CN206751604U - The wastewater treatment equipment that a kind of bioelectrochemical system couples with UASB - Google Patents
The wastewater treatment equipment that a kind of bioelectrochemical system couples with UASB Download PDFInfo
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- CN206751604U CN206751604U CN201720282782.1U CN201720282782U CN206751604U CN 206751604 U CN206751604 U CN 206751604U CN 201720282782 U CN201720282782 U CN 201720282782U CN 206751604 U CN206751604 U CN 206751604U
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Abstract
The utility model discloses a kind of bioelectrochemistry based on cathode potential regulation and control to couple upflow type anaerobic biological reaction apparatus.In the device, annular electrode is set, bioelectrode system provides degraded of the higher electronics of energy for pollutant for the microorganism near described upflow type anaerobic bioreactor cylinder inner cathode in upflow type anaerobic bioreactor sludge blanket.Reference electrode is fixed near biological-cathode by fastening bolt, and is connected by wire with on-line detector and computer, for monitoring the cathode potential of coupled reactor biological-cathode in real time.The required electrical potential difference of reaction can be calculated by Nernst equation according to the Gibbs free energy needed for different contaminant degradations, and cathode potential control is being slightly below in the range of required electrical potential difference by the applied voltage by adjusting bioelectrochemical system, reach low energy consumption, expeditiously the purpose of the persistent organic pollutants such as degradating chloro nitrobenzene.
Description
Technical field
It the utility model is related to sewage treatment area, and in particular to the waste water that a kind of bioelectrochemical system couples with UASB
Processing unit.
Background technology
In biological wastewater treatment field, Anaerobic Microbiological Treatment Technology has a wide range of application, operation energy consumption is low, volumetric loading is high,
Sludge yield is few and with production natural pond production capacity effect, is one of technique most widely used in waste water treatment process.Wherein up flow type
Anaerobic mud bed reactor (UASB), because it has, organic loading and clearance are high, anti-load impact and temperature, pH changing capabilities
The features such as strong, it has also become the prevailing technology device of anaerobic bio-treated.Also have to organic wastewaters such as chloronitrobenzene, azo dyes
There is certain reduction conversion capability, but there are problems that starting the cycle is long, rate of reduction is slow, reduction efficiency is low etc..
The basis of bioelectrochemical system is the electricity generation ability on anode biomembrane, is grown in the micro- life of electricity production of anode surface
Thing oxidation substrates produce electronics, in addition to being metabolized for own growth, can also be arrived by electron transmission to anode surface by external circuit
Up to cathodic reduction electron acceptor.If the potential of cathode reaction is higher than anode reaction, electronics can be by external circuit spontaneously
Negative electrode is flowed to from anode, otherwise electronics then spontaneous can not flow to negative electrode, it is necessary to which additional certain voltage, overcomes this energy barrier to make
Electronics flows to negative electrode.
Cathode microbial obtains the electricity that the energy obtained while electronics is proportional between electron acceptor and electron donor
Potential difference, by that reaction that originally thermodynamically can not be spontaneous can be promoted to occur cathode potential control.Therefore, bioelectrochemistry
System gradually applies to the deoxidization, degradation of the pollutants such as nitrobenzene, chlorine-containing compound, azo dyes, nitrate, heavy metal ion
Central, becoming one has the multi-functional technology platforms such as resource reclaim, pollutant removal, compound electro synthesis.
Bioelectrochemistry coupling anaerobic organism reaction unit can significantly increase the process performance of organic wastewater with difficult degradation thereby,
With higher application value.But coupled system lacks a set of efficient operation control methods.
Utility model content
The purpose of this utility model is to be to overcome deficiency present in above-mentioned technology, there is provided one kind is adjusted based on cathode potential
The bioelectrochemistry coupling upflow type anaerobic biological reaction apparatus and application method of control.
The wastewater treatment equipment that bioelectrochemical system couples with UASB, including bioelectrode system and UASB reactor cylinders
Body, described UASB reactor shells bottom are provided with water inlet, and the inlet pipeline of water inlet front end is provided with water pump；UASB reacts
Water distributing plate, Sludge Bed and three phase separator are sequentially provided with device cylinder from the bottom to top；The top ring of three phase separator is arranged with excessive
Weir is flowed, exhalant region unlimited at the top of one bottom lock of clamping formation between downflow weir and UASB reactor shells top, and
Delivery port is set on exhalant region outer wall；Bioelectrode system is arranged in the Sludge Bed above water distributing plate, including one group of annular cloth
The bioelectrode pair put, the center of bioelectrode pair is biological anode, around around biological-cathode, biological anode and biological-cathode
It is connected respectively by wire with the positive pole of the dc source of outside with negative pole；Graphite felt negative electrode is nearby fixed with reference electrode, joins
Than electrode by being connected successively with on-line detector and computer, for determining the cathode potential of biological-cathode.
Preferably, the gas vent of three phase separator connects water-sealed drainage bottle by pipeline, wet type gas stream is then passed through again
In gauge；
Preferably, biological anode uses graphite fibre brush anode, described biological-cathode uses the graphite of cylinder wall-like
Felt negative electrode, graphite fibre brush anode are coaxially disposed with graphite felt negative electrode.Further, biological anode radius is 2cm, described life
The distance between thing negative electrode and biological anode are 2cm.
The beneficial effects of the utility model are：Bioelectrochemistry coupling anaerobic biological reactor can be effectively facilitated chlorine
Reduction for hardly degraded organic substances such as nitrobenzene converts degraded, and accelerates anaerobic granulation, realizes that the quick of reactor is opened
It is dynamic.It is capable of the performance of low energy consumption, expeditiously raising contaminant degradation efficiency based on cathode potential regulation and control method.
Brief description of the drawings
Fig. 1 is the structural representation for the wastewater treatment equipment that bioelectrochemical system couples with UASB；
Fig. 2 is the schematic diagram after the wastewater treatment equipment filling sludge that bioelectrochemical system couples with UASB；
Wherein：1. intake pump, 2. water inlets, 3. water distributing plates, 4. biological-cathodes, 5. biological anodes, 6. reference electrodes, 7. dirts
Mud bed, 8.UASB reactor shells, 9 three phase separators, 10. downflow weirs, 11. delivery ports, 12. water-sealed drainage bottles, 13. wet type gas streams
Gauge, 14. dc sources, 15. on-line computing models, 16. computers.
Embodiment
The utility model is further elaborated with reference to the accompanying drawings and examples.
Core of the present utility model is to be provided with one group of bioelectrode in the sludge bed position of anaerobic reactor.By right
Cathode potential control can promote reaction that originally thermodynamically can not be spontaneous to occur, and accelerate to chloride containing the difficult drop such as nitro-aromatic
Solve the reduction conversion of organic matter.
As shown in figure 1, the wastewater treatment equipment that a kind of bioelectrochemical system couples with UASB, the device includes biological electricity
Electrode systems and UASB reactor shells 8.UASB reactor shells 8 design in three-stage, and bottom and top are straight tube shape, but on
The diameter of portion's straight tube is more than bottom straight tube, and the inverted trapezoidal shape linkage section gradually expanded by caliber between two straight tubes is connected.
The bottom of UASB reactor shells 8 is provided with water inlet 2, and the inlet pipeline of the front end of water inlet 2 is provided with water pump 1, for providing water inlet
Power.Water distributing plate 3, Sludge Bed 7 and three phase separator 9 are sequentially provided with UASB reactor shells 8 from the bottom to top.Sludge Bed 7
For the cavity of the top of water distributing plate 3, need to fill activated sludge thereto in advance before reactor operation, as sewage disposal process
In bed body, as shown in Figure 2.Three phase separator 9 is in funnel-form, bottom opening are located at caliber expanding reach, contain activated sludge
When rising to herein with the waste water of gas, gas enters three phase separator 9, and sludge sinks because flow velocity declines, clarified wastewater
Continue to rise to both sides.The top ring of three phase separator 9 is arranged with downflow weir 10, downflow weir 10 with UASB reactor shells 8
Clamping forms exhalant region unlimited at the top of a bottom lock between portion, and delivery port 11 is set on exhalant region outer wall.Biology
Electrode system is arranged in the Sludge Bed 7 of the top of water distributing plate 3, including one group of bioelectrode pair being circular layout, bioelectrode pair
Center be biological anode 5, around around biological-cathode 4.Biological anode 5 uses graphite fibre brush anode, described biology the moon
Pole 4 uses the graphite felt negative electrode of cylinder wall-like, and graphite fibre brush anode is coaxially disposed with graphite felt negative electrode.The biological radius of anode 5
For 2cm, the distance between biological-cathode 4 and biological anode 5 are 2cm.Biological anode 5 and biological-cathode 4 respectively by wire with
The positive pole of outside dc source 14 is connected with negative pole.Graphite felt negative electrode 4 is nearby fixed with a reference electricity by fastening bolt
Pole 6, by being connected successively with on-line detector 15 and computer 16, on-line detector 15 needs to connect reference electrode 6 simultaneously
To the negative pole of power supply, on-line detector 15 receives reference electrode 6 and determines obtained data, and is fed back to computer 16, real
Now the cathode potential of biological-cathode 4 is determined.In addition, in order to determine the gas flow of reactor discharge and component therein, three-phase
The gas vent of separator 9 also connects water-sealed drainage bottle 15 by pipeline, is then passed through again in wet gas flow meter 16.
Bioelectrode system can provide energy for the microorganism near UASB reactor shell inner cathodes in the utility model
The higher electronics of amount is used for the degraded of pollutant.Cathode potential is the intrinsic parameters for driving bioelectrochemical system cathode reaction,
But it is different to obtain applied voltage required during identical negative electrode because impedance is different for the reactor of various configuration and size.The reaction fills
Putting can be by on-line computing model and computer real-time monitoring cathode potential.
It is using the method for wastewater treatment of the device：Gibbs according to needed for pending target contaminant degraded is free
Can, the electrical potential difference needed for reaction is calculated by Nernst equation；During being handled using the device waste water, lead to
Cathode potential control is being slightly below required electrical potential difference by the voltage for overregulating dc source 14 outside in bioelectrode system
In the range of, reach low energy consumption, expeditiously the purpose of the persistent organic pollutants such as degradating chloro nitrobenzene.Wastewater treatment process
In, cathode potential can be monitored in real time by the reference electrode 6 that graphite felt negative electrode is nearby fixed, and pass through on-line computing model and meter
Calculate machine-readable take.The specific value that cathode potential is less than required electrical potential difference needs to be determined by experiment.
Bioelectrode is set inside anaerobic biological reactor, is not that anaerobic reactor and the simple of electrochemical techniques are folded
Add, but coupling can be formed.(1) biological anode enhancement microbiological metabolism, so as to improve organic wastewater COD removals
Energy.(2) biological-cathode can provide the electronics of higher-energy, and the reduction beneficial to hardly degraded organic substances such as chloronitrobenzenes converts.(3)
Material of the consumption with oxidizing property, reduces the oxidation-reduction potential in anaerobic reactor, is advantageous to the metabolism life of methanogen
Long and reduction reaction progress.(4) evolving hydrogen reaction occurs, produces the electron donor H that many microorganisms can efficiently utilize2.Under
Face is based on the device, illustrates treatment effect of the utility model to waste water by specific embodiment.
Embodiment
Device concrete structure in the present embodiment is as it was previously stated, will not be repeated here.It is anti-that anaerobism is carried out using said apparatus
Device start-up course is answered, three groups of wastewater treatment equipments of operation are contrasted.Device parameter is as follows；UASB reactor upper inner diameters
19cm, lower inner diameter 11cm, high 50cm, cumulative volume 6.6L, dischargeable capacity 6.38L.Waste water is handled as giving up containing chloronitrobenzene
Water.
In three groups of devices：R1 groups are that R2 groups are cathode potential to traditional UASB reactors (being free of bioelectrode system)
The utility model wastewater treatment equipment in -450mV is controlled, R3 groups are that cathode potential controls the utility model in -660mV to give up
Water treatment facilities.Three groups of reactors (R1, R2, R3) are in hydraulic detention time 24h, organic loading 0.5kg CODm-3·d-1Bar
Run under part.
When chloronitrobenzene 2,4-DClNB influent loads are 50mgL-1·d-1When, cathode potential is -660mV R3 groups
In reactor, dechlorination rate is 78.46 ± 6.14%, hence it is evident that (dechlorination rate is for R2 groups reactor higher than cathode potential -450mV
71.44 ± 4.97%) and R1 groups reactor (dechlorination rate be 63.66 ± 3.19%).As a result show, the utility model reactor
For traditional UASB reactors, 2,4-DNClB reduction dechlorinations can be strengthened；And regulation and control cathode potential control is slightly
After required electrical potential difference, relatively low cathode potential has more preferable dechlorination (dechlorination rate of R3 groups is significantly larger than R2 groups),
Be advantageous to react rate-limiting step tetrachloro aniline 4-ClAn reduction dechlorination.
Claims (4)
- A kind of 1. wastewater treatment equipment that bioelectrochemical system couples with UASB, it is characterised in that：Device includes bioelectrode System and UASB reactor shells（8）, described UASB reactor shells（8）Bottom is provided with water inlet（2）, water inlet（2）Before The inlet pipeline at end is provided with water pump（1）；UASB reactor shells（8）In be sequentially provided with water distributing plate from the bottom to top（3）, sludge Bed（7）And three phase separator（9）；Three phase separator（9）Top ring be arranged with downflow weir (10), downflow weir (10) and UASB are anti- Answer device cylinder（8）Clamping forms exhalant region unlimited at the top of a bottom lock between top, and is set on exhalant region outer wall Delivery port（11）；Bioelectrode system is arranged at water distributing plate（3）The Sludge Bed of top（7）In, including one group of life being circular layout Thing electrode pair, the center of bioelectrode pair is biological anode（5）, around around biological-cathode（4）, biological anode（5）And biology Negative electrode（4）Pass through wire and outside dc source respectively（14）Positive pole be connected with negative pole；Biological-cathode（4）Nearby it is fixed with Reference electrode（6）, reference electrode（6）By successively with on-line detector（15）And computer（16）It is connected, for determining life Thing negative electrode（4）Cathode potential.
- 2. wastewater treatment equipment as claimed in claim 1, it is characterised in that：Described three phase separator（9）Gas vent Water-sealed drainage bottle is connected by pipeline（12）, wet gas flow meter is then passed through again（13）In.
- 3. wastewater treatment equipment as claimed in claim 1, it is characterised in that：Described biological anode（5）Using graphite fibre Brush anode, described biological-cathode（4）Using the graphite felt negative electrode of cylinder wall-like, graphite fibre brush anode and graphite felt negative electrode are same Axle is set.
- 4. wastewater treatment equipment as claimed in claim 3, it is characterised in that：Described biological anode（5）Radius is 2cm, institute The biological-cathode stated（4）With biological anode（5）The distance between be 2cm.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106946405A (en) * | 2017-03-22 | 2017-07-14 | 浙江大学 | Wastewater treatment equipment and its method that bioelectrochemical system is coupled with UASB |
| CN109160618A (en) * | 2018-10-16 | 2019-01-08 | 中国石油化工股份有限公司 | A kind of bio-electrochemical reactor for the quick deoxygenation of oil field waste |
| CN111320259A (en) * | 2020-03-27 | 2020-06-23 | 太原学院 | Micro-aerobic granular sludge and bioelectrode coupling coking wastewater enhanced treatment method and treatment device |
| CN113087137A (en) * | 2021-03-16 | 2021-07-09 | 中国恩菲工程技术有限公司 | Stirring type electrode anaerobic reactor |
| CN113149202A (en) * | 2021-03-15 | 2021-07-23 | 中国恩菲工程技术有限公司 | Anaerobic reactor |
| CN113461151A (en) * | 2021-05-21 | 2021-10-01 | 盐城工学院 | Array interconnection formula electrode UASB reactor group |
-
2017
- 2017-03-22 CN CN201720282782.1U patent/CN206751604U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106946405A (en) * | 2017-03-22 | 2017-07-14 | 浙江大学 | Wastewater treatment equipment and its method that bioelectrochemical system is coupled with UASB |
| CN106946405B (en) * | 2017-03-22 | 2023-04-25 | 浙江大学 | Bioelectrochemical system and UASB coupled wastewater treatment device and method thereof |
| CN109160618A (en) * | 2018-10-16 | 2019-01-08 | 中国石油化工股份有限公司 | A kind of bio-electrochemical reactor for the quick deoxygenation of oil field waste |
| CN109160618B (en) * | 2018-10-16 | 2021-08-17 | 中国石油化工股份有限公司 | Bioelectrochemical reactor for quickly deoxidizing oil field wastewater |
| CN111320259A (en) * | 2020-03-27 | 2020-06-23 | 太原学院 | Micro-aerobic granular sludge and bioelectrode coupling coking wastewater enhanced treatment method and treatment device |
| CN111320259B (en) * | 2020-03-27 | 2022-03-08 | 太原学院 | Micro-aerobic granular sludge and bioelectrode coupling coking wastewater enhanced treatment method and treatment device |
| CN113149202A (en) * | 2021-03-15 | 2021-07-23 | 中国恩菲工程技术有限公司 | Anaerobic reactor |
| CN113087137A (en) * | 2021-03-16 | 2021-07-09 | 中国恩菲工程技术有限公司 | Stirring type electrode anaerobic reactor |
| CN113461151A (en) * | 2021-05-21 | 2021-10-01 | 盐城工学院 | Array interconnection formula electrode UASB reactor group |
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