CN110183029A - A kind of apparatus and method converting organic wastewater to acetic acid - Google Patents
A kind of apparatus and method converting organic wastewater to acetic acid Download PDFInfo
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Abstract
The invention discloses a kind of apparatus and method for converting organic wastewater to acetic acid, which includes a UASB reactor, a microorganism electrolysis cell, an electrolytic cell and a power supply, and power supply is used to apply voltage to microorganism electrolysis cell and electrolytic cell；Methane is converted by organic wastewater in UASB reactor, methane inputs electrolytic cell；The water outlet of UASB reactor enters microorganism electrolysis cell, and under the action of the electroactive microorganism being added in advance, the organic matter in water outlet is converted into hydrogen, and hydrogen inputs electrolytic cell；In electrolytic cell, with oxidation state anthraquinone -2,6- disulfonate or/and Fe3+To mediate, the methane and hydrogen being passed through are converted into acetic acid under the action of electroactive anaerobic methane nutrition archaeal and thermophilic Hydrogen methanogen.The present invention, which is realized, converts acetic acid for organic wastewater, has not only handled waste water but also has obtained chemical products acetic acid, has provided new way for organic wastewater is effectively treated, all have great importance to energy-saving and emission-reduction and environmental improvement.
Description
Technical field
The present invention relates to a kind of apparatus and method for converting organic wastewater to acetic acid, belong to organic wastewater and carbon dioxide
Application technology as the second resource field.
Background technique
The energy, environment and water resource are bases for the survival of mankind.Recently as fossil fuel, especially petroleum and
The rapid growth of Natural gas consumption triggers global energy crisis.In addition, what fossil fuel discharged in use
A large amount of CO2It can cause greenhouse effects, lead to climate warming.In addition, people produce largely in daily life, production process
Organic sewage.Currently, the sewage disposal technology being widely used is mainly Aerobic biological process, wherein being with activated sludge process again
It is main.However, Wastewater Treated by Activated Sludge Process sewage energy consumption is high, meanwhile, activated sludge process also generates a large amount of sludge, and to the place of sludge
Reason is also required to very high expense.Organic matter in sewage is both pollutant, while also energy content, can pass through resource utilization
Mode removes.How carbon dioxide, organic wastewater is changed into fuel and chemical products, can not only solve environmental problem but also be able to achieve
Sustainable development, this has become countries in the world scientist and makes great efforts the problem of exploring.
Acetic acid is a kind of important chemical products, is living and is having a wide range of applications in industrial production.Currently, acetic acid is raw
Production method mainly have aerobic fermentation method, anaerobic fermentation method, microorganism single carbon synthetic method, methanol carbonylation, acetaldehyde oxidation and
Ethylene method.The reaction principle of aerobic fermentation method is C2H5OH+O2→CH3COOH+H2O；The reaction principle of anaerobic fermentation method is
C6H12O6→3CH3COOH；The reaction principle of microorganism single carbon synthetic method is 2CO2+4H2→CH3COOH+2 H2O、2CO+2H2→
CH3COOH；The reaction principle of methanol carbonylation is CH3OH+CO→CH3COOH；The reaction principle of acetaldehyde oxidation is
2CH3CHO+O2→2CH3COOH。
The above method has that processing cost is high, needs noble metal catalyst, the disadvantages of energy consumption is high and environment friendly is poor.
Summary of the invention
The object of the present invention is to provide a kind of apparatus and method for converting organic wastewater to acetic acid, the present invention has in processing
Chemical products acetic acid can also be obtained while machine waste water, new way is provided for organic wastewater is effectively treated, to energy-saving and emission-reduction
All have great importance with environmental improvement.
A kind of device converting organic wastewater to acetic acid provided by the invention mainly includes a UASB reactor, one micro-
Biological electrolytic cell, an electrolytic cell and a power supply, power supply are used to apply voltage to the yin-yang interpolar of microorganism electrolysis cell and electrolytic cell；
Methane is converted by organic wastewater in UASB reactor, methane inputs electrolytic cell by pipeline；
The water outlet of UASB reactor enters microorganism electrolysis cell, under the action of the electroactive microorganism being added in advance, out
Organic matter in water is converted into hydrogen, and hydrogen inputs electrolytic cell by pipeline；
In electrolytic cell, with oxidation state anthraquinone -2,6- disulfonate or/and Fe3+To mediate, the methane and hydrogen being passed through are in electricity
Acetic acid is converted under the action of active anaerobic methanotrophic archaeal and thermophilic Hydrogen methanogen.
Further, it is connected with water inlet pipe, sewage pipe, downtake pipe, the first outlet pipe on the UASB reactor,
The first outlet pipe, second exhaust pipe, the second outlet pipe, i.e. the first outlet pipe are connected on the microorganism electrolysis cell
Both ends be separately connected UASB reactor and microorganism electrolysis cell；
Air inlet pipe, third exhaust pipe are connected on the electrolytic cell；
The air inlet port of the air outlet and air inlet pipe of downtake pipe and second exhaust pipe connects, and is used to first exhaust
Pipe and the gas of second exhaust pipe discharge are imported into electrolytic cell.
Further, microorganism electrolysis cell and anode electrode in the electrolytic cell and cathode electrode be carbon cloth electrode,
Grain graphite electrode, reticulated vitreous carbon electrodes, seed activity carbon resistance rod or carbon fiber brush electrode.
Preferably, the cathode electrode in microorganism electrolysis cell and the electrolytic cell is the carbon after noble metal catalyst modification
Cloth electrode, granular graphite electrode, reticulated vitreous carbon electrodes, seed activity carbon resistance rod or carbon fiber brush electrode.
A kind of method converting acetic acid for organic wastewater provided by the invention, using above-mentioned apparatus, comprising:
(1) start UASB reactor:
Using the anaerobic activated sludge of sewage treatment plant as inoculum, using the first heavy overflowing liquid of sewage treatment plant as culture medium,
UASB reactor, 37C constant temperature incubation, when UASB reactor persistently generates methane, i.e. UASB reactor are inoculated with after pure nitrogen gas deoxygenation
Start completion；
(2) start microorganism electrolysis cell:
Using the anaerobic activated sludge of sewage treatment plant as inoculum, using the first heavy overflowing liquid of sewage treatment plant as culture medium,
Pure nitrogen gas removes oxygen microbe inoculation electrolytic cell, microorganism electrolysis cell applied voltage, 37C constant temperature incubation, every 3-7 days with fresh
Deoxidation waste water displacement microorganism electrolysis cell in 70% liquid, when the electric current of microorganism electrolysis cell reaches maximum and stablizes,
That is microorganism electrolysis cell start completion；
(3) organic wastewater is converted into the technique of acetic acid, and the technique is in UASB reactor and microorganism electrolysis cell start completion
It carries out afterwards:
Organic wastewater continuously inputs in UASB reactor, and the methane generated in UASB reactor enters electrolytic cell；
The water outlet of UASB reactor enters microorganism electrolysis cell, the H generated in microorganism electrolysis cell2Into electrolytic cell；
Electrolytic cell is provided with the culture medium of deoxidation, and electroactive anaerobic methane nutrition archaeal is accessed in culture medium and thermophilic Hydrogen produces
Methane backeria；In electrolytic cell, with oxidation state anthraquinone -2,6- disulfonate or/and Fe3+To mediate, the methane and hydrogen being passed through are in electricity
Acetic acid is converted under the action of active anaerobic methanotrophic archaeal and thermophilic Hydrogen methanogen.
Further, startup stage and organic wastewater transformation stage, by cathode electrode in microorganism electrolysis cell and electrolytic cell
Current potential is set as -0.3V- -2.0V.The current potential is the current potential of relative standard's hydrogen electrode.
Further, electroactive anaerobic methane nutrition archaeal uses Methanosarcina acetivorans strain
C2A。
Thermophilic Hydrogen methanogen refers to can be with H2And/or CO2For the methanogen of nutrition.Further, thermophilic Hydrogen methanogen
Using Methanococcus maripaludis.
Further, culture medium is 141 culture medium of DSMZ Medium, 141 culture medium of DSMZ Medium in electrolytic cell
Ingredient are as follows:
KCl 0.34g/L；MgCl2·6H2O 4.00g/L；MgSO4·7H2O 3.45g/L；NH4Cl 0.25g/L；
CaCl2·2H2O 0.14g/L；K2HPO40.49g/L；NaCl 18.00g/L；Fe (the NH of mass-volume concentration 0.1%4)2
(SO4)·6H2O solution 2mL/L；Methanol 3.20g/L；Sodium formate 3.40g/L；Yeast extract 2.00g/L；Peptone 2.00g/
L；The resazurin solution 0.50mL/L of mass-volume concentration 0.1%；NaHCO35.00g/L；Trace element solution 10mL/L；It is micro-
Measure vitamin 10.00mL/L；One water L-cysteine hydrochloride 0.50g/L；Na2S·9H2O 0.50g/L；Deionized water
1000.00mL/L；
Wherein, trace element solution forms are as follows: nitrilotriacetic acid 1.5g/L, MgSO4·7H2O 3.0g/L, MnSO4·H2O
0.5g/L, NaCl 1.0g/L, FeSO4·7H2O 0.1g/L, CoCl2·6H2O 0.1g/L, CaCl20.1g/L, ZnSO4·
7H2O 0.1g/L, CuSO4·5H2O 0.01g/L, AlK (SO4)2·12H2O 0.01g/L, H3BO30.01g/L,
Na2MoO4·2H2O 0.01g/L, deionized water 1.0L/L；
Micro micro-element solution composition are as follows: biotin 2.0mg/L, folic acid 2.0mg/L, pyridoxine hydrochloride 10.0mg/
L, thiamine hydrochloride 5.0mg/L, vitamin B2 5.0mg/L, niacin 5.0mg/L, D-VB5 calcium 5.0mg/L, vitamin B12
0.1mg/L, p-aminobenzoic acid 5.0mg/L, lipoic acid 5.0mg/L, deionized water 1.0L/L.
Further, organic wastewater is sanitary sewage, food processing wastewater, amylum wastewater or beer-production wastewater.
The present invention converts organic wastewater to the principle of acetic acid are as follows:
Methane is converted by organic wastewater first with UASB reactor, the methane of generation enters electrolytic cell；UASB reaction
The water outlet of device enters microorganism electrolysis cell, converts hydrogen, the hydrogen of generation for the organic matter in water outlet using microorganism electrolysis cell
Gas enters electrolytic cell.Organic wastewater has not only been handled in UASB reactor and microorganism electrolysis cell, but also is obtained and generated acetic acid
Unstrpped gas methane and hydrogen.In electrolytic cell, with oxidation state anthraquinone -2,6- disulfonate (AQDS) or/and Fe3+To mediate, first
Alkane and hydrogen generate acetic acid, to realize under the action of electroactive anaerobic methane nutrition archaeal and thermophilic Hydrogen methanogen
The processing of organic wastewater and the production of acetic acid.
Compared to the prior art, the invention has the advantages that and the utility model has the advantages that
(1) it realizes and converts acetic acid for organic wastewater, not only handled waste water but also obtain chemical products acetic acid, be effective
Processing organic wastewater provides new way, all has great importance to energy-saving and emission-reduction and environmental improvement.
(2) electrode of the present invention is without using expensive catalyst, and at low cost, low energy consumption, and the processing and second of organic sewage
The rate that acid generates is very fast.
Detailed description of the invention
Fig. 1 is the schematic diagram of embodiment device.
In figure, 1- water inlet pipe, 2-UASB reactor, 3- sewage pipe, 4- valve, 5- downtake pipe, 6- air inlet pipe, 7- first
Outlet pipe, 8- microorganism electrolysis cell, 9- first anode electrode, 10- the first titanium silk conducting wire, the first cathode electrode of 11-, 12- second
Titanium silk conducting wire, 13- second exhaust pipe, the second outlet pipe of 14-, 15- electrolytic cell, 16- second plate electrode, 17- third titanium silk are led
Line, the second cathode electrode of 18-, the 4th titanium silk conducting wire of 19-, 20- third exhaust pipe, 21- sun-generated electric power.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Embodiment 1
The present embodiment is a kind of device for converting organic wastewater to acetic acid.It is the signal of the present embodiment device referring to Fig. 1
Figure, the device mainly includes 2, one microorganism electrolysis cells 8 of a UASB reactor (i.e. upflow type anaerobic reactor), an electrolytic cell 15
With a sun-generated electric power 21, sun-generated electric power 21 is used to apply voltage to microorganism electrolysis cell 8 and electrolytic cell 15.In the present invention
UASB reactor 2, microorganism electrolysis cell 8, electrolytic cell 15 are closed container, are connected by connecting tube connected thereto and the external world
It is logical.Methane is generated through anaerobic digestion in organic wastewater input UASB reactor 2, generated methane inputs electrolytic cell 15. UASB
The water outlet of reactor enters microorganism electrolysis cell 8, and microorganism electrolysis cell 8 is reaction master using the electroactive microorganism being added in advance
Body, reaction generate hydrogen, and generated hydrogen inputs electrolytic cell 15.In electrolytic cell 15, with oxidation state anthraquinone -2,6- disulfonic acid
Salt or/and Fe3+To mediate, work of the methane and hydrogen being passed through in electroactive anaerobic methane nutrition archaeal and thermophilic Hydrogen methanogen
Acetic acid is converted under.
Specifically, water inlet pipe 1, sewage pipe 3, downtake pipe 5, the first outlet pipe 7 are connected on UASB reactor 2.
Specifically, water inlet pipe 1 is connect with 2 lower part of UASB reactor, for importing organic wastewater；Sewage pipe 3 and 2 bottom of UASB reactor
End connects, and valve 4 is installed on sewage pipe 3, opens valve 4, sludge can be discharged from 2 bottom end of UASB reactor；Downtake pipe 5 with
The connection of 2 top of UASB reactor, the first outlet pipe 7 are connect with 2 top of UASB reactor.
Specifically, microorganism electrolysis cell 8 is built-in with first anode electrode 9 and the first cathode electrode 11, first anode electricity
Pole 9 and the first cathode electrode 11 connect external solar-electricity by the first titanium silk conducting wire 10 and the second titanium silk conducting wire 12 respectively
The hot end and cold end in source 21.The first outlet pipe 7, second exhaust pipe 13, are also connected on microorganism electrolysis cell 8
Two outlet pipes 14.First outlet pipe 7 is connect with 8 lower part of microorganism electrolysis cell, that is, the both ends of the first outlet pipe 7 are separately connected
UASB reactor 2 and microorganism electrolysis cell 8；Second exhaust pipe 13 is connect with 8 top of microorganism electrolysis cell, the second outlet pipe 14
It is connect with 8 top of microorganism electrolysis cell.
Specifically, second plate electrode 16 built in electrolytic cell 15 and the second cathode electrode 18,16 He of second plate electrode
Second cathode electrode 18 connects external sun-generated electric power 21 by third titanium silk conducting wire 17 and the 4th titanium silk conducting wire 19 respectively
Hot end and cold end.Air inlet pipe 6, third exhaust pipe 20 are also connected on electrolytic cell 15.Specifically, the pipe of air inlet pipe 6
Mouth protrudes into electrolytic cell 15, and third exhaust pipe 20 is connect with 15 top of electrolytic cell.
In the present invention, downtake pipe 5, second exhaust pipe 13, air inlet pipe 6 are connected, specifically, downtake pipe 5
It connect, is used to downtake pipe 5 and second exhaust pipe with the air outlet of second exhaust pipe 13 with the air inlet port of air inlet pipe 6
The gas of 13 discharges is imported into electrolytic cell 15.
In the present embodiment, UASB reactor 2, microorganism electrolysis cell 8, electrolytic cell 15 are made of organic glass, all
Connecting tube is all made of silicone tube, first anode electrode 9, the first cathode electrode 11, second plate electrode 16, the second cathode electrode
18 can be carbon cloth, granular graphite, reticulated vitreous carbon, granular activated carbon or carbon fiber brush electrode, and 11 He of the first cathode electrode
Second cathode electrode 18 can also be using the electrode after the modification of the catalyst such as Pt.
Embodiment 2
The present embodiment is the embodiment of the method for converting organic wastewater to acetic acid, is specifically realized using 1 device of embodiment, tool
Steps are as follows for body:
(1) start UASB reactor and microorganism electrolysis cell
(1a) starts UASB reactor
Using the anaerobic activated sludge of sewage treatment plant as inoculum, using the first heavy overflowing liquid of sewage treatment plant as culture medium,
It is inoculated with UASB reactor in the ratio of 3:7 (v/v) after pure nitrogen gas deoxygenation, 3:7 (v/v) is specifically referred to the accession in UASB reactor here
Anaerobic activated sludge and just the volume ratio of heavy overflowing liquid is 3:7.37C constant temperature incubation, when UASB reactor can continue to generate first
UASB reactor start-up is completed when alkane.
(1b) starts microorganism electrolysis cell
Using the anaerobic activated sludge of sewage treatment plant as inoculum, using the first heavy overflowing liquid of sewage treatment plant as culture medium,
Pure nitrogen gas removes the ratio microbe inoculation electrolytic cell of 2:8 (v/v) after oxygen, and 2:8 (v/v) specifically refers to the accession to UASB reactor here
The volume ratio of interior anaerobic activated sludge and first heavy overflowing liquid is 2:8.Microorganism electrolysis cell applied voltage is fixed as -0.9V, 37C
Constant temperature incubation.The electric current of measurement microorganism electrolysis cell and the composition of microorganism electrolysis cell upper gas daily.Microorganism electrolysis cell
For batch operation, every the 5 days liquid with fresh deoxidation waste water displacement 70%, the electric current to microorganism electrolysis cell was maximum and steady
After fixed, the start completion of microorganism electrolysis cell.
(2) culture of electroactive anaerobic methane nutrition archaeal and methanogen
In the present embodiment, electroactive anaerobic methane nutrition archaeal uses Methanosarcina acetivorans
Strain C2A, methanogen use Methanococcus maripaludis.
The culture of (2a) Methanosarcina acetivorans strain C2A
Methanosarcina acetivorans strain C2A uses 141 culture medium culture of DSMZ Medium.
141 medium component of DSMZ Medium are as follows: KCl 0.34g/L；MgCl2·6H2O 4.00g/L；MgSO4·7H2O 3.45g/
L；NH4Cl 0.25 g/L；CaCl2·2H2O 0.14g/L；K2HPO40.49g/L；NaCl 18.00g/L；Fe(NH4)2
(SO4)·6H2O solution (0.1%W/V) 2mL/L；Methanol 3.20g/L；Yeast extract 2.00g/L；Peptone 2.00g/L；Sword
Reddish black solution (0.1%W/V) 0.50mL/L；NaHCO35.00g/L；Trace element solution 10mL/L；Mcg vitamin 10.00
mL/L；One water L-cysteine hydrochloride 0.50g/L；Na2S·9H2O 0.50g/L；Deionized water 1000.00mL/L.Micro member
Plain solution composition are as follows: nitrilotriacetic acid 1.5g/L, MgSO4·7H2O 3.0g/L, MnSO4·H2O 0.5g/L, NaCl 1.0g/L,
FeSO4·7H2O 0.1g/L, CoCl2·6H2O 0.1g/L, CaCl20.1g/L, ZnSO4·7H2O 0.1g/L, CuSO4·
5H2O 0.01g/L, AlK (SO4)2·12H2O 0.01g/L, H3BO30.01g/L, Na2MoO4·2H2O 0.01g/L, deionization
Water 1.0L/L.Micro micro-element solution composition are as follows: biotin 2.0mg/L, folic acid 2.0mg/L, pyridoxine hydrochloride 10.0mg/
L, thiamine hydrochloride 5.0mg/L, vitamin B2 5.0mg/L, niacin 5.0mg/L, 5.0 mg/L of D-VB5 calcium, vitamin B12
0.1mg/L, p-aminobenzoic acid 5.0mg/L, lipoic acid 5.0mg/L, deionized water 1.0L/L.
141 culture medium of DSMZ Medium the preparation method is as follows:
By the above-mentioned substance in addition to bicarbonate, vitamin, cysteine, sulfide, it is dissolved into 1000.00mL in proportion
In deionized water, N is used after boiling in ice bath2And CO2Gaseous mixture aeration be cooled to room temperature, N in gaseous mixture2The CO of sum2Body
Product is than being 8:2.Then it is dispensed into 250mL anaerobism bottle, liquid amount is 150mL in anaerobism bottle；Again with N2And CO2Gaseous mixture expose
Gas -45 minutes 30 minutes, its anaerobism rear pressing cover is sealed, sterilizes 30 minutes, be cooled to room temperature in 121 DEG C.After sterilizing, it is added
The bicarbonate of deoxidation dissolves, and adjusts pH to 7.0；The cysteine and sodium sulfide solution of sterilizing, deoxidation is added, makes cysteine
Reach 0.50g/L with vulcanized sodium ultimate density；The vitamin solution of filtration sterilization, deoxidation is added, reaches its ultimate density
10.00mL/L。
The cultural method of Methanosarcina acetivorans strain C2A are as follows: 10% (V/ is pressed into anaerobism bottle
V Methanosarcina acet ivorans strain C2A) is accessed, and is cultivated at 37 DEG C.
The culture of (2b) Methanococcus maripaludis
Methanococcus maripaludis equally uses 141 culture medium culture of DSMZ Medium.DSMZ
141 medium component of Medium are as follows: KCl:0.34g/L；MgCl2·6H2O 4.00g/L；MgSO4·7H2O 3.45g/L；
NH4Cl 0.25 g/L；CaCl2·2H2O 0.14g/L；K2HPO40.49g/L；NaCl 18.00g/L；Fe(NH4)2(SO4)·
6H2O solution (0.1%/V) 2mL/L；Sodium formate 3.40g/L；Yeast extract 2.00g/L；Peptone 2.00g/L；Resazurin is molten
Liquid (0.1%W/V) 0.50mL/L；NaHCO35.00g/L；Trace element solution 10mL/L；Mcg vitamin 10.00mL/L；One
Water L-cysteine hydrochloride 0.50g/L；Na2S·9H2O 0.50g/L；Deionized water 1000.00mL/L.Trace element solution
Composition: nitrilotriacetic acid 1.5g/L, MgSO4·7H2O 3.0g/L, MnSO4·H2O 0.5g/L, NaCl 1.0 g/L, FeSO4·
7H2O 0.1g/L, CoCl2·6H2O 0.1g/L, CaCl20.1g/L, ZnSO4·7H2O 0.1g/L, CuSO4·5H2O
0.01g/L, AlK (SO4)2·12H2O 0.01g/L, H3BO30.01g/L, Na2MoO4·2H2O 0.01g/L, deionized water
1.0L/L.Micro micro-element solution composition: biotin 2.0mg/L, folic acid 2.0mg/L, pyridoxine hydrochloride 10.0mg/L, salt
Allithiamine 5.0mg/L, vitamin B2 5.0mg/L, niacin 5.0mg/L, D-VB5 calcium 5.0 mg/L, vitamin B12 0.1mg/
L, p-aminobenzoic acid 5.0mg/L, lipoic acid 5.0mg/L, deionized water 1.0L/L.
141 culture medium of DSMZ Medium the preparation method is as follows:
By the above-mentioned substance in addition to bicarbonate, vitamin, cysteine, sulfide, it is dissolved into 1000.00mL in proportion
In deionized water, N is used after boiling in ice bath2And CO2Gaseous mixture aeration be cooled to room temperature, N in gaseous mixture2The CO of sum2Body
Product is than being 8:2.Then it is dispensed into 250mL anaerobism bottle, liquid amount is 150mL in anaerobism bottle；Again with N2And CO2Gaseous mixture expose
Gas 30-45 minutes, its anaerobism rear pressing cover is sealed, sterilizes 30 minutes, be cooled to room temperature in 121 DEG C.After sterilizing, deoxidation is added
Bicarbonate dissolution, adjust pH to 6.8；The cysteine and sodium sulfide solution of sterilizing, deoxidation is added, makes cysteine and sulphur
Change sodium ultimate density and reaches 0.50g/L；The vitamin solution of filtration sterilization, deoxidation is added, its ultimate density is made to reach 10.00
mL/L。
The cultural method of Methanococcus maripaludis are as follows: sterile H is used to anaerobism culture in glassware base2With
CO2Gaseous mixture be aerated -45 minutes 30 minutes, H in gaseous mixture2The CO of sum2Volume ratio be 8:2；Make H2And CO2Gaseous mixture dimension
Two atmospheric pressure are held, then access Methanococcus maripaludis by 10% (V/V) into anaerobism bottle, and at 37 DEG C
Lower culture.
(3) technique that organic wastewater is converted into acetic acid
After UASB reactor 2 and microorganism electrolysis cell 8 start, by water inlet pipe 1, it is anti-that organic wastewater is continuously inputted to UASB
It answers in device 2.Organic wastewater is the organic sewage for being suitble to microorganism growth, including sanitary sewage, food processing wastewater, starch add
Work waste water or beer-production wastewater etc..In UASB reactor 2, organic wastewater anaerobic digestion generates methane CH4, CH4Gas is successively
Enter electrolytic cell 15 through downtake pipe 5, air inlet pipe 6, have in electrolytic cell 15 be added in advance it is cultured
Methanosarcina acetivorans strain C2A and Methanococcus maripaludis.
The water outlet of UASB reactor 2 enters microorganism electrolysis cell 8, the first sun in microorganism electrolysis cell 8 through the first outlet pipe 7
The electroactive microorganism of 9 adsorption of pole electrode generates CO using the organic matter in being discharged as substrate2、H+And electronics, H+And electronics
The first cathode electrode 11 is moved under applied voltage effect, and in 11 Surface Creation H of the first cathode electrode2；The H of generation2Successively
Enter electrolytic cell 15 through second exhaust pipe 13, air inlet pipe 6.
Methanococcus maripaludis is by H in electrolytic cell 152And CO2It is converted into CH4, and in electrolytic cell 15
Methanosarcina acetivorans strain C2A is in -2,6 disulfonate of oxidation state anthraquinone (AQDS), Fe3+Mediation
It is lower to convert acetic acid and H for methane+, while generating reduction-state quinone -2,6 disulfonate (AQDSH2) and Fe2+, AQDSH2With
Fe2+Generation electronics, the H of generation are oxidized on 16 surface of second plate electrode of electrolytic cell 15+It is acted on electronics in applied voltage
Under move to the second cathode electrode 18, and in 18 Surface Creation H of the second cathode electrode2, the H of generation2Again by Methanococcus
Maripaludis is converted into CH4, CH4Acetic acid is converted by Methanosarcina acetivorans strain C2A again.So
Circular response can continuously generate acetic acid.Through detecting, using apparatus of the present invention, organic waste Organic substance in water is converted into acetic acid
High conversion rate is up to 60% or more.
It is related to reacting as follows in UASB reactor:
Anode electrode is related to reacting in microorganism electrolysis cell 8:
8 inner cathode electrode of microorganism electrolysis cell is related to reacting:
2H++2e-→H2
It is related to reacting as follows in electrolytic cell 15:
Anode electrode is related to reacting in electrolytic cell 15:
AQDSH2→AQDS+2H++2e-
Fe2-→Fe3++e-
15 inner cathode electrode of electrolytic cell is related to reacting:
2H++2e-→H2
Above-described embodiment is only one of various embodiments, for those skilled in the art, in above description base
Other various forms of variations or variation can also be made on plinth, and these belong to true spirit and derive other
Variation or variation still fall within the scope of the present invention.
Claims (10)
1. a kind of device for converting organic wastewater to acetic acid, it is characterized in that:
It mainly include a UASB reactor, a microorganism electrolysis cell, an electrolytic cell and a power supply, power supply is used to be electrolysed to microorganism
The yin-yang interpolar of pond and electrolytic cell applies voltage；
Methane is converted by organic wastewater in UASB reactor, methane inputs electrolytic cell by pipeline；
The water outlet of UASB reactor enters microorganism electrolysis cell, under the action of the electroactive microorganism being added in advance, in water outlet
Organic matter be converted into hydrogen, hydrogen inputs electrolytic cell by pipeline；
In electrolytic cell, with oxidation state anthraquinone -2,6- disulfonate or/and Fe3+To mediate, the methane and hydrogen being passed through are electroactive
Acetic acid is converted under the action of anaerobic methane nutrition archaeal and thermophilic Hydrogen methanogen.
2. device as described in claim 1, it is characterized in that:
Water inlet pipe, sewage pipe, downtake pipe, the first outlet pipe are connected on the UASB reactor,
The first outlet pipe, second exhaust pipe, the second outlet pipe, i.e. the two of the first outlet pipe are connected on the microorganism electrolysis cell
End is separately connected UASB reactor and microorganism electrolysis cell；
Air inlet pipe, third exhaust pipe are connected on the electrolytic cell；
The air inlet port of the air outlet and air inlet pipe of downtake pipe and second exhaust pipe connects, be used to downtake pipe and
The gas of second exhaust pipe discharge is imported into electrolytic cell.
3. device as described in claim 1, it is characterized in that:
The microorganism electrolysis cell and anode electrode in the electrolytic cell and cathode electrode are carbon cloth electrode, granular graphite electricity
Pole, reticulated vitreous carbon electrodes, seed activity carbon resistance rod or carbon fiber brush electrode.
4. device as described in claim 1, it is characterized in that:
Cathode electrode in the microorganism electrolysis cell and the electrolytic cell be carbon cloth electrode after noble metal catalyst modification,
Grain graphite electrode, reticulated vitreous carbon electrodes, seed activity carbon resistance rod or carbon fiber brush electrode.
5. a kind of method for converting acetic acid for organic wastewater, it is characterized in that:
Using device of any of claims 1-4, comprising:
(1) start UASB reactor:
Using the anaerobic activated sludge of sewage treatment plant as inoculum, using the first heavy overflowing liquid of sewage treatment plant as culture medium, purity nitrogen
UASB reactor, 37C constant temperature incubation, when UASB reactor persistently generates methane, i.e. UASB reactor start-up are inoculated with after gas deoxygenation
It completes；
(2) start microorganism electrolysis cell:
Using the anaerobic activated sludge of sewage treatment plant as inoculum, using the first heavy overflowing liquid of sewage treatment plant as culture medium, purity nitrogen
Microorganism electrolysis cell, microorganism electrolysis cell applied voltage are inoculated with after gas deoxygenation, 37C constant temperature incubation was taken off every 3-7 days with fresh
70% liquid in oxygen waste water displacement microorganism electrolysis cell, it is when the electric current of microorganism electrolysis cell reaches maximum and stablizes, i.e., micro-
Biological electrolytic cell start completion；
(3) organic wastewater is converted into the technique of acetic acid, and the technique is laggard in UASB reactor and microorganism electrolysis cell start completion
Row:
Organic wastewater continuously inputs in UASB reactor, and the methane generated in UASB reactor enters electrolytic cell；
The water outlet of UASB reactor enters microorganism electrolysis cell, the H generated in microorganism electrolysis cell2Into electrolytic cell；
Electrolytic cell is provided with the culture medium of deoxidation, accesses electroactive anaerobic methane nutrition archaeal and thermophilic Hydrogen methane phase in culture medium
Bacterium；In electrolytic cell, with oxidation state anthraquinone -2,6- disulfonate or/and Fe3+To mediate, the methane and hydrogen being passed through are electroactive
Acetic acid is converted under the action of anaerobic methane nutrition archaeal and thermophilic Hydrogen methanogen.
6. method as claimed in claim 5, it is characterized in that:
Startup stage and organic wastewater transformation stage, set cathode electrode current potential in microorganism electrolysis cell and electrolytic cell to-
0.3V--2.0V.The current potential is the current potential of relative standard's hydrogen electrode.
7. method as claimed in claim 5, it is characterized in that:
The electroactive anaerobic methane nutrition archaeal uses Methanosarcina acetivorans strain C2A.
8. method as claimed in claim 5, it is characterized in that:
The thermophilic Hydrogen methanogen uses Methanococcus maripaludis.
9. method as claimed in claim 5, it is characterized in that:
Culture medium is 141 culture medium of DSMZ Medium, the ingredient of 141 culture medium of DSMZ Medium in electrolytic cell are as follows:
KCl 0.34g/L；MgCl2·6H2O 4.00g/L；MgSO4·7H2O 3.45g/L；NH4Cl 0.25g/L；CaCl2·
2H2O 0.14g/L；K2HPO40.49g/L；NaCl 18.00g/L；Fe (the NH of mass-volume concentration 0.1%4)2(SO4)·
6H2O solution 2mL/L；Methanol 3.20g/L；Sodium formate 3.40g/L；Yeast extract 2.00g/L；Peptone 2.00g/L；Quality
The resazurin solution 0.50mL/L of volumetric concentration 0.1%；NaHCO35.00g/L；Trace element solution 10mL/L；Micro dimension life
Plain 10.00mL/L；One water L-cysteine hydrochloride 0.50g/L；Na2S·9H2O 0.50g/L；Deionized water 1000.00mL/
L；
Wherein, trace element solution forms are as follows: nitrilotriacetic acid 1.5g/L, MgSO4·7H2O 3.0g/L, MnSO4·H2O 0.5g/
L, NaCl 1.0g/L, FeSO4·7H2O 0.1g/L, CoCl2·6H2O 0.1g/L, CaCl20.1g/L, ZnSO4·7H2O
0.1g/L, CuSO4·5H2O 0.01g/L, AlK (SO4)2·12H2O 0.01g/L, H3BO30.01g/L, Na2MoO4·2H2O
0.01g/L, deionized water 1.0L/L；
Micro micro-element solution composition are as follows: biotin 2.0mg/L, folic acid 2.0mg/L, pyridoxine hydrochloride 10.0mg/L, salt
Allithiamine 5.0mg/L, vitamin B2 5.0mg/L, niacin 5.0mg/L, D-VB5 calcium 5.0mg/L, vitamin B12 0.1mg/L,
P-aminobenzoic acid 5.0mg/L, lipoic acid 5.0mg/L, deionized water 1.0L/L.
10. method as claimed in claim 5, it is characterized in that:
The organic wastewater is sanitary sewage, food processing wastewater, amylum wastewater or beer-production wastewater.
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