CN102219328A - Photoelectric integrated reactor capable of deeply treating garbage leachate - Google Patents
Photoelectric integrated reactor capable of deeply treating garbage leachate Download PDFInfo
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- CN102219328A CN102219328A CN2010101484954A CN201010148495A CN102219328A CN 102219328 A CN102219328 A CN 102219328A CN 2010101484954 A CN2010101484954 A CN 2010101484954A CN 201010148495 A CN201010148495 A CN 201010148495A CN 102219328 A CN102219328 A CN 102219328A
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Abstract
The invention belongs to the field of water treatment, and provides a photoelectric integrated reactor capable of deeply treating garbage leachate. The reactor disclosed by the invention is a circular reaction tank. A water distribution plate is arranged at the lower part of the reactor so that inflow water is uniform. A titanium ruthenium net is adopted to serve as an electrode in a reaction region. An ultraviolet light source is supplied by a low-pressure mercury lamp. The reactor is led out from the upper side of the reaction region by a circuit for connecting the electrode with an ultraviolet lamp and connected with an external power supply. A water outlet through which water flows out is arranged on the side surface of the reactor. An exhaust hole is arranged at the upper part of the reactor. The exhaust hole is connected with a silicone tube and used for leading surplus chlorine generated in the reaction region out of the reactor. When the reactor operates, the electrode of the titanium ruthenium net is used for oxidizing high-concentration chloride ions in the leachate in the electrochemical oxidation process; a number of active chlorine can be generated in situ; hydroxyl radicals are generated through photolysis of the ultraviolet light; simultaneously, the active chlorine is subjected to photolysis to form chlorine radicals; and the garbage leachate can be treated effectively.
Description
Technical field
The invention belongs to water treatment field, particularly a kind of integrated reactor by electrochemistry and photodissociation technology synergy effect treating refuse percolate.This reactor generates a large amount of reactive chlorine by photoelectric-synergetic effect original position, and hydroxyl and chlorine radical with the direct anodizing of electrochemical process, are effectively removed Persistent organic pollutants in the percolate and ammonia nitrogen.
Background technology
Percolate is the liquid that is formed by endogenous water that produces after the garbage decomposition and extraneous water branch, be a kind of complicated component, high concentrated organic wastewater that variation water quality is bigger, contain a large amount of organic pollutants, ammonia nitrogen and some toxic substance, the processing of percolate is a difficult problem always.
At present, the treatment process to percolate mainly is the mode that biology-materialization combines.The working cost of biological treatment is relatively low, processing efficiency is high, but biological process for the landfill time long " old-age group " and the treatment effect of the relatively poor percolate of biodegradability bad; Materilization freatment method generally is not subjected to the influence of water quality and quantity, and effluent quality is more stable, and especially relatively poor to biodegradability, the percolate that is difficult to carry out a biological disposal upon has treatment effect preferably, and it is widely as the subsequent technique of biological process.Yet physico-chemical process is most just to be shifted pollutent, may produce secondary pollution, needs subsequent disposal to reach thorough degraded.
Oxidation style can make the structure of compound change, and the biodegradability of organism in the percolate of directly degrading or raising percolate is a kind of effectively method for the treatment of refuse percolate.Electrochemical oxidation technology is the electrochemical branch of environment, and the organic method of this removal is the electrooxidation technology and the combining of chemical oxidation technology, and comprises that Direct Electrochemistry transforms and the indirect electrochemical conversion.This technology is easy and simple to handle because of it, advantages of environment protection has caused investigator's extensive concern.It can directly or indirectly produce hydroxyl or chlorine radical by the electrode reaction that catalytic activity is arranged at normal temperatures and pressures, thus effective degradation of organic substances.
The photochemical oxidation method is a kind of rapidly high-level oxidation technologies of nearly 20 years development, and its reaction conditions gentleness, oxidation capacity are strong, applied widely, and utilizing this method to handle Persistent organic pollutants has become the domestic and international research focus.Photochemical oxidation is to produce the stronger free radical of oxidation capacity by oxygenant under the irradiation of light to carry out.
Photochemistry and electrochemical method being combined, continue to improve the degradation efficiency of pollutent, is a focus of nearest high-level oxidation technology research in the hope of the photoelectricity combination degradation technique that reaches synergistic effect.The photoelectricity combination technique is utilized the direct and indirect oxidation effect of electrochemistry self, and the photolysis of cooperative with ultraviolet radiation produces a large amount of reactive chlorine, hydroxyl and chlorine radical, can strengthen its cleaning action to water pollutant greatly.The present invention at the difficult degradation organic constituent in the percolate, organically combines electrochemical techniques and photo chemistry technology on this basis, develops a kind of novel photoelectric integrated reactor.Its principle is on the basis of electrochemical oxidation technology and photo chemistry technology, by synergy, produces a large amount of reactive chlorine, chlorine and hydroxyl radical free radical, removes pollutent effectively.
Summary of the invention
The present invention seeks at the difficult degradation component in the percolate photolysis that combined with electrochemical process and UV-light produce, and a kind of novel optoelectronic integration reactor of developing.Electrochemistry and photoprocess synergy change into lower material of toxicity or biological easily degradation material with pollutent, even inorganicization take place, and cut down the purpose of polluting thereby reach.
The present invention is an electrode with titanium ruthenium net, provides ultraviolet source by low pressure mercury lamp, has constituted a kind of novel optoelectronic integration reactor, and this reactor not only can degrade effectively organism and ammonia nitrogen in the percolate make this technology combine with traditional coagulant sedimentation; Can also improve the biodegradability of water outlet, provide feasibility for next step docks with biological process.The superfluous chlorine that produces in the reaction process can be used as oxygenant pending percolate is carried out pre-treatment, with preferential removal ammonia nitrogen, makes photoelectric reactor have better treatment effect.
The present invention realizes that the process that organism and ammonia nitrogen are removed simultaneously is summarized as follows:
Electrochemistry direct oxidation process: pollutent changes into lower material of toxicity or biological easily degradation material in the anode surface oxidation, even inorganicization takes place, and cuts down the purpose of polluting thereby reach:
Electrochemical indirect oxidation then is to have the intermediate material of strong oxidation or the intermediate reaction outside the generation anodic reaction by the anodic reaction generation, makes processed pollutant oxidation, finally is converted into innoxious substance:
Under the UV-light existence condition, HOCl is produced OH, Cl by direct photodissociation:
HOCl+hγ→·OH+·Cl
The photoelectric-synergetic effect produces reactive chlorine and the chlorine radical action principle to ammonia nitrogen:
The Cl that electrode surface discharges
2Micro-bubble also can quicken the carrying out of reaction, strengthens the place to go effect of pollutent.And play the effect of inside reactor mixing.
Optoelectronic integration reactor of the present invention is shown in synoptic diagram:
Water distribution board is arranged at the bottom in reactor.Above water distribution board by insulation spacer fixedly titanium ruthenium net electrode with the protection ultraviolet lamp silica tube.Be placed with stainless steel in the middle of the insulation spacer, play a part to connect and the stopping reaction district.Reactor bottom below water distribution board has water-in, evacuation port; Upper portion side wall at reactor has water outlet.Pole plate and ultraviolet lamp tube be wiring and sealing on liquid level, and lead is drawn outside the reactor.Sealing place has opening and links outside vapor pipe by silicone tube, and with the chlorine that produces, oxygen and hydrogen are discharged.(as shown in Figure 1)
Reactor of the present invention is an electrode with titanium ruthenium net.At reaction zone, titanium ruthenium net electrode is connected as positive and negative electrode with direct supply, and ultraviolet lamp is connected with direct supply as the collaborative electrochemical process degradation of organic substances of light source.Electrode is arranged with complex method, and positive/negative plate is all selected titanium ruthenium net for use.Three pole plate diameters are 360mm, 225mm, 75mm, connect the positive and negative, anodal of direct supply respectively.(as shown in Figure 2)
Placing diameter in two gaps between three pole plates is the long silica tube of 35mm, 950mm, in adorn 30 watts of ultraviolet lamps.Totally 14 of ultraviolet lamps, 9 of skins, 5 of internal layers are evenly arranged.(as shown in Figure 2)
Pole plate and ultraviolet lamp tube be wiring and sealing on liquid level, and lead is drawn outside the reactor.Sealing place has opening and links outside vapor pipe by silicone tube, with the chlorine that produces, and oxygen, hydrogen is discharged.
The operation method of optoelectronic integration reactor of the present invention is:
Adopt DC power supply, the inside and outside two groups of titanium ruthenium net electrodes of anodal connection, one group of titanium ruthenium net electrode in the middle of negative pole connects forms positive and negative, the positive combined electrode arrangement mode of ecto-entad.Open the reactor water intaking valve, intake pump, outlet valve, vent valve, the residence time of adjusting reactor is 2-4 hour; Open the power supply of reactor control pole plate and ultraviolet lamp.Under the photoelectric-synergetic effect, take place in the reactor electrochemical directly and the indirect oxidation process, and produce a large amount of hydroxyls and chlorine radical is handled percolate.Optoelectronic integration reactor of the present invention not only can be removed the Persistent organic pollutants in the chloride water body, also can remove effectively ammonia nitrogen.
Characteristics of the present invention:
1. by electrochemistry and photodissociation synergy, produce a large amount of reactive chlorine, hydroxyl and chlorine radical.Reactive chlorine, hydroxyl and chlorine radical acting in conjunction pollutent in water body make the pollutent removal of being degraded together with the anodic oxidation in the electrochemical process.
2. the present invention utilizes titanium ruthenium net electrode as positive and negative electrode, and ultraviolet lamp is as light source
3. the present invention removes the organic while in the waste water in optoelectronic integration, and removal effect preferably can be arranged the ammonia nitrogen in the water body.
4. reactor of the present invention can combine the advanced treatment percolate with traditional coagulant sedimentation;
5. reactor of the present invention can improve the biodegradability of percolate, and this reactor water outlet can also be carried out subsequent disposal with biochemical process.
6. reactor of the present invention produces a large amount of chlorine in operational process, superfluous chlorine can apply to the pre-treatment of percolate, to alleviate reactor load, improves treatment effect.
Embodiment
Embodiment 1:
Get the percolate of certain refuse landfill after anaerobism, aerobic treatment, the water quality situation: COD 1560mg L
-1, TOC 490mg L
-1, NH
4 +-N 100mg L
-1, pH 6.3, specific conductivity 22.74mS cm
-1, chlorine ion concentration 5000mg L
-1
Dominant discharge 30L/h, residence time 4h regulates current density 300A/m
2, operation continuously, the stable back of reactor COD clearance is 58%, the TOC clearance is 47%, NH
4 +-N clearance is 87%.Dominant discharge 40L/h, residence time 4h, the adjusting current density is 300A/m
2, operation continuously, the stable back of reactor COD clearance is 41%, the TOC clearance is 36%, NH
4 +-N clearance is 75%.
Embodiment 2:
Get the percolate of certain refuse landfill after anaerobism, aerobic membrane bioreactor are handled, water quality situation: COD 900mg L
-1, TOC 320mg L
-1, NH
4 +-N 190mg L
-1, pH 7.5, specific conductivity 17.34mS cm
-1, chlorine ion concentration 4300mg L
-1
Dominant discharge 30L/h, residence time 5h regulates current density 100A/m
2, operation continuously, the stable back of reactor COD clearance is 69%, the TOC clearance is 55%, NH
4 +-N clearance is 92%.Dominant discharge 40L/h, residence time 5h, the adjusting current density is 300A/m
2, operation continuously, the stable back of reactor COD clearance is 58%, the TOC clearance is 50%, NH
4 +-N clearance is 79%.
Embodiment 3:
Get the percolate of certain refuse landfill after anaerobism, aerobic treatment, the water quality situation: COD 2560mg L
-1, TOC 740mg L
-1, NH
4 +-N 350mg L
-1, pH 5.2, specific conductivity 24.55mS cm
-1, chlorine ion concentration 5600mg L
-1
Dominant discharge 30L/h, residence time 6h regulates current density 750A/m2, operation continuously, the stable back of reactor COD clearance is 62%, the TOC clearance is 57%, NH
4 +-N clearance is 84%.Dominant discharge 40L/h, residence time 6h, the adjusting current density is 300A/m
2, operation continuously, the stable back of reactor COD clearance is 47%, the TOC clearance is 42%, NH
4 +-N clearance is 73%.
Fig. 1 is an optoelectronic integration reactor synoptic diagram
Fig. 2 is electrode and the ultraviolet lamp synoptic diagram of arranging
Description of symbols in the accompanying drawing
1, venting port 2, vapor pipe 3, water outlet 4, stainless steel 5, reaction zone 6, water distribution board 7, water-in 8, fluorescent tube outlet 9, electrode 10, ultraviolet lamp tube 11, negative electrode 12, anode
Claims (7)
1. one kind is carried out the optoelectronic integration reactor of advanced treatment to percolate, and it is characterized in that: with titanium ruthenium net is the electrochemical process and the ultraviolet photolysis synergy of electrode, produces a large amount of reactive chlorine, hydroxyl and chlorine radical.Reactive chlorine, hydroxyl and chlorine radical acting in conjunction pollutent in water body make the pollutent removal of being degraded together with the anodic oxidation in the electrochemical process.
2. according to the described optoelectronic integration reactor of claim 1, it is characterized in that: titanium ruthenium net electrode is connected as positive and negative electrode with direct supply, and ultraviolet lamp is connected with direct supply as the collaborative electrochemical process degradation of organic substances of light source.
3. according to claim 1 and 2 described optoelectronic integration reactors, it is characterized in that: water distribution board is arranged in the bottom in reactor, makes water distribution even.Above water distribution board by insulation spacer fixedly titanium ruthenium net electrode with the protection ultraviolet lamp silica tube.Reactor bottom below water distribution board has water-in, evacuation port; Reaction zone upper portion side wall at reactor has water outlet.
4. according to claim 1,2 and 3 described optoelectronic integration reactors, it is characterized in that: pole plate and ultraviolet lamp tube be wiring and sealing on liquid level, and lead is drawn outside the reactor, joins with direct supply.Place stainless steel in the middle of the reaction zone, play connection, stopping reaction district bottom insulation spacer and top seal plate.There is opening at the sealing plate place and links outside vapor pipe by silicone tube, with the chlorine that produces, and oxygen, hydrogen is discharged and balanced reaction device internal pressure.
5. according to claim 1,2,3 and 4 described reactor and methods, it is characterized in that: electrode is arranged with complex method, and positive/negative plate is all selected titanium ruthenium net for use.Three pole plates connect the positive and negative, anodal of direct supply respectively.
6. according to claim 1,2,3,4 and 5 described reactor and configuration of electrodes, it is characterized in that: place 30 watts of ultraviolet lamps in two gaps between three pole plates.Ultraviolet lamp has 14: outer 9,5 of internal layers are evenly arranged.
7. according to the described reactor of claim 1～6, it is characterized in that: adopt DC power supply during the reactor operation, anodal inside and outside two groups of titanium ruthenium net electrodes, one group of titanium ruthenium net electrode in the middle of negative pole connects, positive and negative, the positive combined electrode arrangement mode of formation ecto-entad of connecting.Open the reactor water intaking valve, intake pump, outlet valve, vent valve, the residence time of adjusting reactor is 2-4 hour; Open the power supply of reactor control pole plate and ultraviolet lamp.Under the photoelectric-synergetic effect, reactor is removed effectively to hardly degraded organic substance in the percolate and ammonia nitrogen.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2515324A (en) * | 2013-06-19 | 2014-12-24 | Ramsey Yousif Haddad | Electrolytic advance oxidation processes to treat wastewater, brackish and saline water without hydrogen evolution |
| CN104843953A (en) * | 2015-06-08 | 2015-08-19 | 河南工业大学 | Method for deeply transforming perchlorate contained in water through synergistic effect of electrochemistry and biological hydrogen autotrophy and reactor |
| CN106277177A (en) * | 2016-10-25 | 2017-01-04 | 浙江富春江环保热电股份有限公司 | The device and method of plasma body cooperative photocatalysis treatment percolate |
| CN106745482A (en) * | 2016-12-27 | 2017-05-31 | 南昌大学 | A kind of photochemical oxidation reactor for percolate advanced treating |
| CN110759437A (en) * | 2019-10-12 | 2020-02-07 | 清华苏州环境创新研究院 | Method for electrochemical-UV composite treatment of refractory organic matters |
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| CN1477061A (en) * | 2002-08-21 | 2004-02-25 | 中科院生态环境研究中心 | Technique for photoelectrosynergistically and high-effectively purifying drinking water and its equipment |
| CN101113057A (en) * | 2006-07-27 | 2008-01-30 | 深圳市金达莱环保股份有限公司 | Combined technique for garbage filter liquor treatment |
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| CN1477061A (en) * | 2002-08-21 | 2004-02-25 | 中科院生态环境研究中心 | Technique for photoelectrosynergistically and high-effectively purifying drinking water and its equipment |
| CN101113057A (en) * | 2006-07-27 | 2008-01-30 | 深圳市金达莱环保股份有限公司 | Combined technique for garbage filter liquor treatment |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2515324A (en) * | 2013-06-19 | 2014-12-24 | Ramsey Yousif Haddad | Electrolytic advance oxidation processes to treat wastewater, brackish and saline water without hydrogen evolution |
| CN104843953A (en) * | 2015-06-08 | 2015-08-19 | 河南工业大学 | Method for deeply transforming perchlorate contained in water through synergistic effect of electrochemistry and biological hydrogen autotrophy and reactor |
| CN106277177A (en) * | 2016-10-25 | 2017-01-04 | 浙江富春江环保热电股份有限公司 | The device and method of plasma body cooperative photocatalysis treatment percolate |
| CN106745482A (en) * | 2016-12-27 | 2017-05-31 | 南昌大学 | A kind of photochemical oxidation reactor for percolate advanced treating |
| CN110759437A (en) * | 2019-10-12 | 2020-02-07 | 清华苏州环境创新研究院 | Method for electrochemical-UV composite treatment of refractory organic matters |
| CN110759437B (en) * | 2019-10-12 | 2022-02-01 | 清华苏州环境创新研究院 | Method for electrochemical-UV composite treatment of refractory organic matters |
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Application publication date: 20111019 |