CN202749457U - Double-cylinder type microbial fuel cell using waste water in pig farm as fuel - Google Patents

Abstract

The utility model relates to a double-cylinder type microbial fuel cell using waste water in a pig farm as fuel. The double-cylinder type microbial fuel cell comprises a cation exchange membrane, a graphite carbon felt or carbon fiber, a load R, a cylinder outer wall, an air distribution device, an aeration machine, a peristaltic pump, a cathode chamber, an anode chamber, a circulating water pipe, a mercurous chloride electrode, a rubber plug, a graphite rod, an electric clamp, a data acquisition unit and a notebook computer. The fuel cell has the advantages that the removal rate of organic matters in the wastewater in the pig farm reaches a high level of the removal rate of the organic matters removed by the traditional anaerobic technology, simultaneously the cost of a reactor can be reduced, and the power generation efficiency is improved.

Description

A kind of two cylinder type microbiological fuel cells take piggery wastewater as fuel

Technical field

The utility model relates to a kind of device that can remove the organic substance of piggery wastewater and carry out electrogenesis, belongs to microbiological fuel cell and Summarization for Piggery Wastewater Treatment Technology field.

Background technology

For a long time, leading sewage treatment area for many years take anaerobic bio-treated and aerobic biological treatment as main traditional Summarization for Piggery Wastewater Treatment Technology, but because its expensive cost of sewage disposal and to the restriction of the waste water of high concentration, more and more be subjected to the restriction of global performance source problem in short supply by now, also become the obstruction that China's economy further develops.The organic substance that contains a large amount of easily biological-degradables in the organic wastewater, and traditional sewage disposal technology can not effectively utilize it, simultaneously toward the generation of contact with problem of environmental pollution.If can effectively utilize these materials, and convert it into free of contamination clean energy resource, just can overcome the intrinsic drawback of traditional wastewater treatment technology, and will fundamentally alleviate water pollution and energy starved problem.

Microbiological fuel cell (microbial fuel cell, MFC) technology is as a kind of novel sewage disposal technology, has the effect that can directly obtain electric energy output when purifying waste water, be subject in recent years the extensive concern of international academic community, be considered the treatment technology of a kind of high benefit, low energy consumption, clean environment firendly.It is not only the optimization of sewage disposal technology, and the innovation of especially sewage disposal theory has huge development potentiality.But owing to being subject to the restriction of numerous technical elements factors, MFC still has a segment distance from practical application, and at present correlative study is just at the early-stage.

At present because MFC electrogenesis power density is low, and electrode material and exchange membrane involve great expense, reactor configuration uncertain, the research of relevant MFC is still at the experimental stage, also is difficult to realize commercial applications.Therefore, need to fully holding on the characteristics of the multidisciplinary intersection of MFC, carry out the electrochemical properties of MFC and the basic research of organic matter degradation effect.Therefore research and development are fit to two cylinder type microbiological fuel cells (DCMFC) for the treatment of of Organic Wastewater characteristics, further improve the electrogenesis power density of MFC and reduce capital construction and operating cost expense, its real application research is had important directive significance.

Summary of the invention

The purpose of this utility model provides a kind of novel microbial fuel cell that integrates piggery wastewater and other sewage disposals and electrogenesis.

The composition of described in the utility model pair of cylinder type microbiological fuel cell comprises cation-exchange membrane, graphite carbon felt or carbon fiber, load R, cylinder outer wall, gas pipe, aerator, peristaltic pump, cathode chamber, anode chamber, circulating water pipe, calomel electrode, rubber stopper, graphite rod, electric folder, data acquisition unit, notebook computer.

The main body of device adopts the cylindrical polymethyl methacrylate pipe of long 200mm, internal diameter 120mm to make, inner core adopts cation-exchange membrane to surround the cylindric of long 200mm, diameter 80mm, inner core is cathode chamber, surround the anode chamber between inner core and the urceolus, the empty bed volume of cathode chamber and anode chamber is 1L, and the anode chamber's dischargeable capacity behind the adding electrode is 650mL; Cathode electrode adopts the graphite rod of long 200mm, diameter 20mm, surface area 125.6 cm ²Anode electrode adopts the carbon felt of thick 3mm, and 14cm * 18cm, surface area are 252cm ²The upper end, anode chamber is provided with a circular port, is used for sampling and electrode potential and measures, and establishes the rubber capping; The anode chamber lays the ring-type aeration tube in the bottom; Cylindrical body outer wall plane of symmetry upper and lower sides has each one of intake-outlet, and outer and peristaltic pump joins by circulating water pipe; Use belt electrode to adopt the titanium silk to draw, the external circuit wire uses copper wire wire, external variable resistive load R; Collector is connected with load R two ends, connects computer again, stores, shows the data that gather.

The utility model has the advantage of:

1. electrode adopts cheap carbon felt electrode and graphite rod, reduces reactor cost, and has improved efficiency of fuel cell generation.

2. reactor adopts polymethyl methacrylate as main material, with an organic solvent dissolves polymethyl methacrylate, slit between polymethyl methacrylate and the proton exchange membrane is merged fully closely knit, and cathode chamber and anode chamber are strong every sealing.

3. the DCMFC reactor is detachable, is convenient to the reactor periodic flushing, and the antianode electrode material is adjusted transformation.

4. the structure of two cylinder type devices and the use of carbon felt electrode have reduced interelectrode mass transfer spacing, reduce the resistance to mass tranfer of MFC, have improved the electrogenesis energy of device.

5. install stablely, the electrogenesis feature is more obvious.

6. two cylinder type microbiological fuel cells can reach the higher level of traditional anaerobic technique organic matter removal to the organic removal rate of piggery wastewater.

Description of drawings

Fig. 1 is apparatus structure schematic diagram of the present utility model.

1. amberplexes, 2. graphite carbon felts or carbon fiber 3. load R4. cylinder outer walls 5. gas pipes 6. aerators 7. peristaltic pumps 8. cathode chambers 9. anode chambers 10. circulating water pipes, 11. calomel electrodes, 12. rubber stoppers, 13. graphite rods, 14. electricity folders, 15. data acquisition units, 16. notebook computers among the figure.

Fig. 2 utilizes the utility model to process the start-up course output voltage situation of change of piggery wastewater.

Abscissa is time/h among the figure, and ordinate (left side) is output voltage/mV, and ordinate (right side) is anode electrode electromotive force/mV, and ■ is output voltage, the ★ anode potential.A. inject for the first time the anode substrate B. change anode substrate C. for the second time and change for the third time the 4th replacing of anode substrate D. anode substrate.

Fig. 3 utilizes the utility model to process the initial COD concentration of piggery wastewater to be the as a result figure of 933.70mg/L.

Abscissa is time/h among the figure, and ordinate (left side) is output voltage/mV, and ordinate (right side) is anode electrode electromotive force/mV, and ■ is output voltage, ▲ anode potential.

Fig. 4 utilizes the utility model to process the polarization curve test result figure of piggery wastewater.

Abscissa is electric current/mA among the figure, and ordinate (left side) is output voltage/mV, and ordinate (right side) is power density/mW ﹒ m ²--, 1-7 is volt-ampere curve, 8-14 is polarization curve.

Embodiment

Be illustrated by reference to the accompanying drawings

Fig. 1 is the utility model structural representation.The composition of described in the utility model pair of cylinder type microbiological fuel cell comprises cation-exchange membrane, graphite carbon felt or carbon fiber, load R, cylinder outer wall, gas pipe, aerator, peristaltic pump, cathode chamber, anode chamber, circulating water pipe, calomel electrode, rubber stopper, graphite rod, electric folder, data acquisition unit, notebook computer.

The main body of device adopts the cylindrical polymethyl methacrylate pipe of long 200mm, internal diameter 120mm to make, inner core adopts cation-exchange membrane to surround the cylindric of long 200mm, diameter 80mm, inner core is cathode chamber, surround the anode chamber between inner core and the urceolus, the empty bed volume of cathode chamber and anode chamber is 1L, and the anode chamber's dischargeable capacity behind the adding electrode is 650mL.Cathode electrode adopts the graphite rod of long 200mm, diameter 20mm, surface area 125.6 cm ²Anode electrode adopts the carbon felt of thick 3mm, and 14cm * 18cm, surface area are 252cm ²The upper end, anode chamber is provided with a circular port, is used for sampling and electrode potential and measures, and establishes the rubber capping.The anode chamber lays the ring-type aeration tube in the bottom.Cylindrical body outer wall plane of symmetry upper and lower sides has each one of intake-outlet, and outer and peristaltic pump joins by circulating water pipe.Use belt electrode to adopt the titanium silk to draw, the external circuit wire uses copper wire wire, external variable resistive load R.Collector is connected with load R two ends, connects computer again, stores, shows the data that gather.

Fig. 2 utilizes the utility model to process the start-up course output voltage situation of change of piggery wastewater, at first the concentration at the anode chamber of 650mL injection table 2.2 is the dextrose culture-medium 500mL of 1000mgCOD/L, actual piggery wastewater 150mL(accounts for 25%), in negative electrode, fill with the K of 30mM ₃[Fe (CN) ₆] and the KCl solution of 10mM.Output voltage gathers curve successively through rising, stablizing and this all after date that descend, actual piggery wastewater with 50% and simulated wastewater mixture are changed anolyte, then enter next electrogenesis cycle, progressively bring up to whole use piggery wastewaters according to 25% ratio successively afterwards and change anolyte, DCMFC is after changing the anode substrate through 4 times (D), but the voltage immediate recovery is to level and stable in early stage, can think that the electrogenesis microbe has been tamed actual waste water this moment to have finished.

Fig. 3 utilizes the utility model to process the initial COD concentration of piggery wastewater to be the as a result figure of 933.70mg/L.Whole process continues the electrogenesis time and reaches the 98.1h(output voltage and be down to 200mV and be decided to be terminal point), the electrogenesis platform duration is 75.0h approximately.Its anode potential can reach-391mV, and output voltage is up to 534mV, and electric current reaches 5.34mA, and power output reaches 2.85mW(114mW/m ²), the COD clearance reaches 67.87%.

Fig. 4 utilizes the utility model to process the polarization curve test result figure of piggery wastewater.Initial COD concentration is brought up to 1000mg/L from 200mg/L maximum power density can be brought up to 723.84mW/ ㎡ (34.73mA) from 428.65mW/ ㎡ (18.90mA).Continue afterwards to improve initial COD concentration to 1500mg/L and 2000mg/L, the maximum power of acquisition is respectively 599.14mW/ ㎡ (31.60mA) and 735.00mW/ ㎡ (35.00mA).

Claims (1)

1. two cylinder type microbiological fuel cells take piggery wastewater as fuel, it is characterized in that: described pair of cylinder type microbiological fuel cell comprises cation-exchange membrane, graphite carbon felt or carbon fiber, load R, cylinder outer wall, gas pipe, aerator, peristaltic pump, cathode chamber, anode chamber, circulating water pipe, calomel electrode, rubber stopper, graphite rod, electric folder, data acquisition unit, notebook computer;

The main body of device adopts the cylindrical polymethyl methacrylate pipe of long 200mm, internal diameter 120mm to make, inner core adopts cation-exchange membrane to surround the cylindric of long 200mm, diameter 80mm, inner core is cathode chamber, surround the anode chamber between inner core and the urceolus, the empty bed volume of cathode chamber and anode chamber is 1L, and the anode chamber's dischargeable capacity behind the adding electrode is 650mL; Cathode electrode adopts the graphite rod of long 200mm, diameter 20mm, surface area 125.6 cm ²Anode electrode adopts the carbon felt of thick 3mm, and 14cm * 18cm, surface area are 252cm ²The upper end, anode chamber is provided with a circular port, is used for sampling and electrode potential and measures, and establishes the rubber capping; The anode chamber lays the ring-type aeration tube in the bottom; Cylindrical body outer wall plane of symmetry upper and lower sides has each one of intake-outlet, and outer and peristaltic pump joins by circulating water pipe; Use belt electrode to adopt the titanium silk to draw, the external circuit wire uses copper wire wire, external variable resistive load R; Collector is connected with load R two ends, connects computer again, stores, shows the data that gather.

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