CN104163479B - A kind of method adopting three-diemsnional electrode to remove nitrate nitrogen in water and device thereof - Google Patents
A kind of method adopting three-diemsnional electrode to remove nitrate nitrogen in water and device thereof Download PDFInfo
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Abstract
The present invention is a kind of adopts three-diemsnional electrode to remove the method for nitrate nitrogen in water, including one, waste water is inputted the step an electrolysis bath from waste water water dispensing apparatus, waste water is inputted in the step an electrolysis bath from waste water water dispensing apparatus, described electrolysis bath is provided with negative electrode, anode and granule electrode, described granule electrode is made up of activated carbon and foam metal copper, described activated carbon and foam metal copper are filled in described slot electrode, described slot electrode and a DC source connect, after opening power, by waste water is carried out electrolysis by slot electrode, waste water input waste water water dispensing apparatus after electrolysis is circulated, gas in waste water water dispensing apparatus is discharged by air-washer.Present invention also offers a kind of device realizing said method, the present invention utilizes activated carbon and the double; two filler mass transfer enhancement process of foam copper, utilizes electrochemical redox effect to remove nitrate nitrogen in water body on this basis, reduces the nitrate nitrogen harm to human body.
Description
Technical field
The invention belongs to chemical field, particularly relate to a kind of method for treating water and device thereof, specifically a kind of method adopting three-diemsnional electrode to remove nitrate nitrogen in water and device thereof.
Background technology
Day by day frequent along with mankind's activity, the drinking water source area in global range, as subsoil water, river, Lake Water and other surface water all receive serious nitrate-N pollution, wherein subsoil water is particularly acute.Human health will be produced harmful effect by the drinking water that long-term drink nitrate content exceeds standard.Nitrate is ingested after human body, nitrite it is reduced in the intestines and stomach, nitrite can directly in hemoglobin in blood rich in ferrous ions become ferric ion, reduce the oxygen carrying capacity of blood, thus causing various disease, such as methemoglobinemia, hepatic injury and cancer etc., resistance is more easy to get methemoglobinemia not as good as the baby of adult, is medically commonly called as " blue baby's disease ".In addition, agricultural runoff and municipal sewage plant's tail water often contain the nitrate of high concentration, these high concentration nitrogen-containing compounds are to the discharge in environment, exacerbate the eutrophication process in river, lake, cause water quality deterioration, biological living environment is constituted potential threat, such as bio-diversity minimizing, ecosystem degradation etc..Therefore, the nitrate controlled in water body is very necessary.
At present that nitrate-N pollution Study on treatment technology in water is more, mainly divide physics, chemical and biological three broad aspect.Physics denitrogenation includes membrane separation technique and ion exchange technique.The system operation cost such as membrane separation technique big, the film replacing of investment are high, and the dense salt wastewater treatment produced is more difficult；The regeneration efficiency of ion exchange technique is low, and regeneration is excessively frequent, also can produce a large amount of regeneration liquid waste.Chemistry denitrogenation includes Zero-valent Iron reduction denitrogenation and hydrogen catalytic reduction denitrogenation, and Zero-valent Iron reduction needs to add chemical substance, produces by-product, reduces actual denitration effect.Biological denitrificaion includes autotrophy and heterotrophic denitrification.The organic carbon source added in the denitrification process of biological denitrificaion has part and remains in water outlet, denitrifying bacterium can cause the microorganism of water outlet to pollute, produce excess sludge and poisonous and harmful substance, later stage processes more complicated, and water quality, temperature, pH etc. be there are certain requirements, winter, aqueous concentration was difficult to be guaranteed.Therefore, each method all has certain weak point in actual application, and the method developing new high-efficiency environment friendly process nitrate nitrogen waste water is imperative.
In recent years, electrochemical method is removed pollutant in water and is received much concern because of its environmental protection, has had abroad with electrochemical electrolysis reduction nitrate nitrogen and has studied widely.This technology carries out at normal temperatures and pressures, has the advantages such as capacity usage ratio is high, safe and environment-friendly, easy and simple to handle, it is believed that be one of the technology of most possible industrialization.The electrode material adopted during electrolysis has a variety of, and anode generally adopts inactive, conductive material, such as IrO2/ Ti, lead oxide, graphite etc.；Negative electrode generally adopts the monometallics such as palladium, platinum, silver, copper, gold, stannum, zinc, and the electrode after making can nitrate nitrogen in reductive water.But nitrate ion is with negative charge, being difficult in the electric field diffuse to cathode surface, what rely primarily on is random mass transfer, greatly reduces the reaction efficiency of electrolysis.
Summary of the invention
For above-mentioned technological deficiency of the prior art, the invention provides a kind of method adopting three-diemsnional electrode to remove nitrate nitrogen in water and device thereof, described this employing three-diemsnional electrode removes the method for nitrate nitrogen in water and device to solve and to adopt the inefficient technical problem of nitrate nitrogen in electrochemical electrolysis reductive water in prior art.
The present invention is a kind of adopts three-diemsnional electrode to remove the method for nitrate nitrogen in water, including one, waste water is inputted the step an electrolysis bath from waste water water dispensing apparatus, described, waste water is inputted in the step an electrolysis bath from waste water water dispensing apparatus, described electrolysis bath is provided with negative electrode, anode and granule electrode, described granule electrode is made up of activated carbon and foam metal copper, described activated carbon and foam metal copper are filled in described slot electrode, described slot electrode and a DC source connect, after opening power, by waste water is carried out electrolysis by slot electrode, waste water input waste water water dispensing apparatus after electrolysis is circulated, gas in waste water water dispensing apparatus is discharged by air-washer.
Further, described anode is Ti/RuO2, described negative electrode is copper, and described granule electrode is volume ratio is the 1:1 activated carbon filled and foam metal copper.
Present invention also offers and a kind of realize above-mentioned employing three-diemsnional electrode and remove the device of the method for nitrate nitrogen in water, including an electrolysis bath, DC source and a water storage water dispensing apparatus, described electrolysis bath and a DC source connect, described electrolysis bath is provided with a water inlet and an outlet, described water storage water dispensing apparatus is connected by first pipeline and a peristaltic pump, described peristaltic pump is connected by a second pipe and described water inlet, described outlet is connected by the 3rd pipeline and described water storage water dispensing apparatus, described water storage water dispensing apparatus is connected by the 4th pipeline and an air-washer, described electrolysis bath is provided with negative electrode, anode and granule electrode, the negative electrode of described electrolysis bath, the negative electrode of anode and described DC source, anode connects, described granule electrode is made up of activated carbon and foam metal copper, described activated carbon and foam metal copper are filled in described slot electrode.
Further, described anode is Ti/RuO2, described negative electrode is copper, and described granule electrode is volume ratio is the 1:1 activated carbon filled and foam metal copper.
Further, described foam metal copper aperture is 0.8-1.2mm, and described activated carbon particle size is 3-7mm, and packed height is 23cm.
Wherein, two pieces of plate dimensions of described electrolysis bath are 173mm × 42mm × 0.5mm, and polar plate spacing is 40mm.
Wherein, the electric current that described DC source provides is 0.1-10 peace, and voltage is 0.1-30 volt.
Further, described DC source is provided with electric current display screen.
Further, described peristaltic pump is provided with rotating speed display screen.
Further, in described electrolysis bath, described water inlet is in the lower end of electrolysis bath, and described outlet is in the upper end of electrolysis bath, and in so described electrolysis bath, the flow direction of water is up flow type so that can be full of whole electrolysis bath equably containing nitrate nitrogen waste water.
In the present invention, being connected by reverse-flow type between described water storage water distribution glass jar and described electrolysis bath, described waste water is promoted by described peristaltic pump, described bottom of electrolytic tank flow into, the waste water that electrolytic treatments is crossed is flowed out by described upper part of the electrolytic cell, is back in described water storage water distribution glass jar.
Further, described water storage water dispensing apparatus and an agitating device connect.
Concrete, described agitating device is a magnetic stirring apparatus, is provided with a magnetic stir bar in described water storage water dispensing apparatus.
Wherein, described water storage water distribution glass jar volume is 4L, and wherein placing one piece of diameter is 9mm, and length is the magnetic stir bar of 50mm, it is placed on described magnetic stirring apparatus, can fully mix the waste water processed in water and described water storage water distribution glass jar of backflow from described electrolysis bath.
Further, the first described pipeline connects a sampling pipe by threeway, described sampling pipe is provided with valve.
The work process of the present invention is: by the first pipeline and peristaltic pump, the waste water in water storage water dispensing apparatus is inputted electrolysis bath, utilize the three-dimensional electrode electrolysis waste water in electrolysis bath, waste water after electrolysis inputs in water storage water dispensing apparatus again, and the gas produced in water storage water dispensing apparatus is exported by Drexel bottle.
The principle of electrochemical reducing denitrogenation is from being exactly macroscopically, logical certain electric current in a cell, due to electrolysis, nitrate obtains electronics at negative electrode and granule electrode surface and is reduced generation low valent nitrogen substance such as ammonia nitrogen and nitrogen etc., thus being removed from former water.The ratedeterming step of this reaction is the mass transport process of nitrate ion, granule electrode has the pore structure of prosperity, add the specific surface area that reaction occurs, enhance the mass transfer ability of nitrate nitrogen, thus increasing nitrate nitrogen to be adsorbed to the probability of electrode surface concurrently raw reduction reaction, improve electrochemical reduction and removing the ability of nitrate nitrogen.Analyzing from microcosmic angle, in electrolytic vessel, nitrate nitrogen is reduced and is likely to generate the intermediate product such as nitrite and azanol.Shown in dominant response mechanism such as formula (1)-(5) of nitrate nitrogen degraded:
Cathode surface:
NO3 -+H2O+2e-→NO2 -+2OH-(1)
NO2 -+4H2O+4e-→NH2OH+5OH-(2)
NH2OH+H2O+2e-→NH3+2OH-(3)
NO2 -+5H2O+6e-→NH3+7OH-(4)
NO2 -+2H2O+3e-→(1/2)N2+4OH-(5)
It is demonstrated experimentally that when there is chloride ion in system, electrochemical reduction product ammonia nitrogen is innocuous gas nitrogen by active chlorine indirect oxidation, and in ie in solution, chloride ion is oxidized to Cl2, Cl2It is dissolved in water and generates HClO, ClO that oxidisability is extremely strong-, the ammonium oxidation produced in waste water is removed.Shown in dominant response mechanism such as formula (6)-(9):
Anode: 2Cl-→Cl2+2e-(6)
In solution: Cl2+H2O→HClO+H++Cl-(7)
HClO+(2/3)NH3→(1/3)N2+H2O+H++Cl-(8)
HClO+(2/3)NH4 +→(1/3)N2+H2O+(5/3)H++Cl-(9)
Electroreduction step is divided into mass transfer in liquid phase process, preposition conversion (absorption) etc., and nitrate ion is reduced at cathode surface.But it is difficult to be adsorbed in cathode surface as anion, what rely primarily on is random mass transfer, greatly reduces the reaction efficiency of electrolysis, and namely ratedeterming step is mass transfer in liquid phase.It was verified that foam metal copper then has the pore structure of prosperity, and there is certain hardness, it is possible to be filled in reactor as granule electrode, increase nitrate nitrogen mass transfer ability in the electric field, improve cell reaction efficiency.Activated carbon, as the second filler, can be avoided foam copper to move to anode under hydraulic action on the one hand and cause short circuit；Provide certain active redox site on the other hand, strengthen electrochemical action effect.
The three-diemsnional electrode that adopts of the present invention removes the method for nitrate nitrogen in water, utilizes electrochemical redox effect to remove nitrate nitrogen in water body, and can remove ammonia nitrogen under chloride ion existence condition on the basis of mass transfer enhancement.Experiment proves, chlorine ion concentration is 300mg/L, the water sample 8h of electrolysis 4L when Faradaic current is 2A, nitrate nitrogen can drop to 5.4mgN/L from 28mgN/L, reaches country's water quality standard for drinking water (GB5749-2006) requirement (surface water < 10mgN/L) for nitrate nitrogen.Continuing electrolysis to 18h, effluent nitrate-nitrogen lowering of concentration is to 0.8mgN/L.The removal process of this method nitrate nitrogen meets first-order kinetics, and when nitrate initial concentration is 30mgN/L and Faradaic current is 2A, its removal rate is 25.6mgN/h, faster than two-dimensional electrode under same condition 7 times.
The present invention utilizes activated carbon and the double; two filler mass transfer enhancement process of foam copper, utilizes electrochemical redox effect to remove nitrate nitrogen in water body on this basis, reduces the nitrate nitrogen harm to human body.Experiment proves, the present invention can remove nitrate nitrogen in water body by high-efficiency environment friendly, the loading of the copper of its foam metal is the half of total measurement (volume), after the water sample 18h of electrolysis 4L, nitrate nitrogen aqueous concentration is less than 1mgN/L, affected less by temperature and pH, it is easy to accomplish Automated condtrol, be the new method of a kind of high-efficiency environment friendly degree of depth removal nitrate nitrogen in water body.
The present invention proposes particle filled composite electrode mass transfer enhancement process in two dimension electrolysis reactor, to improve the nitrate electroreduction speed at negative electrode.Traditional three-diemsnional electrode adopts activated carbon as filler, but single-activity carbon filling material helps limited for electro-reduction process.Foam copper is a kind of Multifunction material being uniform-distribution with a large amount of connection or non-intercommunicating pore hole in Copper substrate.The electric conductivity of foam copper and ductility are good, can use it for preparation battery cathode (carrier) material, catalyst carrier and electromagnetic shielding material.Compared to common three-diemsnional electrode, foam metal not only adds the specific surface area of negative electrode and mass transfer enhancement ability, largely improves disposal ability.
The removal process of this method nitrate nitrogen meets first-order kinetics, and when nitrate initial concentration is 30mgN/L and Faradaic current is 2A, its removal rate is 25.6mgN/h, faster than two-dimensional electrode under same condition 7 times.Three-diemsnional electrode of the present invention passes through electrochemical reduction effect except the method for nitrate nitrogen on strengthening mass transfer basis, remove the purpose of nitrate nitrogen in water body with reaching high-efficiency environment friendly, and this method temperature influence is less, without barrier film, it is suitable for the pH value change of relative broad range, there is equipment simple, easy and simple to handle, feature that removal effect is good.
The present invention can remove nitrate nitrogen in water body nitrogen in degree of depth ground, ensures drinking water safety, reduces the harm that human body caused due to excess intake nitrate nitrogen, treatment effeciency height, environmental protection, is prone to Automated condtrol.
Accompanying drawing explanation
A kind of realization that Fig. 1 is invention adopts three-diemsnional electrode to remove the structural representation of the device of the method for nitrate nitrogen in water.
Fig. 2 is the structural representation that two-dimensional electrode removes nitrate nitrogen.
Detailed description of the invention
Adopt the method for nitrate nitrogen in three-diemsnional electrode removal water and device thereof to describe in further detail the present invention by the examples below and in conjunction with accompanying drawing, but be not limited to the present invention.
Nitrate nitrogen preparation waste water used by the present invention is by analytically pure NaNO3, NaCl and Na2SO4Being joined, pH value is by KH2PO4Regulating with NaOH, all reagent are buied by traditional Chinese medicines group.Actual waste water used by the present invention is precipitated the well water of 24h.
Embodiment 1
A kind of three-diemsnional electrode is adopted to remove the method for nitrate nitrogen in water, its process chart is as shown in Figure 1, waste water enters electrolysis bath 2 by the effect of peristaltic pump 3 from bottom, and electrolysis bath 2 is connected with DC source 1, the waste water in electrolysis bath 2 can be carried out electrolysis after opening power.In electrolysis bath 2, fill activated carbon 5 and foam copper 6 before experiment as granule electrode, ensure the efficiency of electrolysis with this.
Repeat said process, change nitrate nitrogen and chlorine ion concentration respectively, use actual waste water, investigate the three-diemsnional electrode removal effect to nitrate nitrogen.Using same apparatus, be not filled with granule electrode, its process chart is as in figure 2 it is shown, investigate the two-dimensional electrode removal effect to nitrate nitrogen under the same terms.
The three-diemsnional electrode that adopts realizing the present invention removes the device of the method for nitrate nitrogen in water, its schematic diagram is as it is shown in figure 1, include DC source 1, electrolysis bath 2, peristaltic pump 3, sample tap 4, activated carbon 5, foam metal copper 6, water-storing glass cylinder 7, magnetic stirring apparatus 8, Drexel bottle 9.Electrolysis bath 2 is filled with activated carbon 5 and foam metal copper 6.Water-storing glass cylinder 7 is placed on magnetic stirring apparatus 8.DC source 1 is connected by copper conductor with electrolysis bath 2, electrolysis bath 2, peristaltic pump 3, water-storing glass cylinder 7 are connected by teflon hose with Drexel bottle 9, nitrate nitrogen waste water pumps into electrolysis bath 2 from water-storing glass cylinder 7, it is back in the middle of water-storing glass cylinder 7, peristaltic pump 3 and electrolysis bath 2 after electrolytic treatments and is provided with sample tap 4 in order to each moment effluent nitrate-nitrogen concentration of sampling and measuring.
In the comparative example of the present invention, two-dimensional electrode electrolysis is except the device of nitrate nitrogen, and its schematic diagram is as in figure 2 it is shown, include DC source 11, electrolysis bath 22, peristaltic pump 33, sample tap 44, water-storing glass cylinder 55, magnetic stirring apparatus 66, Drexel bottle 77.Water-storing glass cylinder 55 is placed on magnetic stirring apparatus 66.DC source 11 is connected by copper conductor with electrolysis bath 22, electrolysis bath 22, peristaltic pump 33, water-storing glass cylinder 55 are connected by teflon hose with Drexel bottle 77, nitrate nitrogen waste water pumps into electrolysis bath 22 from water-storing glass cylinder 55, it is back in the middle of water-storing glass cylinder 55, peristaltic pump 33 and electrolysis bath 22 after electrolytic treatments and is provided with sample tap 44 in order to each moment effluent nitrate-nitrogen concentration of sampling and measuring.
Embodiment 2
A kind of method adopting two-dimensional electrode electrolysis to remove nitrate nitrogen, specifically includes the following step:
(1), the waste water 4L of preparation nitrate nitrogen and chlorine ion concentration respectively 28.0mgN/L, 300mg/L load in water-storing glass cylinder 55, add the KH of 27.2g2PO4It is about 7 that the NaOH solid of solid and 3.8g regulates water sample pH, utilizes Na2SO4Regulate electrical conductivity；
(2), device is connected by flow chart shown in Fig. 2, open magnetic stirring apparatus 66 and peristaltic pump 33, regulating peristaltic pump 33 is Peak Flow Rate 100rad/min, waste water is flowed in electrolysis bath 22 in time react, process water to be back in glass jar 55 from electrolysis bath 22 in time, and fully mix with waste water in cylinder；
(3), opening DC source 11, controlling its output electric current is 2.0A.Between sample from sample tap 4 at regular intervals, meanwhile measure the voltage between pole plate, question response completely after the pH of all samples, nitrate and total nitrogen concentration are measured.
Adopt national standard to analyze method the nitrate in electrolytic treatments water outlet is analyzed, after the water sample 18h of result display electrolysis 4L, nitrate nitrogen is down to 17.0mgN/L from 28.0mgN/L, and after process, water outlet is not up to country's water quality standard for drinking water (GB5749-2006) requirement (surface water < 10mgN/L) for nitrate nitrogen.In waste water, nitrate nitrogen clearance is 39.3%, and nitrate nitrogen is removed and met first _ order kinetics equation, and its speed is 3.7mgN/h.Adopting national standard to analyze method the total nitrogen concentration in electrolytic treatments water outlet is analyzed, in result display water outlet, total nitrogen concentration is 17.5mgN/L, and clearance is 37.5%.
Embodiment 3
A kind of adopt three-diemsnional electrode to remove the method for nitrate nitrogen in water, specifically include the following step:
(1), the waste water 4L of preparation nitrate nitrogen and chlorine ion concentration respectively 28.0mgN/L, 300mg/L load in water-storing glass cylinder 7, add the KH of 27.2g2PO4It is about 7 that the NaOH solid of solid and 3.8g regulates water sample pH, utilizes Na2SO4Regulate electrical conductivity；
(2), device is connected by flow chart shown in Fig. 1, opening magnetic stirring apparatus 8 and peristaltic pump 3, regulating peristaltic pump 3 is Peak Flow Rate 100rad/min so that waste water flows in time in electrolysis bath 2 and reacts, process water to be back in glass jar 7 from electrolysis bath 2 in time, and fully mix with waste water in cylinder；
(3), opening DC source 1, controlling its output electric current is 2.0A.Between sample from sample tap 4 at regular intervals, meanwhile measure the voltage between pole plate, question response completely after the pH of all samples, nitrate and total nitrogen concentration are measured.
Adopt national standard to analyze method the nitrate in electrolytic treatments water outlet is analyzed, after the water sample 18h of result display electrolysis 4L, nitrate nitrogen is down to 0.8mgN/L from 28.0mgN/L, and after process, water outlet reaches country's water quality standard for drinking water (GB5749-2006) requirement (surface water < 10mgN/L) for nitrate nitrogen.In 4L waste water, nitrate nitrogen clearance reaches 97.1%, and nitrate nitrogen is removed and met first _ order kinetics equation, and its speed is 23.0mgN/h, for 6.2 times of two-dimensional electrode.Adopting national standard to analyze method the total nitrogen concentration in electrolytic treatments water outlet is analyzed, in result display water outlet, total nitrogen concentration is 0.8mgN/L, and clearance is 97.1%.
Embodiment 4
(1), the waste water 4L of preparation nitrate nitrogen and chlorine ion concentration respectively 45.0mgN/L, 300mg/L load in water-storing glass cylinder 7, add the KH of 27.2g2PO4It is about 7 that the NaOH solid of solid and 3.8g regulates water sample pH, utilizes Na2SO4Regulate electrical conductivity；
(2), device is connected by flow chart shown in Fig. 1, opening magnetic stirring apparatus 8 and peristaltic pump 3, regulating peristaltic pump 3 is Peak Flow Rate 100rad/min so that waste water flows in time in electrolysis bath 2 and reacts, process water to be back in glass jar 7 from electrolysis bath 2 in time, and fully mix with waste water in cylinder；
(3), opening DC source 1, controlling its output electric current is 2.0A.Between sample from sample tap 4 at regular intervals, meanwhile measure the voltage between pole plate, question response completely after the pH of all samples, nitrate and total nitrogen concentration are measured.
Adopt national standard to analyze method the nitrate in electrolytic treatments water outlet is analyzed, after the water sample 18h of result display electrolysis 4L, nitrate nitrogen is down to 0.9mgN/L from 45.0mgN/L, and after process, water outlet reaches country's water quality standard for drinking water (GB5749-2006) requirement (surface water < 10mgN/L) for nitrate nitrogen.In 4L waste water, nitrate nitrogen clearance reaches 98.0%, and nitrate nitrogen is removed and met first _ order kinetics equation, and its speed is 41.6mgN/h.Adopting national standard to analyze method the total nitrogen concentration in electrolytic treatments water outlet is analyzed, in result display water outlet, total nitrogen concentration is 0.9mgN/L, and clearance is 98.0%.
Embodiment 5
(1), actual waste water be well water, after precipitation 24h, take 4L load in water-storing glass cylinder 7.In well water, nitrate nitrogen, chloride ion and ammonia nitrogen concentration respectively 20.0mgN/L, 100.0mg/L and 2.8mg/L, pH are 7.2.The electrical conductivity of actual waste water is regulated with sodium sulfate；
(2), device is connected by flow chart shown in Fig. 1, opening magnetic stirring apparatus 8 and peristaltic pump 3, regulating peristaltic pump 3 is Peak Flow Rate 100rad/min so that waste water flows in time in electrolysis bath 2 and reacts, process water to be back in glass jar 7 from electrolysis bath 2 in time, and fully mix with waste water in cylinder；
(3), opening DC source 1, controlling its output electric current is 2.0A.Between sample from sample tap 4 at regular intervals, meanwhile measure the voltage between pole plate, question response completely after the pH of all samples, nitrate and total nitrogen concentration are measured.
Adopt national standard to analyze method the nitrate in electrolytic treatments water outlet is analyzed, after the actual waste water 18h of result display electrolysis 4L, nitrate nitrogen is down to 1.2mgN/L from 20.0mgN/L, and after process, water outlet reaches country's water quality standard for drinking water (GB5749-2006) requirement (surface water < 10mgN/L) for nitrate nitrogen.In 4L waste water, nitrate nitrogen clearance reaches 94.2%, and nitrate nitrogen is removed and met first _ order kinetics equation, and its speed is 13.0mgN/h.Adopting national standard to analyze method the total nitrogen concentration in electrolytic treatments water outlet is analyzed, in result display water outlet, total nitrogen concentration is 1.7mgN/L, and clearance is 91.5%.
In sum, the present invention is a kind of method utilizing three-diemsnional electrode to remove nitrate nitrogen, waste water containing nitrate nitrogen is when entering electrolysis reactor, due to the pore structure that granule electrode is flourishing, add the specific surface area of reaction, enhance the mass transfer ability of nitrate nitrogen, largely increase nitrate nitrogen and be adsorbed to the probability of electrode surface concurrently raw reduction reaction, improve electrochemical reduction and remove the ability of nitrate nitrogen；On the other hand, there is Cl in the solution simultaneously-When can electrolysis produce Cl2, Cl2It is dissolved in water and produces HClO and ClO of strong oxidizing property further-, in both energy oxidation removal solution, the ammonia nitrogen of generation, discharges innocuous gas nitrogen.
The above is only the citing of embodiments of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the technology of the present invention principle; can also making some improvement and modification, these improve and modification also should be regarded as protection scope of the present invention.
Claims (8)
1. one kind adopts three-diemsnional electrode to remove the method for nitrate nitrogen in water, it is characterized in that: include one and waste water is inputted the step an electrolysis bath from waste water water dispensing apparatus, described, waste water is inputted in the step an electrolysis bath from waste water water dispensing apparatus, described electrolysis bath is provided with negative electrode, anode and granule electrode, described granule electrode is made up of activated carbon and foam metal copper, described activated carbon and foam metal copper are filled in described slot electrode, described foam copper is arranged on the side of negative electrode, described activated carbon is arranged on the side of anode, described slot electrode and a DC source connect, after opening power, by waste water is carried out electrolysis by slot electrode, waste water input waste water water dispensing apparatus after electrolysis is circulated, gas in waste water water dispensing apparatus is discharged by air-washer, described anode is Ti/RuO2, described negative electrode is copper, and described granule electrode is volume ratio is the 1:1 activated carbon filled and foam metal copper.
2. the three-diemsnional electrode that adopts realized described in claim 1 removes the device of the method for nitrate nitrogen in water, including an electrolysis bath, DC source and a water storage water dispensing apparatus, it is characterized in that: described electrolysis bath and a DC source connect, described electrolysis bath is provided with a water inlet and an outlet, described water storage water dispensing apparatus is connected by first pipeline and a peristaltic pump, described peristaltic pump is connected by a second pipe and described water inlet, described outlet is connected by the 3rd pipeline and described water storage water dispensing apparatus, described water storage water dispensing apparatus is connected by the 4th pipeline and an air-washer, described electrolysis bath is provided with negative electrode, anode and granule electrode, the negative electrode of described electrolysis bath, the negative electrode of anode and described DC source, anode connects, described granule electrode is made up of activated carbon and foam metal copper, described activated carbon and foam metal copper are filled in described slot electrode, described foam copper is arranged on the side of negative electrode, described activated carbon is arranged on the side of anode, described anode is Ti/RuO2, described negative electrode is copper, described granule electrode is volume ratio is the 1:1 activated carbon filled and foam metal copper.
3. device as claimed in claim 2, it is characterised in that: described foam metal copper aperture is 0.8-1.2mm, and described activated carbon particle size is 3-7mm.
4. device as claimed in claim 2, it is characterised in that: in described electrolysis bath, described water inlet is in the lower end of electrolysis bath, and described outlet is in the upper end of electrolysis bath.
5. device as claimed in claim 2, it is characterised in that: described water storage water dispensing apparatus and an agitating device connect.
6. device as claimed in claim 2, it is characterised in that: on the first described pipeline, connect a sampling pipe by threeway, described sampling pipe is provided with valve.
7. device as claimed in claim 2, it is characterised in that: described DC source is provided with electric current display screen.
8. device as claimed in claim 2, it is characterised in that: described peristaltic pump is provided with rotating speed display screen.
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| CN110894089A (en) * | 2019-09-24 | 2020-03-20 | 方明环保科技(漳州)有限公司 | Electric reduction device for reducing nitrogen content in water and electric reduction method thereof |
| CN110885151A (en) * | 2019-09-24 | 2020-03-17 | 方明环保科技(漳州)有限公司 | Waste water treatment device |
| CN111514712B (en) * | 2020-05-06 | 2021-10-01 | 青岛理工大学 | Novel method for denitration of flue gas by cooperation of anode and cathode electrocatalysis |
| CN111675288A (en) * | 2020-06-11 | 2020-09-18 | 大连民族大学 | Electrochemistry sewage treatment plant |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103193301A (en) * | 2013-04-27 | 2013-07-10 | 国电环境保护研究院 | Electrochemical reactor for processing nitrogenous organic wastewater, and application and processing method thereof |
| CN204022519U (en) * | 2014-08-25 | 2014-12-17 | 上海理工大学 | A kind of for the water treatment device except the nitric nitrogen that anhydrates |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103193301A (en) * | 2013-04-27 | 2013-07-10 | 国电环境保护研究院 | Electrochemical reactor for processing nitrogenous organic wastewater, and application and processing method thereof |
| CN204022519U (en) * | 2014-08-25 | 2014-12-17 | 上海理工大学 | A kind of for the water treatment device except the nitric nitrogen that anhydrates |
Non-Patent Citations (1)
| Title |
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| "三维电极电解法处理含铅废水";张少峰等;《工业水处理》;20120430;第32卷(第4期);第42-45页 * |
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