CN108178249A - A kind of synchronous denitrification and dephosphorization method - Google Patents
A kind of synchronous denitrification and dephosphorization method Download PDFInfo
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- CN108178249A CN108178249A CN201810025069.8A CN201810025069A CN108178249A CN 108178249 A CN108178249 A CN 108178249A CN 201810025069 A CN201810025069 A CN 201810025069A CN 108178249 A CN108178249 A CN 108178249A
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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
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/45—Phosphates containing plural metal, or metal and ammonium
- C01B25/451—Phosphates containing plural metal, or metal and ammonium containing metal and ammonium
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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
- C02F2101/105—Phosphorus compounds
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/163—Nitrates
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- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention discloses a kind of synchronous denitrification and dephosphorization methods, belong to field of waste water treatment.The synchronous denitrification and dephosphorization method of the present invention, step are：It A, will be in nitrogenous, phosphorus waste water injection reactor；B, reference electrode, electrochemistry instrument and cathode connect；C, switching switch is switched into anode B, electrochemistry instrument carries out the regulation and control of electric current, voltage, and anode B material is magnesium alloy electrode；D, magnetic agitation is opened, iron filings is made to be in fluidized suspension state；E, pH is adjusted to alkalescent；F, power supply is opened, phosphate and part ammonia nitrogen in waste water are removed by cell reaction, product is ammonium magnesium phosphate crystal；G, switching switch is switched into anode A, other circuits and electrochemistry instrument are kept it turned on；H, superfluous ammonia nitrogen, nitrate nitrogen are converted to nitrogen under electroxidation effect；I, after reaction, it powers off, recycling precipitate after supernatant discharge.The present invention only need to pass through the simple switching of electrode, so that it may have the function that synchronous denitrification dephosphorizing.
Description
The present patent application is divisional application, parent application number：2016102235937；Female case title：A kind of ammonium magnesium phosphate-
Electroxidation integrated device and its synchronous denitrification and dephosphorization method；Parent application day：2016-4-12.
Technical field
The present invention relates to technical field of waste water processing, and in particular to one kind is for municipal sewage, garbage leaching liquid, chemical fertilizer factory
The synchronous denitrification and dephosphorization method of wastewater treatment.
Background technology
With flourishing for wastewater treatment in China cause, country requires sewage discharge also more and more strictly, but by
Body eutrophication problem does not solve not only caused by nitrogen and phosphorus pollution, but also has the tendency that getting worse.China was in 2002
Newest promulgation《Urban wastewater treatment firm pollutant emission standard》(GB18918-2002) all urban wastewater treatments are required in
Plant effluent is discharged into the smaller river of dilution capacity as townscape water and general recycle-water when purposes, performs primary standard
A standards, i.e. TN ＜ 15mg/L, NH4-N ＜ 5mg/L (＜ 8mg/L when water temperature is less than 12 DEG C), TP ＜ 0.5mg/L.Thus may be used
See, the principal contradiction of sewage disposal is changed into the removal of nitrogen and phosphorus pollution object by the removal of organic pollution.At present, China is several
All urban wastewater treatment firms all suffer from same problem, i.e. denitrogenation and dephosphorization can not reach optimum efficiency simultaneously, study carefully
Its reason is mainly：
Based in microorganism nitrification and denitrification mechanism：1st, COD of sewage/N/P ratios are relatively low, and carbon source deficiency becomes denitrification
Denitrogenation and the restrictive factor of biological phosphate-eliminating；2nd, the requirement of nitrifier, denitrifying bacterium and polyP bacteria to sludge age, environmental condition etc. is not
Together, negligible amounts of nitrifier and polyP bacteria and can not be simultaneously in respectively best survival condition.In addition, in high latitude area
Autumn and winter water temperature is relatively low, and microbial metabolic activity weakens, and nitrogen, tp removal rate further reduce.
Achievement in research based on physical and chemical process has derived including physical and chemical adsorption method, blow-off method, isobutylaldehyde precipitation
Method, electrochemical oxidation process and ammonium magnesium phosphate (MgNH4PO4·6H2O, Magnesium ammonium phosphate, MAP) crystallization
The new technologies such as the precipitation method, however, biological nitration/denitrification in nitrogen and phosphorus pollutants treatment technology, stripping, physical chemistry are inhaled at present
The technologies such as attached, MAP chemicrystallizations, electrochemical oxidation, but it is difficult to the elements such as nitrogen, the phosphorus in municipal sewage are removed simultaneously.
Chinese patent publication No. CN101555068, publication date：2009.10.14 it is dirty that patent document discloses a kind of life
The cultural method of the normal low temperature of water while denitrogenation dephosphorizing aerobic particle mud belongs to sewage treatment field, is characterized in that sbr reactor device is adopted
Ratio of height to diameter and 50~67% volume exchange rate with 2~10, do not regulate and control water temperature.Sedimentation time is 30~50min, is gradually shortened
For 1~3min；Or the sedimentation time 5~8min will be set as, it is gradually shortened to 1~3min.In biochemical reaction process, with dissolving
Oxygen concentration DO, oxidation-reduction potential ORP and pH value as real-time control parameter, control in real time mixing time (denitrification puts phosphorus),
Aeration time (oxidation operation, nitrification, denitrification, aerobic phosphorus absorption, denitrifying phosphorus uptake).The invention can improve nitrifier and poly- phosphorus
The content of bacterium realizes low COD domestic sewage at low and normal temperature aerobic particle mud denitrogenation dephosphorizing simultaneously in a manner of aerobic/anaerobic, solves
Operational efficiency caused by the control of sewage disposal system time-program(me) is low, nitrogen, phosphorus handle the problem of unstable.What the invention utilized is
It based on microorganism nitrification and denitrification mechanism, needs to add chemical agent, if processing is bad, it is easy to generate new secondary dirt
Dye.
Invention content
1. technical problems to be solved
Synchronous removal is difficult to for nitrate nitrogen, ammonia nitrogen and phosphate in sewage treatment process and based on microorganism nitrification and anti-nitre
The processing of change mechanism easily generates the technical issues of new pollution, and the present invention provides a kind of synchronous denitrification and dephosphorization methods.Need to only it pass through
The simple switching of electrode, so that it may have the function that synchronous denitrification dephosphorizing, it is easy to operate, it can be achieved that automatic operating, and will not
Generate new pollution sources.
2. technical solution
To solve the above problems, the present invention adopts the following technical scheme that：
A kind of ammonium magnesium phosphate-electroxidation integrated device, including ammonium magnesium phosphate electroxidation crystal system and nitrogen electricity oxygen
Change system, ammonium magnesium phosphate electroxidation crystal system include reactive group and anode B；Nitrogen electroxidation system includes reactive group and anode A；
Reactive group includes electrochemistry instrument, switching switch, reference electrode, iron filings, cathode and reactor, wherein：Reference electrode and cathode
By conductor in parallel, and plumbness is suspended in reactor after being connected respectively with electrochemistry instrument, and iron filings are suspended in reactor
In；Switching switch switches over formula and connects with anode A, anode B respectively after being connected with electrochemistry instrument by conducting wire, is respectively formed
Nitrogen electroxidation system and ammonium magnesium phosphate electroxidation crystal system.
Further embodiment, anode B material are magnesium alloy electrode；Iron filings are suspended in by magnetic agitation in reactor；Ginseng
It is mercury or silver chloride electrode than electrode.
Further embodiment, anode A material are DSA (Ti/RuO2-TiO2-IrO2-SnO2) or SnO2、IrO2、Ti/RuO2
Electrode；Reactor is tetrafluoroethene reactor.
Further embodiment, anode A and anode B is front and rear in the reactor or side by side parallel setting or before cathode
Both sides and cathode are disposed in parallel relation to one another afterwards.
Further embodiment, switching switch are intelligent toggle switch；Cathode material is iron plate.
Further embodiment, reactor shape are round or square.
Further embodiment further includes the double aobvious devices of pH-temperature value being inserted perpendicularly into and be suspended in reactor.
Further embodiment, iron filings dosage are no more than the 10% of reactor capacity.
A kind of synchronous denitrification and dephosphorization method, the specific steps are：
It A, will be in nitrogenous, phosphorus waste water injection reactor；
B, reference electrode, electrochemistry instrument and cathode connect, and are at working condition；
C, switching switch is switched into anode B, electrochemistry instrument carries out the regulation and control of electric current, voltage；
D, magnetic agitation is opened, iron filings is made to be in fluidized suspension state；
E, pH is adjusted to alkalescent；
F, power supply is opened, phosphate and part ammonia nitrogen in waste water are removed by cell reaction, product is brilliant for ammonium magnesium phosphate
Body；
G, switching switch is switched into anode A, other circuits and electrochemistry instrument are kept it turned on；
H, superfluous ammonia nitrogen, nitrate nitrogen are converted to nitrogen under electroxidation effect；
I, after reaction, it powers off, recycling precipitate after supernatant discharge.
3. advantageous effect
Using technical solution provided by the invention, compared with existing known technology, there is following remarkable result：
(1) a kind of ammonium magnesium phosphate-electroxidation integrated device of the invention, ammoniomagnesium phosphate crystal use magnesium electrode
Magnesium is released, significantly reduces the medicament expense of ammoniomagnesium phosphate crystal, and magnesium electrode can be recycled；It is not required to newly-increased work simultaneously
Skill, using two kinds of electrodes, so that it may reach while remove nitrogen and phosphatic purpose in waste water, and the processing of nitrate nitrogen takes off at present
It is a problem for comparing headache in nitrogen technique, and reaction unit of the present invention, it can effectively solve this problem；
(2) a kind of ammonium magnesium phosphate-electroxidation integrated device of the invention, embodies ammonium magnesium phosphate-electroxidation
Integrated technique can be with ammonia nitrogen, nitrate nitrogen and the phosphate in simultaneous removing waste water.Ammonium magnesium phosphate-electroxidation one in the present invention
Body technology includes two technical units of ammoniomagnesium phosphate crystal dephosphorization and electroxidation denitrogenation, magnesium salts is provided using magnesium electrode, with giving up
Ammonia nitrogen and phosphate in water form ammonium magnesium phosphate；Switched by anode, using DSA or SnO2、IrO2、Ti/RuO2For anode,
The nitrate nitrogen and ammonia nitrogen in waste water are removed by electroxidation method, reaches nitrate nitrogen, ammonia nitrogen and phosphatic mesh in synchronous removal waste water
's.In the prior art, the exploitation of the structure of reactor and efficient electrolysis reactor is the key that in electrochemical techniques application process
One of technology, there is presently no electroxidation denitrification and phosphorus removal integration reactor application examples.The present invention is cut by simple anode
It changes, it is possible to achieve the effect that synchronous denitrification dephosphorizing, while secondary pollution will not be caused to environment, be " environmental-friendly " type skill
Art；
(3) a kind of ammonium magnesium phosphate-electroxidation integrated device of the invention, in current electrode process
Electrode passivation is an insurmountable problem, and apparatus of the present invention, fills iron filings in the reactor, on the one hand, fluidize state
Iron filings have certain impact force, and crystal grain is hindered to be precipitated in electrode surface, on the other hand, iron filings institute's shape under electric field action
Into class phenol system, play the role of preventing electrode passivation, be conducive to the oxidative degradation of nitrate nitrogen, ammonia nitrogen；
(4) a kind of ammonium magnesium phosphate-electroxidation integrated device of the invention, waste water enter crystallization reaction slot, pass through
Magnetic agitation, keeps iron filings to be in fluidisation state, and Current Voltage is precisely controlled by electrochemical control instrument, reference electrode for mercury or
Silver chloride electrode, external pH meter and thermometer, magnesium anode and the distribution of nitrogen oxidation electrode runs parallel or the both sides for being distributed in cathode, pass through
Switch automatically switches；To be round or rectangular, electrode spacing is freely adjusted reactor；
(5) a kind of ammonium magnesium phosphate-electroxidation integrated device of the invention, anode A and anode B are in the reactor
As long as the iron filings synergistic effect that state is disposed in parallel relation to one another and fluidized with cathode generates class phenol system, electroxidation can be reached and taken off
The purpose of nitrogen phosphorus removal integration reaction, the setting of each position of components is relatively easy, easy to the processing operation of waste water, applicable surface
Extensively；
(6) a kind of ammonium magnesium phosphate-electroxidation integrated device of the invention, when reactor shape is round, favorably
In the fluidisation of iron filings, while there is no dead angle, be conducive to the growth of ammonium magnesium phosphate crystal, and the ammonium magnesium phosphate crystal of bulky grain settles
Faster, dephosphorization efficiency is high for rate；
(7) a kind of synchronous denitrification and dephosphorization method of the invention, although the best crystallization pH of ammonium magnesium phosphate is 9.0-9.5；
PH is more than that can form ammoniomagnesium phosphate crystal under the conditions of 7.5, but pH adjusts excessively high, then can increase the expense of basic agent, therefore,
By experiment repeatedly and data collection, analysis, preferable ph is adjusted between 7.5-8.5, and temperature is formed under the conditions of 25 DEG C
Ammoniomagnesium phosphate crystal efficiency highest；
(8) a kind of synchronous denitrification and dephosphorization method of the invention, can be applied to municipal sewage, garbage leaching liquid, chemical fertilizer factory
Etc. wastewater treatments, have a wide range of application.
Description of the drawings
The present invention is further described below in conjunction with the accompanying drawings.
Fig. 1 is schematic structural view of the invention.
In figure：1st, electrochemistry instrument；2nd, the double aobvious devices of pH-temperature value；3rd, switching switch；4th, reference electrode；5th, anode A；6、
Anode B；7th, iron filings；8th, cathode；9th, reactor.
Specific embodiment
With reference to specific embodiment, the present invention is described in detail.
Embodiment 1
A kind of ammonium magnesium phosphate-electroxidation the integrated device of the present embodiment, as shown in Figure 1, including ammonium magnesium phosphate electricity
Oxidizing and crystallizing system and nitrogen electroxidation system, ammonium magnesium phosphate electroxidation crystal system include reactive group and anode B6；Nitrogen electroxidation
System includes reactive group and anode A 5；Reactive group includes electrochemistry instrument 1, switching switch 3, reference electrode 4, iron filings 7, cathode 8
With reactor 9, wherein：Reference electrode 4 and cathode 8 by conductor in parallel, and respectively with electrochemistry instrument 1 connect after plumbness
It is suspended in reactor 9, iron filings 7 can be suspended in reactor 9 by magnetic agitation；Switching switch 3 and electrochemistry instrument 1 are logical
It can switch over formula with anode A 5, anode B6 respectively after crossing conducting wire connection and connect.5 material of anode A is DSA electrodes.Anode B6
Material is magnesium alloy electrode.Switching switch 3 is intelligent toggle switch；Reference electrode 4 is mercury electrode；Reactor 9 is tetrafluoroethene
Reactor.
A kind of quantity of ammonium magnesium phosphate of the present embodiment-electroxidation integrated device all parts is：1 magnesium closes
Gold electrode, 1 DSA electrodes (Ti/RuO2-TiO2-IrO2-SnO2), 1 mercury electrode, 1 electrochemical control instrument, 1 pH meter,
1 thermometer, 1 intelligent toggle switch, iron filings are several, and iron filings dosage is no more than 10% (iron filings dosage mistake of reactor capacity
Few, iron filings shearing force and impact force action are limited, prevent electrode passivation efficiency bad；Iron filings dosage is excessive, when sludge quantity with
Increase, second is that fluidisation difficulty greatly increases, therefore according to preliminary result, select 6% as best iron filings filling rate), 1 four
Vinyl fluoride reactor.
The synchronous denitrification and dephosphorization method of the present embodiment, the specific steps are：
A, nitrogenous, phosphorus simulation urine waste water is injected in tetrafluoroethene reactor；
B, reference electrode 4, electrochemistry instrument 1 and cathode 8 connect, and are at working condition；
C, intelligent toggle switch is switched into magnesium alloy electrode, electrochemistry instrument 1 according to water quality nitrogen, phosphate concn into
The regulation and control of row electric current, voltage；
D, magnetic agitation is opened, iron filings 7 is made to be in fluidized suspension state；
E, adjusting pH, (by detection, the best crystallization pH of ammonium magnesium phosphate is 9.0-9.5 to alkalescent；In pH more than 7.5
Ammoniomagnesium phosphate crystal can be formed under part, but pH adjusts excessively high, then can increase the expense of basic agent, therefore, by repeatedly
Experiment and data collection, analysis, preferable ph are adjusted between 7.5-8.5, and temperature forms ammonium magnesium phosphate knot under the conditions of 25 DEG C
Brilliant efficiency highest)；
F, power supply is opened, phosphate and part ammonia nitrogen in waste water are removed by cell reaction, product is brilliant for ammonium magnesium phosphate
Body；
G, switching switch 3 is switched into anode A 5, other circuits and electrochemistry instrument 1 are kept it turned on；
H, superfluous ammonia nitrogen, nitrate nitrogen are converted to nitrogen under electroxidation effect；
I, after reaction, it powers off, recycling precipitate after supernatant discharge, handling result is as shown in table 1.
Table 1DSA electrode electro Chemicals method processing simulation urine waste water (Cl-A concentration of 600mg/L)
| Simulate urine waste water | PO4 3- | NH4 + | NO3- | K+ |
| Concentration (mg/L) | 150 | 900 | 600 | 700 |
| Supernatant remains (mg/L) | 13.5 | 45 | 42 | 350 |
| Removal rate (%) | 91% | 95% | 93% | 50% |
Embodiment 2
A kind of ammonium magnesium phosphate-electroxidation the integrated device of the present embodiment, basic structure such as embodiment 1 are different
Part is：5 material of anode A is SnO2Electrode.Anode A 5 and anode B6 are front and rear in reactor 9 to be arranged in parallel.8 material of cathode
For iron plate.Reference electrode 4 is silver chloride electrode.Applied in the processing of municipal sewage.
The experimental results showed that when anode material is SnO2During electrode, phosphatic removal rate is 90.3% in municipal sewage,
But SnO2Electrode is conducive to the accumulation of HO, and DSA electrodes a little higher than to the removal efficiency of nitrate nitrogen reach 95%, but to ammonia nitrogen
Removal efficiency decreases instead, is 91%.
Embodiment 3
A kind of ammonium magnesium phosphate-electroxidation the integrated device of the present embodiment, basic structure such as embodiment 2 are different
Part is：Further include the double aobvious devices 2 of pH-temperature value for being inserted perpendicularly into and being suspended in reactor 9.5 material of anode A is IrO2
Electrode.Anode A 5 and anode the B6 side by side parallel in reactor 9 are set.9 shape of reactor is round.Applied to garbage leaching liquid
Processing in.
The experimental results showed that circular reactor is conducive to the fluidisation of iron filings, while without dead angle, be conducive to ammonium magnesium phosphate crystalline substance
The growth of body, and the ammonium magnesium phosphate crystal rate of settling of bulky grain is faster, dephosphorization efficiency is high.When the anode of electroxidation is IrO2Electricity
During pole, IrO2Electrode has the characteristics that selective oxidation, in Cl-Under a large amount of existence conditions, the removal rate of ammonia nitrogen reaches in simulated wastewater
To 97%, while the removal efficiency of nitrate nitrogen also reaches 90.5%.
Embodiment 4
A kind of ammonium magnesium phosphate-electroxidation the integrated device of the present embodiment, basic structure such as embodiment 2 are different
Part is：Further include the double aobvious devices 2 of pH-temperature value for being inserted perpendicularly into and being suspended in reactor 9.5 material of anode A is Ti/
RuO2Electrode.Anode A 5 and anode B6 are disposed in parallel relation to one another in reactor 9 positioned at the front and rear sides of cathode 8 and cathode 8.Reaction
9 shape of device is square.In processing applied to chemical fertilizer factory's waste water.
The experimental results showed that in reaction process, square reactor corner has part iron filings and ammonium magnesium phosphate crystal not to flow
Change is got up, and influences electroxidation dephosphorization efficiency, while increases the probability of electrode passivation.And electroxidation anode material is Ti/RuO2
During electrode, the removal rate of ammonia nitrogen and nitrate nitrogen is respectively 93.5% and 91.5%.
Schematically the invention and embodiments thereof are described above, the description is not restricted.So
If those of ordinary skill in the art are enlightened by it, in the case where not departing from this creation objective, not inventively design
Go out the frame mode similar to the technical solution and embodiment, the protection domain of this patent should all be belonged to.
Claims (2)
1. a kind of synchronous denitrification and dephosphorization method, which is characterized in that the specific steps are：
It A, will be in nitrogenous, phosphorus waste water injection reactor (9)；
B, reference electrode (4), electrochemistry instrument (1) and cathode (8) connect, and are at working condition；
C, switching switch (3) is switched into anode B (6), electrochemistry instrument (1) carries out the regulation and control of electric current, voltage；
D, magnetic agitation is opened, makes iron filings (7) in fluidized suspension state；
E, pH is adjusted to alkalescent；
F, power supply is opened, phosphate and part ammonia nitrogen in waste water are removed by cell reaction, product is ammonium magnesium phosphate crystal；
G, switching switch (3) is switched into anode A (5), other circuits and electrochemistry instrument (1) are kept it turned on；
H, superfluous ammonia nitrogen, nitrate nitrogen are converted to nitrogen under electroxidation effect；
I, after reaction, it powers off, recycling precipitate after supernatant discharge.
2. synchronous denitrification and dephosphorization method according to claim 1, it is characterised in that：PH to 7.5- is adjusted in the step E
8.5；Temperature is at 25 DEG C.
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| CN107055889A (en) * | 2017-07-03 | 2017-08-18 | 辽宁科技学院 | A kind of marine culture wastewater efficient electrolysis denitrification dephosphorization apparatus and method |
| CN107265610A (en) * | 2017-08-10 | 2017-10-20 | 滨州学院 | A kind of synchronous sewage disposal and the Bioelectrochemical device of recovery of nitrogen and phosphorus |
| CN108706693B (en) * | 2018-05-24 | 2021-11-26 | 天津大学 | Switchable three-electrode reactor for treating suspended matters and refractory organic pollutants |
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| CN109264834B (en) * | 2018-11-05 | 2020-12-25 | 中国地质大学（北京） | Treatment method and reactor for nitrogen-containing chlorine-containing degradation-resistant organic wastewater |
| CN109609970B (en) * | 2018-12-21 | 2021-02-26 | 北京林业大学 | System and method for promoting recovery of potassium in urine wastewater through magnesium anode electro-corrosion |
| CN109796068A (en) * | 2019-03-19 | 2019-05-24 | 中国地质大学（北京） | A kind of integrated reformer handling nitrogenous organic wastewater and method |
| CN114853235A (en) * | 2022-04-22 | 2022-08-05 | 长江水利委员会长江科学院 | Electric nitrogen and phosphorus double-anode cooperative recovery device and method for drainage pore water |
| CN118084149B (en) * | 2024-04-26 | 2024-07-26 | 生态环境部华南环境科学研究所(生态环境部生态环境应急研究所) | Method for recycling and decoloring biogas slurry nutrient by electrode polarity reversal |
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| JP2003236563A (en) * | 2002-02-20 | 2003-08-26 | Yamato:Kk | Method and device for treating phosphorus containing waste water |
| JP2004097949A (en) * | 2002-09-10 | 2004-04-02 | Sanyo Electric Co Ltd | Wastewater treatment system |
| CN101549896A (en) * | 2009-05-07 | 2009-10-07 | 上海交通大学 | Integrated electrolysis nitrogen and phosphorus removal wastewater treatment method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108977823A (en) * | 2018-08-30 | 2018-12-11 | 湖北美辰环保科技有限公司 | A kind of nitrogen phosphorus fluorine recovery method based on electrochemical reactor |
| CN108977823B (en) * | 2018-08-30 | 2020-05-19 | 湖北美辰环保科技有限公司 | Nitrogen, phosphorus and fluorine recovery method based on electrochemical reactor |
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| CN108178249B (en) | 2020-02-21 |
| CN105668717A (en) | 2016-06-15 |
| CN105668717B (en) | 2019-01-01 |
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