CN209554892U - One kind being used for electroplating wastewater denitrification denitrogenation reactor - Google Patents
One kind being used for electroplating wastewater denitrification denitrogenation reactor Download PDFInfo
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- CN209554892U CN209554892U CN201920058006.2U CN201920058006U CN209554892U CN 209554892 U CN209554892 U CN 209554892U CN 201920058006 U CN201920058006 U CN 201920058006U CN 209554892 U CN209554892 U CN 209554892U
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Abstract
It includes reactor shell, anode lug, blender, guide shell, DC power supply, biologic packing material, water inlet pipe and outlet pipe that the utility model, which provides one kind for electroplating wastewater denitrification denitrogenation reactor,.Shell is directly connected with the cathode of DC power supply as cathode.Anode lug is cylindrical, is co-axially mounted with the stirring rod of blender, and the outer surface of stirring rod is fixedly connected on by insulating materials, and anode lug is connected with the anode of DC power supply.The utility model passes through the rational deployment of blender and guide shell, realizes that floating stuffing is ciculation fluidized in reactor；By once setting yin, yang electrode in biological denitrification denitrification reactor, greatly reduce carbon source dosage while realizing denitrification denitrogenation, especially suitable electronplate dissolves the wastewater treatment of the conductivity such as water height and low ratio of carbon to ammonium.
Description
Technical field
The utility model relates to a kind of sewage treatment equipments, especially a kind of to react for electroplating wastewater denitrification denitrogenation
Device.
Background technique
Total nitrogen content in electroplating industry waste water is higher, is mainly derived from additive used in electroplating process (such as urea)
With nitric acid used in pretreatment process etc..Currently, the ammonia nitrogen of electroplating wastewater processing industry substantially can qualified discharge, influence total nitrogen
Principal element up to standard is NO3The efficient removal of-N.The technique of nitrate nitrogen is removed in industry based on biological denitrification, it is main
Want active sludge, a small amount of biofilm.
When carrying out denitrification denitrogenation using bioanalysis, since content of organics reduces electroplating wastewater after materialization pre-treatment,
Generally require additionally to add organic matter as carbon source, the dosage of organic matter and the ratio that adds need strict control, and organic matter is thrown
Add deficiency, denitrification is incomplete, and works as and add excess, and can generate the secondary pollution of COD；Secondly, technique denitrification is de- at present
Nitrogen load is lower, handles structures and occupation area of equipment is big, fixed investment is big.
In view of the above deficiency, it is intended to and invents a kind of high disposal load and the low electroplating wastewater denitrification of carbon source demand amount
Nitrogen rejection facility.
Summary of the invention
To overcome existing electroplating wastewater denitrification denitrogenation reactor that need to additionally add, organic carbon source, load are low, take up an area big
Defect, the utility model provide a kind of for electroplating wastewater denitrification denitrogenation reactor.
The technical scheme adopted by the utility model to solve the technical problem is as follows: a kind of be used for electroplating wastewater denitrification denitrogenation
Reactor, including reactor shell, anode lug, blender, DC power supply, biologic packing material, water inlet pipe and outlet pipe.Shell is made
Directly it is connected with the cathode of DC power supply for cathode.Anode lug is cylindrical, is co-axially mounted, passes through with the stirring rod of blender
Insulating materials is fixedly connected on the outer surface of stirring rod, and anode lug is connected with the anode of DC power supply.Inside reactor adds
Suspended biological filler is for attached growth of microorganisms.Reactor bottom sets water inlet pipe, and top sets out water pipe.
Above-mentioned one kind is used for electroplating wastewater denitrification denitrogenation reactor, the preferred stainless steel of reactor shell material
Or carbon steel.
Above-mentioned one kind is used for electroplating wastewater denitrification denitrogenation reactor, the preferred titanium of anode material or graphite.
Above-mentioned one kind is used for electroplating wastewater denitrification denitrogenation reactor, the preferred high density polyethylene (HDPE) of the biologic packing material
Or polypropylene, it is suspended in reactor.
Above-mentioned one kind be used for electroplating wastewater denitrification denitrogenation reactor, the preferred Double-curved-surface stirring device of the blender,
The reactor head is equipped with deflector, and it is ciculation fluidized in the reactor to be conducive to suspended biological filler.
Reactor is equipped with yin, yang electrode, and there are electric fields for reaction zone, constitutes biological membrane electrode reaction system, autotrophic denitrification
Bacterium and heterotrophic denitrifying Bacteria coexist, and collaboration participates in biological denitrification denitrification reaction.
(1) heterotrophic denitrification reacts
C6H12O6+4NO3 —→6H2O+6CO2+2N2+ energy
(for using glucose as organic carbon source)
Due to the presence of electric field in reaction zone, denitrifying bacterium permeability of cell membranes is further increased, and accelerates reaction substrate
With the transport of product, while anti-nitration reaction cell enzyme activity is excited, and catalytic performance improves, and accelerates anti-nitration reaction.
(2) autotrophic denitrification reacts
2H2O+2e=H2+2OH- E0=0V
2.16NO3 —+7.24H2+0.8CO2=N2+2.16OH—+5.6H2O+0.16C5H7O2N
After dissolution oxygen depletion near cathode, electrochemistry occurs and produces hydrogen reaction, the H of generation2Can because External Electrical Field to
Diffusion in biomembrane.The H formed due to cathode surface2Usually exist with atomic small bubble, therefore the autotrophy in biomembrane
Denitrifying bacterium can efficiently utilize H2Autotrophic denitrification is carried out, the H that this reaction is generated using electrochemical reaction2As electron donor,
Without additional organic carbon source.The inorganic carbon source of heterotrophic denitrification reaction can be used as the substrate of autotrophic denitrification reaction.Two kinds of reactions
It mutually promotes, biological denitrification denitrification reaction is completed in collaboration.
Biomembrane quantity is more in conversion zone, and for system fluidised form steadily without dead angle, waste water and biofilm contact mass transfer are good, raw
Object film can normally update, and electroplating wastewater conductivity high conduction performance is good, and autotrophy, heterotrophic denitrification react collaboration, cell membrane
Membrane permeability is good, and enzymatic reaction is accelerated, therefore biological denitrification reaction rate is apparently higher than traditional activated sludge process and biomembrane
Technique.Since there are the organic carbon source amounts of autotrophic denitrification reaction, the consumption of unit nitrate nitrogen entirety anti-nitration reaction to greatly reduce,
About 2 ~ 3:1, the surplus sludge volume that biomembrane updates the generation that falls off also greatly reduce.When reaction unit processing plating biochemical treatment system
When system tail water, due to the collaboration supplement of autotrophic denitrification reaction, guarantee heterotrophic denitrification fully reacting without the excessive carbon source that adds,
Reaction unit rear end is not necessarily to decarburization guarantee.
The beneficial effects of the utility model are as follows:
(1) electroplating wastewater denitrification denitrogenation reactor described in the utility model is equipped with yin, yang electrode, forms biological membrane electrode
Reaction system, permeability of cell membrane is good, and enzymatic reaction is accelerated, and autotrophy, heterotrophic denitrification react collaboration, realizes electroplating wastewater
Efficient denitrification denitrogenation greatly reduces carbon source dosage simultaneously, and surplus sludge volume also greatly reduces, and especially suitable electronplate dissolves
The wastewater treatment of the conductivity such as water height and low ratio of carbon to ammonium；
(2) electroplating wastewater denitrification denitrogenation reactor described in the utility model passes through the reasonable cloth of blender and guide shell
Office realizes that floating stuffing is ciculation fluidized in reactor, no short stream, without dead angle, the biomembrane of floating stuffing surface aging with
And dirt cognition falls off under the action of hydraulic shear, overcomes traditional fixed-bed type biofilm reactor easy when handling electroplating wastewater
The defect of fouling, blocking.
Detailed description of the invention
FIG. 1 is a schematic structural view of the utility model.
1. motor in figure, 2. reactor shells, 3. anode lugs, 4. blenders, 5. water inlet pipes, 6. outlet pipes, 7. water conservancy diversion
Plate, 8. manholes, 9. blow-down pipes, 10. DC power supplies, 11. biologic packing materials, arrow indicate water flow and the filler direction of motion.
Specific embodiment
Embodiment 1
Be used for electroplating wastewater denitrification denitrogenation reactor as shown in Figure 1, a kind of, including reactor shell 2, anode lug 3,
Blender 4, DC power supply 10, biologic packing material 11, water inlet pipe 5 and outlet pipe 6.Reactor shell 2 is used as cathode directly and direct current
The cathode of power supply 10 is connected.Anode lug 3 is cylindrical, is co-axially mounted with the stirring rod of blender 4, is fixed by insulating materials
It is connected to the outer surface of stirring rod, anode lug 3 is connected with the anode of DC power supply 10.Inside reactor adds suspended biological and fills out
Material 11 is for attached growth of microorganisms.Reactor bottom sets water inlet pipe 5, and top sets out water pipe 6.
Above-mentioned one kind is used for electroplating wastewater denitrification denitrogenation reactor, and 2 material of reactor shell is preferably stainless
Steel or carbon steel.
Above-mentioned one kind is used for electroplating wastewater denitrification denitrogenation reactor, the anode material casing 3 is of fine quality select titanium or
Graphite.
Above-mentioned one kind is used for electroplating wastewater denitrification denitrogenation reactor, the preferred high-density polyethylene of biologic packing material 11
Alkene or polypropylene, are suspended in reactor, for microorganism in its surface apposition growth.
Above-mentioned one kind be used for electroplating wastewater denitrification denitrogenation reactor, the preferred Double-curved-surface stirring device of blender 4,
The reactor head is equipped with deflector 7, and it is ciculation fluidized in the reactor to be conducive to suspended biological filler.
One kind is for electroplating wastewater denitrification denitrogenation reactor with electroplating wastewater processing factory materializing strategy system or biochemistry
Processing system water outlet is object, and when reaction is run, waste water enters reactor from water inlet pipe 5, if waste water interior carbon source is not able to satisfy
Denitrification denitrogenation needs, can additional proper amount of carbon source, additional carbon and waste water enter by after pipe-line mixer, then from water inlet pipe 5
Inside reactor.Inside reactor fills biologic packing material 11,11 preferred specific surface area about 600 ~ 800m of biologic packing material2/m3Poly- third
Alkene or polyethylene, the filling rate of biologic packing material 11 are 30 ~ 60%.Since the specific surface area of biologic packing material 11 is larger, and hydrophily
Good, surface can a large amount of denitrifying bacterium biomembranes of apposition growth.Blender 4, preferably Double-curved-surface stirring device are installed in reactor.
Under the conditions of the stirring of blender 4 and 5 water conservancy diversion of deflector, 11 shape of biologic packing material of waste water and a large amount of biomembranes of suspension in reaction zone
At the ciculation fluidized state of endless as shown in Figure 1, and non-water flow dead angle and short stream situation in reaction unit, waste water and biology
Film contact mass transfer effect is very good.Fluidized state generates certain hydraulic shear, i.e. guarantee biomembrane easily normally attachment and life
It is long, it ensures that normally falling off for biomembrane, promotes the update of biomembrane.
Shell 2 is directly connected with the cathode of DC power supply 10 as cathode, the positive phase of anode lug 3 and DC power supply 10
Even, electric field is formed in the reaction zone of energization post-reactor, electric field is superimposed with biomembrane constitutes biological membrane electrode reaction system.At this
In a biological membrane electrode reaction system, autotrophic denitrification bacterium and heterotrophic denitrifying Bacteria are coexisted, and collaboration participates in biological denitrification denitrogenation
Reaction.
(1) heterotrophic denitrification reacts
C6H12O6+4NO3 —→6H2O+6CO2+2N2+ energy
(for using glucose as organic carbon source)
Due to the presence of electric field in reaction zone, denitrifying bacterium permeability of cell membranes is further increased, and accelerates reaction substrate
With the transport of product, while anti-nitration reaction cell enzyme activity is excited, and catalytic performance improves, and accelerates anti-nitration reaction.
(2) autotrophic denitrification reacts
2H2O+2e=H2+2OH- E0=0V
2.16NO3 —+7.24H2+0.8CO2=N2+2.16OH—+5.6H2O+0.16C5H7O2N
After dissolution oxygen depletion near cathode, electrochemistry occurs and produces hydrogen reaction, the H of generation2Can because External Electrical Field to
Diffusion in biomembrane.The H formed due to cathode surface2Usually exist with atomic small bubble, therefore the autotrophy in biomembrane
Denitrifying bacterium can efficiently utilize H2Autotrophic denitrification is carried out, the H that this reaction is generated using electrochemical reaction2As electron donor,
Without additional organic carbon source.The inorganic carbon source of heterotrophic denitrification reaction can be used as the substrate of autotrophic denitrification reaction.Two kinds of reactions
It mutually promotes, biological denitrification denitrification reaction is completed in collaboration.
Reactor is discharged through outlet pipe 6 in the complete waste water of denitrification reaction.When reactor needs replacing biologic packing material 11,
Waste water in system can be vented by blow-down pipe 9, then biologic packing material 11 is drawn clearly by manhole 8.
Biomembrane quantity is more in conversion zone, and for system fluidised form steadily without dead angle, waste water and biofilm contact mass transfer are good, raw
Object film can normally update, and electroplating wastewater conductivity high conduction performance is good, and autotrophy, heterotrophic denitrification react collaboration, cell membrane
Membrane permeability is good, and enzymatic reaction is accelerated, therefore biological denitrification reaction rate is apparently higher than traditional activated sludge process and biomembrane
Technique.Since there are the organic carbon source amounts of autotrophic denitrification reaction, the consumption of unit nitrate nitrogen entirety anti-nitration reaction to greatly reduce,
About 2 ~ 3:1, the surplus sludge volume that biomembrane updates the generation that falls off also greatly reduce.When reaction unit processing plating biochemical treatment system
When system tail water, due to the collaboration supplement of autotrophic denitrification reaction, reacted without the excessive i.e. certifiable heterotrophic denitrification of carbon source that adds
Completely, reaction unit rear end is not necessarily to decarburization guarantee.
Embodiment 2
Wenzhou electroplating wastewater processing plant effluent discharge standard is " discharge standard for electroplating pollutants " (GB21900-2008)
In three standard of table, prior art biochemical system is discharged ammonia nitrogen and other indexs alignment request up to standard, but total nitrogen can not be up to standard, out
Water total nitrogen about 95mg/L, TN main component are nitrate nitrogen.Experiment utilizes disclosed by the utility model a kind of anti-for electroplating wastewater
Nitrification denitrification reactor handles the water outlet of its biochemical system, and processing water is 720t/d.
Reactor is to use polypropylene as biologic packing material, and the filling rate of biologic packing material is 30%, and packing specific area is about
600m2/m3, electric current is 26 A, voltage 6V, controls reaction time 1h.Average denitrogenation volumetric loading reaches 2.04kg/m3·
D, the organic carbon source ratio of removal unit nitrate nitrogen demand are 2.47:1, and water outlet TN and COD index reaches three standard of drainage of table
It is required that.See Table 1 for details for water-in and water-out situation.
1 water-in and water-out water quality of table
| Index | Water inlet mg/L | It is discharged mg/L | Removal rate % |
| NO3-N | 90 | 5 | 94.4 |
| TN | 97.6 | 12 | 87.7 |
| COD | 45 | 42 | 6.7 |
A kind of embodiment of the utility model above described embodiment only expresses, the description thereof is more specific and detailed,
But it should not be understood as limiting the scope of the patent of the utility model.It should be pointed out that for the common of this field
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (5)
1. one kind is used for electroplating wastewater denitrification denitrogenation reactor, including reactor shell, blender, biologic packing material, water inlet pipe
And outlet pipe, it is characterised in that: described one kind for electroplating wastewater denitrification denitrogenation reactor further includes anode lug and straight
Galvanic electricity source, reactor shell are directly connected with the cathode of DC power supply as cathode, and anode lug is cylindrical, with blender
Stirring rod is co-axially mounted, and the outer surface of stirring rod, the anode of anode lug and DC power supply are fixedly connected on by insulating materials
It is connected.
2. according to claim 1 a kind of for electroplating wastewater denitrification denitrogenation reactor, which is characterized in that described is anti-
Answering device shell material is stainless steel or carbon steel.
3. according to claim 1 a kind of for electroplating wastewater denitrification denitrogenation reactor, which is characterized in that the sun
Pole sleeve material is titanium or graphite.
4. according to claim 1 a kind of for electroplating wastewater denitrification denitrogenation reactor, which is characterized in that the life
Object filler is high density polyethylene (HDPE) or polypropylene.
5. according to claim 1 a kind of for electroplating wastewater denitrification denitrogenation reactor, which is characterized in that described stirs
Mixing device is Double-curved-surface stirring device, and the reactor head is equipped with deflector.
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| CN109502768A (en) * | 2019-01-14 | 2019-03-22 | 浙江海拓环境技术有限公司 | One kind being used for electroplating wastewater denitrification denitrogenation reactor |
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