the tradition such as mud bed reactor (UASB) Anaerobic Microbiological Treatment Technology, starting time length, to low concentration
The problems such as sanitary sewage disposal low efficiency, affects anerobic sowage fermentation efficiency, and it is dirty in low concentration life to limit Anaerobic Treatment
Application in water, municipal wastewater.
Anaerobic membrane bioreactor is then able to solve these problems by effective combine of UF membrane and biological treatment.With
Traditional Anaerobic Methods in Treating is compared, anaerobic membrane bioreactor is high with volumetric loading, occupied area is small, effluent quality is good,
The advantages of HRT and SRT are kept completely separate, UF membrane can be realized the high efficient solid and liquid separation after anerobic sowage fermentation.However, anaerobism
Film-bioreactor is typically only capable to the organic pollutant in removal municipal sewage, relatively poor to the treatment effect of nitrogen.Therefore,
Ammonia nitrogen in needing to be discharged anaerobic membrane bioreactor is further processed.
Since in anaerobic membrane bioreactor, most of organic matter participates in anaerobic fermentation and removes, and general Study thinks
There is carbon source deficiency in subsequent denitrification denitrogenation.However, in addition to containing a small amount of remaining in anaerobic membrane bioreactor water outlet
Except organic matter, also contain sulfide and dissolubility methane etc., organic matter, sulfide and dissolubility methane can be used as denitrification
The electron donor of process.In addition, the presence of dissolubility methane is considered as disadvantage existing for anaerobic membrane bioreactor treatment process
Disease, methane evolution will lead to greenhouse gas emission, if it is possible to dissolubility methane are used for denitrification denitrogenation, not only solve temperature
The potential problems of room gas discharge, and can be realized denitrogenation.
The present invention be for above-mentioned background, propose it is a kind of directly converted based on carbon source, the sewage of nitrogen biological eliminating it is low
Consumption processing and energy recovery combined treatment process are not put into while realizing that sewage low consumption processing and energy recycle
Under the premise of additional carbon, using anaerobic membrane bioreactor be discharged in remaining organic matter, sulfide, dissolubility methane etc.
Substance carries out denitrogenation, and Process for Effluent TN is made to reach country-level B standard.
Summary of the invention
It is an object of the invention to propose it is a kind of directly converted based on carbon source, the sewage low consumption processing of nitrogen biological eliminating and energy
Recycle combined treatment process in source.This technique mainly carries out organic matter anaerobic fermentation by anaerobic membrane bioreactor, realizes carbon source
Direct energy sourceization recycle；Denitrogenation filter tank is set simultaneously, under the premise of not adding additional carbon, utilizes anaerobic membrane-life
The substances such as remaining organic matter, sulfide, dissolubility methane in the water outlet of object reactor carry out nitrogen removing, reach Process for Effluent TN
Country-level B standard.
It is proposed by the present invention it is a kind of directly converted based on carbon source, the sewage low consumption processing and energy recovery group of nitrogen biological eliminating
Treatment process is closed, the treatment process is realized by processing unit, and the processing unit includes anaerobic membrane bioreactor, lacks
Oxygen filter tank 3 and aerobic filter tank 4；Anaerobic membrane bioreactor includes anaerobic fermentation reaction zone 1 and membrane separation zone 2, in which: pre- place
It manages 5 bottom of water tank and connects anaerobic fermentation reaction zone 1, rely on liquid level difference flow by gravity to enter anaerobism after the preprocessed water tank 5 of sewage
Fermentation reaction area 1, anaerobic fermentation reaction zone 1 is interior to be equipped with mixing stirring device 6, and 1 bottom of anaerobic fermentation reaction zone is followed by sludge
Ring pump 7 connects 2 bottom side import of membrane separation zone with pipeline, is equipped with hollow-fibre membrane or plate membrane 10, anaerobism in membrane separation zone 2
1 top of fermentation reaction area and 2 top of membrane separation zone are equipped with sludge circulation connecting tube 8, are connected by sludge circulation pump 7 and sludge circulation
Adapter tube 8 forms sludge circulation between anaerobic fermentation reaction zone 1 and membrane separation zone 2；Lead at the top of hollow-fibre membrane or plate membrane 10
It crosses film water outlet pump 9 to be aspirated, hollow-fibre membrane or plate membrane 10 pass through film water outlet pump 9 and connect 3 bottom of anoxic filter tank with pipeline
Water inlet, anoxic filter tank 3 and aerobic filter tank 4 are all made of up-flow, and 3 top overflow port of anoxic filter tank connects aerobic 4 bottom of filter tank
Water inlet, the aerobic 4 top overflow of filter tank of up-flow are discharged, and the aerobic filter tank mixed liquor in aerobic filter tank 4 is returned by reflux pump 11
Flow to anoxic filter tank 3；Specific step is as follows:
(1) sewage after pretreatment carries out anaerobic fermentation in anaerobic fermentation reaction zone 1, carries out solid-liquid in membrane separation zone 2
Separation；Carbon source in sewage is converted into methane in anaerobic fermentation process, realizes that carbon source is converted into the energy in sewage；Its
In: anaerobic membrane bioreactor hydraulic detention time is 2 ~ 4 h；Hollow-fibre membrane or the film operating flux of plate membrane be 6 ~
10 L/(m2·h)；The organic loading of anaerobic fermentation reaction zone 1 is 3 ~ 5 kg/ (m3D), the sludge age in sewage be 60 ~
100 days；Sludge circulation pump 7 and sludge circulation connecting tube 8 form sludge between anaerobic fermentation reaction zone 1 and membrane separation zone 2 and follow
Ring；The amount of sludge circulation is 200% ~ 400%；
(2) contain ammonia nitrogen, a small amount of remaining carbon source, sulfide and dissolubility in the sewage after anaerobic fermentation energy recovery
The substances such as methane, the further denitrogenation in anoxic filter tank 3 and aerobic filter tank 4 control the reflux in anoxic filter tank 3 and aerobic filter tank 4
Than being 100% ~ 200%；
(3) Approach of Removal of Nitrogen mainly includes using remaining COD as the heterotrophic denitrification of carbon source, using methane as carbon in anoxic filter tank 3
The heterotrophic denitrification in source and using sulfide as the autotrophic denitrification of electron donor；Ammonia nitrogen after anaerobic fermentation in sewage is in aerobic filter
It is quickly nitrified in pond 4；Anoxic filter tank 3 and 4 total hrt of aerobic filter tank are 4 ~ 8 h；Aerobic filter tank 4 is discharged TN
Stablize in 20 mg/L hereinafter, ammonia nitrogen is stablized in 8 mg/L hereinafter, water stabilization reaches country-level B discharge standard.
In the present invention, anoxic filter tank 3 and aerobic filter tank 4 are all made of up-flow, and ratio of height to diameter is 8 ~ 12,3 He of anoxic filter tank
The filler that aerobic filter tank 4 uses is biological ceramic particle.
Present invention process is based on sewage carbon source and directly carries out anaerobic fermentation, generates biogas methane, realizes sewage resource
Change and recycles.Fermentation reaction area and membrane separation zone, which are provided separately, can effectively control fouling membrane, improve the production gas of anaerobic fermentation
Efficiency.Meanwhile biogas circulating pump is set, film is backwashed using biogas.In anoxic, aerobic filter tank, without outer
Under conditions of adding carbon source, makes full use of the substance in anaerobic membrane bioreactor water outlet to realize nitrogen removing, reach Process for Effluent TN
To country-level B standard.
The beneficial effects of the present invention are:
(1) anaerobic membrane bioreactor volumetric loading is high, occupied area is small, effluent quality is good, HRT and SRT divide completely
From.
(2) anaerobic membrane bioreactor reaction zone is separated with membrane separation zone, biogas backwash can effectively control film dirt
Dye, improves the gas producing efficiency of anaerobic fermentation；UF membrane operating flux is 6 ~ 10 L/ (m2H), sludge age 60 ~ 100 days.
(3) denitrification reduces the operating cost of sewage treatment without additional carbon.
(4) nitrogen removes while removing the sulfide in sewage and dissolubility methane, avoids dissolubility methane greenhouse gases
Discharge.
(5) aerobic nitrification filter tank due to remnant organic matter concentration it is low, rate of nitrification can be increased substantially, it is strong in low aeration
The high speed nitrification of ammonia nitrogen may be implemented under degree.
(6) integrated artistic has longer SRT and shorter HRT, and energy consumption is less, and can recycle methane.
Detailed description of the invention
Fig. 1 be the present invention it is a kind of directly converted based on carbon source, the sewage low consumption processing and energy recovery group of nitrogen biological eliminating
Close treatment process schematic diagram；
Fig. 2 be the present invention it is a kind of directly converted based on carbon source, the sewage low consumption processing and energy recovery group of nitrogen biological eliminating
Close treatment process working principle diagram；
Figure label: 1 is anaerobic fermentation reaction zone；2 be membrane separation zone；3 be anoxic filter tank；4 be aerobic filter tank；5 be pre-
Handle water tank；6 be mixing stirring device；7 be sludge circulation pump；8 be sludge circulation connecting tube；9 be film water outlet pump；10 be hollow
Tunica fibrosa or plate membrane；11 be filter tank reflux pump.
Specific embodiment
The present invention is further illustrated below by embodiment combination attached drawing.
Embodiment 1:
The device that present invention process uses includes anaerobic fermentation reaction zone 1, membrane separation zone 2, anoxic filter tank 3 and aerobic filter tank
4；Wherein, enter anaerobic fermentation reaction zone 1, setting in reaction zone 1 by liquid level difference flow by gravity after the preprocessed water tank 5 of sewage
Mixing stirring device 6 guarantees that sludge is uniform, by sludge circulation pump 7 and sludge circulation connecting tube 8 in reaction zone 1 and membrane separation zone
Sludge circulation is formed between 2；Membrane module 10 is aspirated by film water outlet pump 9 in membrane separation zone, and water outlet enters 3 bottom of anoxic filter tank
Portion's water inlet, anoxic filter tank 3 use up-flow, and 3 top overflow port of anoxic filter tank connects aerobic 4 bottom water inlet of filter tank, up-flow
Aerobic 4 top overflow of the filter tank water outlet of formula, aerobic filter tank mixed liquor flow back into anoxic filter tank 3 by reflux pump 11.Sewage first into
Large granular impurity in row pretreatment removal sewage.Reaction zone 1 of the sewage after pretreatment in anaerobic membrane bioreactor into
Row anaerobic fermentation is separated by solid-liquid separation in membrane separation zone 2；Film intermittent suction backwashes film using biogas；In sewage
Carbon source methane is converted into anaerobic fermentation process, contain ammonia nitrogen, a small amount of remaining carbon source, vulcanization in water outlet after UF membrane
The substances such as object, dissolubility methane.Through anaerobic membrane bioreactor, treated that sewage enters that denitrogenation filter tank carries out nitrogen removing, ammonia
Nitrogen flows back into anoxic filter tank 3 after carrying out nitration reaction in aerobic filter tank 4.Approach of Removal of Nitrogen mainly includes with residual in anoxic filter tank 3
Remaining COD is the heterotrophic denitrification of carbon source, anti-as the autotrophy of electron donor using methane as the heterotrophic denitrification of carbon source and using sulfide
Nitrification.
Typical urban sanitary sewage is handled using above-mentioned sewage treatment process and device, inlet COD concentration is 461 ± 187
Mg/L, TN concentration are 44.6 ± 15.1 mg/L, and ammonia nitrogen concentration is 28.0 ± 7.5 mg/L.Anaerobic membrane bioreactor membrane flux
For 6 L/ (m2H), the total HRT of group technology is 10h, 100 d of sludge age.Denitrogenation filter tank ratio of height to diameter is 10:1, and HRT is 6 h, reflux
Than being 150%.The conversion ratio of anaerobic membrane bioreactor methane is 0.14LCH4/gCOD.It is 15 ± 10 that technique, which is always discharged COD,
Mg/L, TN are 17.1 ± 1.4 mg/L, and ammonia nitrogen is 4.3 ± 2.8 mg/L, COD, TN, ammonia nitrogen removal frank be respectively 96.7%,
61.7%, 84.6%, water outlet TN reaches country-level B standard.
Embodiment 2:
Sewage treatment process and device as described in Example 1 handle certain southern city domestic sewage, and inlet COD concentration is
337 ± 172 mg/L, TN concentration are 48.6 ± 11.3 mg/L, and ammonia nitrogen concentration is 40.5 ± 10.2 mg/L.Anaerobic membrane-biology is anti-
Answering device membrane flux is 8 L/ (m2H), the total HRT of group technology is 10 h, 60 d of sludge age.Denitrogenation filter tank ratio of height to diameter is 8:1, HRT
For 6 h, reflux ratio 200%.The conversion ratio of anaerobic membrane bioreactor methane is 0.16LCH4/gCOD.Technique is always discharged COD
It is 16.6 ± 2.1 mg/L for 12 ± 6 mg/L, TN, ammonia nitrogen is 5.3 ± 2.1 mg/L, and COD, TN, ammonia nitrogen removal frank are respectively
96.4%, 65.8%, 86.9%, water outlet TN reaches country-level B standard.
Embodiment 3:
Sewage treatment process and device as described in Example 1 handle certain rural area sanitary sewage, and inlet COD concentration is
245 ± 105 mg/L, TN concentration are 37.4 ± 14.5 mg/L, and ammonia nitrogen concentration is 28.0 ± 12.6 mg/L.Anaerobic membrane-biology is anti-
Answering device membrane flux is 10 L/ (m2H), the total HRT of group technology is 8h, 80 d of sludge age.Denitrogenation filter tank ratio of height to diameter is 12:1, HRT
For 4 h, reflux ratio 100%.Anaerobic membrane bioreactor methane conversion is 0.12LCH4/gCOD.Technique is always discharged COD
18 ± 8 mg/L, TN are 16.5 ± 2.7 mg/L, and ammonia nitrogen is 2.3 ± 2.1 mg/L, and COD, TN, ammonia nitrogen removal frank are respectively
92.7%, 65.2%, 93.4%, water outlet TN reaches country-level B standard.
Claims (2)
1. it is a kind of directly converted based on carbon source, the sewage low consumption processing of nitrogen biological eliminating and energy recovery combined treatment process,
It is characterized in that the treatment process is realized by processing unit, the processing unit includes anaerobic membrane bioreactor, anoxic filter
Pond (3) and aerobic filter tank (4)；Anaerobic membrane bioreactor includes anaerobic fermentation reaction zone (1) and membrane separation zone (2), feature
Be: pretreatment water tank (5) bottom connects anaerobic fermentation reaction zone (1), and the preprocessed water tank of sewage (5) relies on liquid level difference weight afterwards
Power gravity flow enters anaerobic fermentation reaction zone (1), is equipped with mixing stirring device (6) in anaerobic fermentation reaction zone (1), anaerobic fermentation is anti-
It answers area (1) bottom to connect membrane separation zone (2) bottom side import with pipeline by sludge circulation pump (7), is set in membrane separation zone (2)
There are hollow-fibre membrane or plate membrane (10), anaerobic fermentation reaction zone (1) top and membrane separation zone (2) top connect equipped with sludge circulation
It takes over (8), by sludge circulation pump (7) and sludge circulation connecting tube (8) in anaerobic fermentation reaction zone (1) and membrane separation zone (2)
Between form sludge circulation；It is aspirated at the top of hollow-fibre membrane or plate membrane (10) by film water outlet pump (9), hollow-fibre membrane
Or plate membrane (10) connects anoxic filter tank (3) bottom water inlet with pipeline by film water outlet pump (9), it is anoxic filter tank (3) and aerobic
Filter tank (4) is all made of up-flow, and anoxic filter tank (3) top overflow port connects aerobic filter tank (4) bottom water inlet, and up-flow is aerobic
Filter tank (4) top overflow is discharged, and the aerobic filter tank mixed liquor in aerobic filter tank (4) flows back into anoxic filter tank by reflux pump (11)
(3)；Specific step is as follows:
(1) sewage after pretreatment carries out anaerobic fermentation in anaerobic fermentation reaction zone (1), carries out solid-liquid in membrane separation zone (2)
Separation；Carbon source in sewage is converted into methane in anaerobic fermentation process, realizes that carbon source is converted into the energy in sewage；Its
In: anaerobic membrane bioreactor hydraulic detention time is 2 ~ 4 h；Hollow-fibre membrane or the film operating flux of plate membrane be 6 ~
10 L/(m2·h)；The organic loading of anaerobic fermentation reaction zone (1) is 3 ~ 5 kg/ (m3D), the sludge age in sewage is 60
~ 100 days；Sludge circulation pump (7) and sludge circulation connecting tube (8) shape between anaerobic fermentation reaction zone (1) and membrane separation zone (2)
At sludge circulation；The amount of sludge circulation is 200% ~ 400%；
(2) contain ammonia nitrogen, a small amount of remaining carbon source, sulfide and dissolubility methane in the sewage after anaerobic fermentation energy recovery
Equal substances, the further denitrogenation in anoxic filter tank (3) and aerobic filter tank (4), control anoxic filter tank (3) and aerobic filter tank (4)
Reflux ratio is 100% ~ 200%；
(3) Approach of Removal of Nitrogen mainly includes using remaining COD as the heterotrophic denitrification of carbon source, using methane as carbon source in anoxic filter tank (3)
Heterotrophic denitrification and using sulfide as the autotrophic denitrification of electron donor；Ammonia nitrogen after anaerobic fermentation in sewage is in aerobic filter tank
(4) it is quickly nitrified in；Anoxic filter tank (3) and aerobic filter tank (4) total hrt are 4 ~ 8 h；Aerobic filter tank (4)
TN is discharged to stablize in 20 mg/L hereinafter, ammonia nitrogen is stablized in 8 mg/L hereinafter, water stabilization reaches country-level B discharge standard.
2. treatment process according to claim 1, it is characterised in that anoxic filter tank (3) and aerobic filter tank (4) ratio of height to diameter are 8
~ 12, the filler that anoxic filter tank (3) and aerobic filter tank (4) use is biological ceramic particle.
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| CN107384753B (en) * | 2017-08-15 | 2024-01-23 | 西安建筑科技大学 | High-efficiency anaerobic fermentation dynamic membrane bioreactor |
| CN107935178A (en) * | 2017-11-15 | 2018-04-20 | 中国铁道科学研究院 | A kind of railway middle and small stations area low ratio of carbon to ammonium sewage treatment unit |
| CN109775863A (en) * | 2019-03-06 | 2019-05-21 | 清华大学 | High concentrated organic wastewater anaerobism embrane method water handling reclamation set and technique |
| CN111422986B (en) * | 2020-04-10 | 2021-08-10 | 北京交通大学 | Autotrophic and heterotrophic coupling sewage deep denitrification device and method based on sulfur cycle |
| CN111484137B (en) * | 2020-05-18 | 2022-03-25 | 北京工业大学 | High-concentration wastewater treatment system and process adopting AnMBR membrane |
| CN114054482A (en) * | 2021-11-15 | 2022-02-18 | 西安建筑科技大学 | Device and method for preparing high-concentration dissolved carbon source from kitchen waste |
| CN116835761B (en) * | 2023-07-04 | 2024-05-07 | 重庆大学 | Method for directionally regulating and controlling internal carbon source to denitrification and reactor thereof |
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| CN102502959A (en) * | 2011-12-20 | 2012-06-20 | 同济大学 | Process for enhancing denitrogenation of membrane bioreactor by anaerobic fermentation acid production |
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