CN104609649A - Method and device for treating wastewater containing high-concentration phenol - Google Patents
Method and device for treating wastewater containing high-concentration phenol Download PDFInfo
- Publication number
- CN104609649A CN104609649A CN201510001110.4A CN201510001110A CN104609649A CN 104609649 A CN104609649 A CN 104609649A CN 201510001110 A CN201510001110 A CN 201510001110A CN 104609649 A CN104609649 A CN 104609649A
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- phenol
- dielectric barrier
- barrier discharge
- plasma reactor
- discharge plasma
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Abstract
The invention discloses a method and device for treating wastewater containing high-concentration phenol. A dielectric barrier discharge plasma treatment method combined with biological treatment is adopted. After the wastewater containing high-concentration phenol is collected, the wastewater is treated with a dielectric barrier discharge plasma reactor, the treated wastewater enters a biological treatment device to be treated, and finally the obtained water is discharged into a river. In the dielectric barrier discharge plasma reactor, .OH, .O, H2O2, O3, high-energy electrons and ultraviolet light, which are generated during high voltage discharge, have strong oxidizing substances, so that the concentration of phenol in wastewater is reduced; meanwhile, phenol is partly oxidized to generate low-carbon aldehyde, alcohol, acid and ester compounds which are easy for biodegradation. Entering the biological treatment device, the aldehyde, alcohol, acid and ester compounds and the phenol which is not treated are further converted into CO2, H2O and other inorganic substances under the microbial action. The method can effectively remove the high-concentration phenol in wastewater, and the removal rate is higher than 99 percent.
Description
Technical field
The present invention relates to a kind for the treatment of process containing high concentration phenol waste water and device, be specifically related to a kind of dielectric barrier discharge plasma and be combined the method and device thereof that process high concentration phenol waste water with biophase, belong to the technical field of environmental pollution treatment.
Background technology
Along with industrial expansion, a large amount of trade effluents produces and discharge, brings huge pressure to environment protection.And health that the is ecological and mankind in the phenolic waste water serious harm being extensively present in the chemical industries such as coking, petrochemical industry, pharmacy, papermaking, resin, plastics.
At present, main methods comprises physico-chemical process, chemical method, biochemical process three major types.Absorption method in physico-chemical process is widely used in the process of phenolic wastewater, and it mainly utilizes porous solid material as sorbent material, the advantages such as gac, diatomite, activated alumina, exchange resin, the method efficiency is high, easy to operate, non-secondary pollution.Weak point is that loading capacity is limited, needs through manipulation of regeneration.
Oxidation style in chemical method in waste water, adds oxygenant, as Cl
2, ClO
2, O
3, H
2o
2, KMnO
4deng, oxidation of phenol is decomposed.But chemical oxidizing agent resource is few, cost is high, be therefore generally used for the process of lower concentration phenolic wastewater.
And biochemical process has the advantages such as less investment, working cost be low, effective due to it, is application method main at present.Weak point is that the phenol of high density has toxic action to microorganism, can suppress microbial growth, even cause the death of microorganism.Meanwhile, the degradation rate of most of microbe Pyrogentisinic Acid is less than the degraded to compounds such as low-carbon (LC) aldehyde, alcohol, acid and ester classes significantly.
Plasma discharging teclmiques is the high-level oxidation technology of the advantages such as having of growing up in recent decades capacity usage ratio is high, non-secondary pollution.Dielectric barrier discharge plasma produces a large amount of OH, O, H by electric discharge under the effect of extra electric field
2o
2, O
3and the oxidizing substance such as high-energy electron, UV-light, the physical-chemical reaction of these materials and phenol generation series of complex, makes phenol that oxidizing reaction can occur and generates the organism of easily degrading.But the solution after Cement Composite Treated by Plasma, owing to still can not directly discharge containing a large amount of organism.
Summary of the invention
The present invention aims to provide a kind for the treatment of process containing high concentration phenol waste water and device, is combined by dielectric barrier discharge plasma with biological degradation, process high concentration phenol waste water, industrially significant.
The present invention proposes on the basis of the relative merits fully analyzing plasma technique and biologic treating technique.Whole treating processes comprises dielectric barrier discharge plasma process and biological treatment two steps, realizes respectively in dielectric barrier discharge plasma reactor and biological treatment reactor.
The invention provides a kind for the treatment of process containing high concentration phenol waste water, its technological process is:
(1) first the waste water containing high concentration phenol enter dielectric barrier discharge plasma reactor, in dielectric barrier discharge plasma reactor, discharged by high-voltage power supply, produces OH, O, O
3, H
2o
2and high-energy electron, UV-light have the material of strong oxidizing property, these materials and phenol react, and generate the alcohol, aldehyde, the Halogenated-hydrocarbons that are easily biodegradable;
(2) liquid of discharging from dielectric barrier discharge plasma reactor enters Buffer Pool, makes the unreacted O completely generated in dielectric barrier discharge plasma reactor
3and H
2o
2reaction decomposes is complete, avoids entering biological treatment reactor and produces toxic action to microorganism;
(3) then entering biological processor through the solution of Buffer Pool, under the effect of a large amount of aerobic microbiological, is CO by contained alcohol, aldehyde, Halogenated-hydrocarbons and not oxidized phenol conversion
2, H
2o and other inorganics.
Method provided by the present invention can under investment and the relatively low prerequisite of working cost, and realize effective removal of Coal Gas Washing Cycling Water phenol, clearance reaches more than 99%.
To combine with biological degradation the method processed containing high concentration phenol waste water to realize above-mentioned dielectric barrier discharge plasma, the invention provides a kind of device, this device mainly comprises dielectric barrier discharge plasma reactor and biological treatment reactor, also comprise wastewater collection pond, Buffer Pool, hydraulic pipe and pump, dielectric barrier discharge plasma reactor inlet end connects wastewater collection pond and steel gas cylinder, exit end Connection Pool entrance and collecting tank circulation fluid entrance, dielectric barrier discharge plasma reactor outlet end is also provided with blow-down pipe; Buffer Pool outlet is connected with biological treatment reactor.
Described dielectric barrier discharge plasma reactor comprises reactor body and high-voltage power supply two portions: reactor body is by the reaction vessel of the insulated shell of band cavity, its shape is board-like, usually cylinder and prism is made into, to increase its intensity, be close to lower wall on insulated shell and discharge electrode and earthing pole are set.Be provided with water-in and water outlet in the middle of two ends, described insulated shell sidewall left and right, and be provided with inlet mouth and air outlet in top portion, insulated shell sidewall rear and front end.Also comprise source of the gas part, described source of the gas part is connected with inlet mouth by gas piping, and described high-voltage power supply part is connected with the discharge electrode of upper and lower twice and earthing pole by high-voltage conducting wires.Upper and lower two plates of described insulated shell are dielectric impedance, and material is quartz, pottery or glass.Described source of the gas part is O
2, Ar, N
2or the mixture between them, described source of the gas is provided by gas bomb and be provided with reducing valve, under meter successively on gas piping.Described power supply uses Gao Zhongying nanometer high voltage pulse source, or high-frequency high-voltage source, or pulsed high-frequency high-voltage power supply.Between discharge electrode and earthing pole, provide high pressure to produce plasma body by high-voltage power supply, under the effect of plasma body, produce OH, O, H
2o
2, O
3and high-energy electron, UV-light have the material of strong oxidizing property.These materials and phenol react and generate easy biodegradable alcohol, aldehyde, Halogenated-hydrocarbons.
Described biological treatment reactor is oxygen activity sludge treatment device or MBR membrane bioreactor as well: in aerobic activated sludge treater, microorganism grows in aeration tank, namely microorganism and additional nutrition thereof coexist in aeration tank, after the phenol solution after Cement Composite Treated by Plasma enters aeration tank by Buffer Pool, alcohol in solution, aldehyde, Halogenated-hydrocarbons and unreacted phenol, under the effect of aerobic microbiological, can be converted into CO
2, H
2o and other inorganics.Mixed solution after activated sludge purification enters secondary sedimentation basins, and the active sludge suspended in mixed solution is separated with water with other solid matter sedimentation, and the sewage after process discharges system, and the mud of precipitation concentration is through being back to aeration tank.MBR membrane bioreactor is the new type water treatment technology that a kind of high performance membrane isolation technique combines with activated sludge process, utilizes the efficient crown_interception of film, effectively catching microbial bacterial in reaction tank, makes microbial bacterial effectively can remove organic pollutant.
The high-concentration waste water of the difficult degradation that the present invention is directed to refers to the phenolic waste water containing difficult for biological degradation, and the high waste water to the toxic effect of microorganism of concentration, derive from the chemical industries such as coking, petrochemical industry, pharmacy, papermaking, resin, plastics.Can oxidizing species be produced in described plasma reactor, comprise OH, O, H
2o
2, O
3and high-energy electron, UV-light, can there is incomplete oxidation in phenol, be converted into the organic compound of easily degraded under described action of plasma.Microorganism in described biological treatment reactor refers under aerobic conditions, relies on phenol contained in waste water, existence and the hydrocarbon polymer of generation, additional nutrition composition and water and the microorganism that grows, multiply.
Of the present invention
beneficial effect:
Adopt dielectric barrier discharge plasma reactor by high density, be reduced to certain level to the phenol concentration of the toxic effect of microorganism, biological processor can be entered into and can not produce toxic action to microorganism; Be the organic compound be easily degraded by microorganisms by phenol degrading, these apparatus and method are particularly suitable for the process containing high concentration phenol waste water simultaneously.
Accompanying drawing explanation
Fig. 1 is the treatment unit schematic diagram that the present invention contains high concentration phenol waste water.
In figure, 1 is source of pollution, and 2 is pump, and 3 is collecting tank, and 4 is dielectric barrier discharge plasma reactor, and 5 is power supply, and 6 is steel gas cylinder, and 7 is reducing valve, and 8 is under meter, and 9 is Buffer Pool, and 10 is biological treatment reactor.
Embodiment
Further illustrate the present invention below by embodiment, but be not limited to following examples.
Embodiment:
The links such as method provided by the invention relates to wastewater collection, waste water conveying, wastewater treatment and waste water are arranged outward.Its concrete treatment step is as follows:
1) dielectric barrier discharge plasma treatment process
According to the situation of source of pollution 1, enter collecting tank 3 after being collected by pump 2 by the waste water containing high concentration phenol of discharging, then enter dielectric barrier discharge plasma reactor 4, the gas in steel gas cylinder 6 can be O
2, Ar, N
2or the mixture between them is by entering dielectric barrier discharge plasma reactor 4 after reducing valve 7 and under meter 8, under the high pressure that high-voltage power supply 5 provides, produces electric discharge, produce a large amount of OH, O, H
2o
2, O
3and high-energy electron, UV-light have the material of strong oxidizing property, these materials and part phenol react and make it be oxidized to be easy to biodegradable alcohol, aldehyde, Halogenated-hydrocarbons.Waste water after plasma reactor process enters Buffer Pool 9, makes the unreacted O completely generated in dielectric barrier discharge plasma reactor 4
3and H
2o
2reaction decomposes is complete, avoids entering biological treatment reactor and produces toxic action to microorganism.
2) biological treatment process
Directly enter biological treatment reactor 10 from Buffer Pool 9 waste water out, under the effect of supporting microorganism well, make to be easy to the alcohol of microbiological deterioration, aldehyde, Halogenated-hydrocarbons be degraded to CO
2, H
2o and other inorganics.Meanwhile, under the effect of microorganism, also CO is not degraded to by the phenol of plasma oxidation
2, H
2o and other inorganics.Waste water after purifying treatment discharges system.
The method processing high density wastewater containing phenol is combined with biophase in order to realize above-mentioned dielectric barrier discharge plasma, present invention also offers a kind of corresponding device, as shown in Figure 1, mainly comprise dielectric barrier discharge plasma reactor 4, biological treatment reactor 10, also comprise wastewater collection pond 3, Buffer Pool 9, hydraulic pipe and pump, dielectric barrier discharge plasma reactor 4 inlet end connects wastewater collection pond 3 and steel gas cylinder 6, exit end Connection Pool 9 entrance and collecting tank 3 circulation fluid entrance, dielectric barrier discharge plasma reactor 4 exit end is also provided with blow-down pipe, Buffer Pool 9 outlet is connected with biological treatment reactor 10.
If the excessive concentration of waste water phenol from dielectric barrier discharge plasma reactor 4 out, still to the toxic effect of microorganism, then waste water does not enter Buffer Pool 9, but waste water is directly squeezed into collecting tank 3 by pump through collecting tank 3 circulation fluid entrance, dielectric barrier discharge plasma reactor 4 is entered again, until do not produce toxic action from the phenol concentration dielectric barrier discharge plasma reactor 4 waste water out to the microorganism in biological treatment reactor 10 after mixing.
Source of pollution 1, collecting tank 3, dielectric barrier discharge plasma reactor 4, to be linked together by hydraulic pipe between Buffer Pool 9 and biological treatment reactor 10.
Dielectric barrier discharge plasma reactor 4 upper and lower plates is dielectric impedance, and material is quartz, pottery or glass.
Power supply 5 is Gao Zhongying nanometer high voltage pulse source, or high-frequency high-voltage source, or pulsed high-frequency high-voltage power supply.
The electrode of dielectric barrier discharge plasma reactor 4 is divided into discharge electrode and ground-electrode, and material is conducting material.
Power supply 5 is connected by high-voltage conducting wires with discharge electrode and ground-electrode.
Claims (4)
1., containing a treatment process for high concentration phenol waste water, it is characterized in that, comprise the following steps:
(1) first the waste water containing high concentration phenol enter dielectric barrier discharge plasma reactor, in dielectric barrier discharge plasma reactor, discharged by high-voltage power supply, produces OH, O, O
3, H
2o
2and high-energy electron, UV-light have the material of strong oxidizing property, these materials and phenol react, and generate and are easy to biodegradable alcohol, aldehyde, Halogenated-hydrocarbons;
(2) liquid of discharging from dielectric barrier discharge plasma reactor enters Buffer Pool, makes the unreacted O completely generated in dielectric barrier discharge plasma reactor
3and H
2o
2reaction decomposes is complete, avoids entering biological treatment reactor and produces toxic action to microorganism;
(3) then entering biological processor through the solution of Buffer Pool, under the effect of a large amount of aerobic microbiological, is CO by contained alcohol, aldehyde, Halogenated-hydrocarbons and not oxidized phenol conversion
2, H
2o and other inorganics.
2. the treatment unit containing high concentration phenol waste water, it is characterized in that: comprise dielectric barrier discharge plasma reactor, biological treatment reactor, wastewater collection pond, Buffer Pool, hydraulic pipe and pump, dielectric barrier discharge plasma reactor inlet end connects wastewater collection pond and steel gas cylinder, exit end Connection Pool entrance and collecting tank circulation fluid entrance, dielectric barrier discharge plasma reactor outlet end is also provided with blow-down pipe; Buffer Pool outlet is connected with biological treatment reactor.
3. the treatment unit containing high concentration phenol waste water according to claim 2, it is characterized in that: described plasma reactor is the plasma reactor having dielectric impedance, shape is board-like, and its dielectric impedance is quartz, pottery or glass material, discharge electrode and ground connection very metal material; Power supply uses Gao Zhongying nanometer high voltage pulse source, or high-frequency high-voltage source, or pulsed high-frequency high-voltage power supply; Top blanketing gas in plasma reactor is O
2, Ar, N
2or its mixture.
4. the treatment unit containing high concentration phenol waste water according to claim 2, it is characterized in that: described biological treatment reactor, is aerobic activated sludge reactor or MBR membrane bioreactor.
Priority Applications (1)
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|---|---|---|---|
| CN201510001110.4A CN104609649A (en) | 2015-01-05 | 2015-01-05 | Method and device for treating wastewater containing high-concentration phenol |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510001110.4A CN104609649A (en) | 2015-01-05 | 2015-01-05 | Method and device for treating wastewater containing high-concentration phenol |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105198094A (en) * | 2015-10-22 | 2015-12-30 | 黄河三角洲京博化工研究院有限公司 | Method for performing intensified treatment on industrial high phenol-content wastewater |
| CN105502806A (en) * | 2015-12-03 | 2016-04-20 | 合肥工业大学 | Efficient pesticide removing system and method based on plasma and multi-group SBR (sequencing batch reactor) reaction tanks |
| CN112551556A (en) * | 2020-12-22 | 2021-03-26 | 山西永东化工股份有限公司 | Method for preparing sodium carbonate by plasma oxidation deposition of coal chemical industry phenol wastewater |
| CN113493242A (en) * | 2021-08-09 | 2021-10-12 | 南京林业大学 | plasma-CaO for synchronously removing organic matters and phosphate radicals2Method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105502806A (en) * | 2015-12-03 | 2016-04-20 | 合肥工业大学 | Efficient pesticide removing system and method based on plasma and multi-group SBR (sequencing batch reactor) reaction tanks |
| CN112551556A (en) * | 2020-12-22 | 2021-03-26 | 山西永东化工股份有限公司 | Method for preparing sodium carbonate by plasma oxidation deposition of coal chemical industry phenol wastewater |
| CN113493242A (en) * | 2021-08-09 | 2021-10-12 | 南京林业大学 | plasma-CaO for synchronously removing organic matters and phosphate radicals2Method |
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Application publication date: 20150513 |