CN106348539A - Method and device for removing nitrate from water - Google Patents
Method and device for removing nitrate from water Download PDFInfo
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- CN106348539A CN106348539A CN201610922888.3A CN201610922888A CN106348539A CN 106348539 A CN106348539 A CN 106348539A CN 201610922888 A CN201610922888 A CN 201610922888A CN 106348539 A CN106348539 A CN 106348539A
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- sulfur
- water
- autotrophic denitrification
- unit
- nitrate
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 147
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 229910002651 NO3 Inorganic materials 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 48
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 100
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 92
- 239000011593 sulfur Substances 0.000 claims abstract description 92
- 230000001651 autotrophic effect Effects 0.000 claims abstract description 66
- 238000000909 electrodialysis Methods 0.000 claims abstract description 52
- 230000008569 process Effects 0.000 claims description 21
- 238000004659 sterilization and disinfection Methods 0.000 claims description 17
- 239000002245 particle Substances 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 8
- 206010016807 Fluid retention Diseases 0.000 claims description 6
- 239000005864 Sulphur Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 239000008187 granular material Substances 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 abstract description 38
- 230000000694 effects Effects 0.000 abstract description 11
- 239000006227 byproduct Substances 0.000 abstract description 8
- 230000007547 defect Effects 0.000 abstract description 2
- 230000002829 reductive effect Effects 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000000502 dialysis Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003673 groundwater Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 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 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 239000003651 drinking water Substances 0.000 description 2
- 235000020188 drinking water Nutrition 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 108010061951 Methemoglobin Proteins 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 231100000357 carcinogen Toxicity 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000002384 drinking water standard Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- GQPLMRYTRLFLPF-UHFFFAOYSA-N nitrous oxide Inorganic materials [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000009466 transformation Effects 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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4693—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- 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
-
- 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
- C02F2201/002—Construction details of the apparatus
- C02F2201/007—Modular design
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- 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
Abstract
The invention relates to a method for removing nitrate from water. The sulfur autotrophic denitrification is utilized to remove nitrate, and meanwhile, the electrodialysis effect is utilized to remove the sulfate by-product generated through sulfur autotrophic denitrification, so that the defect of low sulfur autotrophic denitrification efficiency can be overcome, the operation cost of the electrodialysis water treatment can be effectively reduced, the method is economical and efficient and the quality of the discharged water can be guaranteed.
Description
Technical field
The present invention relates to water-treatment technology field, more particularly, to a kind of method and device removing nitrate in eliminating water.
Background technology
China causes groundwater azotate pollution serious due to agricultural and industrial pollution, the wherein China such as Beijing, Tianjin, Hebei
Backlands area is the most prominent.Nitrate is that it can generate nitrous through nitrate reduction enzyme effect in human body to the key of harm
Hydrochlorate, and nitrite can make the low Ferri-hemoglobin of normal oxygen carrying in blood be oxidized to metahemoglobin, thus lose and take
Oxygen ability and cause histanoxia, still a kind of carcinogen simultaneously, serious threat is constituted to health.Therefore develop high
The economic Nitrate Removal Methods of Groundwater of effect is the research and development focus of drink water purifying technical field all the time.
As conventional art, chemical method is thus removing nitrate using the nitrate in certain reducing agent reductive water,
The more reducing agent of research has metal fe at present0, ferrous irons fe2+Deng, because the control ratio of reaction condition is big compared with strict, energy consumption,
Produce concentrated solution, by-product easily causes the secondary pollutions such as soda acid.
The biotechnology such as heterotrophism and autotroph denitrification method overcomes that conventional art energy consumption is big, efficiency is low, secondary pollution
The shortcomings of, there is reaction condition gently (normal temperature and pressure), equipment is simple and convenient to operate, operating cost is low, efficiency high, environment friend
The advantages of good.But sulfur autotrophic denitrification method, under cryogenic, nitric efficiency is low, and in high concentration nitrate (40mgn/
More than l) under the conditions of, it is easily caused the sulfate by-products concentration over-standard of generation, cause secondary pollution.These defects make sulfur certainly
The large-scale popularization and application of foster denitrification method are restricted.
Physical-chemical process mainly has distillation, membrane separation process (reverse osmosiss, electrodialysis etc.), ion exchange, electrolysis etc., this
Although a little method desalting effects are good, stable, high degree of automation, wherein electrodialysis are not affected by temperature etc., and power consumption is low,
The method haves such problems as that processing cost height, pre-treatment have high demands.
Cn1403389a is disclosed a kind of sulfur autotrophic denitrification and is combined with electrochemical autotrophic denitrification in removing drinking water
The method of nitrate nitrogen, up to more than 98%, in water after process, nitrate nitrogen content is less than 0.01mg/l, wherein hydrogen to nitric efficiency
For electron donor, it is to avoid secondary pollution, but, dissolubility in water for the hydrogen is relatively low, cause its utilization rate low, and there is safety
Hidden danger, the secondary pollution problem of water outlet sulfate radical is not also improved.
Cn102259978a discloses to report and a kind of goes the reactor of nitrate and method in eliminating water, using soft biological
Carrier makes biomembrane be attached near negative electrode, by adding additional carbon, constructs the collaborative denitrification system of autotrophy heterotrophism, and
Carbon-nitrogen ratio is fallen below 0.5～3, and obtains preferable removal effect.But electrochemical action part and microorganism do not separate, too high
Electric current can affect the activity of microorganism, the yield of hydrogen thus limited, effect in reaction system for the autotrophic denitrification also with
Be restricted, autotrophic denitrification effect insufficient, heterotrophism produce co2Still there is waste, in water the removal efficiency of nitrate is relatively
Low.
Content of the invention
In view of problems of the prior art, an object of the present invention is to provide a kind of removes nitrate in eliminating water
Method.
The method of the invention includes: the liquid that raw water is obtained after over cure autotrophic denitrification carries out electrodialysis process.
For nitrate in groundwater, by the effect of sulfur autotrophic denitrification by nitrate removal, utilize electrodialysis to make simultaneously
With preferentially removing so in eliminating water4 2-Contour charge anions, remove nitrate further, reduce sulfur section process load, certainly by sulfur simultaneously
The sulfate by-products that foster denitrification produces remove, Balance Water Quality, using the association of biological sulfur autotrophic denitrification and electrodialysis denitration
Same-action, reaches and can effectively remove high concentration nitrate, can control sulfate by-products at normal temperatures again.By anti-for sulfur autotrophy nitre
Change carries out system with electrodialysis and is combined, and Sulfur-Vapor of Lower Temperature autotrophic denitrification efficiency not only can be overcome not enough, and can effectively reduce electricity
Dialysis water process operating cost, cost-effective guarantee water safety.
The electron donor of described sulfur autotrophic denitrification includes elemental sulfur.
Preferably, described elemental sulfur includes sulfur.
Preferably, the particle diameter of described sulfur is 0.1～10mm, preferably 0.3～5mm, further preferred 2～3mm.
Preferably, the process of described sulfur autotrophic denitrification includes: by simple substance sulphur granule as filler, is filled in sulfur autotrophy post
In, carry out autotrophic denitrification.
Preferably, during described autotrophic denitrification, the time of staying in sulfur autotrophy post for the raw water is 0.5～5h, for example
0.6h, 1h, 1.5h, 1.8h, 2h, 3h, 4h or 4.5h etc., preferably 1～2h, further preferred 1.5h.
By the use of sulphur simple substance as electron donor, nitrate carries out autotrophic denitrification as electron acceptor, by nitrate transformation
For harmless nitrogen；When sulfur particle diameter is more than 10mm, its specific surface area is little, the electron donor in the sulfur autotrophy post of unit volume
Less, the speed of sulfur autotrophic denitrification removal nitrate and efficiency are all low, when sulfur particle diameter is less than 0.1mm, the sulfur of small particle
Granule increases the remove impurity burden of subsequent technique, and is difficult to prepare.If the time of staying in sulfur autotrophy post for the raw water is less than 0.5h, no
Can fully react, increase electrodialytic burden, if the time of staying in sulfur autotrophy post for the raw water is more than 5h, it is unnecessary to cause
The wasting of resources, when being 0.5～5h the time of staying in sulfur autotrophy post for the raw water, you can ensures that sulfur autotrophic denitrification is complete.
Electrodialytic running voltage of the present invention be 2～60v, such as 3v, 5v, 8v, 11v, 16v, 20v, 24v, 26v,
29v, 32v, 34v, 36v, 39v, 43v, 47v, 51v or 59v etc., preferably 10～40v, further preferred 25～35v.
Under different voltages, electrodialysis are different to the removal effect of nitrate anion, sulfate radical.Voltage be higher than 60v when, nitrate anion and
The clearance of sulfate radical is all higher than 50%, but high energy consumption, it is added significantly to process costs.Voltage be less than 2v when, nitrate anion and
The clearance of sulfate radical is less than 20% it is impossible to give full play to electrodialytic effect, and effluent characteristics are low.
Raw water nitrate concentration ＞ 35mgn/l of the present invention, such as 36mgn/l, 37mgn/l, 39mgn/l, 42mgn/l,
44mgn/l, 46mgn/l, 48mgn/l, 50mgn/l, 52mgn/l, 54mgn/l, 56mgn/l, 59mgn/l or 62mgn/l etc., excellent
Described raw water nitrate concentration is selected to be 40～60mgn/l, further preferred 45～55mgn/l.
Sulfur autotrophic denitrification method, under the conditions of high concentration nitrate (more than 35mgn/l), is easily caused the sulfate of generation
By-product concentration is exceeded, and the method for the invention can effectively improve the water quality adaptability of integrated artistic.
Sulfur autotrophic denitrification of the present invention and described electrodialysis water outlet mixing proportion are 0: 1～1: 1, preferably 1: 3～2:
3, further preferred 1: 2.
If water outlet all be from electrodialysis although can guarantee that nitrate and sulfate concentration all not exceeded, but electrodialysis
Operating cost caused by water process can be very high；Sulfate is the by-product of sulfur autotrophic denitrification, if sulfur autotrophic denitrification and electricity
Dialysis water outlet mixing proportion is more than 1: 1 although process costs reduce, but the sulfate generating is easily exceeded, the anti-nitre of sulfur autotrophy
When change and electrodialysis water outlet Blend proportion are 0: 1～1: 1, can cost-effectively ensure water safety.
The second object of the present invention is to provide a kind of device removing nitrate in eliminating water, comprising: sulfur autotrophic denitrification unit,
It is arranged at the electrodialysis cell in described sulfur autotrophic denitrification unit downstream.
Preferably, the described device removing nitrate in eliminating water is used for removing nitric acid in eliminating water as described in one of the object of the invention
The method of salt.
Filter element is set between described sulfur autotrophic denitrification unit and described electrodialysis cell.
Preferably, it is provided with the water-retention unit for storing raw water before described sulfur autotrophic denitrification unit.
Described sulfur autotrophic denitrification unit includes sulfur autotrophy post, is arranged at the water inlet of described sulfur autotrophy column bottom, is used for
The input of raw water, and it is arranged at the overfall of described sulfur autotrophy column top, defeated for the liquid after the process of sulfur autotrophic denitrification
Go out.
Described device includes: the water-retention unit that is sequentially connected, sulfur autotrophic denitrification unit, filter element, electrodialysis list
Unit and disinfection unit.
The outlet of described water-retention unit is connected with the water inlet of sulfur autotrophic denitrification unit sulfur autotrophy column bottom, sulfur autotrophy
The overfall of denitrification unit sulfur autotrophy column top is connected with the water inlet of filter element, filter element outlet respectively at electricity
Dialysis unit water inlet and disinfection unit first water inlet connect, and electrodialysis cell outlet is with disinfection unit second water inlet even
Connect, disinfection unit is provided with outlet.
Described disinfection unit first water inlet and described disinfection unit second water inlet are identical or different.
First valve, described filter element water outlet are set between described filter element outlet and electrodialysis cell water inlet
Between mouth and disinfection unit first water inlet, the second valve and second flowmeter are set；Described electrodialysis cell outlet and sterilization
Setting the 3rd valve and the 3rd effusion meter between unit second water inlet.
Compared with prior art, the present invention at least has the advantages that
By integrated bio sulfur autotrophic denitrification and electrodialysis denitration technology, form efficient, economic, stable drinking water and take off
Nitre COMBINED PROCESS, overcomes the problem that biological denitrification nitric acid salt load is low, water outlet sulfate is easily exceeded.By to sulfur
The operation parameter optimizations such as sulphur particle diameter, the time of staying, electrodialysis running voltage, water outlet Blend proportion, cost-effectively improve overall work
The water quality adaptability of skill, water treatment efficiency and stable water outlet, can process the raw water of nitrate concentration ＞ 35mgn/l.
Brief description
Fig. 1 is the apparatus structure schematic diagram removing nitrate in eliminating water provided in an embodiment of the present invention；
In figure labelling is illustrated as: 1- feed-tank, 2- sulfur autotrophic denitrification post, 3- sand filter, 4- electrodialysis, 5- effusion meter,
6- water pump, 7- valve, 8- sterilization
The present invention is described in more detail below.But following examples is only the simple example of the present invention, not generation
Table or restriction the scope of the present invention, protection scope of the present invention is defined by claims.
Specific embodiment
Further illustrate technical scheme below in conjunction with the accompanying drawings and by specific embodiment.
Technological process:
1) raw water enters regulating tank, starts biological denitrification process, described sulfur autotrophy cylinder profile by sulfur autotrophy post
For cylinder, sulfur autotrophy column volume is 1m3, internal active component is drusen.
2) sulfur autotrophy hydraulic detention time is determined according to the initial nitrate concentration of raw water, sulfur autotrophic denitrification water outlet enters many
Medium filter tank removes water-borne glue body particulate matter, carries out water quality for follow-up electrodialysis cell and prepares.
3) electrodialysis running voltage and hydraulic detention time, electrodialysis Duan Jinyi are determined according to sulfur autotrophic denitrification section water outlet
Step denitration, and remove biological denitrification by-product sulfate.
4) monitor last electrodialysis water outlet, determine sulfur autotrophic denitrification section and electrodialysis denitration section water outlet mixing proportion.
For the present invention is better described, readily appreciate technical scheme, the present invention's is typical but non-limiting
Embodiment is as follows:
Embodiment 1
Raw water nitrate concentration is 35mgn/l, sulfate concentration is 120mg/l, and the median particle diameter of drusen is 10mm,
Time of staying 0.75h in sulfur autotrophic denitrification post for the raw water, water outlet nitrate reaches 16.6mgn/l, and water outlet sulfate reaches
265mg/l, unlatching electrodialysis, voltage 5v, sulfur autotrophic denitrification section and electrodialysis section water outlet mixing proportion are 1: 1, water outlet nitric acid
Salt and sulfate concentration meet drinking water standard limit value (nitrate 20mgn/l, sulfate 250mg/l).
Embodiment 2
Raw water nitrate concentration is 43mgn/l, sulfate concentration is 120mg/l, and the median particle diameter of drusen is 1mm,
The time of staying in sulfur autotrophic denitrification post for the raw water is 1.5h, and water outlet nitrate reaches 12mgn/l, and water outlet sulfate reaches
285mg/l, unlatching electrodialysis, voltage 35v, sulfur autotrophic denitrification section and electrodialysis section water outlet mixing proportion are 1: 1, final outflow water
Nitrate reaches 8mgn/l, and final outflow water sulfate reaches 209mg/l.
Embodiment 3
Raw water nitrate concentration is 60mgn/l, sulfate concentration is 70mg/l, and the median particle diameter of drusen is 0.1mm,
The time of staying in sulfur autotrophic denitrification post for the raw water is 2.5h, and water outlet nitrate reaches 18.5mgn/l, and water outlet sulfate reaches
301mg/l, water outlet nitrate is exceeded；Open electrodialysis, voltage 25v, sulfur autotrophic denitrification section and electrodialysis section water outlet Blend proportion
Example is 1: 2, and final outflow water nitrate reaches 15.2mgn/l, and final outflow water sulfate reaches 235mg/l.
Embodiment 4
When raw water nitrate concentration is 45mgn/l, sulfate concentration is 80mg/l, and the median particle diameter of drusen is 2mm,
The time of staying in sulfur autotrophic denitrification post for the raw water is 2h, and water outlet nitrate reaches 12.6mgn/l, and water outlet sulfate reaches
290mg/l, water outlet sulfate is exceeded, opens electrodialysis, voltage 40v, sulfur autotrophic denitrification section and electrodialysis section water outlet Blend proportion
Example is 1: 1, and final outflow water nitrate reaches 9mgn/l, and final outflow water sulfate reaches 209mg/l.
Embodiment 5
When raw water nitrate concentration is 55mgn/l, sulfate concentration is 80mg/l, and the median particle diameter of drusen is
2.5mm, the time of staying in sulfur autotrophic denitrification post for the raw water is 3h, and water outlet nitrate reaches 15.5mgn/l, and water outlet sulfate reaches
To 370mg/l, water outlet sulfate is exceeded, opens electrodialysis, voltage 60v, and sulfur autotrophic denitrification section and electrodialysis section water outlet blend
Ratio is 1: 1, and final outflow water nitrate reaches 8.0mgn/l, and final outflow water sulfate reaches 235mg/l.
Embodiment 6
When raw water nitrate concentration is 45mgn/l, sulfate concentration be 60mg/l, the median particle diameter of drusen is 5mm,
The time of staying in sulfur autotrophic denitrification post for the raw water is 0.5h, and water outlet nitrate reaches 25mgn/l, and water outlet sulfate reaches
220mg/l, water outlet nitrate is exceeded, opens electrodialysis, voltage 2v, sulfur autotrophic denitrification section and electrodialysis section water outlet mixing proportion
For 1: 3, final outflow water nitrate reaches 18.6mgn/l, and final outflow water sulfate reaches 178mg/l.
Embodiment 7
Raw water nitrate concentration be 50mgn/l when, sulfate concentration be 50mg/l, the median particle diameter of drusen is
0.3mm, the time of staying in sulfur autotrophic denitrification post for the raw water is 5h, and water outlet nitrate reaches 14.5mgn/l, and water outlet sulfate reaches
To 320mg/l, water outlet sulfate is exceeded, opens electrodialysis, voltage 50v, and sulfur autotrophic denitrification section and electrodialysis section water outlet blend
Ratio is 2: 3, and final outflow water nitrate reaches 8.4mgn/l, and final outflow water sulfate reaches 230mg/l.
Embodiment 8
Raw water nitrate concentration be 36mgn/l when, sulfate concentration be 100mg/l, the median particle diameter of drusen is
3mm, the time of staying in sulfur autotrophic denitrification post for the raw water is 0.6h, and water outlet nitrate reaches 22mgn/l, and water outlet sulfate reaches
196mg/l, nitrate is exceeded, unlatching electrodialysis, voltage 30v, and sulfur autotrophic denitrification section and electrodialysis section water outlet mixing proportion are 2
: 3, final outflow water nitrate reaches 17.8mgn/l, and final outflow water sulfate reaches 180mg/l.
Applicant states, the present invention illustrates detailed process equipment and the technological process of the present invention by above-described embodiment,
But the invention is not limited in above-mentioned detailed process equipment and technological process, that is, do not mean that the present invention has to rely on above-mentioned detailed
Process equipment and technological process could be implemented.Person of ordinary skill in the field it will be clearly understood that any improvement in the present invention,
The interpolation of the equivalence replacement to each raw material of product of the present invention and auxiliary element, selection of concrete mode etc., all fall within the present invention's
Within the scope of protection domain and disclosure.
Claims (10)
1. a kind of method removing nitrate in eliminating water is it is characterised in that methods described includes:
The liquid that raw water is obtained after over cure autotrophic denitrification carries out electrodialysis process.
2. the method for claim 1 is it is characterised in that the electron donor of described sulfur autotrophic denitrification includes elemental sulfur；
Preferably, described elemental sulfur includes sulfur；
Preferably, the particle diameter of described sulfur is 0.1～10mm, preferably 0.3～5mm, further preferred 2～3mm.
Preferably, the process of described sulfur autotrophic denitrification includes: by simple substance sulphur granule as filler, it is filled in sulfur autotrophy post,
Carry out autotrophic denitrification；
Preferably, during described autotrophic denitrification, the time of staying in sulfur autotrophy post for the raw water is 0.5～5h, preferably 1～
2h, further preferred 1.5h.
3. method as claimed in claim 1 or 2 it is characterised in that described electrodialytic running voltage be 2～60v, preferably 10
～40v, further preferred 25～35v.
4. the method as described in any one of claims 1 to 3 is it is characterised in that described raw water nitrate concentration ＞ 35mgn/l,
Preferably described raw water nitrate concentration is 40～60mgn/l, further preferred 45～55mgn/l.
5. the method as described in any one of Claims 1 to 4 is it is characterised in that described sulfur autotrophic denitrification and described electrodialysis
Water outlet mixing proportion is 0: 1～1: 1, preferably 1: 3～2: 3, further preferred 1: 2.
6. a kind of device removing nitrate in eliminating water is it is characterised in that include: sulfur autotrophic denitrification unit, is arranged at described sulfur
The electrodialysis cell in autotrophic denitrification unit downstream；
Preferably, the described device removing nitrate in eliminating water is used for removing nitrate in eliminating water described in one of Claims 1 to 5
Method.
7. device as claimed in claim 6 it is characterised in that described sulfur autotrophic denitrification unit and described electrodialysis cell it
Between arrange filter element；
Preferably, it is provided with the water-retention unit for storing raw water before described sulfur autotrophic denitrification unit.
8. device as claimed in claims 6 or 7 is it is characterised in that described sulfur autotrophic denitrification unit includes sulfur autotrophy post, if
It is placed in the water inlet of described sulfur autotrophy column bottom, for the input of raw water, and be arranged at the overfall of described sulfur autotrophy column top,
The output of the liquid after processing for sulfur autotrophic denitrification.
9. the device as described in any one of claim 6～8 is it is characterised in that include:
Water-retention unit, sulfur autotrophic denitrification unit, filter element, electrodialysis cell and the disinfection unit being sequentially connected；
The outlet of described water-retention unit is connected with the water inlet of sulfur autotrophic denitrification unit sulfur autotrophy column bottom, the anti-nitre of sulfur autotrophy
Change unit sulfur autotrophy column top overfall be connected with the water inlet of filter element, filter element outlet respectively at electrodialysis
Unit water inlet and disinfection unit first water inlet connect, and electrodialysis cell outlet is connected with disinfection unit second water inlet,
Disinfection unit is provided with outlet；
Described disinfection unit first water inlet and described disinfection unit second water inlet are identical or different.
10. device as claimed in claim 9 is it is characterised in that described filter element outlet and electrodialysis cell water inlet
Between the first valve is set, between described filter element outlet and disinfection unit first water inlet, the second valve and second are set
Effusion meter；Setting the 3rd valve and the 3rd effusion meter between described electrodialysis cell outlet and disinfection unit second water inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610922888.3A CN106348539B (en) | 2016-10-28 | Method and device for removing nitrate in water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610922888.3A CN106348539B (en) | 2016-10-28 | Method and device for removing nitrate in water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106348539A true CN106348539A (en) | 2017-01-25 |
| CN106348539B CN106348539B (en) | 2024-04-23 |
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| CN109650539A (en) * | 2019-02-21 | 2019-04-19 | 天津友爱环保科技有限公司 | Biologic packing material and its preparation method and application for removing groundwater azotate |
| CN112607847A (en) * | 2020-11-19 | 2021-04-06 | 西北工业大学 | Sewage nitrogen and phosphorus removal treatment method, device and application |
| CN114314836A (en) * | 2021-12-31 | 2022-04-12 | 中国科学院生态环境研究中心 | Sewage treatment device and process for deep denitrification under low carbon-nitrogen ratio by ASO method |
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| CN112607847A (en) * | 2020-11-19 | 2021-04-06 | 西北工业大学 | Sewage nitrogen and phosphorus removal treatment method, device and application |
| CN114314836A (en) * | 2021-12-31 | 2022-04-12 | 中国科学院生态环境研究中心 | Sewage treatment device and process for deep denitrification under low carbon-nitrogen ratio by ASO method |
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