CN103265149A - Power supply-free electric adsorption wastewater treatment device and method - Google Patents
Power supply-free electric adsorption wastewater treatment device and method Download PDFInfo
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- CN103265149A CN103265149A CN2013102294664A CN201310229466A CN103265149A CN 103265149 A CN103265149 A CN 103265149A CN 2013102294664 A CN2013102294664 A CN 2013102294664A CN 201310229466 A CN201310229466 A CN 201310229466A CN 103265149 A CN103265149 A CN 103265149A
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Abstract
The invention relates to a power supply-free device which is driven by microbial fuel cells and can treat various types of wastewater through electric adsorption, and a method for wastewater treatment. The device mainly comprises an electric adsorption unit, microbial fuel cells (MFCs) and an external resistor. The MFCs can produce electricity while treating organic wastewater, and the generated electricity can be used for the electric adsorption unit, thus realizing the high-efficiency electric adsorption for non-degradable organic pollutants such as phenolic compounds. Compared with the conventional adsorption, the adsorption of the device has the advantages that the adsorption capacity for the pollutant can be effectively improved, and the property is close to that of the common electric adsorption by virtue of a power supply. Moreover, the device is not additionally provided with a power supply, so that the treatment cost can be reduced, the treatment of other wastewater can be realized by means of the MFCs, and high-efficiency treatment of various types of wastewater can be simultaneously realized, and bright application prospects can be achieved.
Description
Technical field
The invention belongs to new forms of energy and field of environment engineering technology, relate to the device and method that the electro-adsorption that need not additional power source is handled waste water.
Background technology
Microbiological fuel cell (MFCs) is a kind of new device that organism can be converted into electric energy, the organism in the anolyte compartment under action of microorganisms, oxidized generation proton and electronics, electronics is transferred to anode then, arrives negative electrode by external circuit; Proton sees through proton exchange membrane and arrives cathode compartment from the anolyte compartment, at cathode surface, and electronics, proton and electron acceptor(EA) (normally oxygen) water generation reaction under the help of cathod catalyst.Though MFCs can carry out the processing of waste water and the generation of electric energy simultaneously, it is difficult to be applied to reality at present, mainly is because low electrogenesis amount and higher running cost.Therefore, for the new function development of MFCs, more and more receive publicity at present.
Electro-adsorption (Electrosorption) technology is a kind of novel wastewater processing technology that grew up in the last few years, all has removal effect preferably for organic pollutant and mineral ion.The electro-adsorption method mainly is to apply certain voltage between electro-adsorption anode and negative electrode, ion in the solution or the organic molecule of polarization can be under effect of electric field, towards the electrode migration of oppositely charged, enrichment in the electrostatic double layer of electrode surface, thereby the removal of realization ion and organic molecule.Although the common needed voltage of electro-adsorption is lower, it remains needs additional power source, therefore will produce a certain amount of energy consumption.And MFCs (1,2 or a plurality of series connection) is the voltage needs that can satisfy electro-adsorption fully, and this just makes electro-adsorption realize the removal of pollutent under the condition that does not add the electric energy supply.This handles waste water and has good application prospects for alleviating energy dilemma, low-consumption high-efficiency.
Summary of the invention
The objective of the invention is with the electric energy that microbiological fuel cell produces serves as to drive the device and method that realization need not the electro-adsorption processing waste water of additional power source.
Wastewater treatment equipment of the present invention mainly comprises electro-adsorption unit, microbiological fuel cell and external resistance.The electro-adsorption unit mainly comprises pond body, negative electrode and anode composition, can be used for Persistent organic pollutants removals such as phenol; Negative electrode is the better metallic substance of electroconductibility, and anode is porous carbonaceous material; MFCs, electro-adsorption unit and extrernal resistance link to each other by lead.MFCs utilizes readily biodegradable waste water such as sanitary sewage as substrate, is translated into electric energy and constantly provides electric energy to the electro-adsorption unit.
This device process for the treatment of waste water is as follows:
(0.001～0.1M) organic waste water joins in the electro-adsorption unit will to contain finite concentration electrolytic solution; (COD500～5000mg/L) join among the MFCs that has tamed links to each other the anode and cathode of MFCs is corresponding with the anode and cathode of electro-adsorption then, allows the power supply of MFCs as electro-adsorption with a certain amount of waste water.This has just realized not having when various wastewater is descended in outer electric energy input and has removed.
The present invention has following outstanding feature and beneficial effect:
(1) this device combines electro-adsorption and MFCs cleverly, makes the good operation under the condition of no additional power source of electro-adsorption unit.Can reduce the energy consumption of electro-adsorption with MFCs greatly as the power supply of electro-adsorption, thereby save the energy.
(2) can realize removing respectively among electro-adsorption unit, the MFCs various wastewater.
Description of drawings
Fig. 1 is the schematic diagram of apparatus of the present invention;
Embodiment
The present invention is described in further detail by reference to the accompanying drawings by following examples.
(1) composition of apparatus of the present invention
Apparatus of the present invention are mainly by the electro-adsorption unit, and MFCs and an external resistance are formed, and the three is connected in series (as shown in Figure 1).The electro-adsorption unit is made up of negative electrode and anode, and anode is the activated carbon fiber (ACFs) that platinum filament connects, the nickel foam that negative electrode connects for the titanium silk, and two interelectrode spacings are 3.5cm, the liquor capacity of phenol is 100mL in the electro-adsorption unit; MFCs is the air cathode MFCs of a no film, and the substrate that uses among the MFCs is the glucose solution of 1g/L, and what this device adopted is that two MFC series connection are as the power supply of electro-adsorption unit; External resistance mainly is the electric current in the observation circuit.What the voltage of external resistance and electro-adsorption device used is that the automatic data collection device is monitored.
(2) effect that this embodiment obtains
Under the different treatment pattern (common absorption, electro-adsorption and MFC-electro-adsorption), phenol is as shown in the table in the loading capacity of electrode surface after 12 hours.As seen from the table, the loading capacity of phenol will be higher than common absorption under electro-adsorption and the MFC-electro-adsorption condition, has improved 51.7% and 41.7% respectively.In addition, the phenol loading capacity of MFC-electro-adsorption (1.70mmol/g) and electro-adsorption (1.82mmol/g) is close.
| Tupe | Common absorption | Electro-adsorption | The MFC-electro-adsorption |
| Electro-adsorption capacity (mmol/g) | 1.20 | 1.82 | 1.70 |
Under the different starting point concentrations (50,100 and 200mg/L), the loading capacity of phenol is as shown in the table.Along with the increase of initial phenol concentration, the adsorptive capacity of phenol also increases thereupon; When initial concentration was 200mg/L, the adsorptive capacity of phenol had reached 2.32mmol/g; And under the initial phenol concentration of 50mg/L, the adsorptive capacity of phenol only is 0.95mmol/g.
| Initial phenol concentration (mg/L) | 50 | 100 | 200 |
| Electro-adsorption capacity (mmol/g) | 0.95 | 1.70 | 2.32 |
| COD clearance (%) among the MFCs | 77.2 | 75.2 | 74.4 |
In addition, the COD clearance of simulated wastewater (glucose of 1g/L) is relatively near (74.4%-77.2%) among the MFCs under the above-mentioned condition, and this shows that apparatus of the present invention also have removal preferably to waste water.
Therefore apparatus of the present invention can realize the removal of phenol and waste water simultaneously, and need not external power source, thereby have realized the processing of low-consumption high-efficiency.
Claims (4)
1. the electro-adsorption that drives of a microbiological fuel cell that need not additional power source is handled the device of waste water, comprises electro-adsorption unit, microbiological fuel cell (MFCs) and an external resistance; The electro-adsorption unit mainly comprises pond body, negative electrode and anode composition; MFCs provides electric energy for the electro-adsorption unit, and is connected with extrernal resistance by lead.
2. the electro-adsorption that drives according to the described microbiological fuel cell that need not additional power source of claim 1 is handled the device of waste water, it is characterized in that the electro-adsorption anode is porous carbonaceous material, and negative electrode is the better conductivity metallic substance.
3. the electro-adsorption that drives according to the described microbiological fuel cell that need not additional power source of claim 1 is handled the device of waste water, it is characterized in that the MFCs unit can be 1,2 or the serial or parallel connection of a plurality of MFCs.
4. the electro-adsorption that drives of a microbiological fuel cell that need not additional power source is handled the method for waste water, it is characterized in that in the electro-adsorption unit with the metallic substance being negative electrode, is anode with the porousness carbonaceous material.The anode and cathode of MFCs links to each other with negative electrode with the anode of electro-adsorption, powers to the electro-adsorption unit.After the wastewater treatment of MFCs steady running readily biodegradable (COD of waste water can between 500～5000mg/L), pending organic wastewater with difficult degradation thereby is added the electro-adsorption unit, and the ionogen that adds saliferous 0.001～0.1M is handled control electric current 0.1～5mA.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103896371A (en) * | 2014-03-24 | 2014-07-02 | 浙江大学 | Electrochemical flocculation method and device capable of producing electricity |
| CN103979688A (en) * | 2014-05-26 | 2014-08-13 | 东南大学 | Microbial fuel cell coupling electrode bio-membrane nitrogen and phosphorus removal system and application |
| CN105236686A (en) * | 2015-10-30 | 2016-01-13 | 东南大学 | Sewage treatment method for purifying refractory organic pollutants |
| CN105330094A (en) * | 2015-09-06 | 2016-02-17 | 东南大学 | System for removing antibiotics in surface water through using root secretion reinforced wetland coupling system, and method thereof |
| CN106957120A (en) * | 2017-04-17 | 2017-07-18 | 中国石油大学(北京) | Oil-containing sewage treatment system |
| CN108339846A (en) * | 2018-01-18 | 2018-07-31 | 青岛科技大学 | Fuel cell handles the system and method that organic wastewater synchronizes repairing heavy metal in soil |
| CN111422956A (en) * | 2019-01-09 | 2020-07-17 | 中石化三菱化学聚碳酸酯（北京）有限公司 | Method for treating low-concentration phenol-containing wastewater |
| CN113415859A (en) * | 2021-06-30 | 2021-09-21 | 天津城建大学 | System for removing chlorophenol organic matters through electro-adsorption based on renewable activated carbon fibers |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100200495A1 (en) * | 2009-02-06 | 2010-08-12 | Ut-Battelle, Llc | Microbial fuel cell treatment of fuel process wastewater |
| CN102603039A (en) * | 2012-01-19 | 2012-07-25 | 清华大学 | Coupling desalination method and device |
-
2013
- 2013-06-08 CN CN2013102294664A patent/CN103265149A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100200495A1 (en) * | 2009-02-06 | 2010-08-12 | Ut-Battelle, Llc | Microbial fuel cell treatment of fuel process wastewater |
| CN102603039A (en) * | 2012-01-19 | 2012-07-25 | 清华大学 | Coupling desalination method and device |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103896371A (en) * | 2014-03-24 | 2014-07-02 | 浙江大学 | Electrochemical flocculation method and device capable of producing electricity |
| CN103896371B (en) * | 2014-03-24 | 2015-06-10 | 浙江大学 | Electrochemical flocculation method and device capable of producing electricity |
| CN103979688A (en) * | 2014-05-26 | 2014-08-13 | 东南大学 | Microbial fuel cell coupling electrode bio-membrane nitrogen and phosphorus removal system and application |
| CN103979688B (en) * | 2014-05-26 | 2015-07-29 | 东南大学 | A kind of microbiological fuel cell coupling electrode microbial film dephosphorization denitrogenation system and application |
| CN105330094A (en) * | 2015-09-06 | 2016-02-17 | 东南大学 | System for removing antibiotics in surface water through using root secretion reinforced wetland coupling system, and method thereof |
| CN105236686A (en) * | 2015-10-30 | 2016-01-13 | 东南大学 | Sewage treatment method for purifying refractory organic pollutants |
| CN106957120A (en) * | 2017-04-17 | 2017-07-18 | 中国石油大学(北京) | Oil-containing sewage treatment system |
| CN108339846A (en) * | 2018-01-18 | 2018-07-31 | 青岛科技大学 | Fuel cell handles the system and method that organic wastewater synchronizes repairing heavy metal in soil |
| CN111422956A (en) * | 2019-01-09 | 2020-07-17 | 中石化三菱化学聚碳酸酯（北京）有限公司 | Method for treating low-concentration phenol-containing wastewater |
| CN113415859A (en) * | 2021-06-30 | 2021-09-21 | 天津城建大学 | System for removing chlorophenol organic matters through electro-adsorption based on renewable activated carbon fibers |
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Application publication date: 20130828 |