CN107129036A - Improve the method that anaerobic bio-treated produces high-purity methane - Google Patents
Improve the method that anaerobic bio-treated produces high-purity methane Download PDFInfo
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- CN107129036A CN107129036A CN201710333268.0A CN201710333268A CN107129036A CN 107129036 A CN107129036 A CN 107129036A CN 201710333268 A CN201710333268 A CN 201710333268A CN 107129036 A CN107129036 A CN 107129036A
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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
- C02F3/28—Anaerobic digestion processes
- C02F3/286—Anaerobic digestion processes including two or more steps
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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
- C02F3/28—Anaerobic digestion processes
- C02F3/2853—Anaerobic digestion processes using anaerobic membrane bioreactors
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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
- C02F2209/36—Biological material, e.g. enzymes or ATP
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The present invention provides a kind of method for improving anaerobic bio-treated production high-purity methane, and this method includes eight steps, and available gas methane content is 80 85%, 1kgCOD conversion of methane 0.4m in final gained biogas3It is 1kgCOD conversion of methane 0.35m more than calculated value3.The effect of the present invention is that this method provides high-quality, stable living environment by improving the biological concentration of anaerobe and production of high purity methane of making a living in anaerobic bio-treated, to improve the organic matter capacity of decomposition of anaerobe, organic pollution efficient-decomposition in high concentrated organic wastewater is converted into biogas, active ingredient methane content is high in biogas, water outlet COD is significantly reduced, technological process is simple, safe and stable, processing cost is low, and floor space is small.Hydraulic detention time is short, and sludge output is low, and organic matter decomposition rate is high, and biogas output is high, and available gas methane content is high in biogas, and COD clearances are high.
Description
Technical field
The method that anaerobic bio-treated produces high-purity methane is improved the present invention relates to a kind of.
Background technology
Anaerobic bio-treated be using anaerobe metabolic process in the case where oxygen need not be provided, in water
Organic pollution is converted into inorganic matter and a small amount of cellular material, these inorganic matters mainly include biogas and water, biogas it is main
Composition is methane and carbon dioxide.
In anaerobic digestion process, the metabolic process of a variety of different microorganisms is influenced each other, disturbed, and is formd extremely complex
Biochemical process.Three phases are generally divided into, the first stage in the presence of hydrolysis and zymogenous bacteria, makes carbohydrate, egg
White matter and fat splitting and fermentation, are converted into monose, amino acid, aliphatic acid, glycerine, CO2 and hydrogen etc.；Second stage is in production hydrogen production
In the presence of acetic acid bacteria, the product of first stage is changed into hydrogen, CO2 and acetic acid etc.；Phase III, by two groups physiologically not
Under the effect of the same methanogen, one group is converted into methane hydrogen and CO2, and another group produces methane to acetic acid decarboxylation.
Acidogenic bactria and hydrogen-producing acetogenic bacteria are hydrolyzed, not methanogen is can be collectively referred to as, it includes anaerobic bacteria and facultative
Bacterium, it is especially in the majority with facultative bacteria.Compared with methanogen, methanogen is not to external environments such as pH value, temperature, anaerobic conditions
The change of factor has stronger adaptability, and its growth rate is fast.And methanogen is that a group is very special, strictly anaerobic
Bacterium, their requirements to environmental condition are more tightened up than not methanogen, and methanogen growth is very slow, artificial
Under condition of culture, even bacterium colony can be just grown within tens days by more than ten days；It is even longer under field conditions (factors)；And methane phase
Phase generation of the breeding of bacterium is longer.Therefore, methanogen is the major microorganisms for determining anaerobic digestion transformation efficiency and success or failure, most
The quality and density of methanogen are to influence the key factor of anaerobic digestion conversion ratio and methane production in latter stage.
In recent years, with the high speed development of industry, agricultural and animal husbandry, at present, the waste water of industrial production discharge, animal husbandry
Breeding wastewater of discharge etc., most of is high concentrated organic wastewater, and COD contents are high.For example, breeding wastewater COD contents are 12000
~60000mg/L, COD of waste leachate content is 14000~20000mg/L., will if high concentrated organic wastewater is directly discharged
Serious pollution is caused to water environment.And the growing tension of the energy, the processing method of anaerobe, which has, reduces pollution
Simultaneously can also output Methane Resources the characteristics of, it is in widespread attention.
But, because methanogen is stricter to environmental requirement, the generation cycle is long, and growth and breeding is slow.At present, generally transport
The good anaerobic digester system of row, about 60%~70% organic substance is converted into first in biogas, biogas after anaerobic digestion
Alkane content is 55%~65%.Improve the yield of methane, it is necessary to keep higher microorganism concn, longer sludge age and
Shorter hydraulic detention time, at the same time provides high-quality, stable living environment for methanogen, methanogen is existed
Had the advantage in anaerobe status, increase the yield of methane.
The content of the invention
For the deficiency in structure in the prior art, anaerobic bio-treated production is improved it is an object of the invention to provide one kind
The method of high-purity methane, for low, the effective gas in biogas that solves the biogas output that anaerobic bio-treated in the prior art is present
The problem of body methane content is low.
To achieve the above object, the present invention provides a kind of method for improving anaerobic bio-treated production high-purity methane, should
Method uses anaerobic biological reactor+anaerobism MBR membrane bioreactors (AnMBR)+gas-liquid separator+water seal can system, described
Anaerobic biological reactor is the chamber of closing, and anaerobic biological reactor is interior to include air storage chamber, agitator, with water distributor, exhaust
Mouth one, exhaust outlet two, exhaust outlet three and instrumentation, instrumentation include thermometer, PH meters, ORP meters, MLSS meters；It is described to detest
Oxygen MBR membrane bioreactors (AnMBR) for closing chamber, in anaerobism MBR membrane bioreactors (AnMBR) comprising exhaust outlet,
Air inlet, MBR membrane bioreactors, aerating pipelines, thermometer, liquid level gauge；Wherein：This method comprises the following steps：
Step one：High concentrated organic wastewater by COD scopes in 12000~60000mg/L is conveyed by water pump, and feeding is detested
Oxygen bioreactor bottom match somebody with somebody water distributor；
Step 2：The high concentrated organic wastewater sent into through step one, the work of anaerobe in anaerobic biological reactor
Anaerobic digestion is carried out under, by hydrolysis, acidifying and methane phase three phases the organic matter in the high concentrated organic wastewater
Biogas is converted into, the organic matter in the high concentrated organic wastewater is converted into by hydrolysis, acidifying and methane phase three phases
Biogas, biogas is rich in methane and carbon dioxide, in the methane phase stage methanogen be using hydrolysis stage and the product of acidifying as
Matrix is converted into methane by different paths；High concentrated organic wastewater forms anaerobic digestion solution after being digested through microbiological anaerobic,
Contain anaerobe in digestive juice；The important intermediate of anaerobic digestion reaction is volatile fatty acid (VFA), volatility fat
Fat acid (VFA) is the matrix of methanogen growth metabolism；Methanogen influences the transformation efficiency and methane production of anaerobic digestion；Production
Methane backeria is strict to living environment requirement, and in anaerobic biological reactor, temperature range is 35~37 DEG C, and PH scopes are 6.8~
7.1, ORP scopes are -280--350mv, and volatile fatty acid (VFA) scope is 280~400mg/L；
Step 3：The mixed liquor of anaerobic digestion solution and high concentrated organic wastewater in step 2 anaerobic biological reactor, leads to
The outlet crossed at anaerobic biological reactor bottom 3/4, is delivered in anaerobism MBR membrane bioreactors (AnMBR) by the road,
Mixed liquor continues through anaerobic digestion in anaerobism MBR membrane bioreactors (AnMBR) and produces biogas, anaerobism MBR membrane bioreactions
The interior temperature range control of device (AnMBR) is answered at 35~37 DEG C；Liquid level gauge and step one in anaerobism MBR membrane reactors (AnMBR)
In water pump linkage, the start and stop of water pump are controlled by volumetric loading, i.e., when the liquid level of anaerobism MBR membrane reactors (AnMBR) is low
When the low liquid level of setting, starting mode of pump operates to anaerobic biological reactor conveying high concentrated organic wastewater, when anaerobism MBR films are anti-
When answering the liquid level of device (AnMBR) to reach the high level of setting, water pump is out of service；
Step 4：Through step 2 anaerobic digestion produce biogas, part biogas by anaerobic biological reactor exhaust outlet one
It is delivered to by the road on the aerating pipelines of MBR membrane reactors bottom in anaerobism MBR membrane bioreactors (AnMBR), transfer pipeline
Methane air blower is set, and biogas is gone out after being pressurizeed through methane air blower from aerating pipelines washes away MBR membrane bioreactors；
Step 5：Through the biogas in step 4 feeding anaerobism MBR membrane bioreactors (AnMBR) and through step 2 anaerobism
The biogas that the interior anaerobic digestion of MBR membrane bioreactors (AnMBR) is produced is risen on anaerobism MBR membrane bioreactors (AnMBR)
Portion；The exhaust outlet on anaerobism MBR membrane bioreactors (AnMBR) top passes through pipe with the exhaust outlet two on anaerobic biological reactor top
Road is connected, and biogas circulates between anaerobic biological reactor and anaerobism MBR membrane bioreactors (AnMBR), is recycled；It is described
The height of exhaust outlet two is slightly below exhaust outlet one；
Step 6：The mixed liquor sent into through step 3, through MBR membrane bioreactions in anaerobism MBR membrane bioreactors (AnMBR)
Answer the Chinese effluent after device filtering to gas-liquid separator, the biogas gone out through gas-liquid separator separates returns to anaerobism MBR membrane bioreactions
Answer the air inlet on device (AnMBR) top；The liquid COD contents gone out through gas-liquid separator separates are 280~300mg/L, to environment
Still there is pollution, it is necessary to which the municipal wastewater pipeline being emitted into outside the system, enters after being collected through city planting ductwork into sewage treatment plant
The follow-up sewage treatment process of row；
Step 7：The mixed liquor sent into through step 3, through MBR membrane bioreactions in anaerobism MBR membrane bioreactors (AnMBR)
The filtering of device is answered, anaerobe is trapped within anaerobism MBR membrane bioreactors (AnMBR), is formed and is rich in anaerobe
Anaerobic digestion solution, include methanogen in anaerobe, anaerobic digestion solution is from anaerobism MBR membrane bioreactors (AnMBR)
Bottom discharge, through water pump convey be back to anaerobic biological reactor match somebody with somebody water distributor；It is anti-that methanogen is back to anaerobic organism
Answer in device, MLSS scopes are 80~120g/ in the concentration of methanogen, anaerobic biological reactor in increase anaerobic biological reactor
L；Anaerobic digestion solution and MBR membrane bioreactions in anaerobic biological reactor are back in anaerobism MBR membrane bioreactors (AnMBR)
The flow-rate ratio for answering the water outlet of device filtering is 3:1；Anaerobism MBR membrane bioreactors (AnMBR) interior sludge age is up to 180 days~300
My god；
Step 8：Through anaerobism in step 2 anaerobic biological reactor and step 3 anaerobism MBR membrane bioreactors (AnMBR)
The biogas produced after digestion, collection is discharged by the floss hole three at the top of anaerobic biological reactor after water sealed tank；The exhaust
The height of mouth three is higher than exhaust outlet one and exhaust outlet two.
The effect of the present invention is by using anaerobic biological reactor+anaerobism MBR membrane bioreactors (AnMBR)+gas-liquid
Separator+water seal can system, the anaerobic biological reactor for closing chamber, in anaerobic biological reactor comprising air storage chamber,
Agitator, with water distributor, exhaust outlet one, exhaust outlet two, exhaust outlet three and instrumentation, instrumentation includes thermometer, PH
Meter, ORP meters, MLSS meters；The anaerobism MBR membrane bioreactors (AnMBR) are the chamber of closing, anaerobism MBR membrane biological reactions
Exhaust outlet, air inlet, MBR membrane bioreactors, aerating pipelines, thermometer, liquid level gauge are included in device (AnMBR).MBR UF membranes
Technology possesses the characteristic of high, the longer sludge age of microorganism concn and shorter hydraulic detention time, and traditional biological is handled into skill
Art is combined with MBR membrane separation techniques.By improving in anaerobic bio-treated the biological concentration of anaerobe and detesting for advantage
Oxygen animalcule methanogen provides high-quality, stable living environment, to improve the organic matter capacity of decomposition of anaerobe, high
Organic pollution efficient-decomposition in concentration organic wastewater is converted into active ingredient methane content height, water outlet COD in biogas, biogas
Significantly reduce, technological process is simple, safe and stable, processing cost is low, and floor space is small.Waterpower is stopped in anaerobe reaction
Stay the time short, microorganism concn is high, sludge sludge age is long, wherein methanogen is dominant bacteria, other bacteriums are inferior position bacterium；Anaerobism is micro-
Biotransformation efficiency is high, and available gas methane content is high in biogas, and methane contains 80-85%, and carbon dioxide contains 20~15%, vulcanization
Hydrogen is extremely low, less than 10ppm；1kgCOD conversion of methane 0.4m3It is 1kgCOD conversion of methane 0.35m better than calculated value3；
Chinese effluent COD is substantially reducing at 280~300mg/L.
Brief description of the drawings
Fig. 1 is that the raising anaerobic bio-treated of the present invention produces the method flow schematic diagram of high-purity methane.
Embodiment
The method to the raising anaerobic bio-treated production high-purity methane of the present invention is illustrated in conjunction with the embodiments.
The method design philosophy that the present invention improves anaerobic bio-treated production high-purity methane is based upon using anaerobism
Bioreactor+anaerobism MBR membrane bioreactors (AnMBR)+gas-liquid separator+water seal can system, the anaerobic organism reaction
Device is the chamber of closing, and anaerobic biological reactor is interior to include air storage chamber, agitator, with water distributor, exhaust outlet one, exhaust outlet
2nd, exhaust outlet three and instrumentation, instrumentation include thermometer, PH meters, ORP meters, MLSS meters；The anaerobism MBR films are biological
Reactor (AnMBR) is the chamber of closing, and anaerobism MBR membrane bioreactors (AnMBR) are interior to include exhaust outlet, air inlet, MBR films
Bioreactor, aerating pipelines, thermometer, liquid level gauge.MBR membrane separation techniques possess high, the longer sludge age of microorganism concn
The characteristic of shorter hydraulic detention time, traditional biological treatment technology is combined with MBR membrane separation techniques.Detested by improving
In oxygen biological treatment the biological concentration of microorganism and provide high-quality for advantage anaerobe methanogen, stable existence ring
Border, to improve the organic matter capacity of decomposition of anaerobe, turns the organic pollution efficient-decomposition in high concentrated organic wastewater
Active ingredient methane content height in biogas, biogas is turned to, water outlet COD is significantly reduced, technological process is simple, safe and stable, processing
Cost is low, and floor space is small.
As shown in figure 1, the present invention improves the method that anaerobic bio-treated produces high-purity methane, this method is given birth to using anaerobism
Thing reactor+anaerobism MBR membrane bioreactors (AnMBR)+gas-liquid separator+water seal can system, the anaerobic biological reactor
For the chamber of closing, in anaerobic biological reactor comprising air storage chamber, agitator, with water distributor, exhaust outlet one, exhaust outlet two,
Exhaust outlet three and instrumentation, instrumentation include thermometer, PH meters, ORP meters, MLSS meters；The anaerobism MBR membrane biological reactions
Device (AnMBR) is the chamber of closing, and anaerobism MBR membrane bioreactors (AnMBR) are interior to include exhaust outlet, air inlet, and MBR films are biological
Reactor, aerating pipelines, thermometer, liquid level gauge；This method comprises the following steps：
Step one：High concentrated organic wastewater by COD scopes in 12000~60000mg/L is conveyed by water pump 1, feeding
The bottom of anaerobic biological reactor 3 match somebody with somebody water distributor 4.Electromagnetic flowmeter 2 is installed, for measuring amount of inlet water on inlet pipeline.
Step 2：The high concentrated organic wastewater sent into through step one, the work of anaerobe in anaerobic biological reactor
Anaerobic digestion is carried out under, by hydrolysis, acidifying and methane phase three phases the organic matter in the high concentrated organic wastewater
Biogas is converted into, the organic matter in the high concentrated organic wastewater is converted into by hydrolysis, acidifying and methane phase three phases
Biogas, biogas is rich in methane and carbon dioxide, in the methane phase stage methanogen be using hydrolysis stage and the product of acidifying as
Matrix is converted into methane by different paths；High concentrated organic wastewater forms anaerobic digestion solution after being digested through microbiological anaerobic,
Contain anaerobe in digestive juice；The important intermediate of anaerobic digestion reaction is volatile fatty acid (VFA), volatility fat
Fat acid (VFA) is the matrix of the growth metabolism of methane-producing bacteria, the transformation efficiency of methanogen influence anaerobic digestion and methane production
Amount；Methanogen is strict to living environment requirement, and anaerobic digestion reaction is mesophilic digestion, temperature range in anaerobic biological reactor
It is 35~37 DEG C；Acid-base value in PH meter detection reactors, PH scopes are 6.8~7.1；ORP meter detection reactor internal oxidition reduction
Current potential, ORP scopes are -280--350mv；Volatile fatty acid (VFA) concentration is the necessary condition that guarantee system is normally run,
But too high VFA can suppress the growth of methane backeria, so that digestion process is destroyed, volatile fatty acid model in anaerobic biological reactor
It is 280~400mg/L to enclose；By the control of said temperature, PH, ORP, VFA indices, high-quality is provided for methanogen, steady
Fixed living environment, to improve the transformation efficiency of organic matter in high concentrated organic wastewater, improves the yield of methane.
The biogas that the storage anaerobe anaerobic digestion reaction of air storage chamber 6 at the top of anaerobic biological reactor 3 is produced, anaerobism
High concentrated organic wastewater in the stirring anaerobic biological reactor 3 of agitator 5 of the bottom of bioreactor 3, makes high concentration organic waste
Water is uniformly distributed with anaerobe, fully contact, improves the degradation efficiency of organic matter.
Step 3：The mixed liquor of anaerobic digestion solution and high concentrated organic wastewater in step 2 anaerobic biological reactor 3, leads to
The outlet 12 crossed at the bottom 3/4 of anaerobic biological reactor 3, is delivered to anaerobism MBR membrane bioreactors (AnMBR) by the road
In 15, mixed liquor continues through anaerobic digestion in anaerobism MBR membrane bioreactors (AnMBR) 15 and produces biogas, anaerobism MBR films
Temperature range control is at 35~37 DEG C in bioreactor (AnMBR) 15；Liquid level in anaerobism MBR membrane reactors (AnMBR) 15
Meter links with the water pump 1 in step one, the start and stop of water pump 1 is controlled by volumetric loading, i.e., when anaerobism MBR membrane reactors
(AnMBR) when 15 liquid level is less than the low liquid level set, the startup optimization of water pump 1 is that the conveying of anaerobic biological reactor 3 high concentration has
Machine waste water, when the liquid level of anaerobism MBR membrane reactors (AnMBR) 15 reaches the high level of setting, water pump 1 is out of service.
Step 4：Through step 2 anaerobic digestion produce biogas, part biogas by anaerobic biological reactor 3 exhaust outlet one
9 are delivered to the aerating pipelines 17 of the bottom of MBR membrane reactors 16 in anaerobism MBR membrane bioreactors (AnMBR) 15 by the road, conveying
Set methane air blower 14, biogas to be gone out after being pressurizeed through methane air blower 14 from aerating pipelines 17 on pipeline and wash away MBR films biology
Reactor 16；
Above-mentioned MBR membrane bioreactors are by the way of biogas is combined with water and washed away, it is necessary to the supercharging of methane air blower, energy
Consumption is high.Alternative, using ultrasonic cleaning equipment.Ultrasonic wave cleaning is to send high-frequency oscillation signal by supersonic generator,
High-frequency oscillation signal is converted into high frequency machinery vibration by transducer and traveled in medium, utilizes the sky of ultrasonic wave in a liquid
Change effect, acceleration effect and direct flow effect directly, are indirectly acted on liquid and dirt, crud layer disperseed, emulsified,
Peel off and reach cleaning purpose.
Step 5：Through the biogas in step 4 feeding anaerobism MBR membrane bioreactors (AnMBR) 15 and through step 2 anaerobism
The biogas that anaerobic digestion is produced in MBR membrane bioreactors (AnMBR) 15 rises to anaerobism MBR membrane bioreactors (AnMBR)
15 tops.The exhaust outlet 18 on the top of anaerobism MBR membrane bioreactors (AnMBR) 15 and the exhaust on the top of anaerobic biological reactor 3
Mouth 27 is connected by pipeline, and biogas flows between anaerobic biological reactor 3 and anaerobism MBR membrane bioreactors (AnMBR) 15
It is logical, recycle；The height of the exhaust outlet 27 is slightly below exhaust outlet 1；
Step 6：The anaerobic digestion solution sent into through step 3, through MBR films in anaerobism MBR membrane bioreactors (AnMBR) 15
Chinese effluent after the filtering of bioreactor 16 is to gas-liquid separator 21, and the biogas 22 isolated through gas-liquid separator 21, which is returned to, to be detested
The air inlet 19 on the top of oxygen MBR membrane bioreactors (AnMBR) 15；The liquid 23COD contents isolated through gas-liquid separator 21
For 280~300mg/L, still there is pollution to environment, it is necessary to which the municipal wastewater pipeline being emitted into outside the system, is received through city planting ductwork
Enter sewage treatment plant after collection and carry out follow-up sewage treatment process.The outlet pipe of anaerobism MBR membrane bioreactors (AnMBR) 15
Electromagnetic flowmeter 20 is installed, for measuring water outlet water on road.
Step 7：The mixed liquor sent into through step 3, it is biological through MBR films in anaerobism MBR membrane bioreactors (AnMBR) 15
The filtering of reactor 16, anaerobe is trapped within anaerobism MBR membrane bioreactors (AnMBR) 15, is formed and is rich in anaerobism
Methanogen is included in the anaerobic digestion solution of microorganism, anaerobe, anaerobic digestion solution is from anaerobism MBR membrane bioreactors
(AnMBR) 15 bottoms discharge, through water pump 13 convey be back to anaerobic biological reactor 3 match somebody with somebody water distributor 4；Methanogen flows back
Into anaerobic biological reactor, MLSS models in the concentration of methanogen, anaerobic biological reactor in increase anaerobic biological reactor
It is 80~120g/L to enclose；The anaerobism being back in anaerobism MBR membrane bioreactors (AnMBR) 15 in anaerobic biological reactor 3 disappears
The flow-rate ratio for changing the water outlet that liquid is filtered with MBR membrane bioreactors is 3:1；There is MBR membrane bioreactors efficient retention to make
With making anaerobe be completely trapped in anaerobism MBR membrane bioreactors (AnMBR) 15, can realize that anaerobism MBR films are biological
The hydraulic detention time (HRT) of reactor (AnMBR) 15 and sludge age (SRT's) is kept completely separate, and sludge age is up to 180 days~300
My god, beneficial to the retention and breeding of methanogen；Have by improving microorganism concn, increase sludge age to improve anaerobic digestion reaction
The transformation efficiency of machine thing.
Step 8：Through in step 2 anaerobic biological reactor 3 and step 3 anaerobism MBR membrane bioreactors (AnMBR) 15
The biogas produced after anaerobic digestion, collection is discharged by the floss hole 38 at the top of anaerobic biological reactor 3 after water sealed tank 10；
Biogas flowmeter 11 is installed, for measuring biogas output on firedamp drainage pipeline；The water sealed tank 10, plays back-fire relief in systems
The effect of device, anti-locking system tempering, stable biogas air pressure；The height of the exhaust outlet 38 is higher than exhaust outlet 1 and exhaust outlet two
7；Available gas methane content is 80-85%, 1kgCOD conversion of methane 0.4m in collected biogas3It is more than calculated value
1kgCOD conversion of methane 0.35m3。
Concentration of anaerobic microorganisms in anaerobic biological reactor 3 and anaerobism MBR membrane bioreactors (AnMBR) 15 is high, its
In main anaerobe methanogen be dominant bacteria, other bacteriums are inferior position bacterium, and anaerobe reaction efficiency is high, 1kgCOD
Conversion of methane 0.4m3It is 1kgCOD conversion of methane 0.35m better than calculated value3；Available gas methane content in the biogas of collection
Height, methane contains 80-85%, and carbon dioxide contains 20~15%, and hydrogen sulfide gas is extremely low, less than 10ppm.
Claims (1)
1. a kind of improve the method that anaerobic bio-treated produces high-purity methane, this method uses anaerobic biological reactor+anaerobism
MBR membrane bioreactors (AnMBR)+gas-liquid separator+water seal can system, the anaerobic biological reactor is the chamber of closing,
Comprising air storage chamber, agitator, with water distributor, exhaust outlet one, exhaust outlet two, exhaust outlet three and detection in anaerobic biological reactor
Instrument, instrumentation includes thermometer, PH meters, ORP meters, MLSS meters；The anaerobism MBR membrane bioreactors (AnMBR) are envelope
Exhaust outlet, air inlet, MBR membrane bioreactors, aeration tube are included in the chamber closed, anaerobism MBR membrane bioreactors (AnMBR)
Road, thermometer, liquid level gauge；
It is characterized in that：This method comprises the following steps：
Step one：High concentrated organic wastewater by COD scopes in 12000~60000mg/L is conveyed by water pump, feeding anaerobism life
Thing reactor bottom match somebody with somebody water distributor；
Step 2：The high concentrated organic wastewater sent into through step one, in anaerobic biological reactor in the presence of anaerobe
Anaerobic digestion is carried out, the organic matter in the high concentrated organic wastewater is converted by hydrolysis, acidifying and methane phase three phases
For biogas, biogas is rich in methane and carbon dioxide, and methanogen is the product with hydrolysis stage and acidifying in the methane phase stage
Methane is converted into by different paths for matrix；High concentrated organic wastewater forms anaerobic digestion after being digested through microbiological anaerobic
Contain anaerobe in liquid, digestive juice；The important intermediate of anaerobic digestion reaction is volatile fatty acid (VFA), volatilization
Property aliphatic acid (VFA) is the matrix of methanogen growth metabolism；The transformation efficiency of methanogen influence anaerobic digestion and methane production
Amount；Methanogen is strict to living environment requirement, and in anaerobic biological reactor, temperature range is 35~37 DEG C, and PH scopes are 6.8
~7.1, ORP scope are -280--350mv, and volatile fatty acid (VFA) scope is 280~400mg/L；
Step 3：The mixed liquor of anaerobic digestion solution and high concentrated organic wastewater in step 2 anaerobic biological reactor, by away from
From the outlet at anaerobic biological reactor bottom 3/4, it is delivered in anaerobism MBR membrane bioreactors (AnMBR), mixes by the road
Liquid continues through anaerobic digestion in anaerobism MBR membrane bioreactors (AnMBR) and produces biogas, anaerobism MBR membrane bioreactors
(AnMBR) interior temperature range control is at 35~37 DEG C；In liquid level gauge and step one in anaerobism MBR membrane reactors (AnMBR)
Water pump is linked, and the start and stop of water pump are controlled by volumetric loading, i.e., set when the liquid level of anaerobism MBR membrane reactors (AnMBR) is less than
During fixed low liquid level, starting mode of pump operates to anaerobic biological reactor conveying high concentrated organic wastewater, when anaerobism MBR membrane reactors
(AnMBR) when liquid level reaches the high level of setting, water pump is out of service；
Step 4：The biogas produced through step 2 anaerobic digestion, part biogas is by the exhaust outlet of anaerobic biological reactor once pipe
Road is delivered on the aerating pipelines of MBR membrane reactors bottom in anaerobism MBR membrane bioreactors (AnMBR), transfer pipeline and set
Methane air blower, biogas is gone out after being pressurizeed through methane air blower from aerating pipelines washes away MBR membrane bioreactors；
Step 5：Through the biogas in step 4 feeding anaerobism MBR membrane bioreactors (AnMBR) and through step 2 anaerobism MBR films
The biogas that the interior anaerobic digestion of bioreactor (AnMBR) is produced rises to anaerobism MBR membrane bioreactors (AnMBR) top；Detest
The exhaust outlet and the exhaust outlet two on anaerobic biological reactor top on oxygen MBR membrane bioreactors (AnMBR) top are connected by pipeline
Connect, biogas circulates between anaerobic biological reactor and anaerobism MBR membrane bioreactors (AnMBR), recycle；The exhaust
The height of mouth two is slightly below exhaust outlet one；
Step 6：The mixed liquor sent into through step 3, through MBR membrane bioreactors in anaerobism MBR membrane bioreactors (AnMBR)
Chinese effluent after filtering is to gas-liquid separator, and the biogas gone out through gas-liquid separator separates returns to anaerobism MBR membrane bioreactors
(AnMBR) air inlet on top；The liquid COD contents gone out through gas-liquid separator separates are 280~300mg/L, are still had to environment
Pollution is, it is necessary to which the municipal wastewater pipeline being emitted into outside the system, enters after being collected through city planting ductwork after sewage treatment plant's progress
Continuous sewage treatment process；
Step 7：The mixed liquor sent into through step 3, through MBR membrane bioreactors in anaerobism MBR membrane bioreactors (AnMBR)
Filtering, anaerobe is trapped within anaerobism MBR membrane bioreactors (AnMBR), forms detesting rich in anaerobe
Methanogen is included in oxygen digestive juice, anaerobe, anaerobic digestion solution is from anaerobism MBR membrane bioreactors (AnMBR) bottom
Discharge, through water pump convey be back to anaerobic biological reactor match somebody with somebody water distributor；Methanogen is back to anaerobic biological reactor
In, MLSS scopes are 80~120g/L in the concentration of methanogen, anaerobic biological reactor in increase anaerobic biological reactor；Detest
Anaerobic digestion solution and MBR membrane bioreactors in anaerobic biological reactor are back in oxygen MBR membrane bioreactors (AnMBR)
The flow-rate ratio of the water outlet of filtering is 3:1；Anaerobism MBR membrane bioreactors (AnMBR) interior sludge age is up to 180 days~300 days；
Step 8：Through anaerobic digestion in step 2 anaerobic biological reactor and step 3 anaerobism MBR membrane bioreactors (AnMBR)
The biogas produced afterwards, collection is discharged by the floss hole three at the top of anaerobic biological reactor after water sealed tank；The exhaust outlet three
Height be higher than exhaust outlet one and exhaust outlet two.
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| CN111115813A (en) * | 2020-03-16 | 2020-05-08 | 李靖 | Biological anaerobic multi-membrane reactor |
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Application publication date: 20170905 |