CN220976751U - Landfill leachate treatment device - Google Patents
Landfill leachate treatment device Download PDFInfo
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- CN220976751U CN220976751U CN202322579513.XU CN202322579513U CN220976751U CN 220976751 U CN220976751 U CN 220976751U CN 202322579513 U CN202322579513 U CN 202322579513U CN 220976751 U CN220976751 U CN 220976751U
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- landfill leachate
- deamination
- treatment
- anaerobic
- reverse osmosis
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- 239000000149 chemical water pollutant Substances 0.000 title claims abstract description 36
- 230000009615 deamination Effects 0.000 claims abstract description 30
- 238000006481 deamination reaction Methods 0.000 claims abstract description 30
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 28
- 239000012528 membrane Substances 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 15
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims abstract description 5
- 239000012141 concentrate Substances 0.000 claims abstract description 4
- 238000010521 absorption reaction Methods 0.000 claims description 19
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 12
- 238000004062 sedimentation Methods 0.000 claims description 5
- 150000003839 salts Chemical class 0.000 claims description 4
- 238000009280 upflow anaerobic sludge blanket technology Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 16
- 230000008569 process Effects 0.000 description 15
- 239000002351 wastewater Substances 0.000 description 9
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 235000011941 Tilia x europaea Nutrition 0.000 description 4
- 235000011114 ammonium hydroxide Nutrition 0.000 description 4
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 4
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 4
- 235000011130 ammonium sulphate Nutrition 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 4
- 239000004571 lime Substances 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- PUKLDDOGISCFCP-JSQCKWNTSA-N 21-Deoxycortisone Chemical compound C1CC2=CC(=O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@@](C(=O)C)(O)[C@@]1(C)CC2=O PUKLDDOGISCFCP-JSQCKWNTSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- FCYKAQOGGFGCMD-UHFFFAOYSA-N Fulvic acid Natural products O1C2=CC(O)=C(O)C(C(O)=O)=C2C(=O)C2=C1CC(C)(O)OC2 FCYKAQOGGFGCMD-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 229940095100 fulvic acid Drugs 0.000 description 2
- 239000002509 fulvic acid Substances 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model provides a landfill leachate treatment device, which comprises the following systems connected in sequence: the anaerobic system is used for carrying out anaerobic treatment on the landfill leachate to remove organic matters; the pretreatment system is used for removing carbonate in the landfill leachate treated by the anaerobic system, and reducing hardness and alkalinity; the deamination system is used for removing ammonia nitrogen in the landfill leachate treated by the pretreatment system; reverse osmosis systems for obtaining concentrate and produced water. Compared with other landfill leachate treatment devices in the prior art, the landfill leachate treatment device provided by the utility model has the advantages that the treatment cost of the landfill leachate can be obviously reduced by adopting the combination of anaerobic treatment, pretreatment, deamination and RO (reverse osmosis) membrane to treat the landfill leachate.
Description
Technical Field
The utility model relates to the technical field of wastewater treatment, in particular to a garbage leachate treatment device.
Background
The treatment of landfill leachate is a recognized problem in the water treatment industry, because the landfill leachate contains a large amount of organic pollutants and also contains various heavy metal pollutants, once the landfill leachate is improperly treated, the quality of surface water is directly affected, and the safety of underground water is endangered.
At present, the leachate treatment technology in China comprises land treatment, physical and chemical treatment, biological treatment and the like. Among them, land treatment cannot be used alone, and has been rarely applied in recent years due to the problem of difficulty in treatment and the problem of occupation of land. The physical and chemical treatment is generally used as pretreatment and advanced treatment in the treatment of garbage leachate; biological treatment can economically and effectively remove organic pollutants, but the biological treatment alone generally cannot reach the standard, needs to be organically combined with other processes, and has increasingly significant technical importance along with the continuous improvement of national requirements on emission standards.
Anaerobic + biochemical (a/O) +mbr + NF + RO processes are commonly used in the prior art, and the means for implementing such processes may be referred to the process equipment disclosed in CN 206127080U. However, sometimes the C/N ratio of the anaerobic landfill leachate is below 1, a large amount of carbon sources need to be supplemented in an A/O system, the economy is poor, and the energy consumption in deamination is high. For the landfill leachate with low C/N ratio and high ammonia nitrogen, the carbon source is seriously insufficient, the nutrition proportion is seriously unbalanced, the inhibition effect on biological treatment is larger, and the biological treatment is not suitable to be directly carried out. Therefore, the problems of the adoption of the process are that the treatment process is complex, the energy consumption and the medicine consumption of the biochemical section are large, and the recovery rate of the system is low.
Disclosure of utility model
The applicant develops a process for treating landfill leachate by adopting the combination of anaerobic treatment, pretreatment, deamination and RO (reverse osmosis) membrane, the process can reduce the high-concentration hardness in the wastewater by utilizing a large amount of alkalinity and lime contained in anaerobic effluent, the hardness of the effluent can be reduced below the detection limit (0.1 mg/L), the subsequent membrane feeding and acid adding process (pollution blocking prevention) of the conventional process can be omitted, and the treatment cost is further reduced. The utility model aims to provide a landfill leachate treatment device for implementing the process.
Correspondingly, the garbage leachate treatment device comprises the following systems which are connected in sequence:
The anaerobic system is used for carrying out anaerobic treatment on the landfill leachate to remove organic matters;
the pretreatment system is used for removing carbonate in the landfill leachate treated by the anaerobic system and reducing the hardness and alkalinity of the leachate;
the deamination system is used for removing ammonia nitrogen in the landfill leachate treated by the pretreatment system;
reverse osmosis systems for obtaining concentrate and produced water, wherein the concentrate contains a substantial amount of impurities.
The garbage leachate treatment process preferably comprises the steps of deamination by a physical-chemical method to greatly reduce ammonia nitrogen concentration, and then ammonia gas absorption to form ammonia water or an ammonium sulfate product for recycling. Based on this, preferably, the above treatment device further comprises an absorption system, the feed inlet of which is connected to one of the discharge outlets of the deamination system, for absorbing the ammonia gas generated by the deamination system. In this embodiment, one outlet of the deamination system is connected to the absorption system and the other outlet is connected to the reverse osmosis system.
Preferably, the absorption system is a packed absorption tower, and the material of the packing is at least one selected from metal, ceramic and plastic.
Preferably, the treatment device further comprises an incinerator, wherein a feed inlet of the incinerator is connected with a discharge outlet of the reverse osmosis system and is used for incinerating the concentrated water to obtain the mixed salt.
Preferably, the deamination system is a vapor deamination system or an ammonia nitrogen stripping system.
Preferably, the vapor deamination system is a vapor deamination column.
Preferably, the ammonia nitrogen stripping system comprises at least two stages of degassing towers.
Preferably, the reverse osmosis system comprises at least two stages of reverse osmosis membranes, the reverse osmosis membranes being selected from at least one of DTRO membranes and roll-to-roll membranes.
Preferably, the anaerobic system employs a UASB reactor.
Preferably, the pretreatment system employs a high density sedimentation tank.
Drawings
FIG. 1 is a schematic diagram showing the connection of a landfill leachate treatment apparatus according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram showing the connection of a landfill leachate treatment apparatus according to another embodiment of the present utility model;
Fig. 3 is a schematic diagram showing connection of a landfill leachate treatment device according to still another embodiment of the present utility model.
Reference numerals:
1. anaerobic system, pretreatment system, deamination system, reverse osmosis system, absorption system, and incinerator.
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present invention with specific examples. While the description of the invention will be described in connection with the preferred embodiments, it is not intended to limit the inventive features to the implementation. Rather, the purpose of the invention described in connection with the embodiments is to cover other alternatives or modifications, which may be extended by the claims based on the invention. The following description contains many specific details for the purpose of providing a thorough understanding of the present invention. The invention may be practiced without these specific details. Furthermore, some specific details are omitted from the description in order to avoid obscuring the invention. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
It should be noted that in this specification, like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present embodiment, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present embodiment can be understood in a specific case by those of ordinary skill in the art.
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Referring to FIG. 1, when the landfill leachate treatment device according to an embodiment of the present utility model is used for landfill leachate treatment, the landfill leachate firstly enters an anaerobic system 1, and in this embodiment, the anaerobic system adopts a UASB reactor to reduce COD of the landfill leachate to less than 3000 mg/L.
The COD in the wastewater is reduced after anaerobic treatment of the landfill leachate, but the ammonia nitrogen concentration is not reduced, and the anaerobic effluent alkalinity of the landfill leachate is very high, so that the alkalinity and hardness in the leachate are reduced simultaneously by adopting a lime softening pretreatment mode after anaerobism, and a large amount of fulvic acid in the landfill leachate can be precipitated under an alkaline condition, so that the COD concentration of the wastewater after alkaline pretreatment can be further reduced.
In the embodiment, the anaerobic treated landfill leachate enters a pretreatment system 2, and in the embodiment, the pretreatment system 2 adopts a high-density sedimentation tank, and the alkaline and sedimentation effect of lime are utilized in the high-density sedimentation tank to form and remove the fulvic acid and carbonate in the leachate, so that the carbonate in the leachate is reduced to below 2000 mg/L. After the alkalinity and hardness of the wastewater are reduced by the lime softening process, the acid addition amount is reduced, so that the TDS content of the wastewater is indirectly reduced, and the overall recovery rate of the wastewater is increased.
In the embodiment, pretreated percolate enters a deamination system 3, the deamination system 3 adopts an ammonia nitrogen stripping system, the stripping system comprises a two-stage deamination tower, the ammonia nitrogen concentration in the percolate after stripping is reduced to below 50mg/L, meanwhile, COD in the percolate can be further removed by stripping, and the COD after stripping is reduced to below 1500 mg/L. Of course, in other embodiments of the utility model, the deamination system may also employ a steam deamination column.
The percolate after deamination enters a reverse osmosis system 4, and in the embodiment, the reverse osmosis system 4 is a disc-tube reverse osmosis membrane (DTRO membrane), and the produced water and the concentrated water are obtained through the reverse osmosis membrane, so that the produced water can be recycled to other production links. Of course, the reverse osmosis membrane may be a roll reverse osmosis membrane in other embodiments of the utility model.
Under the strong alkaline condition, ammonia nitrogen in the softened high ammonia nitrogen wastewater can escape from the water in the form of ammonia gas, and the escaped ammonia gas can form ammonia water or an ammonium sulfate product after being absorbed by water or sulfuric acid. According to another embodiment of the utility model, an absorption system is added to the treatment device of the previous embodiment. Referring to fig. 2, the inlet of the absorption system 5 is connected to a discharge port of the deamination system 3 for absorbing the ammonia gas blown out. In this embodiment, the absorption system 5 employs a packed absorption tower, the material of the packing is ceramic, and the nominal diameter of the ceramic packing is 50mm. Of course, in other embodiments of the present utility model, stainless steel, plastic, or other materials may be used for the ceramic filler, and the nominal diameter of the filler may be 28mm, 35mm, or the like. In the absorption system 5 of this embodiment, ammonia absorption is performed using sulfuric acid, and ammonium sulfate is produced. Of course, in other embodiments of the present utility model, water may be used in the absorption system 5 for ammonia absorption to produce ammonia water.
The garbage leachate is subjected to an anaerobic system 1 to remove most of organic matters, a pretreatment system 2 is further used for removing the organic matters, reducing the alkalinity and the hardness, a deamination system 3 is used for removing ammonia nitrogen, and ammonia is absorbed in an absorption system 5 to prepare ammonia water or an ammonium sulfate product. After the main pollutants in the wastewater are removed by the process units, the high-pressure reverse osmosis membrane is used for carrying out high-power concentration on the wastewater, the produced water is recycled, and a small amount of concentrated water can be returned to the incinerator for incineration or slag flushing. Thus, according to a further embodiment of the utility model, an incinerator is added to the treatment device of the previous embodiment.
Referring to fig. 3, a feed inlet of the incinerator 6 is connected with a discharge outlet of the reverse osmosis system 4, and is used for incinerating reverse osmosis concentrated water to obtain mixed salt. The mixed salt produced by the landfill leachate treatment system is usually treated outside.
In summary, the utility model provides a device for implementing a process of combining anaerobic + pretreatment + deamination + RO membrane to treat landfill leachate. Compared with the device for implementing anaerobic+biochemical (A/O) +MBR+NF+RO technology in the prior art, the device for treating garbage leachate can obviously save treatment flow and reduce treatment cost.
While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a further detailed description of the invention with reference to specific embodiments, and it is not intended to limit the practice of the invention to those descriptions. Various changes in form and detail may be made therein by those skilled in the art, including a few simple inferences or alternatives, without departing from the spirit and scope of the present invention.
Claims (10)
1. The garbage leachate treatment device is characterized by comprising the following systems connected in sequence:
The anaerobic system is used for carrying out anaerobic treatment on the landfill leachate to remove organic matters;
The pretreatment system is used for removing carbonate in the landfill leachate treated by the anaerobic system and reducing the alkalinity and hardness of the leachate;
the deamination system is used for removing ammonia nitrogen in the landfill leachate treated by the pretreatment system;
reverse osmosis systems for obtaining concentrate and produced water.
2. The treatment device of claim 1, further comprising an absorption system, wherein the feed inlet of the absorption system is connected to a discharge outlet of the deamination system for absorbing ammonia gas generated by the deamination system.
3. The treatment apparatus of claim 2, wherein the absorption system is a packed absorption column.
4. The treatment device according to claim 1, further comprising an incinerator, wherein a feed inlet of the incinerator is connected to a discharge outlet of the reverse osmosis system, and is configured to incinerate the concentrated water to obtain a salt.
5. The treatment apparatus of claim 1, wherein the deamination system is a vapor deamination system or an ammonia nitrogen stripping system.
6. The treatment apparatus of claim 5, wherein the vapor deamination system is a vapor deamination column.
7. The treatment apparatus according to claim 5, wherein the ammonia nitrogen stripping system comprises at least two stages of deaerators.
8. The treatment apparatus of claim 1, wherein the reverse osmosis system comprises at least two stages of reverse osmosis membranes selected from at least one of a DTRO membrane and a roll-to-roll membrane.
9. The treatment apparatus of claim 1, wherein the anaerobic system employs a UASB reactor.
10. The treatment apparatus of claim 1, wherein the pretreatment system employs a high density sedimentation tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322579513.XU CN220976751U (en) | 2023-09-21 | 2023-09-21 | Landfill leachate treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322579513.XU CN220976751U (en) | 2023-09-21 | 2023-09-21 | Landfill leachate treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220976751U true CN220976751U (en) | 2024-05-17 |
Family
ID=91056035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322579513.XU Active CN220976751U (en) | 2023-09-21 | 2023-09-21 | Landfill leachate treatment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220976751U (en) |
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2023
- 2023-09-21 CN CN202322579513.XU patent/CN220976751U/en active Active
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