CN114044570A - Denitrification device and method for denitrifying wastewater with low carbon-nitrogen ratio - Google Patents
Denitrification device and method for denitrifying wastewater with low carbon-nitrogen ratio Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 16
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- 238000011010 flushing procedure Methods 0.000 claims abstract description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 40
- 229910052717 sulfur Inorganic materials 0.000 claims description 40
- 239000011593 sulfur Substances 0.000 claims description 40
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 18
- 239000010802 sludge Substances 0.000 claims description 18
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 9
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 9
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
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- 239000007787 solid Substances 0.000 claims description 6
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- 238000004537 pulping Methods 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 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 abstract description 9
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- 239000000463 material Substances 0.000 description 4
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- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 description 1
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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
- C02F3/28—Anaerobic digestion processes
- C02F3/2866—Particular arrangements for anaerobic reactors
-
- 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
- C02F3/28—Anaerobic digestion processes
- C02F3/2846—Anaerobic digestion processes using upflow anaerobic sludge blanket [UASB] reactors
-
- 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
- C02F2101/163—Nitrates
-
- 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
- C02F2101/166—Nitrites
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
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- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
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Abstract
The invention discloses a denitrification device and a denitrification method for wastewater with a low carbon-nitrogen ratio. The denitrification device comprises a water inlet tank, a pipeline mixer, a siphoning type pulse water distributor, an autotrophic denitrification reactor and a sand filter tank which are sequentially connected through pipelines, wherein a dosing device is arranged at the water inlet end of the pipeline mixer, the autotrophic denitrification reactor is sequentially provided with a water distribution pipeline system, a degassing flushing pipeline system, a first-stage three-phase separator and a second-stage three-phase separator from bottom to top, and the water distribution pipeline system is connected with the siphoning type pulse water distributor. The denitrification device is used for denitrification of wastewater with low carbon-nitrogen ratio, has the advantages of high denitrification efficiency, thorough denitrification, large treatment load, low operation cost, stable operation and the like, and can treat high-concentration nitrate nitrogen wastewater.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a denitrification device and a low-carbon-nitrogen-ratio wastewater denitrification method.
Background
The biochemical COD of the general influent water of the industrial wastewater is lower, the total nitrogen is higher, the carbon source of the influent water cannot meet the requirement of the traditional nitrification and denitrification nitrogen removal, a large amount of carbon sources (such as methanol, glucose, sodium acetate and the like) need to be added, and the nitrogen removal cost is high. The sulfur autotrophic denitrification uses sulfur as an electron donor, and utilizes sulfur bacteria to convert nitrate nitrogen into nitrogen for removal under the anoxic condition. The sulfur autotrophic denitrification technology has the advantages of low operation cost, no need of additional addition of organic carbon source, low growth rate of autotrophic bacteria, low sludge yield and the like, and is suitable for denitrification of wastewater with low carbon-nitrogen ratio.
At present, granular sulfur is mostly adopted as a reaction material in the sulfur autotrophic denitrification technology, and the main reactors are a filter bed denitrification reactor and a fluidized bed denitrification reactor. The filter bed denitrification reactor is a reactor which utilizes granular sulfur or sulfur-containing composite material as filter bed filler, and the granular sulfur is used as reaction materials which are continuously consumed on one hand and also used as a carrier for sulfur bacteria to adhere and grow on the other hand. The filter bed denitrification reactor has obvious defects: 1) the microbial film may cover the filler to cause reaction obstruction, and the microbial film is easy to fall off along with sulfur consumption, and finally the denitrification efficiency is reduced; 2) the filter bed reactor has short retention time and is not suitable for treating high-concentration nitrate nitrogen wastewater. The fluidized bed reactor needs extra energy to keep the granular sulfur in a fluidized state, the energy consumption is high, the sulfur autotrophic denitrification reaction process is a solid-liquid mass transfer process, the adding amount of the sulfur needs to be increased to improve the denitrification rate, and the medicament cost is high.
Therefore, it is highly desirable to develop a denitrification apparatus and method that has high denitrification efficiency, low operation cost, stable operation, and can treat high-concentration nitrate nitrogen wastewater.
Disclosure of Invention
The invention aims to provide a denitrification device and a method for denitrifying wastewater with a low carbon-nitrogen ratio.
The technical scheme adopted by the invention is as follows:
a denitrification device comprises a water inlet tank, a pipeline mixer, a siphoning type pulse water distributor, an autotrophic denitrification reactor and a sand filter tank which are sequentially connected through pipelines, wherein a dosing device is arranged at the water inlet end of the pipeline mixer, the autotrophic denitrification reactor is sequentially provided with a water distribution pipeline system, a degassing flushing pipeline system, a first-stage three-phase separator and a second-stage three-phase separator from bottom to top, and the water distribution pipeline system is connected with the siphoning type pulse water distributor.
Preferably, a water inlet system is arranged between the water inlet pool and the pipeline mixer.
Preferably, the dosing device consists of a sodium bicarbonate dosing device and a powdered sulfur dosing device.
Preferably, the sodium bicarbonate dosing device comprises a solid sodium carbonate dosing unit, a dissolving unit and a dosing pump unit.
Preferably, the powder sulfur dosing device comprises a powder sulfur dosing unit, a pulping unit and a metering dosing pump unit.
Preferably, the autotrophic denitrification reactor is provided with a sludge discharge system.
Preferably, the sand filter is provided with a drainage system.
A low carbon nitrogen ratio wastewater denitrification method adopts the denitrification device to treat low carbon nitrogen ratio wastewater, and specifically comprises the following steps: introducing the wastewater with low carbon-nitrogen ratio into a pipeline mixer from a water inlet tank, adding powdered sulfur and sodium bicarbonate by a dosing device, introducing the wastewater with low carbon-nitrogen ratio into a siphon type pulse water distributor, introducing the wastewater with low carbon-nitrogen ratio into an autotrophic denitrification reactor through a water distribution pipeline system connected with the siphon type pulse water distributor for denitrification, introducing the effluent of the autotrophic denitrification reactor into a sand filter tank for further denitrification, and discharging the effluent of the sand filter tank outside.
Preferably, the concentration of suspended solids in the mixed liquid in the autotrophic denitrification reactor is 6 g/L-40 g/L.
Preferably, the ascending flow velocity of the autotrophic denitrification reactor (the flow velocity of the mixed liquid in the autotrophic denitrification reactor from bottom to top) is less than 0.6 m/h. The siphon type pulse water distributor directly and rapidly introduces the wastewater to the bottom of the autotrophic denitrification reactor in a pulse mode, the inlet water is mixed with the sludge in the autotrophic denitrification reactor and then flows upwards from the bottom of the reactor, and the rising flow rate is influenced by the water distribution amount of each pulse and the volume of the autotrophic denitrification reactor.
Preferably, the water distribution period of the siphon type pulse water distributor is 5 min/time to 8 min/time. The water distribution flow of the siphon type pulse water distributor is as follows: the siphon type pulse water distributor starts to feed water, when the water reaches a certain liquid level, air in the siphon type pulse water distributor is emptied to generate a siphon effect, the water fed into the siphon type pulse water distributor rapidly enters the water distribution pipeline system to distribute water, when the liquid level in the siphon type pulse water distributor is lowered to eliminate the siphon effect, the water distribution is finished, and a pulse water distribution period is completed.
Preferably, the filter material in the sand filter is ceramsite with the particle size of 6 nm-9 mm.
Preferably, the empty bed retention time of the filter material in the sand filter is 15-30 min.
The invention has the beneficial effects that: the denitrification device is used for denitrification of wastewater with low carbon-nitrogen ratio, has the advantages of high denitrification efficiency, thorough denitrification, large treatment load, low operation cost, stable operation and the like, and can treat high-concentration nitrate nitrogen wastewater.
Specifically, the method comprises the following steps:
1) the sulfur in the denitrification device is added in a powder form, the surface area of the sulfur participating in the reaction is obviously increased, the denitrification rate is greatly improved, the treatment load of the reactor is increased, MLSS (mixed liquor suspended solid concentration) in the reactor can be flexibly adjusted according to the total nitrogen of the inlet water, the abundance of sulfur bacteria is obviously increased, the hydraulic retention time of the reactor is obviously shortened, the denitrification is thorough, and sludge discharge is basically not needed;
2) the effluent of the autotrophic denitrification reactor in the denitrification device is filtered through the sand filter, so that the filtering capacity of the filter bed can be exerted, and meanwhile, the filter bed can also intercept activated sludge and powdered sulfur carried by the effluent for further denitrification;
3) the denitrification device utilizes the siphon type pulse water distributor to provide power for maintaining the sludge bed layer and ensures that the wastewater is fully contacted with the sludge and the powdered sulfur;
4) the denitrification device adopts a spraying degassing and two-stage three-phase separation device, and can effectively prevent the reactor from leaking mud.
Drawings
FIG. 1 is a schematic view showing the structure of a denitrification apparatus according to the present invention.
FIG. 2 is a diagram showing the results of water quality measurements of the influent and effluent of the autotrophic denitrification reactor of the denitrification apparatus according to the present invention.
The attached drawings indicate the following: 10. a water inlet pool; 20. a pipeline mixer; 30. a siphon type pulse water distributor; 40. an autotrophic denitrification reactor; 401. a water distribution pipeline system; 402. degassing and flushing the pipeline system; 403. a first stage three-phase separator; 404. a second stage three-phase separator; 50. a sand filter; 60. a dosing device; 70. a water intake system; 80. a sludge discharge system; 90. and (4) a drainage system.
Detailed Description
The invention will be further explained and illustrated with reference to specific examples.
Example (b):
as shown in figure 1, the denitrification device comprises a water inlet pool 10, a pipeline mixer 20, a siphon-type pulse water distributor 30, an autotrophic denitrification reactor 40 and a sand filter pool 50 which are sequentially connected through pipelines, wherein a chemical adding device 60 is arranged at the water inlet end of the pipeline mixer 20, a water distribution pipeline system 401, a degassing flushing pipeline system 402, a first-stage three-phase separator 403 and a second-stage three-phase separator 404 are sequentially arranged at the bottom of the autotrophic denitrification reactor 40 from bottom to top, the water distribution pipeline system 401 is connected with the siphon-type pulse water distributor 30, a water inlet system 70 is arranged between the water inlet pool 10 and the pipeline mixer 20, the water inlet system 70 comprises a water inlet pipeline and a water inlet pump, the chemical adding device 60 comprises a sodium bicarbonate chemical adding device and a powdered sulfur chemical adding device, the sodium bicarbonate chemical adding device comprises a solid sodium carbonate chemical adding unit, a dissolving unit and a metering chemical adding pump unit, the powdered sulfur chemical adding device comprises a sulfur chemical adding unit, The device comprises a pulping unit and a metering dosing pump unit, wherein a sludge discharge system 80 is arranged at the bottom of the autotrophic denitrification reactor 40, the sludge discharge system 80 comprises a sludge discharge pipeline and a sludge discharge pump, a drainage system 90 is arranged at the bottom of the sand filter, and the drainage system 90 comprises a drainage pipeline and a drainage pump.
Sewage treatment: simulated low carbon-nitrogen ratio wastewater (prepared by adding sodium nitrate into tap water, the wastewater does not contain COD (chemical oxygen demand), namely the wastewater does not contain a denitrification carbon source and only passes through sulfur autotrophic denitrification).
The sewage treatment step:
and (2) introducing the simulated low-carbon-nitrogen-ratio wastewater into the denitrification device, operating in a continuous water inlet and outlet mode, wherein the treatment scale is 0.375L/h, sodium bicarbonate required to be consumed by autotrophic denitrification is added into the simulated low-carbon-nitrogen-ratio wastewater in advance, and the powdered sulfur is 200-400 meshes of powdered sulfur. The sludge in the autotrophic denitrification reactor is domesticated for a period of time, the autotrophic denitrification sulfur bacteria are cultured, and then the operation data are detected, and the test data are shown in figure 2.
As can be seen from fig. 2:
in the operation process of 6 months and 8 days to 6 months and 18 days, the MLSS: 3000 mg/L-5000 mg/L, HRT (high resolution transformation) is 8h, the concentration of nitrate nitrogen in inlet water is 30 mg/L-50 mg/L, and the concentration of nitrate and nitrite in outlet water of the autotrophic denitrification reactor are both less than 0.1 mg/L;
in the operation process of 18 days in 6 months to 8 days in 7 months, the sulfur adding amount is increased, and the MLSS: 5000-6000 mg/L, HRT (high temperature recovery) is kept unchanged and is still 8 hours, the load of the nitrate nitrogen in the inlet water is increased, the concentration of the nitrate nitrogen in the inlet water is increased to 70-90 mg/L, the concentrations of the nitrate nitrogen and the nitrite nitrogen in the outlet water of the autotrophic denitrification reactor are stabilized to be less than 5mg/L, the operation day of poor water quality of the outlet water is the three-phase separation difference in the denitrification process, and sulfur bacteria air floatation escape is caused because the adjustment is not carried out in time at the weekend;
in the operation process of 7 months and 8 days to 8 months and 7 days, the sulfur adding amount is increased, and the MLSS: 6000 mg/L-8000 mg/L, HRT is shortened to 4h, the nitrogen concentration of the nitrate in the inlet water is 70 mg/L-90 mg/L, the nitrogen concentration of the nitrate in the outlet water is less than 10mg/L when the autotrophic denitrification reactor normally operates, the separation effect of nitrogen, sulfur and sulfur bacteria generated by denitrification of an experimental device is limited due to the limitation of the experimental scale during the operation, the three-phase separation effect is poor, the sludge bed layer is floated and runs out sludge, the quality of the outlet water is influenced, the treatment effect can be quickly recovered by optimizing the three-phase separation and adding sulfur to maintain MLSS, and the nitrogen concentration of the nitrate in the outlet water is less than 5 mg/L.
The continuous operation test only tests partial denitrification effect of the pulse reaction zone (the pulse reaction zone is formed by the siphon type pulse water distribution device, the water distribution pipeline system, the degassing and flushing pipeline system, the first-stage three-phase separator, the second-stage three-phase separator and the sludge discharge pipeline system), and the denitrification effect of the filter reaction zone (sand filter) is not tested. Therefore, the autotrophic denitrification reactor is determined to have large treatment load from a continuous operation test, the denitrification efficiency can be improved by adjusting the MLSS, and the sludge leakage problem of the pulse reaction area of the autotrophic denitrification reactor can be solved by combining the arrangement of the filter bed area.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. A denitrification device is characterized in that: the denitrification device comprises a water inlet tank, a pipeline mixer, a siphon type pulse water distributor, an autotrophic denitrification reactor and a sand filter tank which are sequentially connected through pipelines; a dosing device is arranged at the water inlet end of the pipeline mixer; the autotrophic denitrification reactor is sequentially provided with a water distribution pipeline system, a degassing flushing pipeline system, a first-stage three-phase separator and a second-stage three-phase separator from bottom to top; the water distribution pipeline system is connected with the siphon type pulse water distributor.
2. The denitrification apparatus according to claim 1, wherein: and a water inlet system is arranged between the water inlet pool and the pipeline mixer.
3. The denitrification apparatus according to claim 1 or 2, wherein: the medicine adding device consists of a sodium bicarbonate medicine adding device and a powder sulfur medicine adding device.
4. The denitrification apparatus according to claim 3, wherein: the sodium bicarbonate dosing device comprises a solid sodium carbonate dosing unit, a dissolving unit and a metering dosing pump unit.
5. The denitrification apparatus according to claim 3, wherein: the powder sulfur dosing device comprises a powder sulfur dosing unit, a pulping unit and a metering dosing pump unit.
6. The denitrification apparatus according to claim 1 or 2, wherein: the autotrophic denitrification reactor is provided with a sludge discharge system.
7. The denitrification apparatus according to claim 1 or 2, wherein: the sand filter is provided with a drainage system.
8. A method for denitrifying wastewater with a low carbon-nitrogen ratio is characterized in that the denitrification device of any one of claims 1 to 7 is used for treating the wastewater with the low carbon-nitrogen ratio, and comprises the following steps: introducing the wastewater with low carbon-nitrogen ratio into a pipeline mixer from a water inlet tank, adding powdered sulfur and sodium bicarbonate by a dosing device, introducing the wastewater with low carbon-nitrogen ratio into a siphon type pulse water distributor, introducing the wastewater with low carbon-nitrogen ratio into an autotrophic denitrification reactor through a water distribution pipeline system connected with the siphon type pulse water distributor for denitrification, introducing the effluent of the autotrophic denitrification reactor into a sand filter tank for further denitrification, and discharging the effluent of the sand filter tank outside.
9. The method for denitrifying low carbon-nitrogen ratio wastewater according to claim 8, wherein: the concentration of the mixed liquid suspended solid in the autotrophic denitrification reactor is 6-40 g/L.
10. The method for denitrifying low carbon-nitrogen ratio wastewater according to claim 8 or 9, wherein: the water distribution period of the siphon type pulse water distributor is 5 min/time to 8 min/time.
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| CN114455781A (en) * | 2022-03-01 | 2022-05-10 | 南京大学 | Cooperative treatment device for treating secondary biochemical tail water and coupling treatment method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106630134A (en) * | 2016-12-29 | 2017-05-10 | 北京恩菲环保股份有限公司 | High-efficiency denitrification nitrogen removal device and method |
| WO2018107740A1 (en) * | 2016-12-14 | 2018-06-21 | 江南大学 | Wastewater nitrogen and phosphorus removal device and application thereof |
| CN108467111A (en) * | 2018-04-10 | 2018-08-31 | 清华大学 | A kind of autotrophic denitrification deep denitrogenation device and autotrophy deep denitrification method |
| CN212450827U (en) * | 2020-08-24 | 2021-02-02 | 辽宁省环保集团有限责任公司 | External circulation denitrification bioreactor |
| CN112978922A (en) * | 2021-03-29 | 2021-06-18 | 武汉森泰环保股份有限公司 | Efficient pulse water distribution anaerobic sludge denitrification reaction method and device |
-
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018107740A1 (en) * | 2016-12-14 | 2018-06-21 | 江南大学 | Wastewater nitrogen and phosphorus removal device and application thereof |
| CN106630134A (en) * | 2016-12-29 | 2017-05-10 | 北京恩菲环保股份有限公司 | High-efficiency denitrification nitrogen removal device and method |
| CN108467111A (en) * | 2018-04-10 | 2018-08-31 | 清华大学 | A kind of autotrophic denitrification deep denitrogenation device and autotrophy deep denitrification method |
| CN212450827U (en) * | 2020-08-24 | 2021-02-02 | 辽宁省环保集团有限责任公司 | External circulation denitrification bioreactor |
| CN112978922A (en) * | 2021-03-29 | 2021-06-18 | 武汉森泰环保股份有限公司 | Efficient pulse water distribution anaerobic sludge denitrification reaction method and device |
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| CN114455781A (en) * | 2022-03-01 | 2022-05-10 | 南京大学 | Cooperative treatment device for treating secondary biochemical tail water and coupling treatment method |
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