CN106350445A - Membrane contactor-based anaerobic digestive treatment system for side-flow recovery of ammonia nitrogen - Google Patents
Membrane contactor-based anaerobic digestive treatment system for side-flow recovery of ammonia nitrogen Download PDFInfo
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- CN106350445A CN106350445A CN201610983996.1A CN201610983996A CN106350445A CN 106350445 A CN106350445 A CN 106350445A CN 201610983996 A CN201610983996 A CN 201610983996A CN 106350445 A CN106350445 A CN 106350445A
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M21/00—Bioreactors or fermenters specially adapted for specific uses
- C12M21/04—Bioreactors or fermenters specially adapted for specific uses for producing gas, e.g. biogas
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M29/00—Means for introduction, extraction or recirculation of materials, e.g. pumps
- C12M29/04—Filters; Permeable or porous membranes or plates, e.g. dialysis
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M29/00—Means for introduction, extraction or recirculation of materials, e.g. pumps
- C12M29/18—External loop; Means for reintroduction of fermented biomass or liquid percolate
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P5/00—Preparation of hydrocarbons or halogenated hydrocarbons
- C12P5/02—Preparation of hydrocarbons or halogenated hydrocarbons acyclic
- C12P5/023—Methane
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Abstract
The invention discloses a membrane contactor-based anaerobic digestive treatment system for side-flow recovery of ammonia nitrogen, which comprises a pretreatment device, a homogenizing tank, a digestion tank, a dewatering device, a biogas slurry tank, a filter, a denitrification membrane contactor, a denitrified liquid thank, an acid circulation tank and an ammonium recovery unit, wherein the homogenizing tank is used for homogeneously mixing the pretreated feedstock and the recycled deamination liquid, and the mixed liquid enters the digestion tank; the dewatering device is used for solid-liquid separation of materials discharged from the digestion tank, the biogas residue is utilized after being treated, and the biogas slurry is temporarily stored in the biogas slurry tank; a tubular hydrophobic deamination membrane is arranged inside a deamination contactor and is used for transferring and absorbing the ammonia nitrogen molecules in the biogas slurry by use of acid penetration difference, and the denitrified liquid flows back to the homogenizing tank; and the acid circulating tank is connected with the deamination membrane contactor via a water pump and pipes to form a circulation pipeline, and acid is periodically supplemented or discharged to the ammonium recovery unit for recovery of ammonium salts according to the pH value in the tank. The device recovers the ammonia nitrogen in the biogas slurry, and the denitrified liquid flows back to the homogenizing tank, so as to avoid the inhibiting effect of the ammonia nitrogen on the digestive system and save feedstock conditioning water.
Description
Technical field
The present invention relates to environmental technology field and biomass energy utilization technology field.Can be used for changing food waste,
The biogas engineering of the anaerobic digestion of the debirs such as sewage treatment plant residual mud, agricultural wastes.
Background technology
Organic waste can reclaim the energy using Anaerobic Digestion, is the processing means with wide application prospect.
Itrogenous organic substance is eventually converted into ammoniacal nitrogen in practice it has proved that when ammonia nitrogen concentration reaches higher concentration, detesting in anaerobic digestion process
Oxygen methane phase process can arrive significant suppression, and then leads to the collapse of anaerobic digester system.Additionally, the biogas slurry of ammonia nitrogen in high density
It is to cause the waste liquid of environmental pollution it is impossible to direct discharge, due to content of organics relative deficiency, biological denitrificaion also has effective carbon
The not enough problem in source.Therefore, the higher biology of the nitrogen content such as municipal sewage plant's dewatered sludge, rubbish from cooking, feces
The Anaerobic Digestion route of matter garbage is hindered.
The solution adopting at present is mainly and charging is carried out with conditioning dilution, then biogas slurry is drained into sewage disposal system takes off
Nitrogen discharges after processing or flows back.The method needs to use fresh water, and sewage disposal system facility is complicated, scale big, increases
Processing cost.The present invention carries out recovery ammonia using deamination membrane contactor to biogas slurry, and deamination biogas slurry is partly refluxed to anaerobic digestion
The quenched pond of front end, decreases the use of fresh water；The deamination biogas slurry of discharge is easily handled, and sewage disposal system is greatly lowered
Scale, without additional carbon；Ammonium hydrogen sulfate can be reclaimed as product, produce economic worth.
Content of the invention
The invention provides a kind of Anaerobic Digestion system and method reclaiming ammonia nitrogen based on membrane contactor effluent, permissible
Effectively solving the problems referred to above.
The technical solution used in the present invention is as follows:
A kind of Anaerobic Digestion system reclaiming ammonia nitrogen based on membrane contactor effluent that the present invention provides, comprising: pre- place
Reason device, homogenizing pond, digester, dehydration device, biogas slurry pond, filter, denitrogenation membrane contactor, denitrogenation liquid pool, sour circulatory pool, ammonium
Retracting device；
Described pretreatment unit, homogenizing pond, digester, dehydration device are mutually connected successively, wherein in advance by water pump, pipeline
Processing meanss receive as system, storage, conveying, the device of allotment raw material, can receive liquid and the various ways such as solid-state has
Machine garbage.
Setting mixing agitator, heating tube inside described homogenizing pond, by water pump, pipeline and pretreatment unit, denitrogenation liquid
Pond is connected, and receives the organic waste raw material after preprocessed device is processed, partly taking off after deamination membrane contactor is processed
Ammoniacal liquor；Mixed liquor is delivered to by digester by pipeline and carries out Anaerobic Digestion；Meanwhile, by pipeline, heating tube is given birth to steam
Product system connects, and material in homogenizing pond is heated.
The equipment such as described dehydration device is by feeding, be dehydrated, discharging, dosing form, and discharging after Anaerobic Digestion is carried out
Solid-liquid separation, isolates biogas residue and the biogas slurry rich in ammonia nitrogen；Wherein, biogas residue is comprehensively utilized after treatment, rich in ammonia nitrogen
Biogas slurry carries out temporary pending in biogas slurry pond.
Described filter receives the biogas slurry that the pumping of biogas slurry reservoir comes, and to its preliminary filtration treatment, filtering accuracy is 1-
5um, prevents deamination film from blocking.
It is provided with described deamination membrane contactor and by amino molecule but the tubular type hydrophobicity that hydrone passes through can be stoped to take off
Ammonia film, film both sides are diluted acid mobile phase and biogas slurry respectively；Under the cross-film transmission driving force effect that diluted acid mobile phase is formed, biogas slurry
In ammonia cross over deamination film with molecular forms and enter into film opposite side and absorbed by diluted acid；After denitrogenation, biogas slurry is temporary in denitrogenation liquid pool
Deposit stand-by, part denitrogenation liquid needs to be partly refluxed to homogenizing pond, unnecessary denitrogenation liquid qualified discharge after treatment according to technique；For obtaining
The ammonia removal efficiency of get Geng Gao, deamination membrane contactor system can be to be arranged in the form of plural serial stage, and supporting filter, acid follow
Cisterna ambiens using sharing and can be classified setting two ways.
Described acid circulatory pool passes through water pump, pipeline is connected with deamination membrane contactor, defines ammonia nitrogen absorption cycle pipeline；Acid
In circulatory pool, acid solution enters deamination membrane contactor by sour fluid inlet in the presence of pump, and the acid solution after absorbing ammonia nitrogen molecular is from de-
The sour liquid-phase outlet of ammonia membrane contactor is discharged and is back to sour circulatory pool by pipeline；In sour circulatory pool, setting online ph meter, real
When feedback pond in acid-base value；According to ph situation periodically to supplemental acid in sour circulatory pool, or circulation acid solution is delivered to ammonium retracting device
Carry out ammonium salt reclamation process.
The invention has the beneficial effects as follows:
(1) using deamination membrane contactor, the ammonia nitrogen in rich ammonia biogas slurry is reclaimed, be nitrogen with other by mineralized nitrogen
Technical scheme compare, it is possible to obtain value product ammonium hydrogen sulfate, processing cost is relatively low；
(2) deamination biogas slurry is back to homogenizing pond, reduces ammonia nitrogen concentration in anaerobic digester, weaken ammonia inhibition and make
With anaerobic digestion efficiency can be improved, and reduces quenched fresh water usage amount.
Brief description
A kind of Anaerobic Digestion system knot reclaiming ammonia nitrogen based on membrane contactor effluent that Fig. 1 provides for patent of the present invention
Structure schematic diagram.
Description of reference numerals；
1: pretreatment unit；2: homogenizing pond；3: digester；4: dehydration device；5: biogas slurry pond；6: filter；7: denitrogenation film
Catalyst；8: denitrogenation liquid pool；9: sour circulatory pool；10: ammonium retracting device.
Specific embodiment
Below in conjunction with the accompanying drawings technical scheme is elaborated:
Embodiment one:
Changing food waste treatment plant in certain Venous Industrial garden southern, treatment scale is 100t/d (solid content average out to
24%), collect and process the changing food waste of certain city region public institution of state-owned enterprise dining room, large hotel and holiday village etc..Technique is
Reclaim the Anaerobic Digestion system of ammonia nitrogen with membrane contactor effluent, that is, pretreatment (sorting+screening+broken+steaming and decocting is deoiled)+
Anaerobic digestion+solid-liquid separation, sells as fertilizer after biogas residue compost, and biogas slurry adopts membrane contactor effluent to reclaim conduct after ammonia nitrogen
Charging modulation water uses, remaining standard discharge.
Changing food waste plant in pretreatment unit (1) first carry out sorting, screen, crush, the process such as steaming and decocting is deoiled, after process
The average solid content of changing food waste is 24%, and wherein ammonia-nitrogen content is about the 4% of over dry material；Through pump with pipeline to accompanying drawing institute
The homogenizing pond (2) showing, its dischargeable capacity 300m3；By pretreated changing food waste and in denitrogenation liquid pool (8) in this pond
Temporary, process through deamination membrane contactor (6) after denitrogenation liquid mixed, wherein nh in the deamination biogas slurry of backflow3-n≤
150mg/l, capacity of returns is about 100～180m3/ d (determines according to kitchen property)；Kitchen rubbish is mixed homogeneously with denitrogenation liquid, and mixed
Close liquid solid content to adjust to 10% about, adopt steam heated material to 37 ± 1 DEG C simultaneously, digester is delivered to by pump and pipeline
(3) carry out Anaerobic Digestion in.Mixed material occurs anaerobic digestion to react in digester (3), digestion time 15-30 days,
Organic substance is converted into biogas the most at last, through collecting and being delivered to biogas treatment and utilize system；
The daily discharging of digester (3), discharging carries out processed through pump and Pipeline transport to dehydration device (4)；This case
Example adopts high pressure sheet frame dewaterer separation biogas residue and biogas slurry, and the disposal ability of dehydration device (4) is 12-15m3/ h, dewatered sludge produces
Amount is about 1-2t/h (moisture content≤60%), supporting feed worm pump, high-pressure pump, air compressor machine, belt conveyor, dosing pump, molten
The equipment such as medicinal cupping, conditioning tank；Biogas residue postpones through heap and uses as fertilizer or Nutrition Soil；Dehydration device (4) filtrate production is about
12-15m3/ h, storage in biogas slurry reservoir (5), its dischargeable capacity is 260m3, filtrate nh3- n concentration is less than 1200mg/l.Rich
Ammonia biogas slurry, after the filter (6) for 2-5um for the filtering accuracy, is pumped to deamination membrane contactor (7), and the ammonia nitrogen in biogas slurry passes through
Hydrophobicity deamination film, enters into the dilute sulfuric acid absorbing liquid inside tubular membrane, forms ammonium hydrogen sulfate.Deamination film contact in present case
Device (7) single-stage is arranged, and ammonia removal efficiency is not less than 50%, forms the nh in final deamination biogas slurry3- n concentration is less than 150mg/
l；Deamination biogas slurry enter deamination liquid pool (8) keep in, when anaerobic digester system proceeds by raw material quenched operation, then be back to into
Expect that quenched pond (2) is carried out to raw material quenched；Simultaneously unnecessary biogas slurry overflow discharge is to follow-up biogas slurry treatment system.
Sour circulatory pool (9) and deamination membrane contactor (7) form closed circuit, the online ph meter of interior setting, maintain ph value for 1～
2, the absorption process with ammonia nitrogen is constantly carried out, and when ph value is more than 2, adds 98% concentrated sulphuric acid to sour circulatory pool (9), through 15
After～25 supplementary concentrated acids, the absorbing liquid in acid cycle pond (9) is pumped to ammonium salt reclamation device (10) through ammonium salt solution and enters
Row ammonium salt reclamation.
The invention has the beneficial effects as follows:
(1) using deamination membrane contactor, the ammonia nitrogen in rich ammonia biogas slurry is reclaimed, be nitrogen with other by mineralized nitrogen
Technical scheme compare, it is possible to obtain value product ammonium hydrogen sulfate, processing cost is relatively low；
(2) deamination biogas slurry is back to homogenizing pond, reduces ammonia nitrogen concentration in anaerobic digester (by no this system
The near 1200mg/l of 5000-6000mg/l), largely reducing the inhibitory action to anaerobic system for the ammonia nitrogen, anaerobism can be improved and disappear
Change efficiency, reduce quenched fresh water usage amount.
Embodiment two:
City of Hebei province specific resistance to filtration center, treatment scale is 300t/d (solid content 20%), collects and processes certain
The dewatered sludge that in city region, municipal sewage plant produces.Technique is to reclaim the anaerobic digestion of ammonia nitrogen with membrane contactor effluent
Processing system, i.e. sludge storage bin+homogenizing pond+anaerobic digestion+solid-liquid separation, as Nutrition Soil after biogas residue compost, biogas slurry adopts film
Catalyst effluent uses as charging modulation water after reclaiming ammonia nitrogen, remaining standard discharge.
Sludge of sewage treatment plant delivers to the pretreatment unit (1) at Treatment of Sludge center, pretreatment unit by sealing vehicle
(1) sludge storage bin, conveyer, pulp machine are included；Mud ammonia-nitrogen content is about the 2% of over dry material after pretreatment；Through pump with
Pipeline is to homogenizing pond (2) shown in the drawings, its dischargeable capacity 500m3；In this pond by pretreated mud be derived from
Keep in denitrogenation liquid pool (8), the denitrogenation liquid after deamination membrane contactor (6) process is mixed, the wherein deamination natural pond of backflow
Nh in liquid3- n≤100mg/l, capacity of returns is about 150～200m3/d；Mud is mixed homogeneously with denitrogenation liquid, and mixed liquor solid content
Adjust to 8% about, adopt steam heated material to 37 ± 1 DEG C simultaneously, delivered in digester (3) by pump and pipeline and detested
Oxygen digestion process.Mixed material occurs anaerobic digestion to react in digester (3), digestion time 15-30 days, Organic substance the most at last
It is converted into biogas, through collecting and being delivered to biogas treatment and utilize system；
The daily discharging of digester (3), discharging carries out processed through pump and Pipeline transport to dehydration device (4)；This case
Example adopts high pressure sheet frame dewaterer separation biogas residue and biogas slurry, and the disposal ability of dehydration device (4) is 30-50m3/ h, mud extraction is aqueous
Rate≤60%, the equipment such as supporting feed worm pump, high-pressure pump, air compressor machine, belt conveyor, dosing pump, drug dissolving tank, conditioning tank；
Biogas residue postpones through heap and uses as afforestation Nutrition Soil；Dehydration device (4) filtrate production is about 30-50m3/ h, in biogas slurry storage
Storage in pond (5), its dischargeable capacity is 500m3, filtrate nh3- n concentration is less than 1000mg/l.Rich ammonia biogas slurry is through filtering accuracy
After filter (6) for 2-5um, it is pumped to deamination membrane contactor (7), the ammonia nitrogen in biogas slurry passes through hydrophobicity deamination film, enter
Dilute sulfuric acid absorbing liquid to inside tubular membrane, forms ammonium hydrogen sulfate.Deamination membrane contactor (7) single-stage setting in present case, takes off
Ammonia efficiency is not less than 50%, forms the nh in final deamination biogas slurry3- n concentration is less than 120mg/l；Deamination biogas slurry enters de-
Ammoniacal liquor pond (8) is kept in, and when anaerobic digester system proceeds by raw material quenched operation, then is back to the quenched pond of charging (2) to former
Material carries out quenched；Simultaneously unnecessary biogas slurry overflow discharge is to follow-up biogas slurry treatment system.
Sour circulatory pool (9) and deamination membrane contactor (7) form closed circuit, the online ph meter of interior setting, maintain ph value for 1～
2, the absorption process with ammonia nitrogen is constantly carried out, and when ph value is more than 2, adds 98% concentrated sulphuric acid to sour circulatory pool (9), through 15
After～25 supplementary concentrated acids, the absorbing liquid in acid cycle pond (9) is pumped to ammonium salt reclamation device (10) through ammonium salt solution and enters
Row ammonium salt reclamation.
The invention has the beneficial effects as follows:
(1) using deamination membrane contactor, the ammonia nitrogen in rich ammonia biogas slurry is reclaimed, be nitrogen with other by mineralized nitrogen
Technical scheme compare, it is possible to obtain value product ammonium hydrogen sulfate, processing cost is relatively low；
(2) deamination biogas slurry is back to homogenizing pond, reduces ammonia nitrogen concentration in anaerobic digester (by no this system
The near 1000mg/l of 2000-3000mg/l), largely reducing the inhibitory action to anaerobic system for the ammonia nitrogen, anaerobism can be improved and disappear
Change efficiency, reduce quenched fresh water usage amount.
Claims (8)
1. a kind of Anaerobic Digestion system based on membrane contactor effluent recovery ammonia nitrogen is it is characterised in that described system includes:
Pretreatment unit, homogenizing pond, digester, dehydration device, biogas slurry pond, filter, denitrogenation membrane contactor, denitrogenation liquid pool, acid
Circulatory pool, ammonium retracting device；
Described homogenizing pond receives the deamination liquid of the charging after pretreatment unit is processed and the backflow of denitrogenation liquid pool, after mix homogeneously
Mixed liquor be pumped up carrying out anaerobic digestion to digester；
Described dewaterer carries out solid-liquid separation to digester discharging, and biogas residue utilizes after treatment, and biogas slurry is temporarily stored into biogas slurry pond；
Described filter is tentatively to filter biogas slurry, the system protection device of protection deamination film；
Set tubular type hydrophobicity deamination film in described deamination membrane contactor, migrate and absorb in biogas slurry using the infiltration difference that acid solution is formed
Ammonia nitrogen molecule, after denitrogenation, biogas slurry is temporarily stored into denitrogenation liquid pool and is partly refluxed to homogenizing pond, and unnecessary denitrogenation liquid is up to standard after treatment
Discharge；
Described acid circulatory pool is connected to form acid cycle pipeline by water pump, pipeline and deamination membrane contactor, and according to ph in pond
Periodically mend acid or circulation acid solution is delivered to ammonium retracting device recovery ammonium salt；
2. a kind of Anaerobic Digestion system reclaiming ammonia nitrogen based on membrane contactor effluent according to claim 1, it is special
Levy and be, described pretreatment unit, homogenizing pond, digester, dehydration device are mutually connected successively, wherein in advance by water pump, pipeline
Processing meanss receive as system, storage, conveying, the device of allotment raw material, can receive liquid and the various ways such as solid-state has
Machine garbage.
3. a kind of Anaerobic Digestion system reclaiming ammonia nitrogen based on membrane contactor effluent according to claim 1, it is special
Levy and be, setting mixing agitator, heating tube inside described homogenizing pond, by water pump, pipeline and pretreatment unit, denitrogenation liquid pool
It is connected, receive the organic waste raw material after preprocessed device is processed, the part deamination after deamination membrane contactor is processed
Liquid；Mixed liquor is delivered to by digester by pipeline and carries out Anaerobic Digestion；Meanwhile, by pipeline, heating tube is produced with steam
System connects, and material in homogenizing pond is heated.
4. a kind of Anaerobic Digestion system reclaiming ammonia nitrogen based on membrane contactor effluent according to claim 1, it is special
Levy and be, the equipment such as described dehydration device is by feeding, be dehydrated, discharging, dosing forms, and discharging after Anaerobic Digestion is carried out solid
Liquid separates, and isolates biogas residue and the biogas slurry rich in ammonia nitrogen；Wherein, biogas residue is comprehensively utilized after treatment, the natural pond rich in ammonia nitrogen
Liquid carries out temporary pending in biogas slurry pond.
5. a kind of Anaerobic Digestion system reclaiming ammonia nitrogen based on membrane contactor effluent according to claim 1, it is special
Levy and be, described filter receives the biogas slurry that the pumping of biogas slurry reservoir comes, and to its preliminary filtration treatment, filtering accuracy is 1-
5um, prevents deamination film from blocking.
6. a kind of Anaerobic Digestion system reclaiming ammonia nitrogen based on membrane contactor effluent according to claim 1, it is special
Levy and be, be provided with described deamination membrane contactor and by amino molecule but the tubular type hydrophobicity deamination that passes through of hydrone can be stoped
Film, film both sides are diluted acid mobile phase and biogas slurry respectively；Under the cross-film transmission driving force effect that diluted acid mobile phase is formed, in biogas slurry
Ammonia cross over deamination film with molecular forms and enter into film opposite side and absorbed by diluted acid；After denitrogenation, biogas slurry is temporary in denitrogenation liquid pool
Stand-by, part denitrogenation liquid needs to be partly refluxed to homogenizing pond, unnecessary denitrogenation liquid qualified discharge after treatment according to technique；For obtaining
Higher ammonia removal efficiency, deamination membrane contactor system can be to be arranged in the form of plural serial stage, and supporting filter, acid circulate
Pond using sharing and can be classified setting two ways.
7. a kind of Anaerobic Digestion system reclaiming ammonia nitrogen based on membrane contactor effluent according to claim 1, it is special
Levy and be, described acid circulatory pool passes through water pump, pipeline is connected with deamination membrane contactor, defines ammonia nitrogen absorption cycle pipeline；Acid
In circulatory pool, acid solution enters deamination membrane contactor by sour fluid inlet in the presence of pump, and the acid solution after absorbing ammonia nitrogen molecular is from de-
The sour liquid-phase outlet of ammonia membrane contactor is discharged and is back to sour circulatory pool by pipeline；In sour circulatory pool, setting online ph meter, real
When feedback pond in acid-base value；According to ph situation periodically to supplemental acid in sour circulatory pool, or circulation acid solution is delivered to ammonium retracting device
Carry out ammonium salt reclamation process.
8. a kind of the Anaerobic Digestion system and method for ammonia nitrogen is reclaimed it is characterised in that the method based on membrane contactor effluent
Including:
At a kind of anaerobic digestion based on membrane contactor effluent recovery ammonia nitrogen described in any one of the claims 1～7
Reason system；
Pretreatment unit receive, storage, conveying and allotment the various ways such as liquid and solid-state organic waste, and by pump with
Pipeline transport is to homogenizing pond；Raw material after pretreatment is in the part deamination in homogenizing pond and after deamination membrane contactor is processed
Liquid uniformly mixes, and mixed liquor is delivered to digester by pipeline and carried out Anaerobic Digestion；Digester discharging is entered in dehydration device
Row solid-liquid separation, biogas residue comprehensively utilizes after treatment, and biogas slurry is temporarily stored into biogas slurry pond；Biogas slurry tentatively filters biogas slurry through filter and enters
Enter deamination membrane contactor and carry out denitrogenation processing, in this membrane contactor, set tubular type hydrophobicity deamination film, under acid solution effect, absorb warp
Ammonia nitrogen in biogas slurry after filtration, after denitrogenation, biogas slurry carries out temporary in denitrogenation liquid pool and is partly refluxed to homogenizing pond as needed；Acid
Liquid recycles between deamination membrane contactor, sour circulatory pool, and periodically mends acid according to ph in pond or circulation acid solution is delivered to ammonium return
Receiving apparatus reclaim ammonium salt.This device reclaims ammonia nitrogen in biogas slurry, and denitrogenation liquid is partly refluxed to homogenizing pond, it is to avoid ammonia nitrogen is to digestive system
Inhibitory action, saving charging is quenched to use water.
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| CN109133539A (en) * | 2018-10-17 | 2019-01-04 | 苏州艾吉克膜科技有限公司 | The processing unit and treatment process of coal chemical industry gasification burner waste water |
| CN112322665A (en) * | 2020-10-30 | 2021-02-05 | 江苏省农业科学院 | Anaerobic fermentation method for organic domestic garbage in villages and towns |
| CN114590983A (en) * | 2022-03-16 | 2022-06-07 | 上海市政工程设计研究总院（集团）有限公司 | Digestion system, digestion system for treating sludge and method for treating mixed liquor |
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