CN209957483U - Split type wetland plant-microbial fuel cell coupling device - Google Patents
Split type wetland plant-microbial fuel cell coupling device Download PDFInfo
- Publication number
- CN209957483U CN209957483U CN201920655201.3U CN201920655201U CN209957483U CN 209957483 U CN209957483 U CN 209957483U CN 201920655201 U CN201920655201 U CN 201920655201U CN 209957483 U CN209957483 U CN 209957483U
- Authority
- CN
- China
- Prior art keywords
- plant
- fuel cell
- oxygen
- microbial fuel
- denitrification
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
Landscapes
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The utility model relates to a split type wetland plant-microbial fuel cell coupling device, with plant and battery anode, the cathode separation, nitrify and the denitrification is gone on around two local divisions of difference, waste water flows out to be led to aerobic reactor after P-MFC anodic oxidation, utilize water free oxygen and plant roots to secrete oxygen and accomplish nitration process, the negative pole that flows into P-MFC afterwards carries out the electrochemistry denitrification under the oxygen deficiency condition, thereby the influence of oxygen to the negative pole denitrification process has been avoided, secrete oxygen with plant roots and promote the effect maximize of nitrifying/denitrifying. The contradiction between the promotion of the root system oxygen secretion to the nitrification and the inhibition of the denitrification can be well solved by adding the external cathode nitrification reactor of the plant.
Description
Technical Field
The utility model belongs to plant microbial fuel cell field, concretely relates to split type wetland plant-microbial fuel cell that can improve denitrogenation effect.
Background
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be taken as an acknowledgement or any form of suggestion that this information constitutes prior art that is already known to a person skilled in the art.
Currently, ammonia nitrogen has become an important indicator of water pollution, nitrogen in water exists in the form of organic nitrogen and inorganic nitrogen, and industrial wastewater, agricultural wastewater and domestic sewage are main sources of the nitrogen. With the development of human society, the concentration of ammonia nitrogen in water body is higher and higher, the eutrophication of water body is aggravated, the aquatic animals are endangered, the ecological balance is destroyed, the human health is finally endangered, and the serious economic loss is caused.
A plant-microbial fuel cell (P-MFC) is a new sewage treatment process, and can complete the degradation of nitrogen and generate electric energy through a series of microbial circulation processes such as mineralization, nitrification and denitrification. The currently constructed P-MFC mainly comprises two types, one is that a plant root region is used as an anode system of a battery, and the root region secretion is utilized to solve the fuel problem of the MFC; the other is to construct a biological cathode type microbial fuel cell by using wetland plants, which is essentially to construct an aerobic type biological cathode microbial fuel cell by using root system oxygen secretion, and synchronously finish the nitrification and denitrification processes at the cathode. In the cathode, although the micro-aerobic environment of the root system promotes nitrification, O is produced by plants2Oxidation reduction potential ratio of (1)3 -High, O2Will react with NO3 -Compete for protons and electrons and inhibit NO3 -The denitrification of (2) reduces the denitrification rate. The contradiction between the nitrification promotion and denitrification inhibition by the root system oxygen secretion cannot be solved, and the promotion effect of the plant oxygen secretion on the denitrification cannot be exerted to the maximum extent.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problems, the utility model provides a split type wetland plant-microbial fuel cell coupling device. The problem can be well solved by adding the external cathode nitration reactor of the plant, the plant is separated from the anode and the cathode of the battery, the nitration and the denitrification are respectively carried out in two different places, the wastewater flows out after the anode oxidation of the P-MFC and is guided to the aerobic reactor, the nitration is completed by utilizing the free oxygen of the water body and the oxygen secreted by the plant root system, and then the electrochemical denitrification is carried out by the cathode flowing into the P-MFC under the anoxic condition, thereby avoiding the influence of the oxygen on the cathode denitrification process, and maximizing the functions of promoting the nitration and the denitrification by the oxygen secreted by the plant root system.
In order to realize the technical purpose, the utility model discloses a technical scheme as follows:
a split wetland plant-microbial fuel cell coupling device, comprising: anode chamber, cathode chamber, outside aerobic reaction ware, the anode chamber links to each other through cation exchange membrane with one side of cathode chamber, the anode chamber is provided with water inlet and delivery port, the delivery port links to each other with outside aerobic reaction ware's water inlet, outside aerobic reaction ware's delivery port links to each other with the water inlet of cathode chamber, the cathode chamber still is provided with the delivery port, anode chamber and cathode chamber all are provided with graphite electrode, and are equipped with load resistance between two electrodes. By utilizing the split structure, the nitrification process and the denitrification process can be separated, so that the influence of the oxygen secretion of the root system on the denitrification efficiency of the P-MFC is solved.
In some embodiments, one side of the anode chamber is attached to the external aerobic reactor, and the water outlet of the anode chamber is higher than the water inlet of the external aerobic reactor and is located on the attached side wall. The power for wastewater flowing comes from the gravitational potential energy of the wastewater when the wastewater is transferred between the electrode chamber and the aerobic reactor, so that the consumption of energy sources can be greatly reduced, and the energy-saving effect is achieved.
In some embodiments, one side of the external aerobic reactor is attached to one side of the cathode chamber, and the water outlet of the external aerobic reactor is higher than the water inlet of the cathode chamber and is positioned on the attached side wall. The height difference between the two is utilized to make the wastewater flow, reduce energy consumption and reduce unnecessary pipeline connection.
In some embodiments, a resistance is disposed between the electrodes. The current is effectively limited and regulated through the resistor, and the short circuit phenomenon is avoided when the instantaneous current is overlarge.
The current of the plant power generation system is commonly restricted by a plurality of factors such as the internal structure of the system, the growth states of plants and microorganisms, and the operating conditions. The difference of the generated current of different plant power generation systems is large. Therefore, in some embodiments, the external aerobic reactor is a hygrophyte, such as reed, canna, calamus, etc., to improve the activity of the rhizosphere microorganisms of the plant and promote the improvement of the power generation performance of the system.
In some embodiments, the anode chamber is inoculated with anaerobic digested sludge of an urban domestic sewage treatment plant, and the inoculation amount is 50-200 mg/L;
in some embodiments, the cathode chamber is inoculated with return sludge of a secondary sedimentation tank of a municipal domestic sewage treatment plant, the inoculation amount is 50-200mg/L, and acetic acid is used as a denitrification carbon source for acclimatization.
The beneficial effects of the utility model reside in that:
(1) the utility model discloses the novel P-MFC that constitutes can realize that carbon and nitrogen get rid of simultaneously, and the negative pole utilizes the nitrate to accomplish reduction reaction for electron acceptor, utilizes denitrifying bacteria, can handle the lower waste water of COD concentration, also can reduce the required running cost of negative pole aeration.
(2) The utility model discloses a there is the difference in height between anode chamber, outside aerobic reaction ware, the cathode chamber, and the usable gravitational potential energy of waste water realizes flowing to reach energy-conserving effect.
(3) The utility model discloses a P-MFC does not have the damage to plant itself, can degrade sewage and can produce the electric energy simultaneously, the utility model discloses realize the separation of plant and battery positive pole, negative pole, can further promote the nitrogen degradation under the prerequisite that does not influence the electrogenesis, have the significance to alleviating the energy crisis, on the promotion of sewage irrigation efficiency, reuse on town domestic sewage, have extensive application prospect in the protection to artificial wetland and natural wetland.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.
FIG. 1 is a schematic diagram of the apparatus of example 1. The device comprises an external aerobic reactor 1, a water inlet and outlet 2, an anode chamber 3, a graphite electrode 4, an ion exchange membrane 5, a cathode chamber 6, a sewage inlet 7 and a sewage outlet 8.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As introduced in the background art, the contradiction between the promotion of the oxygen secretion of the root system to nitrification and the inhibition of denitrification is not solved, and the problem that the promotion of the oxygen secretion of rice to denitrification cannot be exerted to the maximum extent is solved. Therefore, the utility model provides a split type wetland plant-microbial fuel cell. The constructed split wetland plant-microbial fuel cell separates plants from the anode and the cathode of the cell, and the aerobic reaction stage is separated from the cell reaction, so that the influence of oxygen on the cathode denitrification process is avoided, and the denitrification effect is improved on the premise of ensuring certain power generation capacity.
The technical solution of the present invention will be described in detail with reference to the following examples. In the following examples, the cation exchange membrane is an Ultrex CMI-7000 type cation exchange membrane.
Example 1:
a split wetland plant-microbial fuel cell coupling device, comprising: anode chamber 3, cathode chamber 6, outside aerobic reaction ware 1, anode chamber 3 links to each other through cation exchange membrane 5 with one side of cathode chamber 6, anode chamber 3 is provided with water inlet 7 and delivery port 2, delivery port 2 links to each other with the water inlet of outside aerobic reaction ware, the delivery port 2 of outside aerobic reaction ware links to each other with the water inlet of cathode chamber, the cathode chamber still is provided with delivery port 8, anode chamber 3 and cathode chamber 6 all are provided with graphite electrode 4, and are equipped with load resistance between two electrodes 4.
The utility model is provided with two right-angle organic glass frames with different heights as an anode chamber and a cathode chamber, and the internal sizes are 14 multiplied by 12 multiplied by 35 and 14 multiplied by 12 multiplied by 15 centimeters in sequence; the external aerobic reactor consists of a tubular fixed bed reactor, and the internal dimension is 28 multiplied by 12 multiplied by 30 cm. Granular graphite with a diameter of 2 to 6 mm is filled in the electrode chambers and the external aerobic reactor as electrodes, and external connection is ensured by placing a graphite rod in each electrode chamber. A rubber sheet is inserted between every two chambers to ensure sealing.
The anode chamber is inoculated with anaerobic digested sludge of an urban domestic sewage treatment plant, and the inoculation amount is 100 mg/L;
the cathode chamber is inoculated with return sludge of a secondary sedimentation tank of an urban domestic sewage treatment plant, the inoculation amount is 100mg/L, and acetic acid is adopted as a denitrification carbon source for domestication.
The wetland plant in the external aerobic reactor is reed, and the hydraulic load of the wetland is 50-80L/(m)2·d)。
The utility model discloses the operational mode of handling waste water is waste water and carries the positive pole that at first gets into microbial fuel cell by water inlet 7 through the water pump, takes place organic matter oxidation, collects the electron through the positive pole electrode. Then, the wastewater is conveyed to an aerobic reactor compounded by external plants due to the height difference to carry out an aerobic nitrification stage. The wastewater is finally transferred to a cathode where nitrate reduction takes place. Electrons generated at the anode are transferred to the cathode through an external resistor, and protons diffuse to the cathode through a Cation Exchange Membrane (CEM).
The detection result shows that: when rural or urban domestic sewage is used as the wastewater with low carbon-nitrogen ratio, the COD removal rate can reach 95% when the COD concentration in the wastewater reaches more than 200mg/l, and the electrogenesis power is generatedThe specific density can reach 85 +/-7 mw/m2。
Example 2:
a split wetland plant-microbial fuel cell coupling device, comprising: anode chamber 3, cathode chamber 6, outside aerobic reaction ware 1, anode chamber 3 links to each other through ion exchange membrane 5 with one side of cathode chamber 6, anode chamber 3 is provided with water inlet 7 and delivery port 2, delivery port 2 links to each other with the water inlet of outside aerobic reaction ware, the delivery port 2 of outside aerobic reaction ware links to each other with the water inlet of cathode chamber, the cathode chamber still is provided with delivery port 8, anode chamber 3 and cathode chamber 6 all are provided with graphite electrode 4, and are equipped with load resistance between two electrodes 4.
One side of the anode chamber 3 is attached to the external aerobic reactor 1, and the water outlet of the anode chamber 3 is higher than the water inlet of the external aerobic reactor 1 and is positioned on the attached side wall. The power for wastewater flowing comes from the gravitational potential energy of the wastewater when the wastewater is transferred between the electrode chamber and the aerobic reactor, so that the consumption of energy sources can be greatly reduced, and the energy-saving effect is achieved.
Example 3:
a split wetland plant-microbial fuel cell coupling device, comprising: anode chamber 3, cathode chamber 6, outside aerobic reaction ware 1, anode chamber 3 links to each other through ion exchange membrane 5 with one side of cathode chamber 6, anode chamber 3 is provided with water inlet 7 and delivery port 2, delivery port 2 links to each other with the water inlet of outside aerobic reaction ware, the delivery port 2 of outside aerobic reaction ware links to each other with the water inlet of cathode chamber, the cathode chamber still is provided with delivery port 8, anode chamber 3 and cathode chamber 6 all are provided with graphite electrode 4, and are equipped with load resistance between two electrodes 4.
One side of the external aerobic reactor 1 is attached to one side of the cathode chamber 6, and the water outlet of the external aerobic reactor 1 is higher than the water inlet of the cathode chamber 6 and is positioned on the attached side wall. The height difference between the two is utilized to make the wastewater flow, reduce energy consumption and reduce unnecessary pipeline connection.
Example 4:
a split wetland plant-microbial fuel cell coupling device, comprising: anode chamber 3, cathode chamber 6, outside aerobic reaction ware 1, anode chamber 3 links to each other through ion exchange membrane 5 with one side of cathode chamber 6, anode chamber 3 is provided with water inlet 7 and delivery port 2, delivery port 2 links to each other with the water inlet of outside aerobic reaction ware, the delivery port 2 of outside aerobic reaction ware links to each other with the water inlet of cathode chamber, the cathode chamber still is provided with delivery port 8, anode chamber 3 and cathode chamber 6 all are provided with graphite electrode 4, and two electrodes 4 link to each other.
A resistor is arranged between the electrodes 4. The current is effectively limited and regulated through the resistor, and the short circuit phenomenon is avoided when the instantaneous current is overlarge.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that the technical solutions described in the foregoing embodiments can be modified or partially replaced by equivalent solutions. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.
Claims (5)
1. A split wetland plant-microbial fuel cell coupling device is characterized by comprising: anode chamber, cathode chamber, outside aerobic reaction ware, the anode chamber links to each other through ion exchange membrane with one side of cathode chamber, the anode chamber is provided with water inlet and delivery port, the delivery port links to each other with outside aerobic reaction ware's water inlet, outside aerobic reaction ware's delivery port links to each other with the water inlet of cathode chamber, the cathode chamber still is provided with the delivery port, anode chamber and cathode chamber all are provided with graphite electrode, and two electrodes link to each other.
2. The split-type wetland plant-microbial fuel cell coupling device of claim 1, wherein one side of the anode chamber is attached to the external aerobic reactor, and the water outlet of the anode chamber is higher than the water inlet of the external aerobic reactor and is positioned on the attached side wall.
3. The split-type wetland plant-microbial fuel cell coupling device of claim 1, wherein one side of the external aerobic reactor is attached to one side of the cathode chamber, and the water outlet of the external aerobic reactor is higher than the water inlet of the cathode chamber and is positioned on the attached side wall.
4. The split-type wetland plant-microbial fuel cell coupling device of claim 1, wherein a resistor is arranged between the electrodes.
5. The split-type wetland plant-microbial fuel cell coupling device of claim 1, wherein the external aerobic reactor is a hydrophyte.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920655201.3U CN209957483U (en) | 2019-05-08 | 2019-05-08 | Split type wetland plant-microbial fuel cell coupling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920655201.3U CN209957483U (en) | 2019-05-08 | 2019-05-08 | Split type wetland plant-microbial fuel cell coupling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209957483U true CN209957483U (en) | 2020-01-17 |
Family
ID=69245018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920655201.3U Expired - Fee Related CN209957483U (en) | 2019-05-08 | 2019-05-08 | Split type wetland plant-microbial fuel cell coupling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209957483U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114349181A (en) * | 2022-01-05 | 2022-04-15 | 郑州轻工业大学 | Non-energy-consumption oxygenation constructed wetland system, operation method and application |
-
2019
- 2019-05-08 CN CN201920655201.3U patent/CN209957483U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114349181A (en) * | 2022-01-05 | 2022-04-15 | 郑州轻工业大学 | Non-energy-consumption oxygenation constructed wetland system, operation method and application |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102276064B (en) | Anaerobic-aerobic integrated microbial fuel cell wastewater treatment system | |
| CN103145240B (en) | Synchronous electricity generating method and device for anaerobic biological treatment of high concentrated organic wastewater | |
| CN108275776B (en) | Anaerobic fluidized bed serial constructed wetland type microbial fuel cell device and method | |
| CN105152351A (en) | Photoelectric artificial wetland and application thereof | |
| WO2022199096A1 (en) | Electrochemical nitrogen and phosphorus removal device and method | |
| CN104787977A (en) | Continuous flow integrated electrode bio-membrane reactor and nitrate removal technology | |
| CN112607864A (en) | Electrochemical performance-enhanced bacteria-algae membrane aeration biomembrane reactor system and application thereof | |
| CN110668556B (en) | Visible light catalysis coupling bioelectrochemical wetland system and application thereof | |
| CN112573667A (en) | Sewage treatment device and method based on phycomycete symbiotic electrochemical system | |
| CN106986460B (en) | Highly integrated back-flow type bioelectrochemical wastewater treatment device and wastewater treatment method | |
| CN105565494A (en) | Membrane-aerated bio-membrane and bioelectrochemical coupling system and application thereof | |
| CN106848360A (en) | A kind of three anodes share list cathode type denitrification microorganism fuel cell | |
| CN109912145B (en) | Aerobic granular sludge power generation device | |
| CN206451764U (en) | A kind of MFC reactors of synchronous nitration short-cut denitrification | |
| CN106587344B (en) | Anaerobic built-in rusty iron chip reactor for efficiently removing ammonia nitrogen and process for treating ammonia nitrogen wastewater by using anaerobic built-in rusty iron chip reactor | |
| CN205740505U (en) | Microorganism electrochemical is utilized to process the device of sewage | |
| CN214528620U (en) | Rural domestic sewage treatment system based on VSFCW-MFC technology | |
| CN209957483U (en) | Split type wetland plant-microbial fuel cell coupling device | |
| CN107381811B (en) | Microbial dual-source electrochemical sewage reactor and method for treating low C/N urban sewage | |
| CN108751381A (en) | The method of Zero-valent Iron reduction coupling microbiological fuel cell degrading azoic dye waste water | |
| CN104577171A (en) | Efficient dephosphorization and nitrification microbial fuel cell with external magnetic field | |
| CN109231673B (en) | A/O combined micro-electric field-Fe/C reinforced dephosphorization device and application thereof | |
| CN214829759U (en) | Multi-stage AO biomembrane sewage treatment device | |
| CN206901879U (en) | A kind of bioelectrochemistry wastewater treatment equipment of highly integrated reverse-flow type | |
| CN213388232U (en) | Electric-enhanced bioretention system for removing low-concentration antibiotics |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200117 |