CN109319927A - A kind of method and device of electro-chemical systems coupling sulphur autotrophic denitrification - Google Patents
A kind of method and device of electro-chemical systems coupling sulphur autotrophic denitrification Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2866—Particular arrangements for anaerobic reactors
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/005—Combined electrochemical biological processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/286—Anaerobic digestion processes including two or more steps
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/163—Nitrates
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
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Abstract
The present invention provides a kind of method and devices of electro-chemical systems coupling sulphur autotrophic denitrification, it is related to water treatment field, the device of the electro-chemical systems coupling sulphur autotrophic denitrification includes reactor, electrochemical assembly and sulfur granules, in which: the reactor includes inlet and outlet；The electrochemical assembly is set in the reactor, and the electrochemical assembly includes anode and cathode, and the material of the anode is carbon, and the material of the cathode is conductive metal；When working condition, the surface enrichment autotrophic denitrification function bacterium of the cathode；The sulfur granules are filled in the electrochemical assembly；When working condition, the surface enrichment autotrophic denitrification function bacterium of the sulfur granules.The device of electro-chemical systems coupling sulphur autotrophic denitrification provided by the invention realizes quick, efficient denitrification under the composite electron donor effect of sulphur, hydrogen and electrode by being coupled sulphur autotrophic denitrification method and hydrogen autotrophic denitrification method.
Description
Technical field
The present invention relates to water treatment fields, and in particular to a kind of method and dress of electro-chemical systems coupling sulphur autotrophic denitrification
It sets.
Background technique
Water eutrophication is a global phenomenon in recent decades, is influenced by mankind's activity, the water such as river, lake
The increase of nutrient discharge amount makes water body tend to eutrophication in body.When water eutrophication occurs, certain alga eruptions are made
Deteriorate at water quality anoxic, destroys the stability of water ecosystem, seriously affect urban water supply and safe drinking water.Water eutrophication
The basic origin cause of formation changed is the increase of nutrient nitrogen and phosphorus, and in order to solve the problems, such as water eutrophication, China is built a large amount of
Urban wastewater treatment firm, so that town sewage is discharged into rivers and lakes by processing.Although urban wastewater treatment firm through biochemistry at
Reason can cut down most of pollutant, but the nitrogen concentration being discharged is still higher, therefore the water outlet of urban wastewater treatment firm
Middle nitrogen element content height is still the main reason for causing water eutrophication.
In order to improve Water quality, the water outlet of urban wastewater treatment firm urgently advanced treating, especially to wherein nitrogen
Advanced treating.
In view of the above drawbacks, creator of the present invention obtains the present invention by prolonged research and practice finally.
Summary of the invention
To solve above-mentioned technological deficiency, the technical solution adopted by the present invention is, provides a kind of electro-chemical systems coupling sulphur
The device of autotrophic denitrification, including reactor, electrochemical assembly and sulfur granules, in which:
The reactor includes inlet and outlet；
The electrochemical assembly is set in the reactor, and the electrochemical assembly includes anode and cathode, the sun
The material of pole is carbon, and the material of the cathode is conductive metal；When working condition, the surface enrichment autotrophic denitrification of the cathode
Function bacterium；
The sulfur granules are filled in the electrochemical assembly；When working condition, the surface enrichment autotrophy of the sulfur granules
Denitrification function bacterium.
Optionally, the cathode is reticular structure.
Optionally, the material of the cathode is stainless steel.
Optionally, the anode is carbon brush.
Optionally, the reactor is upwelling type reactor；The water inlet is set to the bottom end of the reactor；Institute
State the top that water outlet is set to the reactor.
Optionally, the reactor further includes refluxing opening, and the refluxing opening is connected with the water inlet by pipeline.
Optionally, the reactor declines streaming biofilter；The water inlet is set to the top of the reactor；Institute
State the bottom end that water outlet is set to the reactor.
Another object of the present invention is to provide a kind of methods of electro-chemical systems coupling sulphur autotrophic denitrification, comprising:
Pending water is passed through reactor, electrode and sulfur granules are provided in the reactor, wherein the electrode and
The surface enrichment autotrophic denitrification function bacterium of the sulfur granules；
Nitrate in the pending water in occurring the reaction of sulphur autotrophic denitrification and hydrogen autotrophy simultaneously in the reactor
Anti-nitration reaction, the water that obtains that treated.
Optionally, the surface that the sulphur autotrophic denitrification reacts on the sulfur granules carries out；The hydrogen autotrophic denitrification is anti-
The surface of electrode described in Ying Yu carries out.
Optionally, the method for electro-chemical systems coupling sulphur autotrophic denitrification further include: will treated the water weight
The reactor is newly passed through to be handled.
Compared with the prior art the beneficial effects of the present invention are:
The device of electro-chemical systems coupling sulphur autotrophic denitrification provided by the invention, by the way that electrochemical assembly to be set to instead
It answers in device, sulfur granules, and the surface enrichment autotrophic denitrification function on sulfur granules surface and cathode is filled in electrochemical assembly
Bacterium acts on to being coupled sulphur autotrophic denitrification method and hydrogen autotrophic denitrification method in the composite electron donor of sulphur, hydrogen and electrode
It is lower to realize quick, efficient denitrification.
Detailed description of the invention
It, below will be to required in embodiment description in order to illustrate more clearly of the technical solution in various embodiments of the present invention
The attached drawing used is briefly described.
Fig. 1 is the device schematic diagram of electro-chemical systems coupling sulphur autotrophic denitrification of the invention；
Fig. 2 is the top view of the fixed device of electrochemical assembly of the invention；
Fig. 3 is the front view of fixation device of the invention；
Fig. 4 is the structure diagram of bottom plate of the invention.
Digital representation in figure:
1- reactor；11- water inlet；12- water outlet；13- refluxing opening；14- detection mouth；15- gas vent；The fixed dress of 16-
It sets；161- anode fixation hole；162- adds sulphur hole；163- wire guide；164- screw hole；2- electrochemical assembly；21- anode；22- yin
Pole；23- bottom plate；231- water distributing pore；3- sulfur granules.
Specific embodiment
Below in conjunction with attached drawing, the forgoing and additional technical features and advantages are described in more detail.
Since biological autotrophic denitrification method has the advantages that process is simple, treatment effeciency is high, it is widely used in the depth of water body
Degree processing；Autotrophic denitrification method mainly uses sulphur or hydrogen as electron donor；The nitre for using sulphur to be gone in water removal as electron donor
Hydrochlorate, has that cost is relatively low, economic convenient advantage, but this method sulphur is oxidized to sulfate radical, leads to the sulphur in water outlet
Hydrochlorate increases, and if calcium carbonate is not added to adjust the pH value of water outlet, will cause H in water outlet+Content increases, pH decline.With
Hydrogen carries out autotrophic denitrification in going water removal while nitrate as electron donor, without secondary pollution, treated water body without
Additional biological treatment need to be carried out again, but since external source hydrogen supply is easy to explode, and hydrogen higher cost, be unsuitable for answering on a large scale
With.The present inventor passes through a large amount of scientific experiment, provides a kind of electro-chemical systems coupling anti-nitre of sulphur autotrophy in the present invention
Sulphur autotrophic denitrification and electro-chemical systems autotrophic denitrification are coupled by the method and apparatus of change, and the reaction of sulphur autotrophic denitrification produces
Raw H+, electro-chemical systems autotrophic denitrification reaction for by electrolytic method production hydrogen provide electron donor for autotrophic denitrification process,
The H generated in sulphur autotrophic denitrification reaction process is wherein consumed in electro-chemical systems autotrophic denitrification reaction process+, so that sulphur is certainly
Support the H generated during anti-nitration reaction+It can be consumed in situ, i.e. the H of sulphur autotrophic denitrification generation+Facilitate cathode hydrogen certainly
Denitrification is supported, while hydrogen autotrophic denitrification passes through consumption H+The acid-base balance that basicity maintains reaction system is generated, additional stone is not necessarily to
Lime stone adjusts pH value.By being enriched with autotrophic denitrification function bacterium respectively on cathode, sulfur granules surface, in answering for sulphur, hydrogen and electrode
It closes and realizes quick, efficient denitrification under electron donor effect.
Embodiment one
The present embodiment provides a kind of device of electro-chemical systems coupling sulphur autotrophic denitrification, shown in Figure 1, the electrochemistry
The device that system couples sulphur autotrophic denitrification includes reactor 1, electrochemical assembly 2 and sulfur granules 3, in which: reactor 1 includes
Water inlet 11 and water outlet 12；Electrochemical assembly 2 is set in reactor 1, and electrochemical assembly 2 includes anode 21 and cathode 22,
The material of anode 21 is carbon, and the material of cathode 22 is conductive metal；The surface enrichment autotrophic denitrification function bacterium of cathode 22；Sulphur
Grain 3 is filled in electrochemical assembly 2；The surface enrichment autotrophic denitrification function bacterium of sulfur granules 3.
In the device of electro-chemical systems coupling sulphur autotrophic denitrification provided in this embodiment, certainly due to sulfur granules surface enrichment
Denitrification function bacterium is supported, is carried out at sewage in the device using electro-chemical systems provided in this embodiment coupling sulphur autotrophic denitrification
When reason, sewage to be processed is added from the water inlet 11 of the device of electro-chemical systems coupling sulphur autotrophic denitrification, sewage flows through
When sulfur granules 3,3 one side of sulfur granules is retained as pollutant of the filler to bulk in sewage, is on the other hand enriched in sulphur
The autotrophic denitrification function bacterium on 3 surface of particle is using sulphur as electron donor, by the NO3 in sewage-It is reduced to N2, the equation of reaction
It is as follows:
Low-tension current is applied to the electrochemical assembly 2 being placed in reactor 1, wherein sulphur autotrophic denitrification process (1) generates
H+H can be reduced in cathode2, the equation of reaction is as follows:
2H++2e→H2(e0=0.000V) (2)
Meanwhile when external voltage reaches certain negative potential, the generation electrolysis aquatic products hydrogen reaction on cathode 22, reaction equation is such as
Under:
2H2O+2e→H2+2OH-(e0=-0.828V) (3)
Due to 22 surface enrichment of cathode autotrophic denitrification function bacterium, it is enriched in the autotrophic denitrification on 22 surface of cathode
(2) and (3) two approach obtain hydrogen to function bacterium from the reactions above, carry out autotrophic denitrification denitrogenation by electron donor of hydrogen, instead
Answer equation as follows:
In the compound system constituted in the device of electro-chemical systems provided in this embodiment coupling sulphur autotrophic denitrification hydrogen from
It is as follows to support denitrifying reaction equation:
Due to the device of electro-chemical systems provided in this embodiment coupling sulphur autotrophic denitrification, electrochemical assembly 2 is placed in instead
Answer in device 1, sulfur granules 3 are filled in electrochemical assembly 2, thus by the sulphur autotrophic denitrification method occurred in 3 surface of sulfur granules with
The hydrogen autotrophic denitrification method that 22 surface of cathode of electrochemical assembly 2 generates is coupled, and removes dereaction by hydrogen autotrophic denitrification method
While nitrate in system, since the reaction of hydrogen autotrophic denitrification consumes the H generated in sulphur autotrophic denitrification reaction process+, basicity is produced, to maintain the acid-base balance of reaction system, adjusts pH value (the suitable pH of denitrification without additional lime stone
Range is 6.5-8).By being enriched with autotrophic denitrification function bacterium respectively on cathode 22,3 surface of sulfur granules, in sulphur, hydrogen and electrode
The effect of composite electron donor is lower to realize quick, efficient denitrification.
To enable sewage adequately to carry out the reaction of sulphur autotrophic denitrification and the reaction of hydrogen autotrophic denitrification in reactor 1,
The water inlet 11 of reactor 1 and water outlet 12 are respectively arranged to the both ends of reactor 1 in the present embodiment；So that into reactor
The cathode 22 of sewage and sulfur granules 3 and electrochemical assembly 2 in 1 comes into full contact with, and improves the conversion ratio of reaction, realizes efficiently de-
Nitrogen.
To select anode 21 of the inert substance carbon as electrochemical assembly 2 convenient for electrolyzing the water, in the present embodiment, and
Select cathode 22 of the metal as electrochemical assembly 2.
By the following method in 3 surface enrichment autotrophic denitrification function bacterium of cathode 22 and sulfur granules in the present embodiment: will be electric
Chemical component 2 is placed in reactor 1, and sulfur granules 3 are filled in electrochemical assembly 2；Denitrification is inoculated in reactor 1
Desulfurization autotrophy sludge (Specific amounts depending on the size of reactor 1, the preferred 300mL of the present embodiment) and secondary settling tank sludge are (specific
Amount is depending on the size of reactor 1, the preferred 100mL of the present embodiment) and mixed, it intakes from the water inlet 11 of reactor 1
To being tamed in reactor 1；The index that reactor 1 is intake during taming are as follows: NO3 --N 60mg/L；NH4 +-N 10mg/L；TP
4mg/L；NaHCO30.4g/L, the preferred 12h of hydraulic detention time the present embodiment.Since the growth of 22 microorganism of cathode is more slow,
Reactor 1 is quickly tamed by the way of electrode reversion.First using the electrode of metal material as anode, inert substance carbon is
Cathode, applied voltage 0.5V.After two weeks, electrode is inverted for domestication, continues domestication 7 days.In one month by a definite date continuous domestication
Under, 3 surface of sulfur granules, which forms, can use elemental sulfur as electron donor, and the sulphur autotrophy using nitrate as electron acceptor is anti-
Nitrifier；Simultaneously under the stimulation of electric current, on 22 surface of cathode, the nitrate conduct using cathode 22 as electron donor is formd
The electroactive autotrophic denitrification bacterium of electron acceptor.
The device of electro-chemical systems coupling sulphur autotrophic denitrification provided in this embodiment, by the way that electrochemical assembly 2 to be arranged
In in reactor 1, sulfur granules 3, and the surface enrichment autotrophy on 3 surface of sulfur granules and cathode 22 are filled in electrochemical assembly 2
Denitrification function bacterium, to sulphur autotrophic denitrification method and hydrogen autotrophic denitrification method are coupled, in the compound electric of sulphur, hydrogen and electrode
Sub- donor effect is lower to realize quick, efficient denitrification.
Embodiment 2
On the basis of embodiment 1, electricity in the device of electro-chemical systems coupling sulphur autotrophic denitrification provided in this embodiment
The shape of the cathode 22 of chemical component 2 is reticular structure.
Cathode 22 is designed as reticular structure, is on the one hand conducive to the surface area for increasing cathode 22, so that more autotrophys
Denitrification function bacterium is enriched in 22 surface of cathode；On the other hand processing water passes through mesh, can be anti-with the autotrophy that is enriched on mesh
Nitrification function bacterium comes into full contact with, to improve hydrogen autotrophic denitrification method to the processing capacity of nitrate from waste water；Again certainly due to hydrogen
The H generated in sulphur autotrophic denitrification reaction process can be consumed by supporting in denitrification method reaction process+, to further promote sulphur autotrophy
The progress of anti-nitration reaction, so that the device realization of electro-chemical systems coupling sulphur autotrophic denitrification is efficiently denitrogenated.
By sulfur granules 3 are filled in electrochemical assembly 2 in this present embodiment, and the sulphur carried out by 3 surface of sulfur granules
Autotrophic denitrification reaction is reacted total couple with the hydrogen autotrophic denitrification that 22 surface of cathode occurs and is denitrogenated to realize, in the present embodiment into
The cathode 22 of electrochemical assembly 2 is set net tubular structure by one step, i.e. cathode 22 is tubular structure, and the side of the tubular structure
Wall is netted.
After sulfur granules 3 are placed in the cathode 22 of net cylinder shape, the H of sulphur autotrophic denitrification generation+Facilitate cathode hydrogen certainly
Denitrification is supported, while hydrogen autotrophic denitrification passes through consumption H+The acid-base balance that basicity maintains reaction system is generated, realizes sulphur autotrophy
Denitrification is coupled with bioelectrochemical system.
The material of the cathode 22 of electrochemical assembly 2 can select stainless steel, iron, metallic nickel, Titanium, tungsten, metal
The material with good conductivity such as aluminium, carbon fiber；Have cheap, good corrosion resistance, Castability strong based on stainless steel material
The advantages that, the material of the preferred cathode 22 of the present embodiment is stainless steel.
Referring to fig. 2, shown in Fig. 3, to include inside reactor 1 convenient for electrochemical assembly 2 and reactor 1 to be fixed
Fixed device 16, the fixation device 16 is for being fixed electrochemical assembly 2.
Screw hole 164 is distributed on the side wall of the fixation device 16, for passing through corresponding position on screw and 22 side wall of cathode
The screw hole at place is connected, to realize the fixation of electrochemical assembly 2 Yu reactor 1.
The lower end surface of fixed device 16, i.e., the end face being connected with electrochemical assembly 2 are hollow structure；Fix the upper of device 16
An anode fixation hole 161 and multiple plus sulphur hole 162 are distributed on surface, Anodic fixation hole 161 is set to fixed device
At 16 center, for anode 21 to be fixed, i.e., anode 21 passes through the net cylinder shape knot that anode fixation hole 161 protrudes into cathode 22
In structure；The aperture of anode fixation hole 161 is depending on the size of anode 21；The internal diameter of the present embodiment preferred anodes fixation hole 161
For 10mm.
Multiple plus sulphur hole 162 is uniformly distributed in around anode fixation hole 161, for being added sulfur granules 3 to electrochemistry
In component 2；Add the size in sulphur hole 162 depending on the size of sulfur granules 3；The present embodiment preferably adds the internal diameter in sulphur hole 162 to be
18mm。
When installing to electrochemical assembly 2, the screw hole and fixed device 16 on 22 side wall of cathode are passed through by screw
Anode 21, is then fixed at anode fixation hole 161 by the screw hole on side wall, the fixation of realization cathode 22 and fixed device 16,
Assembled electrochemical assembly 2 and fixed device 16 are placed in reactor 1 again, by adding sulphur hole 162 that sulfur granules 3 are added.
In working condition, on fixed device 16 plus sulphur hole 162 is alternatively arranged as the channel of water flow, for reactor 1
Interior water flow plays guide functions.To be also uniformly distributed in the edge of fixed device 16 convenient for applying voltage to electrochemical assembly 2
There are multiple wire guides 163, is in contact for making conducting wire pass through wire guide 163 with electrochemical assembly 2.
It is shown in Figure 4, for convenient for being supported to the sulfur granules 3 in electrochemical assembly 2, the bottom of electrochemical assembly 2
It is additionally provided with bottom plate 23, water distributing pore 231 is set on the bottom plate 23, and the water distributing pore 231 is for passing through water flow；To make water distributing pore
231 play the role of water distribution uniformity, multiple water distributing pores 231 are arranged on bottom plate 23, and multiple water distributing pores 231 are in equal on bottom plate 23
Even distribution.To avoid sulfur granules 3 from leaking out from water distributing pore 231, the internal diameter of water distributing pore 231 should be less than the outer diameter of sulfur granules 3, as
It is preferred that the internal diameter of water distributing pore 231 should be less than the 1/2 of 3 outer diameter of sulfur granules.The net cylinder of the cathode 22 of bottom plate 23 and electrochemical assembly 2
Shape structure is connected, and bottom plate 23, cathode 22 and fixed device 16 collectively form an overall structure, and the overall structure is in working condition
When, sulfur granules 3 and anode 21 are limited to inside the overall structure, make pending water by the overall structure, with sulfur granules 3
The autotrophic denitrification function bacterium on 22 surface of surface and cathode is in contact and is reacted, to remove the NO in pending water3 -。
The material selection carbon of anode 21, the progress of for the benefit of cell reaction, the present embodiment preferred anodes 21 are carbon brush, that is, are existed
The side of carbon-point is provided with multiple branches.Anode 21 is selected into carbon brush, is conducive to the contact area for increasing anode 21, convenient for increasing
Electrolysis strength is conducive to the progress of cell reaction, thus H in reactor+Content, conducive to hydrogen autotrophic denitrification reaction into
Row.
The device of electro-chemical systems provided in this embodiment coupling sulphur autotrophic denitrification, by by the sun of electrochemical assembly 2
Pole 21 is designed as carbon brush, and the cathode 22 of electrochemical assembly 2 is designed as to the net cylinder structure of stainless steel material, by promoting hydrogen autotrophy
The progress of anti-nitration reaction reinforces hydrogen autotrophic denitrification and sulphur autotrophy to be further driven to the progress of sulphur autotrophic denitrification reaction
The coupling of anti-nitration reaction realizes quick, efficient denitrification under the composite electron donor effect of sulphur, hydrogen and electrode.
The device of electro-chemical systems coupling sulphur autotrophic denitrification provided in this embodiment, no additional carbon demand can be effective
Carbon source is avoided to remain bring secondary pollution problem.In addition, compared to anti-nitre of common heterotrophism such as methanol, ethyl alcohol, grape sugar and starches
Change filter tank and add carbon source, elemental sulfur is cheap, and easily stored and transport；The denitrification process of the present apparatus is based on autotrophic metabolism mistake
Journey, biomass increases slowly, and can effectively reduce Treatment of Sludge expense and filter back washing frequency.
Embodiment 3
It is anti-in the device of electro-chemical systems coupling sulphur autotrophic denitrification provided in this embodiment on the basis of embodiment 2
Answering device 1 is upwelling type reactor.
Reactor 1 is designed as upwelling type reactor, so that pending water enters from the lower part of reactor 1, after processing
Water from the top of reactor 1 flow out；It selects upwelling type reactor as reactor 1, is conducive to full of entire reactor 1,
Water into reactor 1 is both needed to move to top from the bottom of reactor 1 and could flow out from water outlet 12, thus guarantee water with react
Electrochemical assembly 2 and sulfur granules 3 in device 1 come into full contact with, and guarantee the abundant progress of reaction, to promote to utilize the electrochemistry
System couples the denitrification effect of the method for sulphur autotrophic denitrification.
To further increase coming into full contact with for water and electrochemical assembly 2 and sulfur granules 3, the present embodiment is by reactor 1
Water inlet 11 is set to the bottom end of reactor 1, and water outlet 12 is set to the top of reactor 1.
To be detected to the processing water water quality in reactor 1, it is provided at different height on the side wall of reactor 1 more
A detection mouth 14, for being detected to the water quality at different height in reactor；On the top of reactor 1, refluxing opening is set
13, refluxing opening 13 is connected by pipeline with water inlet 11；It is provided with valve on pipeline between refluxing opening 13 and water inlet 11, it should
Valve is in close state under normal circumstances；Pipeline between refluxing opening 13 and water inlet 11 acts on of both having, a work
With to close the water outlet 12 of reactor 1 when water quality is unqualified in detection reactor 1, refluxing opening 13 and water inlet 11 are opened
Between valve on pipeline, the water that makes that treated, which is again introduced into reactor 1, carries out secondary treatment, in the water that guarantees that treated
Nitrogen content is up to standard；Another effect is changed to increase the water inlet flow velocity at 1 water inlet 11 of reactor by increasing water inlet flow velocity
The fluidised form of water between 3 hole of sulfur granules increases the disturbance of water, reduces and generates blocking between sulfur granules；It is returned by refluxing opening 13
The regurgitant volume of water inlet 11 is flow to depending on the water quality of pending water；When the water quality of pending water is preferable, can stop flowing back
Or reduce regurgitant volume；When the water quality of pending water is poor, it is possible to increase regurgitant volume.
It is generated due to having gas during anti-nitration reaction, electro-chemical systems coupling sulphur autotrophy provided in this embodiment is anti-
The device of nitrification is provided with venthole 15 on the top of reactor 1, in order to which the gas generated in reaction process is discharged in time
Reactor 1 guarantees going on smoothly for anti-nitration reaction.
Embodiment 4
On the basis of embodiment 1, the device of electro-chemical systems coupling sulphur autotrophic denitrification provided in this embodiment, reaction
Device 1 selects decline streaming biofilter.Due to being generated during anti-nitration reaction under decline streaming biofilter flow direction median
The gases such as nitrogen rise, and the gas of rising plays the role of being equivalent to stirring to the reactant in reactor 1, so that water and sulphur
3 mixing of grain is all right, close to being thoroughly mixed technique, while being conducive to increase coming into full contact with for processing water and electrochemical assembly 2,
Conducive to the progress of anti-nitration reaction.For upwelling type reactor close to pulling flow type technique, reactor 1 is anti-using upwelling type simultaneously
Answer device that the rate of filtration in reactor 1 is made to be easier to accurately control.
For going on smoothly convenient for anti-nitration reaction, when reactor 1 is using upwelling type reactor, the water inlet of reactor 1
Mouth 11 is set to the top of reactor 1；Water outlet 12 is set to the bottom end of reactor 1.
Embodiment 5
The present embodiment provides a kind of method of electro-chemical systems coupling sulphur autotrophic denitrification, which couples sulphur certainly
Supporting denitrifying method includes: that pending water is passed through reactor, electrode and sulfur granules is provided in the reactor, wherein electrode
And the surface of sulfur granules is enriched with autotrophic denitrification function bacterium；Nitrate in pending water in occurring sulphur simultaneously in reactor
Autotrophic denitrification reaction is reacted with hydrogen autotrophic denitrification, the water that obtains that treated.
It, will when carrying out denitrification processing using the method for electro-chemical systems provided in this embodiment coupling sulphur autotrophic denitrification
Pending water is passed through in the reactor for being provided with electrode, is additionally provided with sulfur granules in the reactor；The electrode and sulfur granules
Surface is enriched with autotrophic denitrification function bacterium；Apply voltage to electrode, pending water is passed through from the water inlet of reactor, so that
Processing water in reactor sulfur granules and electrode come into full contact with, the nitrate in water sulfur granules surface generation sulphur autotrophy it is anti-
Nitration reaction generates H+；It is electrolysed simultaneously in electrode, generates H2；In the H that sulfur granules surface generates+It is gone back in the cathode of electrode
It originally is H2, H of the denitrification function bacterium being enriched on cathode to obtain2The reaction of hydrogen autotrophic denitrification is carried out as electron donor.
The method of electro-chemical systems provided in this embodiment coupling sulphur autotrophic denitrification, by by sulphur autotrophic denitrification method with
Hydrogen autotrophic denitrification method is coupled, and realizes that hydrogen autotrophic denitrification consumes the H generated in sulphur autotrophic denitrification reaction process in situ+,
Quick, efficient denitrification is realized under the composite electron donor effect of sulphur, hydrogen and electrode；Electro-chemical systems coupling provided in this embodiment
The method of sulphur autotrophic denitrification is closed without additional carbon demand, can effectively avoid carbon source residual bring secondary pollution problem.In addition,
Carbon source is added compared to the common heterotrophic denitrification filter tank such as methanol, ethyl alcohol, grape sugar and starch, elemental sulfur is cheap, and is easy to
Storage and transport；The denitrification process of this reaction is based on autotrophic metabolism process, and biomass increasess slowly, and can effectively reduce Treatment of Sludge
Expense and filter back washing frequency.
To further increase the water quality for utilizing electro-chemical systems to couple sulphur autotrophic denitrification method treated water, this implementation
The method for the electro-chemical systems coupling sulphur autotrophic denitrification that example provides further includes by treated water after the water that obtains that treated
Again reactor is passed through to be handled.
Will treated that water is passed through reactor again handles, i.e., will treated that water flows back, have of both
Effect, an effect open reactor refluxing opening to close the water outlet of reactor when water quality is unqualified in detection reactor
Valve between water inlet on pipeline, the water that makes that treated, which is again introduced into reactor, carries out secondary treatment, to guarantee to handle
Nitrogen content is up to standard in water afterwards；Another effect is the water inlet flow velocity for increasing reactor water inlet, passes through increase water inlet flow velocity
Change the fluidised form of the water between sulfur granules hole, increase the disturbance of water, reduces and generate blocking between sulfur granules；Pass through refluxing opening
The regurgitant volume of water inlet is back to depending on the water quality of pending water；When the water quality of pending water is preferable, can stop flowing back
Or reduce regurgitant volume；When the water quality of pending water is poor, it is possible to increase regurgitant volume.
The method of electro-chemical systems coupling sulphur autotrophic denitrification provided in this embodiment, is flowed back by increasing, is further protected
Nitrogen content is up to standard in water of having demonstrate,proved that treated, while avoiding generating blocking between sulfur granules by increasing reflux, guarantees at water
Reason is gone on smoothly.
The foregoing is merely presently preferred embodiments of the present invention, is merely illustrative for the purpose of the present invention, and not restrictive
's.Those skilled in the art understand that in the spirit and scope defined by the claims in the present invention many changes can be carried out to it,
It modifies or even equivalent, but falls in protection scope of the present invention.
Claims (10)
1. a kind of device of electro-chemical systems coupling sulphur autotrophic denitrification, which is characterized in that including reactor (1), electrochemistry group
Part (2) and sulfur granules (3), in which:
The reactor (1) includes water inlet (11) and water outlet (12)；
The electrochemical assembly (2) is set in the reactor (1), and the electrochemical assembly (2) includes anode (21) and yin
Pole (22), the material of the anode (21) are carbon, and the material of the cathode (22) is conductive metal；When working condition, the yin
The surface enrichment autotrophic denitrification function bacterium of pole (22)；
The sulfur granules (3) are filled in the electrochemical assembly (2)；When working condition, the surface enrichment of the sulfur granules (3)
Autotrophic denitrification function bacterium.
2. the device of electro-chemical systems coupling sulphur autotrophic denitrification as described in claim 1, which is characterized in that the cathode
It (21) is reticular structure.
3. the device of electro-chemical systems coupling sulphur autotrophic denitrification as claimed in claim 2, which is characterized in that the cathode
(22) material is stainless steel.
4. the device of electro-chemical systems coupling sulphur autotrophic denitrification as described in claim 1, which is characterized in that the anode
It (21) is carbon brush.
5. the device of electro-chemical systems coupling sulphur autotrophic denitrification as described in claim 1, which is characterized in that the reactor
It (1) is upwelling type reactor；The water inlet (11) is set to the bottom end of the reactor (1)；The water outlet (12) sets
It is placed in the top of the reactor (1).
6. the device of electro-chemical systems coupling sulphur autotrophic denitrification as claimed in claim 5, which is characterized in that the reactor
It (1) further include refluxing opening (13), the refluxing opening (13) is connected with the water inlet (11) by pipeline.
7. the device of electro-chemical systems coupling sulphur autotrophic denitrification as described in claim 1, which is characterized in that the reactor
(1) decline streaming biofilter；The water inlet (11) is set to the top of the reactor (1)；The water outlet (12) sets
It is placed in the bottom end of the reactor (1).
8. a kind of method of electro-chemical systems coupling sulphur autotrophic denitrification characterized by comprising
Pending water is passed through reactor, electrode and sulfur granules are provided in the reactor, wherein the electrode and described
The surface enrichment autotrophic denitrification function bacterium of sulfur granules；
Nitrate in the pending water in occurring the reaction of sulphur autotrophic denitrification and the anti-nitre of hydrogen autotrophy simultaneously in the reactor
Change reaction, the water that obtains that treated.
9. the method for electro-chemical systems coupling sulphur autotrophic denitrification as claimed in claim 8, which is characterized in that the sulphur autotrophy
Anti-nitration reaction is carried out in the surface of the sulfur granules；The surface that the hydrogen autotrophic denitrification reacts on the electrode carries out.
10. the method for electro-chemical systems coupling sulphur autotrophic denitrification as claimed in claim 8, which is characterized in that the electrification
The method of system coupling sulphur autotrophic denitrification further include: treated that water is passed through again at the reactor by described
Reason.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111115847A (en) * | 2019-12-30 | 2020-05-08 | 浙江大学 | Denitrification method and device based on electrochemical sulfate circulation |
| CN111675432A (en) * | 2020-06-16 | 2020-09-18 | 河海大学 | Flow type sediment-based biochar electrochemical denitrification filter device |
| CN112607847A (en) * | 2020-11-19 | 2021-04-06 | 西北工业大学 | Sewage nitrogen and phosphorus removal treatment method, device and application |
| CN112794553A (en) * | 2020-12-22 | 2021-05-14 | 哈尔滨工创环保科技有限公司 | Device for treating coal pyrolysis wastewater through micro-electric field coupling sulfur autotrophic denitrification and method for treating coal pyrolysis wastewater by using device |
| CN113371816A (en) * | 2021-06-09 | 2021-09-10 | 中国海洋大学 | Efficient denitrification reactor, system and method for tail water of mariculture |
| CN113461170A (en) * | 2021-05-27 | 2021-10-01 | 安徽中源锦天环境科技股份有限公司 | Method and equipment for rapidly culturing autotrophic denitrification cable bacteria and application |
| CN113716680A (en) * | 2021-09-27 | 2021-11-30 | 中山大学 | Deep denitrification device and method for landfill leachate of electrochemical coupling sulfur autotrophic denitrification system |
| CN114956462A (en) * | 2022-05-31 | 2022-08-30 | 桂林理工大学 | Inductively coupled double-iron-based autotrophic denitrification filter tank treatment method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111115847A (en) * | 2019-12-30 | 2020-05-08 | 浙江大学 | Denitrification method and device based on electrochemical sulfate circulation |
| CN111675432A (en) * | 2020-06-16 | 2020-09-18 | 河海大学 | Flow type sediment-based biochar electrochemical denitrification filter device |
| CN111675432B (en) * | 2020-06-16 | 2021-09-28 | 河海大学 | Flow type sediment-based biochar electrochemical denitrification filter device |
| CN112607847A (en) * | 2020-11-19 | 2021-04-06 | 西北工业大学 | Sewage nitrogen and phosphorus removal treatment method, device and application |
| CN112794553A (en) * | 2020-12-22 | 2021-05-14 | 哈尔滨工创环保科技有限公司 | Device for treating coal pyrolysis wastewater through micro-electric field coupling sulfur autotrophic denitrification and method for treating coal pyrolysis wastewater by using device |
| CN112794553B (en) * | 2020-12-22 | 2022-08-02 | 哈尔滨工创环保科技有限公司 | Device for treating coal pyrolysis wastewater through micro-electric field coupling sulfur autotrophic denitrification and method for treating coal pyrolysis wastewater by using device |
| CN113461170A (en) * | 2021-05-27 | 2021-10-01 | 安徽中源锦天环境科技股份有限公司 | Method and equipment for rapidly culturing autotrophic denitrification cable bacteria and application |
| CN113371816A (en) * | 2021-06-09 | 2021-09-10 | 中国海洋大学 | Efficient denitrification reactor, system and method for tail water of mariculture |
| CN113716680A (en) * | 2021-09-27 | 2021-11-30 | 中山大学 | Deep denitrification device and method for landfill leachate of electrochemical coupling sulfur autotrophic denitrification system |
| CN114956462A (en) * | 2022-05-31 | 2022-08-30 | 桂林理工大学 | Inductively coupled double-iron-based autotrophic denitrification filter tank treatment method |
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