CN112093983A - Sewage treatment device and sewage treatment method - Google Patents
Sewage treatment device and sewage treatment method Download PDFInfo
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- CN112093983A CN112093983A CN202010960234.6A CN202010960234A CN112093983A CN 112093983 A CN112093983 A CN 112093983A CN 202010960234 A CN202010960234 A CN 202010960234A CN 112093983 A CN112093983 A CN 112093983A
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- 239000010865 sewage Substances 0.000 title claims abstract description 122
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005192 partition Methods 0.000 claims abstract description 87
- 238000004062 sedimentation Methods 0.000 claims abstract description 75
- 239000012535 impurity Substances 0.000 claims abstract description 69
- 238000000855 fermentation Methods 0.000 claims abstract description 62
- 230000004151 fermentation Effects 0.000 claims abstract description 62
- 239000002245 particle Substances 0.000 claims abstract description 47
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 40
- 238000012216 screening Methods 0.000 claims abstract description 39
- 230000000903 blocking effect Effects 0.000 claims abstract description 12
- 238000005273 aeration Methods 0.000 claims description 27
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 26
- 239000001301 oxygen Substances 0.000 claims description 26
- 229910052760 oxygen Inorganic materials 0.000 claims description 26
- 238000003756 stirring Methods 0.000 claims description 14
- 238000005276 aerator Methods 0.000 claims description 9
- 238000012546 transfer Methods 0.000 claims description 6
- 239000002351 wastewater Substances 0.000 claims description 4
- 230000000717 retained effect Effects 0.000 claims description 3
- 238000004065 wastewater treatment Methods 0.000 claims 2
- 238000004891 communication Methods 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 10
- 229910052799 carbon Inorganic materials 0.000 abstract description 10
- 230000001502 supplementing effect Effects 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 27
- 239000000047 product Substances 0.000 description 8
- 238000007873 sieving Methods 0.000 description 8
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 7
- 239000003344 environmental pollutant Substances 0.000 description 7
- 231100000719 pollutant Toxicity 0.000 description 7
- 230000015271 coagulation Effects 0.000 description 4
- 238000005345 coagulation Methods 0.000 description 4
- 230000000813 microbial effect Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000013589 supplement Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000249 desinfective effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
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- 229910052757 nitrogen Inorganic materials 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
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
-
- 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
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
-
- 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
- C02F2209/14—NH3-N
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/046—Recirculation with an external loop
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
-
- 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
Abstract
The invention relates to the technical field of sewage treatment, in particular to a sewage treatment device. The sewage treatment device comprises a primary sedimentation tank, a screening tank, an anaerobic tank, an anoxic tank, an aerobic tank, a secondary sedimentation tank and a disinfection tank which are communicated in sequence; a first partition plate is arranged between the primary sedimentation tank and the screening tank, a first grid for blocking large-particle impurities is arranged at the top of the first partition plate, a second partition plate is arranged between the screening tank and the anaerobic tank, a second grid for blocking medium-particle impurities is arranged at the top of the second partition plate, and the grid-bar spacing of the first grid is larger than that of the second grid; the screening tank is communicated with the fermentation tank through a conveying pump, so that the medium particle impurities blocked in the screening tank can be conveyed into the fermentation tank for fermentation; the fermentation tank is communicated with the anoxic tank through a delivery pump so that the fermentation product can be delivered to the anoxic tank. The invention aims to provide a sewage treatment device capable of supplementing a carbon source to an anoxic pond. The invention also provides a sewage treatment method.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a sewage treatment device and a sewage treatment method.
Background
Impurities in sewage can be classified into three grades according to particle size, namely large particle impurities (the particle size is larger than 100 micrometers), medium particle impurities (the particle size is between 40 micrometers and 100 micrometers, and the numerical range includes an end value) and small particle impurities (the particle size is smaller than 40 micrometers), wherein the medium particle impurities are usually refractory organic matters.
In the sewage treatment process, in order to accelerate the sewage treatment progress and prevent the blockage of the sewage flow through holes, large granular impurities and medium granular impurities are usually precipitated in a primary sedimentation tank. This precipitation treatment results in relatively low carbon source content in the wastewater containing only small particulate impurities, so that the removal efficiency of ammonia-nitrogen contaminants in the wastewater is low in the subsequent anoxic reaction. Therefore, the carbon source must be supplemented to the sewage in the anoxic reaction to improve the removal efficiency of the ammonia nitrogen pollutants in the sewage.
Disclosure of Invention
The invention aims to provide a sewage treatment device and a sewage treatment method which can supplement carbon sources to an anoxic pond.
The sewage treatment device comprises a primary sedimentation tank, a screening tank, an anaerobic tank, an anoxic tank, an aerobic tank, a secondary sedimentation tank and a disinfection tank which are communicated in sequence; a first partition plate is arranged between the primary sedimentation tank and the screening tank, a first grid for blocking large-particle impurities is arranged at the top of the first partition plate, a second partition plate is arranged between the screening tank and the anaerobic tank, a second grid for blocking medium-particle impurities is arranged at the top of the second partition plate, and the grid-bar spacing of the first grid is larger than that of the second grid; the screening tank is communicated with the fermentation tank through a conveying pump, so that the medium particle impurities blocked in the screening tank can be conveyed into the fermentation tank for fermentation; the fermentation tank is communicated with the anoxic tank through a delivery pump so that the fermentation product can be delivered to the anoxic tank.
Preferably, a motor cabin and a fermentation cabin are arranged in the fermentation tank, and the fermentation cabin is respectively communicated with the screening pool and the anoxic pool; the motor cabin and the fermentation cabin are separated by a partition plate, a stirring motor is arranged in the motor cabin, a stirring paddle is arranged in the fermentation cabin, and one end of the stirring paddle penetrates through the partition plate and is connected with a rotating shaft of the stirring motor.
Preferably, a third partition plate is arranged between the anaerobic tank and the anoxic tank, and a sewage circulating hole is formed in the bottom of the third partition plate.
Preferably, a fourth partition plate is arranged between the aerobic tank and the anoxic tank, and a sewage flow through hole is formed in the top of the fourth partition plate; a fifth partition plate is arranged between the aerobic tank and the secondary sedimentation tank, and a sewage flow through hole is formed in the top of the fifth partition plate; a first baffle is arranged between the fourth baffle and the fifth baffle, a first slope plate which inclines towards the secondary sedimentation tank is arranged between the fifth baffle and the bottom wall of the aerobic tank, and a sewage circulation hole is arranged between the first baffle and the first slope plate.
Preferably, the number of the aerobic tanks is two or more, and all the aerobic tanks are communicated in sequence.
Preferably, a fifth partition plate is arranged between the secondary sedimentation tank and the aerobic tank, and a sewage flow through hole is formed in the top of the fifth partition plate; a sixth clapboard is arranged between the secondary sedimentation tank and the disinfection tank, and the top of the sixth clapboard is provided with a sewage circulating hole; a second baffle is arranged at the top of the secondary sedimentation tank and is positioned between the fifth partition plate and the sixth partition plate; a second slope plate which inclines towards the aerobic tank is arranged between the fifth partition plate and the bottom wall of the secondary sedimentation tank, and a third slope plate which inclines towards the disinfection tank is arranged between the sixth partition plate and the bottom wall of the secondary sedimentation tank.
Preferably, a honeycomb inclined tube is arranged between the second baffle and the fifth baffle, and all inclined tubes of the honeycomb inclined tube incline towards the disinfection tank; a third baffle is arranged on the bottom wall of the secondary sedimentation tank, the third baffle is positioned between the second slope plate and the third slope plate, and a vertical interval is formed between the second baffle and the third baffle; the third baffle is closer to the second baffle than the sixth baffle.
Preferably, a sixth partition plate is arranged between the disinfection tank and the secondary sedimentation tank, a sewage flow through hole is formed in the top of the sixth partition plate, a seventh partition plate opposite to the sixth partition plate is arranged in the disinfection tank, and a sewage flow through hole is formed in the top of the seventh partition plate; a fourth baffle is arranged between the sixth baffle and the seventh baffle, and a space is arranged between the bottom wall of the disinfection tank and the fourth baffle.
Preferably, the device also comprises a device chamber, wherein an aeration fan and an aeration controller are arranged in the device chamber, and the aeration fan is communicated with the aerobic tank through a vent pipe so as to supply oxygen to the aerobic tank; the aeration controller is used for controlling the aeration fan to supply oxygen to the aerobic tank; the part of the aeration pipe positioned in the aerobic tank is provided with an aerator; the aerobic tank is also provided with an oxygen dissolving instrument for monitoring the dissolved oxygen amount of the sewage in the aerobic tank, and the oxygen dissolving instrument is connected with the aeration controller.
The sewage treatment method comprises the following steps: the sewage in the primary sedimentation tank flows into the screening tank, and the large-particle impurities in the primary sedimentation tank are blocked in the primary sedimentation tank by a first grid for blocking the large-particle impurities; sewage in the screening tank flows into the anaerobic tank, and medium particle impurities in the screening tank are blocked in the screening tank by a second grid for blocking the medium particle impurities, wherein the grid spacing of the first grid is larger than that of the second grid; sewage in the anaerobic tank flows into the anoxic tank, the aerobic tank, the secondary sedimentation tank and the disinfection tank in sequence for corresponding treatment; the medium particle impurities retained in the screening tank are transferred to a fermentation tank for fermentation, and the fermentation product is transferred to an anoxic tank for treatment.
Compared with the prior art, the technical scheme provided by the embodiment of the invention has the following advantages:
the sewage treatment device disclosed by the invention screens impurities in the sewage through the first grid and the second grid, independently ferments the screened impurities with medium particle size, and supplements the fermentation product as a carbon source to the anoxic tank so as to improve the removal efficiency of ammonia nitrogen pollutants in the sewage.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a schematic view of a sewage treatment apparatus according to an embodiment of the present invention.
Wherein, 1, a primary sedimentation tank; 2. a screening tank; 3. an anaerobic tank; 4. an anoxic tank; 5. an aerobic tank; 6. a secondary sedimentation tank; 7. a disinfection tank; 8. a first separator; 9. a first grid; 10. a second separator; 11. a second grid; 12. a fermentation tank; 13. a delivery pump; 14. a motor compartment; 15. a fermentation chamber; 16. a third partition plate; 17. a fourth separator; 18. a fifth partition plate; 19. a first baffle plate; 20. a first ramp plate; 21. an aerobic reaction zone; 22. a water outlet area; 23. a sixth partition plate; 24. a second baffle; 25. a second ramp plate; 26. a third ramp plate; 27. a buffer area; 28. a coagulation zone; 29. a honeycomb inclined pipe; 30. a third baffle plate; 31. a seventh partition plate; 32. a fourth baffle; 33. a sterile area; 34. a blowdown area; 35. an equipment room; 36. an aeration fan; 37. an aeration controller; 38. an oxygen dissolving instrument; 39. an aerator.
Detailed Description
In order that the above objects, features and advantages of the present invention may be more clearly understood, a solution of the present invention will be further described below. It should be noted that the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those described herein; it is to be understood that the embodiments described in this specification are only some embodiments of the invention, and not all embodiments.
As shown in figure 1, the invention provides a sewage treatment device, which comprises a primary sedimentation tank 1, a screening tank 2, an anaerobic tank 3, an anoxic tank 4, an aerobic tank 5, a secondary sedimentation tank 6 and a disinfection tank 7 which are communicated in sequence. Be equipped with first baffle 8 between preliminary sedimentation pond 1 and the screening pond 2, the top of first baffle 8 is equipped with the first grid 9 that is used for blockking large granule impurity, is equipped with second baffle 10 between screening pond 2 and the anaerobism pond 3, and the top of second baffle 10 is equipped with the second grid 11 that is used for blockking medium granule impurity, and the grid interval of first grid 9 is greater than the grid interval of second grid 11. The sieving tank 2 is communicated with the fermentation tank 12 by a transfer pump 13 so that the medium particle impurities blocked in the sieving tank 2 can be transferred to the fermentation tank 12 for fermentation. The fermentation tank 12 is communicated with the anoxic tank 4 by a transfer pump 13 so that the fermentation product can be transferred to the anoxic tank 4.
In the present embodiment, the first grid 9 and the second grid 11 may be used to block foreign particles of different particle sizes, respectively. Specifically, when the sewage in the primary sedimentation tank 1 flows into the sieving tank 2, large-sized impurities in the sewage are blocked by the first grating 9, and the large-sized impurities are precipitated in the primary sedimentation tank 1 and discharged. When the sewage in the sieving tank 2 flows into the anaerobic tank 3, the medium particle impurities are blocked by the second grating 11 and the medium particle impurities are precipitated in the sieving tank 2. Further, the medium granular impurities in the sieving tank 2 can be pumped into the fermentation tank 12 by the transfer pump 13, the microbial population in the fermentation tank 12 can ferment the medium granular impurities, and the fermentation product (such as fermentation liquor) can be pumped into the anoxic tank 4 by the transfer pump 13 as a supplementary carbon source to participate in an anoxic reaction in the anoxic tank 4, so as to improve the removal efficiency of the ammonia nitrogen pollutants in the sewage. Therefore, the sewage treatment device screens impurities in the sewage through the first grid 9 and the second grid 11, independently ferments the screened impurities with medium particle size, and supplements the fermentation product as a carbon source to the anoxic tank 4 so as to improve the removal efficiency of ammonia nitrogen pollutants in the sewage.
In this embodiment, sewage in the screening tank 2 enters the anaerobic tank 3 to perform anaerobic reaction, sewage in the anaerobic tank 3 enters the anoxic tank 4 to perform anoxic reaction, sewage in the anoxic tank 4 enters the aerobic tank 5 to perform aerobic reaction, sewage in the aerobic tank 5 enters the secondary sedimentation tank 6 to perform sedimentation again, and sewage in the secondary sedimentation tank 6 enters the disinfection tank 7 to perform disinfection treatment, so as to reach the sewage discharge standard. Certainly, the primary sedimentation tank 1, the anaerobic tank 3, the anoxic tank 4, the aerobic tank 5, the secondary sedimentation tank 6 and the disinfection tank 7 can be conventional sewage treatment tanks in the field, and the details are not repeated in this embodiment. In addition, the radial flow sedimentation tank is preferably selected as the primary sedimentation tank 1, the device is simple, and the occupied area is small.
In the present embodiment, the first grid 9 and the second grid 11 are both conventional grids in the art, as long as they cooperate to retain medium particle impurities in the screening tank 2. In addition, those skilled in the art will appreciate that the fermenting microbial population in the fermentor 12 is a more fermentative microbial population, and thus the refractory organics can be sufficiently fermented to allow rapid fermentation of medium particle impurities and rapid carbon source supplementation to the anoxic tank.
In a preferred embodiment, the bottom of the sieving tank 2 is connected to the top of the fermentation tank 12 through a sewer pipe, and a solenoid valve or other manual valve is installed on the sewer pipe to prevent the sewage and the medium particle impurities in the sieving tank 2 from being excessively transferred to the fermentation tank 12; the bottom of the fermentation tank 12 is communicated with the bottom of the anoxic zone through a sewage pipe, which is also provided with an electromagnetic valve or other manual valves to prevent impurities and sewage in the anoxic tank 4 from flowing back into the fermentation tank 12. Of course, the two transfer pumps 13 are connected to the two sewage pipes to pump the target substance.
In some embodiments, a motor compartment 14 and a fermentation compartment 15 are arranged in the fermentation tank 12, the motor compartment 14 and the fermentation compartment 15 are separated by a partition plate, and the fermentation compartment 15 is respectively communicated with the screening tank 2 and the anoxic tank 4. A stirring motor is arranged in the motor cabin 14, a stirring paddle is arranged in the fermentation cabin 15, and one end of the stirring paddle penetrates through the partition plate and is connected with a rotating shaft of the stirring motor.
In this embodiment, when the medium particle impurities enter the fermentation chamber 15, the stirring paddle can slowly stir the medium particle impurities under the driving of the stirring motor, so that the impurities are fully mixed with the microbial flora, thereby promoting the rapid fermentation and decomposition of the impurities in the fermentation chamber 15. In addition, a sealing ring is arranged between the stirring paddle and the partition plate to prevent sewage from entering the motor cabin 14.
In some embodiments, a third partition 16 is arranged between the anaerobic tank 3 and the anoxic tank 4, and the bottom of the third partition 16 is provided with a sewage flow hole.
In this embodiment, the sewage that has completed the anaerobic reaction in the anaerobic tank 3 can enter the anoxic tank 4 through the sewage flow hole to perform the anoxic reaction. And the fermentation product in the fermentation tank 12 is delivered to the anoxic tank 4 as a supplementary carbon source to participate in the reaction, thereby enhancing the removal efficiency of the ammonia nitrogen pollutants in the sewage. It should be noted that the contaminant impurities participating in the reaction in the anaerobic tank 3 include small particle impurities, for example, impurities having a particle size ranging from 5 to 40 micrometers (inclusive).
In some embodiments, a fourth partition 17 is provided between the aerobic tank 5 and the anoxic tank 4, and a sewage flow through hole is provided at the top of the fourth partition 17. A fifth clapboard 18 is arranged between the aerobic tank 5 and the secondary sedimentation tank 6, and the top of the fifth clapboard 18 is provided with a sewage circulating hole. A first baffle plate 19 is arranged between the fourth partition plate 17 and the fifth partition plate 18, a first slope plate 20 inclined towards the secondary sedimentation tank 6 is arranged between the fifth partition plate 18 and the bottom wall of the aerobic tank 5, and a sewage flow through hole is arranged between the first baffle plate 19 and the first slope plate 20.
In this embodiment, the aerobic tank 5 is divided into two parts, i.e., an aerobic reaction zone 21 and a water outlet zone 22, by the first baffle plate 19. The sewage subjected to the anoxic reaction in the anoxic tank 4 can enter the aerobic reaction zone 21 of the aerobic tank 5 through the sewage flow through hole at the top of the fourth partition 17. The aerobic reaction zone 21 serves as a main zone, and aerobic reaction is mainly carried out in the aerobic reaction zone 21. The sewage in the aerobic reaction zone 21 can enter the water outlet zone 22 through the sewage through hole below the fifth partition plate 18, and the sewage in the water outlet zone 22 further enters the secondary sedimentation tank 6 through the sewage through hole at the top of the fifth partition plate 18. In addition, since the oxygen content of the effluent zone 22 is relatively low (the aeration device is disposed in the aerobic reaction zone 21, and the following embodiment will be described in detail), the effluent zone 22 is locally in an anoxic state, and in the slightly anoxic state, the nitrification reaction can be performed to remove nitrogen, thereby further improving the removal efficiency of ammonia-nitrogen pollutants in the sewage.
In this embodiment, the first slope plate 20 is inclined towards the secondary sedimentation tank 6, and even if impurities are deposited below the first baffle plate 19, the impurities slide downwards along the first slope plate 20 under the action of self weight, so that the impurities cannot be accumulated below the first baffle plate 19 to cause blockage.
5. In some embodiments, the number of the aerobic tanks 5 is two or more, and all the aerobic tanks 5 are communicated in sequence.
In this embodiment, the anoxic zone is communicated with the aerobic reaction zone 21 of the first aerobic tank 5, the effluent zone 22 of the first aerobic tank 5 is communicated with the aerobic reaction zone 21 of the second aerobic tank 5, the effluent zone 22 of the second aerobic tank 5 is communicated with the aerobic reaction zone 21 of the third aerobic tank 5, and the effluent zone 22 of the third aerobic tank 5 is communicated with the secondary sedimentation tank 6. A plurality of aerobic tanks 5 which are communicated in sequence are arranged between the anoxic tank 4 and the secondary sedimentation tank 6, so that the sewage can stay in each aerobic tank 5 in sequence and carry out aerobic reaction, and pollutants in the sewage can be fully decomposed.
In some embodiments, a fifth partition plate 18 is arranged between the secondary sedimentation tank 6 and the aerobic tank 5, and the top of the fifth partition plate 18 is provided with a sewage flowing hole. A sixth clapboard 23 is arranged between the secondary sedimentation tank 6 and the disinfection tank 7, and the top of the sixth clapboard 23 is provided with a sewage through hole. The top of the secondary sedimentation tank 6 is provided with a second baffle plate 24, and the second baffle plate 24 is positioned between the fifth partition plate 18 and the sixth partition plate 23. A second slope plate 25 which inclines towards the aerobic tank 5 is arranged between the fifth partition plate 18 and the bottom wall of the secondary sedimentation tank 6, and a third slope plate 26 which inclines towards the disinfection tank 7 is arranged between the sixth partition plate 23 and the bottom wall of the secondary sedimentation tank 6.
In the present embodiment, the secondary sedimentation tank 6 is divided into two parts by the second baffle 24, namely a buffer zone 27 and a coagulation zone 28; and the second baffle plate 24 is spaced from the bottom wall of the secondary sedimentation tank 6. Specifically, the sewage in the aerobic tank 5 firstly enters the buffer zone 27 through the sewage flow through hole at the top of the fifth partition plate 18, then enters the coagulation zone 28 from the buffer zone 27, and then enters the disinfection tank 7 from the coagulation zone 28 through the sewage flow through hole at the top of the sixth partition plate 23.
In this embodiment, the second slope plate 25 and the third slope plate 26 are inclined, so that impurities in the sewage can gradually slide down along the second slope plate 25 and the third slope plate 26 and gather together, and are more conveniently discharged in a concentrated manner (the impurities in the sewage in the secondary sedimentation tank 6 are relatively less, so that the impurities need to be gathered firstly). Of course, in other words, the width of the lower portion of the secondary sedimentation tank 6 is gradually reduced to facilitate the accumulation of impurities in the sewage.
In some embodiments, a honeycomb chute 29 is provided between the second baffle 24 and the fifth baffle 18, and all of the chutes of the honeycomb chute 29 are inclined toward the disinfection tank 7. And a third baffle 30 is arranged on the bottom wall of the secondary sedimentation tank 6, the third baffle 30 is positioned between the second slope plate 25 and the third slope plate 26, and a vertical interval is arranged between the second baffle 24 and the third baffle 30. The third baffle 30 is closer to the second baffle 24 than the sixth baffle 23.
In this embodiment, the sewage in the aerobic tank 5 enters the buffer zone 27 through the sewage flow through hole at the top of the fifth partition plate 18, and impurities in the sewage can settle down along the buffer zone 27 and settle at a position between the third partition plate 30 and the second slope plate 25; cleaner sewage can then flow through the area between the second baffle 24 and the third baffle 30 and the impurities that have not settled down can settle down further by the effect of the honeycomb chute 29. Since the ramps of the honeycomb ramps 29 are inclined towards the disinfection tank 7, impurities that have precipitated under the influence of the honeycomb ramps 29 can precipitate towards the second ramp 25, i.e. further in a position between the third baffle 30 and the second ramp 25. The impurities are mostly precipitated at a position between the third baffle 30 and the second slope plate 25 by the dual action of the third baffle 30 and the honeycomb chute 29, so that the impurities in the sedimentation tank are more accumulated and easily discharged.
In some embodiments, a sixth partition 23 is disposed between the disinfection tank 7 and the secondary sedimentation tank 6, a sewage flow through hole is disposed at the top of the sixth partition 23, a seventh partition 31 is disposed opposite to the sixth partition 23 in the disinfection tank 7, and a sewage flow through hole is disposed at the top of the seventh partition 31; a fourth baffle 32 is arranged between the sixth partition plate 23 and the seventh partition plate 31, and a space is arranged between the bottom wall of the disinfection tank 7 and the fourth baffle 32.
In this embodiment, the fourth baffle 32 divides the disinfection tank 7 into a disinfection zone 33 and a sewage zone 34, the disinfection zone 33 being the main area where the disinfection process is performed. Specifically, the sewage in the secondary sedimentation tank 6 enters the disinfection zone 33 through the sewage through hole at the top of the sixth partition plate 23, the sewage in the disinfection zone 33 enters the sewage discharge zone 34 again, and the sewage in the sewage discharge zone 34 is discharged from the sewage through hole at the top of the seventh partition plate 31. Preferably, the sterilization zone 33 may be sterilized by ultraviolet light sterilization. Of course, the ultraviolet disinfection technology is the prior art, and the description of the embodiment is omitted.
In some embodiments, the device further comprises a device chamber 35, an aeration fan 36 and an aeration controller 37 are arranged in the device chamber 35, and the aeration fan 36 is communicated with the aerobic tank 5 through a vent pipe to supply oxygen to the aerobic tank 5; the aeration controller 37 is used for controlling the aeration fan 36 to supply oxygen to the aerobic tank 5; the part of the aeration pipe in the aerobic tank 5 is provided with an aerator 39; the aerobic tank 5 is also provided with an oxygen dissolving instrument 38 to monitor the dissolved oxygen amount of the sewage in the aerobic tank 5, and the oxygen dissolving instrument 38 is connected with the aeration controller 37.
In this embodiment, the dissolved oxygen meter 38 in each aerobic tank 5 can monitor the oxygen content of the sewage in the aerobic tank 5, and then the dissolved oxygen meter 38 sends the oxygen content data to the aeration controller 37, and the aerator 39 controller controls the aeration fan 36 to deliver oxygen to each aerobic tank 5 through the air supply pipe. More specifically, the gas supply pipe supplies oxygen to each aerobic tank 5 through a plurality of gas supply pipe branches. A plurality of aerators 39 are installed on the air supply pipe branch, and the aerators 39 can supply oxygen to the sewage in the aerobic tank 5 for the use of microorganisms. In addition, each air supply pipe branch can be provided with an electromagnetic valve, and the electromagnetic valve is connected with the aerator 39 controller. The aerator 39 controller may open the corresponding solenoid valve and control the aeration fan 36 to supply the corresponding amount of oxygen for the different oxygen contents required for each aerobic tank 5.
The invention also provides a sewage treatment method, which comprises the following steps:
step one, sewage in the primary sedimentation tank 1 flows into the screening tank 2, large-particle impurities in the primary sedimentation tank 1 are blocked in the primary sedimentation tank 1 by the first grating 9 for blocking the large-particle impurities, and the large-particle impurities are discharged from the primary sedimentation tank 1.
Step two, the sewage in the screening tank 2 flows into the anaerobic tank 3 (anaerobic reaction is carried out), and the medium particle impurities in the screening tank 2 are blocked in the screening tank 2 by a second grid 11 for blocking the medium particle impurities, wherein the grid spacing of the first grid 9 is larger than the grid spacing of the second grid 11.
And step three, the sewage in the anaerobic tank 3 flows into an anoxic tank 4 (for anoxic reaction), an aerobic tank 5 (for aerobic reaction), a secondary sedimentation tank 6 (for sedimentation again) and a disinfection tank 7 (for disinfecting and discharging the sewage) in sequence for corresponding treatment.
And step four, conveying the medium particle impurities retained in the screening tank 2 into a fermentation tank 12 for fermentation, and conveying the fermentation product into an anoxic tank 4 for treatment, thereby supplementing a carbon source for the anoxic tank 4.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A sewage treatment device is characterized by comprising a primary sedimentation tank (1), a screening tank (2), an anaerobic tank (3), an anoxic tank (4), an aerobic tank (5), a secondary sedimentation tank (6) and a disinfection tank (7) which are communicated in sequence;
a first clapboard (8) is arranged between the primary sedimentation tank (1) and the screening tank (2), a first grid (9) for blocking large-particle impurities is arranged at the top of the first clapboard (8),
a second partition plate (10) is arranged between the screening tank (2) and the anaerobic tank (3), a second grid (11) for blocking medium particle impurities is arranged at the top of the second partition plate (10), and the grid spacing of the first grid (9) is larger than that of the second grid (11);
the screening tank (2) is communicated with a fermentation tank (12) through a conveying pump (13), so that medium particle impurities blocked in the screening tank (2) can be conveyed to the fermentation tank (12) for fermentation; the fermentation tank (12) is in communication with the anoxic tank (4) via a transfer pump (13) such that fermentation product may be transferred to the anoxic tank (4).
2. The sewage treatment plant according to claim 1, wherein a motor compartment (14) and a fermentation compartment (15) are arranged in the fermentation tank (12), and the fermentation compartment (15) is respectively communicated with the screening tank (2) and the anoxic tank (4); the motor cabin (14) with the fermentation cabin (15) are separated by the division board, be equipped with agitator motor in the motor cabin (14), be equipped with the stirring rake in the fermentation cabin (15), the one end of stirring rake is passed the division board and with agitator motor's pivot is connected.
3. The wastewater treatment plant according to claim 1, characterized in that a third partition (16) is arranged between the anaerobic tank (3) and the anoxic tank (4), and the bottom of the third partition (16) is provided with a wastewater through hole.
4. The sewage treatment device according to claim 1, wherein a fourth partition plate (17) is arranged between the aerobic tank (5) and the anoxic tank (4), and a sewage flow hole is arranged at the top of the fourth partition plate (17); a fifth partition plate (18) is arranged between the aerobic tank (5) and the secondary sedimentation tank (6), and a sewage flow through hole is formed in the top of the fifth partition plate (18); a first baffle plate (19) is arranged between the fourth partition plate (17) and the fifth partition plate (18), a first slope plate (20) which inclines towards the secondary sedimentation tank (6) is arranged between the fifth partition plate (18) and the bottom wall of the aerobic tank (5), and a sewage circulation hole is arranged between the first baffle plate (19) and the first slope plate (20).
5. The wastewater treatment plant according to claim 1, wherein the number of said aerobic tanks (5) is two or more, and all of said aerobic tanks (5) are connected in series.
6. The sewage treatment device according to claim 1, wherein a fifth partition (18) is arranged between the secondary sedimentation tank (6) and the aerobic tank (5), and a sewage flow through hole is formed in the top of the fifth partition (18); a sixth clapboard (23) is arranged between the secondary sedimentation tank (6) and the disinfection tank (7), and the top of the sixth clapboard (23) is provided with a sewage through hole; a second baffle plate (24) is arranged at the top of the secondary sedimentation tank (6), and the second baffle plate (24) is positioned between the fifth partition plate (18) and the sixth partition plate (23); a second slope plate (25) which inclines towards the aerobic tank (5) is arranged between the fifth partition plate (18) and the bottom wall of the secondary sedimentation tank (6), and a third slope plate (26) which inclines towards the disinfection tank (7) is arranged between the sixth partition plate (23) and the bottom wall of the secondary sedimentation tank (6).
7. Sewage treatment plant according to claim 6, characterised in that between said second baffle (24) and said fifth baffle (18) there are honeycomb ramps (29), all of said honeycomb ramps (29) being inclined towards said disinfection tank (7); a third baffle plate (30) is arranged on the bottom wall of the secondary sedimentation tank (6), the third baffle plate (30) is positioned between the second slope plate (25) and the third slope plate (26), and a vertical interval is formed between the second baffle plate (24) and the third baffle plate (30); the third baffle (30) is closer to the second baffle (24) than the sixth baffle (23).
8. The sewage treatment apparatus according to claim 1, wherein a sixth partition plate (23) is provided between the disinfection tank (7) and the secondary sedimentation tank (6), a sewage flow hole is provided at the top of the sixth partition plate (23), the disinfection tank (7) is provided with a seventh partition plate (31) opposite to the sixth partition plate (23), and a sewage flow hole is provided at the top of the seventh partition plate (31); a fourth baffle plate (32) is arranged between the sixth partition plate (23) and the seventh partition plate (31), and a gap is reserved between the bottom wall of the disinfection tank (7) and the fourth baffle plate (32).
9. The sewage treatment device according to claim 1, further comprising a device chamber (35), wherein an aeration fan (36) and an aeration controller (37) are arranged in the device chamber (35), and the aeration fan (36) is communicated with the aerobic tank (5) through a vent pipe to supply oxygen to the aerobic tank (5); the aeration controller (37) is used for controlling the aeration fan (36) to supply oxygen to the aerobic pool (5); the part of the aeration pipe positioned in the aerobic tank (5) is provided with an aerator (39); and an oxygen dissolving instrument (38) is also arranged in the aerobic pool (5) to monitor the dissolved oxygen amount of the sewage in the aerobic pool (5), and the oxygen dissolving instrument (38) is connected with the aeration controller (37).
10. A method of treating wastewater, comprising:
the sewage in the primary sedimentation tank (1) flows into a screening tank (2), and large-particle impurities in the primary sedimentation tank (1) are blocked in the primary sedimentation tank (1) by a first grid (9) for blocking the large-particle impurities;
the sewage in the screening tank (2) flows into an anaerobic tank (3), and medium particle impurities in the screening tank (2) are blocked in the screening tank (2) by a second grid (11) for blocking medium particle impurities, wherein the grid spacing of the first grid (9) is larger than the grid spacing of the second grid (11);
the sewage in the anaerobic tank (3) flows into the anoxic tank (4), the aerobic tank (5), the secondary sedimentation tank (6) and the disinfection tank (7) in sequence for corresponding treatment;
the medium particle impurities retained in the screening tank (2) are conveyed to a fermentation tank (12) for fermentation, and the fermentation product is conveyed to an anoxic tank (4) for treatment.
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| US20160002081A1 (en) * | 2013-02-22 | 2016-01-07 | General Electric Company | Wastewater treatment with membrane aerated biofilm and anaerobic digester |
| WO2019169980A1 (en) * | 2018-03-09 | 2019-09-12 | 上海世浦泰膜科技有限公司 | Anaerobic ammonia oxidation-based sewage treatment process using mbr |
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Application publication date: 20201218 |