CN101962232A - Sediment microorganism electrochemical device and application thereof - Google Patents
Sediment microorganism electrochemical device and application thereof Download PDFInfo
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- CN101962232A CN101962232A CN2010105185985A CN201010518598A CN101962232A CN 101962232 A CN101962232 A CN 101962232A CN 2010105185985 A CN2010105185985 A CN 2010105185985A CN 201010518598 A CN201010518598 A CN 201010518598A CN 101962232 A CN101962232 A CN 101962232A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The invention relates to a sediment microorganism electrochemical device, belonging to the field of environmental engineering. The device mainly comprises a cathode, an anode, conducting wires, a resistances and a stirring shaft with a helical blade, a support bar and a scraper. The cathode arranged in the water phase, the anode arranged in the sediment and the resistance are connected in series through the conducting wires to form a return circuit, and the resistance is arranged between the cathode and the anode. After the device of the invention runs for a while, the stirring shaft is rotated and the sediment contacted with the electrode is replaced to enhance the efficiency of the sediment microorganism electrochemical device and improve the repair effect of the device to the sediment. The sediment microorganism electrochemical device of the invention can enhance the mass transfer of the organics in the sediment in the anodic area significantly. The device of the invention has simple structure, less needs of maintenance and construction, and good economic benefit and application prospects.
Description
Technical field
The present invention relates to a kind of settling microorganism electrochemical device, particularly a kind of helical stir and scrape the settling microorganism electrochemical device of mud function of having belongs to field of environment engineering.
Background technology
Along with expanding economy, the progress of society and the continuous growth of population, human increasing to the demand of the energy, global energy dilemma is outstanding day by day.Simultaneously, the consumption significantly of mineral fuel has caused serious environmental pollution day by day, is threatening existent environment of people.In order to solve the big problems of above-mentioned two puzzlements national economy and national economy sustainable developments, people thirst for developing and a kind ofly both can solve environmental pollution, and the technology of clean energy can be provided again.And the microbiological fuel cell technology has characteristics such as green, energy-saving and environmental protection just can satisfy such requirement because of it, becomes one of the most popular research topic of current scientific and technological circle.
Microbiological fuel cell is to utilize electrochemical techniques microbial metabolism can be converted into a kind of device of electric energy.Microbiological fuel cell not only can obtain electric energy from the organism of easy biochemical degradation, also can obtain electric energy from the organism of some difficult degradations.Further discover, microbiological fuel cell also can utilize the organism in the settling to come electrogenesis, and its mechanism of action is: negative electrode is placed the aerobic aqueous phase in upper strata, and anode material is positioned in the settling, be connected by lead between negative electrode and the anode, and be connected to resistance.Organism is deposited indigenous microorganism oxygenolysis in the thing in the settling near the positive column, the electronics that produces arrives negative electrode through external circuit again to anode, and proton is delivered to negative electrode by water-settling interface, and generate water, thereby finish whole chemistry redox reaction with oxygen reaction.
Above-mentioned such microorganism electrochemical device can be the water body upper sensor provides power supply, also can be used for organic reparation in the settling.The contriver finds when the microorganism electrochemical device of research prior art, with the electrode of graphite as settling microorganism electrochemical device, find after the operation by for some time, from the closer zone of anode (0～1 cm), the content of TOC and easy oxidation of organic compounds descends fast in the settling, and the settling after the effect of discovery microorganism electrochemical device, its redox potential is shuffled, and can suppress to produce in the settling methane and sulphur reductive process.Compare existing sediment in-situ biological renovation method, do not need to add electron acceptor(EA), oxygenate or microorganism, but utilize indigenous microorganism in the bed mud, increase its microorganism active, quicken degradation of organic matter in the bed mud by additional electrodes.But away from anodic zone (〉 3 cm) clearance of total organic matter is not high, and the transmission that organism anode in the settling is described is the important factor that influences this type of settling microorganism electrochemical device performance, becomes an important bottleneck of its development and application.
Summary of the invention
At the deficiencies in the prior art and defective, technical purpose of the present invention is to overcome organism mass transfer problem in the existing in prior technology settling, and anode is long duration of service, the shortcoming of inefficiency, a kind of novel settling microorganism electrochemical device is provided, make this settling microorganism electrochemical device can improve the organism mass transfer of positive column, improve anode electrode efficient, further enlarge settling microorganism electrochemical device for sedimental repair.
For realizing technical purpose of the present invention, technical scheme of the present invention is as follows:
One, a kind of settling microorganism electrochemical device, mainly by negative electrode, anode, lead, resistance, and the stir shaft composition that has screw-blade, support bar and cleaning shoe; Wherein will be arranged in the negative electrode of aqueous phase, the anode that is positioned at settling and resistance by lead and be together in series and form a loop, resistance is between negative electrode and anode; Stir shaft vertically runs through water and settling, it is positioned at and is provided with screw-blade on the sedimental end and distributes around stir shaft, and be vertically installed with at least two support bars in its gap that is not taken by screw-blade, the other end of support bar connects cleaning shoe, makes cleaning shoe vertically parallel with stir shaft; The end that stir shaft is positioned at aqueous phase vertically passes from negative electrode and is positioned the center of whole device.
Settling microorganism electrochemical device of the present invention also comprises support, and support is coated on the anode periphery and anode is fixed; Support is cylindrical.
The electrode materials of negative electrode of the present invention is stainless steel or carbon felt; Running through because negative electrode is stirred axle, is annular therefore.
Anodic electrode materials of the present invention is the carbon felt; And be cylindrical.
The material of stir shaft of the present invention, cleaning shoe, support bar and screw-blade is that polyvinyl chloride or hardness are 60～95 plastic material.
Two, the application of settling microorganism electrochemical device of the present invention.
Concrete application method is:
A, electrode are installed
After anode being fixed in the inwall of support, the stir shaft that will have screw-blade, support bar and cleaning shoe places support, regulates support bar to change the length of cleaning shoe, so that cleaning shoe can touch anode; With this electrode that fixes, stir shaft be placed in the settling; Then negative electrode is placed settling upper strata aqueous phase, negative electrode is located thereby stir shaft passes from negative electrode;
B, circuit connect
Negative electrode, anode and resistance is cascaded with lead forms a loop, and resistance is between negative electrode and anode;
The operation of C, settling microorganism electrochemical device
After settling microorganism electrochemical device was enabled in 20 days, every 14 day time, 60 rev/mins of rotation stir shafts were to improve the organic mass transfer in positive column.
Beneficial effect of the present invention is:
(1) the present invention is with the different and advantage of prior art: both can prevent long-play, anode is rich in low organic settling and is covered, can make settling mix by the mode of screw propulsion again, and constantly will be rich in high organic settling and contact with anode;
(2) settling microorganism electrochemical apparatus structure of the present invention is simple, does not need too many maintenance, and construction and running cost are low;
(3) have helical stir and scrape the settling microorganism electrochemical device of mud function by of the present invention, can significantly improve electricity generation ability and settling repair.
Description of drawings
Fig. 1 structural representation of the present invention
Wherein, 1-negative electrode; The 2-stir shaft; 3-resistance; The 4-lead; The 5-anode; The 6-cleaning shoe; The 7-support bar; The 8-screw-blade; The 9-support.
When Fig. 2 negative electrode was the carbon felt, voltage over time.
When Fig. 3 negative electrode was stainless steel, voltage over time.
Embodiment
Below by specific embodiment technical scheme of the present invention is described further.
Embodiment 1
Present embodiment illustrates concrete structure, application method and the principle of work of settling microorganism electrochemical device of the present invention.
With reference to accompanying drawing 1, settling microorganism electrochemical device, mainly by negative electrode 1, anode 5, lead 3, resistance 4, and stir shaft 2 compositions that have screw-blade 8, support bar 7 and cleaning shoe 6; Wherein will be arranged in the negative electrode 1 of aqueous phase, the anode 5 that is positioned at settling and resistance 4 by lead 3 and be together in series and form a loop, resistance 4 is between negative electrode 1 and anode 5; Stir shaft 2 vertically runs through water and settling, it is positioned at and is provided with screw-blade 8 on the sedimental end and distributes around stir shaft 2, and be vertically installed with at least two support bars 7 in its gap that is not taken by screw-blade 8, the other end of support bar 7 connects cleaning shoe 6, makes that cleaning shoe 6 is vertically parallel with stir shaft 2; The end that stir shaft 2 is positioned at aqueous phase vertically passes from negative electrode 1 and is positioned the center of whole device.
This device also comprises support 9, and it is peripheral and anode 5 is fixing that support 9 is coated on anode 5; When support 9 was cylindrical, anode 5 also was cylindrical.And run through owing to negative electrode 1 is stirred axle 2, so negative electrode 1 is an annular.
When device of the present invention is installed, anode 5 is fixed in the inwall of support 9 after, the stir shaft 2 that will have screw-blade 8 and cleaning shoe 6 places support 9, suitably regulates the length of cleaning shoe 6, so that cleaning shoe can touch anode; Then negative electrode 1 is placed the aerobic aqueous phase in settling upper strata, anode 5 and support 9 are placed settling, pass the circular hole of stir shaft 2 from negative electrode 1.During use, negative electrode 1 and anode 5 with settling microorganism electrochemical device are connected with resistance 4 by lead 3, and resistance 4 is between anode 5 and negative electrode 1.Near the anode 5 anerobe, as electron acceptor(EA), constantly with the oxidation operation near the settling it, thereby transmission electronics and proton form electric current to negative electrode 1 with anode 5.Along with the carrying out in reaction times, the organic content from anode 0～1 cm place constantly reduces, and the efficient of settling microorganism electrochemical device begins to descend.Therefore every 14 days, rotate stir shaft 2, drive cleaning shoe 6, can be scraped off the settling of some low organic content that adhere on the anode 5, under the effect of the screw-blade 8 that stir shaft 2 is with, the settling that high organic content is rich in the centre can be drawn close to the anode 5 of both sides, thereby improves the efficient of settling microorganism electrochemical device, quickens organic degraded in the settling.
Embodiment 2
Present embodiment illustrates organic effect experiment in this settling microorganism electrochemical device removal settling.
The settling of getting in domestic Taihu Lake, Jiangsu of 700 g places reactor, presses embodiment 1 described installation method with carbon felt anode (useful area 100 cm
2) be encased in the support that soft glass makes and fixing, be inserted in the settling.The stir shaft that will have screw-blade and cleaning shoe is inserted into the anode middle part, and then adds 500 mL water, carbon felt negative electrode (useful area 60 cm
2) swim on the water surface, after settling microorganism electrochemical device connected resistance, voltage began slow growth, after 20 days, rotation stir shaft (60 rev/mins) stirs settling, stops then, repeated to stir every 14 days, the peak voltage that obtains in this process is that 300 mV(see Fig. 2).Move after 60 days, the settling after the effect of taking-up settling microorganism electrochemical device is analyzed organic content (LOI) in the settling.
Organic content calcination waste (LOI=(W
105-W
550)/W
105) * 100%) calculates, wherein W
105The weight of expression settling after oven dry is spent the night under 105 degree, W
550The expression settling is after 105 degree oven dry, in the weight of 550 degree calcinings after four hours.Final LOI clearance has reached 31.6 %, and it expands whole positive column to near organic sphere of action in the settling (0～1 cm) electrode.
Embodiment 3
Present embodiment illustrates organic effect experiment in this settling microorganism electrochemical device removal settling.
The settling of getting in domestic Taihu Lake, Jiangsu of 700 g places reactor, presses embodiment 1 described installation method with carbon felt anode (useful area 100 cm
2) be encased in the support that soft glass makes and fixing, be inserted in the settling.The stir shaft that will have screw-blade and cleaning shoe is inserted into the anode middle part, and then adds 500 mL water, stainless steel (304) negative electrode (useful area 60 cm
2) swim on the water surface, after settling microorganism electrochemical device connects resistance, voltage begins slow growth, after 20 days, rotation stir shaft (60 rev/mins) stirred settling 5 minutes, stop then, repeated every 14 days to stir, the peak voltage that obtains in this process is that 205 mV(see Fig. 3).Move after 60 days, the settling after the effect of taking-up settling microorganism electrochemical device according to the method for embodiment 2, is analyzed organic content in the settling
(LOI
), final LOI clearance has reached 26.6%, and it expands whole positive column to near organic sphere of action in the settling (0～1 cm) electrode.
Claims (9)
1. settling microorganism electrochemical device, mainly by negative electrode (1), anode (5), lead (4), resistance (3), and the stir shaft (2) that has screw-blade (8), support bar (7) and a cleaning shoe (6) is formed; Wherein will be arranged in the negative electrode (1) of aqueous phase, the anode (5) that is positioned at settling and resistance (3) by lead (4) and be together in series and form a loop, resistance (3) is between negative electrode (1) and anode (5); Stir shaft (2) vertically runs through water and settling, it is positioned at and is provided with screw-blade (8) on the sedimental end and distributes around stir shaft (2) on every side, and be vertically installed with at least two support bars (7) in its gap that is not taken by screw-blade (8), the other end of support bar (7) connects cleaning shoe (6), makes cleaning shoe (6) vertically parallel with stir shaft (2); The end that stir shaft (2) is positioned at aqueous phase vertically passes from negative electrode (1) and is positioned the center of whole device.
2. settling microorganism electrochemical device according to claim 1 is characterized in that also comprising support (9), and it is peripheral and anode (5) is fixing that support (9) is coated on anode (5).
3. settling microorganism electrochemical device according to claim 2 is characterized in that described support (9) is for cylindrical.
4. settling microorganism electrochemical device according to claim 1, the electrode materials that it is characterized in that described negative electrode (1) are stainless steel or carbon felt.
5. settling microorganism electrochemical device according to claim 4 is characterized in that described negative electrode (1) is an annular.
6. settling microorganism electrochemical device according to claim 1, the electrode materials that it is characterized in that described anode (5) is the carbon felt.
7. settling microorganism electrochemical device according to claim 6 is characterized in that described anode (5) is for cylindrical.
8. settling microorganism electrochemical device according to claim 1, the material that it is characterized in that described stir shaft (2), cleaning shoe (6), support bar (7) and screw-blade (8) are that polyvinyl chloride or hardness are 60～95 plastic material.
9. the application of settling microorganism electrochemical device according to claim 1 is characterized in that application method is:
A, electrode are installed
After anode being fixed in the inwall of support, the stir shaft that will have screw-blade, support bar and cleaning shoe places support, regulates support bar to change the length of cleaning shoe, so that cleaning shoe can touch anode; With this electrode that fixes, stir shaft be placed in the settling; Then negative electrode is placed settling upper strata aqueous phase, negative electrode is located thereby stir shaft passes from negative electrode.
B, circuit connect
Negative electrode, anode and resistance is cascaded with lead forms a loop, and resistance is between negative electrode and anode;
The operation of C, settling microorganism electrochemical device
After settling microorganism electrochemical device was enabled in 20 days, every 14 day time, 60 rev/mins of rotation stir shafts were to improve the organic mass transfer in positive column.
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| CN2010105185985A CN101962232B (en) | 2010-10-26 | 2010-10-26 | Sediment microorganism electrochemical device and application thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175730A (en) * | 2011-02-13 | 2011-09-07 | 中国科学院南京地理与湖泊研究所 | Device for measuring soil moisture |
| CN103224313A (en) * | 2013-04-26 | 2013-07-31 | 哈尔滨工业大学 | Sediment in-situ treatment device and method utilizing microbial fuel cell |
| CN104787900A (en) * | 2015-04-14 | 2015-07-22 | 东南大学 | Automatic control aeration system for strengthening both water and sediment purification based on electrochemistry |
| CN104829076A (en) * | 2015-05-05 | 2015-08-12 | 福州大学 | Resource treatment method of black-odor sediment in contaminated water |
| CN107265610A (en) * | 2017-08-10 | 2017-10-20 | 滨州学院 | A kind of synchronous sewage disposal and the Bioelectrochemical device of recovery of nitrogen and phosphorus |
| CN107445258A (en) * | 2017-09-08 | 2017-12-08 | 中国石油天然气集团公司 | A kind of water base rejected well drilling liquid Electrochemical adsorption processing unit and its technique |
| CN108662972A (en) * | 2018-05-12 | 2018-10-16 | 中国科学院南京地理与湖泊研究所 | A kind of sensor and monitoring method of monitoring water depth |
| CN108709920A (en) * | 2018-05-12 | 2018-10-26 | 中国科学院南京地理与湖泊研究所 | A kind of device and method of monitoring deposit height variation |
| CN108775858A (en) * | 2018-05-12 | 2018-11-09 | 中国科学院南京地理与湖泊研究所 | A kind of sensor and its application method of monitoring water depth |
| CN110803843A (en) * | 2019-11-21 | 2020-02-18 | 同济大学浙江学院 | Device and method for jointly degrading organic matters in water body sediment by utilizing waste scrap iron and sediment microbial fuel cell |
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| CN101841053A (en) * | 2009-05-12 | 2010-09-22 | 中国科学院南京地理与湖泊研究所 | Microbiological fuel cell (MFC) and application thereof in removing organisms from natural sediments |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175730A (en) * | 2011-02-13 | 2011-09-07 | 中国科学院南京地理与湖泊研究所 | Device for measuring soil moisture |
| CN102175730B (en) * | 2011-02-13 | 2013-06-19 | 中国科学院南京地理与湖泊研究所 | Device for measuring soil moisture |
| CN103224313A (en) * | 2013-04-26 | 2013-07-31 | 哈尔滨工业大学 | Sediment in-situ treatment device and method utilizing microbial fuel cell |
| CN103224313B (en) * | 2013-04-26 | 2014-01-22 | 哈尔滨工业大学 | Sediment in-situ treatment device and method utilizing microbial fuel cell |
| CN104787900A (en) * | 2015-04-14 | 2015-07-22 | 东南大学 | Automatic control aeration system for strengthening both water and sediment purification based on electrochemistry |
| CN104829076A (en) * | 2015-05-05 | 2015-08-12 | 福州大学 | Resource treatment method of black-odor sediment in contaminated water |
| CN107265610A (en) * | 2017-08-10 | 2017-10-20 | 滨州学院 | A kind of synchronous sewage disposal and the Bioelectrochemical device of recovery of nitrogen and phosphorus |
| CN107445258A (en) * | 2017-09-08 | 2017-12-08 | 中国石油天然气集团公司 | A kind of water base rejected well drilling liquid Electrochemical adsorption processing unit and its technique |
| CN107445258B (en) * | 2017-09-08 | 2020-09-08 | 中国石油天然气集团公司 | Electrochemical adsorption treatment device and process for water-based waste drilling fluid |
| CN108662972A (en) * | 2018-05-12 | 2018-10-16 | 中国科学院南京地理与湖泊研究所 | A kind of sensor and monitoring method of monitoring water depth |
| CN108709920A (en) * | 2018-05-12 | 2018-10-26 | 中国科学院南京地理与湖泊研究所 | A kind of device and method of monitoring deposit height variation |
| CN108775858A (en) * | 2018-05-12 | 2018-11-09 | 中国科学院南京地理与湖泊研究所 | A kind of sensor and its application method of monitoring water depth |
| CN108709920B (en) * | 2018-05-12 | 2023-08-11 | 中国科学院南京地理与湖泊研究所 | Device and method for monitoring sediment height change |
| CN108662972B (en) * | 2018-05-12 | 2024-04-05 | 中国科学院南京地理与湖泊研究所 | Sensor for monitoring depth of water body and monitoring method |
| CN110803843A (en) * | 2019-11-21 | 2020-02-18 | 同济大学浙江学院 | Device and method for jointly degrading organic matters in water body sediment by utilizing waste scrap iron and sediment microbial fuel cell |
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