CN205368060U - Use device of slag as synchronous product electricity of anodal and sewage purification - Google Patents

Use device of slag as synchronous product electricity of anodal and sewage purification Download PDF

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Publication number
CN205368060U
CN205368060U CN201620092636.8U CN201620092636U CN205368060U CN 205368060 U CN205368060 U CN 205368060U CN 201620092636 U CN201620092636 U CN 201620092636U CN 205368060 U CN205368060 U CN 205368060U
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China
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slag
layer
pond
anode
sewage
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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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Institute of Hydrobiology of CAS
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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
    • Y02W10/30—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

Abstract

The utility model discloses an use device of slag as synchronous product electricity of anodal and sewage purification packs through regard as cell anode with the slag, simultaneously as in the embedding integrated vertical -flow constructed wetland system of packing, has formed the novel structural approach of microbiological fuel cell and constructed wetland phase coupling. The system lays in the downstream pond and to set gradually to upper portion non -conductive filler layer, slag anode layer under to from last, buries current collector in the slag anode layer underground, supreme setting gradually to bottom non -conductive filler layer, negative pole layer is down followed in the upstream pond, bottom intercommunication pond intercommunication is passed through with the upstream pond in the downstream pond, and current collector and negative pole layer connect to form closed -loop through wire and resistance box respectively. With slag electrode landfill to microbiological fuel cell positive pole while and integrated vertical -flow constructed wetland phase coupling, realize synchronous double effect usefulness of producing electricity and sewage purification, improvement positive pole electronic transmission efficiency reduces internal resistance of cell, has improved the product electrical property, solves quality of water simultaneously and the acidizing problem appears.

Description

A kind of with slag be anode synchronous electrogenesis and the device of sewage purification
Technical field
This utility model belongs to sewage treatment area, be specifically related to a kind of with slag be anode synchronous electrogenesis and the device of sewage purification, coupled with microbiological fuel cell by composite vertical current artificial wetland and realize electrogenesis and sewage purification.
Background technology
Energy crisis and environmental pollution and consequent society, Climatic issues etc. have become as the focus that the whole world is paid close attention to.Develop clean energy resource and recycling economy with " minimizing, resource and recycling " for principle, be the important channel building a resource-conserving and environment-friendly society and realizing sustainable development.Exploitation, utilize based on solar energy, nuclear energy, wind energy, biomass energy clean energy resource be substitute traditional energy, solve the inevitable choice of energy crisis, the strategic requirement that Ye Shi China future source of energy develops.
It is first propose in the enforcement period of the ninth five-year plan European Union's international cooperative project by Chinese Academy of Sciences's aquatile institute and the shared such as Cologne, Germany university, Austria Vienna agriculture university that composite vertical current artificial wetland processes system (IntegratedVerticalFlowConstructedwetland, IVCW).The descent activation water flow mode of this technique uniqueness efficiently solves " short circuit " phenomenon that other types wetland easily occurs, and define that subregion, downstream pond is aerobic, the compound water purification structure of downstream pond part anaerobism, promote nitrification and denitrification effect, significantly improve the denitrification effect (Wu Zhenbin of system, composite vertical current artificial wetland, Science Press, Beijing, 2008).
Microbiological fuel cell (Microbialfuelcell, MFC) is to utilize microbe-catalytic oxidization Organic substance and inorganic matter and produce the device of electric energy, it is possible to for wastewater treatment, and it is low to consume energy, and becomes the study hotspot of environmental area in recent years.
Composite vertical current artificial wetland can pass through wetland plant with microbiological fuel cell, microorganism, substrate, electrode realize integrated combination, form the coupled system of composite vertical current artificial wetland-microbiological fuel cell (IVCW-MFC), utilize the wetland plant photosynthesis conversion solar can for electric energy, electric energy can be reclaimed while purifying sewage, by becoming a kind of new model of the lasting renewable energy power generation of distributing, there is good development prospect.
Research currently, with respect to IVCW-MFC coupled system is at the early-stage, and wherein the research of electrode has great significance for reducing operating cost, raising power density and purification of water quality usefulness.Good electrode configuration needs to provide, for microorganism, big bond area of trying one's best, and realizes effective electronics simultaneously and collects.Being used in the electrode material in IVCW-MFC system mainly has graphite felt, graphite cake, granular active carbon (GAC), stainless (steel) wire and carbon cloth now.Wherein GAC is considered the optimum anode material as plant electrogenesis system, and its particle diameter is little, rough surface, electrogenesis and sewage purification performance more excellent (ArendsJBA, londeelV, TennisonSR, BoonN, andVerstraeteW, Suitabilityofgranularcarbonasananodematerialforsedimentm icrobialfuelcells, inJ.SoilsSediment, 2012, pp.1197-1206.), but, the price of this material is of a relatively high, and practicality is not high.
Slag, a kind of industrial solid wastes, output, is about the 15 ~ 20% of crude steel yield.Slag is mainly made up of the oxide of calcium, ferrum, silicon, magnesium and a small amount of aluminum, manganese, phosphorus etc..Main mineral facies are the solid solution that formed of oxide of tricalcium silicate, dicalcium silicate, monticellite, calcium and magnesium rhodonite, calcium aluminoferrite and silicon, magnesium, ferrum, manganese, phosphorus, possibly together with a small amount of free calcium oxide and metallic iron, fluor-apatite etc., possesses bigger phosphorus adsorption capacity in theory.Current slag is used as the research of IVCW-MFC system anode material and there is no report both at home and abroad.
Summary of the invention
The purpose of this utility model be in that to provide a kind of with slag be anode synchronous electrogenesis and the device of sewage purification, slag electrode fills anode of microbial fuel cell be coupled with composite vertical current artificial wetland simultaneously, realize the double utility of synchronous electrogenesis and sewage purification, improve anode current efficiency of transmission, reduce the internal resistance of cell, improve electricity generation performance.
For achieving the above object, this utility model adopts techniques below measure:
Technical scheme: core of the present utility model is based on composite vertical current artificial wetland structure, by filling slag anode layer, biological-cathode layer, define microbiological fuel cell and new structure method that artificial swamp is coupled, the method is by using slag as galvanic anode, improve anode current efficiency of transmission, reduce the internal resistance of cell, thus improve the electricity generation performance of IVCW-MFC system；On the other hand, by the slag absorption to phosphor in sewage, and substrate and the root system of plant purification to other pollutant, it is possible to the sewage purification ability of strengthening IVCW-MFC system.
A kind of with slag be anode synchronous electrogenesis and the device of sewage purification, coupled with microbiological fuel cell by composite vertical current artificial wetland and realize electrogenesis and sewage purification, including downstream pond and upstream pond, described downstream pond is connected by bottom circulation layer with upstream pond, described top, downstream pond arranges water inlet pipe and water distributor, and described top, upstream pond arranges collector pipe and outlet pipe；Described downstream pond sets gradually from top to bottom into top non-conducting filler layer and slag anode layer, described slag anode layer buries current collector underground；Described upstream pond sets gradually as bottom non-conducting filler layer and cathode layer from bottom to up, current collector and cathode layer connect to form closed-loop path respectively through wire and resistance box, top non-conducting filler layer and plantation wetland plant in cathode layer, described middle and upper part, downstream pond non-conducting filler layer thickness is 10-30cm, and slag anode layer thickness is 5-25cm；Bottom circulation layer thickness is 3-20cm；In upstream pond, bottom non-conducting filler layer thickness is 5-30cm；Cathode electrode layer thickness is 3-15cm, and wherein downstream pond mesostroma is higher than upstream pond mesostroma；In described slag anode layer, current collector is rustless steel grid or graphite carbon rod.
In filler in described top non-conducting filler layer, bottom circulation layer, in filler and bottom non-conducting filler layer, filler is the combination in any of a kind in gravel, zeolite, anthracite, biological ceramic particle and quartz sand or 2 to 5 kinds, and particle diameter is 0.5-10mm.
Described top non-conducting filler layer is the combination in any of a kind or 2 to 12 kinds in Herba Lythri Salicariae, cyperus alternifolius Caulis Zizaniae caduciflorae, Canna generalis Bailey, the sweet thatch of water, Value of Spartina Anglica, Arundinella hirta (Thunb.) Tanaka, Rhizoma Acori Graminei, phragmites communis, grassiness, floral leaf Lu Di and Rhizoma Iridis Tectori with the wetland plant of plantation in cathode layer.
In described slag anode layer, filler is discarded slag, in vessel slag, open hearth slag, electroslag any one；Slag particle diameter is 1-8mm, and packed density is 0.35-0.65g/cm3。
In described cathode layer, conductive material is any one in graphite granule, activated carbon granule, graphite felt and stainless steel；Time wherein with graphite granule or activated carbon granule for negative electrode filler, particle diameter is 1-5mm, to insert current collector stainless (steel) wire or graphite carbon rod simultaneously.
With slag be anode synchronous electrogenesis and the process of sewage purification water be:
The first water inlet pipe entrance from downstream pond, the left side of A, sewage (including micro-polluted surface water, Polluted Groundwater and sanitary sewage), arrive water distributor and realize water distribution uniformity, and along top non-conducting filler layer vertically downward, this layer of kind is implanted with wetland plant, and root system of plant is dispersed in hypothallus.Acting on due to the absorption and sorption of root system of plant etc. in this process, the absorption of substrate, crown_interception, and the metabolism of microorganism in substrate, in sewage, partial organic substances and float are removed efficiently, and TN and TP also part is removed；
B, flow through slag anode layer through the sewage of step A, Organic substance and the Organic substance of plant root exudation in sewage are attached to the electrogenesis bacterium on slag and utilize, release electronics, in slag, metal-oxide is as mediator, help electronics to be fast and effeciently delivered to anode surface to be collected by current collector, it is delivered on external circuit, arrives cathode layer finally by outer meeting resistance case and form closed-loop path, produce electric energy.In this process, dirty Organic substance in water is consumed in a large number, phosphorus is substantially reduced due to the physical absorption of slag, chemisorbed and precipitation content, nitrogen due in downstream pond subregion aerobic, the generation of Nitrification can be promoted, simultaneously ammonia nitrogen due to metal cation generation cation exchange interaction in slag, also can be partially removed；
C, through gradient owing to having 0.5% bottom whole system of the sewage of step B, sewage can flow automatically and arrive the upstream pond on the right through bottom circulation layer, again owing to downstream pond, the left side is than upstream pond substrate floor height, current can automatically flood upstream pond substrate and enter non-conducting filler layer, in this process, the route that sewage flows through in substrate lengthens significantly, and substrate is also corresponding to the time of microbe effect in substrate to be lengthened, and substantially increases the removed ratio of pollutant.And the state of part anaerobism in upstream pond, promote the carrying out of anti-nitration reaction, hence it is evident that improve the ability of the denitrogenation of system；
D, finally flow into middle and upper part, upstream pond cathode layer through the sewage of step C, it is air biological-cathode due to what adopt, this layer of kind has wetland plant, Radial Oxygen Loss from Root effect due to plant, and negative electrode top layer is direct and air contact, can must provide oxygen to negative electrode continually, improve negative electrode and receive the efficiency of electronics.Simultaneously under the effects such as the absorption and sorption of root system of plant, and negative electrode is with under the combined effect of the microorganism being attached to around negative electrode, and in sewage, remaining Organic substance and nitrogen, phosphorus are removed further, after purification sewage after collector pipe is collected by outlet pipe bleeder.
This utility model compared with prior art, has the following advantages that and effect:
(1) discarded slag recycling.This utility model adopts slag as galvanic anode filler, make discarded slag be utilized effectively.
(2) cost is reduced.Compared with the electrodes such as in this utility model, IVCW-MFC coupled system is realizing on the basis of synchronous electrogenesis and sewage disposal, the granular active carbon (GAC) conventional with traditional IVCW-MFC system, greatly reduce the cost of battery.Compared with the customary filler sandstone of artificial swamp, anthracite etc., it is greatly reduced the operating cost of system.
(3) strengthening electrogenesis flora efficiency of transmission, improves electrogenesis usefulness.The electro-chemical activity microorganism of MFC anode is mainly made up of alienation metal reducing miroorganisms.Outer cytochrome C has high affinity to metal-oxide with the born of the same parents of alienation metal reducing miroorganisms, it is possible to be reduced as electron acceptor, with metal ion or its oxide (Mn2+、Ni2+、Fe3O4、Ni2+Deng) electrode is modified, it is possible to significantly improving the work efficiency of electrode, slag itself has stronger electric conductivity, and particle diameter is less, rough surface, and rich in the metal-oxide such as ferrum, manganese, Fe in slag3O4As mediator, electronics efficiency of transmission from electrogenesis bacterium to anode surface can being improved Deng metal-oxide, reducing ohmic internal resistance and the polarization resistance of anode, thus improving the electrogenesis usefulness of IVCW-MFC system.
(4) absorption property of phosphorus is better.Slag is as the filling substrate of artificial swamp, the removal effect of phosphorus is better, average removal rate can up to 91.9%, slag is except being there is physical absorption by self in phosphorus element, with phosphate from sewage generation chemical reaction, precipitation can be there is further in the metal ions such as calcium ion in self mineral composition composition, aluminium ion.
(5) there is water outlet easily in alkaline problem as a kind of potential wet land filler in slag itself, and in MFC running, along with electronics transfers to negative electrode through external circuit, in order to maintain the ion concentration of anode and negative electrode, only H+Move to negative electrode or OH-Move round about, and except H+Cation in addition or OH-The migration of anion in addition can cause that accumulation causes Concentraton gradient and increases, anode chamber pH is declined, acidifying problem occurs, slag is used as IVCW-MFC system anode filler, in slag rich in cation just can reduce anode and cathode Concentraton gradient, just can solve the problems referred to above.
(6) adopt composite vertical current artificial wetland (IVCW) technique to couple with MFC, extend the path that sewage flows through in substrate on the one hand, improve the substrate clean-up effect to sewage；Another aspect subregion, downstream pond is aerobic, the compound water purification structure of upstream pond part anaerobism, has promoted nitrification and denitrification effect, hence it is evident that improve the denitrification effect of system.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of vertical current constructed wetland coupling microbiological fuel cell.
Wherein, 1-downstream pond；2-water inlet pipe；3-water distributor；4-top non-conducting filler layer；5-slag anode layer；6-current collector；Connectivity layer bottom 7-；8-upstream pond；Non-conducting filler layer bottom 9-；10-cathode layer；11-collector pipe；12-outlet pipe；13-wetland plant；14-wire；15-resistance box.
Detailed description of the invention
Below in conjunction with accompanying drawing 1, the specific embodiment of utility model is explained and illustrated, is not intended that restriction of the present utility model.
Embodiment 1:
As shown in Figure 1, a kind of with slag be anode synchronous electrogenesis and the device of sewage purification, coupled with microbiological fuel cell by composite vertical current artificial wetland and realize electrogenesis and sewage purification, cylindrical pvc pipe is made " U " type (H=50cm, D=15cm), " U " type pipe left side as downstream pond 1, the right as upstream pond 8, intermediate connection partly as bottom circulate layer 7, bottom circulation layer 7 from left to right downward-sloping 0.5%, arranges water inlet pipe 2, water distributor 3, top non-conducting filler layer 4 and slag anode layer 5 in the downstream pond 1 on the left side；The upstream pond 8 on the right arranges bottom non-conducting filler layer 9, cathode layer 10, collector pipe 11 and outlet pipe 12, downstream pond 1 sets gradually from top to bottom into top non-conducting filler layer 4 and slag anode layer 5, slag anode layer 5 is buried underground current collector 6；Upstream pond 8 sets gradually from bottom to up as bottom non-conducting filler layer 9 and cathode layer 10；Current collector 6 and cathode layer 10 connect to form closed-loop path respectively through wire 14 and resistance box 15.
Filling gravel in middle and upper part, downstream pond 1 non-conducting filler layer 4, laying depth H=30cm, grain size of gravel is 5-10mm；Filling the slag taking from Wuhan steel plant in slag anode layer 5, laying depth H=10cm, slag particle diameter is 1-8mm, and packed density is 0.45g/cm3, slag inserts stainless (steel) wire as current collector 3；Filled stone sand in bottom circulation layer 7, laying depth is H=15cm, and quartz sand particle size is 0.5-1mm；Filling gravel in the non-conducting filler layer 9 of bottom in upstream pond 8, laying depth H=30cm, grain size of gravel is 5-10mm；Cathode layer 10 height H=3cm, is laid on gravel with graphite felt for electrode material, makes do not have graphite felt, graphite felt thickness D=6mm into water sewage；Middle and upper part, downstream pond 1 non-conducting filler layer 4 is all Canna generalis Bailey (each 3 strains) with wetland plant 13 in cathode layer 10 in upstream pond 8；Resistance box 15 is set to 1000 Europe.
Wherein water inlet is the sanitary sewage of laboratory autogamy, and this 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 peristaltic pump by this system, the flow set of pump is 1.5ml/min, sewage first water inlet pipe entrance from downstream pond, the left side, arrive water distributor and realize water distribution uniformity, and along top non-conducting filler layer vertically downward, this process acts on due to the absorption and sorption of Canna generalis Bailey root system etc., the absorption of substrate, crown_interception, and the metabolism of microorganism in substrate, in sewage, partial organic substances and float are removed efficiently, and TN and TP also part is removed；Sewage flows into slag anode layer subsequently, Organic substance and the Organic substance of Canna generalis Bailey root system secretion in sewage are attached to the electrogenesis bacterium on slag and utilize, release electronics, in slag, metal-oxide is as mediator, help electronics to be fast and effeciently delivered to anode surface to be collected by current collector, it is delivered on external circuit, arrives cathode layer finally by outer meeting resistance case and form closed-loop path, produce electric energy.In this process, dirty Organic substance in water is consumed in a large number, phosphorus is substantially reduced due to the physical absorption of slag, chemisorbed and precipitation content, nitrogen due in downstream pond subregion aerobic, the generation of Nitrification can be promoted, simultaneously ammonia nitrogen due to metal cation generation cation exchange interaction in slag, also can be partially removed；Then, sewage flows through bottom connectivity layer and arrives the bottom conductive packing layer in upstream pond, the right, and in this process, the route that sewage flows through in substrate lengthens significantly, substrate is also corresponding to the time of microbe effect in substrate to be lengthened, and substantially increases the removed ratio of pollutant.And the state of part anaerobism in upstream pond, promote the carrying out 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, due to the Radial Oxygen Loss from Root effect of Canna generalis Bailey and graphite felt surface directly and air contact, can must provide oxygen to negative electrode continually, improve negative electrode and receive the efficiency of electronics.Simultaneously under the effects such as the absorption and sorption of root system of plant, and negative electrode with under the combined effect of the microorganism being attached to around negative electrode, in sewage, remaining Organic substance and nitrogen, phosphorus are removed further, and after purification, sewage is by outlet pipe bleeder after collector pipe is collected, and hydraulic detention time is 7 days.
Test result indicate that: when adopting the IVCW-MFC coupled system being anode with slag to process the type sewage, electrogenesis power reaches 23.20mW/m2, electrogenesis amount more conventional use activated carbon granule improves 156.0% when being anode.In sewage, COD clearance is up to 94.8%, and TN clearance is 93.3%, and TP clearance reaches 92.3%, with slag for substrate apparently higher than the constructed wetland device being substrate with gravel etc..Water outlet pH is 8.0 simultaneously, alleviates water outlet to a certain extent easily in alkaline problem.
Embodiment 2:
As shown in Figure 1, a kind of with slag be anode synchronous electrogenesis and the device of sewage purification, coupled with microbiological fuel cell by composite vertical current artificial wetland and realize electrogenesis and sewage purification, cylindrical pvc pipe is made " U " type (H=50cm, D=15cm); U " the type pipe left side partly as bottom circulation layer 7, arranges water inlet pipe 2, water distributor 3, top non-conducting filler layer 4, slag anode layer 5 as upstream pond 8, intermediate connection as downstream pond 1, the right in the downstream pond 1 on the left side；The upstream pond 8 on the right arranges bottom non-conducting filler layer 9, cathode layer 10, collector pipe 11, outlet pipe 12, it is characterized in that, downstream pond 1 sets gradually from top to bottom into top non-conducting filler layer 4, slag anode layer 5, slag anode layer 5 is buried underground current collector 6；Upstream pond 8 sets gradually from bottom to up as bottom non-conducting filler layer 9, cathode layer 10；Downstream pond 1 connects pond 7 with lower upstream pond 8 by bottom and connects, and current collector 6 and cathode layer 10 connect to form closed-loop path respectively through wire 14 and resistance box 15.
Filling anthracite in middle and upper part, downstream pond 1 non-conducting filler layer 4, laying depth H=10cm, particle diameter is 5-10mm；Filling the slag taking from Wuhan steel plant in slag anode layer 5, laying depth H=5cm, slag particle diameter is 1-8mm, and packed density is 0.35g/cm3, slag inserts stainless (steel) wire as current collector 3；Filled stone sand in bottom circulation layer 7, laying depth is H=3cm, and quartz sand particle size is 0.5-1mm；Filling gravel in the non-conducting filler layer 9 of bottom in upstream pond 8, laying depth H=10cm, grain size of gravel is 5-10mm；Cathode layer 10 height H=3cm, is laid on gravel with graphite felt for electrode material, makes do not have graphite felt, graphite felt thickness D=6mm into water sewage；With wetland plant 13 respectively Canna generalis Bailey, cyperus alternifolius (each 3 strains) in cathode layer 10 in upstream pond 8 in middle and upper part, downstream pond 1 non-conducting filler layer 4；Resistance box 15 is set to 1000 Europe.
Water inlet is Wuhan eutrophication pond water, and the type water pollutant is characterized as: COD=50 ~ 60mg/L, TN=2 ~ 3mg/L, TP=0.5 ~ 4mg/L, pH=7.5.
Sewage is pumped into device by peristaltic pump by this system, the flow set of pump is 1.5ml/min, sewage first water inlet pipe entrance from downstream pond, the left side, arrive water distributor and realize water distribution uniformity, and along top non-conducting filler layer vertically downward, this process acts on due to the absorption and sorption of Canna generalis Bailey root system etc., the absorption of substrate, crown_interception, and the metabolism of microorganism in substrate, in sewage, partial organic substances and float are removed efficiently, and TN and TP also part is removed；Sewage flows into slag anode layer subsequently, Organic substance and the Organic substance of Canna generalis Bailey root system secretion in sewage are attached to the electrogenesis bacterium on slag and utilize, release electronics, in slag, metal-oxide is as mediator, help electronics to be fast and effeciently delivered to anode surface to be collected by current collector, it is delivered on external circuit, arrives cathode layer finally by outer meeting resistance case and form closed-loop path, produce electric energy.In this process, dirty Organic substance in water is consumed in a large number, phosphorus is substantially reduced due to the physical absorption of slag, chemisorbed and precipitation content, nitrogen due in downstream pond subregion aerobic, the generation of Nitrification can be promoted, simultaneously ammonia nitrogen due to metal cation generation cation exchange interaction in slag, also can be partially removed；Then, sewage flows through bottom connectivity layer and arrives the bottom conductive packing layer in upstream pond, the right, and in this process, the route that sewage flows through in substrate lengthens significantly, substrate is also corresponding to the time of microbe effect in substrate to be lengthened, and substantially increases the removed ratio of pollutant.And the state of part anaerobism in upstream pond, promote the carrying out 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, due to the Radial Oxygen Loss from Root effect of cyperus alternifolius and graphite felt surface directly and air contact, can must provide oxygen to negative electrode continually, improve negative electrode and receive the efficiency of electronics.Simultaneously under the effects such as the absorption and sorption of root system of plant, and negative electrode with under the combined effect of the microorganism being attached to around negative electrode, in sewage, remaining Organic substance and nitrogen, phosphorus are removed further, and after purification, sewage is by outlet pipe bleeder after collector pipe is collected, and hydraulic detention time is 7 days.
Test result indicate that: when adopting the IVCW-MFC coupled system being anode with slag to process the type sewage, electrogenesis power reaches 24.01mW/m2, electrogenesis amount more conventional use activated carbon granule improves 165.0% when being anode.In sewage, COD clearance is up to 94.5%, and TN clearance is 92.3%, and TP clearance reaches 92.4%, with slag for substrate apparently higher than the constructed wetland device being substrate with gravel etc..Water outlet pH is 8.1 simultaneously, alleviates water outlet to a certain extent easily in alkaline problem.
Embodiment 3:
As shown in Figure 1, a kind of with slag be anode synchronous electrogenesis and the device of sewage purification, coupled with microbiological fuel cell by composite vertical current artificial wetland and realize electrogenesis and sewage purification, cylindrical pvc pipe is made " U " type (H=50cm, D=15cm), U " the type pipe left side is as downstream pond 1, the right is as upstream pond 8, intermediate connection is partly as bottom circulation layer 7, the downstream pond 1 on the left side arranges water inlet pipe 2, water distributor 3, top non-conducting filler layer 4 and slag anode layer 5, the upstream pond 8 on the right arranges bottom non-conducting filler layer 9, cathode layer 10, collector pipe 11 and outlet pipe 12, downstream pond 1 set gradually from top to bottom into top non-conducting filler layer 4 and slag anode layer 5, slag anode layer 5 is buried underground current collector 6；Upstream pond 8 sets gradually from bottom to up and connects to form closed-loop path into bottom non-conducting filler layer 9 and cathode layer 10, current collector 6 and cathode layer 10 respectively through wire 14 and resistance box 15.
Filling zeolite in middle and upper part, downstream pond 1 non-conducting filler layer 4, laying depth H=20cm, the particle diameter of zeolite is 6mm-10mm；Filling the slag taking from Wuhan steel plant in slag anode layer 5, laying depth H=25cm, slag particle diameter is 1-8mm, and packed density is 0.65g/cm3, slag inserts stainless (steel) wire as current collector 3；Filled stone sand in bottom circulation layer 7, laying depth is H=20cm, and quartz sand particle size is 0.5-1mm；Boil bioceramic and anthracite are filled, in the non-conducting filler layer 9 of bottom, in upstream pond 8, laying depth H=30cm, bioceramic and anthracite each account for than for 2:1, bioceramic particle diameter is 0.5mm, anthracite granule size is 1mm, cathode layer 10 with activated carbon granule for filler, laying depth D=10cm, particle diameter is 1mm-5mm, inserts graphite carbon rod as current collector in activated carbon granule；Middle and upper part, downstream pond 1 non-conducting filler layer 4 is all phragmites communis (each 3 strains) with wetland plant 13 in cathode layer 10 in upstream pond 8；Resistance box 8 is set to 1000 Europe.
Wherein water inlet is the sanitary sewage of laboratory autogamy, and this 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 peristaltic pump by this system, the flow set of pump is 1.5ml/min, sewage first water inlet pipe entrance from downstream pond, the left side, arrive water distributor and realize water distribution uniformity, and along top non-conducting filler layer vertically downward, this process acts on due to the absorption and sorption of phragmites communis root system etc., the absorption of substrate, crown_interception, and the metabolism of microorganism in substrate, in sewage, partial organic substances and float are removed efficiently, and TN and TP also part is removed；Sewage flows into slag anode layer subsequently, Organic substance and the Organic substance of Canna generalis Bailey root system secretion in sewage are attached to the electrogenesis bacterium on slag and utilize, release electronics, in slag, metal-oxide is as mediator, help electronics to be fast and effeciently delivered to anode surface to be collected by current collector, it is delivered on external circuit, arrives cathode layer finally by outer meeting resistance case and form closed-loop path, produce electric energy.In this process, dirty Organic substance in water is consumed in a large number, phosphorus is substantially reduced due to the physical absorption of slag, chemisorbed and precipitation content, nitrogen due in downstream pond subregion aerobic, the generation of Nitrification can be promoted, simultaneously ammonia nitrogen due to metal cation generation cation exchange interaction in slag, also can be partially removed；Then, sewage flows through bottom connectivity layer and arrives the bottom conductive packing layer in upstream pond, the right, and in this process, the route that sewage flows through in substrate lengthens significantly, substrate is also corresponding to the time of microbe effect in substrate to be lengthened, and substantially increases the removed ratio of pollutant.And the state of part anaerobism in upstream pond, promote the carrying out 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, due to the Radial Oxygen Loss from Root effect of phragmites communis and graphite felt surface directly and air contact, can must provide oxygen to negative electrode continually, improve negative electrode and receive the efficiency of electronics.Simultaneously under the effects such as the absorption and sorption of root system of plant, and negative electrode with under the combined effect of the microorganism being attached to around negative electrode, in sewage, remaining Organic substance and nitrogen, phosphorus are removed further, and after purification, sewage is by outlet pipe bleeder after collector pipe is collected, and hydraulic detention time is 7 days.
Test result indicate that: when adopting the IVCW-MFC coupled system being anode with slag to process the type sewage, electrogenesis power reaches 24.74mW/m2, electrogenesis amount more conventional use activated carbon granule improves 173.0% when being anode.In sewage, COD clearance is up to 93.7%, and TN clearance is 93.5%, and TP clearance reaches 92.1%, with slag for substrate apparently higher than the constructed wetland device being substrate with gravel etc..Water outlet pH is 8.1 simultaneously, alleviates water outlet to a certain extent easily in alkaline problem.

Claims (5)

1. one kind with slag be anode synchronous electrogenesis and the device of sewage purification, including downstream pond (1) and upstream pond (8), described downstream pond (1) and upstream pond (8) are connected by the bottom layer (7) that circulates, described downstream pond (8) top arranges water inlet pipe (2) and water distributor (3), described upstream pond (1) top arranges collector pipe (11) and outlet pipe (12), it is characterized in that: described downstream pond (1) sets gradually from top to bottom into top non-conducting filler layer (4) and slag anode layer (5), slag anode layer (5) is buried underground current collector (6)；Described upstream pond (8) sets gradually as bottom non-conducting filler layer (9) and cathode layer (10) from bottom to up, current collector (6) and cathode layer (10) connect to form closed-loop path respectively through wire (14) and resistance box (15), top non-conducting filler layer (4) and plantation wetland plant (13) in cathode layer (10), described downstream pond (1) middle and upper part non-conducting filler layer (4) thickness is 10-30cm, and slag anode layer (5) thickness is 5-25cm；Bottom circulation layer (7) thickness is 3-20cm；In upstream pond (8), bottom non-conducting filler layer (9) thickness is 5-25cm；Cathode layer (10) thickness is 3-15cm, and wherein downstream pond (1) mesostroma is higher than upstream pond (8) mesostroma；Described slag anode layer (5) interior current collector (6) is rustless steel grid or graphite carbon rod.
2. according to claim 1 a kind of with slag be anode synchronous electrogenesis and the device of sewage purification, it is characterized in that: described top non-conducting filler layer (4), bottom circulation layer (7) and the combination in any that bottom non-conducting filler layer (9) interior filler is a kind in gravel, zeolite, anthracite, biological ceramic particle and quartz sand or 2 to 5 kinds, particle diameter is 0.5-10mm.
3. according to claim 1 a kind of with slag be anode synchronous electrogenesis and the device of sewage purification, it is characterised in that: described wetland plant (13) is Herba Lythri Salicariae, cyperus alternifolius, Caulis Zizaniae caduciflorae, Canna generalis Bailey, the sweet thatch of water, Value of Spartina Anglica, Arundinella hirta (Thunb.) Tanaka, Rhizoma Acori Graminei, phragmites communis, grassiness, the combination in any of in floral leaf Lu Di and Rhizoma Iridis Tectori a kind or 2 to 12 kinds.
4. according to claim 1 a kind of with slag be anode synchronous electrogenesis and the device of sewage purification, it is characterised in that: described slag anode layer (5) interior filler is discarded slag, in vessel slag, open hearth slag, electroslag any one；Slag particle diameter is 1-8mm, and packed density is 0.35-0.65g/cm3。
5. according to claim 1 a kind of with slag be anode synchronous electrogenesis and the device of sewage purification, it is characterised in that: described cathode layer (10) interior conductive material is any one in graphite granule, activated carbon granule, graphite felt, stainless steel；Described graphite granule, the particle diameter of activated carbon granule are that 1-5mm, graphite granule or activated carbon granule are inserted into stainless (steel) wire or graphite carbon rod.
CN201620092636.8U 2016-01-31 2016-01-31 Use device of slag as synchronous product electricity of anodal and sewage purification Withdrawn - After Issue CN205368060U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105502673A (en) * 2016-01-31 2016-04-20 中国科学院水生生物研究所 Device for simultaneously generating electricity and purifying sewage by taking steel slag as anode
CN109851035A (en) * 2019-01-28 2019-06-07 西安科技大学 A kind of waste water purification device of artificial swamp coupling microbiological fuel cell

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105502673A (en) * 2016-01-31 2016-04-20 中国科学院水生生物研究所 Device for simultaneously generating electricity and purifying sewage by taking steel slag as anode
CN109851035A (en) * 2019-01-28 2019-06-07 西安科技大学 A kind of waste water purification device of artificial swamp coupling microbiological fuel cell

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