CN108217984A - Three-diemsnional electrode coupling microorganism electrolysis cell processing ammonia nitrogen waste water recycling ammonia device - Google Patents
Three-diemsnional electrode coupling microorganism electrolysis cell processing ammonia nitrogen waste water recycling ammonia device Download PDFInfo
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- CN108217984A CN108217984A CN201810297505.7A CN201810297505A CN108217984A CN 108217984 A CN108217984 A CN 108217984A CN 201810297505 A CN201810297505 A CN 201810297505A CN 108217984 A CN108217984 A CN 108217984A
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 79
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 39
- 244000005700 microbiome Species 0.000 title claims abstract description 31
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 24
- 239000002351 wastewater Substances 0.000 title claims abstract description 24
- 238000012545 processing Methods 0.000 title claims abstract description 15
- 238000004064 recycling Methods 0.000 title claims abstract description 15
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 230000008878 coupling Effects 0.000 title claims abstract description 11
- 238000010168 coupling process Methods 0.000 title claims abstract description 11
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000002245 particle Substances 0.000 claims abstract description 18
- 239000012528 membrane Substances 0.000 claims abstract description 9
- 238000005341 cation exchange Methods 0.000 claims abstract description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 30
- 238000005273 aeration Methods 0.000 claims description 11
- 239000007789 gas Substances 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 238000002161 passivation Methods 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 5
- 239000010439 graphite Substances 0.000 claims description 5
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims 1
- 150000001768 cations Chemical class 0.000 claims 1
- 238000005086 pumping Methods 0.000 claims 1
- 239000010405 anode material Substances 0.000 abstract description 10
- -1 hydroxide ions Chemical class 0.000 abstract description 5
- 238000004065 wastewater treatment Methods 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 abstract description 3
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract description 2
- 238000002474 experimental method Methods 0.000 description 18
- 238000011049 filling Methods 0.000 description 15
- 239000007772 electrode material Substances 0.000 description 14
- 239000010802 sludge Substances 0.000 description 14
- 239000000463 material Substances 0.000 description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 230000029087 digestion Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000010865 sewage Substances 0.000 description 6
- 229910001220 stainless steel Inorganic materials 0.000 description 6
- 239000010935 stainless steel Substances 0.000 description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 5
- 239000011324 bead Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- 239000003610 charcoal Substances 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000002028 Biomass Substances 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 241000370738 Chlorion Species 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- 238000005276 aerator Methods 0.000 description 2
- 150000001450 anions Chemical class 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000010406 cathode material Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 101100258233 Caenorhabditis elegans sun-1 gene Proteins 0.000 description 1
- 230000005526 G1 to G0 transition Effects 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 241000589651 Zoogloea Species 0.000 description 1
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000002848 electrochemical method Methods 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000002906 microbiologic effect Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000004506 ultrasonic cleaning Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/02—Preparation, purification or separation of ammonia
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/14—NH3-N
Abstract
The invention discloses a kind of three-diemsnional electrode coupling microorganism electrolysis cell processing ammonia nitrogen waste water recycling ammonia devices, including columned cathode chamber, are arranged with columned anode chamber outside cathode chamber, are separated between cathode chamber and anode chamber by cation-exchange membrane；Anode chamber bottom is equipped with electrolytic cell stent；Anode chamber's bottom has anode chamber's mud discharging mouth and convex circular arch shape water inlet.The present invention couples microorganism electrolysis cell using three-diemsnional electrode, carries out the recycling of ammonia in nitrogen-containing wastewater.By way of being aerated in cathode, a large amount of hydroxide ions are obtained, and by NH4 +Separation, economical and efficient are recycled in the form of ammonia.In addition it is driven in muddy water and recycled by pump, using convex circular arch shape water inlet and its equally distributed several aperture in top, the contacting efficiency of anode material, three dimensional particles and muddy water is increased, conducive to biofilm early period and later stage wastewater treatment.
Description
Technical field
The invention belongs to offal treatment field more particularly to a kind of three-diemsnional electrode coupling microorganism electrolysis cell processing ammonia nitrogens
Sewage treatment ammonia device.
Background technology
Anaerobic digestion process compares aerobic digestion, is not required to disinfect repeatedly, saves energy consumption, simplifies production technology, is mesh
One rational means of comparison of preceding Treatment of Sludge.But sludge press filtration waste water still has high COD and high ammonia after anaerobic digestion
The characteristics of nitrogen, C/N belong to typical high ammonia-nitrogen wastewater than numerous imbalances.At present industrial anaerobic digestion waste water mostly without
Processing direct emission is handled with stripping pond, and ammonia nitrogen recovering effect is unsatisfactory.
Microorganism electrolysis cell (MEC) is the technology that a kind of biology is combined with electrochemistry, can realize that low-voltage recycles target
Product.Compared to single Physical, chemical method, Biological Treatment of Wastewater, MEC functions are more extensive, can handle many biographies
The complicated organic matter that system method can not be handled, treatment effect are more notable.MEC is mainly used to synthesize hydrogen etc. with using valency at present
The compound of value recycles waste water metal ions, handles nitrate nitrogen, complicated organic matter etc. of degrading.Microorganism electrolysis cell is used for
The Ammonia recovery country is rarely reported, and foreign countries have scholar just to be studied.Microorganism electrolysis cell has various configurations and material, Zhong Duozhuan
Family scholar is dedicated to the optimization of electrolyser construction and material, improves reaction efficiency, increases economic value.This sets for this experimental provision
Meter provides preferable reference.
Three-diemsnional electrode is a kind of novel electrochemical reactor, is called granule electrode or bed electrode.It is in conventional two-dimensional
Electrolyzer electric interpolar loads granular or other clastic working electrode materials, and electric current is supplied by main electrode, makes the work electricity of filling
The electrification of pole material surface, becomes new electrode, so as to considerably increase working electrode surface area, reduce reactant migration away from
From improving electrolytic efficiency.Based on Three-dimensional Electrode Method has the research of long period in the inorganic wastewater processing of metal ion, uses
Grew up in recent years in processing organic wastewater.
Invention content
It to be returned to solve the above problems, the invention discloses a kind of three-diemsnional electrode coupling microorganism electrolysis cell processing ammonia nitrogen waste waters
Receive ammonia device.This practicality obtains a large amount of hydroxide ions by way of being aerated in cathode, and by NH4 +Divided in the form of ammonia
From economical and efficient.In addition it is driven in muddy water and recycled by pump, it is equally distributed several using convex circular arch shape water inlet and its top
Aperture increases the contacting efficiency of anode material, three dimensional particles and muddy water, conducive to biofilm early period and later stage wastewater treatment.
The present invention couples microorganism electrolysis cell using three-diemsnional electrode, realizes the recycling of ammonia in ammonia nitrogen waste water.
To achieve the above object, the technical scheme is that：
A kind of three-diemsnional electrode coupling microorganism electrolysis cell processing ammonia nitrogen waste water recycling ammonia device, including columned cathode
Room, cathode chamber are arranged with columned anode chamber 1 outside, are separated between cathode chamber and anode chamber 1 by cation-exchange membrane 12；Sun
1 bottom of pole room is equipped with electrolytic cell stent 2；1 top side arm of anode chamber is formed with anode chamber's water outlet 9, and bottom has convex
Several perforation holes or afflux exit portal 14,1 internal upper part of anode chamber is distributed on convex circular arch shape water inlet 3 in circular arch shape water inlet 3
It is fixed with ring network 16；Convex 3 plug connection of circular arch shape water inlet has transparent pipe 15, and transparent pipe 15 passes through pump 6 and ring network 16
1 inside of anode chamber of top connects；Anode chamber 1 is top formed anode chamber gas outlet 4；Cathode chamber is top formed to have cathode chamber to go out
Gas port 11；Cathode chamber bottom has cathode water in-out port 13；Cathode electrode 5 is fixed in cathode chamber, 1 inner wall of anode chamber is fixed
There is anode electrode 17, filled with particle formula three-diemsnional electrode as third electrode between anode electrode 17 and cation-exchange membrane 12；
Anode electrode 17 and cathode electrode 5 are electrically connected with additional power source 10.
Further to improve, the anode electrode 17 is made of graphite carbon felt.
Further to improve, the cathode electrode 5 is made of passivation stainless (steel) wire.
Further to improve, it is organic that the anode electrode 17 is fixed on a diameter of 10cm, the closing cylinder of a height of 15cm
In glass tank.
Further to improve, the cathode chamber bottom is communicated with air pump 19 by aeration opening 18.
Further to improve, anode chamber bottom is equipped with mud discharging mouth 20.
Further to improve, pump 6 is connected by valve 7 with anode chamber 1.
Advantages of the present invention：
(1) microorganism electrolysis cell is coupled with three-diemsnional electrode, carries out the recycling of ammonia in ammonia nitrogen waste water, realize nitrogen member in waste water
The recycling of element, and greatly improves organic efficiency, contributes to the research in terms of waste water treatment process and energy regeneration.
(2) by way of being aerated in cathode, a large amount of hydroxide ions are obtained, ammonium ion in the form of ammonia is recycled and is divided
From economical and efficient.
(3) this experimental provision designs gained after reading a large amount of papers by this group membership, and filling third dimension electrode material is lives
Property charcoal and a small amount of bead.It is inspired by three-dimensional concept, present apparatus main electrode is also using the big three-dimensional shape electrode in material gap itself
Material, anode material use graphite carbon felt, and cathode uses stainless (steel) wire, conducive to gas evolution.
(4) present apparatus utilizes convex circular arch shape water inlet and Qi Ding by the way that cell inlet configuration and feeding manner is transformed
Portion is evenly distributed with several afflux exit portals, is come into full contact with conducive to muddy water and electrode material, convenient for long film and wastewater treatment.
Description of the drawings
Fig. 1 is the dimensional structure diagram of the present invention；
Fig. 2 is the front cross-sectional structure diagram of the present invention
Fig. 3 is the process for using figure of apparatus of the present invention；
Fig. 4 is the structure diagram of embodiment 2.
Specific embodiment
Embodiment 1
Structure of the present invention is as illustrated in fig. 1 and 2：
1. microorganism electrolysis cell yin, yang pole room
Intend the electrolytic cell designed by the experiment carried out and be divided into cathode chamber and anode chamber.
Anode chamber is passed through pending anaerobic digestion waste water with intermittent.Cathode is passed through 0.1mol/L NaSO4 conducts early period
Electrolyte is passed through air by aerator to cathode, and oxygen will obtain electronics in cathode and become hydroxyl, become main electrolysis
Matter, under the driving of additional power source, ammonium ion will enter cathode combination hydroxyl generation ammonia by cation-exchange membrane.It should
Cathode of electrolytic tank room is cylindrical shape, and anode chamber is coaxial circle ring column shape, coaxially contour with cathode chamber, is enclosed in outside cathode
Side.It is separated between yin, yang pole room by amberplex (green conjunction environmental protection company, CMI-7000 cation-exchange membranes).It is entire real
An experiment device generally basal diameter is about 10cm, the organic glass closing cylinder tubbiness of high about 15cm.
Present apparatus anode main electrode will be inoculated with electroactive bacterium, and larger electrode surface area adheres to conducive to microorganism, therefore selects
It selects graphite carbon felt and does anode material, which has the characteristics such as porosity is big, and resistance is low, low cost, and plasticity is good.It is wherein porous
Surface can for chemistry of micro-organisms react vast surface area be provided, so as to improve reaction efficiency.And good plasticity causes
The material can fashion into variously-shaped under external force, it is possible to according to needed for experiment, anode material be cut into about
32cm, the rectangle of wide about 15cm, then set cylindrical side is rolled into, it is close to cylindrical inner wall.Using granular activated carbon as filling electricity
Pole material.Granular activated carbon good conductivity, easily polarization, in addition, granular activated carbon biological adhesiveness is good, are conducive to microorganism at it
The growth on surface maintains to possess more biomass in reactor.When single granular activated carbon is as filling electrode material, easily
Short circuit current is formed, reduces the current efficiency of reactor, therefore, this reactor is using granular activated carbon and the mixture of bead
As filling electrode material.Packed height is 5cm, filling proportion 10:1 (volume ratio), wherein 1~2mm of bead grain size, it is living
1~1.2mm of property charcoal grain size.Reactor anode and cathode connect, and pass through ammeter with the positive and negative anodes of D.C. regulated power supply respectively
Monitoring current changes at any time.
Anode chamber designs four water inlets, a water outlet, a mud discharging mouth 20 and a gas outlet altogether, is used at gas outlet
Collect airbag and collect gas.Water inlet is arranged to convex dome-shaped, bottom surface radius 1cm, high 1cm with reference to shower model.Facilitate dispersion
Water distribution.With reference to water sprayer model, select to open equally distributed exit portal on circular arch.(respectively with horizontal direction in 5 °,
30 °, 60 °, 85 °, 90 °), schematic diagram is seen in the direction of nearly five exit portals, takes into account two dimensions, fully mixed convenient for muddy water and particle
It closes.Exit portal diameter 0.8mm facilitates to form jet stream and three dimensional particles is avoided to block simultaneously.It can be by adjusting the flow lift of pump
Determine the optimal parameter of the pump conducive to microorganism electrolysis cell operation.Both sides symmetric position mouthpiece near anode top,
Connect the water inlet of small-power pump.Apart from upper top about 5cm places, arrange that the ring network of about 20 mesh covers anode region, it can be with
Three dimensional particles, which are pumped, when cycle is drawn water including avoiding results in blockage.
Choose passivation stainless (steel) wire and do cathode material, shape is radius 1cm, high about 10cm it is rodlike.Stainless (steel) wire is
Current most common nickeliferous metal material, cheap and performance are stablized, and electro-chemical activity is same surface area plane stainless steel
3 times or more.But when, there are when aggressivity anion (such as chlorion), stainless steel can occur in the cathode chamber where stainless steel
Spot corrosion, therefore this group membership need to be used for nitric acid Passivation Treatment before stainless (steel) wire is used to make cathode.
If not considering the thickness of amberplex, cathode chamber in basal diameter is about 4cm, the cylindrical shape of high about 15cm,
The feed inlet and outlet of an a diameter of 1.2cm is done in cathode chamber lower bottom part, by cathode chamber upper electrode, going out for equivalent specifications is set
Gas port, cathode aerogenesis are ammonia, and cathode outlet is passed through outside electrolytic cell in deionized water solution, and ammonia is close in the form of a hydration ammonia
Envelope preserves.
In startup stage, (startup stage is divided into three parts：Biofilm phase, domestication and stationary phase.) feed inlet takes over connection
The water outlet of pump, intermittently starting form the interior cycle of sludge, and muddy water mixing, entire anode material and three-dimensional particle filled composite can
With sludge fully and more smoothly contact, convenient for biofilm, while be also uniformly mixed conducive to medicament, sludge facilitated to grow.Sludge
It is come into full contact with anode material and three-diemsnional electrode material, convenient for forming biomembrane.
Experimental stage, the valve on shutoff device side wall water pipe.The mouth of a river will be pumped into change to pending waste water, pump out the mouth of a river
Still pass through throat-fed.After each charging or dosing, the primary interior cycle for scheduling to last 10min is all carried out, convenient for mixing.Stop
In hydraulic detention time after only recycling, flow keeps Relative steady-state in device.Furthermore, it is contemplated that anode microbiological treatment is organic
The gases such as carbon dioxide can be generated during object, are equilibrium pressure therefore in one collection airbag of top setting.Water after processed from
Top water outlet discharge.
2. microorganism electrolysis cell electrode
For more efficiently treated sewage and ammonia is recycled, therefore combines to replace traditional two dimension using two kinds of form three-diemsnional electrodes
Electrode.
Present apparatus anode main electrode will be inoculated with electroactive bacterium, and larger electrode surface area adheres to conducive to microorganism, therefore selects
It selects graphite carbon felt and does anode material, which has the characteristics such as porosity is big, and resistance is low, low cost, and plasticity is good.It is wherein porous
Surface can for chemistry of micro-organisms react vast surface area be provided, so as to improve reaction efficiency.And good plasticity causes
The material can fashion into variously-shaped under external force, it is possible to according to needed for experiment, anode material be cut into about
32cm, the rectangle of wide about 15cm, then set cylindrical side is rolled into, it is close to cylindrical inner wall.
The biomembrane of particle surface can make particle insulated from each other, reduce the generation of short circuit current.The use of this reactor
Grain activated carbon is as filling electrode material.Granular activated carbon good conductivity, easily polarization, in addition, granular activated carbon biological adhesiveness
It is good, be conducive to growth of the microorganism on its surface, maintain to possess more biomass in reactor.Single granular activated carbon is made
During for filling electrode material, short circuit current is easily formed, reduces the current efficiency of reactor, therefore, this reactor is lived using particle
Property charcoal and bead mixture as filling electrode material.Packed height is 5cm, filling proportion 10:1 (volume ratio),
Middle bead grain size 1-2mm, 1~1.2mm of activated carbon particle size.Reactor anode and cathode are positive and negative with D.C. regulated power supply respectively
Pole connects, and passes through ammeter monitoring current variation at any time.
Reactor uses periodic running, and reactor is equipped with anode to the interior reflux of anode, and muddy water is sufficiently mixed, convenient for dirt
Mud is grown.Meanwhile entire anode material and three-dimensional particle filled composite can more contact fully and smoothly with sludge, convenient for early period
Biofilm and post-processing.
Choose passivation stainless (steel) wire and do cathode material, shape is radius 1cm, high about 10cm it is rodlike.Stainless (steel) wire is
Current most common nickeliferous metal material, cheap and performance are stablized, and electro-chemical activity is same surface area plane stainless steel
3 times or more.But when, there are when aggressivity anion (such as chlorion), stainless steel can occur in the cathode chamber where stainless steel
Spot corrosion, therefore this group membership need to be used for nitric acid Passivation Treatment before stainless (steel) wire is used to make cathode.
3. microorganism electrolysis cell additional power source
Power supply is the power of electrochemical method processing waste water, and due to the particular configuration of this experiment electrolytic cell, yin, yang electrode is not
It can exchange, therefore take the power supply mode of DC voltage.
4. microorganism electrolysis cell cation-exchange membrane
Amberplex can realize that electrolyte is molten as the functional material with Selective Separation characteristic in electrolytic cell
Ion isolation in liquid.Amberplex needed for this experiment is cation-exchange membrane, and specification is long 26cm, width 15cm.
5. aerator
Since cathode aeration can both increase cathode hydroxyl concentration, increase electrolyte concentration, be conducive to ammonium root and be converted into
Ammonia.On the other hand aeration is also beneficial to ammonia stripping, therefore sets the present apparatus.
The culture and domestication of two, microorganisms
The anaerobic sludge of about 3L is taken out in laboratory, observes its form.Initial stage of culture with it is diluted digestion waste liquid into
Row culture, changes a culture solution in every two days, observes its settleability and flocculation situation.Daily measure ammonium ion concentration simultaneously, pH,
The indexs such as COD.After one section of domestication temporally, when flocculation is good, zoogloea relatively disperses, and sludge concentration reaches certain value, and COD's goes
When reaching higher level except rate, the completion of domestication is indicated.Bacterium liquid after domestication is added in into the domestication that is powered in electrolytic cell, absorption
Proliferation forms biomembrane.
Three, which probe into Ammonia recovery variable, influences experiment
(1) trial operation reactor in the quiescent state
Ultrasonic cleaning electrode used therein material is used before experiment.Experiment takes intermittent flow to operate, and whole device is equal before operation
About 2min high pure nitrogens are passed through with the oxygen in removing system.System running is constant under the conditions of 30 DEG C.Treat two periods of operation
After carry out experiment of single factor.
(2) experiment of single factor
By controlling variable using experiments of single factor, research different feeds nitrogen concentration, pH, applied voltage, HRT, difference
The influence of electrode material loading and aeration time to microorganism electrolysis cell recycling ammonia three-dimensional in this experiment.
A. sludge quantity is tested
The difference of sludge quantity can greatly influence Ammonia recovery rate in this experiment, while sludge concentration is excessively high to make
Into the blockage problem of battery, for seek it is specific influence and find efficiently unobstructed reaction density, therefore set this control group into
Row is probed into.Isometric grade for pH are taken, extension rate is respectively 1, and 2,3 sludge is placed in the anode compartment, the electrode of the quality such as filling
Material applies identical constant voltage and aeration rate, using identical HRT, is tested.The ammonia yield of each group is measured,
The removal rate of COD, current density, interpretation of records data.
B.pH is tested
Anode chamber pH can influence microorganism growth, influence hydrogen ion concentration etc., therefore set this Experimental Research optimal pH.It takes
Concentration, in equal volume, pH value are respectively 5,5.5,6,6.5,7,7.5,8 sewage, are placed in anode chamber.The electrode material of the quality such as filling
Material.Control external voltage, aeration rate, HRT and other Variable Factors identical.It measures in the case of different PH, ammonia yield,
The removal rate of COD, current density, interpretation of records data.
C. different applied voltage experiments
Increase voltage is conducive to increase current density, accelerates ammonia generating rate.But in order to avoid anode hydrolyzes aerogenesis,
Therefore control voltage is in hydrolysis below voltage 1.23v.To find best energy efficiency, therefore this control group is set.Take isoconcentration etc.
Volume waits the sewage of pH to be placed in each anode chamber, controls the electrode material of the quality such as equal strength aeration rate, filling, and use is identical
HRT, do not apply 0.7,0.8V, 0.9v in outer portion, the constant voltage of 1.0v, 1.2V are tested.Measure the production of ammonia
Amount, the removal rate of COD, current density, interpretation of records data.
D. Different electrodes material loading level is tested
Particle-filled amount is one highly important variable of this experiment.One group of blank control group is set, for probing into comparison
The efficiency of two-dimensional electrode and three-diemsnional electrode.The mass particle of graded series is set simultaneously, particle filled composite is conducive to electric current conductance more,
But excessive particle filled composite may cause resistance to increase, and very few wait of single water inlet influences.It takes isoconcentration isometric, waits the dirt of pH
Water is placed in each anode chamber, and packing volume height is respectively anode total height 1/3；3/5；5/8 three dimensional particles.Control external electrical
Pressure, HRT, aeration rate and other Variable Factors are identical.It is tested, measures the yield of ammonia, the removal rate of COD, electric current is close
Degree, interpretation of records data.
E.HRT is tested
It takes isoconcentration isometric, the sewage of pH is waited to be placed in the electrode material of the quality such as each anode chamber, filling, using identical
Constant applied voltage controls equal strength aeration rate.Series HRT is set as 0.25d, 0.5d, 1d, 1.5d, 2d are tested.It surveys
Determine the ammonia yield of each group experiment, COD removal rates and current density, interpretation of records data.
F. aeration rate is tested
In electrochemical oxidation degradation process, it is passed through compressed air and plays an important role to Ammonia recovery efficiency.One
It is to bring sufficient hydroxyl to cathode to be combined with ammonium root, the second is being conducive to stripping ammonia.Therefore this group is set to compare, also set
Put the blank control that an intake is 0.Set 0L/min, 0.1L/min, 0.2L/min, 0.3L/min, 0.4L/min, 0.5L/
Min gradient control groups, take isoconcentration isometric, and the sewage of pH is waited to be placed in the electrode material of the quality such as each anode chamber, filling, is used
Identical constant applied voltage and HRT.Measure the ammonia yield of each group experiment, COD removal rates and current density, interpretation of records number
According to.
Embodiment 2
As shown in figure 4, on the basis of embodiment 1, the exit portal of tubulose is revised as to poroid perforation hole.It is and convex
Circular arch shape water inlet 3 is four, and the convex circular arch shape water inlet 3 of each two connects a pump 6.It can be covered on circular arch when necessary
The rubber membrane of one layer of identical aperture position, i.e., only allow unilateral water inlet, effectively stops that sludge sinks as being deposited in circular arch, prevents from blocking up
Plug.
Although the embodiments of the present invention have been disclosed as above, but it is not restricted to listed fortune in specification and embodiment
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily real
Now other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is not limited to
Specific details and the legend herein shown with description.
Claims (5)
1. a kind of three-diemsnional electrode coupling microorganism electrolysis cell processing ammonia nitrogen waste water recycling ammonia device, including columned cathode
Room, which is characterized in that be arranged with columned anode chamber (1) outside cathode chamber, handed between cathode chamber and anode chamber (1) by cation
Film (12) is changed to separate；Anode chamber (1) bottom is equipped with electrolytic cell stent (2)；Anode chamber (1) upper portion side wall is formed with anode chamber
Water outlet (9), bottom have convex circular arch shape water inlet (3), several perforation holes are distributed on convex circular arch shape water inlet (3)
Or afflux exit portal (14), anode chamber (1) internal upper part are fixed with ring network (16)；Convex circular arch shape water inlet (3) plug connection
There is transparent pipe (15), transparent pipe (15) is connected by pumping inside (6) and the anode chamber (1) above ring network (16)；Anode chamber (1)
It is top formed to have anode chamber gas outlet (4)；Cathode chamber is top formed cathode chamber gas outlet (11)；Cathode chamber bottom has the moon
Pole intake-outlet (13)；Cathode electrode (5) is fixed in cathode chamber, anode chamber (1) inner wall is fixed with anode electrode (17), anode
Filled with particle formula three-diemsnional electrode as third electrode between electrode (17) and cation-exchange membrane (12)；Anode electrode (17) and
Cathode electrode (5) is electrically connected with additional power source (10).
2. three-diemsnional electrode coupling microorganism electrolysis cell processing ammonia nitrogen waste water recycling ammonia device as described in claim 1, special
Sign is that the anode electrode (17) is made of graphite carbon felt.
3. three-diemsnional electrode coupling microorganism electrolysis cell processing ammonia nitrogen waste water recycling ammonia device as described in claim 1, special
Sign is that the cathode electrode (5) is made of passivation stainless (steel) wire.
4. three-diemsnional electrode coupling microorganism electrolysis cell processing ammonia nitrogen waste water recycling ammonia device as described in claim 1, special
Sign is that the cathode chamber bottom is communicated with air pump by aeration opening (18).
5. three-diemsnional electrode coupling microorganism electrolysis cell processing ammonia nitrogen waste water recycling ammonia device as described in claim 1, special
Sign is that pump (6) is connected by valve (7) with anode chamber (1).
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| CN112499754A (en) * | 2020-12-01 | 2021-03-16 | 张家港市五湖新材料技术开发有限公司 | Nitrogenous wastewater treatment system |
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