CN103641271A - Microorganism reinforced gallery pushing flow type wastewater treatment bioelectrochemical device - Google Patents
Microorganism reinforced gallery pushing flow type wastewater treatment bioelectrochemical device Download PDFInfo
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Abstract
The invention discloses a microorganism reinforced gallery pushing flow type wastewater treatment bioelectrochemical device which relates to a sewage treatment device. The invention solves the problem that the cost of BESs (bioelectrochemical systems) is increased due to weakened anode activity and high membrane cost by adopting an ion exchange membrane in the existing sewage treatment BESs. The microorganism reinforced gallery pushing flow type wastewater treatment bioelectrochemical device comprises a water inlet tank, a water inlet pump, a sewage treatment pond and a water outlet, wherein the sewage treatment pond comprises a first electrode treatment unit and a settling pond; the first electrode treatment unit comprises a first electrode treatment unit cathode chamber, a first cathode electrode, a first clapboard, a first electrode treatment unit anode chamber and a first anode electrode; the first cathode electrode is positioned in the first electrode treatment unit cathode chamber, the first anode electrode is positioned in the first electrode treatment unit anode chamber, the first cathode electrode is connected with one end of an external resistor, the other end of the external resistor is connected with a cathode of the external power supply, and the first anode electrode is connected with an anode of the external power supply; the settling pond is a settling chamber. The microorganism reinforced gallery pushing flow type wastewater treatment bioelectrochemical device is applied to the field of sewage treatment.
Description
Technical field
What the present invention relates to is a kind of waste disposal plant.
Background technology
In society, the high speed development of industry all increases severely the quantity discharged of water loss in industrial enterprise's production process and waste water with day now, most trade effluents all belong to typical poisonous organic wastewater with difficult degradation thereby, in these waste water, conventionally contain high-concentration biochemical Persistent organic pollutants, its intractability is large, serious to environment water harm.Aggravation along with the pollution situation of ecotope; the mankind are for the enhancing of environmental consciousness; to the attention of water crisis and to the Toxic understanding of enrichment in vivo; thereby more and more stricter to being discharged into the restriction of the toxic substance in water body; adopt traditional biology and physico-chemical purification method to process and cannot meet technology and economic requirement now; therefore develop efficiently, refractory organic treatment technology cheaply, be current environmentalist's research emphasis.
Bioelectrochemistry system (Bioelectrochemical system:BES) is considered to a kind of novel potential technology that reclaims electric current, fuel and chemical substance from waste water now.Different electro-chemical systems, normally used electrode is different, conventionally in bioelectrochemistry system take carbon as basic electrode, graphite granule for example, carbon fiber, carbon cloth, carbon felt, carbon paper, graphite cake etc.So not only can avoid the consumption of electrode in electrochemistry to produce chemical sludge, and reduce electrode cost.The more important thing is, in bioelectrochemistry system, biological-cathode and biological anode that the electrochemical activity microorganism of take is electrocatalysis amboceptor compare in electrochemical reaction, reduced the overpotential of electrode reaction, make reactive system approach thermodynamic(al)equilibrium, and make to improve for the processing efficiency of target substance.With traditional biological process comparison, bioelectrochemistry system more easily obtains stable material clearance on the other hand.Anolyte compartment/cathode compartment bioelectrochemistry reaction can be directly in oxidizing reaction or the reduction reaction of electrode surface generation substrate, and higher than the efficiency of single biochemical reaction.In circulation circuit, on negative electrode, electronics and proton are reacted consumption on the one hand, and microorganism utilizes substrate metabolism constantly to generate more electronics and proton.On electrode surface, growth has a large amount of microorganisms to can be used as electron acceptor(EA) or be electron donor at anode bacteria metabolism at negative electrode on the other hand.
In recent years, the research of BESs aspect sewage disposal is quite concerned, and has obtained a lot of achievements.The organism of anode in can oxidized waste water, for example, glucose, Mierocrystalline cellulose and chitin particle etc.; In recent years, cathodic process has caused people's very big interest, and electronic reduction reaction can occur to obtain negative electrode, at negative electrode, hazardous and noxious substances can be reduced to the material that toxicological harmless or toxicity are little, for example, and nitrate, halogenide, dyestuff, oil of mirbane, heavy metal etc.Wherein a lot of difficult degradation pollutents, as dyestuff, chlorophenols, nitryl aromatic hydro carbons show stronger reduction effect at negative electrode, therefore, utilize BESs negative electrode to remove difficult degradation pollutent and have great potentiality.But now, BES reactor mostly is bipolar chamber structure, wherein the existence of ion-exchange membrane can cause the pH value graded at negative and positive the two poles of the earth, makes anode acidifying, affects anode active; And can greatly increase the cost of BESs, thereby limit the popularization of bioelectrochemistry system.
Summary of the invention
The object of the invention is in order to solve the problem of existing sewage disposal bioelectrochemistry system and device because adopting the high BESs of the making cost of ion-exchange membrane anode reduced activity and film cost to increase., and a kind of microbial augmentation type gallery pulling flow type wastewater treatment bioelectrochemistry device is provided.
A microbial augmentation type gallery pulling flow type wastewater treatment bioelectrochemistry device, this device is comprised of inlet chest, intake pump, treatment tank and water outlet;
Described treatment tank comprises the first electrode processing unit and settling tank;
The first described electrode processing unit is comprised of the first electrode processing unit cathode compartment, the first cathode electrode, the first dividing plate (3-1), the first electrode processing unit anolyte compartment and first anode electrode, the first cathode electrode is arranged in the first electrode processing unit cathode compartment, first anode electrode is arranged in the first electrode processing unit anolyte compartment, the first cathode electrode is connected with one end of outer meeting resistance, the other end of outer meeting resistance is connected with the negative pole of external source, and first anode electrode is connected with the positive pole of external source; The first described cathode electrode is connected in series and is formed by titanium silk by the first cathode electrode and the first cathode electrode;
Described settling tank is settling chamber, and settling chamber and the first electrode processing unit anolyte compartment are separated by second partition;
The water-in of the first described electrode processing unit cathode compartment bottom is communicated with the exit end of intake pump, and the inlet end of intake pump is communicated with inlet flume, and the side wall upper part of described settling chamber is communicated with water outlet.
Principle of work: the principle of work of a kind of microbial augmentation type of the present invention gallery pulling flow type wastewater treatment bioelectrochemistry device: the waste water in inlet chest enters treatment tank under the effect of intake pump, waste water is under the anaerobic environment condition for the treatment of tank, adopt waste water pulling flow type method, the waste water first electrode processing unit cathode compartment of first flowing through, hazardous and noxious substances in waste water is in cathode electrode surface generation reduction reaction, generate low toxicity or avirulent product, flow into again the first electrode processing unit anolyte compartment, substrate in waste water is in anode generation oxidizing reaction, under the effect of pulling flow type, waste water passes through anaerobism settling tank again, after anaerobion carries out microbiological treatment, the sewage being cleaned reaches water outlet.
Beneficial effect of the present invention:
A kind of microbial augmentation type of the present invention gallery pulling flow type wastewater treatment bioelectrochemistry device adopts without membrane structure, and selects cheap graphite granule or carbon fiber brush as electrode materials, greatly reduces cost.The design concept of pulling flow type makes pollutent fully in cathodic reduction, to have reduced pollutent antianode, produce poisoning effect and restraining effect, and the accumulation of balance anode proton effectively simultaneously, prevents the pH graded at negative and positive the two poles of the earth.
A kind of microbial augmentation type of the present invention gallery pulling flow type wastewater treatment bioelectrochemistry device negative electrode in processing the process of waste water has been brought into play the effect of decolouring, detoxification; anode in oxidation substrates for negative electrode provides electronics; compare with conventional ion exchange membrane; the efficiency of processing waste water of the present invention improves 20%～25%; cost 20%～30%, has the advantage that the extension of being easy to and mass-producing are applied.
Accompanying drawing explanation
Fig. 1 is the vertical view of a kind of microbial augmentation type gallery pulling flow type wastewater treatment bioelectrochemistry device of embodiment one;
Fig. 2 is the side-view from A direction of a kind of microbial augmentation type gallery pulling flow type wastewater treatment bioelectrochemistry device of embodiment one;
Fig. 3 for test one in the different water conservancy residence time, the influent load of sodium p-nitrobenzene-azo-salicylate and decolorizing efficiency impact effect figure,
the influent load that represents sodium p-nitrobenzene-azo-salicylate,
the decolorization rate that represents sodium p-nitrobenzene-azo-salicylate;
Fig. 4 tests one in the different water conservancy residence time, the impact effect figure of anodic-cathodic electromotive force and current density,
the electrode potential that represents negative electrode,
the electrode potential that represents anode,
represent current density.
Embodiment
Embodiment one: in conjunction with Fig. 1, a kind of microbial augmentation type gallery pulling flow type wastewater treatment bioelectrochemistry device in present embodiment, this device is comprised of inlet chest (1), intake pump (2), treatment tank and water outlet (8);
Described treatment tank comprises the first electrode processing unit and settling tank;
The first described electrode processing unit is by the first electrode processing unit cathode compartment (4-1), the first cathode electrode, the first dividing plate (3-1), the first electrode processing unit anolyte compartment (4-2) and first anode electrode (7) form, the first cathode electrode is arranged in the first electrode processing unit cathode compartment (4-1), first anode electrode (7) is arranged in the first electrode processing unit anolyte compartment (4-2), the first cathode electrode is connected with the one end of outer meeting resistance (11), the other end of outer meeting resistance (11) is connected with the negative pole of external source (9), first anode electrode (7) is connected with the positive pole of external source (9), wherein, the first described cathode electrode is connected in series and is formed by titanium silk by the first cathode electrode (6) and the first cathode electrode (12),
Described settling tank is settling chamber (4-3), and settling chamber (4-3) and the first electrode processing unit anolyte compartment (4-2) are separated by second partition (3-2);
The water-in (5) of the first described electrode processing unit cathode compartment (4-1) bottom is communicated with the exit end of intake pump (2), the inlet end of intake pump (2) is communicated with inlet flume (1), and the sidewall of described settling chamber (10) top is communicated with water outlet (8).
Embodiment two: the difference of present embodiment and embodiment one is, described treatment tank is airtight rectangular parallelepiped; Wherein, the length of described rectangular parallelepiped: wide: high ratio is (4～10): 1:1.Other is identical with embodiment one.
Embodiment three: present embodiment and embodiment one or twos' difference is, the first described electrode processing unit cathode compartment (4-1), the first electrode processing unit anolyte compartment (4-1) and settling chamber (4-3) are shaped as rectangular parallelepiped, wherein each corner of rectangular parallelepiped is arc transition, the dead angle of prevention current.Other is identical with embodiment one or two.
Embodiment four: the difference of one of present embodiment and embodiment one to three is, the electrode materials of described the first cathode electrode (6), the first cathode electrode (12) and first anode electrode (7) is for loading titanium basket or the carbon brush of graphite granule; Wherein, described carbon brush is comprised of carbon fiber and titanium silk.Other is identical with one of embodiment one to three.
Embodiment five: the difference of one of present embodiment and embodiment one to four is, the water intake velocity of described intake pump (2) is 1.20 * 10
-3m
3/ d～1.30 * 10
-3m
3/ d.Other is identical with one of embodiment one to four.
Embodiment six: the difference of one of present embodiment and embodiment one to five is, described external resistor is 20 Ω.Other is identical with one of embodiment one to five.
Embodiment seven: the difference of one of present embodiment and embodiment one to six is, described treatment tank is airtight rectangular parallelepiped; Wherein, the length of described rectangular parallelepiped: wide: high ratio is 5:1:1.Other is identical with one of embodiment one to six.
Embodiment eight: the difference of one of present embodiment and embodiment one to seven is, described a kind of microbial augmentation type gallery pulling flow type wastewater treatment bioelectrochemistry device can arrange (2n+1) individual gallery; Wherein, the number that arranges of described electrode processing unit is n.Other is identical with one of embodiment one to seven.
Embodiment nine: the difference of one of present embodiment and embodiment one to eight is, the material of described treatment tank housing, the first dividing plate (3-1) and second partition (3-2) is synthetic glass.Other is identical with one of embodiment one to seven.
Adopt following verification experimental verification effect of the present invention:
Test one: in conjunction with Fig. 1, a kind of microbial augmentation type gallery pulling flow type wastewater treatment bioelectrochemistry device in present embodiment, this device is comprised of inlet chest (1), intake pump (2), treatment tank and water outlet (8);
Described treatment tank comprises the first electrode processing unit and settling tank;
The first described electrode processing unit is by the first electrode processing unit cathode compartment (4-1), the first cathode electrode, the first dividing plate (3-1), the first electrode processing unit anolyte compartment (4-2) and first anode electrode (7) form, the first cathode electrode is arranged in the first electrode processing unit cathode compartment (4-1), first anode electrode (7) is arranged in the first electrode processing unit anolyte compartment (4-2), the first cathode electrode is connected with the one end of outer meeting resistance (11), the other end of outer meeting resistance (11) is connected with the negative pole of external source (9), first anode electrode (7) is connected with the positive pole of external source (9), wherein, the first described cathode electrode is connected in series and is formed by titanium silk by the first cathode electrode (6) and the first cathode electrode (12),
Described settling tank is settling chamber (4-3), and settling chamber (4-3) and the first electrode processing unit anolyte compartment (4-2) are separated by second partition (3-2);
The water-in (5) of the first described electrode processing unit cathode compartment (4-1) bottom is communicated with the exit end of intake pump (2), the inlet end of intake pump (2) is communicated with inlet flume (1), and the sidewall of described settling chamber (10) top is communicated with water outlet (8).
The first described cathode electrode of this test is comprised of two titanium baskets that load graphite granule, and described first anode single electrode is a titanium basket that loads graphite granule; Wherein, the first described cathode electrode group and the unipolar volume ratio of the first anode are 2:1.
Fig. 4 is the device schematic diagram of a kind of microbial augmentation type gallery pulling flow type wastewater treatment bioelectrochemistry device of test one employing.
Simulated wastewater: to be every 1L waste water be comprised of phosphate buffer solution (pH=7), KCl0.13g, NH4Cl0.31g, NaAc1g, VITAMIN liquid 1mL, mineral element liquid 1mL, dyestuff sodium p-nitrobenzene-azo-salicylate 0.1g and the tap water of 25mL described simulated wastewater; Wherein, in described every 1L VITAMIN liquid, contain vitamin H 2.0mg; Lin Suanna Vitamin B2 Sodium Phosphate .0mg; Pyridoxine hydrochloride 10.0mg; Vitamin B15 .0mg; Lin Suanna Vitamin B2 Sodium Phosphate 5.0mg; Nicotinic acid 5.0mg; D-VB5 calcium 5.0mg; Vitamin B12 0.1mg; Para-amino benzoic acid 5.0mg; Thioctic Acid 5.0mg; In described every 1L mineral element liquid, contain nitrilotriacetic acid 1.5g; Magnesium sulfate heptahydrate 3.0g; Manganese sulfate monohydrate 0.5g; Sodium-chlor 1.0g; Iron vitriol 0.1g; Cobaltous chloride 0.1g; Calcium chloride 0.1g; Zinc Sulphate Heptahydrate 0.1g; Cupric sulfate pentahydrate 0.01g; Potassium aluminium alum 0.01g; H
3bO
30.01g; Sodium orthomolybdate 0.01g.
Utilize said apparatus treatment of simulated waste water, method is as follows: the waste water in inlet chest 1 enters treatment tank under the effect of intake pump 2, waste water is under the anaerobic environment condition for the treatment of tank, adopt waste water pulling flow type method, the waste water first electrode processing unit cathode compartment 4-1 that first flows through, hazardous and noxious substances in waste water is in the first cathode electrode surface generation reduction reaction, generate low toxicity or avirulent product, flow into again the first electrode processing unit anolyte compartment, substrate in waste water is in first anode electrode generation oxidizing reaction, under the effect of pulling flow type, waste water passes through anaerobism settling tank again, after anaerobion carries out microbiological treatment, the sewage being cleaned reaches water outlet.
This test is to be 0.5V at impressed voltage, and external resistor is 20 Ω, and water inlet speed is 1.25 * 10
-3m
3continuous Flow water inlet under the condition of/d.
The anaerobic environment of the treatment tank that this test is described is in the forward direction device that brings into operation, to fill the nitrogen 30 minutes of exposing to the sun there is no oxygen in assurance device.
This test-results is as follows:
1, this tests the percent of decolourization of a kind of microbial augmentation type gallery pulling flow type wastewater treatment bioelectrochemistry device to sodium p-nitrobenzene-azo-salicylate
As shown in Figure 4, when sodium p-nitrobenzene-azo-salicylate influent load is 106.23gAYR/m
3during TVd, its percent of decolourization can reach more than 95%, and this shows that this device can be to the azo dyes processing of decolouring.And work as sodium p-nitrobenzene-azo-salicylate influent load, bring up to 637.40gAYR/m
3during TVd, the decolorizing effect of sodium p-nitrobenzene-azo-salicylate is reduced to 50%, and the concentration of the sodium p-nitrobenzene-azo-salicylate detecting in water outlet approaches 50mg/L, and this shows that the influent load of sodium p-nitrobenzene-azo-salicylate has surpassed one group of maximum load that electrode group can bear in this device.
Effluent adopting high performance liquid chromatography to device detects, result shows, the main reduzate of sodium p-nitrobenzene-azo-salicylate is Ursol D and 5-aminosalicylic acid, and its product is easier to aerobic biodegradation, because the fracture of azo bond, thereby realized the decolouring of azoic dyestuff.Therefore, this invention effectively azo dyes waste water realizes the object of decolouring, and water outlet is also easier to follow-up aerobic treatment.
2, this tests the load of sodium p-nitrobenzene-azo-salicylate in a kind of microbial augmentation type gallery pulling flow type wastewater treatment bioelectrochemistry device for the impact of electrode potential
By reference to the accompanying drawings 3 and accompanying drawing 4, when sodium p-nitrobenzene-azo-salicylate influent load is brought up to 318.69gAYR/m by 106.23
3in the process of TVd, remain on-400mV of first anode single-electrode potential vs SCE(saturated calomel reference electrode), more than, corresponding, cathode potential stabilization is in-850mV vsSCE left and right (accompanying drawing 4), current density is linear growth with water inlet oil of mirbane load, from 14.83, brings up to 20.39A/m
3tCV (TCV: negative electrode cumulative volume), when water inlet oil of mirbane load is brought up to 637.40gAYR/m
3during TVd, first anode single electrode and the first rise to respectively-250mV of cathode electrode group current potential and-750mV, current density is reduced to 12.34A/m
3tCV, this shows when water inlet sodium p-nitrobenzene-azo-salicylate load surpasses the processing power of the first electrode treatment group cathode compartment, in the water outlet of the first cathode compartment, contain more sodium p-nitrobenzene-azo-salicylate, when first anode single electrode is flowed through in this part water outlet, microorganism active on antianode produces and suppresses or toxic action, cause anode potential to rise, first anode single electrode has been lost biological activity gradually.Therefore, in test, guarantee that it is the key point that keeps first electrode treatment group anolyte compartment's biological activity and device steady running that the first electrode treatment group cathode compartment has higher Pollutant Treatment load.According to this point, in order to make first anode single electrode keep normal active, can to electrode group, carry out different arranging according to the load of sodium p-nitrobenzene-azo-salicylate in water inlet, or add multi-group electrode, thereby improve the processing efficiency of sodium p-nitrobenzene-azo-salicylate.
As can be seen from the above results, the electrochemical reducting reaction that this device occurs by the first cathode electrode group is to contain readily biodegradable and the little amino benzene analog waste water of toxicity in conjunction with the combined action of the bioelectrochemistry anode of the first electrode treatment group anolyte compartment by the wastewater treatment that contains azoic dyestuff.In this process, negative electrode has been brought into play the effect of decolouring, detoxification, anode when oxidation substrates for negative electrode provides electronics, the device of this proof test has that waste water treatment efficiency improves 25%, cost 20%, be easy to the advantage of extension and mass-producing application.
Claims (6)
1. a microbial augmentation type gallery pulling flow type wastewater treatment bioelectrochemistry device, is characterized in that microbial augmentation type wastewater treatment gallery pulling flow type bioelectrochemistry device is comprised of inlet chest (1), intake pump (2), treatment tank and water outlet (8);
Described treatment tank comprises the first electrode processing unit and settling tank;
The first described electrode processing unit is by the first electrode processing unit cathode compartment (4-1), the first cathode electrode, the first dividing plate (3-1), the first electrode processing unit anolyte compartment (4-2) and first anode electrode (7) form, the first cathode electrode is arranged in the first electrode processing unit cathode compartment (4-1), first anode electrode (7) is arranged in the first electrode processing unit anolyte compartment (4-2), the first cathode electrode is connected with the one end of outer meeting resistance (11), the other end of outer meeting resistance (11) is connected with the negative pole of external source (9), first anode electrode (7) is connected with the positive pole of external source (9), the first described cathode electrode is connected in series and is formed by titanium silk by the first cathode electrode (6) and the first cathode electrode (12),
Described settling tank is settling chamber (4-3), and settling chamber (4-3) and the first electrode processing unit anolyte compartment (4-2) are separated by second partition (3-2);
The water-in (5) of the first described electrode processing unit cathode compartment (4-1) bottom is communicated with the exit end of intake pump (2), the inlet end of intake pump (2) is communicated with inlet flume (1), and the sidewall of described settling chamber (10) top is communicated with water outlet (8).
2. a kind of microbial augmentation type gallery pulling flow type wastewater treatment bioelectrochemistry device according to claim 1, is characterized in that described treatment tank is airtight rectangular parallelepiped; Wherein, the length of described rectangular parallelepiped: wide: high ratio is (4～10): 1:1.
3. a kind of microbial augmentation type gallery pulling flow type wastewater treatment bioelectrochemistry device according to claim 1, the rectangular parallelepiped that is shaped as that it is characterized in that the first described electrode treatment group cathode compartment (4-1), the first electrode treatment group anolyte compartment (4-1) and settling chamber (4-3), wherein each corner of rectangular parallelepiped is arc transition.
4. a kind of microbial augmentation type gallery pulling flow type wastewater treatment bioelectrochemistry device according to claim 1, is characterized in that the electrode materials of described the first cathode electrode (6), the first cathode electrode (12) and first anode electrode (7) is for loading titanium basket or the carbon brush of graphite granule; Wherein, described carbon brush is comprised of carbon fiber and titanium silk.
5. a kind of microbial augmentation type gallery pulling flow type wastewater treatment bioelectrochemistry device according to claim 1, is characterized in that the water intake velocity of described intake pump (2) is 1.20 * 10
-3m
3/ d～1.30 * 10
-3m
3/ d.
6. a kind of microbial augmentation type gallery pulling flow type wastewater treatment bioelectrochemistry device according to claim 1, is characterized in that described external resistor is 20 Ω.
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| CN104310713A (en) * | 2014-11-03 | 2015-01-28 | 哈尔滨工业大学 | Difficult-to-degrade waste water treatment device reinforced by up-flow type anaerobic and biocatalysis electrolysis coupling |
| CN105304914A (en) * | 2015-11-10 | 2016-02-03 | 华东理工大学 | Power extraction method and device in high-concentration heavy-metal wastewater treatment process |
| CN108017249A (en) * | 2018-01-08 | 2018-05-11 | 哈尔滨工业大学 | A kind of plug flow reactor and its regulation and control method using cow dung production biogas |
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| CN103641271B (en) | 2016-02-17 |
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