CN114590891B - Integral multistage partial nitrification-anaerobic ammonia oxidation gradual denitrification process device - Google Patents
Integral multistage partial nitrification-anaerobic ammonia oxidation gradual denitrification process device Download PDFInfo
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- CN114590891B CN114590891B CN202011403711.5A CN202011403711A CN114590891B CN 114590891 B CN114590891 B CN 114590891B CN 202011403711 A CN202011403711 A CN 202011403711A CN 114590891 B CN114590891 B CN 114590891B
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 264
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 183
- 230000003647 oxidation Effects 0.000 title claims abstract description 177
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 132
- 238000000034 method Methods 0.000 title claims abstract description 38
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 195
- 239000001301 oxygen Substances 0.000 claims abstract description 195
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 195
- 239000002351 wastewater Substances 0.000 claims abstract description 67
- 239000011259 mixed solution Substances 0.000 claims abstract description 46
- 238000005273 aeration Methods 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000006243 chemical reaction Methods 0.000 claims abstract description 26
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims abstract description 13
- 239000006228 supernatant Substances 0.000 claims description 18
- 238000000926 separation method Methods 0.000 claims description 16
- 230000002950 deficient Effects 0.000 claims description 8
- 230000014759 maintenance of location Effects 0.000 claims description 8
- 239000010802 sludge Substances 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 6
- 230000000712 assembly Effects 0.000 claims description 5
- 238000000429 assembly Methods 0.000 claims description 5
- 238000005276 aerator Methods 0.000 claims description 3
- 238000012797 qualification Methods 0.000 claims 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 26
- 229910052757 nitrogen Inorganic materials 0.000 description 14
- 239000000203 mixture Substances 0.000 description 7
- 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 6
- 238000005516 engineering process Methods 0.000 description 6
- 238000007034 nitrosation reaction Methods 0.000 description 4
- 206010021143 Hypoxia Diseases 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009935 nitrosation Effects 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
- 238000009825 accumulation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- 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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- 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
Abstract
The application provides an integrated multistage partial nitrification-anaerobic ammonia oxidation gradual denitrification process device, which comprises the following steps: the oxidation ditch is a Carlo oxidation ditch, the oxidation ditch comprises an aeration zone and a reaction zone, the reaction zone is divided into a first dissolved oxygen zone … Nth dissolved oxygen zone, the first dissolved oxygen zone comprises a first oxygen-enriched section and a first anoxic section, the Nth dissolved oxygen zone comprises an Nth oxygen-enriched section and an Nth anoxic section, the Nth dissolved oxygen zone of the first dissolved oxygen zone … is connected end to form a circulating treatment flow channel of wastewater mixed solution, and the oxygen-enriched section and the anoxic section are alternately arranged; the aeration assembly is arranged in the aeration zone; and the anaerobic ammonia oxidation reactors are correspondingly arranged at the anoxic sections, and the wastewater mixed solution is circulated through the anaerobic ammonia oxidation reactors to carry out denitrification treatment until reaching the standard and then is discharged. The application solves the problem that the inflow water of the anaerobic ammonia oxidation reactor must maintain the specific proportion of ammonia nitrogen and nitrite when the wastewater is denitrified in the prior art.
Description
Technical Field
The application relates to the technical field of biological wastewater treatment, in particular to an integrated multistage partial nitrification-anaerobic ammonia oxidation gradual denitrification process device.
Background
In recent years, with the progress of technical means and the deep research, the research of novel biological denitrification technologies such as short-cut nitrification and denitrification, synchronous nitrification and denitrification, anaerobic ammonia oxidation technology and the like has made breakthrough progress, and the industrial application stage has been entered. Anaerobic ammonia oxidation is the most economical novel high-efficiency biological denitrification technology known at present, and the partial nitrosation-anaerobic ammonia oxidation denitrification process is a common process form applied to the anaerobic ammonia oxidation technology, and has the characteristics of low energy consumption, low cost, low pollution and high efficiency compared with the traditional nitrosation denitrification process.
When the anaerobic ammonia oxidation technology is applied to the denitrification treatment of the wastewater, the problem of the nitrosation reaction process needs to be solved first, and NH can be simultaneously contained for the anaerobic ammonia oxidation reaction 3 - N and NO 2 - The feed water of N and the ratio of ammonia nitrogen to nitrite (NH 3 -N/NO 2 - -N) control needs to be controlled within a certain range. However, the nitrite reaction process is quickly converted into complete nitrification reaction due to strong adaptability of the nitrate bacteria, and the proper ammonia nitrogen to nitrite ratio (NH) 3 -N/NO 2 - -N)。
From the above, the prior art has the problem that the inflow water of the anaerobic ammonia oxidation reactor must maintain a specific ratio of ammonia nitrogen to nitrite during denitrification of wastewater.
Disclosure of Invention
The application mainly aims to provide an integrated multistage partial nitrification-anaerobic ammonia oxidation gradual denitrification process device, which aims to solve the problem that the inflow water of an anaerobic ammonia oxidation reactor must maintain a specific proportion of ammonia nitrogen and nitrite when wastewater is denitrified in the prior art.
In order to achieve the above object, the present application provides an integrated multistage partial nitrification-anaerobic ammonia oxidation gradual denitrification process apparatus, comprising: the oxidation ditch is a Carlo oxidation ditch, the oxidation ditch comprises an aeration zone and a reaction zone, the wastewater mixed solution enters the oxidation ditch from the aeration zone, the reaction zone is sequentially divided into a first dissolved oxygen zone and a second dissolved oxygen zone … Nth dissolved oxygen zone along the flow direction of the wastewater mixed solution, the first dissolved oxygen zone comprises a first oxygen-enriched section and a first anoxic section, the second dissolved oxygen zone comprises a second oxygen-enriched section and a second anoxic section, the Nth dissolved oxygen zone comprises an Nth oxygen-enriched section and an Nth anoxic section, the first dissolved oxygen zone, the second dissolved oxygen zone … and the Nth dissolved oxygen zone are connected end to form a circulating treatment runner of the wastewater mixed solution, and all the oxygen-enriched sections and all the anoxic sections are alternately arranged along the flow direction of the wastewater mixed solution, wherein N is the number of the oxidation ditch; the aeration assembly is arranged in the aeration zone; the anaerobic ammonia oxidation reactors are arranged, the anaerobic ammonia oxidation reactors are correspondingly arranged at the anoxic sections, and the wastewater mixed solution circulates through the anaerobic ammonia oxidation reactors to carry out denitrification treatment until reaching standards and is discharged.
Further, the anaerobic ammonia oxidation reactor comprises a first anaerobic ammonia oxidation reactor and a second anaerobic ammonia oxidation reactor, wherein the first anaerobic ammonia oxidation reactor is arranged at the Nth anoxic section, at least one second anaerobic ammonia oxidation reactor is arranged, and at least one second anaerobic ammonia oxidation reactor is correspondingly arranged at the anoxic section except the Nth anoxic section.
Further, the anaerobic ammonia oxidation reactor comprises: the mud-water separation assembly is used for separating the wastewater mixed solution into supernatant fluid and concentrated sludge; the anaerobic ammonia oxidation assembly is sequentially connected with the mud-water separation assembly and is positioned at the downstream of the mud-water separation assembly, supernatant enters the anaerobic ammonia oxidation assembly to perform anaerobic ammonia oxidation reaction, concentrated sludge is discharged into the oxidation ditch to continue circulation, all anaerobic ammonia oxidation assemblies of the anaerobic ammonia oxidation reactors all comprise substandard water outlets, the substandard supernatant is discharged from the substandard water outlets into the oxidation ditch to continue circulation, the anammox assembly of the first anaerobic ammonia oxidation reactor comprises the substandard water outlets, and the substandard supernatant is discharged from the substandard water outlets.
Further, the ratio of the flow rate of the wastewater mixed solution entering the anaerobic ammonia oxidation reactor to the design flow rate of the integrated multistage partial nitrification-anaerobic ammonia oxidation gradual denitrification process device is 0.4:1 to 1:1.
Further, the aeration component is any one of a surface mechanical aerator or a submersible aeration impeller.
Further, the dissolved oxygen in the first dissolved oxygen area to the dissolved oxygen in the nth dissolved oxygen area are sequentially reduced.
Further, the oxidation ditch is a three-ditch serial oxidation ditch, the Nth dissolved oxygen area is a third dissolved oxygen area, the Nth oxygen-enriched section is a third oxygen-enriched section, and the Nth oxygen-enriched section is a third oxygen-enriched section.
Further, the dissolved oxygen of the first oxygen-enriched section is 1.2mg/L to 2.5mg/L; and/or the dissolved oxygen of the second oxygen-enriched section is 0.8mg/L to 1.2mg/L; and/or the dissolved oxygen in the third oxygen-enriched section is 0.2mg/L to 1.0mg/L.
Further, the gallery width of the oxygen-enriched section is less than the gallery width of the oxygen-depleted section.
Further, the pH value of the oxygen enrichment section is 7.8 to 8.5; and/or the total hydraulic residence time of the oxygen-enriched section is 12 to 18 hours.
Further, the ratio of ammonia nitrogen to nitrite in the wastewater mixed solution is 1:1 to 3:1.
By means of the technical scheme, the Karussell oxidation ditch is arranged, the aeration assembly and the anaerobic ammonia oxidation reactor are arranged in the oxidation ditch, the oxidation ditch comprises an aeration area and a reaction area, the reaction area is sequentially divided into a first dissolved oxygen area and a second dissolved oxygen area … Nth dissolved oxygen area along the flow direction of the wastewater mixed solution, the first dissolved oxygen area comprises a first oxygen-enriched section and a first anoxic section, the second dissolved oxygen area comprises a second oxygen-enriched section and a second anoxic section, the Nth dissolved oxygen area comprises an Nth oxygen-enriched section and an Nth anoxic section, the first dissolved oxygen area, the second dissolved oxygen area … and the Nth dissolved oxygen area are connected end to form a circulating treatment flow passage of the wastewater mixed solution, all the oxygen-enriched sections and all the anoxic sections are alternately arranged along the flow direction of the wastewater mixed solution, the aeration assembly is arranged in the aeration area, the anaerobic ammonia oxidation reactor is a plurality of the anaerobic ammonia oxidation reactors, the anaerobic ammonia oxidation reactors are correspondingly arranged at the anoxic sections, the wastewater mixed solution is circulated through the anaerobic ammonia oxidation reactors to be treated until the wastewater mixed solution reaches the standard, the standard and is discharged, the nitrite is not required to be strictly controlled, the specific nitrogen removal ratio of the nitrite in the wastewater is low, the existing ammonia nitrogen removal process is required to be controlled, the nitrogen removal ratio is low, and the ammonia nitrogen removal ratio in the existing nitrogen removal process is low, the nitrogen removal process has the problem is solved, and the nitrogen removal ratio is low, and the existing in the technology has low, and the problem is low, and the cost of the nitrogen removal ratio is low.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 shows a schematic structural diagram of an integrated multistage partial nitrification-anaerobic ammonia oxidation gradual denitrification process apparatus in an embodiment of the present application.
Wherein the above figures include the following reference numerals:
10. an oxidation ditch; 11. an aeration zone; 12. a reaction zone; 121. a first dissolved oxygen zone; 1211. a first oxygen enrichment section; 1212. a first anoxic section; 122. a second dissolved oxygen zone; 1221. a second oxygen enrichment section; 1222. a second anoxic section; 123. a third dissolved oxygen zone; 1231. a third oxygen enrichment section; 1232. a third anoxic section; 20. an aeration assembly; 30. an anaerobic ammoxidation reactor; 31. a mud-water separation assembly; 32. an anaerobic ammonia oxidation assembly; 321. and (5) reaching the standard of the water outlet.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.
In the present application, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, upright or gravitational direction; also, for ease of understanding and description, "inner and outer" refers to inner and outer relative to the profile of each component itself, but the above-mentioned orientation terms are not intended to limit the present application.
It will be apparent that the embodiments described above are merely some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
The application provides an integrated multistage partial nitrification-anaerobic ammonia oxidation gradual denitrification process device, which aims to solve the problem that the specific proportion of ammonia nitrogen to nitrite must be maintained in the water inlet of an anaerobic ammonia oxidation reactor during wastewater denitrification in the prior art.
As shown in FIG. 1, the integrated multistage partial nitrification-anaerobic ammonia oxidation gradual denitrification process apparatus includes an oxidation ditch 10, an aeration assembly 20, and an anaerobic ammonia oxidation reactor 30. The oxidation ditch 10 is a Carossel oxidation ditch, the oxidation ditch 10 comprises an aeration zone 11 and a reaction zone 12, the wastewater mixed solution enters the oxidation ditch 10 from the aeration zone 11, the reaction zone 12 is sequentially divided into a first dissolved oxygen zone 121 and a second dissolved oxygen zone 122 and … N-th dissolved oxygen zone along the flow direction of the wastewater mixed solution, the first dissolved oxygen zone 121 comprises a first oxygen-enriched section 1211 and a first oxygen-deficient section 1212, the second dissolved oxygen zone 122 comprises a second oxygen-enriched section 1221 and a second oxygen-deficient section 1222, the N-th dissolved oxygen zone comprises an N-th oxygen-enriched section and an N-th oxygen-deficient section, the first dissolved oxygen zone 121, the second dissolved oxygen zone 122 … and the N-th dissolved oxygen zone are connected end to form a circulating treatment flow channel of the wastewater mixed solution, and all the oxygen-enriched sections and all the oxygen-deficient sections are alternately arranged along the flow direction of the wastewater mixed solution, wherein N is the number of the oxidation ditch 10. An aeration assembly 20 is disposed within the aeration zone 11. The anaerobic ammonia oxidation reactors 30 are multiple, the anaerobic ammonia oxidation reactors 30 are correspondingly arranged at the anoxic sections, and the wastewater mixed solution circulates through the anaerobic ammonia oxidation reactors 30 to carry out denitrification treatment until reaching standards and is discharged.
By arranging the Carossel type oxidation ditch 10 and arranging the aeration assembly 20 and the anaerobic ammonia oxidation reactor 30 in the oxidation ditch 10, the oxidation ditch 10 comprises an aeration zone 11 and a reaction zone 12, the reaction zone 12 is sequentially divided into a first dissolved oxygen zone 121 and a second dissolved oxygen zone 122 and … Nth dissolved oxygen zone along the flow direction of the wastewater mixed solution, the first dissolved oxygen zone 121 comprises a first oxygen-enriched section 1211 and a first anoxic section 1212, the second dissolved oxygen zone 122 comprises a second oxygen-enriched section 1221 and a second anoxic section 1222, the Nth dissolved oxygen zone comprises an Nth oxygen-enriched section and an Nth anoxic section, the first dissolved oxygen zone 121, the second dissolved oxygen zone 122 … and the Nth dissolved oxygen zone are connected end to form a circulation treatment flow channel of the wastewater mixed solution, all the sections and all the anoxic sections are alternately arranged along the flow direction of the wastewater mixed solution, the aeration assembly 20 is arranged in the aeration zone 11, the anaerobic ammonia oxidation reactor 30 is a plurality of the anaerobic ammonia oxidation reactors 30, the anaerobic ammonia oxidation reactors 30 are correspondingly arranged at the anoxic sections, the anaerobic mixed solution circulation treatment flow channel is strictly up to the standard, the ammonia oxidation reactor is controlled by the anaerobic ammonia oxidation reactor 30, the ammonia oxidation reactor has low ammonia nitrogen removal efficiency, the ammonia nitrogen removal process is controlled to be low, the ammonia nitrogen removal process is difficult, the denitrification process is controlled, and the wastewater is low, and the cost is low, and the denitrification rate is difficult to be controlled.
In this embodiment, the oxidation ditch 10 is a three-ditch serial oxidation ditch. The nth dissolved oxygen zone is the third dissolved oxygen zone 123. The nth oxygen enrichment stage is a third oxygen enrichment stage 1231. The nth anoxic section is the third anoxic section 1232.
In the present embodiment, the dissolved oxygen of the first dissolved oxygen area 121 to the nth dissolved oxygen area is sequentially reduced. Specifically, the nth dissolved oxygen area is the third dissolved oxygen area 123, and then the dissolved oxygen of the first dissolved oxygen area 121 is smaller than the dissolved oxygen of the second dissolved oxygen area 122, and the dissolved oxygen of the second dissolved oxygen area 122 is smaller than the dissolved oxygen of the third dissolved oxygen area 123.
In this embodiment, the dissolved oxygen in the first oxygen-enriched section 1211 is 1.2mg/L to 2.5mg/L. The dissolved oxygen of the second oxygen-enriched stage 1221 is from 0.8mg/L to 1.2mg/L. The dissolved oxygen of the third oxygen-enriched stage 1231 is 0.2mg/L to 1.0mg/L.
In the present embodiment, the aeration zone 11 is provided at the turn of each of the oxidation channels 10. Specifically, the oxidation ditch 10 is three ditches in series, and then the aeration areas 11 are three, and the three aeration areas 11 are respectively positioned at the turning positions of the three ditches of the oxidation ditch 10. Accordingly, the number of the aeration assemblies 20 is three, and the three aeration assemblies 20 are respectively arranged in the three aeration areas 11.
In this embodiment, the ratio of the flow rate of the wastewater mixture entering the anaerobic ammonium oxidation reactor 30 to the design flow rate of the integrated multistage partial nitrification-anaerobic ammonium oxidation gradual denitrification process apparatus is 0.4:1 to 1:1.
In the present embodiment, the anaerobic ammonia oxidation reactor 30 includes a first anaerobic ammonia oxidation reactor and a second anaerobic ammonia oxidation reactor, the first anaerobic ammonia oxidation reactor is disposed at the nth anoxic section, at least one of the second anaerobic ammonia oxidation reactors, and at least one of the second anaerobic ammonia oxidation reactors is disposed at the anoxic sections other than the nth anoxic section. Specifically, the oxidation ditch 10 is a three-ditch serial oxidation ditch, and the nth anoxic section is a third anoxic section 1232. Accordingly, the first anaerobic ammonia oxidation reactor is disposed at the third anoxic stage 1232. Two second anaerobic ammoxidation reactors are arranged at the first anoxic section 1212 and the second anoxic section 1222 respectively.
In this embodiment, the first anaerobic ammonia oxidation reactor and the second anaerobic ammonia oxidation reactor are different types of anaerobic ammonia oxidation reactors. Specifically, the first anaerobic ammonia oxidation reactor is a T-type anaerobic ammonia oxidation reactor. The second anaerobic ammonia oxidation reactor is an M-type anaerobic ammonia oxidation reactor. Wherein, the ratio of the treated water amount of the T-type anaerobic ammonia oxidation reactor to the designed treated water amount of the integrated multistage partial nitrification-anaerobic ammonia oxidation gradual denitrification process device is 0.4:1 to 1:1. The water treatment amount of the wastewater mixed solution in the M-type anaerobic ammonia oxidation reactor is more than or equal to the designed water treatment amount of the integrated multistage partial nitrification-anaerobic ammonia oxidation gradual denitrification process device.
As shown in fig. 1, the anaerobic ammonia oxidation reactor 30 includes a mud-water separation assembly 31 and an anaerobic ammonia oxidation assembly 32. The mud-water separation assembly 31 is used for separating the wastewater mixed liquor into supernatant fluid and concentrated sludge. The anaerobic ammonia oxidation assembly 32 is sequentially connected with the mud-water separation assembly 31 and is positioned at the downstream of the mud-water separation assembly 31, the supernatant enters the anaerobic ammonia oxidation assembly 32 for anaerobic ammonia oxidation reaction, concentrated sludge is discharged into the oxidation ditch 10 for continuous circulation, all the anaerobic ammonia oxidation assemblies 32 of the anaerobic ammonia oxidation reactor 30 comprise substandard water outlets, the substandard supernatant is discharged from the substandard water outlets into the oxidation ditch 10 for continuous circulation, the anaerobic ammonia oxidation assembly 32 of the first anaerobic ammonia oxidation reactor comprises the substandard water outlets 321, and the substandard supernatant is discharged from the substandard water outlets 321. That is, the supernatant fluid treated by the first anaerobic ammoxidation reactor and the second anaerobic ammoxidation reactor is mixed with the wastewater mixed solution, and then the circulation treatment is continued. Wherein, part of supernatant fluid after being treated by the first anaerobic ammonia oxidation reactor can reach the emission standard, so as to be discharged from the standard reaching water outlet 321.
In this embodiment, the aeration assembly 20 is any one of a surface mechanical aerator or a submersible aeration impeller.
In this embodiment, the gallery width of the oxygen-enriched section is less than the gallery width of the oxygen-depleted section.
In this embodiment, the pH of the oxygen-enriched section is 7.8 to 8.5. The Free Ammonia (FA) in the oxygen-enriched section can influence the activity of nitrifying bacteria, so that the nitrite nitrogen accumulation rate is further influenced, and the pH value in the ammoxidation reaction is a key parameter, so that the pH value is controlled to control the ratio of ammonia nitrogen to nitrite nitrogen to be in the range of 1:1 to 3:1.
In this embodiment, the total hydraulic residence time of the oxygen-enriched section is 12h to 18h.
In the present embodiment, since the oxidation ditch 10 includes three dissolved oxygen zones and the dissolved oxygen of each dissolved oxygen zone is sequentially reduced, 3 series zones of a high dissolved oxygen zone, a medium dissolved oxygen zone, and a low dissolved oxygen zone are formed. The wastewater mixed solution can be subjected to multi-stage alternating circulation such as oxygen enrichment, oxygen deficiency, oxygen enrichment, oxygen deficiency and the like in the oxidation ditch 10, mainly subjected to ammoxidation (i.e. nitrosation) reaction in the oxygen enrichment section, and subjected to anaerobic ammoxidation denitrification reaction in the anaerobic ammoxidation reactor 30 in the oxygen deficiency section.
In one embodiment, the wastewater first enters the first oxygen-enriched section 1211 of the first dissolved oxygen zone 121 and the mixed liquor within the oxidation ditch 10 to form a wastewater mixed liquor. The wastewater mixed liquor is subjected to ammoxidation reaction in the first oxygen-enriched section 1211, and part of ammonia nitrogen in the wastewater mixed liquor is oxidized into nitrite nitrogen, namely part of ammonia nitrogen is removed. The parameters controlling the first oxygen-enriched segment 1211 at this stage are: dissolved oxygen is 1.2mg/L to 2.5mg/L; a pH of 8.0 to 8.3; the hydraulic retention time is 4 to 6 hours. And the nitrosation reaction process and the proportion of ammonia nitrogen to nitrite are not required to be strictly controlled in the stage, and the proportion of ammonia nitrogen to nitrite in the wastewater mixed solution is only required to be controlled within a wide range of 1:1 to 3:1, namely the ammonia nitrogen excess stage. The wastewater mixed solution after ammoxidation enters a first anoxic section 1212, most of the wastewater mixed solution enters a second anaerobic ammoxidation reactor, the sludge-water separation assembly 31 separates the wastewater mixed solution into supernatant fluid and concentrated sludge, and the hydraulic retention time of the sludge-water separation assembly 31 is 2.5h. And in the process, part of dissolved oxygen in the mixed solution is consumed, so that the influence of the dissolved oxygen on the subsequent anaerobic ammoxidation reaction is reduced. The supernatant enters the anaerobic ammonia oxidation assembly 32 to complete the anaerobic ammonia oxidation reaction process, and the hydraulic retention time of the anaerobic ammonia oxidation assembly 32 is 1.5 to 4 hours. Thus, part of ammonia nitrogen and most of nitrite nitrogen in the wastewater mixed solution entering the second anaerobic ammonia oxidation reactor are removed. The supernatant and concentrated sludge, from which some of the ammonia nitrogen and most of the nitrite nitrogen are removed, is discharged into the oxidation ditch 10 and continues into the second dissolved oxygen area 122 with the remaining wastewater mixture. As part of the ammonia nitrogen and most of the nitrite nitrogen are removed, the ammonia nitrogen and total nitrogen concentration levels in the wastewater mixture entering the second dissolved oxygen zone 122 are lower than the wastewater mixture level in the first dissolved oxygen zone 121. The same reaction process is carried out, and parameters of the second oxygen-enriched section 1221 are controlled at this stage: dissolved oxygen is 0.8mg/L to 1.2mg/L; a pH of 8.0 to 8.3; the hydraulic retention time is 4 to 6 hours; the hydraulic retention time of the mud-water separation assembly 31 is 2.5h; the hydraulic residence time of anaerobic ammonia oxidation assembly 32 is from 1.5 hours to 2.5 hours. The ammonia nitrogen and total nitrogen concentration levels of the wastewater mixture treated by the second dissolved oxygen zone 122 are again reduced, so that the ammonia nitrogen and total nitrogen concentration levels in the wastewater mixture entering the third dissolved oxygen zone 123 are lower than the wastewater mixture levels of the second dissolved oxygen zone 122. Again, the same reaction process is performed, and parameters of the third oxygen enrichment stage 1231 are controlled as follows: dissolved oxygen is 0.2mg/L to 0.8mg/L; a pH of 8.0 to 8.3; the hydraulic retention time is 4 to 6 hours; the hydraulic retention time of the mud-water separation assembly 31 is 2.5h; the hydraulic residence time of anaerobic ammonia oxidation assembly 32 is from 2 hours to 4 hours. Because ammonia nitrogen in the wastewater mixed solution in the third dissolved oxygen area 123 is low, partial ammonia oxidation reaction of low-level ammonia nitrogen can be completed through a small amount of aeration. The wastewater mixed solution enters the first anaerobic ammonia oxidation reactor, and part of separated supernatant can be subjected to more thorough anaerobic ammonia oxidation denitrification reaction and then ammonia nitrogen and total nitrogen, so that the wastewater mixed solution can reach the discharge standard and is discharged from the standard water outlet 321. The remaining wastewater mixed liquor continues to enter the first dissolved oxygen area 121 to be mixed with newly injected wastewater to enter the next stage of alternating circulation process.
From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects: by arranging the oxidation ditch 10 with multiple ditches connected in series and arranging the aeration assembly 20 and the anaerobic ammonia oxidation reactor 30 in the oxidation ditch 10, the oxidation ditch 10 comprises an aeration zone 11 and a reaction zone 12, the reaction zone 12 is sequentially divided into a first dissolved oxygen zone 121 and a second dissolved oxygen zone 122 … Nth dissolved oxygen zone along the flow direction of the wastewater mixed solution, the first dissolved oxygen zone 121 comprises a first oxygen-enriched section 1211 and a first anoxic section 1212, the second dissolved oxygen zone 122 comprises a second oxygen-enriched section 1221 and a second anoxic section 1222, the Nth dissolved oxygen zone comprises an Nth oxygen-enriched section and an Nth anoxic section, the first dissolved oxygen zone 121, the second dissolved oxygen zone 122 … and the Nth dissolved oxygen zone are connected end to form a circulation treatment flow channel of the wastewater mixed solution, and all the oxygen-enriched sections and all the anoxic sections are alternately arranged along the flow direction of the wastewater mixed solution, the aeration assembly 20 is arranged in the aeration zone 11, the anaerobic ammonia oxidation reactor 30 is a plurality of the anaerobic ammonia oxidation reactors 30 are correspondingly arranged at the sections, the anaerobic ammonia oxidation reactors 30, the anaerobic ammonia oxidation reactors are circularly treated by the anaerobic ammonia oxidation reactors, the anaerobic ammonia oxidation reactors reach the standard, the mixed solution is completely through the anaerobic ammonia oxidation reactors 30, the nitrogen removal reaction is controlled by the ammonia oxidation reactors, the nitrogen removal process is difficult, the nitrogen removal process is low, the ammonia nitrogen removal efficiency is low, the ammonia nitrogen removal is difficult, the wastewater is difficult to be difficult, the mixed and the denitrification process is low, and the cost is low, and the ammonia can be difficult to be discharged by the mixed and the waste is low.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (7)
1. An integrated multistage partial nitrification-anaerobic ammonia oxidation gradual denitrification process device is characterized by comprising:
an oxidation ditch (10), wherein the oxidation ditch (10) is a Carossell oxidation ditch, the oxidation ditch (10) comprises an aeration zone (11) and a reaction zone (12), a wastewater mixed solution enters the oxidation ditch (10) from the aeration zone (11), the reaction zone (12) is sequentially divided into a first dissolved oxygen zone (121), a second dissolved oxygen zone (122) … Nth dissolved oxygen zone along the flow direction of the wastewater mixed solution, the first dissolved oxygen zone (121) comprises a first oxygen-enriched section (1211) and a first oxygen-deficient section (1212), the second dissolved oxygen zone (122) comprises a second oxygen-enriched section (1221) and a second oxygen-deficient section (1222), the Nth dissolved oxygen zone comprises an Nth oxygen-enriched section and an Nth oxygen-deficient section, the first dissolved oxygen zone (121), the second dissolved oxygen zone (122) … and the Nth dissolved oxygen zone are connected end to form a circulation treatment flow passage of the wastewater mixed solution, and all oxygen-enriched sections and all oxygen-deficient sections are arranged along the flow direction of the mixed solution, wherein the wastewater is the oxidation ditch (10);
an aeration assembly (20), the aeration assembly (20) being disposed within the aeration zone (11);
the anaerobic ammonia oxidation reactors (30), wherein the anaerobic ammonia oxidation reactors (30) are multiple, the anaerobic ammonia oxidation reactors (30) are correspondingly arranged at the anoxic sections, and the wastewater mixed solution is circulated through the anaerobic ammonia oxidation reactors (30) to carry out denitrification treatment until reaching standards and is discharged;
the anaerobic ammonia oxidation reactor (30) comprises a first anaerobic ammonia oxidation reactor and a second anaerobic ammonia oxidation reactor, wherein the first anaerobic ammonia oxidation reactor is arranged at the Nth anoxic section, at least one second anaerobic ammonia oxidation reactor is arranged, and at least one second anaerobic ammonia oxidation reactor is correspondingly arranged at the anoxic section except the Nth anoxic section;
the anaerobic ammonia oxidation reactor (30) comprises:
the mud-water separation assembly (31), the said mud-water separation assembly (31) is used for separating the said waste water mixed liquor into supernatant fluid and concentrated mud;
the anaerobic ammonia oxidation assembly (32), the anaerobic ammonia oxidation assembly (32) is sequentially connected with the mud-water separation assembly (31) and is positioned at the downstream of the mud-water separation assembly (31), the supernatant enters the anaerobic ammonia oxidation assembly (32) to perform anaerobic ammonia oxidation reaction, the concentrated sludge is discharged into the oxidation ditch (10) to continue circulation, all the anaerobic ammonia oxidation assemblies (32) of the anaerobic ammonia oxidation reactor (30) comprise substandard water outlets, the substandard supernatant is discharged into the oxidation ditch (10) from the substandard water outlets to continue circulation, the anaerobic ammonia oxidation assembly (32) of the first anaerobic ammonia oxidation reactor comprises a substandard water outlet (321), and the supernatant after the qualification is discharged from the substandard water outlet (321);
the dissolved oxygen of the first dissolved oxygen area (121) to the dissolved oxygen of the nth dissolved oxygen area are sequentially reduced;
the ratio of ammonia nitrogen to nitrite in the wastewater mixed solution is 1:1 to 3:1.
2. The integrated multistage partial nitrification-anaerobic ammonia oxidation gradual denitrification process apparatus according to claim 1, wherein a ratio of a flow rate of the wastewater mixed liquor entering the anaerobic ammonia oxidation reactor (30) to a design flow rate of the integrated multistage partial nitrification-anaerobic ammonia oxidation gradual denitrification process apparatus is 0.4:1 to 1:1.
3. The integrated multistage partial nitrification-anaerobic ammonia oxidation gradual denitrification process apparatus according to claim 1, wherein the aeration assembly (20) is any one of a surface mechanical aerator or a submerged aeration impeller.
4. A process unit for integrated multistage partial nitrification-anaerobic ammonia oxidation gradual denitrification according to any one of claims 1 to 3, characterized in that the oxidation ditch (10) is a three-ditch serial oxidation ditch, the nth dissolved oxygen zone is a third dissolved oxygen zone (123), the nth oxygen-enriched section is a third oxygen-enriched section (1231), and the nth oxygen-enriched section is a third oxygen-enriched section (1232).
5. The integrated multistage partial nitrification-anaerobic ammonia oxidation gradual denitrification process apparatus according to claim 4, wherein,
the dissolved oxygen of the first oxygen-enriched section (1211) is 1.2mg/L to 2.5mg/L; and/or
The dissolved oxygen of the second oxygen-enriched section (1221) is 0.8mg/L to 1.2mg/L; and/or
The dissolved oxygen of the third oxygen-enriched section (1231) is 0.2mg/L to 1.0mg/L.
6. The integrated multistage partial nitrification-anaerobic ammonia oxidation gradual denitrification process apparatus according to any one of claims 1 to 3, wherein a gallery width of the oxygen-enriched section is smaller than a gallery width of the anoxic section.
7. An integrated multistage partial nitrification-anaerobic ammonia oxidation gradual denitrification process apparatus according to any one of claims 1 to 3, characterized in that,
the pH value of the oxygen enrichment section is 7.8 to 8.5; and/or
The total hydraulic retention time of the oxygen enrichment section is 12 to 18 hours.
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|---|---|---|---|---|
| JP2006281003A (en) * | 2005-03-31 | 2006-10-19 | Hitachi Zosen Corp | Biological waste water treatment method |
| CN103102044A (en) * | 2013-01-02 | 2013-05-15 | 北京工业大学 | Method for strengthening autotrophic denitrification effect of urban sewage by using oxidation ditch |
| CN203048738U (en) * | 2013-01-02 | 2013-07-10 | 北京工业大学 | Device for strengthening autotrophic nitrogen removal of urban wastewater oxidation ditch process |
| CN108585347A (en) * | 2018-03-21 | 2018-09-28 | 北京工业大学 | A kind of device and method that segmental influent oxidation ditch process adjusts low C/N municipal sewages |
| CN111908605A (en) * | 2020-08-28 | 2020-11-10 | 桂林理工大学 | Method for treating domestic sewage by anaerobic ammonia oxidation-oxidation ditch coupling |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006281003A (en) * | 2005-03-31 | 2006-10-19 | Hitachi Zosen Corp | Biological waste water treatment method |
| CN103102044A (en) * | 2013-01-02 | 2013-05-15 | 北京工业大学 | Method for strengthening autotrophic denitrification effect of urban sewage by using oxidation ditch |
| CN203048738U (en) * | 2013-01-02 | 2013-07-10 | 北京工业大学 | Device for strengthening autotrophic nitrogen removal of urban wastewater oxidation ditch process |
| CN108585347A (en) * | 2018-03-21 | 2018-09-28 | 北京工业大学 | A kind of device and method that segmental influent oxidation ditch process adjusts low C/N municipal sewages |
| CN111908605A (en) * | 2020-08-28 | 2020-11-10 | 桂林理工大学 | Method for treating domestic sewage by anaerobic ammonia oxidation-oxidation ditch coupling |
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