CN111704244A - External carbon source combined microbial fuel cell type subsurface flow constructed wetland system - Google Patents
External carbon source combined microbial fuel cell type subsurface flow constructed wetland system Download PDFInfo
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- CN111704244A CN111704244A CN202010747571.7A CN202010747571A CN111704244A CN 111704244 A CN111704244 A CN 111704244A CN 202010747571 A CN202010747571 A CN 202010747571A CN 111704244 A CN111704244 A CN 111704244A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 35
- 239000000446 fuel Substances 0.000 title claims abstract description 17
- 230000000813 microbial effect Effects 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 238000001914 filtration Methods 0.000 claims abstract description 16
- 238000005273 aeration Methods 0.000 claims abstract description 10
- 230000001376 precipitating effect Effects 0.000 claims abstract description 7
- 230000002572 peristaltic effect Effects 0.000 claims abstract description 6
- 239000000945 filler Substances 0.000 claims abstract description 4
- 239000011521 glass Substances 0.000 claims description 4
- 238000001556 precipitation Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 2
- 239000010865 sewage Substances 0.000 abstract description 19
- 230000000694 effects Effects 0.000 abstract description 7
- 238000010248 power generation Methods 0.000 abstract description 2
- 238000004062 sedimentation Methods 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- 241000196324 Embryophyta Species 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 239000003344 environmental pollutant Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 229910002651 NO3 Inorganic materials 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 244000205574 Acorus calamus Species 0.000 description 1
- 235000011996 Calamus deerratus Nutrition 0.000 description 1
- 235000005273 Canna coccinea Nutrition 0.000 description 1
- 240000008555 Canna flaccida Species 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 240000003826 Eichhornia crassipes Species 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 240000001398 Typha domingensis Species 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/005—Combined electrochemical biological processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/16—Biochemical fuel cells, i.e. cells in which microorganisms function as catalysts
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Microbiology (AREA)
- Organic Chemistry (AREA)
- Water Supply & Treatment (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Biodiversity & Conservation Biology (AREA)
- General Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Manufacturing & Machinery (AREA)
- Biochemistry (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Biotechnology (AREA)
- Botany (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention relates to the technical field of environment-friendly water treatment, and provides an external carbon source combined microbial fuel cell type subsurface flow constructed wetland system which comprises a water distribution barrel and a reactor communicated with a peristaltic pump, wherein the reactor comprises a water inlet pipe, a water distribution area, a filtering and precipitating area, a carbon source adding area, an anode, an anoxic area, a cathode, a water collecting area and a water outlet pipe which are sequentially arranged from left to right; the anode and the cathode are respectively connected with two ends of the load through external leads; an aeration pipe is arranged in the cathode area and is connected with an aeration pump; the filter sedimentation zone, the anode zone, the anoxic zone and the cathode zone form an artificial wetland by internal fillers and wetland plants at the upper part. The system couples the subsurface flow constructed wetland and the microbial fuel cell and is connected in series with a carbon source adding area, so that the power generation is realized while the sewage denitrification effect is improved.
Description
Technical Field
The invention belongs to the technical field of environmental protection water treatment, is mainly used for deep denitrification treatment of sewage, and particularly relates to an external carbon source combined microbial fuel cell type subsurface flow constructed wetland system.
Background
Nitrogen is an important factor causing water eutrophication and is also one of important indexes for controlling water pollution. If the sewage does not undergo deep denitrification treatment, the sewage does not reach the surface water or urban inland river water quality standard, and effluent with certain environmental risk still exists, so that the environment is subjected to larger pollution load and ecological toxicity, and the improvement of the removal effect of nitrogen pollutants in the sewage is of great importance. In the denitrification reaction stage, a carbon source is an indispensable factor, but the problem of insufficient carbon source in the denitrification stage limits the removal effect of nitrogen pollutants, so that an additional carbon source with good biodegradability is required to be added to enhance the denitrification effect of the sewage.
Constructed Wetlands (CW) are taken as a typical ecological treatment technology, pollutants in sewage are removed mainly by utilizing the synergistic action among substrates, microorganisms and plants, and meanwhile, the pollutants in the sewage can promote the growth of the plants, so that the reclamation and the harmlessness of the sewage are realized. Microbial Fuel Cells (MFCs) are a novel sewage purification technology that utilizes microorganisms to catalytically degrade organic and inorganic substances while generating electrical energy. In recent years, a Microbial fuel cell-constructed wetland coupled system (MFC-CW) is constructed by simultaneously combining the structural characteristics of constructed wetlands on the basis of Microbial fuel cells, and the system synchronously realizes the improvement of sewage treatment effect and the generation of electric energy and realizes the resource utilization of sewage. As a novel and promising sewage treatment biological power generation technology, the method is more and more concerned by people.
Disclosure of Invention
The technical problem is as follows: the invention aims to provide an external carbon source combined microbial fuel cell type subsurface flow constructed wetland system, which couples a microbial fuel cell with a subsurface flow constructed wetland and synchronously realizes the enhancement of sewage denitrification and electrogenesis efficiency.
The technical scheme is as follows: an external carbon source combined microbial fuel cell type subsurface flow constructed wetland system comprises a water distribution barrel and a reactor communicated with a peristaltic pump, wherein the reactor comprises a water inlet pipe, a water distribution area, a filtering and settling area, a carbon source adding area, an anode, an anoxic area, a cathode, a water collecting area and a water outlet pipe which are sequentially arranged from left to right; the anode and the cathode are respectively connected with two ends of the load through external leads; an aeration pipe is arranged in the cathode area and is connected with an aeration pump; an organic glass baffle is arranged on the surface of the carbon source adding area; the filter sedimentation zone, the anode zone, the anoxic zone and the cathode zone form an artificial wetland by internal fillers and wetland plants at the upper part.
The anode and the cathode adopt carbon fiber brushes, the anode is vertically inserted into the anode region, the cathode is vertically inserted into the cathode region, the anode and the cathode are connected by a titanium lead, part of leads in the solution are wrapped by epoxy resin to prevent short circuit, and the connection point is subjected to insulation sealing treatment. A carbon source adding area is arranged between the filtering and settling area and the anode area, so that the adding of an external carbon source is facilitated, and an organic glass baffle is arranged on the surface of the carbon source adding area to reduce the circulation of oxygen. And sieve pores are uniformly arranged on the plate body among the water distribution area, the filtering and precipitating area, the carbon source adding area, the anode area, the anoxic area, the cathode area and the water collection area. The wetland plant is one or more of water hyacinth, reed, canna, cattail, calamus and the like. And gravel with the particle size of 10-12mm is filled in the water distribution area. The filtering and settling zone is filled with gravels with the grain diameter of 6-8 mm. The anode region and the cathode region are filled with activated carbon with the grain diameter of 5-8 mm. The anoxic zone is filled with sand with the grain diameter of 0.5-2 mm.
The technical effects are as follows: the invention has the following characteristics:
1. the invention integrates the performance advantages of the constructed wetland and the microbial fuel cell, and arranges the water distribution area, the filtering and precipitating area, the carbon source adding area, the anode area, the anoxic area, the cathode area and the water collection area in series, thereby generating electric energy while enhancing the denitrification of the sewage and realizing the high-efficiency removal and resource utilization of nitrogen elements in the sewage.
2. The system of the invention is additionally provided with the carbon source adding area between the filtering and settling area and the anode area, which is beneficial to adding an external carbon source to improve the sewage denitrification effect and is beneficial to cleaning residual substances to prevent the system from being blocked.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of an external carbon source combined microbial fuel cell type subsurface flow constructed wetland system of the invention.
Among them are: the device comprises a water distribution barrel 1, a peristaltic pump 2, a water inlet pipe 3, a water distribution zone 4, a filtering and precipitating zone 5, a carbon source adding zone 6, an anode zone 7, an anode 8, an anoxic zone 9, a cathode zone 10, a cathode 11, a water collecting zone 12, a water outlet pipe 13, wetland plants 14, an external lead 15, a load 16, an aeration pipe 17, an aeration pump 18 and an organic glass baffle 19.
Detailed Description
An external carbon source combined microbial fuel cell type subsurface flow constructed wetland system comprises a water distribution barrel 1 and a reactor communicated with a peristaltic pump 2, wherein the reactor comprises a water inlet pipe 3, a water distribution zone 4, a filtering and precipitating zone 5, a carbon source adding zone 6, an anode zone 7, an anode 8, an anoxic zone 9, a cathode zone 10, a cathode 11, a water collecting zone 12 and a water outlet pipe 13 which are sequentially arranged from left to right; the anode 8 and the cathode 11 are respectively connected with two ends of a load 16 through external leads 15; an aeration pipe 17 is arranged in the cathode region 10 and is connected with an aeration pump 18; the artificial wetland consists of the internal fillers of the filtration and precipitation zone 5, the anode zone 7, the anoxic zone 9 and the cathode zone 10 and the wetland plants 14 at the upper part.
The simulated sewage is put into a water distribution barrel 1 and flows into the reactor through a water inlet pipe 3 under the action of a peristaltic pump 2. The sewage enters the water distribution zone 4, then flows into the filtering and precipitating zone 5, is subjected to primary filtering and precipitation, then is mixed with an external liquid carbon source or a solid carbon source in the carbon source adding zone 6, then enters the anode zone 7 for ammoniation and denitrification, then enters the anoxic zone 9 for promoting ammoniation and denitrification, then enters the cathode zone 10 for nitration reaction under the condition of sufficient oxygen, and nitrate directly obtains electrons from the cathode by taking microorganisms as a catalyst and is reduced into nitrogen. And finally flows into the water collection area 12 and flows out of the water outlet pipe 13.
The organic matter in the anode region 7 is degraded to generate electrons, the electrons are transferred to the anode 8 and reach the cathode 11 in the cathode region 10 through the load 16 by the external lead 15, the electrons are combined with the electron acceptor nitrate of the cathode 11 to be reduced into nitrogen, and as the electrons are continuously generated and transferred, a loop is formed to generate electric energy.
Claims (3)
1. An external carbon source combined microbial fuel cell type subsurface flow constructed wetland system is characterized by comprising a water distribution barrel (1) and a reactor communicated with a peristaltic pump (2), wherein the reactor comprises a water inlet pipe (3), a water distribution area (4), a filtering and settling area (5), a carbon source adding area (6), an anode area (7), an anode (8), an anoxic area (9), a cathode area (10), a cathode (11), a water collecting area (12) and a water outlet pipe (13) which are sequentially arranged from left to right; the anode (8) and the cathode (11) are respectively connected with two ends of a load (16) through an external lead (15); an aeration pipe (17) is arranged in the cathode region (10) and is connected with an aeration pump (18); the artificial wetland consists of the internal fillers of the filtration and precipitation zone (5), the anode zone (7), the anoxic zone (9) and the cathode zone (10) and wetland plants (14) at the upper part.
2. The impressed carbon source combined microbial fuel cell type subsurface flow constructed wetland system of claim 1, wherein the anode (8) is vertically inserted into the anode region (7), the cathode (11) is vertically inserted into the cathode region (10), and the organic glass baffle plate (19) is arranged on the surface of the carbon source adding region (6).
3. The impressed carbon source combined microbial fuel cell type subsurface flow constructed wetland system of claim 1, wherein a carbon source adding area (6) is arranged between the filtering and settling area (5) and the anode area (7) to facilitate the adding of the impressed carbon source; and sieve pores are uniformly arranged on the plate body among the water distribution area (4), the filtering and precipitating area (5), the carbon source adding area (6), the anode area (7), the anoxic area (9), the cathode area (10) and the water collection area (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010747571.7A CN111704244A (en) | 2020-07-29 | 2020-07-29 | External carbon source combined microbial fuel cell type subsurface flow constructed wetland system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010747571.7A CN111704244A (en) | 2020-07-29 | 2020-07-29 | External carbon source combined microbial fuel cell type subsurface flow constructed wetland system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111704244A true CN111704244A (en) | 2020-09-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010747571.7A Pending CN111704244A (en) | 2020-07-29 | 2020-07-29 | External carbon source combined microbial fuel cell type subsurface flow constructed wetland system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111704244A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111825270A (en) * | 2019-04-19 | 2020-10-27 | 南京林业大学 | Subsurface flow type constructed wetland and microbial fuel cell combined system |
| CN113024039A (en) * | 2021-03-19 | 2021-06-25 | 南京市市政设计研究院有限责任公司 | Bioelectricity-enhanced subsurface flow wetland system and pollutant treatment method |
-
2020
- 2020-07-29 CN CN202010747571.7A patent/CN111704244A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111825270A (en) * | 2019-04-19 | 2020-10-27 | 南京林业大学 | Subsurface flow type constructed wetland and microbial fuel cell combined system |
| CN113024039A (en) * | 2021-03-19 | 2021-06-25 | 南京市市政设计研究院有限责任公司 | Bioelectricity-enhanced subsurface flow wetland system and pollutant treatment method |
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Application publication date: 20200925 |