CN110330157A - A kind of processing method and system of waste landfill site leachate - Google Patents

A kind of processing method and system of waste landfill site leachate Download PDF

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Publication number
CN110330157A
CN110330157A CN201910492946.7A CN201910492946A CN110330157A CN 110330157 A CN110330157 A CN 110330157A CN 201910492946 A CN201910492946 A CN 201910492946A CN 110330157 A CN110330157 A CN 110330157A
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CN
China
Prior art keywords
ammonia
leachate
site
nanofiltration membrane
processing method
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Pending
Application number
CN201910492946.7A
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Chinese (zh)
Inventor
江景杰
谭勇
古创
张�林
朱浩
马法跃
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Everbright Envirotech China Ltd
Everbright Environmental Protection Research Institute Nanjing Co Ltd
Original Assignee
Everbright Envirotech China Ltd
Everbright Environmental Protection Research Institute Nanjing Co Ltd
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Application filed by Everbright Envirotech China Ltd, Everbright Environmental Protection Research Institute Nanjing Co Ltd filed Critical Everbright Envirotech China Ltd
Priority to CN201910492946.7A priority Critical patent/CN110330157A/en
Publication of CN110330157A publication Critical patent/CN110330157A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/02Treatment of water, waste water, or sewage by heating
    • C02F1/04Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/048Purification of waste water by evaporation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/442Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/06Contaminated groundwater or leachate

Abstract

The present invention provides a kind of processing method and system of waste landfill site leachate, the processing system includes ammonia steaming system, dish tubular nanofiltration membrane system and nanofiltration membrane system, ammonia steaming system is used to remove the ammonia nitrogen in the Leachate site of refuse landfill generation, to generate gaseous ammonia and on-condensible gas;Dish tubular nanofiltration membrane system is for handling the Leachate site after the ammonia steaming system removal of ammonia and nitrogen, to reduce the first kind polluter in the Leachate site, generates first and produces water and the first concentrate;Nanofiltration membrane system is used to handle the first production water, generates the second production water and the second concentrate to reduce the second pollutant matter in the first production water.The ammonia steaming system occupied area of the processing method and system of the waste landfill site leachate of the embodiment of the present invention is small, the capital cost of biochemical system construction can effectively be saved, the ammonia nitrogen concentration in Leachate site can be effectively reduced, and the gaseous ammonia of generation can be recycled and be utilized, realize recycling.

Description

A kind of processing method and system of waste landfill site leachate
Technical field
The present invention relates to technical field of waste treatment, in particular to a kind of processing method of waste landfill site leachate And system.
Background technique
It is in all parts of the country to have built large quantities of city life garbage landfills in succession since early 1990s, and according to Whether engineering measure is complete, can environmental protection standard meet to judge, can be classified as Mini nutritionalassessment, controlled landfill yard and health Landfill yard three grades.Because of the presence of refuse landfill, necessarily lead to the refuse landfill of a kind of high-enriched organics, high ammonia nitrogen Leachate site, chemical characteristic and landfill yard waste component, land-fill method, the landfill close phase such as the time limit and landfill yard environmental condition It closes.
With gradually increasing for the landfill yard landfill time limit, Leachate site often shows high ammonia nitrogen (NH3-N), total nitrogen (TN), low organic concentration (COD), low ratio of carbon to ammonium (C/N), low B/C (BOD/COD) feature.Such pollution is handled at home Substance mainly faces following difficult point: 1) how to select reasonable, economic, limited group technology;2) percolate processing how is improved The nitrogen removal rate of technique;3) how to give full play to the maximum processing capability of prior art and guarantee the stable operation of system;4) How under the premise of guaranteeing treatment effect, the processing cost of Leachate site is reduced.
At this stage, generally heavy using mechanical filter and coagulation in the market in more mature garbage leachate processing technique Shallow lake pre-processes Leachate site, is made using anaerobic reactor or high load capacity bioreactor, aerobic membrane bioreactor (MBR) For biological treatment main process, " nanofiltration+reverse osmosis " is used as advanced treatment process." pretreatment+biochemical treatment+bi-membrane method (nanofiltration + it is reverse osmosis) " treatment process because its outlet effect it is good, integration degree is high, it has also become Landfill processing mainstream combination Technique has more application case.
However, in traditional " pretreatment+biological treatment+bi-membrane method (NF+RO) " treatment process processing Landfill, Biochemical system need to build large-scale reaction tank or reactor tank, degrade to ensure to have in biochemical system enough residence times and seep drip The polluters such as organic matter, ammonia nitrogen, the total nitrogen of liquid result in the problems such as system footprint area is big and capital cost is high.With rubbish The increase for filling the time limit, ammonia nitrogen concentration can be higher and higher in Leachate site, carbon-nitrogen ratio will growth that is uncoordinated and influencing microorganism, Cause its processing difficulty to increase, for the degradation for effectively improving nitrogen in biochemical system, need thereto supplementary carbon source (glucose, Sodium acetate, methanol etc.), the carbon source higher cost of supplement and a large amount of spoil disposal of sludge concentration needs to maintain biochemical system, and There are problems that biochemical sludge disposition.In addition, removing in Leachate site ammonia nitrogen and total using the nitrification and denitrification of biochemical system Nitrogen, and the nitrogen that biochemical system generates all is emitted into atmosphere, is unfavorable for the recycling of Nitrogen Resource.
Therefore, presence in view of the above problems, the present invention propose a kind of processing method of new waste landfill site leachate And system.
Summary of the invention
In order to solve the above-mentioned technical problem, one aspect of the present invention provides a kind of processing system of waste landfill site leachate, The processing system includes:
Ammonia steaming system, the ammonia nitrogen in Leachate site for removing refuse landfill generation, to generate gaseous ammonia and fixed gas Body;
Dish tubular nanofiltration membrane system, for handling the Leachate site after the ammonia steaming system removal of ammonia and nitrogen, with drop First kind polluter in the low Leachate site generates first and produces water and the first concentrate;
Nanofiltration membrane system, it is dirty to reduce the second class in the first production water for handling the first production water It contaminates substance and generates the second production water and the second concentrate.
Illustratively, the dish tubular nanofiltration membrane system is also used to dense by the first of dish tubular nanofiltration membrane system generation The recharge of contracting liquid is to the refuse landfill.
Illustratively, the second Concentrated liquid recharge that the nanofiltration membrane system is also used to generate the nanofiltration membrane system is to institute State dish tubular nanofiltration membrane system.
Illustratively, the processing system further include:
Regulating system, the water quality and water of the Leachate site for adjusting refuse landfill generation;
Pretreatment system, for handling the Leachate site after regulating system adjusting to retain the in the Leachate site Three classes polluter;
Steam replenishment system, for supplementing saturated vapor into the ammonia steaming system;
The ammonia steaming system is used to remove the ammonia nitrogen through in the pretreatment system treated Leachate site, to generate gaseous state Ammonia and on-condensible gas.
Illustratively, the processing system further include:
Ammonia absorption device connects the ammonia steaming system, and the gaseous ammonia for generating the ammonia steaming system turns Turn to solid-state or liquid;And/or
On-condensible gas processing system, for handling the on-condensible gas.
Illustratively, the first kind polluter includes at least one of organic matter, coloration and divalent ion;With/ Or
The second pollutant matter includes organic matter;And/or
The third pollutant matter includes at least one of particulate matter, fiber and suspended matter.
Further aspect of the present invention provides a kind of processing method of waste landfill site leachate, the treating method comprises:
The ammonia nitrogen in the Leachate site that refuse landfill generates is removed, to generate gaseous ammonia and on-condensible gas;
Leachate site after removal of ammonia and nitrogen is handled, to reduce the first kind polluter in the Leachate site, is generated First produces water and the first concentrate;
The first production water is handled, generates the second production to reduce the second pollutant matter in the first production water Water and the second concentrate.
Illustratively, the processing method further include:
By first Concentrated liquid recharge to the refuse landfill.
Illustratively, the processing method is applied to the processing system of waste landfill site leachate, the processing system packet Dish tubular nanofiltration membrane system is included, the processing method is further comprising the steps of:
By second Concentrated liquid recharge to the dish tubular nanofiltration membrane system.
Illustratively, the ammonia nitrogen in the Leachate site that the removing refuse landfill generates, to generate gaseous ammonia and not coagulate Before the step of gas, the processing method is further comprising the steps of:
Adjust the water quality and water of the Leachate site that refuse landfill generates;
Leachate site after processing adjusting is to retain the third pollutant matter in the Leachate site.
Illustratively, the processing method is further comprising the steps of:
Solid-state or liquid are converted by the gaseous ammonia;And/or
The on-condensible gas is handled.
Illustratively, the first kind polluter includes at least one of organic matter, coloration and divalent ion;With/ Or
The second pollutant matter includes organic matter;And/or
The third pollutant matter includes at least one of particulate matter, fiber and suspended matter.
In conclusion the processing method and system of the waste landfill site leachate of the embodiment of the present invention it include following excellent Point:
1) ammonia steaming system occupied area is small, it is only necessary to based on equipment provide basis, can effectively save biochemistry The capital cost of system building;
2) ammonia nitrogen concentration in Leachate site can be effectively reduced in the ammonia steaming system in the embodiment of the present invention, and can be to generation Gaseous ammonia recycled and utilized, realize recycling;
3) special construction of the DTNF system in the embodiment of the present invention keeps its contamination resistance preferable, the company of can effectively improve The time of continuous stable operation;
4) present invention is not required to setting biochemical system, can be effectively saved because of supplementary carbon source increased expense, reduces operation Cost, and biochemical sludge is not generated, reduce the cost of sludge treatment.
Detailed description of the invention
The embodiment of the present invention is described in more detail in conjunction with the accompanying drawings, the above and other purposes of the present invention, Feature and advantage will be apparent.Attached drawing is used to provide to further understand the embodiment of the present invention, and constitutes explanation A part of book, is used to explain the present invention together with the embodiment of the present invention, is not construed as limiting the invention.In the accompanying drawings, Identical reference label typically represents same parts or step.
In attached drawing:
Fig. 1 shows the schematic block diagram of the processing system of the waste landfill site leachate in one embodiment of the invention;
Fig. 2 shows the schematic flows of the processing method of the waste landfill site leachate in one embodiment of the invention Figure.
Specific embodiment
In the following description, a large amount of concrete details are given so as to provide a more thorough understanding of the present invention.So And it is obvious to the skilled person that the present invention may not need one or more of these details and be able to Implement.In other examples, in order to avoid confusion with the present invention, for some technical characteristics well known in the art not into Row description.
It should be understood that the present invention can be implemented in different forms, and should not be construed as being limited to propose here Embodiment.On the contrary, provide these embodiments will make it is open thoroughly and completely, and will fully convey the scope of the invention to Those skilled in the art.
The purpose of term as used herein is only that description specific embodiment and not as limitation of the invention.Make herein Used time, " one " of singular, "one" and " described/should " be also intended to include plural form, unless the context clearly indicates separately Outer mode.It is also to be understood that term " composition " and/or " comprising ", when being used in this specification, determines the feature, whole The presence of number, step, operations, elements, and/or components, but be not excluded for one or more other features, integer, step, operation, The presence or addition of component, assembly unit and/or group.Herein in use, term "and/or" includes any of related listed item and institute There is combination.
In order to thoroughly understand the present invention, detailed description will be given below, to illustrate technical solution of the present invention.This The preferred embodiment of invention is described in detail as follows, however other than these detailed descriptions, the present invention can also have other implementations Mode.
To solve the above-mentioned problems, the present invention provides a kind of processing system of waste landfill site leachate, specifically includes that
Ammonia steaming system, the ammonia nitrogen in Leachate site for removing refuse landfill generation, to generate gaseous ammonia and fixed gas Body;
Dish tubular nanofiltration membrane system, for handling the Leachate site after the ammonia steaming system removal of ammonia and nitrogen, with drop First kind polluter in the low Leachate site generates first and produces water and the first concentrate;
Nanofiltration membrane system, it is dirty to reduce the second class in the first production water for handling the first production water It contaminates substance and generates the second production water and the second concentrate.
In conclusion the processing system of the waste landfill site leachate of the embodiment of the present invention includes ammonia steaming system, dish tubular type Nanofiltration membrane system (DTNF system) and nanofiltration membrane system (NF system) comprising following advantages:
1) ammonia steaming system occupied area is small, it is only necessary to based on equipment provide basis, can effectively save biochemistry The capital cost of system building;
2) ammonia nitrogen concentration in Leachate site can be effectively reduced in the ammonia steaming system in the embodiment of the present invention, and can be to generation Gaseous ammonia recycled and utilized, realize recycling;
3) special construction of the DTNF system in the embodiment of the present invention keeps its contamination resistance preferable, the company of can effectively improve The time of continuous stable operation;
4) present invention is not required to setting biochemical system, can be effectively saved because of supplementary carbon source increased expense, reduces operation Cost, and biochemical sludge is not generated, reduce the cost of sludge treatment.
In the following, being carried out in conjunction with processing system and method for the attached drawing to the waste landfill site leachate of the embodiment of the present invention detailed Explanation, wherein in the absence of conflict, the feature in following embodiment and embodiment can be combined with each other.
As an example, as shown in Figure 1, the embodiment of the present invention provides a kind of processing system 100 of waste landfill site leachate, Including refuse landfill 101, be used to fill solid waste etc., it is general filled using layering earthing by the way of to rubbish at Reason, covers one layer of loess after accumulating one layer of rubbish again, is easily reduced the pollution of rubbish in this way.
Leachate site can be generated in refuse landfill, the Leachate site is from rubbish due to pressure during stacking and landfill Physics, biology, the chemical actions such as real, fermentation, at the same generated under precipitation and the seepage effect of other external waters containing organic Or the liquid of inorganic constituents, it is directly discharged into environment if Leachate site is untreated, will cause serious environmental pollution.With protection ring For the purpose of border, it is essential for carrying out processing to Leachate site.
The Leachate site of refuse landfill causes environmental pollution in order to prevent, in one example, as shown in Figure 1, of the invention The processing system 100 for the waste landfill site leachate that embodiment provides further includes regulating system, is produced for adjusting refuse landfill The water quality and water of raw Leachate site, wherein regulating system may include Leachate site conditioning tank 102.
Waste landfill site leachate is collected through pipe network to well is collected, and later, the Leachate site well collected in well is pumped to for example The regulating system of Leachate site conditioning tank 102, the major function of regulating system are regulating water quality and water, with alleviate water it is excessive when Impact to follow-up system, in addition Leachate site passes through anaerobic digestion in Leachate site conditioning tank 102, and part carbonaceous organic material is dropped Solution is simple inorganic matter, its biodegradability can be improved.
Further, the processing system 100 of waste landfill site leachate further includes pretreatment system 103, for handling through institute The Leachate site after regulating system is adjusted is stated to retain the third pollutant matter in the Leachate site, wherein third class pollution Substance includes at least one of particulate matter (such as size be less than predetermined size tiny particles content), fiber and suspended matter, or Other polluters of person.Wherein it is possible to by the entrance of the outlet connection pretreatment system 103 of regulating system, such as pass through pipeline Connection, so that the Leachate site after the regulating system is adjusted be made to enter pretreatment system.
Optionally, pretreatment system 103 includes filter, and it is dirty to retain the third class in the Leachate site by the filter Substance is contaminated, the filter of bag filter or basket filter or any other suitable type may be selected in the type of filter.
In one example, it continues to refer to figure 1, the processing system 100 of waste landfill site leachate further includes ammonia steaming system 104, the ammonia nitrogen in Leachate site for removing refuse landfill generation, to generate gaseous ammonia and on-condensible gas.Optionally, the gas State ammonia includes ammonia.
Optionally, ammonia steaming system 104 is the apparatus system that can be effectively reduced ammonia nitrogen concentration in Landfill, can By the equipment such as ammonia still, preheater, heat exchanger, absorption tower, water pump, the affiliated facilities such as process pipe, instrument, valve composition.
In one example, the processing system 100 of waste landfill site leachate further includes steam replenishment system, is used for institute It states in ammonia steaming system 104 and supplements saturated vapor, enter ammonia steaming system by the Leachate site of pretreatment system, while constantly to steaming Saturated vapor is supplemented in ammonia system.Wherein steam replenishment system may include saturated vapor generating means, and saturated vapor generates dress It sets and is connected with ammonia steaming system 104, such as connected by pipeline, the saturated vapor generated constantly adds to ammonia still process by pipeline In system 104, to provide heat etc. for ammonia steaming system.
Continue to illustrate, the processing system 100 of waste landfill site leachate further includes ammonia absorption device 108, connects institute Ammonia steaming system 104 is stated, the gaseous ammonia such as ammonia for generating the ammonia steaming system 104 is converted into solid-state or liquid object Matter.Ammonia is collected and is utilized using ammonia absorption device 108, and ammonia absorption device 108 is can to convert gaseous ammonia to Solid-state or liquid and convenient for the equipment of storage and transport, the approach of resource utilization includes producing ammonium hydroxide and preparing bicarbonate Ammonium etc..By that gaseous ammonia such as ammonia can be recycled and be utilized with ammonia absorption device 108, recycling is realized.
Further, the processing system 100 of waste landfill site leachate further includes on-condensible gas processing system 107, for pair The on-condensible gas is handled, to prevent it from polluting atmosphere.
Using the ammonia nitrogen in ammonia steaming system removing Leachate site, and ammonia absorption device recycles ammonia nitrogen, and obtains phase The product of pass, so that the recycling of pollutant is realized, especially suitable for the longer Landfill processing of the landfill time limit.
In one example, the processing system 100 of waste landfill site leachate further includes dish tubular nanofiltration membrane system (DTNF System) 105, for handling the Leachate site (namely production water of ammonia steaming system) after the ammonia steaming system removal of ammonia and nitrogen, To reduce the first kind polluter in the Leachate site, generates first and produce water and the first concentrate, wherein the first kind is dirty Contaminating substance includes at least one of organic matter, coloration and divalent ion or the pollution that other DTNF systems 105 are capable of handling Substance.
Further, the dish tubular nanofiltration membrane system 105 is also used to the first of dish tubular nanofiltration membrane system generation Concentrated liquid recharge to the refuse landfill 101, the yield of the first concentrate is lower than traditional handicraft, and because of life not set in system Change system, influence of first Concentrated liquid recharge to refuse landfill 101 to system is lower, and system stability gets a promotion.It can be with Dish tubular nanofiltration membrane system 105 is connected into refuse landfill 101 for example, by attachment devices such as pipelines, enables the first concentrate Recharge is reached to refuse landfill 101.
The structure of DTNF system 105 can be any suitable structure, for example, DTNF system 105 can by nanofiltration diaphragm, The components such as flow guiding disc, center pull rod, shell, the various sealing elements of two end flanges and attachment bolt composition.Filtration membrane and water conservancy diversion Disk is stacked together, and is fixed with center pull rod and end cap flange, is then placed in pressure casing, just forms a dish tubular type Membrane module.
Further, the processing system 100 of waste landfill site leachate further includes nanofiltration membrane system (NF system) 106, is used for First production water of the dish tubular nanofiltration membrane system 105 is handled, to reduce the second class pollution in the first production water Substance generates second and produces water and the second concentrate, wherein the second pollutant matter includes organic matter or other pollutants Matter.The second Concentrated liquid recharge that the nanofiltration membrane system is also used to generate the nanofiltration membrane system is to the dish tubular nanofiltration membrane System 105, such as recharge, to the front end of dish tubular nanofiltration membrane system 105, which can refer to the entrance of DTNF, be entered by this Second concentrate of the production water of such as ammonia steaming system and NF system is poured into DTNF system by mouth.Wherein handled by nanofiltration membrane system The content of the polluter such as organic matter in the second production water generated afterwards further decreases, so as to reach discharge mark Standard avoids polluting the environment.
Nanofiltration membrane system 106 includes nanofiltration membrane, and the aperture of nanofiltration membrane is in 1nm or more, general 1-2nm.It is to allow solvent point A kind of functional semi-permeable membrane that sub or certain low molecular weight solutes or low price ion penetrate.It is a kind of special and before having very much The seperation film kind on way, it gains the name due to the size that can retain substance is about nanometer, and the molecular weight that it retains organic matter is about 150-500 or so retains the ability of dissolubility salt between 2-98%, is lower than high price to the desalination of monovalent anion salting liquid Anion salt solution, and for removing organic matter and coloration in the first production water, the hardness etc. of removing the first production water.
The effectively catching to organic matter, ammonia nitrogen in Leachate site can be achieved in the bi-membrane method (NF+RO) of traditional advanced treating, but It is the concentrate that can generate 25%-30%, the activated sludge of biochemical system will be caused not in Concentrated liquid recharge to landfill yard The influence of benefit.And add the group technology of NF film in the embodiment of the present invention using DTNF to the production water of ammonia steaming system, group technology system System concentrate generation rate is 15%-20%, and the yield of concentrate is lower than traditional handicraft, and because of department of biochemistry not set in system System, influence of the Concentrated liquid recharge to landfill yard to system is lower, and system stability gets a promotion.
It should be noted that in the present embodiment, between above-mentioned each system, between the outlet and entrance of system etc. Connection is attached by pipeline, be can according to need setting control valve, shut-off valve on pipeline, can be set in each device Liquidometer, pressure gauge etc. are set, pump equal power device can be set up according to needs such as the topographies of mounting platform.The present embodiment will no longer It is repeated.
In conclusion the processing system of the waste landfill site leachate of the embodiment of the present invention includes ammonia steaming system, dish tubular type Nanofiltration membrane system (DTNF system) and nanofiltration membrane system (NF system) comprising following advantages:
1) ammonia steaming system occupied area is small, it is only necessary to based on equipment provide basis, can effectively save biochemistry The capital cost of system building;
2) ammonia nitrogen concentration in Leachate site can be effectively reduced in the ammonia steaming system in the embodiment of the present invention, and can be to generation Gaseous ammonia recycled and utilized, realize recycling;
3) special construction of the DTNF system in the embodiment of the present invention keeps its contamination resistance preferable, the company of can effectively improve The time of continuous stable operation;
4) present invention is not required to setting biochemical system, can be effectively saved because of supplementary carbon source increased expense, reduces operation Cost, and biochemical sludge is not generated, reduce the cost of sludge treatment.
A kind of processing method of waste landfill site leachate is also provided in another embodiment of the present invention, is worth mentioning , the method for the embodiment of the present invention can realize based on the system in previous embodiment.
As shown in Fig. 2, the processing method of the waste landfill site leachate of the embodiment of the present invention mainly includes the following steps that S201 to step S203:
In step s 201, the ammonia nitrogen in Leachate site that removing refuse landfill generates, to generate gaseous ammonia and fixed gas Body.
In one example, before step S201, the processing method of the waste landfill site leachate of the embodiment of the present invention Further comprising the steps of S1 and step S2:
In step sl, the water quality and water of the Leachate site that refuse landfill generates are adjusted.
Specifically, waste landfill site leachate is collected through pipe network to well is collected, and later, the Leachate site well pump collected in well is sent To the regulating system of such as Leachate site conditioning tank 102, the major function of regulating system is regulating water quality and water, to alleviate water To the impact of follow-up system when excessive, in addition Leachate site passes through anaerobic digestion in Leachate site conditioning tank 102, and part is carbon containing organic Object is degraded to simple inorganic matter, its biodegradability can be improved.
In step s 2, the Leachate site after processing is adjusted is to retain the third pollutant matter in the Leachate site.Wherein, The third pollutant matter includes in particulate matter (such as size is less than tiny particles content of predetermined size), fiber and suspended matter At least one or other polluters.
In one example, in step s 201 further include: the ammonia nitrogen in the Leachate site that removing refuse landfill generates While, saturated vapor is supplemented, constantly to provide heat for removal of ammonia and nitrogen.
In one example, after step S201, the processing method of the waste landfill site leachate of the embodiment of the present invention Further include: solid-state or liquid are converted by the gaseous ammonia;And/or the on-condensible gas is handled, to prevent it Pollute atmosphere.Wherein, gaseous ammonia such as ammonia is collected and is utilized using ammonia absorption device, and ammonia absorption device is can Solid-state or liquid are converted convenient for the equipment of storage and transport by gaseous ammonia, and the approach of resource utilization includes preparing ammonia It water and prepares ammonium hydrogen carbonate etc., realizes recycling.
Continue as shown in Fig. 2, handling in step S202 the Leachate site after removal of ammonia and nitrogen, to reduce the infiltration The first kind polluter in liquid is dripped, first is generated and produces water and the first concentrate.Wherein, the first kind polluter includes The polluter that at least one of machine object, coloration and divalent ion or other DTNF systems are capable of handling.
Optionally, the processing method of the waste landfill site leachate of the embodiment of the present invention further includes by first concentrate The step of recharge to refuse landfill.
In step S203, the first production water is handled, to reduce the second class pollution in the first production water Substance generates second and produces water and the second concentrate.Wherein, the second pollutant matter include organic matter or NF system can Other polluters of processing.The method of the embodiment of the present invention further includes receiving second Concentrated liquid recharge to the dish tubular type The step of filter membrane system.
Add the group technology of NF film in the embodiment of the present invention using DTNF to the production water of ammonia steaming system, combined process system is dense Contracting liquid generation rate is 15%-20%, and the yield of concentrate is lower than traditional handicraft, and because of biochemical system not set in system, dense Influence of the contracting liquid recharge to landfill yard to system is lower, and system stability gets a promotion.
In conclusion the processing method of the waste landfill site leachate of the embodiment of the present invention, can be applied to place above-mentioned Reason system has the advantages that identical with aforementioned processing system.
The present invention has been explained by the above embodiments, but it is to be understood that, above-described embodiment is only intended to The purpose of citing and explanation, is not intended to limit the invention to the scope of the described embodiments.Those skilled in the art are also It is understood that the present invention is not limited to the above embodiments, introduction according to the present invention can also make more kinds of changes Type and modification, all fall within the scope of the claimed invention for these variants and modifications.Protection scope of the present invention is by attached Claims and its equivalent scope of category are defined.

Claims (12)

1. a kind of processing system of waste landfill site leachate, which is characterized in that the processing system includes:
Ammonia steaming system, the ammonia nitrogen in Leachate site for removing refuse landfill generation, to generate gaseous ammonia and on-condensible gas;
Dish tubular nanofiltration membrane system, for handling the Leachate site after the ammonia steaming system removal of ammonia and nitrogen, to reduce The first kind polluter in Leachate site is stated, first is generated and produces water and the first concentrate;
Nanofiltration membrane system, for handling the first production water, to reduce the second pollutant in the first production water Matter generates second and produces water and the second concentrate.
2. processing system as described in claim 1, which is characterized in that the dish tubular nanofiltration membrane system is also used to the dish The first Concentrated liquid recharge that tubular nanofiltration membrane system generates is to the refuse landfill.
3. processing system as described in claim 1, which is characterized in that the nanofiltration membrane system is also used to the nanofiltration membrane system The second Concentrated liquid recharge generated unite to the dish tubular nanofiltration membrane system.
4. processing system as described in claim 1, which is characterized in that the processing system further include:
Regulating system, the water quality and water of the Leachate site for adjusting refuse landfill generation;
Pretreatment system, for handling the Leachate site after regulating system adjusting to retain the third class in the Leachate site Polluter;
Steam replenishment system, for supplementing saturated vapor into the ammonia steaming system;
The ammonia steaming system is used to remove the ammonia nitrogen through in the pretreatment system treated Leachate site, with generate gaseous ammonia with On-condensible gas.
5. processing system as described in claim 1, which is characterized in that the processing system further include:
Ammonia absorption device, connects the ammonia steaming system, and the gaseous ammonia for generating the ammonia steaming system is converted into Solid-state or liquid;And/or
On-condensible gas processing system, for handling the on-condensible gas.
6. processing system as claimed in claim 4, which is characterized in that the first kind polluter includes organic matter, coloration At least one of with divalent ion;And/or
The second pollutant matter includes organic matter;And/or
The third pollutant matter includes at least one of particulate matter, fiber and suspended matter.
7. a kind of processing method of waste landfill site leachate, which is characterized in that the treating method comprises:
The ammonia nitrogen in the Leachate site that refuse landfill generates is removed, to generate gaseous ammonia and on-condensible gas;
Leachate site after removal of ammonia and nitrogen is handled, to reduce the first kind polluter in the Leachate site, generates first Produce water and the first concentrate;
To it is described first production water handle, with reduce it is described first produce water in the second pollutant matter generate second produce water and Second concentrate.
8. processing method as claimed in claim 7, which is characterized in that the processing method further include:
By first Concentrated liquid recharge to the refuse landfill.
9. processing method as claimed in claim 7, which is characterized in that the processing method is applied to waste landfill site leachate Processing system, the processing system includes dish tubular nanofiltration membrane system, and the processing method is further comprising the steps of:
By second Concentrated liquid recharge to the dish tubular nanofiltration membrane system.
10. processing method as claimed in claim 7, which is characterized in that in the Leachate site that the removing refuse landfill generates In ammonia nitrogen, the step of to generate gaseous ammonia and on-condensible gas before, the processing method is further comprising the steps of:
Adjust the water quality and water of the Leachate site that refuse landfill generates;
Leachate site after processing adjusting is to retain the third pollutant matter in the Leachate site.
11. processing method as claimed in claim 7, which is characterized in that the processing method is further comprising the steps of:
Solid-state or liquid are converted by the gaseous ammonia;And/or
The on-condensible gas is handled.
12. processing method as claimed in claim 10, which is characterized in that the first kind polluter includes organic matter, color At least one of degree and divalent ion;And/or
The second pollutant matter includes organic matter;And/or
The third pollutant matter includes at least one of particulate matter, fiber and suspended matter.
CN201910492946.7A 2019-06-06 2019-06-06 A kind of processing method and system of waste landfill site leachate Pending CN110330157A (en)

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