CN109607970A - Method for treating garbage percolation liquid and garbage percolation liquid treating system - Google Patents
Method for treating garbage percolation liquid and garbage percolation liquid treating system Download PDFInfo
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- CN109607970A CN109607970A CN201910029940.6A CN201910029940A CN109607970A CN 109607970 A CN109607970 A CN 109607970A CN 201910029940 A CN201910029940 A CN 201910029940A CN 109607970 A CN109607970 A CN 109607970A
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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
- C02F1/46—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
- 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
- C02F2101/30—Organic 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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
Abstract
The invention discloses a kind of method for treating garbage percolation liquid and garbage percolation liquid treating systems.The method for treating garbage percolation liquid includes the following steps: that being passed through chlorine to the landfill leachate of collection is pre-processed, and obtains the first treatment fluid；First treatment fluid is subjected to electric Fenton oxidation processing, obtains second processing liquid；The second processing liquid is subjected to biochemical degradation processing, obtains third treatment fluid；The third treatment fluid is subjected to electro-catalysis processing.The method for treating garbage percolation liquid and the garbage percolation liquid treating system are successively handled landfill leachate by sequence, so that the COD of waste leachate, ammonia-nitrogen content after processing are low, reach discharge standard, and secondary pollution is not present.
Description
Technical field
The invention belongs to technical field of waste water processing, in particular at a kind of method for treating garbage percolation liquid and landfill leachate
Reason system.
Background technique
Landfill leachate is rubbish during stacking and landfill, since fermentation of materials, rain drop erosion and underground water impregnate
And a kind of high concentrated organic wastewater being percolated out, water quality are complicated, environmental hazard is big.
Landfill leachate has biggish difference, COD (Chemical with region, industry, the difference for filling the time, ingredient
Oxygen Demand, COD), ammonia nitrogen also have larger difference, COD can arrive 1700mg/L up to 90000mg/L, ammonia nitrogen,
And there is stink, increase the difficulty of operation operation.
Currently, the method for processing landfill leachate mainly has recharge method, biological treatment, materialization treatment process and land treatment systems
Method etc..Although recharge method reduces COD, but since the degradation of nitrogenous compound increases 30% total nitrogen concentration, is a kind of non-
Thorough processing method；When Anaerobic Treatment, when load increase to a certain extent after, removal rate can degradation；It is oxidizing
The amount that method needs to be oxidized agent is larger；Evaporative distillation will appear the problem of dirt and fouling.Materialization treatment process includes membrane technology, film skill
Art is to be retained the pollutant in waste water by the membrane modules such as micro-filtration, nanofiltration, ultrafiltration, reverse osmosis, is purified water to reach
Purpose.But membrane module maintenance, replacement frequently, cleaning it is difficult, easily blocking, treating capacity fluctuation is larger, operating cost is high, while at film
The concentrated water that reason generates is difficult to handle, and is easy to produce secondary pollution.
Therefore, the processing equipment of existing various landfill leachates, processing capacity is poor, inefficient, effluent quality
COD, ammonia nitrogen and total phosphorus cannot reach discharge standard or there are secondary pollutions.Research and probe is efficiently, economical, satisfaction is new discharges
The problem of garbage leachate treatment process and device of standard are urgent need to resolve in garbage loading embeading treatment process.
Summary of the invention
It is an object of the invention to overcome the above-mentioned deficiency of the prior art, a kind of method for treating garbage percolation liquid and rubbish are provided
Rubbish percolation liquid treating system, to solve processing capacity and efficiency existing for the existing method for handling landfill leachate and related device
Undesirable, discharge water cannot reach discharge standard or there are the technical problems such as secondary pollution.
In order to realize that goal of the invention of the invention, one aspect of the present invention provide a kind of method for treating garbage percolation liquid, wrap
Include following steps:
Chlorine is passed through to the landfill leachate of collection to be pre-processed, and the first treatment fluid is obtained；
First treatment fluid is subjected to electric Fenton oxidation processing, obtains second processing liquid；
The second processing liquid is subjected to biochemical degradation processing, obtains third treatment fluid；
The third treatment fluid is subjected to electro-catalysis processing.
Another aspect of the present invention provides a kind of garbage percolation liquid treating system.The garbage percolation liquid treating system
Including landfill leachate pretreatment unit, electric Fenton oxidation processing unit, biochemical degradation processing unit and electro-catalysis processing unit,
And the landfill leachate pretreatment unit landfill leachate progress pretreated landfill leachate of chlorine is directed into it is described
Electric Fenton oxidation processing unit, the electricity Fenton oxidation processing unit will treated that landfill leachate imports through electric Fenton oxidation
The biochemical degradation processing unit, the biochemical degradation processing unit will import institute through biochemical degradation treated landfill leachate
State electro-catalysis processing unit.
Compared with prior art, method for treating garbage percolation liquid of the present invention is successively handled landfill leachate by sequence,
So that the COD of waste leachate, ammonia-nitrogen content after processing are low, reach discharge standard, and secondary pollution is not present.
Garbage percolation liquid treating system of the present invention will include that landfill leachate pre-processes according to garbage leachate treatment process
Device, electric Fenton oxidation processing unit, biochemical degradation processing unit and electro-catalysis processing unit are sequentially connected composition garbage filter
Liquid treating system, in this way, the garbage percolation liquid treating system can effectively drop COD, the ammonia-nitrogen content in landfill leachate
It is low, reach discharge standard, and not will cause secondary pollution.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is the process flow diagram of method for treating garbage percolation liquid of the embodiment of the present invention；
Fig. 2 is garbage percolation liquid treating system of embodiment of the present invention structural schematic diagram.
Specific embodiment
In order to which technical problems, technical solutions and advantageous effects to be solved by the present invention are more clearly understood, below in conjunction with
Embodiment and attached drawing, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein only to
It explains the present invention, is not intended to limit the present invention.
On the one hand, the embodiment of the invention provides a kind of method for treating garbage percolation liquid.The landfill leachate treatment side
The process flow of method is as shown in Figure 1, it includes the following steps:
S01: being passed through chlorine to the landfill leachate of collection and pre-processed, and obtains the first treatment fluid；
S02: first treatment fluid is subjected to electric Fenton oxidation processing, obtains second processing liquid；
S03: the second processing liquid is subjected to biochemical degradation processing, obtains third treatment fluid；
S04: the third treatment fluid is subjected to electro-catalysis processing.
Wherein, in the step S01, after being passed through chlorine into the landfill leachate, the chlorine through jet stream into
Enter pretreatment tank, chlorine reacts with ammonium root, the ammonia nitrogen concentration content of the landfill leachate is effectively reduced.It is such as real one
Apply in example, be passed through chlorine carry out pretreatment duration be until the landfill leachate in ammonia nitrogen be down to 100mg/L with
Under, it that is to say the ammonia nitrogen concentration 100mg/L or less in first treatment fluid.
In addition, the chlorine intake should be it is enough, such as in one embodiment, chlorine according to per unit volume institute
The chlorine for being passed through 0.1-0.3 volume in landfill leachate is stated, that is to say that chlorine is passed through the rubbish according to the ratio of 10-30%v/v
In rubbish percolate.
In a further embodiment, the chlorine in the step S01 is prepared as follows acquisition, that is to say the rubbish
Rubbish leachate processing method further includes following steps:
The part of the collection landfill leachate is imported in electrolytic cell, villaumite is added and carries out electrolysis processing, and will generate
Chlorine import the remaining landfill leachate and carry out the pretreatment.
Wherein, the villaumite additional amount is added in the landfill leachate according to the concentration of 0.05%wt-2%wt, specifically
In embodiment, the villaumite can with but not only sodium chloride, can also be other villaumites, the preferably chlorine of environmental sound certainly
Salt.Such as voltage condition of the electrolysis processing can be configured according to the condition of conventional electrolysis chlorine.The electrolysis processing
Time can be the molar concentration of the hypochlorite ion in the electrolytic cell and drop to 5% or less.
After molar concentration to the hypochlorite ion in the electrolytic cell drops to 5% or less, preferably by electrolytic cell
In electrolyte that is to say after the landfill leachate after being electrolysed is mixed with third treatment fluid described in step S03 and
The electro-catalysis processing in step S04 is carried out, so that all landfill leachates being collected are finally reached discharge mark
It is quasi-.
The landfill leachate in the step S01, which can be, handles the landfill leachate collected according to conventional spam.
Therefore, the landfill leachate contains COD and ammonia nitrogen of high concentration etc..
In the step S02, first treatment fluid is subjected to electric Fenton oxidation processing to realize the content for reducing COD.
In one embodiment, the method for the electric Fenton oxidation processing is microwave electro-fenton process.That is to say will be first described in step S01
Treatment fluid is placed in microwave-electricity Fenton environment, and under microwave action, anode generates rapidly ferrous iron, and cathode generates rapidly dioxygen,
The two reacts to form reactive hydroxyl radical, to reduce the content of the COD in the first treatment fluid.In one embodiment, institute
The time for stating the processing of electric Fenton oxidation is to that is to say described the until COD content in first treatment fluid is lower than 500mg/L
COD content in two treatment fluids is lower than 500mg/L.Macromolecule organic is oxidized to small organic molecule simultaneously, so that B/C ratio
It improves to 0.45 or more.
In the step S03, the second processing liquid, which carries out biochemical degradation processing, be that is to say by described in microbial degradation
The COD content in the second processing liquid is effectively reduced in second processing liquid.In one embodiment, the biochemical degradation is handled
Time is until the COD content in the second processing liquid is lower than 100mg/L, and ammonia nitrogen is down to 25mg/L hereinafter, that is to say described
COD content in third treatment fluid is lower than 100mg/L, and ammonia nitrogen is down to 25mg/L or less.Wherein, biochemical degradation processing can be with
Including aerobic biochemical degradation treatment and/or anaerobic biological degradation treatment.
In the step S04, the third treatment fluid is handled by the electro-catalysis, under catalyst and electric field action,
Further decrease the content of the COD and ammonia nitrogen in the third treatment fluid, such as in one embodiment, electro-catalysis processing when
Between be that the COD in the third treatment fluid is down to 50mg/L hereinafter, ammonia nitrogen is down to 15mg/L or less.In one embodiment, institute
State electro-catalysis processing in, in Xiang Suoshu third treatment fluid add catalyst amount be according to catalyst in the third treatment fluid
Concentration is that 3g/L-15g/L is added in the third treatment fluid.In a particular embodiment, the catalyst includes chloro-iridic acid catalysis
Agent or at least one of expanded graphite or chlorate.In another embodiment, the electro-catalysis processing electro-catalysis condition is electricity
Current density is 50-400A/m2, best 200A/m2。
By above-mentioned method for treating garbage percolation liquid it is found that by the landfill leachate of collection successively by pretreatment, electricity
Fenton oxidation processing, biochemical degradation processing and electro-catalysis processing, are effectively reduced COD, ammonia-nitrogen content in the landfill leachate,
The content of phosphorus can also be reduced simultaneously, so that the landfill leachate after processed reaches discharge standard, and there is no secondary
Pollution.
On the other hand, it is based on method for treating garbage percolation liquid described above, the embodiment of the invention also provides a kind of rubbish
Percolation liquid treating system.The garbage percolation liquid treating system is as shown in Figure 2 comprising landfill leachate pretreatment unit 2, electricity
Fenton oxidation processing unit 3, biochemical degradation processing unit 4 and electro-catalysis processing unit 5.
Wherein, the landfill leachate pretreatment unit 2 by landfill leachate carry out pretreated landfill leachate (
It is the first treatment fluid in method for treating garbage percolation liquid step S01 above) it is directed into the electric Fenton oxidation processing unit 3
In.In one embodiment, the landfill leachate pretreatment unit 2 may include for contain landfill leachate pretreatment tank and
The outlet of the entrance of the landfill leachate and the landfill leachate, the landfill leachate are passed through institute by the entrance
State pretreatment tank, after the chlorine through being passed through is pre-processed, by the outlet by landfill leachate after pretreatment (
It is the first treatment fluid described above) it is directed into the electric Fenton oxidation processing unit 3.Wherein, it is passed through the garbage filter
The pretreatment that landfill leachate carries out in the landfill leachate pretreatment unit 2 in liquid pretreatment unit 2 is described above
Pretreatment in method for treating garbage percolation liquid in step S01.In a particular embodiment, the landfill leachate pretreatment unit
2 can directly be pretreatment tank.
The electricity Fenton oxidation processing unit 3 will treated that landfill leachate (that is to say rubbish above through electric Fenton oxidation
Second processing liquid in rubbish leachate processing method step S02) it imports in the biochemical degradation processing unit 4, in an embodiment
In, the electricity Fenton oxidation processing unit 3 may include the electric Fenton oxidation slot and the rubbish for containing landfill leachate
The outlet of the entrance of percolate and the landfill leachate, the landfill leachate after pretreatment (that is to say institute above
State the first treatment fluid) the electric Fenton oxidation slot is passed through by the entrance, it is handled through electric Fenton reagent or microwave electro-fenton process
Afterwards, the landfill leachate handled through electric Fenton oxidation (that is to say second processing liquid described above) is imported by the outlet
To in the biochemical degradation processing unit 4.Wherein, rubbish infiltration after pretreatment is passed through in the electric Fenton oxidation processing unit 3
The electric Fenton oxidation processing that filtrate carries out in the electric Fenton oxidation processing unit 3 is landfill leachate treatment side described above
Electric Fenton oxidation processing in method in step S02.In a particular embodiment, the electric Fenton oxidation processing unit 3 can be often
Advise electric Fenton oxidation treatment trough or microwave electricity Fenton slot, preferably microwave electricity Fenton slot.
The biochemical degradation processing unit 4 (will that is to say that rubbish above seeps through biochemical degradation treated landfill leachate
Third treatment fluid in filtrate process method step S03) it imports in the electro-catalysis processing unit 5.In one embodiment, described
Biochemical degradation processing unit 4 may include the entrance of the biochemical degradation slot and the landfill leachate for containing landfill leachate
With the outlet of the landfill leachate, through electric Fenton oxidation, treated that the landfill leachate (that is to say described above
Two treatment fluids) biochemical degradation slot is passed through by the entrance, after biodegrade processing, it will be dropped through biochemistry by the outlet
Treated that landfill leachate (that is to say third treatment fluid described above) is directed into the electro-catalysis processing unit 5 for solution.Its
In, it is passed through in the biochemical degradation processing unit 4 through electric Fenton oxidation treated landfill leachate at the biochemical degradation
The biochemical degradation processing carried out in reason device 4 is the biochemical degradation in method for treating garbage percolation liquid described above in step S03
Processing.In a particular embodiment, the biochemical degradation processing unit 4 can directly be biochemical degradation slot, at biochemical degradation
Manage type such as aerobic biochemical degradation treatment and/or anaerobic biological degradation treatment.The biochemical degradation slot can be aerobic biochemical drop
Solution slot or anaerobic biological degradation groove or the biochemical degradation slot include aerobic biochemical degradation groove and anaerobic biological degradation groove,
The electricity Fenton oxidation processing unit 3 will treated that landfill leachate imports the aerobic biochemical degradation groove through electric Fenton oxidation
Or import in anaerobic biological degradation groove, then corresponding, the anaerobic biological degradation groove or aerobic biochemical degradation groove will be through biochemistry
The landfill leachate of degradation imports in the electro-catalysis processing unit 5.
The electro-catalysis processing unit 5 will treated that landfill leachate can be handled with direct emission through electro-catalysis.Having
In body embodiment, the electro-catalysis processing unit 5 can oneself be electro-catalysis slot.
In a further embodiment, the garbage percolation liquid treating system in the various embodiments described above further includes electrolytic cell 6,
The electrolytic cell 6 includes the gas communication component 7 for generating chlorine by electrolysis for water conservancy diversion, and the gas communication component 7 will be described
Chlorine is directed into the landfill leachate being installed in the landfill leachate pretreatment unit 2, is realized described to garbage filter
The pretreatment of liquid.In a particular embodiment, the gas communication component 7 can be the pipeline suitable for chlorine gas transfer, further band
There is the pipeline suitable for chlorine gas transfer of control valve.
Further, the electrolytic cell 6 further includes fluid communication component 8, and the fluid communication component 8 is by the electrolysis
Electrolyte in slot 6 is directed into electro-catalysis processing unit 5 so that electrolyte with it is biochemical through the biochemical degradation processing unit 4
Landfill leachate (that is to say third treatment fluid described above) mixing after degradation treatment, and through the electro-catalysis processing unit
5 carry out electro-catalysis processing, conductive wastewater discharge standard.In a particular embodiment, the fluid communication component 8 can be electrolyte
The pipeline of conveying, the pipeline that further electrolyte with control valve conveys.
In a further embodiment, the garbage percolation liquid treating system in the various embodiments described above further includes garbage filter
Liquid collecting pit, landfill leachate collecting pit 1 as shown in Figure 2, the landfill leachate collecting pit 1 is by part landfill leachate
It imports in the electrolytic cell 6 and carries out electrolysis processing, remainder landfill leachate is imported in landfill leachate pretreatment unit 2
It is pre-processed.
In addition, each device in the various embodiments described above, such as the landfill leachate collecting pit 1, landfill leachate pre-process
It can between device 2, electric Fenton oxidation processing unit 3, biochemical degradation processing unit 4 and electro-catalysis processing unit 5 and electrolytic cell 6
To be connected to by pipeline.
It can be seen from the above, garbage percolation liquid treating system will be wrapped according to garbage leachate treatment process in each embodiment above
It includes each device as shown in Figure 1 and is sequentially connected composition garbage percolation liquid treating system, in this way, the landfill leachate treatment system
System can effectively reduce COD, the ammonia-nitrogen content in landfill leachate, reach discharge standard, and not will cause secondary pollution.
It is illustrated below by way of multiple specific embodiments real using garbage percolation liquid treating system of the embodiment of the present invention
Processing method now is carried out to landfill leachate.
Embodiment 1
The present embodiment provides a kind of method for treating garbage percolation liquid.In conjunction with Fig. 1 and 2, the method for treating garbage percolation liquid
Include the following steps:
S11. the landfill leachate part collected to landfill leachate collecting pit 1 imports landfill leachate pretreatment unit 2,
Part imports in electrolytic cell 6, and sodium chloride is added into electrolytic cell 6 and carries out electrolysis processing, and the chlorine of generation is passed through flue
It is pre-processed in the landfill leachate that road 7 is directed into landfill leachate pretreatment unit 2, until pretreated rubbish seeps
COD is down to 1450mg/L in filtrate, and ammonia nitrogen is down to 92mg/L, obtains the first treatment fluid；Wherein, shown landfill leachate is from wide
The refuse landfill in eastern somewhere, measuring the Landfill Leachate Production is 500t/d, and the COD in the landfill leachate is dense
Degree is 1725mg/L, ammonia nitrogen concentration 1450mg/l；
S12. first treatment fluid is directed into electric Fenton oxidation processing unit 3 and is carried out at microwave electricity Fenton oxidation
Reason, until COD is down to 380mg/L in percolate, ammonia nitrogen is down to 75mg/L, obtains second processing liquid；Wherein, the microwave electricity is fragrant
The process conditions for oxidation processes of pausing are 60A/m2；
S13. the second processing liquid is directed into progress biochemical degradation processing in biochemical degradation processing unit 4, until seeping
COD is down to 90mg/L in filtrate, and ammonia nitrogen is reduced to 45mg/L, obtains third treatment fluid；
S14. the third treatment fluid is directed into electro-catalysis processing unit 5, while in electrolytic cell 6 in step S11
After sodium hypochlorite concentration contained by electrolyte reaches 5% or so, electrolyte is directed into electro-catalysis processing unit by conductive member 8
Carry out mixed processing with the third treatment fluid in 5, and carry out electro-catalysis processing, until in percolate COD be down to 50mg/L with
Under, ammonia nitrogen carries out emission treatment after being down to 15mg/L or less；Wherein, the process conditions of the electro-catalysis processing are 200A/m2。
Embodiment 2
The present embodiment provides a kind of method for treating garbage percolation liquid.In conjunction with Fig. 1 and 2, the method for treating garbage percolation liquid
Include the following steps:
S11. Guangzhou factory landfill leachate 300m/d, COD1750mg/L, ammonia nitrogen 1780mg/L, pH8.75, total phosphorus
3.47mg/L；The landfill leachate part collected to landfill leachate collecting pit 1 imports landfill leachate pretreatment unit 2, portion
Divide and import in electrolytic cell 6, and sodium chloride is added into electrolytic cell 6 and carries out electrolysis processing, the chlorine of generation is passed through into gas pipeline 7
It is pre-processed in the landfill leachate being directed into landfill leachate pretreatment unit 2, until pretreated garbage filter
COD is down to 1685mg/L in liquid, and ammonia nitrogen is down to 56mg/L, obtains the first treatment fluid；
S12. first treatment fluid is directed into electric Fenton oxidation processing unit 3 and is carried out at microwave electricity Fenton oxidation
Reason, until COD is down to 267mg/L in percolate, ammonia nitrogen is down to 48.5mg/L, obtains second processing liquid；Wherein, the microwave electricity
The process conditions of Fenton oxidation processing are 80A/m2；
S13. the second processing liquid is directed into progress biochemical degradation processing in biochemical degradation processing unit 4, until seeping
COD is down to 54mg/L in filtrate, and ammonia nitrogen is reduced to 8.3mg/L, obtains third treatment fluid；
S14. the third treatment fluid is directed into electro-catalysis processing unit 5, while in electrolytic cell 6 in step S11
After sodium hypochlorite concentration contained by electrolyte reaches 5% or so, electrolyte is directed into electro-catalysis processing unit by conductive member 8
Mixed processing is carried out with the third treatment fluid in 5, and carries out electro-catalysis processing, COD is down to 31.5mg/L, and ammonia nitrogen is down to
1.21mg/L discharge；Wherein, the process conditions of the electro-catalysis processing are 200A/m2。
Embodiment 3
The present embodiment provides a kind of method for treating garbage percolation liquid.In conjunction with Fig. 1 and 2, the method for treating garbage percolation liquid
Include the following steps:
S11. Hunan factory landfill leachate 500m/d, COD8650mg/L, ammonia nitrogen 2690mg/L；It is received to landfill leachate
Collect the landfill leachate part that pond 1 is collected and import landfill leachate pretreatment unit 2, part imports in electrolytic cell 6, and to electrolysis
Sodium chloride is added in slot 6 and carries out electrolysis processing, the chlorine of generation is directed into landfill leachate pretreatment dress by gas pipeline 7
It sets in the landfill leachate in 2 and is pre-processed, until COD is down to 6724mg/L, ammonia nitrogen in pretreated landfill leachate
It is down to 96mg/L, obtains the first treatment fluid；
S12. first treatment fluid is directed into electric Fenton oxidation processing unit 3 and is carried out at microwave electricity Fenton oxidation
Reason, until COD is down to 278mg/L in percolate, ammonia nitrogen is down to 38mg/L, obtains second processing liquid；Wherein, the microwave electricity is fragrant
The process conditions for oxidation processes of pausing are 80A/m2；
S13. the second processing liquid is directed into progress biochemical degradation processing in biochemical degradation processing unit 4, until seeping
COD is down to 72mg/L in filtrate, and ammonia nitrogen is reduced to 4.8mg/L, obtains third treatment fluid；
S14. the third treatment fluid is directed into electro-catalysis processing unit 5, while in electrolytic cell 6 in step S11
After sodium hypochlorite concentration contained by electrolyte reaches 5% or so, electrolyte is directed into electro-catalysis processing unit by conductive member 8
Mixed processing is carried out with the third treatment fluid in 5, and carries out electro-catalysis processing, COD is down to 36.4mg/L, and ammonia nitrogen is down to
1.53mg/L discharge；Wherein, the process conditions of the electro-catalysis processing are 250A/m2。
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (9)
1. a kind of method for treating garbage percolation liquid, includes the following steps:
Chlorine is passed through to the landfill leachate of collection to be pre-processed, and the first treatment fluid is obtained；
First treatment fluid is subjected to electric Fenton oxidation processing, obtains second processing liquid；
The second processing liquid is subjected to biochemical degradation processing, obtains third treatment fluid；
The third treatment fluid is subjected to electro-catalysis processing.
2. method for treating garbage percolation liquid according to claim 1, which is characterized in that further include following steps:
The part of the collection landfill leachate is imported in electrolytic cell, villaumite is added and carries out electrolysis processing, and by the chlorine of generation
Conductance enters the remaining landfill leachate and carries out the pretreatment.
3. method for treating garbage percolation liquid according to claim 2, which is characterized in that hypochlorite in slot to be electrolysed from
After the molar concentration of son drops to 5% or less, after the electrolyte in electrolytic cell is mixed with the third treatment fluid and carry out
The electro-catalysis processing.
4. method for treating garbage percolation liquid according to claim 1, it is characterised in that: the side of the electricity Fenton oxidation processing
Method is microwave electro-fenton process.
5. method for treating garbage percolation liquid according to claim 1-4, it is characterised in that:
The pretreated time is until the ammonia nitrogen in the landfill leachate is down to 100mg/L or less；And/or
The time of the electricity Fenton oxidation processing is until the COD content in first treatment fluid is lower than 500mg/L, B/C ratio
It improves to 0.45 or more；And/or
The time of the biochemical degradation processing is until the COD content in the second processing liquid is lower than 100mg/L, and ammonia nitrogen is down to
25mg/L or less；And/or
The time of the electro-catalysis processing is until the COD content in the third treatment fluid is lower than 50mg/L, and ammonia nitrogen is down to
15mg/L or less.
6. a kind of garbage percolation liquid treating system, it is characterised in that: at landfill leachate pretreatment unit, electric Fenton oxidation
Manage device, biochemical degradation processing unit and electro-catalysis processing unit；
Landfill leachate is carried out pretreated landfill leachate and is directed into the electricity by the landfill leachate pretreatment unit
Fenton oxidation processing unit, the electricity Fenton oxidation processing unit will treated that landfill leachate imports institute through electric Fenton oxidation
State biochemical degradation processing unit, the biochemical degradation processing unit will treated described in landfill leachate imports through biochemical degradation
Electro-catalysis processing unit.
7. garbage percolation liquid treating system according to claim 6, it is characterised in that: it further include electrolytic cell, the electrolysis
Slot includes the gas communication component for generating chlorine by electrolysis for water conservancy diversion, and the chlorine is directed into dress by the gas communication component
In the landfill leachate in the landfill leachate pretreatment unit.
8. garbage percolation liquid treating system according to claim 7, it is characterised in that: the electrolytic cell further includes that liquid is led
Electrolyte in the electrolytic cell is directed into electro-catalysis processing unit by logical component, the fluid communication component.
9. according to the described in any item garbage percolation liquid treating systems of claim 6-8, it is characterised in that: the electricity Fenton oxidation
Processing unit is microwave electricity Fenton device.
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| CN110697977A (en) * | 2019-10-09 | 2020-01-17 | 湖南润万环保科技有限公司 | Treatment process of landfill closure leachate |
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