CN103613206A - Microorganism electrochemical denitrification method for enhancing bio-hydrogen production - Google Patents
Microorganism electrochemical denitrification method for enhancing bio-hydrogen production Download PDFInfo
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- CN103613206A CN103613206A CN201310646776.6A CN201310646776A CN103613206A CN 103613206 A CN103613206 A CN 103613206A CN 201310646776 A CN201310646776 A CN 201310646776A CN 103613206 A CN103613206 A CN 103613206A
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- denitrification
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Abstract
The invention discloses a microorganism electrochemical denitrification method for enhancing the bio-hydrogen production, which belongs to the field of environmental engineering and energy and chemical industry. The method is characterized in that a microorganism electrochemical system is used as a reactor, and denitrification microorganisms are added into a cathode to realize the nitrogen removal by denitrification of a biological cathode. Meanwhile, by adding the hydrogen-production microorganisms in the biological cathode, the BES (knowledge based expert system) denitrification capacity is further improved by utilizing the biological hydrogen production. The denitrification microorganisms can directly utilize the hydrogen generated by the hydrogen-production microorganisms in the biological cathode to carry out the denitrification effect; meanwhile, organic acid generated in the biological hydrogen production process can play a role in buffering pH, so that the BES denitrification rate can be further increased.
Description
Technical field
The microorganism electrochemical denitrogenation method that the present invention relates to a kind of bio-hydrogen strengthening, belongs to environmental engineering and derived energy chemical field.
Background technology
In recent years, nitrogen is as global water pollutant, and its removal is subject to increasing attention.Tradition denitrification process can be divided into physics, chemistry and biological three major types.Physical method denitrogenation mainly comprises ion-exchange, reverse osmosis and electrodialysis etc.Chemistry denitrogenation refers under alkalescence or condition of neutral pH, utilizes molysite or patina by the nitrate transformation ammonification in water.And traditional biological denitrification process principle is divided into three phases, comprise ammonification, nitrification and denitrification.Tradition denitrification process exists that occupation area of equipment is large, temperature influence is large, complicated operation, easily produce the shortcomings such as secondary pollution.And microorganism electrochemical system (BES) is as a kind of novel denitrification process, can be used for processing the nitrogen in polluted-water.BES can improve denitrifying bacterium directly in the activity of surperficial negative electrode, makes nitric nitrogen carry out denitrification process as electron acceptor(EA).It has the advantages such as energy consumption is low, easy to operate, integration is good, processing efficiency is high, sludge yield is low, receives increasing concern.
BES denitrification process is due to the restriction of anode electron production speed, and negative electrode denitrification rates is lower, and denitrification process can produce basicity simultaneously, causes catholyte pH to rise; And the hydrogen producing in anaerobic hydrogen production process not only can be used as reducing power promotion denitrification denitrogenation process, be accompanied by carbon source hydrolysis, acidization in substrate, the organic acids such as acetic acid, butyric acid, propionic acid, lactic acid can be produced, the basicity that denitrification produces can also be consumed.Therefore, the reducing power of the hydrogen providing in bio-hydrogen process, and under the dual function of the pH regulator ability that provides of organic acid, BES nitric efficiency is able to further raising.
Summary of the invention
The invention provides a kind of microorganism electrochemical denitrogenation method of bio-hydrogen strengthening, that to take microorganism electrochemical system (BES) be reactor, by adding, produce hydrogen microorganism in influent waste water, improve the denitrification rates of biological-cathode denitrifying bacterium, metabolism by hydrogen-producing bacteria is simultaneously produced acid and is consumed the basicity that denitrification produces, thereby maintains stablizing of pH value in BES biological-cathode.
Described microorganism electrochemical system response device comprises anode carbon brush 1, negative electrode carbon brush 2, reference electrode 3, cationic exchange membrane 4, rubber plug 5, external resistance 6, water inlet interface 7, water outlet mouthpiece 8 and fresh feed pump 9.By cationic exchange membrane 4, microorganism electrochemical system response device is divided into ，Ge Ji chamber, chamber, negative and positive the two poles of the earth volume and is 550mL; The anode chamber and the cathode chamber is all that (external diameter is 9cm to special synthetic glass reactor customized, interior through 7cm, be highly 14cm), carbon brush 1,2 forms by titanium silk and carbon fiber, top, anolyte compartment has water-in and rubber plug 5, and cathode compartment top drilling is used for placing reference electrode 3, and side bottom and top have into water interface 7 and water outlet mouthpiece 8, anode and cathode and reference electrode form external circuit by wire, and centre is connected with the resistance of 100 Ω.
Described denitrogenation method comprises the following steps:
(1) starter gear domestication anode: it is the electrogenesis nutritive medium of 550mL and the anaerobic sludge supernatant liquor of taming through electrogenesis nutritive medium that cumulative volume is housed in anolyte compartment, wherein the volume ratio of electrogenesis nutritive medium and anaerobic sludge supernatant liquor (containing electrogenesis microorganism) is 3:1, when be stabilized in-0.5V of anode potential, anode is tamed successfully.
The OD of described anaerobic sludge supernatant liquor
600=0.021-0.025.
The formula of described electrogenesis nutritive medium (mg/L): KCl0.13, NH
4cl0.31, NaH
2pO
42.7, Na
2hPO
411.55, anhydrous sodium acetate 1.0, micro-1mL/mL, VITAMIN liquid 1mL/mL; Trace element formula (g/L): nitrilotriacetic acid(NTA) 1.5, MgSO
47H
2o3.0, MnSO
4h
2o0.5, NaCl1.0, FeSO
47H
2o0.1, CoCl0.1, CaCl
20.1, ZnSO
47H
2o0.1, CuSO
45H
2o0.01, potassium aluminium alum 0.01, H
3bO
50.01, Na
2moO
40.01; VITAMIN liquid formula (mg/L): vitamin H 2.0, Lin Suanna Vitamin B2 Sodium Phosphate .0, pyridoxine hydrochloride 10.0, vitamins B
15.0, vitamins B
25.0, nicotinic acid 5.0, D-acid calcium 5.0, vitamins B
120.1, para-amino benzoic acid 5.0, Thioctic Acid 5.0.
(2) start biological-cathode denitrogenation: after anode potential is stable, to negative electrode, add the denitrification nutritive medium that cumulative volume is 550mL and the anaerobic sludge supernatant liquor of taming through denitrification nutritive medium (containing denitrifying microorganism), wherein the volume ratio of denitrification nutritive medium and anaerobic sludge supernatant liquor is 3:1, when be stabilized in-0.24V of cathode potential left and right, be denitrification effect stable.
Described anaerobic sludge supernatant liquor (containing denitrifying microorganism) OD
600=0.010-0.015.
The formula of described denitrification nutritive medium (mg/L): KNO
31.0, NaCl0.5, NaHCO
32.0, KH
2pO
44.4, K
2hPO
43.4, MgSO
40.2, CaCl
20.015.
(3), after denitrification effect is stablized, in negative electrode water inlet, inoculate the anaerobic sludge supernatant liquor through 120 ℃ of high-temperature sterilizations (producing hydrogen microorganism is spore state) the conduct product hydrogen microorganism species accounting for into water cumulative volume 25%, wherein anaerobic sludge supernatant liquor OD
600=0.013-0.018.
The hydrogen that strengthening product hydrogen mainly directly utilizes brine electrolysis to generate at present improves the denitrification effect of BES.First the present invention utilizes denitrifying bacterium to realize biological-cathode denitrogenation at negative electrode, and then in negative electrode, adds product hydrogen microorganism, by bio-hydrogen and the further negative electrode of product acid, improves the denitrification rates of denitrifying bacterium.The present invention is as a kind of microorganism electrochemical denitrification treatment process of bio-hydrogen strengthening, biological-cathode can utilize the hydrogen that Chan Qing Institute of Micro-biology produces to improve denitrification rates, the organic acid of simultaneous hydrogen production microorganisms can maintain the stable of system pH, has further improved rate of reduction and the nitric efficiency of denitrifying bacterium.
Accompanying drawing explanation
Fig. 1 is indication microorganism electrochemical denitrification treatment process apparatus structure schematic diagram of the present invention.
Fig. 2 is the impacts of different training methods on BES denitrification effect; 1, anode carbon brush; 2, negative electrode carbon brush; 3, reference electrode; 4, cationic exchange membrane; 5, rubber plug; 6, external resistance; 7, water inlet interface; 8, water outlet mouthpiece; 9, fresh feed pump; V1, open circuit voltage; V2, cathode potential; * denitrification rates equation: y=-kx+y
0; K is degradation rate constant, y
0for nitric nitrogen starting point concentration; * A: add simultaneously and produce hydrogen microorganism and denitrification microorganism; B: only add denitrification microorganism; C: abiotic negative electrode.
Embodiment
Embodiment 1 utilizes the mud of Wuxi north of the city sewage work to carry out the microorganism electrochemical denitrogenation of bio-hydrogen strengthening
1,2 be described as follows by reference to the accompanying drawings:
As shown in Figure 1, the present invention is usingd microorganism electrochemical system as reactor, and this reactor consists of cathode and anode chamber, and centre separates by cationic exchange membrane.Anode is by water-in (5) water inlet, and negative electrode utilizes peristaltic pump to pass through water-in (7) water inlet, and sampling is by water outlet (8), and electrogenesis and denitrification microorganism are attached to respectively on carbon brush (1) (2).
First, the electrogenesis nutritive medium that to inoculate into cumulative volume in anolyte compartment be 550mL and through the anaerobic sludge supernatant liquor of electrogenesis nutritive medium domestication, wherein the volume ratio of electrogenesis nutritive medium and anaerobic sludge supernatant liquor (containing electrogenesis microorganism) is 3:1, and anaerobic sludge is taken from Wuxi north of the city sewage work.Wherein electrogenesis microorganism supernatant liquor absorbancy under 600nm wavelength, between 0.021-0.025, starts device of the present invention at ambient temperature.Behind be stabilized in-0.5V of anode potential left and right, continuation is added the denitrification nutritive medium that cumulative volume is 550mL and the anaerobic sludge supernatant liquor of taming through denitrification nutritive medium (containing denitrifying microorganism) in cathode compartment, anaerobic sludge is taken from Wuxi north of the city sewage work, wherein denitrification supernatant liquor (containing the anaerobic sludge supernatant liquor of denitrifying microorganism) under 600nm wavelength absorbancy between 0.010-0.015; When maintain-0.24V of cathode potential left and right, be biological-cathode denitrogenation reach stable after, then, in water inlet, add the anaerobic sludge supernatant liquor (mud is taken from Wuxi north of the city sewage work) containing product hydrogen microorganism accounting for into water cumulative volume 25%, wherein produce the absorbancy of hydrogen microorganism supernatant liquor under 600nm wavelength between 0.013-0.018.As shown in Figure 2, except add denitrification microorganism and produce the experimental group (A) of hydrogen microorganism simultaneously, be also provided with the abiotic cathode sets (C) of only adding denitrification microorganism group (B) and not adding microorganism.Operation through 32 days, from each experimental group nitric nitrogen, removing speed can find out, the denitrification effect of biological-cathode has obvious lifting with respect to abiotic negative electrode, wherein the denitrification rates constant k of experimental group A is 2.729, the denitrification rates constant k of experimental group B is 2.330, but not biological-cathode group is only 1.236.This is due to the interpolation of microorganism, to have improved the transfer rate of electronics, and then promotes reduction reaction; Meanwhile, add and produce after hydrogen microorganism, denitrification denitrogenation bacterium can utilize hydrogen to carry out reduction reaction, and organic acid can also maintain the stable of system pH, and the nitric efficiency that therefore adds the BES that produces hydrogen microorganism is able to obvious raising.
Embodiment 2 utilizes the mud of Condar Feng County, Xuzhou sewage work to carry out the microorganism electrochemical denitrogenation of bio-hydrogen strengthening
In embodiment 2, embodiment is similar to embodiment 1, and the anaerobic sludge of different is electrogenesis microorganism, denitrifying microorganism and product hydrogen microorganism is all taken from Condar Feng County, Xuzhou sewage work.Except add denitrification microorganism and produce the experimental group of hydrogen microorganism simultaneously, be also provided with the abiotic cathode sets of only adding denitrification microorganism group and not adding microorganism.Through the operation of 32 days, the denitrification effect of biological-cathode had obvious lifting with respect to abiotic negative electrode, and result is similar with embodiment 1, at this, did not make extra chart.
In sum, the present invention, by bio-hydrogen enhancement microbiological electrochemistry denitrification treatment process, can produce the promoter action of hydrogen microorganism to denitrification microorganism in realization response device, maintains the stable of system, and then improves nitric efficiency.
Although the present invention with preferred embodiment openly as above; but it is not in order to limit the present invention, any person skilled in the art, without departing from the spirit and scope of the present invention; all can do various changes and modification, so protection scope of the present invention should be with being as the criterion that claims were defined.
Claims (8)
1. the microorganism electrochemical denitrogenation method of bio-hydrogen strengthening, to take microorganism electrochemical system as reactor, by adding containing the anaerobic sludge supernatant liquor that produces hydrogen microorganism in sewage water inlet, improve the denitrification rates of biological-cathode denitrifying bacterium, maintain stablizing of pH value in reactor negative electrode simultaneously.
2. method according to claim 1, it is characterized in that, described microorganism electrochemical system response device comprises anode carbon brush (1), negative electrode carbon brush (2), reference electrode (3), cationic exchange membrane (4), rubber plug (5), external resistance (6), water inlet interface (7), water outlet mouthpiece (8) and fresh feed pump (9), by cationic exchange membrane (4), microorganism electrochemical system response device is divided into chamber, yin, yang the two poles of the earth.
3. method according to claim 2, it is characterized in that, described cathode compartment top drilling is used for placing reference electrode (3), side bottom and top have into water interface (7) and water outlet mouthpiece (8), anode and cathode and reference electrode form external circuit by wire, between be connected with the resistance of 100 Ω.
4. according to the arbitrary described method of claim 1-3, it is characterized in that, concrete steps are: (1) starter gear domestication anode: it is the electrogenesis nutritive medium of 550mL and the anaerobic sludge supernatant liquor that contains electrogenesis microorganism that cumulative volume is housed in anolyte compartment, wherein the volume ratio of electrogenesis nutritive medium and anaerobic sludge supernatant liquor is 3:1, when be stabilized in-0.5V of anode potential, anode domestication finishes; (2) start biological-cathode denitrogenation: after anode potential is stable, to negative electrode, add denitrification nutritive medium that cumulative volume is 550mL and containing the anaerobic sludge supernatant liquor of denitrifying microorganism, wherein the volume ratio of denitrification nutritive medium and anaerobic sludge supernatant liquor is 3:1, when be stabilized in-0.24V of cathode potential, be denitrification effect stable; (3), after denitrification effect is stablized, in negative electrode water inlet, inoculate the anaerobic sludge supernatant liquor containing product hydrogen microbial spore through high-temperature sterilization accounting for into water cumulative volume 25%.
5. method according to claim 4, is characterized in that, the described anaerobic sludge supernatant liquor containing electrogenesis microorganism is the anaerobic sludge supernatant liquor through the domestication of electrogenesis nutritive medium.
6. method according to claim 4, is characterized in that, the described anaerobic sludge supernatant liquor containing denitrifying microorganism is the anaerobic sludge supernatant liquor through the domestication of denitrification nutritive medium.
7. method according to claim 4, is characterized in that, described electrogenesis nutritive medium: KCl0.13mg/L, NH
4cl0.31mg/L, NaH
2pO
42.7mg/L, Na
2hPO
411.55mg/L, anhydrous sodium acetate 1.0mg/L, micro-1mL/mL, VITAMIN liquid 1mL/mL.
8. method according to claim 4, is characterized in that, described denitrification nutritive medium: KNO
31.0mg/L, NaCl0.5mg/L, NaHCO
32.0mg/L, KH
2pO
44.4mg/L, K
2hPO
43.4mg/L, MgSO
40.2mg/L, CaCl
20.015mg/L.
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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 |
| CN104843862A (en) * | 2014-12-31 | 2015-08-19 | 广东省微生物研究所 | Process for intensifying anaerobic degradation and transformation of azo dyes based on breath of microbial electrode |
| CN107935130A (en) * | 2017-12-16 | 2018-04-20 | 傲自然成都生物科技有限公司 | A kind of electro-chemical systems and purification method for purifying drinking water |
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| CN109081508A (en) * | 2018-08-27 | 2018-12-25 | 四川大学 | A kind of biological hydrogen production coupling denitrification realizes the sewage water treatment method of simultaneous hydrogen production and denitrogenation |
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Cited By (11)
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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 |
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| CN107935130A (en) * | 2017-12-16 | 2018-04-20 | 傲自然成都生物科技有限公司 | A kind of electro-chemical systems and purification method for purifying drinking water |
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| CN109081508A (en) * | 2018-08-27 | 2018-12-25 | 四川大学 | A kind of biological hydrogen production coupling denitrification realizes the sewage water treatment method of simultaneous hydrogen production and denitrogenation |
| CN109160596A (en) * | 2018-10-16 | 2019-01-08 | 中国石油化工股份有限公司 | A kind of quick start method of the bioelectrochemistry technique for oil field waste deoxygenation |
| CN109160596B (en) * | 2018-10-16 | 2021-07-27 | 中国石油化工股份有限公司 | Quick starting method of bioelectrochemical process for deoxidizing oil field wastewater |
| CN114162974A (en) * | 2021-12-03 | 2022-03-11 | 哈尔滨工业大学（深圳） | Weak current intervention constructed wetland system for efficiently degrading parachloronitrobenzene and operation method |
| CN115974288A (en) * | 2022-12-30 | 2023-04-18 | 山东大学 | Method for reinforcing dissimilatory reduction process of nitrate into ammonium by electric field coupling magnetic field |
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Application publication date: 20140305 Assignee: JINGJIANG HUASHENG HEAVY METAL PREVENTION AND CONTROL CO.,LTD. Assignor: Jiangnan University Contract record no.: 2017320000035 Denomination of invention: Microorganism electrochemical denitrification method for enhancing bio-hydrogen production Granted publication date: 20150415 License type: Exclusive License Record date: 20170306 |
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