CN220098736U - Heterotrophic and autotrophic synergistic integrated denitrification device - Google Patents
Heterotrophic and autotrophic synergistic integrated denitrification device Download PDFInfo
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- CN220098736U CN220098736U CN202223537179.3U CN202223537179U CN220098736U CN 220098736 U CN220098736 U CN 220098736U CN 202223537179 U CN202223537179 U CN 202223537179U CN 220098736 U CN220098736 U CN 220098736U
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- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 27
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- 238000010992 reflux Methods 0.000 claims abstract description 17
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- 239000006004 Quartz sand Substances 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 238000000034 method Methods 0.000 abstract description 18
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- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 10
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- 239000011028 pyrite Substances 0.000 description 7
- 229910052683 pyrite Inorganic materials 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
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- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 6
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- 239000010865 sewage Substances 0.000 description 6
- 229910052717 sulfur Inorganic materials 0.000 description 5
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 4
- 239000000463 material Substances 0.000 description 4
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- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 2
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- 239000003513 alkali Substances 0.000 description 2
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- 239000001913 cellulose Substances 0.000 description 2
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- 239000008103 glucose Substances 0.000 description 2
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- 229910052757 nitrogen Inorganic materials 0.000 description 2
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- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
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- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 1
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- KAEAMHPPLLJBKF-UHFFFAOYSA-N iron(3+) sulfide Chemical compound [S-2].[S-2].[S-2].[Fe+3].[Fe+3] KAEAMHPPLLJBKF-UHFFFAOYSA-N 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The utility model provides a heterotrophic and autotrophic synergistic integrated denitrification device. The device comprises a body, a water outlet well (2), a water inlet pipe (11), a diversion trench (12), a bottom water pipe (13), a first slotted pipeline (14), a reflux device (15), a lifting pipe (16), a water distribution pipe (17) and a second slotted pipeline (18); wherein the body comprises an anoxic zone (1) and an oxygen-enriched zone (3), and the oxygen-enriched zone (3) is positioned at the upper part of the anoxic zone (1); the anoxic zone (1) is provided with a nitrifying layer (21); the oxygen-enriched area (3) is provided with a gravel-shell composite layer (22); the bottom of the water outlet well (2) is provided with the reflux device (15), and the reflux device (15) is connected with the water distribution pipe (17) through the lifting pipe (16). The device can reduce the output of sludge in the denitrification process and the output of sulfate radical in the autotrophic denitrification process.
Description
Technical Field
The utility model belongs to the technical field of sewage treatment, and particularly relates to a heterotrophic and autotrophic cooperative integrated denitrification device.
Background
Nitrate pollution in water environment has become a pollution problem, and the environment with high nitrate pollution has serious consequences: the excess nitrogen compounds in surface water accelerate algae growth during eutrophication, which depletes oxygen in lakes and rivers and directly or indirectly has adverse health consequences.
Methods for removing nitrate from water mainly include physical, chemical and biological methods, such as adsorption, ion exchange, reverse osmosis, AAO, SBR, etc. Biological denitrification is a more cost effective method than physical and chemical denitrification. At present, biological denitrification is widely applied to the treatment of urban, industrial and agricultural wastewater and nitrate-polluted groundwater. In the biological denitrification process, nitrate nitrogen is used as an electron acceptor and is converted into harmless nitrogen through the action of microorganisms. Denitrifying bacteria require an electron donor to provide electrons and energy, so the choice of electron donor has important implications for the denitrification process.
Denitrification can be classified into heterotrophic denitrification and autotrophic denitrification according to the type of electron donor. Heterotrophic denitrification is performed by using organic compounds including low molecular weight organic substances (such as acetic acid, methanol, glucose, benzene, methane, etc.) and high molecular weight organic substances (such as cellulose, polylactic acid, polycaprolactone, etc.) as electron donors; autotrophic denitrification uses inorganic compounds including hydrogen, reduced sulfur compounds (e.g., sulfides, elemental sulfur, and thiosulfates), ferrous iron sulfide, ferric sulfide, arsenite, and manganese as electron donors; in general, heterotrophic denitrification has a higher nitrate removal rate than autotrophic denitrification due to a faster growth rate of heterotrophic bacteria. However, the added carbon source is costly and increases the risk of secondary pollution. In addition, the surplus sludge produced by heterotrophic denitrification also requires proper subsequent treatment. Autotrophic denitrification is therefore considered an alternative process, with the advantage of reducing the risk of organic pollution and of reducing the sludge yield.
Many bodies of water have insufficient organic carbon to provide a sufficient electron donor for complete denitrification. Therefore, in the low-carbon water treatment process, an additional organic matter is required to be added, so that a sufficient carbon source is provided for completing the denitrification process. Common liquid carbon sources are methanol, sodium acetate, glucose, sucrose, and the like. The liquid carbon source is added, so that the cost is high, and the addition quantity is insufficient or excessive under the condition of fluctuation of the water quality of the inlet water, so that the water quality of the outlet water is influenced.
The autotrophic denitrification process is to use inorganic matters as electron donors for nitrate reduction, thereby completing the denitrification process. Sulfur autotrophic denitrification is more common. Although the sulfur autotrophic denitrification technology has the advantages of small mud yield, no need of adding an organic matrix and the like, the denitrification rate is low, inorganic matters (such as sulfate) generated by the technology are not easy to be utilized by microorganisms, and the inorganic matters can change the organoleptic properties of the drinking water. And absolute autotrophic technology does not exist, and endogenous organic carbon such as soluble products and cell lysis products of microorganisms are unavoidable.
Disclosure of Invention
Aiming at the problems of increasingly serious nitrate pollution, high cost and more byproducts in the processes of heterotrophic denitrification and sulfur autotrophic denitrification at present, the utility model aims to provide a heterotrophic and autotrophic synergistic integrated denitrification device, and the device can reduce the yield of sludge in the denitrification process and the yield of sulfate radical in the autotrophic denitrification process.
In order to achieve the aim, the utility model provides a heterotrophic and autotrophic cooperative integrated denitrification device, wherein the heterotrophic and autotrophic cooperative integrated denitrification device comprises a body, a water outlet well, a water inlet pipe, a diversion trench, a bottom water pipe, a first slotted pipeline, a reflux device, a lifting pipe, a water distribution pipe and a second slotted pipeline;
the body comprises an anoxic zone and an oxygen-enriched zone, and the oxygen-enriched zone is positioned at the upper part of the anoxic zone; the anoxic zone is provided with a nitrifying layer; the oxygen-enriched area is provided with a gravel-shell composite layer;
the water inlet pipe is connected with the inlet of the diversion trench, the outlet of the diversion trench is connected with the bottom water pipe, the bottom water pipe is arranged at the bottom of the anoxic zone, and a plurality of openings are arranged on the pipe wall;
the first slotted pipeline is arranged at the middle upper part of the anoxic zone, and a plurality of openings are arranged on the pipe wall; one end of the first slotted pipeline extends to the inside of the water outlet well;
the bottom of the water outlet well is provided with the reflux device, and the reflux device is connected with the water distribution pipe through the lifting pipe;
the water distribution pipe is positioned at the top of the oxygen enrichment area, and a plurality of openings are formed in the pipe wall;
the bottom of the oxygen enrichment area is provided with the second slotted pipeline, and the pipe wall of the second slotted pipeline is provided with a plurality of openings;
one end of the second slotted pipeline is connected with the water inlet pipe.
According to a specific embodiment of the present utility model, preferably, the end of the water inlet pipe is divided into a connection pipe connected to the diversion trench and a blow-down pipe extending to the outside of the body.
According to a specific embodiment of the present utility model, preferably, one end of the second slotted pipe is connected to the connection pipe.
According to a specific embodiment of the present utility model, preferably, an outlet is provided on a side wall of the water outlet well.
According to a specific embodiment of the present utility model, preferably, an end of the water distribution pipe, which is not connected to the riser, extends to the outside of the body.
According to a specific embodiment of the present utility model, preferably, the nitrifying layer is made of pyrite rice hull combined materials. The pyrite rice hull combined material is a mixture of pyrite and rice hulls.
According to a specific embodiment of the present utility model, preferably, the gravel-shell composite layer is a gravel-shell composite material. The gravel-shell combination material is a mixture of gravel and shells.
According to a specific embodiment of the present utility model, preferably, the oxygen enrichment zone further comprises a quartz sand layer located at the bottom of the gravel-shell composite layer, and the second slotted pipe is located inside the quartz sand layer.
According to a specific embodiment of the present utility model, preferably, the oxygen-enriched zone further comprises a gravel layer located on top of the gravel-shell composite layer, and the water distribution pipe is located inside the gravel layer.
According to a specific embodiment of the utility model, preferably, the reflux device (15) is provided with a lift pump.
The denitrification device provided by the utility model is integrated nitrate removal equipment with low cost, low adverse effect and no limitation to use occasions, realizes heterotrophic and sulfur autotrophic combined denitrification (collaborative denitrification), is suitable for the treatment of non-point source nitrate polluted water, and has the following beneficial effects:
(1) Acid and alkali complementation is realized by acid generated by sulfur autotrophic denitrification and alkali generated by heterotrophic denitrification;
(2) The yield of sludge in the denitrification process can be reduced;
(3) Can reduce the yield of sulfate radical in the autotrophic denitrification process.
Drawings
FIG. 1 is a schematic diagram of a heterotrophic and autotrophic co-operation integrated denitrification device.
The main reference numerals illustrate:
an anaerobic zone 1, a water outlet well 2 and an oxygen enrichment zone 3;
a water inlet pipe 11, a connecting pipe 111, a blow-down pipe 112, a diversion trench 12, a bottom water pipe 13, a first slotted pipeline 14, a reflux device 15, a lifting pipe 16, a water distribution pipe 17 and a second slotted pipeline 18;
a nitrifying layer 21, a gravel-shell composite layer 22, a quartz sand layer 23 and a gravel layer 24.
Detailed Description
The technical solution of the present utility model will be described in detail below for a clearer understanding of technical features, objects and advantageous effects of the present utility model, but should not be construed as limiting the scope of the present utility model.
Example 1
The embodiment provides a heterotrophic and autotrophic synergistic integrated denitrification device, and the structure of the device is shown in figure 1.
The heterotrophic and autotrophic synergistic integrated denitrification device comprises a body, a water outlet well 2, a water inlet pipe 11, a diversion trench 12, a bottom water pipe 13, a first slotted pipeline 14, a reflux device 15, a lifting pipe 16, a water distribution pipe 17 and a second slotted pipeline 18;
wherein the body comprises an anoxic zone 1 and an oxygen-enriched zone 3, and the oxygen-enriched zone 3 is positioned at the upper part of the anoxic zone 1;
the anoxic zone 1 is provided with a nitrifying layer 21, and the nitrifying layer 21 is made of pyrite rice hull combined materials;
the oxygen enrichment area 3 is provided with a gravel-shell composite layer 22, a quartz sand layer 23 positioned at the bottom of the gravel-shell composite layer 22 and a gravel layer 24 positioned at the top of the gravel-shell composite layer 22, the gravel-shell composite layer 22 is made of a gravel-shell composite material, the quartz sand layer 23 is filled with quartz sand, the second slotted pipeline 18 is positioned in the quartz sand layer 23, and the water distribution pipe 17 is positioned in the gravel layer 24;
the tail end of the water inlet pipe 11 is divided into a connecting pipe 111 and an emptying pipe 112, the connecting pipe 111 is connected with the diversion trench 12, and the emptying pipe 112 extends to the outside of the body;
the outlet of the diversion trench 12 is connected with the bottom water pipe 13, the bottom water pipe 13 is arranged at the bottom of the anoxic zone 1, and a plurality of openings are arranged on the pipe wall;
the first slotted pipeline 14 is arranged at the middle upper part of the anoxic zone 1, and a plurality of openings are arranged on the pipe wall; one end of the first slotted pipe 14 extends into the water outlet well 2;
the bottom of the water outlet well 2 is provided with the reflux device 15, the side wall is provided with an outlet, the reflux device 15 is provided with a lift pump, and the reflux device is connected with the water distribution pipe 17 through the lift pipe 16;
the water distribution pipe 17 is positioned at the top of the oxygen enrichment zone 3, and a plurality of openings are arranged on the pipe wall; one end of the water distribution pipe 17, which is not connected with the lifting pipe 16, extends to the outside of the body;
the bottom of the oxygen enrichment area 3 is provided with the second slotted pipeline 18, and the pipe wall of the second slotted pipeline 18 is provided with a plurality of openings;
one end of the second slotted pipe 18 is connected to the connection pipe 111 of the water inlet pipe 11.
When the heterotrophic and autotrophic synergistic integrated denitrification device is adopted for water treatment, the water treatment is carried out according to the following modes:
the nitrate-containing sewage enters through the water inlet pipe 11 and enters the diversion trench 12 through the connecting pipe 111 for mixing, then enters the bottom water pipe 13 at the bottom of the anoxic zone 1, enters the nitrifying layer 21 in the anoxic zone 1 through the opening hole for contacting with pyrite and rice hulls, feS in the pyrite 2 Cellulose in the rice hulls provides electrons for denitrifying bacteria to perform denitrification, nitrate is converted into nitrogen, sewage flows upwards into the first slotted pipeline 14 and then enters the water outlet well 2;
when the water level in the water outlet well 2 rises to a certain height, the pump in the reflux device 15 is started to lift the sewage to the water distribution pipe 17 through the lifting pipe 16, the sewage is uniformly distributed to the middle gravel-shell composite layer 22 after being distributed through the water distribution pipe 17 and the gravel layer 24, the shells in the area of the gravel-shell composite layer 22 contain a large amount of calcium carbonate, the alkalinity source required by the growth of nitrifying bacteria in the oxygen-enriched area 3 can be provided, and meanwhile, the shells (such as oyster shells) can also relieve the pollution of pyrite (FeS) in the anoxic area 1 2 ) The pH is lowered due to denitrification;
the effluent of the oxygen-enriched area 3 enters a connecting pipe 111 through a second slotted pipeline 18, finally enters a diversion trench 12 to be mixed with the incoming water, and then continuously enters the oxygen-enriched area 1 for treatment.
The device is adopted to treat sewage, so that the yield of sludge in the denitrification process and the yield of sulfate radical in the autotrophic denitrification process can be reduced.
Claims (8)
1. The heterotrophic and autotrophic cooperative integrated denitrification device is characterized by comprising a body, a water outlet well (2), a water inlet pipe (11), a diversion trench (12), a bottom water pipe (13), a first slotted pipeline (14), a reflux device (15), a lifting pipe (16), a water distribution pipe (17) and a second slotted pipeline (18);
wherein the body comprises an anoxic zone (1) and an oxygen-enriched zone (3), and the oxygen-enriched zone (3) is positioned at the upper part of the anoxic zone (1); the anoxic zone (1) is provided with a nitrifying layer (21); the oxygen-enriched area (3) is provided with a gravel-shell composite layer (22);
the water inlet pipe (11) is connected with the inlet of the diversion trench (12), the outlet of the diversion trench (12) is connected with the bottom water pipe (13), the bottom water pipe (13) is arranged at the bottom of the anoxic zone (1), and a plurality of openings are arranged on the pipe wall;
the first slotted pipeline (14) is arranged at the middle upper part of the anoxic zone (1), and a plurality of openings are arranged on the pipe wall; one end of the first slotted pipeline (14) extends to the inside of the water outlet well (2);
the bottom of the water outlet well (2) is provided with the reflux device (15), and the reflux device (15) is connected with the water distribution pipe (17) through the lifting pipe (16);
the water distribution pipe (17) is positioned at the top of the oxygen enrichment area (3) and a plurality of openings are arranged on the pipe wall;
the bottom of the oxygen enrichment area (3) is provided with the second slotted pipeline (18), and the pipe wall of the second slotted pipeline (18) is provided with a plurality of openings;
one end of the second slotted pipeline (18) is connected with the water inlet pipe (11).
2. The heterotrophic and autotrophic co-integrated denitrification device according to claim 1, wherein the tail end of the water inlet pipe (11) is divided into a connecting pipe (111) and a blow-down pipe (112), the connecting pipe (111) is connected with the diversion trench (12), and the blow-down pipe (112) extends to the outside of the body.
3. The heterotrophic and autotrophic co-integrated denitrification device according to claim 2, wherein one end of the second slotted pipe (18) is connected with the connecting pipe (111).
4. The heterotrophic and autotrophic co-operation integrated denitrification device according to claim 1, wherein an outlet is provided on the sidewall of the water outlet well (2).
5. The heterotrophic and autotrophic co-integrated denitrification device according to claim 1, wherein the end of the water distribution pipe (17) not connected with the riser pipe (16) extends to the outside of the body.
6. The heterotrophic and autotrophic co-integrated denitrification device according to claim 1, wherein the oxygen-enriched zone (3) further comprises a quartz sand layer (23) at the bottom of the gravel-shell composite layer (22), and the second slotted pipeline (18) is located inside the quartz sand layer (23).
7. The heterotrophic and autotrophic co-integrated denitrification device according to claim 1, wherein the oxygen-enriched zone (3) further comprises a gravel layer (24) positioned on top of the gravel-shell composite layer (22), and the water distribution pipe (17) is positioned inside the gravel layer (24).
8. Heterotrophic and autotrophic co-integrated denitrification device according to claim 1, wherein the reflux device (15) is provided with a lift pump.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223537179.3U CN220098736U (en) | 2022-12-29 | 2022-12-29 | Heterotrophic and autotrophic synergistic integrated denitrification device |
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| CN202223537179.3U CN220098736U (en) | 2022-12-29 | 2022-12-29 | Heterotrophic and autotrophic synergistic integrated denitrification device |
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| Publication Number | Publication Date |
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| CN220098736U true CN220098736U (en) | 2023-11-28 |
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| CN202223537179.3U Active CN220098736U (en) | 2022-12-29 | 2022-12-29 | Heterotrophic and autotrophic synergistic integrated denitrification device |
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