CN109160581A - Determine the methods and applications of the electrolysis time of electrochemical treatments high ammonia-nitrogen wastewater with high salt - Google Patents
Determine the methods and applications of the electrolysis time of electrochemical treatments high ammonia-nitrogen wastewater with high salt Download PDFInfo
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- CN109160581A CN109160581A CN201811354245.9A CN201811354245A CN109160581A CN 109160581 A CN109160581 A CN 109160581A CN 201811354245 A CN201811354245 A CN 201811354245A CN 109160581 A CN109160581 A CN 109160581A
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
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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
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
Abstract
The present invention provides a kind of methods and applications of the electrolysis time of determining electrochemical treatments high ammonia-nitrogen wastewater with high salt, the following steps are included: being electrolysed high ammonia-nitrogen wastewater with high salt, with the progress of electrolytic process, persistently detect the △ pH value of waste water, as △ pH > 0, the pH of waste water is continued to test, when pH reaches setting value, electrolysis terminates, and wastewater treatment is completed.In the method for electrochemical treatments high ammonia-nitrogen wastewater with high salt provided by the present invention, using electrochemical techniques by ammonia nitrogen direct oxidation be nitrogen, not will form the by-products such as ammonium salt, simple process.This method removes the principle of ammonia nitrogen according to electrochemistry, and after ammonia nitrogen removal, the pH of waste water is risen rapidly, and electrolysis time is controlled using pH as signal, it is convenient, accurate to have many advantages, such as, solves the problems, such as the On-line Control of electrochemical treatments ammonia nitrogen waste water technique.
Description
Technical field
The present invention relates to technical field of waste water processing, in particular to a kind of determining electrochemical treatments high ammonia nitrogen with high salt
The methods and applications of the electrolysis time of waste water.
Background technique
With the rapid development of our country's economy, the discharge amount of industrial wastewater is growing day by day, and high ammonia-nitrogen wastewater with high salt is industry
Than a kind of water body difficult to deal in waste water, salinity is high, and microorganism can not survive, and handles the common method of this water body at present
For physical method, such as blow-off method, vaporizing extract process.Electrochemical techniques, can be directly by ammonia as a kind of novel ammonia nitrogen processing method
Nitrogen is converted into nitrogen, and process flow is simple, gets more and more people's extensive concerning in recent years, and in fields such as the processing of landfill leachate
With relevant Engineering Projects.
Mainly pass through electrolysis chloride ion using the principle that electrochemical techniques handle high ammonia-nitrogen wastewater with high salt and generates hypochlorous acid
Root or hypochlorous acid, hypochlorite or hypochlorous acid occur breakpoint chlorination with ammonia nitrogen again and react, to make ammonium oxidation nitrogen.Removal
The electricity of a certain amount of ammonia nitrogen consumption is fixed, but when ammonia nitrogen concentration changes in waste water, how to control electrolysis time mesh
Before be a uncontrollable factor.
Using ammonia nitrogen concentration in ammonia nitrogen In-circiut tester test waste water and control system, control system are transferred to as signal
The electricity for needing to consume can be calculated according to ammonia nitrogen concentration, and then can control electrolysis time, realize electrochemical treatments ammonia nitrogen
The On-line Control of waste water, but the time of online ammonia nitrogen tester test sample needs 40 minutes, can not Real-time Feedback signal, because
This cannot achieve On-line Control.
After the ammonia nitrogen in waste water is all removed, the residual chlorine concentration in waste water is risen rapidly, and can use chlorine content
The signal completed as electrolysis is quickly increased, controls electrolysis time, but the measurement range of commercially available chlorine residue instrument is generally less than 20mg/
G, and the residual chlorine concentration in electrolytic process in waste water is generally larger than 20mg/L, therefore can not test chlorine residue using online chlorine residue instrument
Concentration is as the On-Line Control Method for realizing electrochemical treatments high ammonia-nitrogen wastewater with high salt.
In view of this, the present invention is specifically proposed.
Summary of the invention
The first object of the present invention is to provide a kind of method of electrochemical treatments high ammonia-nitrogen wastewater with high salt, above-mentioned to solve
Problem, the method for electrochemical treatments high ammonia-nitrogen wastewater with high salt remove the principle of ammonia nitrogen according to electrochemistry, work as ammonia nitrogen removal
Afterwards, the pH of waste water rises rapidly, and electrolysis time is controlled using pH as signal, it is convenient, accurate to have many advantages, such as, solves electrochemistry
Handle the On-line Control problem of ammonia nitrogen waste water technique.
In order to realize above-mentioned purpose of the invention, the following technical scheme is adopted:
A kind of method of electrochemical treatments high ammonia-nitrogen wastewater with high salt, comprising the following steps:
It is electrolysed high ammonia-nitrogen wastewater with high salt, with the progress of electrolytic process, the △ pH value of waste water is persistently detected, when pH > 0 △
When, the pH of waste water is continued to test, when pH reaches setting value, electrolysis terminates, and wastewater treatment is completed.
It is using electrochemical techniques that ammonia nitrogen is straight in the method for electrochemical treatments high ammonia-nitrogen wastewater with high salt provided by the present invention
It connects and is oxidized to nitrogen, not will form the by-products such as ammonium salt, simple process.The principle that ammonia nitrogen is removed according to electrochemistry, when ammonia nitrogen is gone
After removing, the pH of waste water is risen rapidly, and electrolysis time is controlled using pH as signal, it is convenient, accurate to have many advantages, such as, solves electrification
Learn the On-line Control problem of processing ammonia nitrogen waste water technique.
Preferably, the high ammonia-nitrogen wastewater with high salt is neutral, faintly acid or alkalescent, the preferred high ammonia nitrogen with high salt
The pH=5-11 of waste water.
Preferably, the high ammonia-nitrogen wastewater with high salt includes oil refining, chemical fertilizer, inorganic chemical industry, ferroalloy, glass manufacture, meat
Processing, Feed Manufacturing, animal husbandry discharge high ammonia-nitrogen wastewater with high salt, rubbish sepage and ammonia nitrogen adsorbent eluent.
Preferably, the eluent is the solution after ammonia nitrogen adsorbent is regenerated, the regeneration that the regenerative process uses
Liquid is the solution containing chloride ion；It is furthermore preferred that include one of sodium chloride solution, hydrochloric acid solution, Klorvess Liquid or
Several combinations；It is furthermore preferred that the chlorine ion concentration is 0.1-3.0mol/L.
Preferably, the voltage of the electrolysis high ammonia-nitrogen wastewater with high salt is 20-40V, electric current 180-300A.
Preferably, the voltage of the electrolysis high ammonia-nitrogen wastewater with high salt is 25V, electric current 180A.
Preferably, the current density of the electrolysis high ammonia-nitrogen wastewater with high salt is 60-100mA/cm2, more preferably 70-
90mA/cm2, it is still more preferably 80mA/cm2。
Preferably, the pH setting value is 6-8, more preferably 6-7.
Preferably, the pole plate spacing of the electrolysis high ammonia-nitrogen wastewater with high salt is 30-50mm, more preferably 30-35mm.
Preferably, in the high ammonia-nitrogen wastewater with high salt, ammonia nitrogen concentration 600-3000mg/L, chlorine ion concentration 3000-
110000mg/L。
Compared with prior art, the invention has the benefit that
(1) in the method for electrochemical treatments provided by the present invention high ammonia-nitrogen wastewater with high salt, using electrochemical techniques by ammonia
Nitrogen direct oxidation is nitrogen, not will form the by-products such as ammonium salt, simple process.
(2) method of electrochemical treatments provided by the present invention high ammonia-nitrogen wastewater with high salt removes ammonia nitrogen according to electrochemistry
Principle, after ammonia nitrogen removal, the pH of waste water is risen rapidly, and electrolysis time is controlled using pH as signal, is had convenient, accurate etc. excellent
Point solves the problems, such as the On-line Control of electrochemical treatments ammonia nitrogen waste water technique.
(3) present invention detects program by setting pH, and system detects the positive and negative of △ pH first, judges pH value later, works as △
When pH reaches setting value greater than 0 and pH, electrolysis system can be just closed, it, all will not be whole when any one of two conditions are unsatisfactory for
Only electrolysis system.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
PH variation when Fig. 1 is electrochemical treatments difference ammonia nitrogen concentration waste water provided by the present invention；
Fig. 2 is that the online pH detection system of the present invention controls electrolytic process flow chart；
Fig. 3 is the process flow diagram of electrochemical treatments ammonia nitrogen adsorbent eluent provided by the embodiment of the present invention 1；
Ammonia nitrogen concentration and pH when Fig. 4 is electrochemical treatments ammonia nitrogen adsorbent eluent provided by the embodiment of the present invention 1
Variation；
Process flow signal when Fig. 5 is electrochemical treatments landfill leachate provided by invention embodiment 2
Figure；
Ammonia nitrogen concentration and pH when Fig. 6 is electrochemical treatments landfill leachate provided by invention embodiment 2
Variation.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with the drawings and specific embodiments, but
Be it will be understood to those of skill in the art that it is following described embodiments are some of the embodiments of the present invention, rather than it is whole
Embodiment is merely to illustrate the present invention, and is not construed as limiting the scope of the invention.Based on the embodiments of the present invention, ability
Domain those of ordinary skill every other embodiment obtained without making creative work, belongs to guarantor of the present invention
The range of shield.The person that is not specified actual conditions in embodiment, carries out according to conventional conditions or manufacturer's recommended conditions.Agents useful for same
Or production firm person is not specified in instrument, is the conventional products that can be obtained by commercially available purchase.
A kind of method of electrochemical treatments high ammonia-nitrogen wastewater with high salt, comprising the following steps:
It is electrolysed high ammonia-nitrogen wastewater with high salt, with the progress of electrolytic process, the △ pH value of waste water is persistently detected, when pH > 0 △
When, the pH of waste water is continued to test, when pH reaches setting value, electrolysis terminates, and wastewater treatment is completed.
In the prior art, ammonia nitrogen concentration in waste water is tested using ammonia nitrogen In-circiut tester and be transferred to control system as signal
System, control system can calculate the electricity for needing to consume according to ammonia nitrogen concentration, and then can control electrolysis time, realize electrification
The On-line Control of processing ammonia nitrogen waste water is learned, but the time of online ammonia nitrogen tester test sample needs 40 minutes, it can not be real-time
Feedback signal, therefore cannot achieve On-line Control.
After the ammonia nitrogen in waste water is all removed, the residual chlorine concentration in waste water is risen rapidly, and can use chlorine content
The signal completed as electrolysis is quickly increased, controls electrolysis time, but the measurement range of commercially available chlorine residue instrument is both less than greatly 20mg/
G, and the residual chlorine concentration in electrolytic process in waste water is generally larger than 20mg/L, therefore can not test chlorine residue using online chlorine residue instrument
Concentration is as the On-Line Control Method for realizing electrochemical treatments high ammonia-nitrogen wastewater with high salt.
The principle of electrolysis time is controlled by pH signal:
After nitrogen-containing wastewater enters electrochemical reactor, the oxidation that ammonia nitrogen may occurs with different approaches on anode is anti-
It answers: first is that the direct electrochemical oxidation of ammonia nitrogen；Second is that the indirect electrochemical oxidation of ammonia nitrogen reacts, i.e., by electrode reaction, generate
Oxidizing substance, the substance are reacted with ammonia nitrogen again, make ammonia nitrogen degradation, removing.Direct electrochemical oxidation and without Cl-When Indirect Electro
Chemical oxidation is limited to the removal effect of ammonia nitrogen, and electrochemical oxidation ammonia nitrogen, which mainly utilizes, Cl-When indirect electrochemical oxidation
Effect.
When there are Cl in waste water-, following reactions mainly occur
Cell reaction: NaCl+H2O=NaClO+H2↑
Ammonia nitrogen removal reaction: 2NH4++ 3NaClO=N2↑+3NaCl+3H2O+2H+
Every removal 1mol ammonia nitrogen, will generate 1mol hydrogen ion, therefore when electrochemical treatments high ammonia-nitrogen wastewater with high salt, produce water
For acidity, when the ammonia nitrogen in waste water is all removed, hydrogen ion concentration highest in waste water, pH value is minimum, later with electricity
The increase of time is solved, the sodium hypochlorite of generation can not be utilized, and sodium hypochlorite is strong base-weak acid salt, be hydrolyzed in alkalinity, therefore pH
It will rise rapidly, as shown in Figure 1.When pH is increased rapidly, illustrate that the ammonia nitrogen in waste water has been entirely removed, using pH as signal
The automatic control of electrochemical treatments high ammonia-nitrogen wastewater with high salt can be achieved.
Before electrolytic process generation, the pH of waste water is generally neutral or faintly acid, after electrolysis starts, with electrolysis time
Increase, hydrogen ion is continuously generated, and the pH of waste water is gradually decreased, and △ pH less than 0, constantly examine in the process by sensor during this
△ pH is surveyed, when △ pH is less than 0, electrolysis continues, and when the ammonia nitrogen in waste water is all removed, wastewater pH reaches most at this time
Low spot, wastewater pH is gradually increasing later, and sensor will test △ pH greater than 0, will judge pH value later, if pH is less than electrolysis eventually
Point setting value (such as pH=n), then continue to be electrolysed, and after pH is greater than n, electrolysis stops, and Fig. 2 is the control electrolysis of online pH detection system
Process flow diagram flow chart.
It is using electrochemical techniques that ammonia nitrogen is straight in the method for electrochemical treatments high ammonia-nitrogen wastewater with high salt provided by the present invention
It connects and is oxidized to nitrogen, not will form the by-products such as ammonium salt, simple process.This method removes the principle of ammonia nitrogen according to electrochemistry, when
After ammonia nitrogen removal, the pH of waste water is risen rapidly, and electrolysis time is controlled using pH as signal, and it is convenient, accurate to have many advantages, such as, is solved
The On-line Control problems of electrochemical treatments ammonia nitrogen waste water techniques.
Preferably, the high ammonia-nitrogen wastewater with high salt is neutral, faintly acid or alkalescent, the preferred high ammonia nitrogen with high salt
The pH=5-11 of waste water.
Alkaline condition is conducive to Cl-→Cl2→ClO-→Cl-Circulation, and Cl2And ClO-The two can effectively facilitate ammonia nitrogen
Indirect electrochemical oxidation reaction
Preferably, the high ammonia-nitrogen wastewater with high salt includes oil refining, chemical fertilizer, inorganic chemical industry, ferroalloy, glass manufacture, meat
Processing, Feed Manufacturing, animal husbandry discharge high ammonia-nitrogen wastewater with high salt, rubbish sepage and ammonia nitrogen adsorbent eluent.
Preferably, the eluent is the solution after ammonia nitrogen adsorbent is regenerated, the regeneration that the regenerative process uses
Liquid is the solution containing chloride ion；It is furthermore preferred that include one of sodium chloride solution, hydrochloric acid solution, Klorvess Liquid or
Several combinations；It is furthermore preferred that the chlorine ion concentration is 0.1-3.0mol/L.
Preferably, the voltage of the electrolysis high ammonia-nitrogen wastewater with high salt is 20-40V, electric current 180-300A；It is furthermore preferred that
Voltage is 25V, electric current 180A.
Preferably, the current density of the electrolysis high ammonia-nitrogen wastewater with high salt is 60-100mA/cm2, more preferably 70-
90mA/cm2, it is still more preferably 80mA/cm2。
With the increase of current density, within the identical reaction time, the removal rate of ammonia nitrogen and total nitrogen, which has, significantly to be mentioned
It is high.Later, increase current density, the speedup of removal rate slows down.
Preferably, the pH setting value is 6-8, more preferably 6-7.
It is then to be discharged again close to neutral by wastewater treatment, avoids acid solution to the corrosion of equipment and the pollution of environment.
Preferably, the pole plate spacing of the electrolysis high ammonia-nitrogen wastewater with high salt is 30-50mm, more preferably 30-35mm.
Reduce spacing, electric field strength increases between pole plate, and the migration rate of charged ion increases, and electric discharge occurs straight on pole plate
The probability for connecing electrochemical reaction also increases.But if pole plate spacing is too small, anode surface can generate passivation phenomenon, and energy consumption increases
Greatly, the concentration polarization of solution is serious, and electrolytic efficiency reduces.On the contrary, pole plate spacing increases, the resistance between pole plate increases, and electric energy disappears
Consumption improves, electrolytic efficiency decline., it is the removal rate highest of ammonia nitrogen and total nitrogen at 30-35mm in pole plate spacing.
Preferably, in the high ammonia-nitrogen wastewater with high salt, ammonia nitrogen concentration 600-3000mg/L, chlorine ion concentration 3000-
100000mg/L。
The removal rate of increase chlorine ion concentration, ammonia nitrogen and total nitrogen is significantly improved.
Embodiment 1
Staying water is the eluent of ammonia nitrogen adsorbent, reaches saturation to absorption ammonia nitrogen using the sodium chloride of 0.5mol/L
Ammonia nitrogen adsorbent regenerated, the main component of the eluent of generation is sodium chloride, ammonia nitrogen and other a small amount of cations,
Each ion concentration such as table 1 is handled the eluent using electro-chemical systems, and processing method is batch-type processing, handles it
Solution afterwards is reused as regenerated liquid, processing technological flow such as Fig. 3, and eluent is by pump in electrolysis reactor and electrolysis storage
It deposits in slot and recycles, electrolysis reactor is 10 grades of series connection, 3 grades of parallel-connection structures, it is therefore an objective to the voltage (25V) of electrolysis reactor is reduced,
The electric current (180A) of electrolysis reactor is improved, the design of this electrolytic cell is safer, energy consumption is lower.
In electrolytic process, the variation of ammonia nitrogen concentration and pH value in eluent is as shown in figure 4, subtracting with ammonia nitrogen concentration
Low, the pH in eluent is gradually decreased, and after ammonia nitrogen concentration is reduced to 0, the pH in eluent is increased rapidly, when pH > 0 △ and
Signal when stopping when pH=6 as electrolysis, at this point, closing electrolysis system, the ammonia nitrogen in eluent is removed, which can make
It is reused for the regenerated liquid of ammonia nitrogen adsorbent.
The leading ion ingredient of 1 ammonia nitrogen adsorbent eluent of table
| Ingredient | Ammonia nitrogen | Cl- | Na+ | Ca2+ | K+ | Mg2+ |
| Concentration, mg/L | 600 | 18200 | 11500 | 620 | 479 | 160 |
Embodiment 2
Staying water is that the garbage leaching liquid that certain destructor plant generates passes through the production water pre-processed, after nanofiltration, main
Ion concentration such as table 2 is wanted, TDS 5200mg/L, ammonia nitrogen concentration is in 1000mg/L or so, chlorine ion concentration 2030mg/L, also
There are some other cations.
The high ammonia-nitrogen wastewater with high salt, the same Fig. 5 of processing technological flow figure are handled using electrochemical techniques, electrolysis reactor is set
Meter is the same as example 1, decomposition voltage 40V, Faradaic current 300A, the ammonia nitrogen concentration and pH in electrolytic process, in waste water
As shown in fig. 6, as ammonia nitrogen is gradually removed, the pH value of waste water is gradually decreased for the variation of value, after ammonia nitrogen is all removed,
The pH of waste water touches the bottom at this time, and later since the sodium hypochlorite hydrolysis that electrolysis generates is in alkalinity, pH is in rapid increase, works as △
PH > 0 and signal when stopping when pH=2 as electrolysis, waste water is discharged from electrolysis reserve tank later, the waste water of discharge due to
In acidity, after needing to be adjusted to neutrality can outlet, therefore the cheap lime stone of this process selection adjusts the pH of waste water, passes through
Production water pH after lime stone, can be with direct emission 6.0 or so.
Table 2 passes through the leading ion ingredient of the landfill leachate after pre-treatment
| Ingredient | TDS | Ammonia nitrogen | Cl- | Ca2+ | Mg2+ | Na+ |
| Concentration, mg/L | 5200 | 1000 | 2030 | 630 | 260 | 684 |
Embodiment the result shows that, the method for electrochemical treatments high ammonia-nitrogen wastewater with high salt provided by the present invention, according to electrification
The principle of removal ammonia nitrogen is learned, after ammonia nitrogen removal, the pH of waste water is risen rapidly, and electrolysis time is controlled using pH as signal, is had
The advantages that convenient, accurate, solves the problems, such as the On-line Control of electrochemical treatments ammonia nitrogen waste water technique.The present invention passes through setting pH inspection
Ranging sequence, system detect the positive and negative of △ pH first, judge pH value later, when △ pH, which is greater than 0 and pH, reaches setting value, can just close
Electrolysis system is closed, when any one of two conditions are unsatisfactory for, will not all terminate electrolysis system.
Although illustrate and describing the present invention with specific embodiment, it will be appreciated that the above various embodiments is only used
To illustrate technical solution of the present invention, rather than its limitations；Those skilled in the art should understand that: without departing substantially from this hair
It in the case where bright spirit and scope, is possible to modify the technical solutions described in the foregoing embodiments, or to wherein
Some or all of technical characteristic is equivalently replaced；And these are modified or replaceed, and do not make the essence of corresponding technical solution
It departs from the scope of the technical solutions of the embodiments of the present invention；It is, therefore, intended that in the following claims including belonging to the present invention
All these substitutions and modifications in range.
Claims (10)
1. a kind of method of electrochemical treatments high ammonia-nitrogen wastewater with high salt, which comprises the following steps:
It is electrolysed high ammonia-nitrogen wastewater with high salt, with the progress of electrolytic process, persistently detects the △ pH value of waste water, as △ pH > 0, after
The pH of continuous detection waste water, when pH reaches setting value, electrolysis terminates, and wastewater treatment is completed.
2. the method for electrochemical treatments high ammonia-nitrogen wastewater with high salt according to claim 1, which is characterized in that the height with high salt
Ammonia nitrogen waste water is neutral, faintly acid or alkalescent, the pH=5-11 of the preferred high ammonia-nitrogen wastewater with high salt.
3. the method for electrochemical treatments high ammonia-nitrogen wastewater with high salt according to claim 1, which is characterized in that the height with high salt
Ammonia nitrogen waste water includes that oil refining, chemical fertilizer, inorganic chemical industry, ferroalloy, glass manufacture, meat packing, Feed Manufacturing, animal husbandry are discharged
High ammonia-nitrogen wastewater with high salt, rubbish sepage and ammonia nitrogen adsorbent eluent.
4. the method for electrochemical treatments high ammonia-nitrogen wastewater with high salt according to claim 3, which is characterized in that the eluent
Solution after being regenerated for ammonia nitrogen adsorbent, the regenerated liquid that the regenerative process uses are the solution containing chloride ion；It is preferred that
, including one of sodium chloride solution, hydrochloric acid solution, Klorvess Liquid or several combinations；Preferably, the chloride ion
Concentration is 0.1-3.0mo l/L.
5. the method for electrochemical treatments high ammonia-nitrogen wastewater with high salt according to claim 1, which is characterized in that the electrolysis is high
The voltage of salt high ammonia-nitrogen wastewater is 20-40V, electric current 180-300A.
6. the method for electrochemical treatments high ammonia-nitrogen wastewater with high salt according to claim 5, which is characterized in that the electrolysis is high
The voltage of salt high ammonia-nitrogen wastewater is 25V, electric current 180A.
7. the method for electrochemical treatments high ammonia-nitrogen wastewater with high salt according to claim 1, which is characterized in that the electrolysis is high
The current density of salt high ammonia-nitrogen wastewater is 60-100mA/cm2, preferably 70-90mA/cm2, more preferably 80mA/cm2。
8. the method for electrochemical treatments high ammonia-nitrogen wastewater with high salt according to claim 1, which is characterized in that the pH setting
Value is 6-8, preferably 6-7.
9. the method for electrochemical treatments high ammonia-nitrogen wastewater with high salt according to claim 1, which is characterized in that the electrolysis is high
The pole plate spacing of salt high ammonia-nitrogen wastewater is 30-50mm, preferably 30-35mm.
10. the method for electrochemical treatments high ammonia-nitrogen wastewater with high salt according to claim 1, which is characterized in that described with high salt
In high ammonia-nitrogen wastewater, ammonia nitrogen concentration 600-3000mg/L, chlorine ion concentration 3000-110000mg/L.
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| CN114162917A (en) * | 2021-12-03 | 2022-03-11 | 赣州有色冶金研究所有限公司 | End point judgment method for treating high-salt ammonia nitrogen wastewater by electrochemical method |
| CN115974238A (en) * | 2023-02-21 | 2023-04-18 | 浙江浙能技术研究院有限公司 | Intelligent control system for treating ammonia nitrogen wastewater through electrochemical oxidation and operation method |
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