CN113292163A - Device for realizing synchronous nitrification and denitrification of sewage and use method - Google Patents
Device for realizing synchronous nitrification and denitrification of sewage and use method Download PDFInfo
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- CN113292163A CN113292163A CN202110708268.0A CN202110708268A CN113292163A CN 113292163 A CN113292163 A CN 113292163A CN 202110708268 A CN202110708268 A CN 202110708268A CN 113292163 A CN113292163 A CN 113292163A
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- 239000010865 sewage Substances 0.000 title claims abstract description 42
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims description 28
- 238000006243 chemical reaction Methods 0.000 claims abstract description 93
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 66
- 238000005273 aeration Methods 0.000 claims abstract description 39
- 239000010802 sludge Substances 0.000 claims abstract description 39
- 239000007788 liquid Substances 0.000 claims abstract description 14
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 16
- 238000009434 installation Methods 0.000 claims description 15
- 238000005276 aerator Methods 0.000 claims description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 10
- 239000007789 gas Substances 0.000 claims description 10
- 239000001301 oxygen Substances 0.000 claims description 10
- 229910052760 oxygen Inorganic materials 0.000 claims description 10
- 230000000630 rising effect Effects 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 9
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 241000894006 Bacteria Species 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 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 claims description 3
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 claims description 3
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 claims description 3
- 235000013312 flour Nutrition 0.000 claims description 3
- 239000008103 glucose Substances 0.000 claims description 3
- 230000001546 nitrifying effect Effects 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 230000001737 promoting effect Effects 0.000 claims description 2
- 238000010992 reflux Methods 0.000 claims description 2
- 238000003672 processing method Methods 0.000 claims 1
- 230000001174 ascending effect Effects 0.000 abstract 2
- 238000006396 nitration reaction Methods 0.000 abstract 1
- 239000002351 wastewater Substances 0.000 abstract 1
- 230000008569 process Effects 0.000 description 7
- 244000005700 microbiome Species 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 241001453382 Nitrosomonadales Species 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000036284 oxygen consumption Effects 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
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- 235000020774 essential nutrients Nutrition 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 235000015097 nutrients Nutrition 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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/02—Temperature
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/22—O2
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/38—Gas flow rate
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
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- Organic Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
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Abstract
The invention discloses a device for realizing synchronous nitrification and denitrification of sewage, which comprises a reaction cavity and a denitrification device, wherein the reaction cavity comprises: the device comprises a water inlet pipeline, a water inlet guide plate, a reactor intermediate baffle plate, an overflowing guide plate, a sludge settling inclined plate, a perforated aeration pipe and an overflowing weir plate. The reaction cavity is divided into a water inlet area, a nitration reaction area and a sludge settling area; the reactor intermediate baffle is obliquely arranged to divide the whole reactor into two parts, the upper end of the baffle is connected with the overflowing guide plate, the bottom end of the baffle is communicated, the bottom end of the baffle is laid with the perforated aeration pipe, and the two sides of the baffle are sequentially formed into a sludge mixed liquid ascending and descending flow field by utilizing the lifting force of bubbles. The nitrogen-containing wastewater is subjected to nitrification reaction after being aerated and mixed, and enters a settling zone through a flow guide plate to be subjected to denitrification reaction. The mud-water mixture deposited at the bottom of the settling zone passes through the bottom channel of the intermediate baffle plate by the traction of the bubbles and enters the ascending flow field again. The system realizes unpowered backflow and circular treatment by reasonably arranging the guide plate and the aeration device.
Description
Technical Field
The invention relates to the technical field of biological denitrification, in particular to a device for realizing synchronous nitrification and denitrification of sewage and a using method thereof.
Background
Nitrogen is an essential nutrient element in the growth and propagation process of microorganisms, but the nitrogen content in natural water is too high, so that water eutrophication is easily caused, the wild growth of lower organisms (such as blue algae) in the water is caused, and finally the water is blackened and smelled. The method for removing nitrogen element in water body mainly includes physical chemical method, microorganism activated sludge method and other methods.
The ammonia nitrogen sewage is treated by a physical and chemical method, and the treatment process is mainly a treatment process for forcing ammonia nitrogen in the sewage to be converted or oxidized and reduced by a physical and chemical means. In industrial applications, the stripping method, the chemical precipitation method, the breakpoint chlorination method, the ion exchange method, and the like are mainly used.
The denitrification by the microorganism activated sludge method generally means that under the action of specific microorganisms in activated sludge, NH4+ -N in sewage is oxidized into N2 through a series of processes of microorganism metabolism, ammoniation reaction, nitrification, denitrification and the like, so that the sewage denitrification is realized. The biological denitrification method has the great advantages of stable treatment effect, wide application range and the like, and is widely applied to industry.
In the conventional biological denitrification process, a nitrification reaction and a denitrification reaction are separately arranged in two different reactors, NH4 < + > -N in sewage is firstly oxidized into NO2 < - > -N by Ammonia Oxidizing Bacteria (AOB) in a nitrification stage, then NO2 < - > -N is oxidized into NO3 < - > -N by Nitrite Oxidizing Bacteria (NOB), and then NO2 < - > -N, NO3 < - > -N is reduced into N2 by denitrification bacteria. Therefore, the whole process flow is longer, the occupied area is larger, and the project investment cost is higher.
Synchronous Nitrification and Denitrification (SND) realizes simultaneous nitrification and denitrification in the same reactor by utilizing the interaction of multiple denitrification bacteria in a structure, has the advantages of small occupied area, low oxygen consumption, no need of pH value adjustment and the like, but has more environmental factors influencing the denitrification effect of synchronous nitrification and denitrification, such as Dissolved Oxygen (DO), nutrient ratio (C/N), pH, sludge concentration (MLSS), sludge age (SRT) and the like, and has more complex operation, so that the optimal operation condition is difficult to control in the actual engineering.
Disclosure of Invention
In order to solve the problems in the background art, the invention aims to provide the sewage denitrification treatment device which can realize synchronous nitrification and denitrification, has short process flow, unpowered sludge backflow and good effluent quality and is simple to control.
In order to achieve the purpose, the invention provides the following technical scheme:
a device for realizing synchronous nitrification and denitrification of sewage comprises an aerator, a gas flowmeter and a reaction cavity; the reaction cavity mainly comprises a reaction tank body, a water inlet pipe, a water inlet guide plate, an overflowing guide plate, a reactor intermediate partition plate, a sludge settling zone inclined plate, an automatic heater, a perforated aeration pipe and an overflow weir; the water inlet guide plate, the overflowing guide plate, the reactor intermediate baffle plate and the sludge settling zone inclined plate are sequentially and fixedly arranged on the side wall of the reaction tank body to divide the reaction tank body into a water inlet zone, a reaction zone and a settling zone; the aerator and the gas flowmeter are connected with the perforated aerator pipe in the reaction cavity through a gas pipeline.
Further, the device also comprises a temperature controller, wherein the temperature controller is arranged at the upper part of the reaction zone; the automatic heater is arranged at the lower part of the reaction zone; the water inlet guide plate is arranged close to the water inlet and forms a water inlet area with the side wall of the reaction tank body; the water inlet guide plate is installed in an inclined mode, the included angle between the water inlet guide plate and the bottom of the reaction tank body ranges from 45 degrees to 60 degrees, and the top end of the water inlet guide plate is flush with the total height of the reaction tank body.
Furthermore, the overflowing guide plate is installed in an inclined mode, the included angle between the overflowing guide plate and the bottom of the reaction tank body ranges from 10 degrees to 15 degrees, the top end of the overflowing guide plate is 1-10cm lower than the top end of the overflowing weir, and the bottom end of the overflowing guide plate is 5-10cm higher than the bottom end of the water inlet guide plate.
Furthermore, the intermediate baffle of the reactor adopts an inclined installation mode, the included angle between the intermediate baffle and the bottom of the reaction tank body is 75-85 degrees, and the top end of the intermediate baffle is positioned at the position of the overflowing guide plate 2/3.
Furthermore, the perforated aeration pipe is horizontally installed, and the installation position is positioned right below the bottom end of a partition plate in the reactor; the aeration pipe is provided with holes staggered by 45 degrees downwards, the positions of the holes face to the water inlet side, and the hole diameter of the holes is 1-5 mm.
Furthermore, the inclined plate of the sludge settling zone adopts an inclined installation mode, the installation position is positioned on the left side of the aeration pipe, and the included angle between the inclined plate and the bottom of the reaction tank body is 45-65 degrees.
A synchronous nitrification and denitrification denitrogenation method for sewage mainly comprises the following steps: a) introducing sewage into a reaction cavity filled with activated sludge, changing the flow direction of the sewage through the diversion of a water inlet diversion plate, promoting the nitrogen-containing sewage to flow to the bottom of a reaction tank and mixing with the activated sludge in a reaction zone; b) dissolved oxygen is provided by an aeration system, and nitrification reaction is carried out by nitrifying bacteria; c) the buoyancy caused by the rising of bubbles in the aeration pipe drives the sludge mixed liquid to slowly enter the settling zone through the overflowing guide plate; d) in the precipitation zone, due to the reduction of dissolved oxygen, denitrification reaction occurs in the system; one part of sewage overflows out of the reactor through an overflow weir, the other part of the sludge-water mixture passes through a channel at the bottom end of a middle clapboard of the reactor, the traction force generated by the rising of aeration bubbles of the perforated aeration pipe flows back to the reaction zone and is mixed with the mixed liquid in the reaction zone, and the reflux liquid, the nitrified sludge mixed liquid and the nitrogen-containing sewage form circulation in the reaction zone under the combined action of the impact force of the inflow water flow and the buoyancy caused by the rising of the bubbles, thereby realizing circulation, unpowered backflow, unpowered mixing and stirring and synchronous nitrification and denitrification nitrogen removal.
Further, when the aeration system provides aeration, the concentration of Dissolved Oxygen (DO) in the reaction zone is controlled to be 1.0-2.5 mg/L.
Further, the sludge concentration (MLSS) in the reaction zone is controlled to be 3500 mg/L-5500 mg/L, and the sludge age (SRT) is controlled to be 30-35 d.
Further, controlling the pH value of the inlet water to be 7.5-8.0; controlling the carbon-nitrogen ratio (C/N) of inlet water to be 1: 1-3: 1; if the carbon source of the influent is insufficient, the carbon source is additionally added, and the carbon source comprises but is not limited to glucose, methanol, ethanol, flour and the like.
Compared with the prior art, the invention has the beneficial effects that:
through the unique design of the interior of the device for synchronous nitrification and denitrification of the sewage, the inflow guide plate changes the inflow direction of the inflow water, so that the inflow water rapidly flows towards the bottom of the reaction tank and is mixed with the sludge in the reaction zone to generate nitrification reaction, and then slowly enters the sedimentation zone through the overflowing guide plate; after the sedimentation, a part of upper clear water overflows out of the system through an overflow weir, a part of mud-water mixture passes through a channel at the bottom end of a middle clapboard of the reactor, flows back to the reaction zone by the traction force generated by aeration bubble rising of a perforated aeration pipe, is mixed with the mixed liquid in the reaction zone, and forms a circular flow in the reaction zone, thereby achieving the purposes of unpowered backflow, unpowered mixing and stirring, and synchronous nitrification and denitrification.
The perforation aeration pipe adopts the mode of adopting horizontal installation, and the mounted position is located the reactor intermediate barrier bottom under, can play the function of aeration, can increase the mobility of sewage in the reaction tank again, increases the effect of aeration promptly.
Through the unique design of this application, further highlighted synchronous nitrification denitrification device take up an area of for a short time, the oxygen consumption is few, need not advantages such as pH value of adjusting.
The method is simple to operate, and the optimal operation condition of the method is easy to control in practical engineering.
Drawings
FIG. 1 is a sectional view of the internal structure of a device for realizing synchronous nitrification and denitrification of sewage
The labels in the figure are: 1. a reaction tank body; 2. a water inlet; 3. a water inlet guide plate; 4. a temperature controller; 5. an overflowing guide plate; 6. a reactor intermediate partition plate; 7. an overflow weir; 8. a sludge settling zone inclined plate; 9. an aerator; 10. a gas flow meter; 11. perforating an aeration pipe; 12. an automatic heater.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, in the embodiment of the present invention, an apparatus for realizing synchronous nitrification and denitrification of sewage includes an aerator 9, a gas flow meter 10, and a reaction chamber; the reaction cavity mainly comprises a reaction tank body 1, a water inlet pipe 2, a water inlet guide plate 3, a temperature controller 4, an overflowing guide plate 5, a reactor intermediate baffle plate 6, a sludge settling zone inclined plate 8, an automatic heater 12, a perforated aeration pipe 11 and an overflow weir 7; a water inlet guide plate 3, an overflowing guide plate 5, a reactor intermediate baffle plate 6 and a sludge settling zone inclined plate 8 are sequentially and fixedly arranged on the side wall of the reaction tank body 1 to divide the reaction tank body 1 into a water inlet zone, a reaction zone and a settling zone; the aerator 9 and the gas flowmeter 10 are connected with a perforated aerator pipe 11 in the reaction cavity through a gas pipeline; the temperature controller 4 is arranged at the upper part of the reaction zone; the automatic heater 12 is disposed at the lower portion of the reaction zone.
The water inlet guide plate 3 is obliquely installed, and forms a further included angle with the bottom of the reaction tank body 1, and the water inlet guide plate 3 is arranged close to the water inlet 2 and forms a water inlet area with the side wall of the reaction tank body 1; the water inlet guide plate 3 adopts an inclined installation mode, the included angle between the water inlet guide plate and the bottom of the reaction tank body 1 is 45-60 degrees, and the top end of the water inlet guide plate is totally high with the reaction tank body; the overflowing guide plate 5 adopts an inclined installation mode, the included angle between the overflowing guide plate and the bottom of the reaction tank body 1 is 10-15 degrees, the top end of the overflowing guide plate is 1-10cm lower than the top end of the overflowing weir 7, and the bottom end of the overflowing guide plate is 5-10cm higher than the bottom end of the water inlet guide plate 3; the reactor intermediate baffle 6 adopts an inclined installation mode, the included angle between the reactor intermediate baffle and the bottom of the reaction tank body 1 is 75-85 degrees, and the top end of the reactor intermediate baffle is positioned at 2/3 of the overflowing guide plate 3; the perforated aeration pipe 11 adopts a horizontal installation mode, and the installation position is positioned right below the bottom end of the intermediate baffle 6 of the reactor; the perforated aeration pipe 11 is provided with holes at 45 degrees in a downward staggered manner, the positions of the holes face the water inlet side, and the aperture of the holes is 1-5 mm; the inclined plate 8 of the sludge settling zone is obliquely installed, the installation position is positioned at the left side of the perforated aeration pipe 11, and the included angle between the inclined plate and the bottom of the reaction tank body 1 is 45-65 degrees; when in use, sewage is introduced into the reaction tank body 1 filled with activated sludge, the flow direction of the sewage is changed through the diversion of the water inlet diversion plate 3, and the nitrogen-containing sewage is promoted to flow to the bottom of the reaction tank body 1 and is mixed with the activated sludge in the reaction zone; dissolved oxygen is provided by an aeration system, and nitrification reaction is carried out by nitrifying bacteria; the buoyancy caused by the rising of bubbles of the perforated aeration pipe 11 drives the sludge mixed liquid to slowly enter the settling zone through the overflowing guide plate 5; in the precipitation zone, due to the reduction of dissolved oxygen, denitrification reaction occurs in the system; one part of sewage overflows out of the reaction cavity through an overflow weir 7, the other part of the sludge-water mixture passes through a channel at the bottom end of a middle clapboard 6 of the reactor, and the traction force generated by the rising of aeration bubbles of a perforated aeration pipe 11 flows back to the reaction area and is mixed with the mixed liquid in the reaction area, and under the combined action of the impact force of the inflow water flow and the buoyancy force caused by the rising of the bubbles, the backflow liquid, the nitrified sludge mixed liquid and the nitrogen-containing sewage form circulation in the reaction area, thereby realizing circulation, unpowered backflow, unpowered mixing and stirring, and synchronous nitrification and denitrification; when the aeration system provides aeration, the concentration of Dissolved Oxygen (DO) in the reaction zone is controlled to be 1.0-2.5 mg/L; controlling the sludge concentration (MLSS) in the reaction zone to be 3500 mg/L-5500 mg/L and the sludge age (SRT) of the sludge to be 30-35 d; controlling the pH value of the inlet water to be 7.5-8.0; controlling the carbon-nitrogen ratio (C/N) of inlet water to be 1: 1-3: 1; if the carbon source of the influent is insufficient, the carbon source is additionally added, and the carbon source comprises but is not limited to glucose, methanol, ethanol, flour and the like.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (10)
1. A device for realizing synchronous nitrification and denitrification of sewage is characterized by comprising an aerator, a gas flowmeter and a reaction cavity; the reaction cavity mainly comprises a reaction tank body, a water inlet pipe, a water inlet guide plate, an overflowing guide plate, a reactor intermediate partition plate, a sludge settling zone inclined plate, an automatic heater, a perforated aeration pipe and an overflow weir; the water inlet guide plate, the overflowing guide plate, the reactor intermediate baffle plate and the sludge settling zone inclined plate are sequentially and fixedly arranged on the side wall of the reaction tank body to divide the reaction tank body into a water inlet zone, a reaction zone and a settling zone; the aerator and the gas flowmeter are connected with the perforated aerator pipe in the reaction cavity through a gas pipeline.
2. The device for realizing synchronous nitrification and denitrification of sewage according to claim 1, wherein: the reactor also comprises a temperature controller, wherein the temperature controller is arranged at the upper part of the reaction zone; the automatic heater is arranged at the lower part of the reaction zone; the water inlet guide plate is arranged close to the water inlet and forms a water inlet area with the side wall of the reaction tank body; the water inlet guide plate is installed in an inclined mode, the included angle between the water inlet guide plate and the bottom of the reaction tank body ranges from 45 degrees to 60 degrees, and the top end of the water inlet guide plate is flush with the total height of the reaction tank body.
3. The device for realizing synchronous nitrification and denitrification of sewage according to claim 1, wherein: the overflowing guide plate is installed in an inclined mode, the included angle between the overflowing guide plate and the bottom of the reaction tank body ranges from 10 degrees to 15 degrees, the top end of the overflowing guide plate is 1-10cm lower than the top end of the overflowing weir, and the bottom end of the overflowing guide plate is 5-10cm higher than the bottom end of the water inlet guide plate.
4. The device for realizing synchronous nitrification and denitrification of sewage according to claim 1, wherein: the intermediate baffle of the reactor adopts an inclined installation mode, the included angle between the intermediate baffle and the bottom of the reaction tank body is 75-85 degrees, and the top end of the intermediate baffle is positioned at the position of the overflowing guide plate 2/3.
5. The device for realizing synchronous nitrification and denitrification of sewage according to claim 1, wherein: the perforated aeration pipe is horizontally installed, and the installation position is positioned right below the bottom end of a partition plate in the reactor; the aeration pipe is provided with holes staggered by 45 degrees downwards, the positions of the holes face to the water inlet side, and the hole diameter of the holes is 1-5 mm.
6. The device for realizing synchronous nitrification and denitrification of sewage according to claim 1, wherein: the inclined plate of the sludge settling zone adopts an inclined installation mode, the installation position is positioned on the left side of the aeration pipe, and the included angle between the inclined plate and the bottom of the reaction tank body is 45-65 degrees.
7. A method for synchronous nitrification and denitrification of sewage by using the device for realizing synchronous nitrification and denitrification of sewage according to any one of claims 1 to 6, which is characterized by comprising the following steps: the processing method comprises the following steps: a) introducing sewage into a reaction cavity filled with activated sludge, changing the flow direction of the sewage through the diversion of a water inlet diversion plate, promoting the nitrogen-containing sewage to flow to the bottom of a reaction tank and mixing with the activated sludge in a reaction zone; b) dissolved oxygen is provided by an aeration system, and nitrification reaction is carried out by nitrifying bacteria; c) the buoyancy caused by the rising of bubbles in the aeration pipe drives the sludge mixed liquid to slowly enter the settling zone through the overflowing guide plate; d) in the precipitation zone, due to the reduction of dissolved oxygen, denitrification reaction occurs in the system; one part of sewage overflows out of the reactor through an overflow weir, the other part of the sludge-water mixture passes through a channel at the bottom end of a middle clapboard of the reactor, the traction force generated by the rising of aeration bubbles of the perforated aeration pipe flows back to the reaction zone and is mixed with the mixed liquid in the reaction zone, and the reflux liquid, the nitrified sludge mixed liquid and the nitrogen-containing sewage form circulation in the reaction zone under the combined action of the impact force of the inflow water flow and the buoyancy caused by the rising of the bubbles, thereby realizing circulation, unpowered backflow, unpowered mixing and stirring and synchronous nitrification and denitrification nitrogen removal.
8. The synchronous nitrification and denitrification nitrogen removal treatment method for sewage according to claim 7, characterized in that: when the aeration system provides aeration, the concentration of dissolved oxygen in the reaction zone is controlled to be 1.0-2.5 mg/L.
9. The synchronous nitrification and denitrification nitrogen removal treatment method for sewage according to claim 7, characterized in that: the sludge concentration in the reaction zone is controlled to be 3500 mg/L-5500 mg/L, and the sludge age is controlled to be 30-35 d.
10. The synchronous nitrification and denitrification nitrogen removal treatment method for sewage according to claim 7, characterized in that: controlling the pH value of the inlet water to be 7.5-8.0; controlling the carbon-nitrogen ratio of inlet water to be 1: 1-3: 1; if the carbon source of the influent is insufficient, the carbon source is additionally added, and the carbon source comprises but is not limited to glucose, methanol, ethanol and flour.
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| CA2259517A1 (en) * | 1996-07-10 | 1998-01-15 | Aqua-Aerobic Systems, Inc. | Multi-phase dual cycle influent process |
| CN102173510A (en) * | 2011-03-03 | 2011-09-07 | 浙江工商大学 | Sludge reflow-free device with simultaneous nitrification and denitrification (SND) function and operation control method thereof |
| CN102381818A (en) * | 2011-10-24 | 2012-03-21 | 沈阳建筑大学 | A2N-SBR (Anaerobic-anoxic/nitrification-sequencing batch reactor) process with shortcut nitrification-denitrification denitrifying and dephosphorizing function |
| CN216837332U (en) * | 2021-06-23 | 2022-06-28 | 江西挺进环保科技股份有限公司 | Device for realizing synchronous nitrification and denitrification of sewage |
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- 2021-06-23 CN CN202110708268.0A patent/CN113292163A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2259517A1 (en) * | 1996-07-10 | 1998-01-15 | Aqua-Aerobic Systems, Inc. | Multi-phase dual cycle influent process |
| CN102173510A (en) * | 2011-03-03 | 2011-09-07 | 浙江工商大学 | Sludge reflow-free device with simultaneous nitrification and denitrification (SND) function and operation control method thereof |
| CN102381818A (en) * | 2011-10-24 | 2012-03-21 | 沈阳建筑大学 | A2N-SBR (Anaerobic-anoxic/nitrification-sequencing batch reactor) process with shortcut nitrification-denitrification denitrifying and dephosphorizing function |
| CN216837332U (en) * | 2021-06-23 | 2022-06-28 | 江西挺进环保科技股份有限公司 | Device for realizing synchronous nitrification and denitrification of sewage |
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