CN107032537A - A kind of processing method of refuse leachate nanofiltration concentrated water - Google Patents
A kind of processing method of refuse leachate nanofiltration concentrated water Download PDFInfo
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- CN107032537A CN107032537A CN201610954657.0A CN201610954657A CN107032537A CN 107032537 A CN107032537 A CN 107032537A CN 201610954657 A CN201610954657 A CN 201610954657A CN 107032537 A CN107032537 A CN 107032537A
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
A kind of refuse leachate nanofiltration concentrated water treatment method, comprises the following steps：Nanofiltration concentrated water is subjected to Primary Oxidation by rail carbon micro-electrolytic processes；Primary Oxidation water outlet is added after a certain amount of hydrogen peroxide, using the rail carbon micro-electrolytic processes residual acidity and the ferrous ion of its generation, makes reaction system be converted into Fenton oxidation to carry out secondary oxidation；By water outlet after above-mentioned Fenton oxidation add alkali PH is adjusted back after flocculation sediment carry out mud-water separation, after separation supernatant add ozone catalyst carry out three times oxidation；Catalytic ozonation water outlet carries out electrolytic catalyst and carries out the discharged wastewater met the national standard after four oxidations, catalytic and oxidative electrolysis technology.Treatment method has the advantage that degree for the treatment of is deep, operation is flexible, processing cost is low.
Description
Technical field
The present invention relates to technical field of sewage, Iron carbon reduction+Fenton oxidation+ozone is utilized more particularly, to one kind
The method that catalysis oxidation+catalytic and oxidative electrolysis technology group technology is handled refuse leachate nanofiltration concentrated water.
Background technology
Percolate be garbage loading embeading processing after, due to the immersion of the leaching and surface water, underground water of Atmospheric precipitation, Gu
Body discarded object is under physics, chemistry and microbial action, the high concentrated organic wastewater of generation.The generation of percolate comes from three
Individual aspect:One is atmospheric precipitation (snow), rainwash and underground water invasion；Two be original moisture in rubbish；Three be that rubbish is filled out
The organic wastewater produced after burying due to microbiological anaerobic decomposition.Pollutant in percolate essentially from：Rubbish
The great amount of soluble organic matter and inorganic matter itself contained；Dissolved during the immersion of rainwater, surface water or underground water and
Into the organic matter and inorganic matter of percolate；Solable matter and earthing that rubbish is produced by biology, physics, chemical action
With the solable matter for entering percolate in surrounding soil.Percolate is as high concentrated organic wastewater, if unprocessed straight
Run in and put, serious pollution can be caused to the underground water around landfill yard, surface water and soil.
Because percolate water quality is complicated and changes greatly, the features such as with biological toxic action, permeated for rubbish
The treatment technology of liquid is always the focus of educational circles's research, because percolate composition is extremely complex, is handled very with a kind of method
It is difficult up to standard, frequently with a variety of different type process integrations using just effluent quality being made to reach national row in general Practical Project
Put standard.At this stage, the main refuse leachate treatment technology of China has traditional physico-chemical process and bioanalysis, and film
A variety of processing modes such as processing method, land law.
With difference of the modern industry according to discharge standard, the typical two stage treatment of percolate typically need to be by pre- place
The processes such as reason, anaerobism and aerobic biological treatment, wherein Aerobic Process for Treatment can select to coordinate with ultrafiltration, form MBR techniques.For up to
To higher emission request or reuse requirement, MBR water outlets typically carry out tertiary treatment using nanofiltration+reverse osmosis process.By three
Refuse leachate after level processing can reach the requirement of recycle-water, but in tertiary treatment processes double membrane process can all produce it is dense
Water, reverse osmosis concentrated water can return to nanofiltration front end and be intake as nanofiltration, and nanofiltration concentrated water have accumulated dense all kinds of salinities and
Organic matter is, it is necessary to could qualified discharge after being handled.
The features such as there is high salt, high organic matter, high ammonia nitrogen due to nanofiltration concentrated water, so nanofiltration concentrated water can only use materialization work
Skill carries out advanced treating.Conventional process is evaporation and advanced oxidation, and evaporation technology exists costly and has a solid waste generation；And
Conventional single advanced oxidation processes are not only difficult to reach discharge index requirement, and processing cost is higher, and enterprise is difficult to bear.
So seeking the group technology that a kind for the treatment of effeciency is high, processing cost is low comes imperative to nanofiltration concentrated water progress advanced treating.
The content of the invention
It is an object of the invention to overcome shortcoming present in prior art there is provided a kind of refuse leachate nanofiltration concentrated water at
Reason method, using iron-carbon micro-electrolysis+Fenton oxidation+catalytic ozonation+catalytic and oxidative electrolysis technology group technology to refuse leachate
Nanofiltration concentrated water is handled:Waste water carries out first oxygen after adding acid for adjusting pH first with the relatively low iron-carbon micro-electrolysis of processing cost
Change, remove most of organic matter；Light electrolysis water outlet adds residual acidity and generation of a certain amount of hydrogen peroxide using light electrolysis unit
Ferrous ion, make reaction system be changed into Fenton oxidation carry out secondary oxidation, further reduce content of organics；Fenton water outlet
Plus alkali pH is adjusted back after flocculation sediment carry out mud-water separation, supernatant enters catalytic ozonation and carries out three oxidations, and ozone exists
Deep oxidation organic matter in the presence of catalyst；Catalytic ozonation water outlet enters catalytic and oxidative electrolysis technology and carries out four oxidations, gives up
Water depth organics removal under the catalytic action of catalyticing anode, while be hypochlorous acid by the chlorion partial electrolyte in water, it is right
Ammonia nitrogen in water carries out oxidation removal, the discharge of catalytic and oxidative electrolysis technology standard water discharge.The technical scheme of use is：A kind of rubbish infiltration
Liquid nanofiltration concentrated water treatment method, it is characterised in that：It the described method comprises the following steps：
Nanofiltration concentrated water is subjected to Primary Oxidation by rail carbon micro-electrolytic processes；
Primary Oxidation water outlet is added after a certain amount of hydrogen peroxide, the rail carbon micro-electrolytic processes residual acidity and its generation is utilized
Ferrous ion, makes reaction system be converted into Fenton oxidation to carry out secondary oxidation；
By water outlet after above-mentioned Fenton oxidation add alkali PH is adjusted back after flocculation sediment carry out mud-water separation, after separation supernatant add it is smelly
VPO catalysts carry out three oxidations；
Catalytic ozonation water outlet carries out electrolytic catalyst and carries out the discharged wastewater met the national standard after four oxidations, catalytic and oxidative electrolysis technology.
The technical characteristic of the present invention also has：The rail carbon micro-electrolytic processes are：
Filler is immersed into nanofiltration concentrated water, and adds sulfuric acid or hydrochloric acid and goes out water ph value after pH value, adjustment to adjust for 3.0-4.0；
Light electrolysis oxidization time is 15-120 minutes.
The technical characteristic of the present invention also has：The filler be iron powder, carbon dust, catalyst, adhesive and pore creating material according to than
Example mixed-forming, is formed through anoxybiotic high-temperature roasting.
The technical characteristic of the present invention also has：The Fenton oxidation technique is：
It is 0.5 ‰ -10 ‰ to add 30% dioxygen water；The Fenton oxidation time is 15-60 minutes.
The technical characteristic of the present invention also has：Water outlet pH adds alkali to pull back to 8.0-9.0 after the Fenton water outlet.
The technical characteristic of the present invention also has：Three oxidation technologies completed by ozone catalyst are：
Catalytic ozonation reactor is tower structure, wherein being filled with ozone special-purpose catalyst, the catalyst is with γ-Al2O3For
Carrier, loads one or more of metal oxides in the elements such as Mn, Cu, Fe, Co, Ce, K, Ce, passes through dipping, roasting and prepares
Form；Ozone dosage is 25-200mg/L；The ozone oxidation time is 30-120 minutes.
The technical characteristic of the present invention also has：Catalytic and oxidative electrolysis technology reactor anode is ti-based coating electrode, and coating material is
PbO2,IrO2,TaO2In one or more；Negative electricity extremely stainless steel electrode or graphite electrode.
The technical characteristic of the present invention also has：Catalytic and oxidative electrolysis technology reactor is square structure, and parallel arranged is extremely in reactor
Few one group of positive and negative pole, positive and negative pole is alternately arranged.
The technical characteristic of the present invention also has：Current density is 5.0-20mA/cm between pole plate, and pole plate spacing is 1-5cm.
The technical characteristic of the present invention also has：The catalytic and oxidative electrolysis technology time is 30-120 minutes.
The beneficial effects of the present invention are：1）It is deep to wastewater treatment.Organic matter complexity in waste water is various, its antioxygen
Change ability is strong and weak different, using iron-carbon micro-electrolysis+Fenton oxidation+catalytic ozonation+catalytic and oxidative electrolysis technology to organic in waste water
Thing " classifying successively " is handled, and improves wastewater treatment depth.
2）Operation is flexible, and anti-water impact capacity is strong.It can be joined according to pending waste water quality flexible operating each unit technique
Number, to ensure stable water outlet qualified discharge.
3）Processing cost is low.First most of organic matter, Ran Houjia are removed using the low rail carbon micro-electrolytic processes of processing cost
Enter hydrogen peroxide, the ferrous ion produced using iron-carbon micro-electrolysis unit is catalyst, and carried out using the acidity of light electrolysis unit
Fenton oxidation, compared with traditional Fenton oxidation, without acid adding and plus ferrous salt；Catalytic ozonation then utilizes the catalysis of catalyst
Ozone dosage is reduced while acting on raising treatment effect；Catalytic and oxidative electrolysis technology unit then make use of electrode coating to be urged
Change oxidation, current density between reduction pole plate, saves power consumption while treatment effect is ensured.So whole set process processing cost
It is low.
Brief description of the drawings
Accompanying drawing 1 is present invention process schematic flow sheet.In Fig. 1：1- iron-carbon micro-electrolysis units；2- Fenton oxidation units；3-
Flocculation sediment unit；4- ozone catalytic oxidation units；5- catalytic and oxidative electrolysis technology units.
Embodiment
Below in conjunction with the accompanying drawings, the embodiment to the present invention is illustrated.The invention discloses a kind of infiltration of rubbish
The processing method of liquid nanofiltration concentrated water, technological process are as shown in figure 1, this method comes dense to refuse leachate nanofiltration by the following means
Water is handled：PH is adjusted to 2.0-3.0 and carried out for the first time into iron-carbon micro-electrolysis unit 1 by pending waste water by acid adding
Oxidation, oxidation reaction 15-120 minutes, acid adding controls water outlet pH 3.0-4.0 in course of reaction, and iron-carbon micro-electrolysis oxidation removal is big
The hydrogen peroxide of water outlet addition 0.5 ‰ -10 ‰ enters the progress secondary oxidation of Fenton oxidation unit 2 after partial organic substances, and waste water is in sweet smell
Oxidization time in oxidation unit 2 is 15-60 minute, and Fenton oxidation water outlet, which is added after alkali lye adjusts back pH to 8.0-9.0, to be entered
Ferric ion formation iron hydroxide flco precipitation in flocculation sediment unit 3, waste water, the discharge of sediment autoreactor bottom, on
Clear liquid enters ozone catalytic oxidation unit 4, in ozone catalytic oxidation unit 4, waste water and 25-200mg/L ozone autoreaction
Device bottom enters, and carries out three oxidations under the catalytic action of catalyst in the reactor, and oxidation enters electrolysis after 30-120 minutes
Catalytic oxidation unit 5, carries out four oxidations, pole plate spacing 1-5cm, current density 5-20 mA/ in the presence of applying direct current
Cm, useless chlorion of Organic substance in water while catalyticing anode is aoxidized in water is electrolysed as hypochlorous acid, and hypochlorous acid is in waste water
Ammonia nitrogen aoxidized, qualified discharge after waste water is aoxidized 30-120 minutes in catalytic and oxidative electrolysis technology unit 5.
Below according to described above, select typical industrial wastewater to deal with objects, carry out specific implementation explanation.
Embodiment 1
The nanofiltration concentrated water produced in certain garbage burning factory refuse leachate processing procedure：COD is 3600mg/L, and salt content is
34000mg/L。
The processing method provided using the present invention is handled：Waste water is by adding sulfuric acid to adjust pH to entering iron after 2.0
Carry out Primary Oxidation in carbon micro-electrolysis unit 1, oxidation reaction 120 minutes, acid adding controls water outlet pH to be 3.0, iron in course of reaction
The hydrogen peroxide that carbon micro-electrolysis water outlet adds 10 ‰ enters the progress secondary oxidation of Fenton oxidation unit 2, and waste water is in Fenton oxidation unit 2
In oxidization time be 60 minutes, Fenton oxidation water outlet add alkali lye readjustment pH to 9.0 after enter flocculation sediment unit 3, waste water
Middle ferric ion formation iron hydroxide flco precipitation, sediment autoreactor bottom discharge, supernatant enters ozone catalytic oxygen
Change unit 4, in ozone catalytic oxidation unit 4, waste water and 200mg/L ozone autoreactor bottom enter, in the reactor
Three oxidations are carried out under the catalytic action of catalyst, oxidation enters catalytic and oxidative electrolysis technology unit 5 after 120 minutes, in external dc
Four oxidations are carried out in the presence of electricity, pole plate spacing 1cm, current density 20mA/cm, the Organic substance in water that gives up are aoxidized in catalyticing anode
While water in chlorion be electrolysed as hypochlorous acid, hypochlorous acid is aoxidized to the ammonia nitrogen in waste water, and waste water is in electrolytic catalysis
Qualified discharge after being aoxidized 120 minutes in oxidation unit 5.
COD is 89mg/L, and salt content is 33500mg/L, and processing cost is 9.8 yuan/m3。
Embodiment 2
The nanofiltration concentrated water produced in certain destructor plant refuse leachate processing procedure：COD is 1600mg/L, and salt content is
21800mg/L。
The processing method provided using the present invention is handled：Waste water is by adding sulfuric acid to adjust pH to entering iron after 2.5
Carry out Primary Oxidation in carbon micro-electrolysis unit 1, oxidation reaction 60 minutes, acid adding controls water outlet pH to be 3.5, iron in course of reaction
The hydrogen peroxide that carbon micro-electrolysis water outlet adds 4 ‰ enters the progress secondary oxidation of Fenton oxidation unit 2, and waste water is in Fenton oxidation unit 2
In oxidization time be 30 minutes, Fenton oxidation water outlet add alkali lye readjustment pH to 8.5 after enter flocculation sediment unit 3, waste water
Middle ferric ion formation iron hydroxide flco precipitation, sediment autoreactor bottom discharge, supernatant enters ozone catalytic oxygen
Change unit 4, in ozone catalytic oxidation unit 4, waste water and 100mg/L ozone autoreactor bottom enter, in the reactor
Three oxidations are carried out under the catalytic action of catalyst, oxidation enters catalytic and oxidative electrolysis technology unit 5 after 60 minutes, in applying direct current
In the presence of carry out four oxidations, pole plate spacing 5cm, current density 10mA/cm, what useless Organic substance in water was aoxidized in catalyticing anode
The chlorion in water is electrolysed as hypochlorous acid simultaneously, and hypochlorous acid is aoxidized to the ammonia nitrogen in waste water, and waste water is in electrolytic catalysis oxygen
Change qualified discharge after being aoxidized 60 minutes in unit 5.
COD is 44mg/L, and salt content is 21600mg/L, and processing cost is 6.0 yuan/m3。
Embodiment 3
The nanofiltration concentrated water produced in certain garbage burning factory refuse leachate processing procedure：COD is 800mg/L, and salt content is
19000mg/L。
The processing method provided using the present invention is handled：Waste water is by adding sulfuric acid to adjust pH to entering iron after 3.0
Carry out Primary Oxidation in carbon micro-electrolysis unit 1, oxidation reaction 30 minutes, acid adding controls water outlet pH to be 4.0, iron in course of reaction
The hydrogen peroxide that carbon micro-electrolysis water outlet adds 2 ‰ enters the progress secondary oxidation of Fenton oxidation unit 2, and waste water is in Fenton oxidation unit 2
In oxidization time be 30 minutes, Fenton oxidation water outlet add alkali lye readjustment pH to 8.0 after enter flocculation sediment unit 3, waste water
Middle ferric ion formation iron hydroxide flco precipitation, sediment autoreactor bottom discharge, supernatant enters ozone catalytic oxygen
Change unit 4, in ozone catalytic oxidation unit 4, waste water and 50mg/L ozone autoreactor bottom enter, and urge in the reactor
Three oxidations are carried out under the catalytic action of agent, oxidation enters catalytic and oxidative electrolysis technology unit 5 after 30 minutes, in applying direct current
Effect is lower to carry out four oxidations, pole plate spacing 5cm, current density 5mA/cm, useless Organic substance in water catalyticing anode aoxidize it is same
Shi Shuizhong chlorion is electrolysed as hypochlorous acid, and hypochlorous acid is aoxidized to the ammonia nitrogen in waste water, and waste water is in catalytic and oxidative electrolysis technology
Qualified discharge after being aoxidized 30 minutes in unit 5.
COD is 24mg/L, and salt content is 18700mg/L, and processing cost is 3.5 yuan/m3。
Claims (10)
1. a kind of refuse leachate nanofiltration concentrated water treatment method, it is characterised in that：It the described method comprises the following steps：
Nanofiltration concentrated water is subjected to Primary Oxidation by rail carbon micro-electrolytic processes；
Primary Oxidation water outlet is added after a certain amount of hydrogen peroxide, the rail carbon micro-electrolytic processes residual acidity and its generation is utilized
Ferrous ion, makes reaction system be converted into Fenton oxidation to carry out secondary oxidation；
By water outlet after above-mentioned Fenton oxidation add alkali PH is adjusted back after flocculation sediment carry out mud-water separation, after separation supernatant add it is smelly
VPO catalysts carry out three oxidations；
Catalytic ozonation water outlet carries out electrolytic catalyst and carries out the discharged wastewater met the national standard after four oxidations, catalytic and oxidative electrolysis technology.
2. according to the processing method described in claim 1, it is characterised in that：The rail carbon micro-electrolytic processes are：
Filler is immersed into nanofiltration concentrated water, and adds sulfuric acid or hydrochloric acid and goes out water ph value after pH value, adjustment to adjust for 3.0-4.0；
Light electrolysis oxidization time is 15-120 minutes.
3. according to the processing method described in claim 2, it is characterised in that：The filler is iron powder, carbon dust, catalyst, bonding
Agent and pore creating material proportionally mixed-forming, are formed through anoxybiotic high-temperature roasting.
4. according to the processing method described in claim 1, it is characterised in that：The Fenton oxidation technique is：
It is 0.5 ‰ -10 ‰ to add 30% dioxygen water；The Fenton oxidation time is 15-60 minutes.
5. according to the processing method described in claim 1, it is characterised in that：Water outlet pH adds alkali to pull back to after the Fenton water outlet
8.0-9.0。
6. according to the processing method described in claim 1, it is characterised in that：Three oxidation technologies completed by ozone catalyst
For：
Catalytic ozonation reactor is tower structure, wherein being filled with ozone special-purpose catalyst, the catalyst is with γ-Al2O3To carry
Body, loads one or more of metal oxides in the elements such as Mn, Cu, Fe, Co, Ce, K, Ce, by dipping, roasting preparation
Into；Ozone dosage is 25-200mg/L；The ozone oxidation time is 30-120 minutes.
7. according to the processing method described in claim 1, it is characterised in that：
Catalytic and oxidative electrolysis technology reactor anode is ti-based coating electrode, and coating material is PbO2,IrO2,TaO2In one kind or several
Kind；Negative electricity extremely stainless steel electrode or graphite electrode.
8. according to the processing method described in claim 7, it is characterised in that：Catalytic and oxidative electrolysis technology reactor is square structure, instead
Parallel arranged at least one set positive and negative pole in device is answered, positive and negative pole is alternately arranged.
9. according to the processing method described in claim 7, it is characterised in that：Current density is 5.0-20mA/cm, pole plate between pole plate
Spacing is 1-5cm.
10. according to the processing method described in claim 7, it is characterised in that：The catalytic and oxidative electrolysis technology time is 30-120 points
Clock.
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| CN107902745A (en) * | 2017-11-30 | 2018-04-13 | 浙江奇彩环境科技股份有限公司 | A kind of processing method of landfill leachate thick water |
| CN108249643A (en) * | 2018-02-09 | 2018-07-06 | 山东奥美环境股份有限公司 | A kind of three embrane method seaweed processing waste water advanced treatment and reclamation methods and device |
| CN109761416A (en) * | 2019-03-07 | 2019-05-17 | 山东泰禾环保科技股份有限公司 | Garbage leachate treatment process and its processing unit |
| CN109809535A (en) * | 2019-03-26 | 2019-05-28 | 中国地质大学（北京） | A kind of reactor and method handling landfill leachate reverse osmosis concentrated liquid |
| CN110586126A (en) * | 2019-09-29 | 2019-12-20 | 威海中远造船科技有限公司 | Catalyst and method for sewage treatment at normal temperature and normal pressure |
| CN111718040A (en) * | 2020-06-09 | 2020-09-29 | 上海老港废弃物处置有限公司 | Method for preparing deodorant by electrolyzing concentrated solution of nanofiltration percolate of garbage |
| CN111875126A (en) * | 2020-08-05 | 2020-11-03 | 深圳市尚用来环保科技有限公司 | Garbage leachate treatment method for garbage transfer station |
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