CN205088013U - Integrated vertical -flow constructed wetland coupling microorganism electrolytic bath enhanced nitrogen removal's device - Google Patents
Integrated vertical -flow constructed wetland coupling microorganism electrolytic bath enhanced nitrogen removal's device Download PDFInfo
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- CN205088013U CN205088013U CN201520871731.3U CN201520871731U CN205088013U CN 205088013 U CN205088013 U CN 205088013U CN 201520871731 U CN201520871731 U CN 201520871731U CN 205088013 U CN205088013 U CN 205088013U
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The utility model discloses an integrated vertical -flow constructed wetland coupling microorganism electrolytic bath enhanced nitrogen removal's device, the device includes: upper portion non -conductive filler layer A, positive pole conductive filler layer, the packing layer, negative pole conductive filler layer, non -conductive filler layer B, go out the water collector pipe, downstream pond inner anode conductive filler layer communicates the packing layer with the bottom respectively, upper portion non -conductive filler layer A links to each other, negative pole conductive filler layer communicates the packing layer with the bottom respectively in the upstream pond, upper portion non -conductive filler layer B links to each other, wetland plant plants among upper portion non -conductive filler layer A and the upper portion conductive filler layer B, the positive pole collecting electrode, the negative pole collecting electrode pass through the wire respectively with DC power supply's positive pole, the negative pole connects to form closed -loop, positive pole collecting electrode and negative pole collecting electrode are placed respectively at positive pole conductive filler layer and negative pole conductive filler in situ. Simple structure, convenient to use can show and improve the carbon source and lack under the condition denitrogenation effect of integrated vertical -flow constructed wetland to the high nitrogen sewage of low carbon.
Description
Technical field
The utility model belongs to sewage treatment area, is specifically related to the device of a kind of composite vertical current artificial wetland coupling microorganism electrolysis cell strengthened denitrification, is particularly useful for the waste water that contaminated surface water and Sewage Plant secondary effluent etc. need advanced treatment.
Background technology
In the water pollution of current China, nitrogen rises to principal pollutant gradually, a large amount of nitric wastewaters, and unprocessed or process not exclusively just enters water body, causes the eutrophication of water body.Therefore, the removal of nitrogen is one of urgent need to solve the problem in current sewage treatment area, and the investigation and application of denitride technology causes the extensive concern of people.In actual sewage biological denitrification process, only have when C/N ratio is greater than 6, the needs of denitrifying bacteria to carbon source could be met, reach the object (ChiuY.C. of complete denitrogenation, andChungM.S., DeterminationofoptimalCOD/nitrateratioforbiologicaldenit rification, InternationalBiodeterioration & Biodegradation, 2003, pp.43-49.).In Practical Project, low C/N in order to reach the efficient removal of nitrogen than sewage, normally adds the organism such as methyl alcohol or ethanol, both consumes limited resources like this, turn increase operation and maintenance cost.
Artificial wet land system has construction and working cost low (being only the 1/10-1/2 of traditional B-grade sewage treatment plant), it is simple to safeguard, treatment effect is good, widely applicable, the advantage such as adaptable to load variations, therefore process (the Wu Zhenbin of various sewage is widely used in, composite vertical current artificial wetland, Science Press, Beijing, 2008.).The cutting mechanisms more complicated of nitrogen in artificial swamp, that wetland plant, matrix and microorganism are by physics, chemistry and biological synergistic result, wherein the nitrification and denitrification of microorganism is main Approach of Removal of Nitrogen, and the carbon source of abundance is the key of denitrifying bacteria efficient denitrification.For low-carbon high-nitrogen sewage, the carbon source that sewage itself can provide is not enough to meet denitrifying requirement, therefore the general not high (JanVymazal of artificial swamp nitrogen removal rate, Removalofnutrientsinvarioustypesofconstructedwetlands, ScienceoftheTotalEnvironment, 2007, pp.48-65.).
Microorganism electrolysis cell (MicrobialElectrolysisCell, MEC) be utilize microorganism as reactive agent, a kind of device (LiuH. that electromotive force produces hydrogen is applied between cathode and anode, GrotS., LoganB.E., Electrochemicallyassistedmicrobialproductionofhydrogenfr omacetate, EnvironmentalScience & Technology, 2005, pp.4317-4320.), be one of the study hotspot of recent domestic sewage treatment area.Because the redox potential of negative electrode in MEC producing hydrogen is low compared with the reaction of anode oxidation operation, therefore electronics can not neous flow.In order to overcome this energy barrier, product H-H reaction being carried out, needing an extra applying theoretical value to be the voltage of 0.13-0.14V.In real reaction, due to loss of potential, generally need the voltage of an additional 0.2-0.9V, but still be less than voltage (1.8-2.0V) required in electrolysis aquatic products hydrogen process.That is, although microorganism electrolysis cell needs impressed voltage, but still be less than the energy consumption needed for chemical electrolysis pond.
Research display, be effective removal (ParkJY that the bioelectrochemistry denitrification of electron donor can realize to nitrate from waste water nitrogen with hydrogen under low ratio of carbon to ammonium, YooYJ.Biologicalnitrateremovalinindustrialwastewatertrea tment:whichelectrondonorwecanchoose, AppliedMicrobiologyandBiotechnology, 2009, pp:415-429.).Its principle is, the electrochemical activity bacterium (having the general designation of born of the same parents' exoelectron transmission capacity microorganism without the need to exogenous electron amboceptor) of MEC cathode surface, receives the electronics provided from direct supply, and to be combined with proton at negative electrode and to produce hydrogen, hydrogen is as NO
3 -electron donor, by NO
3 -be reduced into N
2.Anode organism is for acetate, and concrete reaction equation is as shown in (1)-(3):
Anodic reaction: CH
3cOO
-+ 2H
2o → 2CO
2+ 7H
++ 8e
-(1)
Cathodic reaction: 2H
++ 2e
-→ H
2(2)
2NO
3 -+5H
2→N
2+4H
2O+2OH
-(3)
But the constructions cost needed for independent microorganism electrolysis cell is large, and running cost is very high, is difficult to apply on a large scale in China.
Current MEC is applied to artificial swamp and takes off nitrogen studies and there is no report both at home and abroad.
Summary of the invention
The purpose of this utility model is the device that there are provided a kind of composite vertical current artificial wetland coupling microorganism electrolysis cell strengthened denitrification, structure is simple, easy to use, under can significantly improving carbon source shortage condition, composite vertical current artificial wetland is to the denitrification effect of low-carbon high-nitrogen sewage.
In order to realize above-mentioned object, the utility model adopts following technical measures:
For the problems referred to above, combine microorganism electrolysis cell (MEC) with composite vertical current artificial wetland process low carbon-nitrogen ratio sewage, in sewage water denitrification process, except the denitrification process of wet land system itself, electrochemical autotrophic denitrification denitrification process can also be realized, improve total nitrogen removal effect, the carbon source deficiency occurred in artificial wetland treatment low carbon-nitrogen ratio sewage process can be solved to a certain extent and cause the problem that total nitrogen removal effect is low.Meanwhile, MEC directly combines with existing composite vertical current artificial wetland, has greatly saved structure and the running cost of MEC.
Technical scheme is: based on composite vertical current artificial wetland structure, by at downstream pond landfill anode conducting packing layer, up stream pond landfill negative electrode conductive filler layer, and the introducing of direct supply, the structural approach that formation microorganism electrolysis cell and artificial swamp are coupled, the method provides electronics to negative electrode by direct supply artificially, cathode zone is made to occur to produce H-H reaction, the hydrogen generated is as the electron donor of nitrate nitrogen, add hydrogen autotrophic type denitrification denitrogenation process, enhance the denitrification denitrogenation effect in the not enough situation of carbon source, thus improve the removal of composite vertical current artificial wetland to low-carbon high-nitrogen sewage.
A kind of device of composite vertical current artificial wetland coupling microorganism electrolysis cell strengthened denitrification, this device comprises: be equipped with sewage water inlet pipe successively along water (flow) direction, sewage cloth water distributing pipe, top non-conducting filler layer A, anode conducting packing layer, bottom is communicated with packing layer, negative electrode conductive filler layer, top non-conducting filler layer B, water outlet header, it is characterized in that: downstream pond inner anode conductive filler layer is communicated with packing layer with bottom respectively, top non-conducting filler layer A is connected, up stream pond inner cathode conductive filler layer is communicated with packing layer with bottom respectively, top non-conducting filler layer B is connected, wetland plant is planted in top non-conducting filler layer A and top conductive filler layer B, anode collector, cathode current collector by wire respectively with the positive pole of direct supply, negative pole connects to form loop line, anode collector and cathode current collector are placed in anode conducting packing layer and negative electrode conductive filler layer respectively.
It is one in sandstone, hard coal, biological ceramic particle or one to three kind that described bottom is communicated with filler in packing layer, top non-conducting filler layer A and top non-conducting filler layer B; The plant of plantation is arbitrary combination in one in Spiked Loosestrife, wild rice stem, Canna generalis Bailey, the sweet thatch of water, Value of Spartina Anglica, Arundinella hirta (Thunb.) Tanaka, calamus, reed, napier grass, floral leaf Lu Di, iris or to ten one kind in top non-conducting filler layer A and top non-conducting filler layer B.
In described anode conducting packing layer and negative electrode conductive filler layer, filler is granulated active carbon or graphite granule; Granulated active carbon particle diameter is 1-5mm, and tamped density is 0.45-0.55g/cm
3; Graphite granule particle diameter is 1-5mm, and tamped density is 1.8-2g/cm
3.
Described anode collector and cathode current collection be graphite felt, graphite rod or stainless steel very.
Described downstream pond differs 8-12cm with the filler degree of depth in up stream pond; Downstream pond depth of packing scope is 53-82cm; Up stream pond depth of packing scope is 43-72cm.
Described top non-conducting filler layer A thickness is 10-35cm, and top non-conducting filler layer B thickness is 10-25cm.
Described anode conducting packing layer and negative electrode conductive filler layer thickness are 5-25cm.
It is 8-22cm that described bottom is communicated with packing layer thickness.
Described direct supply is the device forming steady current in holding circuit, exportable voltage 0-1.5V, outward current 0-200mA.
Described device water inlet is low carbon-nitrogen ratio sewage, comprises low C/N than sanitary sewage, contaminated earth's surface and underground water, aquaculture wastewater, some industrial sewage (as coked waste water, glassine paper production waste, chemical fertilizer sewage etc.), Sewage Plant secondary effluent, agricultural runoff, percolate.
The utility model compared with prior art, has following advantage and effect:
(1) the utility model is on the basis not changing original composite vertical current artificial wetland structure, by simple electrode landfill (laying negative electrode conductive filler layer and anode conducting packing layer) and applying external voltage, make nitrate nitrogen can under the condition of low-carbon (LC) not even carbonaceous sources, using the hydrogen of negative electrode conductive filler layer generation as electron donor generation hydrogen autotrophic denitrification denitrification process, enhance the removal efficiency of nitrate nitrogen to a certain extent, thus improve the total nitrogen removal effect of low carbon-nitrogen ratio sewage.
(2) in the utility model, negative electrode conductive filler layer, anode conducting packing layer are compared with traditional chemical electrolysis pond, and the advantage that concrete constructions cost is low, energy consumption is little, avoids the problem that chemical electrode needs often to change simultaneously.
(3) the more conventional composite vertical current artificial wetland of the utility model can improve 15%-30% to the nitrogen removal rate of low-carbon high-nitrogen sewage.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of composite vertical current artificial wetland coupling microorganism electrolysis cell.
Wherein, 1-downstream pond; 2-up stream pond; 3-sewage water inlet pipe; 4-sewage cloth water distributing pipe; 5-wetland plant; 6-top non-conducting filler layer A; 7-anode conducting packing layer; 8-anode collector (common, market is purchased); Packing layer is communicated with bottom 9-; 10-wire; 11-wetland inner partition wall; 12-cathode current collector (common, market is purchased); 13-negative electrode conductive filler layer; 14-top non-conducting filler layer B; 15-water outlet header; 16-direct supply.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
A kind of device of composite vertical current artificial wetland coupling microorganism electrolysis cell strengthened denitrification, this device is equipped with sewage water inlet pipe 3 successively along water (flow) direction, sewage cloth water distributing pipe 4, top non-conducting filler layer A6, anode conducting packing layer 7, bottom is communicated with packing layer 9, negative electrode conductive filler layer 13, top non-conducting filler layer B14, water outlet header 15, it is characterized in that: downstream pond 1 inner anode conductive filler layer 7 is communicated with packing layer 9 with bottom respectively, top non-conducting filler layer A6 is connected, up stream pond 2 inner cathode conductive filler layer 13 is communicated with packing layer 9 with bottom respectively, top non-conducting filler layer B14 is connected, wetland plant 5 is planted in top non-conducting filler layer A6 and top conductive filler layer B14, anode collector 8, cathode current collector 12 by wire 10 respectively with the positive pole of direct supply 16, negative pole connects to form loop line, anode collector (8) and cathode current collector 12 are placed in anode conducting packing layer 7 and negative electrode conductive filler layer 13 respectively.
The device of described a kind of composite vertical current artificial wetland coupling microorganism electrolysis cell strengthened denitrification, is characterized in that: it is one in sandstone, hard coal, biological ceramic particle or one to three kind that described bottom is communicated with filler in packing layer 9, top non-conducting filler layer A6 and top non-conducting filler layer B14; The plant 5 of plantation is arbitrary combination in one in Spiked Loosestrife, wild rice stem, Canna generalis Bailey, the sweet thatch of water, Value of Spartina Anglica, Arundinella hirta (Thunb.) Tanaka, calamus, reed, napier grass, floral leaf Lu Di, iris or to ten one kind in top non-conducting filler layer A6 and top non-conducting filler layer B14.
The device of described a kind of composite vertical current artificial wetland coupling microorganism electrolysis cell strengthened denitrification, is characterized in that: in described anode conducting packing layer 7 and negative electrode conductive filler layer 13, filler is granulated active carbon or graphite granule; Granulated active carbon particle diameter is 1-5mm, and tamped density is 0.45-0.55g/cm
3; Graphite granule particle diameter is 1-5mm, and tamped density is 1.8-2g/cm
3.
The device of described a kind of composite vertical current artificial wetland coupling microorganism electrolysis cell strengthened denitrification, is characterized in that: described anode collector 8 and cathode current collector 12 are graphite felt, graphite rod or stainless steel.
The device of described a kind of composite vertical current artificial wetland coupling microorganism electrolysis cell strengthened denitrification, is characterized in that: described downstream pond 1 differs 8-12cm with the filler degree of depth in up stream pond 2; Downstream pond 1 depth of packing scope is 53-82cm; Up stream pond 2 depth of packing scope is 43-72cm.
The device of described a kind of composite vertical current artificial wetland coupling microorganism electrolysis cell strengthened denitrification, is characterized in that: described top non-conducting filler layer A6 thickness is 10-35cm, and top non-conducting filler layer B14 thickness is 10-25cm.
The device of described a kind of composite vertical current artificial wetland coupling microorganism electrolysis cell strengthened denitrification, is characterized in that: described anode conducting packing layer 7 and negative electrode conductive filler layer 13 thickness are 5-25cm.
The device of described a kind of composite vertical current artificial wetland coupling microorganism electrolysis cell strengthened denitrification, is characterized in that: it is 8-22cm that described bottom is communicated with packing layer 9 thickness.
Described direct supply 16 is the device forming steady current in holding circuit, exportable voltage 0-1.5V, outward current 0-200mA.
Described device water inlet is low carbon-nitrogen ratio sewage, comprises low C/N than sanitary sewage, contaminated earth's surface and underground water, aquaculture wastewater, some industrial sewage (as coked waste water, glassine paper production waste, chemical fertilizer sewage etc.), Sewage Plant secondary effluent, agricultural runoff, percolate.
Adopt the structure in the utility model, overall detergent power, higher than conventional composite vertical current artificial wetland, especially on the removal ability of nitrate nitrogen and total nitrogen, can improve 15%-30%.
Claims (8)
1. the device of a composite vertical current artificial wetland coupling microorganism electrolysis cell strengthened denitrification, this device is equipped with sewage water inlet pipe (3) successively along water (flow) direction, sewage cloth water distributing pipe (4), top non-conducting filler layer A(6), anode conducting packing layer (7), bottom is communicated with packing layer (9), negative electrode conductive filler layer (13), top non-conducting filler layer B(14), water outlet header (15), it is characterized in that: downstream pond (1) inner anode conductive filler layer (7) is communicated with packing layer (9) respectively with bottom, top non-conducting filler layer A(6) be connected, up stream pond (2) inner cathode conductive filler layer (13) is communicated with packing layer (9) respectively with bottom, top non-conducting filler layer B(14) be connected, top non-conducting filler layer A(6) and top conductive filler layer B(14) middle plantation wetland plant (5), anode collector (8), cathode current collector (12) by wire (10) respectively with the positive pole of direct supply (16), negative pole connects to form loop line, anode collector (8) and cathode current collector (12) are placed in anode conducting packing layer (7) and negative electrode conductive filler layer (13) respectively.
2. the device of a kind of composite vertical current artificial wetland coupling microorganism electrolysis cell strengthened denitrification according to claim 1, is characterized in that: described bottom is communicated with packing layer (9), top non-conducting filler layer A(6) and top non-conducting filler layer B(14) interior filler is one in sandstone, hard coal, biological ceramic particle or one to three kind; Top non-conducting filler layer A(6) and top non-conducting filler layer B(14) in the plant (5) of plantation be Spiked Loosestrife, wild rice stem, Canna generalis Bailey, the sweet thatch of water, Value of Spartina Anglica, Arundinella hirta (Thunb.) Tanaka, calamus, reed, napier grass, floral leaf Lu Di, arbitrary combination in one in iris or to ten one kind.
3. the device of a kind of composite vertical current artificial wetland coupling microorganism electrolysis cell strengthened denitrification according to claim 1,
It is characterized in that: described anode conducting packing layer (7) and negative electrode conductive filler layer (13) interior filler are granulated active carbon or graphite granule; Granulated active carbon particle diameter is 1-5mm, and tamped density is 0.45-0.55g/cm
3; Graphite granule particle diameter is 1-5mm, and tamped density is 1.8-2g/cm
3.
4. the device of a kind of composite vertical current artificial wetland coupling microorganism electrolysis cell strengthened denitrification according to claim 1, is characterized in that: described anode collector (8) and cathode current collector (12) are graphite felt, graphite rod or stainless steel.
5. the device of a kind of composite vertical current artificial wetland coupling microorganism electrolysis cell strengthened denitrification according to claim 1, is characterized in that: described downstream pond (1) differs 8-12cm with the filler degree of depth of up stream pond (2); Downstream pond (1) depth of packing scope is 53-82cm; Up stream pond (2) depth of packing scope is 43-72cm.
6. the device of a kind of composite vertical current artificial wetland coupling microorganism electrolysis cell strengthened denitrification according to claim 1, it is characterized in that: described top non-conducting filler layer A(6) thickness is 10-35cm, top non-conducting filler layer B(14) thickness is 10-25cm.
7. the device of a kind of composite vertical current artificial wetland coupling microorganism electrolysis cell strengthened denitrification according to claim 1, is characterized in that: described anode conducting packing layer (7) and negative electrode conductive filler layer (13) thickness are 5-25cm.
8. the device of a kind of composite vertical current artificial wetland coupling microorganism electrolysis cell strengthened denitrification according to claim 1, is characterized in that: it is 8-22cm that described bottom is communicated with packing layer (9) thickness.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107010734A (en) * | 2017-06-07 | 2017-08-04 | 环境保护部南京环境科学研究所 | A kind of removal lead, the feulcell prototype artificial swamp of zinc heavy metal |
| CN110980956A (en) * | 2019-12-11 | 2020-04-10 | 四川农业大学 | Microbial fuel cell coupled constructed wetland U-shaped device and operation method |
-
2015
- 2015-11-04 CN CN201520871731.3U patent/CN205088013U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107010734A (en) * | 2017-06-07 | 2017-08-04 | 环境保护部南京环境科学研究所 | A kind of removal lead, the feulcell prototype artificial swamp of zinc heavy metal |
| CN110980956A (en) * | 2019-12-11 | 2020-04-10 | 四川农业大学 | Microbial fuel cell coupled constructed wetland U-shaped device and operation method |
| CN110980956B (en) * | 2019-12-11 | 2021-11-09 | 四川农业大学 | Microbial fuel cell coupled constructed wetland U-shaped device and operation method |
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