CN107176750A - A kind of livestock and poultry farm biogas slurry film concentrates preprocess method - Google Patents
A kind of livestock and poultry farm biogas slurry film concentrates preprocess method Download PDFInfo
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- CN107176750A CN107176750A CN201710352199.8A CN201710352199A CN107176750A CN 107176750 A CN107176750 A CN 107176750A CN 201710352199 A CN201710352199 A CN 201710352199A CN 107176750 A CN107176750 A CN 107176750A
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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
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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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
- C02F1/02—Treatment of water, waste water, or sewage by heating
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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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
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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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- Environmental & Geological Engineering (AREA)
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Abstract
A kind of livestock and poultry farm biogas slurry film concentration pretreatment system of the present invention, it is located at biogas slurry film concentration systems front end, by ammonia aeration post and ammonia absorber, film nitrator is constituted, ammonia aeration post connects biogas slurry pond respectively, ammonia absorber and film nitrator, biogas slurry through separation of solid and liquid enters ammonia aeration post, stripping post rear end connects ammonia absorber, biogas slurry after ammonia aeration enters film nitrator, inoculation of activated-sludge, add external source easily oxidized organic carbon source, pass through the microporous aeration device installed in film nitrator bottom, with certain oxyty in maintenance reaction device, the ammonium nitrogen remained in biogas slurry changes into nitrate nitrogen under nitrification, ensure effluent quality pH value in subacidity and certain ammonium nitrate nitrogen ratio, discharge water to biogas slurry film concentration systems.Present invention also offers the processing method using said system.The present invention effectively reduces inhibitory action of the biogas slurry middle and high concentration ammonium nitrogen to nitrification pretreatment；Shorten nitrification pretreatment Hydraulic retention time, improve actual operating efficiency.
Description
Technical field
The invention belongs to utilization of agricultural resources utilization and ecological environmental protection field, it is related to a kind of livestock and poultry farm biogas slurry film concentration
Preprocess method.
Background technology
Livestock and poultry breeding industry occupies highly important effect in Chinese national economy, the product that it is provided, in national economy
In it is indispensable, but it in evolution also along with a large amount of pollutant emissions, reducing breeding pollution can for aquaculture health
Sustainable development is particularly significant.
Anaerobic fermentation technology, because it can produce clean energy resource in processing livestock and poultry cultivation field waste, and extremely payes attention to, so
And breeding waste is handled through anaerobic fermentation, the mineral element such as nitrogen, phosphorus is only capable of making in carbon decrement in discarded object, discarded object still
It is present in tunning-biogas residue, biogas slurry, although pass through biogas slurry returning to the field technology, it is possible to achieve nitrogen phosphor resource is utilized in biogas residue liquid,
But because of aquaculture maximization, region about centralization so that breeding is separated, biogas residue liquid farmland dissolve mode practical application when difficult weight
Weight, therefore urgently develops a kind of biogas slurry nutrient concentration technique, thus film concentration technique arises at the historic moment.
King's denier is first-class（2012）Conventional panels, rolling ultrafiltration membrane pretreatment biogas slurry is used to obtain concentrated liquid organic fertilizer.Clearly
A kind of synchronous coagulation-absorption of sewage-film concentration recycling pretreatment unit and its method have been invented by Hua Da wangkai army etc.（CN
104118952 A）, the invention realizes the concentration of efficient carbon nitrogen source.Beijing Environmental Protection Science Inst.'s Wei's fountainhead, is also disclosed
A kind of livestock and poultry feces processing system and method based on film concentration technique（CN 102249507 A）, the system includes：One-level
Anaerobic fermentation reactor, equipment for separating liquid from solid, film condensing device and B grade anaerobic fermentation reactor, using membrane technology as core, with
Realize that biogas slurry nutrient is concentrated, resource high-efficiency Multi-class propagation.
But, film concentrates breeding wastewater there is also technical bottleneck, i.e.,：Ammonium nitrogen concentration is very high in general breeding wastewater, and film is dense
After contracting, one side ammonium nitrogen can volatilization loss in a gaseous form, cause follow-up fertilizer efficiency unstable；On the other hand, higher ph makes dense
Sheepshank dirt is serious, membrane flux rapid decrease.The effective way for solving this technical barrier is to add acid for adjusting pH value to acidity.Liang Kang
By force（2012）Show in the biogas slurry concentration research based on reverse osmosis technology, adjust the pH value of sewage, not only reduce nitrogen volatilization
And fouling can be prevented to block raising membrane flux to reduce film.But, this brings two big negative factors, on the one hand due to acid adding
Cause waste water ion concentration to rise, add the load of subsequent film concentration, and then influence film thickening efficiency；On the other hand additionalization
Acid is learned, the chemical component for changing waste water is unfavorable for the subsequent development of subsequent concentration liquid.
In this regard, a kind of patent " the engineering film concentration systems of biogas slurry（CN 203999406 U）" and a kind of " biogas slurry resource
Change concentration and recovery and utilize processing method and system（CN 105967414 A）", it is proposed that acid is hydrolyzed before the concentration of biogas slurry film
Change pretreatment, it is contained therein for acidifying because waste water is after anaerobic fermentation to reduce biogas slurry pH value, but in practical engineering application
Organic concentration is hydrolyzed very low, it is difficult to which acidifying or time are very long, in addition the basicity of biogas slurry middle and high concentration ammonium nitrogen formation, it is difficult to make
Wastewater pH is reduced.
Ring hair institute of Chinese Academy of Agricultural Sciences Zhu Zhi equalitys, have also been proposed precipitation and nitrification preprocess method（A kind of biogas slurry is dense
Contracting and the A of method and apparatus CN 102050553 of standard emission of clear）, i.e., the ammonium nitrogen in biogas slurry is realized by nitrification processing
Nitrate nitrogen is converted into, to reduce biogas slurry pH value.
Ammonium nitrogen concentration is up to 2000-3000mg/l in general livestock and poultry farm biogas slurry, and ammonia nitrogen in high density has to nitration reaction
Serious inhibitory action, is added by utilizing carbon source to be limited in biogas slurry, in practical engineering application, nitration reaction process is very slow, it is difficult to
Reach practical implementation effect.
The content of the invention
To solve the above problems, the present invention proposes a kind of livestock and poultry farm biogas slurry film concentration pretreatment system, it is by this
Ammonium nitrogen concentration in system, reduction biogas slurry, reduces the inhibitory action to follow-up nitration reaction, is produced using microorganism nitrification endogenous
Acid, realizes reduction pH value, reaches the purpose of ammonia nitrogen waste water film concentration pretreatment.
It is another object of the present invention to：The method that biogas slurry treatment is carried out using said system is provided.
What the object of the invention was realized in：A kind of livestock and poultry farm biogas slurry film concentrates pretreatment system, is arranged on biogas slurry
Film concentration systems front end, including film nitrator, it is made up of ammonia aeration post with ammonia absorber, film nitrator, described
Ammonia aeration post connect biogas slurry pond, ammonia absorber and film nitrator respectively, the biogas slurry through separation of solid and liquid enters ammonia aeration post,
Stripping post rear end connects ammonia absorber, biogas slurry after ammonia aeration enter film nitrator, inoculation of activated-sludge, addition it is outer
Source organic carbon source, by the microporous aeration device installed in film nitrator bottom, with certain dissolved oxygen in maintenance reaction device
Ammonium nitrogen changes into nitrate nitrogen under nitrification in concentration, biogas slurry, it is ensured that effluent quality pH value is in subacidity and certain ammonium nitre
State nitrogen ratio, discharges water to biogas slurry film concentration systems.
On the basis of such scheme, biogas slurry is entered by water pump from the top of ammonia aeration post after the separation of solid and liquid, the ammonia
Hollow ball filler is full of in stripping post, biogas slurry flows from top to down through filler, while passing through blower fan one in the bottom of ammonia aeration post
Air blast, carries out gas-liquid exchange in ammonia aeration post, and gas enters from the top discharge of ammonia aeration post through the air blast of blower fan two from bottom
Ammonia absorber is carried out discharging the gas except ammonia nitrogen at the top of the removal of ammonia nitrogen, ammonia absorber, and by blower fan one, air blast is entered again
Enter ammonia aeration post.To reduce tail gas generation.
On the basis of such scheme, described ammonia aeration post is connected with biogas generator exhaust duct through blower fan three, is described
Ammonia aeration post provide heat energy.To reduce heat loss.
On the basis of such scheme, described film nitrator is the installation film group in the container of certain volume volume
Part, membrane module uses hollow-fibre membrane, film the silk ㎜ of external diameter 2.4, the ㎜ of internal diameter 1.0, and it is 0.2 μm that it, which retains aperture, and membrane material is poly-
Ethene, as microbe carrier and preventing inoculation of activated-sludge to be lost in.Improve nitrobacteria activity.Wherein：
In invention, the activated sludge from sewage disposal is inoculated with described film nitrator, is obtained with being inoculated with nitrobacteria
Described inoculation of activated-sludge.
External source organic carbon source is added in described film nitrator to refer to：Add glucose, disaccharides, starch, blackstrap
Deng easily oxidized organic carbon, addition is 8~10 times of ammonium nitrogen quantity in biogas slurry in the domestication stage（w/w）, operation phase external source is organic
Carbon addition is 1-2 times (w/w) of ammonium nitrogen quantity.
In invention, microporous aeration device is set in described film nitrator bottom, with dissolved oxygen in maintenance reaction device
Concentration is between 2~4mg/l.
The present invention provides a kind of processing method that pretreatment system is concentrated using above-mentioned livestock and poultry farm biogas slurry film, by following
Step：
First, it is 5~10 that liquid, the biogas slurry separated admittedly, which are pumped to filler ratio of height to diameter in ammonia aeration post, post, in fen：1, meanwhile, ammonia
Stripping post is heated and from bottom blast, and stripping post heating thermal source is provided by biogas generator waste heat, is to stripping running temperature
40~500C, gas-water ratio is 2000~4000：1, ammonia-containing gas are discharged from ammonia aeration post, ammonia nitrogen in biogas slurry is reduced to 1000mg/L
Within, preferably to make ammonia nitrogen in biogas slurry be reduced within 800mg/L；
Second, ammonia nitrogen is reduced to the biogas slurry within 1000mg/L and entered in film nitrator, and ammonium nitrogen is under nitrification in biogas slurry
Change into nitrate nitrogen, it is ensured that effluent quality pH be 5.5~6.5 between, ammonium nitrate nitrogen compares NH4-N：NOx- N is 1~10:Between 1；
3rd, ammonia-containing gas enter from ammonia absorber bottom, and dilute sulfuric acid solution solution is full of in tower, and filled with irregular shape
Filler, the gas discharged through ammonia absorber is again introduced into ammonia aeration post, and gas is recycled, and is produced with reducing heat loss with tail gas
It is raw, realize resource high-efficiency conversion with recycling.
Using this preprocess method, it is remarkably improved biogas slurry film thickening efficiency and significantly reduces ammonium nitrogen in concentrate
Gaseous loss.
The advantage that the technology indicators of overall performance of the present invention is compared with similar technique is：
First, in biogas slurry film concentration nitrification pretreatment front end, ammonia aeration and absorption technique are added, biogas slurry middle and high concentration is reduced
Ammonium nitrogen is carried out to the inhibitory action of nitrification pretreatment with ensuring to nitrify pretreatment；
Second, using film nitrator, acted on using the separation of solid and liquid of film, retain nitrifying microorganisms, more conventional activated sludge
Method, nitrifying microorganisms activity that can be higher in maintenance reaction device；
3rd, by adding external source organic carbon source, the propagation of nitrobacteria can be accelerated, when shortening nitrification pretreatment hydraulic retention
Between, improve engineering actual operating efficiency.
Brief description of the drawings
The present system schematic diagram of accompanying drawing 1；
Label declaration in figure：
10 --- livestock and poultry farm biogas slurry film concentrates pretreatment system；
1 --- ammonia aeration post；2 --- ammonia absorber；
3 --- film nitrator；4 --- biogas slurry pond；
5 --- biogas slurry film concentration systems；
6th, 7 --- blower fan one, two；
8 --- biogas Wind turbines；9 --- waste heat pressure fan.
Embodiment
Biogas slurry is after flocculation sediment-separation of solid and liquid in certain pig farm biogas engineering, 10 tons of biogas slurry of daily output, biogas slurry pond 4, water outlet
COD3000mg/l、NH4-N2300mg/l。
As shown in Figure 1：Livestock and poultry farm biogas slurry film concentrates pretreatment system 10, is arranged on the front end of biogas slurry film concentration systems 5,
It is made up of ammonia aeration post 1, ammonia absorber 2 and film nitrator 3, described ammonia aeration post 1 connects biogas slurry pond 4, ammonia and inhaled respectively
Tower 2 and film nitrator 3 are received, the biogas slurry through separation of solid and liquid enters ammonia aeration post 1, the rear end of ammonia aeration post 1 connection ammonia absorber
2, the biogas slurry after ammonia aeration enters film nitrator 3, through inoculation of activated-sludge, external source organic carbon source, and installed in film nitre
Change the microporous aeration device of the bottom of reactor 3, with ammonium nitrogen in certain oxyty, biogas slurry in maintenance reaction device under nitrification
Change into nitrate nitrogen, it is ensured that effluent quality pH value discharges water to biogas slurry film concentration system in subacidity and certain ammonium nitrate nitrogen ratio
System.
Biogas slurry is pumped into the top inlet of ammonia aeration post 1 after the separation of solid and liquid, is filled out in the ammonia aeration post 1 full of hollow ball
Material, biogas slurry flows from top to down through filler, while in the bottom of ammonia aeration post 1 by the air blast of blower fan 1, in ammonia aeration post 1
Gas-liquid exchange is carried out, gas enters ammonia absorber 2 from bottom through the air blast of blower fan 27 from the top discharge of ammonia aeration post 1 and carries out ammonia
The removal of nitrogen, the top of ammonia absorber 2 discharges the gas except ammonia nitrogen, and by blower fan 1, air blast enters ammonia aeration post 1 again
In.
In the present embodiment, described ammonia aeration post 1 is connected with the waste heat pressure fan 9 of Biogas Generator Set 8, is that described ammonia blows
De- post 1 provides heat energy, is produced with reducing heat loss with tail gas.
Described film nitrator 3 is that membrane module is installed in the container of certain volume volume, and membrane module is using hollow
Tunica fibrosa, film the silk ㎜ of external diameter 2.4, the ㎜ of internal diameter 1.0, it is 0.2 μm that it, which retains aperture, and membrane material is polyethylene, is carried as microorganism
Body and prevent inoculation of activated-sludge to be lost in, improve nitrobacteria activity.
The activated sludge from sewage disposal is inoculated with described film nitrator 3, institute is obtained to be inoculated with nitrobacteria
The inoculation of activated-sludge stated.
External source organic carbon source is added in described film nitrator to refer to：Add glucose, disaccharides, starch, blackstrap
Class easily oxidized organic carbon, addition is 8~10 times of ammonium nitrogen quantity in biogas slurry, the addition of operation phase external source organic carbon in the domestication stage
Measure as 1~2 times of ammonium nitrogen quantity.
Microporous aeration device is set in described film nitrator bottom, with dissolved oxygen concentration in maintenance reaction device 2
Between~4mg/l.
Biogas slurry treatment is carried out using above-mentioned livestock and poultry farm biogas slurry film concentration pretreatment system 10, in the steps below：
First, it is 5~10 that liquid, the biogas slurry separated admittedly, which are pumped to filler ratio of height to diameter in ammonia aeration post 1, post, in biogas slurry pond 4：1, together
When, ammonia aeration post 1 is heated and from bottom blast, and ensures that stripping running temperature is 40~500C, gas-water ratio be 2000~
4000：1, ammonia-containing gas are discharged from stripping post, through ammonia aeration, water outlet COD and NH4- N is down to 2650mg/l, 940mg/l respectively；
Second, water outlet is pumped into film nitrator 3, in 10m3Under/min aeration quantity（Dissolved oxygen concentration maintains 3mg/l
Left and right）, temperature is in 28 DEG C and hydraulic detention time（HRT）In the case of 24h, addition blackstrap amount is 12kg/d, continuous fortune
Row 100 days, water outlet pH value is maintained between 5.3~6.4 always, and NH4-N：NOx- N-dimensional holds 1.5~3：Fluctuate, realize between 1
The effect reached required by present invention pretreatment.
3rd, ammonia-containing gas enter from ammonia absorber bottom, dilute sulfuric acid solution solution are full of in tower, and do not advise filled with shape
Then filler, the gas discharged through ammonia absorber is again introduced into ammonia aeration post, and gas can be recycled.
Claims (9)
1. a kind of livestock and poultry farm biogas slurry film concentrates pretreatment system, biogas slurry film concentration systems front end, including film nitrification are arranged on
Reactor, it is characterised in that it is made up of ammonia aeration post with ammonia absorber, film nitrator, described ammonia aeration post difference
Biogas slurry pond, ammonia absorber and film nitrator are connected, the biogas slurry through separation of solid and liquid enters ammonia aeration post, the connection of stripping post rear end
Ammonia absorber, the biogas slurry after ammonia aeration enters film nitrator, and inoculation of activated-sludge adds oxidizable external source organic carbon
Source, by the microporous aeration device installed in film nitrator bottom, with certain dissolved oxygen concentration, biogas slurry in maintenance reaction device
Middle ammonium nitrogen changes into nitrate nitrogen under nitrification, it is ensured that effluent quality pH value goes out in subacidity and certain ammonium nitrate nitrogen ratio
Water is to biogas slurry film concentration systems.
2. livestock and poultry farm biogas slurry film concentrates pretreatment system according to claim 1, it is characterised in that：The separation of solid and liquid
Biogas slurry is entered by water pump from the top of ammonia aeration post afterwards, is full of hollow ball filler in the ammonia aeration post, and biogas slurry is through filler from upper
Flow down, while in the bottom of ammonia aeration post by the air blast of blower fan one, carries out gas-liquid exchange in ammonia aeration post, and gas is from ammonia
The top discharge of stripping post enters the removal that ammonia absorber carries out ammonia nitrogen, the top row of ammonia absorber through the air blast of blower fan two from bottom
Go out except the gas of ammonia nitrogen, by blower fan one, air blast enters ammonia aeration post again.
3. livestock and poultry farm biogas slurry film according to claim 1 or claim 2 concentrates pretreatment system, it is characterised in that：Described ammonia
Stripping post is connected with Biogas Generator Set waste heat pressure fan, and heat energy is provided for described ammonia aeration post.
4. livestock and poultry farm biogas slurry film according to claim 1 or claim 2 concentrates pretreatment system, it is characterised in that：Described film
Nitrator is that membrane module is installed in the container of certain volume volume, and membrane module uses hollow-fibre membrane, film silk external diameter 2.4
㎜, the ㎜ of internal diameter 1.0, it is 0.2 μm that it, which retains aperture, and membrane material is polyethylene, as microbe carrier and prevents that inoculating active is dirty
Mudflow loses.
5. a kind of livestock and poultry farm biogas slurry film concentrates pretreatment system according to claim 4, it is characterised in that：Described film
The activated sludge from sewage disposal is inoculated with nitrator, described inoculation of activated-sludge is obtained to be inoculated with nitrobacteria.
6. a kind of livestock and poultry farm biogas slurry film concentrates pretreatment system according to claim 4, it is characterised in that described film
External source easily oxidized organic carbon source is added in nitrator to refer to：Addition glucose, disaccharides, starch, blackstrap class is oxidizable has
Machine carbon, addition is 8~10 times of ammonium nitrogen quantity in biogas slurry in the domestication stage, and operation phase external source easily oxidized organic carbon addition is
1~2 times of ammonium nitrogen quantity.
7. a kind of livestock and poultry farm biogas slurry film concentrates pretreatment system according to claim 4, it is characterised in that described
Film nitrator bottom sets microporous aeration device, with dissolved oxygen concentration in maintenance reaction device between 2~4mg/l.
8. concentrating the processing method of pretreatment system according to any one of claim 1 to the 7 livestock and poultry farm biogas slurry film, press
Following step：
First, it is 5~10 that the biogas slurry of solid and liquid separation, which is pumped to filler ratio of height to diameter in ammonia aeration post, post, in fen：1, meanwhile, ammonia
Stripping post is heated and is 40~50 to stripping running temperature from bottom blast0C, gas-water ratio is 2000~4000：1, from stripping
Post discharges ammonia-containing gas, ammonia nitrogen in biogas slurry is reduced within 1000mg/L；
Second, ammonia nitrogen is reduced to the biogas slurry within 1000mg/L and entered in film nitrator, and ammonium nitrogen is under nitrification in biogas slurry
Change into nitrate nitrogen, it is ensured that effluent quality pH is between 5.5-6.5, ammonium nitrate nitrogen compares NH4-N：NOx- N is 1~10:Between 1；
3rd, ammonia-containing gas enter from ammonia absorber bottom, dilute sulfuric acid solution solution are full of in tower, and fill out filled with irregular shape
Material, the gas discharged through ammonia absorber is again introduced into ammonia aeration post, and gas circulation is utilized.
9. processing method according to claim 8, natural pond is carried out using above-mentioned livestock and poultry farm biogas slurry film concentration pretreatment system 10
Liquid processing, in the steps below：
First, through ammonia aeration, water outlet COD and NH4- N is down to 2650mg/l, 940mg/l respectively；
Second, above-mentioned water outlet is pumped into film nitrator, in 10m3Under/min aeration quantity, temperature is stopped in 28 DEG C and waterpower
Stay the time（HRT）In the case of 24h, addition blackstrap amount is 12kg/d, continuous operation 100 days, and pH value is tieed up always in water outlet
Hold between 5.3-6.4, NH4-N：NOx- N-dimensional holds 1.5~3：Between 1.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111470903A (en) * | 2020-04-30 | 2020-07-31 | 农业部沼气科学研究所 | Concentrated biogas liquid compound fertilizer and method for cultivating vegetables by using same |
| CN114314831A (en) * | 2022-01-25 | 2022-04-12 | 山东民和生物科技股份有限公司 | Method for domesticating engineered high-ammonia nitrogen anaerobic fermentation strain and concentrating fermentation liquor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111470903A (en) * | 2020-04-30 | 2020-07-31 | 农业部沼气科学研究所 | Concentrated biogas liquid compound fertilizer and method for cultivating vegetables by using same |
| CN114314831A (en) * | 2022-01-25 | 2022-04-12 | 山东民和生物科技股份有限公司 | Method for domesticating engineered high-ammonia nitrogen anaerobic fermentation strain and concentrating fermentation liquor |
| CN114314831B (en) * | 2022-01-25 | 2023-02-10 | 山东民和生物科技股份有限公司 | Method for domesticating engineered high-ammonia nitrogen anaerobic fermentation strain and concentrating fermentation liquor |
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Application publication date: 20170919 |