CN105502673B - It is a kind of using slag as the synchronous electrogenesis of anode and the device of sewage purification - Google Patents

It is a kind of using slag as the synchronous electrogenesis of anode and the device of sewage purification Download PDF

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CN105502673B
CN105502673B CN201610063284.8A CN201610063284A CN105502673B CN 105502673 B CN105502673 B CN 105502673B CN 201610063284 A CN201610063284 A CN 201610063284A CN 105502673 B CN105502673 B CN 105502673B
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slag
layer
anode
pond
conducting filler
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CN105502673A (en
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吴振斌
肖恩荣
周银
许丹
武俊梅
徐栋
贺锋
周巧红
张义
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Institute of Hydrobiology of CAS
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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
    • C02F3/30—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
    • C02F2101/105—Phosphorus compounds
    • 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
    • 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
    • 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
    • Y02W10/30—Wastewater or sewage treatment systems using renewable energies
    • Y02W10/33—Wastewater or sewage treatment systems using renewable energies using wind energy
    • 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
    • Y02W10/30—Wastewater or sewage treatment systems using renewable energies
    • Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Microbiology (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Biochemistry (AREA)
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  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Biotechnology (AREA)
  • Botany (AREA)
  • Biological Treatment Of Waste Water (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

The invention discloses a kind of synchronous electrogenesis and effluent treatment plant using slag as anode, by being used as galvanic anode filler using slag, simultaneously as in filler insertion composite vertical current artificial wetland system, the new structure method that microbiological fuel cell and artificial swamp are coupled is formd.System laying is included setting gradually from top to bottom in downstream pond for top non-conducting filler layer, slag anode layer, embedded current collector in slag anode layer；Upstream pond sets gradually as bottom non-conducting filler layer, cathode layer from bottom to up；Downstream pond connects pond by bottom with upstream pond and connected, and current collector and cathode layer are connected composition closed-loop path by wire with resistance box respectively.Slag electrode landfill to anode of microbial fuel cell is coupled with composite vertical current artificial wetland simultaneously, synchronous electrogenesis and the double utility of sewage purification are realized, improves anode current efficiency of transmission, reduces the internal resistance of cell, electricity generation performance is improved, while solves the problems, such as that acidifying occurs in water quality.

Description

It is a kind of using slag as the synchronous electrogenesis of anode and the device of sewage purification
Technical field
The invention belongs to sewage treatment area, and in particular to a kind of synchronous electrogenesis and sewage purification using slag as anode Device, realization electricity production and sewage purification are coupled with microbiological fuel cell by composite vertical current artificial wetland.
Background technology
Energy crisis and environmental pollution and resulting society, climatic issues etc. have become Jiao of whole world concern Point.It is that principle develops clean energy resource and recycling economy with " minimizing, recycling and recycling ", is Resources for construction economizing type, ring Border friendly society and the important channel for realizing sustainable development.Exploitation, utilize using solar energy, nuclear energy, wind energy, biomass energy as Main clean energy resource is to substitute traditional energy, solves the inevitable choice of energy crisis, and the strategy of China's future source of energy development It is required that.
Composite vertical current artificial wetland processing system (Integrated Vertical Flow Constructed Wetland, IVCW) it is to be tieed up in the enforcement period of the ninth five-year plan by aquatile research institute of the Chinese Academy of Sciences and Cologne, Germany university, Austria Receive the shareds such as agriculture university European Union international cooperative project in propose first.The unique descent activation of the technique Water flow mode efficiently solves " short circuit " phenomenon that other types wetland easily occurs, and forms downstream pond subregion Aerobic, downstream pond part anaerobism compound water purification structure, promote nitrification and denitrification effect, hence it is evident that improve the de- of system Nitrogen effect（Wu Zhenbin, composite vertical current artificial wetland, Science Press, Beijing, 2008）.
Microbiological fuel cell（Microbial fuel cell, MFC）It is to utilize microbe-catalytic oxidization organic matter and nothing Machine thing and the device for producing electric energy, it can be used for wastewater treatment, and it is low to consume energy, in recent years as the research heat of environmental area Point.
Composite vertical current artificial wetland can be realized with microbiological fuel cell by wetland plant, microorganism, matrix, electrode The combination of integration, form composite vertical current artificial wetland-microbiological fuel cell（IVCW-MFC）Coupled system, utilization is wet Ground photosynthesis of plant conversion solar can be electric energy, can reclaim electric energy while sewage is purified, will persistently may be used as distributing A kind of new model of renewable source of energy generation, there is good development prospect.
At present, the research on IVCW-MFC coupled systems is at the early-stage, wherein the research of electrode for reduce operation into Originally, improving power density and purification of water quality efficiency has great significance.Good electrode configuration needs to provide to the greatest extent for microorganism Big bond area is measured, while realizes that effective electronics is collected.The electrode material master in IVCW-MFC systems is used now There are graphite felt, graphite cake, granular activated carbon（GAC）, stainless (steel) wire and carbon cloth.Wherein GAC is considered as optimum as plant The anode material of electricity production system, its particle diameter is small, rough surface, and electricity production and sewage purification performance are more excellent（Arends J B A, londeel V, Tennison S R, Boon N, and Verstraete W, Suitability of granular carbon as an anode material for sediment microbial fuel cells, in J. Soils Sediment, 2012, pp.1197-1206.）, still, the price of this material is of a relatively high, and practicality is not high.
Slag, a kind of industrial solid wastes, discharge rate are about the 15 ~ 20% of crude steel yield.Slag mainly by calcium, iron, silicon, The oxide composition of magnesium and a small amount of aluminium, manganese, phosphorus etc..Main mineral facies are tricalcium silicate, dicalcium silicate, monticellite, calcium The solid solution that manganolite, calcium aluminoferrite and silicon, magnesium, iron, manganese, the oxide of phosphorus are formed, also containing a small amount of free oxidation Calcium and metallic iron, fluor-apatite etc., possesses larger phosphorus adsorption capacity in theory.Slag is used as IVCW-MFC systems at present The research of anode material there is no report both at home and abroad.
The content of the invention
It is an object of the invention to provide a kind of using slag as the synchronous electrogenesis of anode and the device of sewage purification, by slag Electrode landfill is coupled with composite vertical current artificial wetland simultaneously to anode of microbial fuel cell, realizes synchronous electrogenesis and sewage The double utility of purification, anode current efficiency of transmission is improved, reduce the internal resistance of cell, improve electricity generation performance.
To achieve the above object, the present invention uses following technical measures：
Technical scheme：The core of the present invention is based on composite vertical current artificial wetland structure, by filling slag sun Pole layer, biological-cathode layer, form the new structure method that microbiological fuel cell and artificial swamp are coupled, and this method passes through Using slag as galvanic anode, anode current efficiency of transmission is improved, the internal resistance of cell is reduced, so as to improve IVCW-MFC systems Electricity generation performance；On the other hand, by absorption of the slag to phosphor in sewage, and matrix with root system of plant to the net of other pollutants Change acts on, and can strengthen the sewage purification ability of IVCW-MFC systems.
It is a kind of using slag as the synchronous electrogenesis of anode and the device of sewage purification, by composite vertical current artificial wetland with it is micro- Electricity production and sewage purification are realized in biological fuel cell coupling, including downstream pond and upstream pond, described downstream pond and upper Row stream pond is connected by bottom circulation layer, and described downstream pond top sets water inlet pipe and water distributor, described upstream pond Top sets collector pipe and outlet pipe；Set gradually from top to bottom in described downstream pond as top non-conducting filler layer and steel Slag anode layer, current collector is buried in described slag anode layer；Described upstream pond is set gradually the bottom of as from bottom to up Portion's non-conducting filler layer and cathode layer, current collector and cathode layer are connected composition with resistance box by wire and closed back respectively Road, top non-conducting filler layer in cathode layer with planting wetland plant, described downstream pond middle and upper part non-conducting filler thickness It is 5-25cm to spend for 10-30cm, slag anode layer thickness；Bottom circulation thickness degree is 3-20cm；Bottom is non-in upstream pond leads Electric packing layer thickness is 5-30cm；Cathode electrode layer thickness is 3-15cm, and wherein downstream pond mesostroma is higher than upstream pond mesostroma； Current collector is stainless steel grid or graphite carbon rod in described slag anode layer.
Filler in described top non-conducting filler layer, filler in filler and bottom non-conducting filler layer in bottom circulation layer For a kind or 2 to 5 kinds of any combination in gravel, zeolite, anthracite, biological ceramic particle and quartz sand, particle diameter 0.5-10mm.
Described top non-conducting filler layer and the wetland plant of plantation in cathode layer are Lythrum salicaria, cyperus alternifolius, wild rice stem, U.S. 1 kind or 2 to 12 kinds in people any of several broadleaf plants, water sweet thatch, Value of Spartina Anglica, Arundinella hirta (Thunb.) Tanaka, calamus, reed, napier grass, floral leaf Lu Di and iris any Combination.
Filler is discarded slag in described slag anode layer, is any in vessel slag, open hearth slag, electroslag；Steel Slag particle footpath is 1-8mm, packed density 0.35-0.65g/cm3。
Conductive material is any in graphite particle, activated carbon granule, graphite felt and stainless steel in described cathode layer Kind；When wherein using graphite particle or activated carbon granule as negative electrode filler, particle diameter 1-5mm, while to insert electric current collection Device --- stainless (steel) wire or graphite carbon rod.
It is by the synchronous electrogenesis of anode and the process of sewage purification water of slag：
A, sewage（Including micro-polluted surface water, Polluted Groundwater and sanitary sewage）Enter first from the downstream pond of the left side Water pipe enters, and reaches water distributor and realizes water distribution uniformity, and, this layer of kind is implanted with wetland plant along top non-conducting filler layer vertically downward Thing, root system of plant are dispersed in hypothallus.Because absorption and sorption of root system of plant etc. acts on during this, the absorption of matrix, cut Give over to use, and in matrix microorganism metabolism, partial organic substances and suspension are removed efficiently in sewage, TN with TP is also partly removed；
B, slag anode layer is flowed through by step A sewage, the organic matter of organic matter and plant root exudation in sewage The electricity production bacterium being attached on slag utilizes, and discharges electronics, and metal oxide helps electronics quickly to have as mediator in slag It is delivered to anode surface to effect to be collected by current collector, is delivered on external circuit, is reached finally by outer meeting resistance case Cathode layer forms closed-loop path, produces electric energy.In this process, dirty Organic substance in water is largely consumed, and phosphorus is due to slag Physical absorption, chemisorbed and precipitation content substantially reduce, nitrogen due in downstream pond subregion it is aerobic, can promote The generation of nitrification, while ammonia nitrogen also can partly be gone due to cation exchange effect occurs with metal cation in slag Remove；
C, there is 0.5% gradient due to whole system bottom by step B sewage, sewage can flow automatically to flow by bottom Logical layer reaches the upstream pond on the right, and because left side downstream pond can be flooded than upstream pond matrix floor height, current automatically Row stream pond matrix enters non-conducting filler layer, and during this, the route that sewage flows through in matrix lengthens significantly, matrix and base The time that microbe acts in matter also accordingly lengthens, and substantially increases the ratio that pollutant is removed.And upstream The state of part anaerobism in pond, promote the progress of anti-nitration reaction, hence it is evident that improve the ability of the denitrogenation of system；
D, upstream pond middle and upper part cathode layer is finally flowed into by step C sewage, due to cloudy using air biology Pole, this layer of kind have wetland plant, and because the Radial Oxygen Loss from Root of plant acts on, and negative electrode top layer is directly and air contact, can in a steady stream It is continuous to provide oxygen to negative electrode, improve the efficiency that negative electrode receives electronics.Acted on simultaneously in absorption and sorption of root system of plant etc. Under, and under the collective effect of negative electrode and the microorganism being attached to around negative electrode, remaining organic matter and nitrogen, phosphorus are further in sewage Be removed, after purification sewage after collector pipe is collected by outlet pipe bleeder.
The present invention compared with prior art, has the following advantages that and effect：
（1）Discarded slag recycles.Discarded slag is set to obtain effectively as galvanic anode filler using slag in the present invention Utilize.
（2）Reduce cost.IVCW-MFC coupled systems are on the basis of synchronous electrogenesis and sewage disposal is realized in the present invention, The granular activated carbon commonly used with traditional IVCW-MFC systems（GAC）Compared Deng electrode, greatly reduce the cost of battery.With people The customary filler sandstone of work wetland, anthracite etc. are compared, and have been greatly reduced the operating cost of system.
（3）Strengthen electricity production flora efficiency of transmission, improve electricity production efficiency.The electro-chemical activity microorganism of MFC anodes mainly by Alienation metal reducing miroorganisms are formed.The extracellular cromoci of metal oxide and alienation metal reducing miroorganisms has high affinity, energy Enough it is reduced as electron acceptor, with metal ion or its oxide（Mn2+、Ni2+、Fe3O4、Ni2+Deng）Electrode is repaiied Decorations, the operating efficiency of electrode can be significantly improved, slag has stronger electric conductivity in itself, and particle diameter is smaller, rough surface, and steel Rich in the metal oxides such as iron, manganese, Fe in slag3O4Mediator can be used as Deng metal oxide, improves electronics from electricity production bacterium to sun The efficiency of transmission on pole surface, the ohmic internal resistance and polarization resistance of anode are reduced, so as to improve the electricity production efficiency of IVCW-MFC systems.
（4）It is preferable to the absorption property of phosphorus.Filling substrate of the slag as artificial swamp, it is preferable to the removal effect of phosphorus, Average removal rate can be up to 91.9%, and slag is in addition to itself has physical absorption to phosphorus element, in itself mineral composition composition The metal ions such as calcium ion, aluminium ion can chemically react with phosphate from sewage, and precipitation further occurs.
（5）There is the problem of water outlet is in easily strong basicity in slag, and MFC is run as a kind of potential wet land filler in itself During, as electronics through external circuit is transferred to negative electrode, in order to maintain the ion concentration of anode and negative electrode, only H+Move to the moon Pole, or OH-Move round about, and remove H+Cation or OH in addition-The migration of anion in addition can cause to accumulate Causing concentration gradient increase so that anode chamber pH declines, and acidifying problem occurs, slag is used as into IVCW-MFC system anode fillers, The cation being rich in slag can reduce anode and cathode concentration gradient just, can solve the above problems just.
（6）Using composite vertical current artificial wetland（IVCW）Technique couples with MFC, on the one hand extends sewage in matrix The path flowed through, improve clean-up effect of the matrix to sewage；Another aspect downstream pond subregion is aerobic, upstream pond portion Divide the compound water purification structure of anaerobism, promote nitrification and denitrification effect, hence it is evident that improve the denitrification effect of system.
Brief description of the drawings
Fig. 1 is the structural representation that a kind of vertical current constructed wetland couples microbiological fuel cell.
Wherein, 1- downstreams pond；2- water inlet pipes；3- water distributors；4- tops non-conducting filler layer；5- slag anode layers；6- Current collector；7- bottoms connectivity layer；8- upstreams pond；9- bottoms non-conducting filler layer；10- cathode layers；11- collector pipes；12- Outlet pipe；13- wetland plants；14- wires；15- resistance boxes.
Embodiment
The specific embodiment of invention is explained and illustrated below in conjunction with accompanying drawing 1, is not construed as limiting the invention.
Embodiment 1：
As shown in figure 1, it is a kind of using slag as the synchronous electrogenesis of anode and the device of sewage purification, pass through complex vertical person who lives in exile Work wetland couples realization electricity production and sewage purification with microbiological fuel cell, and the pvc pipe of cylinder is made into U-typed（H=50cm, D=15cm）, the U-typed pipe left side is as downstream pond 1, the right as upstream pond 8, intermediate connection part as bottom circulation layer 7, bottom circulation layer 7 tilts down 0.5% from left to right, sets water inlet pipe 2, water distributor 3, top non-in the downstream pond 1 on the left side Conductive filler layer 4 and slag anode layer 5；Bottom non-conducting filler layer 9, cathode layer 10 are set in the upstream pond 8 on the right, catchmented Pipe 11 and outlet pipe 12, set gradually from top to bottom as top non-conducting filler layer 4 and slag anode layer 5, steel in downstream pond 1 Current collector 6 is buried in slag anode layer 5；Upstream pond 8 sets gradually as bottom non-conducting filler layer 9 and negative electrode from bottom to up Layer 10；Current collector 6 and cathode layer 10 are connected composition closed-loop path by wire 14 with resistance box 15 respectively.
Gravel, laying depth H=30cm, grain size of gravel 5- are filled in the middle and upper part non-conducting filler layer 4 of downstream pond 1 10mm；Filling is derived from the slag of Wuhan steel plant in slag anode layer 5, and laying depth H=10cm, slag particle diameter is 1-8mm, Packed density is 0.45g/cm3, stainless (steel) wire is inserted in slag as current collector 3；Quartz is filled in bottom circulation layer 7 Sand, laying depth are H=15cm, quartz sand particle size 0.5-1mm；In upstream pond 8 gravel is filled in bottom non-conducting filler layer 9 Stone, laying depth H=30cm, grain size of gravel 5-10mm；Height H=the 3cm of cathode layer 10, is laid in by electrode material of graphite felt On gravel, make do not had graphite felt, graphite felt thickness D=6mm into water sewage；In the middle and upper part non-conducting filler layer 4 of downstream pond 1 with Wetland plant 13 is all canna in cathode layer 10 in upstream pond 8（Each 3 plants）；Resistance box 15 is arranged to 1000 Europe.
Wherein water inlet is the sanitary sewage of laboratory autogamy, and the sewage is characterized as：COD=500 ~ 600mg/L, TN=30 ~ 40mg/L, TP=10 ~ 15mg/L, pH=7.8.
Sewage is pumped into device by the system by peristaltic pump, and the flow set of pump is 1.5ml/min, and sewage is first from the left side Water inlet pipe enters in downstream pond, reaches water distributor and realizes water distribution uniformity, and, this mistake. along top non-conducting filler layer vertically downward Because absorption and sorption of canna root system etc. acts in journey, the generation of microorganism in the absorption of matrix, crown_interception, and matrix The effect of thanking, partial organic substances and suspension are removed efficiently in sewage, and TN and TP is also partly removed；Subsequent sewage flows into Slag anode layer, the electricity production bacterium that the organic matter of organic matter and the secretion of canna root system in sewage is attached on slag utilize, Electronics is discharged, metal oxide helps electronics to be fast and effeciently delivered to anode surface and received by electric current as mediator in slag Storage collects, and is delivered on external circuit, and reaching cathode layer finally by outer meeting resistance case forms closed-loop path, produces electricity Energy.In this process, dirty Organic substance in water is largely consumed, and phosphorus is due to the physical absorption of slag, chemisorbed and precipitation Effect content substantially reduces, nitrogen due in downstream pond subregion it is aerobic, can promote the generation of nitrification, at the same ammonia nitrogen by In cation exchange effect occurs with metal cation in slag, can also be partially removed；Then, sewage flows through bottom connectivity layer The bottom conductive packing layer in the upstream pond of the right is reached, during this, the route that sewage flows through in matrix lengthens significantly, Matrix is also corresponding to the time of microbe effect in matrix to be lengthened, and substantially increases the ratio that pollutant is removed. And in upstream pond part anaerobism state, promote the progress of anti-nitration reaction, hence it is evident that improve the ability of the denitrogenation of system. Final sewage flows through graphite felt cathode layer, and the Radial Oxygen Loss from Root effect and graphite felt surface due to canna directly connect with air Touch, continually can must provide oxygen to negative electrode, improve the efficiency that negative electrode receives electronics.Absorption in root system of plant simultaneously, inhale It is attached to wait under effect, and under the collective effect of negative electrode and the microorganism being attached to around negative electrode, remaining organic matter and nitrogen in sewage, Phosphorus is further removed, and for sewage by outlet pipe bleeder after collector pipe is collected, hydraulic detention time is 7 days after purification.
Test result indicates that：When using the IVCW-MFC coupled systems using slag as anode to handle the type sewage, electricity production Power reaches 23.20mW/m2, electricity production it is more conventional using activated carbon granule be anode when improve 156.0%.COD is gone in sewage Except rate be up to 94.8%, TN clearances for 93.3%, TP clearances up to 92.3%, be by matrix of slag apparently higher than with gravel etc. The constructed wetland device of matrix.Water outlet pH is 8.0 simultaneously, alleviates the problem of water outlet is in easily strong basicity to a certain extent.
Embodiment 2：
As shown in figure 1, it is a kind of using slag as the synchronous electrogenesis of anode and the device of sewage purification, pass through complex vertical person who lives in exile Work wetland couples realization electricity production and sewage purification with microbiological fuel cell, and the pvc pipe of cylinder is made into U-typed（H=50cm, D=15cm）, U " the type pipe left sides are as downstream pond 1, the right as upstream pond 8, intermediate connection part as bottom circulation layer 7, water inlet pipe 2, water distributor 3, top non-conducting filler layer 4, slag anode layer 5 are set in the downstream pond 1 on the left side；The right it is upper Row stream sets bottom non-conducting filler layer 9, cathode layer 10, collector pipe 11, outlet pipe 12 in pond 8, it is characterised in that downstream pond Set gradually from top to bottom in 1 as top non-conducting filler layer 4, slag anode layer 5, electric current collection is buried in slag anode layer 5 Device 6；Upstream pond 8 sets gradually as bottom non-conducting filler layer 9, cathode layer 10 from bottom to up；Downstream pond 1 and lower upstream Pond 8 connects pond 7 by bottom and connected, and current collector 6 and cathode layer 10 are connected composition by wire 14 with resistance box 15 respectively Closed-loop path.
Anthracite, laying depth H=10cm, particle diameter 5-10mm are filled in the middle and upper part non-conducting filler layer 4 of downstream pond 1； Filling is derived from the slag of Wuhan steel plant in slag anode layer 5, and laying depth H=5cm, slag particle diameter is 1-8mm, and filling is close Spend for 0.35g/cm3, stainless (steel) wire is inserted in slag as current collector 3；Quartz sand is filled in bottom circulation layer 7, is laid Thickness is H=3cm, quartz sand particle size 0.5-1mm；Gravel is filled in upstream pond 8 in bottom non-conducting filler layer 9, laying is thick Spend H=10cm, grain size of gravel 5-10mm；Height H=the 3cm of cathode layer 10, is laid on gravel by electrode material of graphite felt, makes Water inlet sewage did not had graphite felt, graphite felt thickness D=6mm；In the middle and upper part non-conducting filler layer 4 of downstream pond 1 with upstream pond 8 Wetland plant 13 is respectively canna, cyperus alternifolius in middle cathode layer 10（Each 3 plants）；Resistance box 15 is arranged to 1000 Europe.
Intake and be characterized as Wuhan eutrophication pond water, the type water pollutant：COD=50 ~ 60mg/L, TN=2 ~ 3mg/L, TP=0.5 ~ 4mg/L, pH=7.5.
Sewage is pumped into device by the system by peristaltic pump, and the flow set of pump is 1.5ml/min, and sewage is first from the left side Water inlet pipe enters in downstream pond, reaches water distributor and realizes water distribution uniformity, and, this mistake. along top non-conducting filler layer vertically downward Because absorption and sorption of canna root system etc. acts in journey, the generation of microorganism in the absorption of matrix, crown_interception, and matrix The effect of thanking, partial organic substances and suspension are removed efficiently in sewage, and TN and TP is also partly removed；Subsequent sewage flows into Slag anode layer, the electricity production bacterium that the organic matter of organic matter and the secretion of canna root system in sewage is attached on slag utilize, Electronics is discharged, metal oxide helps electronics to be fast and effeciently delivered to anode surface and received by electric current as mediator in slag Storage collects, and is delivered on external circuit, and reaching cathode layer finally by outer meeting resistance case forms closed-loop path, produces electricity Energy.In this process, dirty Organic substance in water is largely consumed, and phosphorus is due to the physical absorption of slag, chemisorbed and precipitation Effect content substantially reduces, nitrogen due in downstream pond subregion it is aerobic, can promote the generation of nitrification, at the same ammonia nitrogen by In cation exchange effect occurs with metal cation in slag, can also be partially removed；Then, sewage flows through bottom connectivity layer The bottom conductive packing layer in the upstream pond of the right is reached, during this, the route that sewage flows through in matrix lengthens significantly, Matrix is also corresponding to the time of microbe effect in matrix to be lengthened, and substantially increases the ratio that pollutant is removed. And in upstream pond part anaerobism state, promote the progress of anti-nitration reaction, hence it is evident that improve the ability of the denitrogenation of system. Final sewage flows through graphite felt cathode layer, and the Radial Oxygen Loss from Root effect and graphite felt surface due to cyperus alternifolius directly connect with air Touch, continually can must provide oxygen to negative electrode, improve the efficiency that negative electrode receives electronics.Absorption in root system of plant simultaneously, inhale It is attached to wait under effect, and under the collective effect of negative electrode and the microorganism being attached to around negative electrode, remaining organic matter and nitrogen in sewage, Phosphorus is further removed, and for sewage by outlet pipe bleeder after collector pipe is collected, hydraulic detention time is 7 days after purification.
Test result indicates that：When using the IVCW-MFC coupled systems using slag as anode to handle the type sewage, electricity production Power reaches 24.01mW/m2, electricity production it is more conventional using activated carbon granule be anode when improve 165.0%.COD is gone in sewage Except rate be up to 94.5%, TN clearances for 92.3%, TP clearances up to 92.4%, be by matrix of slag apparently higher than with gravel etc. The constructed wetland device of matrix.Water outlet pH is 8.1 simultaneously, alleviates the problem of water outlet is in easily strong basicity to a certain extent.
Embodiment 3：
As shown in figure 1, it is a kind of using slag as the synchronous electrogenesis of anode and the device of sewage purification, pass through complex vertical person who lives in exile Work wetland couples realization electricity production and sewage purification with microbiological fuel cell, and the pvc pipe of cylinder is made into U-typed（H=50cm, D=15cm）, U " the type pipe left sides are as downstream pond 1, the right as upstream pond 8, intermediate connection part as bottom circulation layer 7, water inlet pipe 2, water distributor 3, top non-conducting filler layer 4 and slag anode layer 5 are set in the downstream pond 1 on the left side, the right Bottom non-conducting filler layer 9, cathode layer 10, collector pipe 11 and outlet pipe 12 be set in upstream pond 8, from upper in downstream pond 1 Set gradually under as top non-conducting filler layer 4 and slag anode layer 5, current collector 6 is buried in slag anode layer 5；On Row stream pond 8 is set gradually from bottom to up to be divided for bottom non-conducting filler layer 9 and cathode layer 10, current collector 6 and cathode layer 10 Composition closed-loop path is connected with resistance box 15 not by wire 14.
Zeolite, laying depth H=20cm are filled in the middle and upper part non-conducting filler layer 4 of downstream pond 1, the particle diameter of zeolite is 6mm-10mm；Filling is derived from the slag of Wuhan steel plant in slag anode layer 5, and laying depth H=25cm, slag particle diameter is 1- 8mm, packed density 0.65g/cm3, stainless (steel) wire is inserted in slag as current collector 3；Filled stone in bottom circulation layer 7 Sand, laying depth are H=20cm, quartz sand particle size 0.5-1mm；Filled in upstream pond 8 in bottom non-conducting filler layer 9 Boil bioceramic and anthracite, laying depth H=30cm, bioceramic and anthracite are each accounted for than for 2:1, bioceramic particle diameter For 0.5mm, anthracite granule size 1mm, cathode layer 10 is using activated carbon granule as filler, laying depth D=10cm, particle diameter 1mm- 5mm, graphite carbon rod is inserted in activated carbon granule as current collector；In the middle and upper part non-conducting filler layer 4 of downstream pond 1 with it is upper Wetland plant 13 is all reed in cathode layer 10 in row stream pond 8（Each 3 plants）；Resistance box 8 is arranged to 1000 Europe.
Wherein water inlet is the sanitary sewage of laboratory autogamy, and the sewage is characterized as：COD=500 ~ 600mg/L, TN=30 ~ 40mg/L, TP=10 ~ 15mg/L, pH=7.8.
Sewage is pumped into device by the system by peristaltic pump, and the flow set of pump is 1.5ml/min, and sewage is first from the left side Water inlet pipe enters in downstream pond, reaches water distributor and realizes water distribution uniformity, and, this mistake. along top non-conducting filler layer vertically downward Because absorption and sorption of reed root system etc. acts in journey, the metabolism of microorganism in the absorption of matrix, crown_interception, and matrix Act on, partial organic substances and suspension are removed efficiently in sewage, and TN and TP is also partly removed；Subsequent sewage flows into steel Slag anode layer, the electricity production bacterium that the organic matter of organic matter and the secretion of canna root system in sewage is attached on slag utilize, released Electric discharge is sub, and metal oxide helps electronics to be fast and effeciently delivered to anode surface by electric current collection as mediator in slag Device collects, and is delivered on external circuit, and reaching cathode layer finally by outer meeting resistance case forms closed-loop path, produces electric energy. In this process, dirty Organic substance in water is largely consumed, and phosphorus is due to the physical absorption of slag, chemisorbed and precipitation Content substantially reduces, nitrogen due in downstream pond subregion it is aerobic, can promote the generation of nitrification, at the same ammonia nitrogen due to Cation exchange effect occurs for metal cation in slag, can also be partially removed；Then, sewage flows through bottom connectivity layer and reached Bottom conductive packing layer in the upstream pond of the right, during this, the route that sewage flows through in matrix lengthens significantly, matrix To in matrix microbe act on time it is also corresponding lengthen, substantially increase the ratio that pollutant is removed.On and The state of part anaerobism, promotes the progress of anti-nitration reaction, hence it is evident that improve the ability of the denitrogenation of system in row stream pond.Finally Sewage flows through graphite felt cathode layer, and the Radial Oxygen Loss from Root effect and graphite felt surface due to reed directly and air contact, can sources Source is continuous to provide oxygen to negative electrode, improve the efficiency that negative electrode receives electronics.Acted on simultaneously in absorption and sorption of root system of plant etc. Under, and under the collective effect of negative electrode and the microorganism being attached to around negative electrode, remaining organic matter and nitrogen, phosphorus are further in sewage It is removed, for sewage by outlet pipe bleeder after collector pipe is collected, hydraulic detention time is 7 days after purification.
Test result indicates that：When using the IVCW-MFC coupled systems using slag as anode to handle the type sewage, electricity production Power reaches 24.74mW/m2, electricity production it is more conventional using activated carbon granule be anode when improve 173.0%.COD is gone in sewage Except rate be up to 93.7%, TN clearances for 93.5%, TP clearances up to 92.1%, be by matrix of slag apparently higher than with gravel etc. The constructed wetland device of matrix.Water outlet pH is 8.1 simultaneously, alleviates the problem of water outlet is in easily strong basicity to a certain extent.

Claims (5)

1. it is a kind of using slag as the synchronous electrogenesis of anode and the device of sewage purification, including downstream pond（1）With upstream pond （8）, described downstream pond（1）With upstream pond（8）Circulated layer by bottom（7）Connection, described downstream pond（8）Top Water inlet pipe is set（2）And water distributor（3）, described upstream pond（1）Top sets collector pipe（11）And outlet pipe（12）, it is special Sign is：Described downstream pond（1）In set gradually from top to bottom as top non-conducting filler layer（4）With slag anode layer （5）, slag anode layer（5）In bury current collector（6）；Described upstream pond（8）Set gradually from bottom to up as bottom Non-conducting filler layer（9）And cathode layer（10）, current collector（6）And cathode layer（10）Pass through wire respectively（14）With resistance box （15）Connection composition closed-loop path, top non-conducting filler layer（4）With cathode layer（10）Middle plantation wetland plant（13）, it is described Downstream pond（1）Middle and upper part non-conducting filler layer（4）Thickness is 10-30cm, slag anode layer（5）Thickness is 5-25cm；Bottom Circulate layer（7）Thickness is 3-20cm；Upstream pond（8）Middle bottom non-conducting filler layer（9）Thickness is 5-25cm；Cathode layer（10） Thickness is 3-15cm, wherein downstream pond（1）Mesostroma is than upstream pond（8）Mesostroma is high；Described slag anode layer（5）It is interior Current collector（6）For stainless steel grid or graphite carbon rod.
2. according to claim 1 a kind of using slag as the synchronous electrogenesis of anode and the device of sewage purification, its feature exists In：Described top non-conducting filler layer（4）, bottom circulation layer（7）And bottom non-conducting filler layer（9）Interior filler be gravel, 1 kind or 2 to 5 kinds of any combination in zeolite, anthracite, biological ceramic particle and quartz sand, particle diameter 0.5-10mm.
3. according to claim 1 a kind of using slag as the synchronous electrogenesis of anode and the device of sewage purification, its feature exists In：Described wetland plant（13）For Lythrum salicaria, cyperus alternifolius, wild rice stem, canna, water sweet thatch, Value of Spartina Anglica, Arundinella hirta (Thunb.) Tanaka, calamus, reed 1 kind or 2 to 12 kinds of any combination in reed, napier grass, floral leaf Lu Di and iris.
4. according to claim 1 a kind of using slag as the synchronous electrogenesis of anode and the device of sewage purification, its feature exists In：Described slag anode layer（5）Interior filler is discarded slag, is any in vessel slag, open hearth slag, electroslag；Slag Particle diameter is 1-8mm, packed density 0.35-0.65g/cm3。
5. according to claim 1 a kind of using slag as the synchronous electrogenesis of anode and the device of sewage purification, its feature exists In：Described cathode layer（10）Interior conductive material is any in graphite particle, activated carbon granule, graphite felt, stainless steel； Described graphite particle, the particle diameter of activated carbon granule are 1-5mm, insertion stainless (steel) wire or stone in graphite particle or activated carbon granule Black carbon-point.
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