CN101962232B - Sediment microorganism electrochemical device and application thereof - Google Patents
Sediment microorganism electrochemical device and application thereof Download PDFInfo
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- CN101962232B CN101962232B CN2010105185985A CN201010518598A CN101962232B CN 101962232 B CN101962232 B CN 101962232B CN 2010105185985 A CN2010105185985 A CN 2010105185985A CN 201010518598 A CN201010518598 A CN 201010518598A CN 101962232 B CN101962232 B CN 101962232B
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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
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 deposit microorganism electrochemical device, particularly a kind of have helical stir with scrape the deposit microorganism electrochemical device of mud function, belong to field of environment engineering.
Background technology
Along with expanding economy, the progress of society and the continuous growth of population, human increasing to demands for energy, global energy crisis is outstanding day by day.Simultaneously, the consumption significantly of fossil 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 resource can be provided again.And microbiological fuel cell is technological, has characteristics such as green, energy-saving and environmental protection because of it and just can satisfy such requirement, 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 organic substance that is prone to biochemical degradation, also can from the organic substance of some difficult degradations, obtain electric energy.Further discover; Organic substance in the microbiological fuel cell deposit also capable of using comes 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 deposit; Be connected through lead between negative electrode and the anode, and be connected to resistance.Organic substance is deposited indigenous microorganism oxidation Decomposition in the thing in the deposit near the anode region; The electronics that produces arrives negative electrode through external circuit again to anode, and proton is delivered to negative electrode through water-deposit interface; And generate water, thereby accomplish 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 deposit.The inventor finds when the microorganism electrochemical device of research prior art; With the electrode of graphite, find after the operation through a period of time, from the closer zone of anode (0～1 cm) as deposit microorganism electrochemical device; The content of TOC and easy oxidation of organic compounds descends fast in the deposit; And find the deposit after the effect of microorganism electrochemical device, its oxidation-reduction potential is shuffled, and can suppress to produce in the deposit process of methane and sulfur reduction.Compare existing sediment in-situ biological renovation method, need not add electron acceptor, oxygenate or microbe, but utilize indigenous microorganism in the bed mud, increase its microbial activity, quicken degradation of organic matter in the bed mud through additional electrodes.But at zone (> 3 cm away from anode) clearance of total organic matter is not high, and the transmission that organic substance anode in the deposit is described is the key factor that influences this type of deposit microorganism electrochemical device performance, becomes an important bottleneck of its development and application.
Summary of the invention
Deficiency and defective to prior art; Technical purpose of the present invention is to overcome organic substance mass transfer problem in the existing in prior technology deposit, and anode is long service time, the shortcoming of inefficiency; A kind of novel deposit microorganism electrochemical device is provided; Make this deposit microorganism electrochemical device can improve the organic substance mass transfer of anode region, improve anode electrode efficient, further enlarge deposit microorganism electrochemical device for sedimental repair.
For realizing technical purpose of the present invention, technical scheme of the present invention is following:
One, a kind of deposit microorganism electrochemical device, mainly by negative electrode, anode, lead, resistance, and the shaft composition that has helical blade, support bar and cleaning shoe; Wherein will be arranged in the negative electrode of aqueous phase, the anode that is positioned at deposit and resistance through lead and be together in series and form a loop, resistance is between negative electrode and anode; Shaft vertically runs through water and deposit; It is positioned at and is provided with helical blade on the sedimental end and distributes around shaft; And be vertically installed with at least two support bars in its gap that is not taken by helical blade; The other end of support bar connects cleaning shoe, makes cleaning shoe vertically parallel with shaft; The end that shaft is positioned at aqueous phase vertically passes from negative electrode and is positioned the center of whole device.
Deposit 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 material of negative electrode of the present invention is stainless steel or carbon felt; Running through because negative electrode is stirred axle, is annular therefore.
The electrode material of anode of the present invention is the carbon felt; And be cylindrical.
The material of shaft of the present invention, cleaning shoe, support bar and helical blade is that polyvinyl chloride or hardness are 60～95 plastic material.
Two, the application of deposit microorganism electrochemical device of the present invention.
Concrete application process is:
A, electrode are installed
After anode being fixed in the inwall of support, the shaft that will have helical blade, support bar and cleaning shoe places support, and the adjustable support bar is to change the length of cleaning shoe, so that cleaning shoe can touch anode; With this electrode that fixes, shaft be placed in the deposit; Then negative electrode is placed deposit upper strata aqueous phase, negative electrode is located thereby 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, deposit microorganism electrochemical device
After deposit microorganism electrochemical device was enabled in 20 days, every at a distance from 14 day time, 60 rev/mins of rotation shafts were to improve the organic mass transfer in anode region.
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 deposit and is covered; Can make deposit mix by the mode of screw propulsion again, and constantly will be rich in high organic deposit and contact with anode;
(2) deposit microorganism electrochemical apparatus structure of the present invention is simple, does not need too many maintenance, and construction and operating cost are low;
(3) have helical stir and scrape the deposit microorganism electrochemical device of mud function through of the present invention, can significantly improve electricity generation ability and deposit repair.
Description of drawings
Fig. 1 structural representation of the present invention
Wherein, 1-negative electrode; The 2-shaft; 3-resistance; The 4-lead; The 5-anode; The 6-cleaning shoe; The 7-support bar; The 8-helical 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
Through concrete embodiment technical scheme of the present invention is done further explanation below.
Embodiment 1
Present embodiment is explained concrete structure, application process and the operation principle of deposit microorganism electrochemical device of the present invention.
With reference to accompanying drawing 1, deposit microorganism electrochemical device, mainly by negative electrode 1, anode 5, lead 3, resistance 4, and shaft 2 compositions that have helical 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 deposit and resistance 4 through lead 3 and be together in series and form a loop, resistance 4 is between negative electrode 1 and anode 5; Shaft 2 vertically runs through water and deposit; It is positioned at and is provided with helical blade 8 on the sedimental end and distributes around shaft 2; And be vertically installed with at least two support bars 7 in its gap that is not taken by helical blade 8; The other end of support bar 7 connects cleaning shoe 6, makes that cleaning shoe 6 is vertically parallel with shaft 2; The end that 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 shaft 2 that will have helical 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 deposit upper strata, anode 5 and support 9 are placed deposit, pass the circular hole of shaft 2 from negative electrode 1.During use, negative electrode 1 and anode 5 with deposit microorganism electrochemical device are connected with resistance 4 through lead 3, and resistance 4 is between anode 5 and negative electrode 1.Near the anode 5 anaerobic bacteria, as electron acceptor, constantly with the oxidation operation near the deposit it, thereby transmission electronics and proton form electric current to negative electrode 1 with anode 5.Along with the carrying out in reaction time, the content of organics from anode 0～1 cm place constantly reduces, and the efficient of deposit microorganism electrochemical device begins to descend.Therefore at a distance from 14 days; Rotate shaft 2, drive cleaning shoe 6, can be scraped off the deposit of some low content of organics that adhere on the anode 5; Under the effect of the helical blade 8 that shaft 2 is with; The deposit that high content of organics is rich in the centre can be drawn close to the anode 5 of both sides, thereby improves the efficient of deposit microorganism electrochemical device, quickens organic degraded in the deposit.
This deposit microorganism electrochemical device of present embodiment explanation is removed organic effect experiment in the deposit.
The deposit of getting in domestic Taihu Lake, Jiangsu of 700 g places reactor, presses embodiment 1 described installation method with carbon felt anode (effective area 100 cm
2) be encased in the support that soft glass makes and fixing, be inserted in the deposit.The shaft that will have helical blade and cleaning shoe is inserted into the anode middle part, and then adds 500 mL water, carbon felt negative electrode (effective area 60 cm
2) swim on the water surface, after deposit microorganism electrochemical device connected resistance, voltage began slow growth; After 20 days, rotation shaft (60 rev/mins) stirs deposit, stops then; Every repeating at a distance from 14 days stirred, and the maximum voltage that obtains in this process is 300 mV (see figure 2)s.Move after 60 days, the deposit after the effect of taking-up deposit microorganism electrochemical device is analyzed the content of organic matter (LOI) in the deposit.
The content of organic matter is with calcination waste (LOI=(W
105-W
550)/W
105) * 100%) calculates, wherein W
105The weight of expression deposit after oven dry is spent the night under 105 degree, W
550The expression deposit 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 anode region to near organic sphere of action in the deposit (0～1 cm) electrode.
Embodiment 3
This deposit microorganism electrochemical device of present embodiment explanation is removed organic effect experiment in the deposit.
The deposit of getting in domestic Taihu Lake, Jiangsu of 700 g places reactor, presses embodiment 1 described installation method with carbon felt anode (effective area 100 cm
2) be encased in the support that soft glass makes and fixing, be inserted in the deposit.The shaft that will have helical blade and cleaning shoe is inserted into the anode middle part, and then adds 500 mL water, stainless steel (304) negative electrode (effective area 60 cm
2) swim on the water surface; After deposit microorganism electrochemical device connected resistance, voltage began slow growth, after 20 days; Rotation shaft (60 rev/mins) stirred deposit 5 minutes; Stop then, every repeating at a distance from 14 days stirred, and the maximum voltage that obtains in this process is 205 mV (see figure 3)s.Move after 60 days, the deposit after the effect of taking-up deposit microorganism electrochemical device according to the method for embodiment 2, is analyzed the content of organic matter in the deposit
(LOI
), final LOI clearance has reached 26.6%, and it expands whole anode region to near organic sphere of action in the deposit (0～1 cm) electrode.
Claims (5)
1. deposit microorganism electrochemical device, mainly by negative electrode (1), anode (5), lead (4), resistance (3), support (9), and the shaft (2) that has helical 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 deposit and resistance (3) through lead (4) and be together in series and form a loop, resistance (3) is between negative electrode (1) and anode (5); Shaft (2) vertically runs through water and deposit; It is positioned at and is provided with helical blade (8) on the sedimental end and distributes around shaft (2) on every side; And be vertically installed with at least two support bars (7) in its gap that is not taken by helical blade (8); The other end of support bar (7) connects cleaning shoe (6), makes cleaning shoe (6) vertically parallel with shaft (2); The end that shaft (2) is positioned at aqueous phase vertically passes from negative electrode (1) and is positioned the center of whole device; It is peripheral and anode (5) is fixing that support (9) is coated on anode (5); Described support (9) is cylindrical; Described negative electrode (1) is an annular; Described anode (5) is cylindrical.
2. deposit microorganism electrochemical device according to claim 1, the electrode material that it is characterized in that described negative electrode (1) are stainless steel or carbon felt.
3. deposit microorganism electrochemical device according to claim 1, the electrode material that it is characterized in that described anode (5) is the carbon felt.
4. deposit microorganism electrochemical device according to claim 1, the material that it is characterized in that described shaft (2), cleaning shoe (6), support bar (7) and helical blade (8) are that polyvinyl chloride or hardness are 60～95 plastic material.
5. the application of deposit microorganism electrochemical device according to claim 1 is characterized in that application process is:
A, electrode are installed
After anode being fixed in the inwall of support, the shaft that will have helical blade, support bar and cleaning shoe places support, and the adjustable support bar is to change the length of cleaning shoe, so that cleaning shoe can touch anode; With this electrode that fixes, shaft be placed in the deposit; Then negative electrode is placed deposit upper strata aqueous phase, negative electrode is located thereby 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, deposit microorganism electrochemical device
After deposit microorganism electrochemical device was enabled in 20 days, every at a distance from 14 day time, 60 rev/mins of rotation shafts were to improve the organic mass transfer in anode region.
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| CN2010105185985A CN101962232B (en) | 2010-10-26 | 2010-10-26 | Sediment microorganism electrochemical device and application thereof |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN104787900B (en) * | 2015-04-14 | 2016-11-02 | 东南大学 | What electrochemistry strengthened that water body and bed mud purify simultaneously automatically controls aerating system |
| CN104829076B (en) * | 2015-05-05 | 2016-09-07 | 福州大学 | A kind of method of black smelly bed mud recycling treatment in polluted water body |
| 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 |
| 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 |
| 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 |
| 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 |
| 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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| 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 |
| CN201592999U (en) * | 2009-07-20 | 2010-09-29 | 中环（中国）工程有限公司 | Micro electrolyzation waste water processor |
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Patent Citations (2)
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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 |
| CN201592999U (en) * | 2009-07-20 | 2010-09-29 | 中环（中国）工程有限公司 | Micro electrolyzation waste water processor |
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