CN117003385A - Fluidized bed for sewage denitration and fluidization treatment method thereof - Google Patents
Fluidized bed for sewage denitration and fluidization treatment method thereof Download PDFInfo
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- CN117003385A CN117003385A CN202311238460.3A CN202311238460A CN117003385A CN 117003385 A CN117003385 A CN 117003385A CN 202311238460 A CN202311238460 A CN 202311238460A CN 117003385 A CN117003385 A CN 117003385A
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- sewage
- preset area
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- 239000010865 sewage Substances 0.000 title claims abstract description 83
- 238000005243 fluidization Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 93
- 239000003814 drug Substances 0.000 claims abstract description 54
- 238000006243 chemical reaction Methods 0.000 claims abstract description 37
- 239000000945 filler Substances 0.000 claims abstract description 24
- 238000003756 stirring Methods 0.000 claims abstract description 17
- 239000002245 particle Substances 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 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 claims description 34
- 229940079593 drug Drugs 0.000 claims description 16
- 239000000126 substance Substances 0.000 claims description 13
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 235000006506 Brasenia schreberi Nutrition 0.000 claims description 4
- 230000001651 autotrophic effect Effects 0.000 abstract description 18
- 244000005700 microbiome Species 0.000 abstract description 13
- 239000000463 material Substances 0.000 abstract description 7
- 238000005259 measurement Methods 0.000 abstract description 6
- 230000035484 reaction time Effects 0.000 abstract description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 21
- 229910052717 sulfur Inorganic materials 0.000 description 18
- 239000011593 sulfur Substances 0.000 description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- 238000012856 packing Methods 0.000 description 7
- 239000000047 product Substances 0.000 description 6
- 241000894006 Bacteria Species 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 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
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 229910001037 White iron Inorganic materials 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- -1 hydrogen ions Chemical class 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 1
- 229910052683 pyrite Inorganic materials 0.000 description 1
- 239000011028 pyrite Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000010517 secondary reaction Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- 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
- C02F3/2833—Anaerobic digestion processes using fluidized bed 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
- C02F3/2806—Anaerobic processes using solid supports for microorganisms
-
- 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- 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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/15—N03-N
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Life Sciences & Earth Sciences (AREA)
- 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)
Abstract
The invention relates to a fluidized bed for sewage denitration and a fluidization treatment method thereof, wherein the fluidization method comprises the following steps: the sewage is conveyed into the preset area through a water inlet pipe, the quantity of the medicine to be supplied in the preset area and the quantity of the medicine to be supplied in the fluidization area are calculated respectively, a first medicine to be supplied in the preset area and the sewage are conveyed to be mixed, and then the first reaction is carried out with the braided belt type biological filler; and then conveying a second medicine to be supplied to the fluidization area, stirring and mixing the second medicine to be supplied with sewage again, and then carrying out a second reaction with the particle filler, and flowing out from a drain pipe after the reaction, so that fluidization treatment is finished. Compared with the prior art, the invention has the remarkable advantages that: by setting up double preset links, the problem that autotrophic denitrification microorganisms cannot fully react when sewage and medicine materials are mixed at one time is solved; the autotrophic denitrifying microorganism is given enough reaction time after two times of medicine mixing; meanwhile, a water quality monitor is additionally arranged on the dosing pump, so that a proper amount of the delivered medicine is ensured, and the measurement requirements in each sewage treatment link are met.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a fluidized bed for sewage denitration and a fluidization treatment method thereof.
Background
Sulfur autotrophic denitrification is increasingly valued by environmental engineers because of its excellent denitrification performance and the capability of meeting the requirements of effluent COD and TN reaching standards. The current sulfur autotrophic denitrification technology adopts sulfur to be made into particle filler, and the particle filler is used as a slow-release electron donor to be gradually consumed in a water treatment system until the sulfur is eliminated. In practical applications, when the slow release of electrons is uncontrolled, various problems may arise, including:
(one) unstable water quality: because the filler is slowly released, the filler is continuously consumed in the water treatment process, and the consumed filler is made up by adopting an excessive design method conventionally, so that the water quality is ensured to reach the standard. When the filling material is put into use, the water quality is generally superior to the design standard, and when the filling material is consumed to the critical thickness, the yielding water cannot be ensured to reach the standard, and the filling material is required to be supplemented in an excessive state. When the quality of the inflow water fluctuates, the supply quantity of the electron donor cannot be regulated, and the risk of exceeding the standard of the outflow water is increased. In addition, after each back flushing, the dissolved oxygen in the packing layer is increased, and the denitrification activity needs to be recovered within 1-2 hours after back flushing, so that the operation is unstable.
And (II) equipment corrosion: autotrophic denitrification consumes alkalinity and generates hydrogen ions when denitrification is performed by taking sulfur as an electron donor, and simultaneously, filamentous bacteria can grow to be attached to the surfaces of equipment and pool walls under the illumination condition to corrode the equipment and pool bodies; the hydrogen sulfide generated on the pool wall is easy to generate the odor of the stinky egg, so that the operation environment is deteriorated; when the nitrate nitrogen concentration to be removed is too high, the effluent is acidic, and the treated water is milky white, so that the pH of the effluent is unqualified.
Document 1: chinese patent No. CN201710425598.2 discloses a UBF reactor, system and denitrification method using anaerobic ammoxidation-sulfur autotrophic denitrification coupling denitrification, wherein the toxic and harmful high-concentration COD wastewater is treated by limestone and pyrite as pretreatment technologies; however, the UBF reactor has limited space, so that the reaction time between limestone and sewage is insufficient, the flocculation process is slow, the anaerobic reaction of the white iron ore is not timely caused to cause the insufficient yield of an electron acceptor and unstable denitrification, the actual integral effluent quality is poor, and the application scene requirement of large sewage treatment capacity cannot be met.
Disclosure of Invention
The invention aims to provide a fluidized bed for sewage denitration and a fluidization treatment method thereof, which inhibit the generation of hydrogen sulfide by controlling the addition amount of an electron donor, so that a sulfur autotrophic denitrification microorganism carrier circulates in the fluidized bed, the sulfur autotrophic denitrification microorganism is prevented from being differentiated into sulfate reducing bacteria, and the aim of maintaining the pH of effluent within a reasonable range is fulfilled.
The technical solution for realizing the purpose of the invention is as follows:
the fluidized bed for sewage denitration comprises a reaction component, wherein the reaction component comprises a preset area and a fluidization area, and the preset area is provided with a water inlet pipe; wherein:
a filling grid and a first stirrer vertically penetrating through the filling grid are arranged in the preset area, stirring blades of the first stirrer are positioned below the filling grid, and braid type biological fillers are arranged in the filling grid;
the fluidized zone is internally provided with a granular packing, a guide cylinder and a second stirrer vertically placed in the guide cylinder, the preset zone is communicated with the guide cylinder through a conveying pipe, and the opening of the guide cylinder is upward.
Further, the reaction member is also provided with a buffer zone, the buffer zone is communicated with the fluidization zone through a water discharge hole, the fluidization zone is provided with a water discharge hole, and the buffer zone is provided with a water outlet pipe.
Further, the reaction member is connected with a dosing pump for delivering the drug to the preset zone and/or the fluidization zone.
Further, when the dosing pump conveys the medicine materials to the preset area, the output end of the dosing pump is positioned at the water inlet of the water inlet pipe.
Further, when the dosing pump delivers the charge to the fluidization area, the output end of the dosing pump is positioned in the guide cylinder.
Further, dividing the preset area into a first preset area and a second preset area, wherein the first preset area is communicated with the second preset area through a water hole, and the output end of the dosing pump is positioned at the outlet of the water hole; the second preset area is communicated with the guide cylinder through a conveying pipe; and a third stirrer vertically penetrating through the filling grid is arranged in the second preset area, and stirring blades of the third stirrer are positioned below the filling grid.
Further, the dosing pump is provided with a water quality monitor, and the water quality monitor is used for detecting water quality parameters of sewage flowing through the water inlet pipe.
A fluidized treatment method based on a fluidized bed for sewage denitration, comprising the following steps:
conveying sewage into a preset area through a water inlet pipe;
calculating the quantity of first to-be-supplied medicines in a preset area, conveying the first to-be-supplied medicines in the preset area into the preset area through a medicine adding pump, starting a first stirrer to stir and mix sewage and the medicines, and performing a first reaction between the mixed sewage and braided belt type biological fillers in the preset area, wherein the sewage after the first reaction flows into a guide cylinder in a fluidization area along a conveying pipe;
calculating the quantity of second medicine to be supplied in the fluidization area, conveying the second medicine to be supplied in the fluidization area into the guide cylinder through the medicine adding pump, starting the second stirrer to stir and remix the sewage after the first reaction, enabling the sewage after remixing to overflow outwards along the opening of the guide cylinder, carrying out the second reaction with the particle filling in the preset area, and enabling the sewage after the second reaction to enter the buffer area along the drain hole;
and (5) the sewage after the second reaction flows out from the water outlet pipe, and the fluidization treatment is finished.
Further, dividing the quantity of the first medicine to be supplied in the preset area into two parts with the same or different proportion components for respective transportation, firstly transporting one part of the first medicine to be supplied to the preset area, mixing with sewage for a period of time, and then transporting the other part of the first medicine to be supplied to the preset area.
Further, the quantity of the medicine to be supplied in the preset area/the fluidization area is calculated according to the water quality parameters of the sewage. The water quality parameters comprise the inlet nitrate nitrogen content, the inlet alkalinity content and the outlet target nitrate nitrogen content of the sewage, and the types of the to-be-supplied medicine materials comprise electron donors and alkalinity substances, and at least one type is put in each time.
The input amount of the electron donor is determined by the difference between the content of the inflow nitrate nitrogen and the content of the outflow target nitrate nitrogen; the adding amount of the alkalinity substance is determined by the content of the inlet nitrate nitrogen, the content of the outlet target nitrate nitrogen and the inlet alkalinity.
Compared with the prior art, the invention has the remarkable advantages that: by setting up double preset links, the problem that the sulfur autotrophic denitrification microorganism cannot fully react when the sewage and the medicine materials are mixed at one time is solved; after two times of medicine mixing, the sulfur autotrophic denitrification microorganism is given enough reaction time; meanwhile, a water quality monitor is additionally arranged on the dosing pump to measure the nitrate nitrogen parameter and the nitrate degree parameter in the sewage, so that a proper amount of the transported medicine is ensured, and the measurement requirements in each sewage treatment link are met.
Drawings
FIG. 1 is a schematic view of the structure of a stirred fluidized bed in an embodiment of the present invention.
In the figure: 1. a water inlet pipe; 2. a reaction member, 21, a preset area, 21a, a first preset area, 21b, a second preset area; 22. a fluidization region; 23. a buffer area; 3. a water outlet pipe; 4. a delivery tube; 5. a filler cell; 6. a guide cylinder; r1, a first stirrer, R2, a second stirrer, R3 and a third stirrer; k1, water passing holes, K2 and water draining holes; p10, a first dosing pump, P20 and a second dosing pump; A/C01, a first water quality monitor, A/C02 and a second water quality monitor; m, a motor.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, a fluidized bed for sewage denitration, the fluidized bed comprises a reaction member 2, the reaction member 2 is provided with a preset area 21 and a fluidization area 22, the preset area 21 is provided with a water inlet pipe 1, wherein:
the preset area 21 is internally provided with a filling grid 5 and a first stirrer R1 vertically penetrating through the filling grid 5, and stirring blades of the first stirrer R1 are positioned below the filling grid 5; the packing grid 5 is of a grid-shaped square structure, can be fixedly arranged or detachably arranged in the preset area 21, has grid density of 40mm, has a distance of 120mm between the packing grid 5 and the bottom of the preset area 21, and is preferably braided biological packing;
the fluidization area 22 is internally provided with a guide cylinder 6 and a second stirrer R2 vertically arranged in the guide cylinder 6, the conveying pipe 4 penetrates into the fluidization area 22 to be connected with the bottom of the guide cylinder 6, the opening of the guide cylinder 6 is upward, and the fluidization area 22 is internally provided with particle fillers.
Specifically, the reaction member 2 is further provided with a buffer zone 23, the buffer zone 23 is connected adjacent to the other side wall of the fluidization zone 22, a drain hole K2 is formed in the side wall of the connection between the buffer zone 23 and the fluidization zone 22, and the other side wall of the buffer zone 23 is provided with a water outlet pipe 3.
Specifically, the reaction member 2 is connected with a dosing pump for delivering the charge to the preset zone 21 and/or the fluidization zone 22, wherein:
when the dosing pump conveys the medicine to the preset area 21, the output end of the dosing pump is positioned at the water inlet of the water inlet pipe 1;
when the dosing pump delivers the charge to the fluidization area 22, the output of the dosing pump is located within the guide cylinder 6.
Specifically, the preset area 21 is divided into a first preset area 21a and a second preset area 21b, the first preset area 21a and the second preset area 21b share a filler grid 5, the first preset area 21a and the second preset area 21b are communicated through a water passing hole K1, the water passing hole K1 is located above the Yu Tianliao grid 5 and the output end of the dosing pump is located at the outlet of the water passing hole K1, and the second preset area 21b is communicated with the guide cylinder 6 through a conveying pipe 4.
Specifically, a third stirrer R3 which vertically penetrates through the packing lattice 5 in the same manner as the first stirrer R1 in the first preset area 21a is arranged in the second preset area 21b, and stirring blades of the third stirrer R3 are located below the packing lattice 5, wherein:
the capacity of the first preset area 21a is equal to or greater than the capacity of the second preset area 21 b;
the diameter of the stirring She Shelun of the first stirrer R1 is 0.8 times of the diameter of the first preset area 21a, and the speed of the outer line of the impeller is 4m/s-5m/s, so that the sewage can quickly react and stay for a short time when entering the first preset area 21a, and enters the second preset area 21b after staying for 10s-60 s;
the diameter of the impeller of the third mixer R3 is 0.8 times of the diameter of the second preset area 21b, the speed of the outer line of the impeller is 2m/s-3m/s, compared with the speed of the outer line of the impeller of the first mixer R3 in the first preset area 21a, the residence time of the sewage in the second preset area 21b is prolonged and reaches 30s-180s due to the small capacity of the second preset area 21b and the small speed of the outer line of the impeller, so that secondary reaction can be conveniently carried out on the sewage, and the concentration of sulfur autotrophic denitrification microorganisms in the sewage is improved;
the diameter of the guide cylinder 6 is 0.7 times of the diameter of the fluidization area 22, the diameter of the stirring impeller of the second stirrer R2 is 0.9 times of the diameter of the guide cylinder 6, and the speed of the outer line of the impeller is 0.3m/s-0.5m/s; after the speed of the outer line of the impeller is reduced, the sewage is given enough residence time to complete the nitrification and denitrification, and the residence time is 15-30 min.
In addition, the water passing holes K1 are provided with filler interception nets, and the grid density of the filler interception nets is smaller than that of the filler grids 5, so that the sewage flowing through the fluidization area 22 is fully filtered. The water passing holes K1 and the water discharging holes K2 are not positioned on the same horizontal line.
Specifically, the dosing pump is provided with a water quality monitor for testing the water quality parameters of the sewage flowing through the water inlet pipe 1.
The invention also provides a fluidized treatment method based on the fluidized bed for sewage denitration, which comprises the following steps:
delivering sewage into the preset area 21 through the water inlet pipe 1;
calculating the quantity of first to-be-supplied medicines in the preset area 21, conveying the first to-be-supplied medicines in the preset area 21 into the preset area 21 through a medicine adding pump, starting a first stirrer R1 to stir and mix sewage and the medicines, performing a first reaction between the mixed sewage and braided belt type biological fillers in the preset area 21, and enabling the sewage after the first reaction to flow into a guide cylinder 6 in a fluidization area 22 along a conveying pipe 4;
calculating the quantity of the second medicine to be supplied in the fluidization area 22, conveying the second medicine to be supplied in the fluidization area 22 into the guide cylinder 6 through a medicine adding pump, starting a second stirrer R2 to stir and remix the sewage and the medicine after the first reaction, overflowing the sewage after remixing outwards along the opening of the guide cylinder 6, carrying out the second reaction with the particle filling in the preset area 21, and enabling the sewage after the second reaction to enter the buffer area 23 along the drain hole K2;
and the sewage after the second reaction flows out from the water outlet pipe 3, and the fluidization treatment is finished.
Specifically, the particle filler is preferably a shell filler, the shell filler has high hardness, a special pore structure and multiple pores, and the particle filler has a strong adsorption effect in the use process and can effectively remove suspended solids in sewage.
Specifically, the number of the first to-be-supplied medicines in the preset area 21 is divided into two equal or different ratio components to be respectively conveyed, one first to-be-supplied medicine is conveyed to the preset area 21 and mixed with sewage for a period of time, and the other first to-be-supplied medicine is conveyed to the preset area 21.
Specifically, the quantity of the medicine to be supplied in the preset area 21/the fluidization area 22 is calculated according to the water quality parameters of the sewage, wherein the water quality parameters comprise the inlet nitrate nitrogen content, the inlet alkalinity content and the outlet target nitrate nitrogen content of the sewage; the types of medication to be replenished include electron donors and alkalinity substances, at least one type at a time.
The input amount of the electron donor is determined by the difference between the content of the inflow nitrate nitrogen and the content of the outflow target nitrate nitrogen; the adding amount of the alkalinity substance is determined by the content of the inlet nitrate nitrogen, the content of the outlet target nitrate nitrogen and the inlet alkalinity.
The water quality monitor comprises a first water quality monitor A/C01 and a second water quality monitor A/C02, wherein the first water quality monitor A/C01 is used for detecting the alkalinity content of sewage, and the second water quality monitor A/C02 is used for detecting the nitrate nitrogen content in the sewage. The dosing pump conveys electron donors to the preset area 21 according to the measurement result of the first water quality monitor A/C01, the concentration of sulfur autotrophic denitrification microorganisms in sewage is increased, the dosing pump conveys alkalinity substances to the fluidization area 22 according to the measurement result of the first water quality monitor A/C01, and the pH value reduction of the sewage caused by the consumption of alkalinity in the nitrification and denitrification process is reduced.
Since the number of electron donors is large and it is difficult for the sulfur autotrophic denitrifying microorganisms to sufficiently react when the dosing pumps deliver the electron donors to the preset area 21 at one time, one dosing pump, i.e., the first dosing pump P10 and the second dosing pump P20, is provided corresponding to the first preset area 21a and the second preset area 21b, respectively. According to the measurement result of the first water quality monitor A/C02 at the water inlet of the water inlet pipe 1, calculating the total addition amount of the electron donor, and carrying out batch conveying; first the first dosing pump P10 delivers part of the electron donor to the water outlet of the inlet pipe 1 in the first preset area 21a, and then the first dosing pump P10 delivers the remaining part of the electron donor from the outlet of the water passing hole K1 to the first preset area 21b. According to the measurement result of the second water quality monitor A/C02 at the water inlet of the water inlet pipe 1, the total amount of alkaline substances to be added is calculated, and the second dosing pump P20 is used for conveying the alkaline substances into the guide cylinder 6.
The total addition amount of the electron donor is determined by the difference between the inlet water nitrate nitrogen content and the outlet water target nitrate nitrogen content, and the calculation formula is as follows:
△C=C 1 -C 2
C d =α×△C
wherein: Δc represents the difference between the inlet water nitrate nitrogen content and the outlet water target nitrate nitrogen content; the alpha addition coefficient represents the amount of electron donor to be added when 1mg of nitrate nitrogen is removed, and the value is generally 2.5-3.5; c (C) 1 Represents the nitrate nitrogen content (unit: mg/L) of the inlet water; c (C) 2 The target nitrate nitrogen content (unit: mg/L) of water is shown; c (C) d Indicating the total amount of electron donor added.
The electron donor was added in two portions with the aim of: the sulfur autotrophic denitrifying microorganisms are placed in a "starved state", and when the first electron donor is transported, the sulfur autotrophic denitrifying microorganisms start to grow and maintain a certain growth speed until the second electron donor is transported and then continue to grow, and fully react within a specified residence time. If all the electron donors are added at one time, the sulfur autotrophic denitrification microorganisms are in a saturated state when sewage is mixed, and the electron donors have a part of unconsumed allowance, so that the autotrophic denitrification bacteria are differentiated to generate milky solids which are discharged from the water outlet pipe 3 along with the sewage.
The adding amount of the alkalinity substance is determined by the inlet water nitrate nitrogen content, the outlet water target nitrate nitrogen content and the inlet water alkalinity, and the calculation formula is as follows:
C j =2+3.57×（C 1 -C 2 ）-C 3
wherein: c (C) j Represents the addition amount of alkalinity (unit: mg/L), C 3 Represents the alkalinity of the inlet water (unit: mg/L).
The purpose of adding the alkalinity substance into the guide cylinder 6 is to supplement the alkalinity consumed by autotrophic denitrification microorganisms, avoid the pH of the effluent from being too low, maintain the bioactivity, further consume an electron donor for denitrification, and ensure that the nitrate nitrogen concentration of the effluent reaches the standard.
In particular, the electron donor is preferably sulfur powder, and the alkalinity substance is preferably slaked lime.
The following describes the operation process of the sewage treatment method in detail in connection with the specific application scenario of the fluidized bed.
Example 1: the engineering application design scale is 60000m and/d, and the sewage residence time is designed to be 20min. Wherein, the COD concentration of the inflow water (Chemical Oxygen Demand, which indicates the amount of the oxidant consumed when a certain strong oxidant is adopted to treat the water sample under a certain condition) is 25 mg/L-35 mg/L; the requirements are: TN (total nitrogen, which represents total nitrogen content in sewage treatment, refers to total amount of ammonia nitrogen, nitrite nitrogen, nitrate nitrogen and nitrogen in organic matters in water body) is controlled below 10mg/L, and COD concentration of effluent is controlled below 30 mg/L.
The methanol and sulfur powder electron donors are selected for experiments, and the concentration of the nitrate nitrogen after the reaction is compared with the concentration of the nitrate nitrogen under different addition amounts, so that the method provided by the invention has the effects of realizing stable biological concentration and improving the reaction rate of sewage treatment. See table 1 for details:
| electron donor | Addition amount (mg/L) | COD of water inflow (mg/L) | Effluent COD (mg/L) | Total nitrogen in water (mg/L) | Total nitrogen in effluent (mg/L) |
| Sulfur powder | 13 | 25～35 | 20～30 | 12～15 | 6～10 |
| Methanol | 13 | 25～35 | 23～32 | 12～15 | 6～10 |
The data in table 1 shows that: under the condition that the adding amount, the inflow COD and the inflow total nitrogen value of the two electron donors are the same, the outflow total nitrogen of the two electron donors is the same after the operation of the method and accords with the engineering requirement TN to be controlled below 10mg/L, but the outflow COD concentration of the electron donor of the methanol type is higher than the outflow COD concentration of the electron donor of the sulfur type, the electron donor does not accord with the engineering requirement that the outflow COD concentration is controlled below 30mg/L, and the outflow COD concentration of the electron donor of the sulfur type is between 20mg/L and 30mg/L, so as to accord with the engineering requirement; thus, electron donors of the sulfur powder variety are preferred.
The dosing pump and the stirrer mentioned in the embodiment are conventional products, the dosing pump mainly comprises a motor, a transmission case, a cylinder body and the like, and the stirrer mainly comprises a motor, a frame, a coupling, a stirring shaft, an impeller and the like. The motor is involved in both conventional products, and the product is driven to run by the motor, so that the use function of the motor in the embodiment of the invention is not repeated.
The dosing pump and the stirrer mentioned in the embodiment are conventional products, the dosing pump mainly comprises a motor, a transmission case, a cylinder body and the like, and the stirrer mainly comprises a motor, a frame, a coupling, a stirring shaft, an impeller and the like. The motor is involved in both conventional products, and the product is driven to run by the motor, so that the use function of the motor in the embodiment of the invention is not repeated.
Claims (10)
1. A fluidized bed for sewage denitration is characterized in that: comprises a reaction member (2), wherein the reaction member (2) comprises a preset area (21) and a fluidization area (22), and the preset area (21) is provided with a water inlet pipe (1); wherein:
a filling grid (5) and a first stirrer (R1) vertically penetrating through the filling grid (5) are arranged in the preset area (21), stirring blades of the first stirrer (R1) are positioned below the filling grid (5), and a braid type biological filler is arranged in the filling grid (5);
the fluidization area (22) is internally provided with particle fillers, a guide cylinder (6) and a second stirrer (R2) vertically arranged in the guide cylinder (6), the preset area (21) is communicated with the guide cylinder (6) through a conveying pipe (4), and the opening of the guide cylinder (6) is upward.
2. A fluidized bed for sewage denitration according to claim 1, characterized in that: the reaction member (2) is further provided with a buffer zone (23), the buffer zone (23) is communicated with the fluidization zone (22) through a drain hole (K2), the fluidization zone (22) is provided with the drain hole (K2), and the buffer zone (23) is provided with a water outlet pipe (3).
3. A fluidized bed for sewage denitration according to claim 2, characterized in that: the reaction member (2) is connected with a dosing pump for delivering a drug to the preset zone (21) and/or the fluidization zone (22).
4. A fluidized bed for sewage denitration according to claim 3, wherein: when the dosing pump conveys the medicine to the preset area (21), the output end of the dosing pump is positioned at the water inlet of the water inlet pipe (1).
5. A fluidized bed for sewage denitration according to claim 3, wherein: when the dosing pump delivers the charge to the fluidization area (22), the output end of the dosing pump is located in the guide cylinder (6).
6. A fluidized bed for sewage denitration according to claim 3, wherein: dividing the preset area (21) into a first preset area (21 a) and a second preset area (21 b), wherein the first preset area (21 a) is communicated with the second preset area (21 b) through a water passing hole (K1), and the output end of the dosing pump is positioned at the outlet of the water passing hole (K1); the second preset area (21 b) is communicated with the guide cylinder (6) through a conveying pipe (4); and a third stirrer (R3) vertically penetrating through the filling grid (5) is arranged in the second preset area (21 b), and stirring blades of the third stirrer (R3) are positioned below the filling grid (5).
7. The fluidized bed for sewage denitration according to claim 6, wherein: the dosing pump is provided with a water quality monitor which is used for detecting the water quality parameters of sewage flowing through the water inlet pipe (1).
8. A fluidization treatment method based on the fluidized bed for denitration of sewage as set forth in any one of claims 3 to 7, characterized in that: the method comprises the following steps:
sewage is conveyed into a preset area (21) through the water inlet pipe (1);
calculating the quantity of first to-be-supplied medicines in a preset area (21), conveying the first to-be-supplied medicines in the preset area (21) into the preset area (21) through the medicine adding pump, starting the first stirrer (R1) to stir and mix sewage and the medicines, and performing a first reaction on the mixed sewage and braided belt type biological fillers in the preset area (21), wherein the sewage after the first reaction flows into the guide cylinder (6) in the fluidization area (22) along the conveying pipe (4);
calculating the quantity of second medicine to be supplied in the fluidization area (22), conveying the second medicine to be supplied in the fluidization area (22) into the guide cylinder (6) through the medicine adding pump, starting the second stirrer (R2) to stir and remix the sewage and medicine after the first reaction, and enabling the sewage after remixing to overflow outwards along the opening of the guide cylinder (6), and enabling the sewage after the second reaction to enter the buffer area (23) along the drain hole (K2) after the second reaction with the particle filler in the preset area (21);
and (3) the sewage after the second reaction flows out from the water outlet pipe (3), and the fluidization treatment is finished.
9. The fluidized treatment method based on the fluidized bed for sewage denitration according to claim 8, wherein: dividing the quantity of the first to-be-supplied medicines in the preset area (21) into two parts with the same or different proportion components for respectively conveying, firstly conveying one part of the first to-be-supplied medicines to the preset area (21) and mixing with sewage for a period of time, and then conveying the other part of the first to-be-supplied medicines to the preset area (21).
10. The fluidized treatment method based on the fluidized bed for sewage denitration according to claim 9, wherein: the quantity of the medicine to be supplied in the preset area (21)/the fluidization area (22) is calculated according to water quality parameters of the sewage, wherein the water quality parameters comprise the inlet nitrate nitrogen content, the inlet alkalinity content and the outlet target nitrate nitrogen content of the sewage, the type of the medicine to be supplied comprises an electron donor and an alkalinity substance, and at least one type is put in each time; wherein:
the input amount of the electron donor is determined by the difference between the inlet water nitrate nitrogen content and the outlet water target nitrate nitrogen content;
the adding amount of the alkalinity substance is determined by the content of the inlet nitrate nitrogen, the content of the outlet target nitrate nitrogen and the inlet alkalinity.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104528932A (en) * | 2014-12-26 | 2015-04-22 | 上海中信水务产业有限公司 | Advanced wastewater treatment denitrification biological filter device system and treatment process |
| CN107162184A (en) * | 2017-06-07 | 2017-09-15 | 南京大学 | A kind of utilization Anammox sulphur autotrophic denitrification couples the UBF reactors and its system and denitrogenation method of denitrogenation |
| CN109179647A (en) * | 2018-09-17 | 2019-01-11 | 清华大学 | A kind of sulphur autotrophic denitrification denitrogenation thermopnore |
| CN209872528U (en) * | 2019-03-22 | 2019-12-31 | 湖北瀚能环保工程有限公司 | Two-stage series porous filler denitrification deep bed filter system |
| CN217127049U (en) * | 2022-03-25 | 2022-08-05 | 中电环保股份有限公司 | UAD bioreactor based on sulfur autotrophy |
| CN219279631U (en) * | 2023-04-18 | 2023-06-30 | 湖北瀚能环保工程有限公司 | Denitrification and denitrification system combining fluidized bed and denitrification deep bed filter |
| CN116621339A (en) * | 2023-07-26 | 2023-08-22 | 湖南三友环保科技有限公司 | Fine control denitrification control method and control device for sewage processor |
-
2023
- 2023-09-25 CN CN202311238460.3A patent/CN117003385B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104528932A (en) * | 2014-12-26 | 2015-04-22 | 上海中信水务产业有限公司 | Advanced wastewater treatment denitrification biological filter device system and treatment process |
| CN107162184A (en) * | 2017-06-07 | 2017-09-15 | 南京大学 | A kind of utilization Anammox sulphur autotrophic denitrification couples the UBF reactors and its system and denitrogenation method of denitrogenation |
| CN109179647A (en) * | 2018-09-17 | 2019-01-11 | 清华大学 | A kind of sulphur autotrophic denitrification denitrogenation thermopnore |
| CN209872528U (en) * | 2019-03-22 | 2019-12-31 | 湖北瀚能环保工程有限公司 | Two-stage series porous filler denitrification deep bed filter system |
| CN217127049U (en) * | 2022-03-25 | 2022-08-05 | 中电环保股份有限公司 | UAD bioreactor based on sulfur autotrophy |
| CN219279631U (en) * | 2023-04-18 | 2023-06-30 | 湖北瀚能环保工程有限公司 | Denitrification and denitrification system combining fluidized bed and denitrification deep bed filter |
| CN116621339A (en) * | 2023-07-26 | 2023-08-22 | 湖南三友环保科技有限公司 | Fine control denitrification control method and control device for sewage processor |
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