CN117566908B - Denitrification device and method for anaerobic ammonium oxidation system sedimentation tank - Google Patents
Denitrification device and method for anaerobic ammonium oxidation system sedimentation tank Download PDFInfo
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- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 156
- 230000003647 oxidation Effects 0.000 title claims abstract description 138
- 238000004062 sedimentation Methods 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims abstract description 25
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 title claims abstract description 13
- 239000002131 composite material Substances 0.000 claims abstract description 83
- 239000000945 filler Substances 0.000 claims abstract description 82
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 40
- 241000894006 Bacteria Species 0.000 claims abstract description 28
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 288
- 229910021529 ammonia Inorganic materials 0.000 claims description 144
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 34
- 239000002351 wastewater Substances 0.000 claims description 19
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 230000001651 autotrophic effect Effects 0.000 claims description 6
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 2
- 238000012856 packing Methods 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims description 2
- 230000002360 prefrontal effect Effects 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 11
- 239000010802 sludge Substances 0.000 description 10
- 239000010865 sewage Substances 0.000 description 9
- 230000001276 controlling effect Effects 0.000 description 6
- 230000001079 digestive effect Effects 0.000 description 4
- 239000011259 mixed solution Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 239000002243 precursor Substances 0.000 description 3
- 241000191043 Rhodobacter sphaeroides Species 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 241000203069 Archaea Species 0.000 description 1
- 241000192710 Microcystis aeruginosa Species 0.000 description 1
- 241001453382 Nitrosomonadales Species 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000149 chemical water pollutant Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000009283 thermal hydrolysis Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2806—Anaerobic processes using solid supports for microorganisms
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/286—Anaerobic digestion processes including two or more steps
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2866—Particular arrangements for anaerobic reactors
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/003—Downstream control, i.e. outlet monitoring, e.g. to check the treating agents, such as halogens or ozone, leaving the process
-
- 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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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- 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
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- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
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Abstract
本发明公开了一种应用于厌氧氨氧化系统沉淀池的脱氮装置及方法，该装置包括：上层厌氧氨氧化复合生物填料组件、下层厌氧氨氧化复合生物填料组件和出水截留网；出水截留网设置于竖流沉淀池的出水口；上层厌氧氨氧化复合生物填料组件包括多个沿水平方向间隔设置的上层横向固定杆以及多组可移动式复合生物填料球串；下层厌氧氨氧化复合生物填料组件包括多个沿水平方向间隔设置的下层横向固定杆以及多组固定式复合生物填料球串；每组复合生物填料球串均包括多个沿纵向串联在一起的填料球。本发明能够解决厌氧氨氧化系统沉淀池出水氨氮控制困难、达标稳定性不易得到保障以及厌氧氨氧化菌流失的问题。
The present invention discloses a denitrification device and method applied to a sedimentation tank of an anaerobic ammonium oxidation system, the device comprising: an upper anaerobic ammonium oxidation composite biological filler assembly, a lower anaerobic ammonium oxidation composite biological filler assembly and an effluent interception net; the effluent interception net is arranged at the outlet of the vertical flow sedimentation tank; the upper anaerobic ammonium oxidation composite biological filler assembly comprises a plurality of upper horizontal fixed rods arranged at intervals in the horizontal direction and a plurality of groups of movable composite biological filler ball strings; the lower anaerobic ammonium oxidation composite biological filler assembly comprises a plurality of lower horizontal fixed rods arranged at intervals in the horizontal direction and a plurality of groups of fixed composite biological filler ball strings; each group of composite biological filler ball strings comprises a plurality of filler balls connected in series in the longitudinal direction. The present invention can solve the problems of difficulty in controlling ammonia nitrogen in the effluent of the sedimentation tank of an anaerobic ammonium oxidation system, difficulty in ensuring the stability of reaching the standard, and loss of anaerobic ammonium oxidation bacteria.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a denitrification device and a denitrification method applied to a sedimentation tank of an anaerobic ammonia oxidation system.
Background
The graceful water environment becomes an urgent need of people in good life, and serious water pollution phenomena such as water bloom, red tide, black and odorous and the like are closely related to nitrogen exceeding, and sewage denitrification is an important point and a difficult point of water environment construction. Anaerobic ammonia oxidizing bacteria are red archaea which originate more than 30 hundred million years ago, have unique anaerobic ammonia oxidizing bodies, can convert ammonia nitrogen and nitrite nitrogen into nitrogen in one step, and compared with the traditional denitrification technology, the sewage rhodobacter sphaeroides denitrification has remarkable advantages in the aspects of medicament saving, greenhouse gas emission reduction, land occupation saving, electricity consumption saving and the like.
At present, in the actual engineering operation regulation and control of a high ammonia nitrogen anaerobic ammonia oxidation system for denitrifying by using digestive juice rhodobacter sphaeroides, the control of ammonia nitrogen in the effluent of an anaerobic ammonia oxidation pond becomes a main factor affecting the denitrification efficiency and capacity of the system, and the concentration of ammonia nitrogen in the effluent is too low, so that the rise of dissolved oxygen at the tail end can be caused, thereby inhibiting anaerobic ammonia oxidation bacteria and leading to the enrichment of NOB in a large quantity, forming a vicious circle and finally leading to the system breakdown. In order to prevent the occurrence of the situation, when the system is regulated and controlled, the ammonia nitrogen concentration of the effluent of the front-end anaerobic ammonia oxidation pond is always controlled to be in a safer range (more than 40 mg/L), however, the effluent of the subsequent sedimentation pond still has high ammonia nitrogen and nitrite content, and finally the ammonia nitrogen and the total nitrogen of the effluent are difficult to reach the standard, so that the removal efficiency and the effect of the system are affected. Therefore, further treatment is required for the remaining nitrogen. In addition, part of anaerobic ammonia oxidation particles and fallen biological films in the anaerobic ammonia oxidation pond can enter a sedimentation tank along with the effluent of the anaerobic ammonia oxidation pond, and how to intercept and utilize anaerobic ammonia oxidation bacteria with higher biological activity in the part is also a problem to be solved in the popularization and application of the anaerobic ammonia oxidation technology at present.
Disclosure of Invention
The invention aims to provide a denitrification device and a denitrification method applied to a sedimentation tank of an anaerobic ammonia oxidation system, which solve the problems that ammonia nitrogen in effluent of the sedimentation tank of the anaerobic ammonia oxidation system is difficult to control, standard stability is difficult to ensure and anaerobic ammonia oxidation bacteria are lost.
In order to achieve the aim, in a first aspect, the invention provides a denitrification device applied to a sedimentation tank of an anaerobic ammonia oxidation system, which comprises an upper anaerobic ammonia oxidation composite biological filler component, a lower anaerobic ammonia oxidation composite biological filler component and a water outlet interception net;
the upper anaerobic ammonia oxidation composite biological filler component and the lower anaerobic ammonia oxidation composite biological filler component are arranged in the vertical flow sedimentation tank at intervals from top to bottom, and the water outlet interception net is arranged at a water outlet of the vertical flow sedimentation tank;
the upper anaerobic ammonia oxidation composite biological filler assembly comprises a plurality of upper transverse fixing rods which are arranged at intervals along the horizontal direction, and a plurality of groups of movable composite biological filler ball strings are arranged on each upper transverse fixing rod at intervals;
the lower anaerobic ammonia oxidation composite biological filler assembly comprises a plurality of lower transverse fixing rods which are arranged at intervals along the horizontal direction, and a plurality of groups of fixed composite biological filler ball strings are arranged on each lower transverse fixing rod at intervals;
each set of movable composite bio-filler ball strings includes a plurality of filler balls longitudinally connected in series.
Optionally, the volume filling ratio of the movable composite bio-filler ball string and the fixed composite bio-filler ball string relative to the total volume of the vertical flow sedimentation tank is 5% -10%.
Optionally, the top end of the movable composite bio-filler ball string is detachably connected with the upper transverse fixing rod;
the top end of the fixed composite biological filler ball string is fixedly connected with the lower-layer transverse fixing rod.
Optionally, the distance between the movable composite bio-filler ball string and the plurality of filler balls on the fixed composite bio-filler ball string is 5cm.
Optionally, the filler balls are plastic spherical fillers, and the diameters of the filler balls are 100mm-200mm;
a plurality of the packing balls are longitudinally connected in series through a connecting piece.
Optionally, the pore diameter of the water outlet interception net is 200 μm.
Optionally, the upper layer transverse fixing rod and the lower layer transverse fixing rod are I-steel, and two ends of the I-steel are fixedly connected with the inner wall of the vertical flow sedimentation tank.
In a second aspect, the present invention provides a denitrification method applied to a sedimentation tank of an anaerobic ammonia oxidation system, using the denitrification device applied to the sedimentation tank of the anaerobic ammonia oxidation system in the first aspect, the method comprising:
the ammonia nitrogen concentration range of the effluent of the anaerobic ammonia oxidation reaction tank is controlled to be 20mg/L-200mg/L, and the nitrite concentration range is controlled to be 10mg/L-80mg/L, so that the effluent of the anaerobic ammonia oxidation reaction tank is suitable for the growth of anaerobic ammonia oxidation bacteria;
Controlling the anaerobic ammonia oxidation reaction tank to continuously and stably discharge water, enriching and attaching anaerobic ammonia oxidation bacteria in the vertical flow sedimentation tank to grow on the filling balls for autotrophic denitrification reaction when the water discharge mixed liquid of the anaerobic ammonia oxidation reaction tank flows into the vertical flow sedimentation tank, and completing a denitrification starting stage when the anaerobic ammonia oxidation bacteria biomembrane is gradually formed on the movable composite biological filling ball strings and the fixed composite biological filling ball strings;
After the starting stage is completed, continuously controlling the nitrite nitrogen concentration range of the effluent of the anaerobic ammonia oxidation reaction tank to be 10mg/L-80mg/L, so that the system enters a normal denitrification operation stage;
the falling biological membranes and particles trapped by the water outlet trapping net are cleaned regularly and are added into the anaerobic ammonia oxidation reaction tank.
Optionally, the denitrification method is applied to continuous flow integrated high ammonia nitrogen wastewater anaerobic ammonia oxidation denitrification or continuous flow two-stage high ammonia nitrogen wastewater anaerobic ammonia oxidation denitrification;
wherein the high ammonia nitrogen wastewater comprises wastewater with ammonia nitrogen concentration higher than 100 mg/L.
The invention has the beneficial effects that:
According to the denitrification device applied to the sedimentation tank of the anaerobic ammonia oxidation system, the upper-layer and lower-layer anaerobic ammonia oxidation composite biological filler ball strings are arranged in the vertical flow sedimentation tank of the anaerobic ammonia oxidation system, NH 4 + -N and NO 2 - -N can be provided as matrixes required by growth of anaerobic ammonia oxidation bacteria through the effluent of the front-end anaerobic ammonia oxidation tank to enrich the anaerobic ammonia oxidation bacteria, autotrophic denitrification reaction can be carried out on the anaerobic ammonia oxidation composite biological filler in the sedimentation tank after the effluent of the anaerobic ammonia oxidation tank enters the sedimentation tank after enrichment is completed, the denitrification device can continuously enrich the anaerobic ammonia oxidation bacteria, meanwhile, the shed anaerobic ammonia oxidation biological film and granular sludge wrapped in the effluent of the anaerobic ammonia oxidation tank can be attached to the filler, the sedimentation function of the sedimentation tank cannot be influenced, in addition, the interception net (aperture 200 mu m) matched with the water outlet of the sedimentation tank can effectively intercept the shed biological film on the anaerobic ammonia oxidation composite biological filler, and release the loss of the anaerobic ammonia oxidation bacteria.
Furthermore, by introducing the denitrification device and the method applied to the sedimentation tank of the anaerobic ammonia oxidation system in situ, the control range of ammonia nitrogen in the effluent of the anaerobic ammonia oxidation process of the high ammonia nitrogen sewage is more flexible, the system is optimized, the denitrification performance is further improved, the treatment pressure of a subsequent treatment section is reduced, and the effluent quality of the anaerobic ammonia oxidation treatment system can reach the wastewater quality standard of sewage discharge into town sewage (GB/T31962-2015).
The system of the present invention has other features and advantages which will be apparent from or are set forth in detail in the accompanying drawings and the following detailed description, which are incorporated herein, and which together serve to explain certain principles of the invention.
Drawings
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular descriptions of exemplary embodiments of the invention as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the invention.
Fig. 1 shows a top view of a denitrification device applied to a settling tank of an anaerobic ammonium oxidation system according to embodiment 1 of the present invention.
FIG. 2 is a sectional view of a denitrification apparatus applied to a sedimentation tank of an anaerobic ammonium oxidation system according to embodiment 1 of the present invention along the direction I-I in FIG. 1.
FIG. 3 shows a cross-sectional view of a denitrification device applied to a sedimentation tank of an anaerobic ammonium oxidation system according to the present invention along the direction II-II in FIG. 1.
Detailed Description
The invention will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present invention are illustrated in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Example 1
1-3, The invention provides a denitrification device applied to a sedimentation tank of an anaerobic ammonia oxidation system, which comprises an upper layer anaerobic ammonia oxidation composite biological filler component, a lower layer anaerobic ammonia oxidation composite biological filler component and a water outlet interception net 6;
the upper anaerobic ammonia oxidation composite biological filler component and the lower anaerobic ammonia oxidation composite biological filler component are arranged in the vertical flow sedimentation tank 1 at intervals up and down, and the water outlet interception net 6 is arranged at the water outlet of the vertical flow sedimentation tank 1;
The upper anaerobic ammonia oxidation composite biological filler assembly comprises a plurality of upper transverse fixed rods 2 which are arranged at intervals along the horizontal direction, and a plurality of groups of movable composite biological filler ball strings 3 are arranged on each upper transverse fixed rod 2 at intervals;
The lower anaerobic ammonia oxidation composite biological filler assembly comprises a plurality of lower transverse fixing rods 4 which are arranged at intervals along the horizontal direction, and a plurality of groups of fixed composite biological filler ball strings 5 are arranged on each lower transverse fixing rod 4 at intervals;
Each set of movable composite bio-filler strings 3 and each set of stationary composite bio-filler strings 5 comprises a plurality of filler balls connected together in series in the longitudinal direction.
Preferably, the top end of the movable composite bio-filler ball string 3 is detachably connected with the upper layer transverse fixing rod 2, and the top end of the fixed composite bio-filler ball string 5 is fixedly connected with the lower layer transverse fixing rod 4.
Preferably, the volume filling ratio of the movable composite biological filling ball string 3 and the fixed composite biological filling ball string 5 relative to the total volume of the vertical flow sedimentation tank 1 is 5% -10%, the distance between a plurality of filling balls on the movable composite biological filling ball string 3 and the fixed composite biological filling ball string 5 is 5cm, the filling balls are plastic spherical filling materials, the diameters of the filling balls are 100mm-200mm, and a plurality of filling balls are longitudinally connected in series through connecting pieces.
Specifically, in this embodiment, the movable composite bio-filler ball string 3 is hung on the upper transverse fixing rod 2 through a steel hook, and can be disassembled and assembled on the pool of the vertical sedimentation tank 1, the fixed composite bio-filler ball string 5 is fixedly bound on the lower transverse fixing rod 4 through a steel wire, the upper transverse fixing rod 2 and the lower transverse fixing rod 4 are i-shaped steel, and two ends of the i-shaped steel are fixedly connected with the inner wall of the vertical sedimentation tank 1. In the movable composite biological filling ball strings 3 and the fixed composite biological filling ball strings 5, the space between filling balls in each group of filling ball strings is 5cm, and the volume filling ratio of the filling ball strings relative to the total volume of the vertical sedimentation tank 1 can be controlled to be 5% -10% by adjusting the number of the filling balls in each group of filling ball strings and the number of the filling ball strings hung on the upper and lower layers of the transverse fixing rods 4. The movable composite biological filling ball strings 3 and the fixed composite biological filling ball strings 5 are respectively composed of plastic spherical fillers with diameters of 100-200mm and are longitudinally connected in series through stainless steel bars. The water outlet interception net 6 is arranged at the water outlet of the vertical flow sedimentation tank 1, and the aperture is 200 mu m.
Example 2
The embodiment provides a denitrification method applied to a sedimentation tank of an anaerobic ammonia oxidation system, and the denitrification device applied to the sedimentation tank of the anaerobic ammonia oxidation system according to embodiment 1 is utilized, and the method comprises the following steps:
the ammonia nitrogen concentration and the nitrite concentration of the effluent of the anaerobic ammonia oxidation reaction tank are controlled within a set concentration range, so that the effluent of the anaerobic ammonia oxidation reaction tank is suitable for the growth of anaerobic ammonia oxidation bacteria;
controlling the anaerobic ammonia oxidation reaction tank to continuously and stably discharge water, when the water discharge mixed solution of the anaerobic ammonia oxidation reaction tank flows into the vertical flow sedimentation tank 1, the anaerobic ammonia oxidation bacteria are enriched in the vertical flow sedimentation tank 1 and are attached to the filling balls for growth to perform autotrophic denitrification reaction, and when the anaerobic ammonia oxidation bacteria biological film is gradually formed on the movable composite biological filling ball strings 3 and the fixed composite biological filling ball strings 5, the system completes the denitrification starting stage;
after the starting stage is completed, continuously controlling the nitrite nitrogen concentration of the effluent of the anaerobic ammonia oxidation reaction tank to be in a set concentration range, so that the system enters a normal denitrification operation stage;
the falling biological membranes and particles trapped by the water-out trapping net 6 are cleaned regularly and are added into the anaerobic ammonia oxidation reaction tank.
Specifically, the method of this embodiment is based on the denitrification device applied to the sedimentation tank of the anaerobic ammonia oxidation system of embodiment 1, the denitrification device applied to the sedimentation tank of the anaerobic ammonia oxidation system of embodiment 1 is installed in the vertical flow sedimentation tank 1 of the anaerobic ammonia oxidation treatment system, that is, an upper layer anaerobic ammonia oxidation composite biological filler component and a lower layer anaerobic ammonia oxidation composite biological filler component are installed in the vertical flow sedimentation tank 1 in advance, and a interception net is installed at the water outlet of the vertical flow sedimentation tank 1. The vertical flow sedimentation tank 1 is connected with the water outlet pipeline of the prefrontal anaerobic ammoxidation reaction tank. The activated sludge, the shed biological film and the granular sludge which enter the vertical flow sedimentation tank 1 coexist with the biological film which is attached and grown on the movable composite biological filling ball strings 3 and the fixed composite biological filling ball strings 5, and are interdependent and do not interfere with each other in space distribution.
The denitrification method comprises the following two processes:
(1) The anaerobic ammonia oxidation biomembrane enrichment growth period comprises the steps of controlling the ammonia nitrogen concentration rho (NH 4 + -N) and the nitrite nitrogen concentration rho (NO 2 - -N) of the effluent of a precursor anaerobic ammonia oxidation pond to be in a set concentration range, wherein the ammonia nitrogen concentration rho (NH 4 + -N) is preferably 20mg/L to 200mg/L, the nitrite nitrogen concentration rho (NO 2 - -N) is preferably 10mg/L to 80mg/L, ensuring that the anaerobic ammonia oxidation pond continuously stabilizes the effluent, and when the effluent mixed solution of the anaerobic ammonia oxidation pond flows into a sedimentation tank automatically, anaerobic ammonia oxidation bacteria in floc sludge can be enriched by using ammonia nitrogen and nitrite as matrixes and attached and grown on a suspended biological filler ball string, and anaerobic ammonia oxidation granular sludge and biomembrane entering the sedimentation tank can be trapped by a filler and further attached and grown. After a period of culture, the surface of the filler in the sedimentation tank is obviously adhered with a brick red anaerobic ammonia oxidation bacteria biological film;
(2) And the stable operation stage of the denitrification device is that after the steps are carried out, an anaerobic ammonia oxidation biomembrane is formed on the movable composite biological filler ball string 3 and the fixed composite biological filler ball string 5 of the vertical flow sedimentation tank 1, the device starting stage is finished, and then the nitrite nitrogen concentration of the effluent of the front-stage anaerobic ammonia oxidation tank is continuously controlled to be less than or equal to 10mg/L and less than or equal to rho (NO 2 - -N) and less than or equal to 80mg/L, and the whole denitrification device can enter the normal operation stage. Thereafter, the operator only needs to clean the falling biological film and particles trapped by the water-out trapping net 6 at regular intervals and throw the falling biological film and particles into the pre-anaerobic ammonia oxidation tank.
The denitrification method of the embodiment can be applied to continuous flow integrated high ammonia nitrogen wastewater anaerobic ammonia oxidation denitrification or continuous flow two-stage high ammonia nitrogen wastewater anaerobic ammonia oxidation denitrification. Wherein the high ammonia nitrogen wastewater contains wastewater with ammonia nitrogen concentration higher than 100mg/L, such as sludge digestive juice, cultivation wastewater, landfill leachate and the like.
The invention is further described below by means of an application example.
The water quality of the high ammonia nitrogen wastewater obtained by performing anaerobic ammoxidation on the sludge pyrolysis digestive juice of the regeneration water plant of Beijing Xiaohangmen is shown in table 1.
TABLE 1 quality of high Ammonia-nitrogen wastewater
Note that the index units are mg/L
After the high ammonia nitrogen wastewater is treated by the front-end process of the anaerobic ammonia oxidation engineering of the sludge thermal hydrolysis digestive fluid of the small red gate regenerated water plant, the effluent of the anaerobic ammonia oxidation pond flows into the sedimentation pond of the anaerobic ammonia oxidation system by gravity flow, and the water quality is shown in table 2.
TABLE 2 wastewater quality entering anaerobic ammonia oxidation system sedimentation tank
Note that the index units are mg/L;
according to the denitrification method, the sewage is subjected to denitrification treatment, and the method concretely comprises the following steps:
s1, controlling ammonia nitrogen concentration (rho (NH 4 + -N) which is less than or equal to 30.6mg/L and less than or equal to 172 mg/L) of effluent of the precursor anaerobic ammonia oxidation tank, and nitrite nitrogen concentration (rho (NO 2 - -N) which is less than or equal to 10.3mg/L and less than or equal to 45.8 mg/L), wherein the project can continuously ensure stable effluent of the anaerobic ammonia oxidation tank. The denitrification device applied to the anaerobic ammonia oxidation system sedimentation tank is arranged in the vertical flow sedimentation tank 1, wherein the volume filling ratio of the movable composite biological filler ball string 3 to the fixed composite biological filler ball string 5 is 7% compared with that of the effective volume of the vertical flow sedimentation tank 1, a interception net (aperture 200 mu m) is arranged at the water outlet of the vertical flow sedimentation tank 1, when the effluent mixed solution flows into the sedimentation tank from the inflow tank, anaerobic ammonia oxidation bacteria in the floc sludge are enriched by using ammonia nitrogen and nitrite nitrogen in the mixed solution as matrixes, and are attached and grown on the suspended blank biological filler ball string, and obvious brick red anaerobic ammonia oxidation bacteria biological membranes are attached on the surface of filler in the sedimentation tank after cultivation for about 2 months;
S2, after the steps, an anaerobic ammonia oxidation biomembrane is formed on the movable composite biological filler ball string 3 and the fixed composite biological filler ball string 5 of the sedimentation tank, the starting stage of the device is finished, the nitrite nitrogen concentration (rho (NO 2 - -N) of the effluent of the precursor anaerobic ammonia oxidation tank is continuously controlled to be less than or equal to 15.5mg/L and less than or equal to 42.4 mg/L), and the whole device enters a normal operation stage. Thereafter, the operator cleans the falling biofilm and particles trapped by the water-retaining net 6 every week and feeds the same into the pre-anaerobic ammonia oxidation tank.
The detection result shows that after the denitrification device applied to the sedimentation tank of the anaerobic ammonia oxidation system runs stably, the average ammonia nitrogen concentration (NH 4 + -N) of the sedimentation tank is 54.3mg/L, the average nitrite nitrogen concentration (NO 2 -N) of the sedimentation tank is 26.6mg/L, the average Total Nitrogen (TN) concentration of the sedimentation tank is 107.9mg/L, and the TN concentration of the sedimentation tank is reduced by 10.5%.
In summary, the anaerobic ammonia oxidation composite biological filler is inoculated in a vertical flow sedimentation tank of an anaerobic ammonia oxidation system, NH 4 + -N and NO 2 - -N are provided as matrixes necessary for growth of anaerobic ammonia oxidation bacteria through effluent of the anaerobic ammonia oxidation tank, the anaerobic ammonia oxidation bacteria are enriched, after enrichment is completed, the effluent of the anaerobic ammonia oxidation tank enters the sedimentation tank, and autotrophic denitrification reaction is carried out on the anaerobic ammonia oxidation composite biological filler. The upper and lower layers of filler ball strings can continuously enrich anaerobic ammonia oxidation bacteria, meanwhile, the falling anaerobic ammonia oxidation biological film and granular sludge wrapped in the effluent of the anaerobic ammonia oxidation tank can be attached to the filler, the precipitation function of the precipitation tank can not be affected, in addition, the interception net matched with the water outlet of the precipitation tank can effectively intercept the biological film falling off on the anaerobic ammonia oxidation composite biological filler, and the loss of the anaerobic ammonia oxidation bacteria is relieved. By introducing the denitrification device and the method applied to the sedimentation tank of the anaerobic ammonia oxidation system in situ, the control range of the ammonia nitrogen in the effluent of the anaerobic ammonia oxidation process of the high ammonia nitrogen sewage is more flexible, the system is optimized, the denitrification performance is further improved, the treatment pressure of the subsequent treatment working section is reduced, and the water quality of the power-assisted effluent reaches the wastewater quality standard of sewage discharge into town sewer (GB/T31962-2015).
The scheme of the invention has the advantages that:
(1) The ammonia nitrogen and nitrite nitrogen in the effluent of the anaerobic ammonia oxidation pond are utilized to culture anaerobic ammonia oxidation strains for deep denitrification in the vertical flow sedimentation pond, so that the load is increased, and the effluent ammonia nitrogen and total nitrogen are further reduced;
(2) Intercepting the strain of the effluent of the anaerobic ammoxidation tank, and reducing the loss;
(3) The condition that the ammonia nitrogen in the effluent of the anaerobic ammonia oxidation pond is too low to cause over-aeration is prevented in order to reach the emission standard, so that the activity of anaerobic ammonia oxidation bacteria is inhibited;
(4) The deep denitrification technology and the device in the sedimentation tank are convenient to manage and maintain, and the occupied area is not required to be additionally increased, and the operation is low in energy consumption.
The foregoing description of embodiments of the invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described.
Claims (6)
1. The denitrification device applied to the sedimentation tank of the anaerobic ammonia oxidation system is characterized by comprising an upper anaerobic ammonia oxidation composite biological filler component, a lower anaerobic ammonia oxidation composite biological filler component and a water outlet interception net;
the upper layer anaerobic ammonia oxidation composite biological filler component and the lower layer anaerobic ammonia oxidation composite biological filler component are arranged in the vertical flow sedimentation tank at intervals up and down, the water outlet interception net is arranged at the water outlet of the vertical flow sedimentation tank, NH 4 + -N and NO 2 - -N are provided by the water outlet of the prefrontal anaerobic ammonia oxidation tank as matrixes necessary for the growth of anaerobic ammonia oxidation bacteria to enrich the anaerobic ammonia oxidation bacteria, after enrichment is completed, the water outlet of the anaerobic ammonia oxidation tank enters the vertical flow sedimentation tank, and autotrophic denitrification reaction is carried out on the anaerobic ammonia oxidation composite biological filler;
the upper anaerobic ammonia oxidation composite biological filler assembly comprises a plurality of upper transverse fixing rods which are arranged at intervals along the horizontal direction, and a plurality of groups of movable composite biological filler ball strings are arranged on each upper transverse fixing rod at intervals;
the lower anaerobic ammonia oxidation composite biological filler assembly comprises a plurality of lower transverse fixing rods which are arranged at intervals along the horizontal direction, and a plurality of groups of fixed composite biological filler ball strings are arranged on each lower transverse fixing rod at intervals;
Each group of movable composite biological filling ball strings and each group of fixed composite biological filling ball strings comprise a plurality of filling balls which are connected in series along the longitudinal direction;
The volume filling ratio of the movable composite biological filling ball strings and the fixed composite biological filling ball strings relative to the total volume of the vertical flow sedimentation tank is 5-10%;
The top end of the movable composite biological filling ball string is detachably connected with the upper transverse fixing rod;
the top end of the fixed composite biological filler ball string is fixedly connected with the lower-layer transverse fixing rod;
the upper layer transverse fixing rod and the lower layer transverse fixing rod are I-steel, and two ends of the I-steel are fixedly connected with the inner wall of the vertical flow sedimentation tank.
2. The denitrification device for use in a sedimentation tank of an anaerobic ammonium oxidation system according to claim 1, wherein the distance between the movable composite bio-filler ball string and the plurality of filler balls on the fixed composite bio-filler ball string is 5cm.
3. The denitrification device applied to a sedimentation tank of an anaerobic ammonia oxidation system according to claim 1, wherein the filler balls are plastic spherical fillers, and the diameters of the filler balls are 100mm-200mm;
a plurality of the packing balls are longitudinally connected in series through a connecting piece.
4. The denitrification device for use in a sedimentation tank of an anaerobic ammonium oxidation system according to claim 1, wherein the pore size of the water-retaining net is 200 μm.
5. A denitrification method applied to a sedimentation tank of an anaerobic ammonia oxidation system, using the denitrification device applied to a sedimentation tank of an anaerobic ammonia oxidation system according to any one of claims 1 to 4, characterized in that the method comprises:
the ammonia nitrogen concentration range of the effluent of the anaerobic ammonia oxidation reaction tank is controlled to be 20mg/L-200mg/L, and the nitrite concentration range is controlled to be 10mg/L-80mg/L, so that the effluent of the anaerobic ammonia oxidation reaction tank is suitable for the growth of anaerobic ammonia oxidation bacteria;
Controlling the anaerobic ammonia oxidation reaction tank to continuously and stably discharge water, enriching and attaching anaerobic ammonia oxidation bacteria in the vertical flow sedimentation tank to grow on the filling balls for autotrophic denitrification reaction when the water discharge mixed liquid of the anaerobic ammonia oxidation reaction tank flows into the vertical flow sedimentation tank, and completing a starting stage of the system when the anaerobic ammonia oxidation bacteria biomembrane is gradually formed on the movable composite biological filling ball strings and the fixed composite biological filling ball strings;
After the starting stage is completed, continuously controlling the nitrite nitrogen concentration range of the effluent of the anaerobic ammonia oxidation reaction tank to be 10mg/L-80mg/L, so that the system enters a normal operation stage;
the falling biological membranes and particles trapped by the water outlet trapping net are cleaned regularly and are added into the anaerobic ammonia oxidation reaction tank.
6. The denitrification method applied to a sedimentation tank of an anaerobic ammonia oxidation system according to claim 5, wherein the denitrification method is applied to continuous flow integrated type high ammonia nitrogen wastewater anaerobic ammonia oxidation denitrification or continuous flow two-stage type high ammonia nitrogen wastewater anaerobic ammonia oxidation denitrification;
wherein the high ammonia nitrogen wastewater is wastewater with ammonia nitrogen concentration higher than 100 mg/L.
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| CN219079234U (en) * | 2022-10-27 | 2023-05-26 | 同济大学建筑设计研究院(集团)有限公司 | Advanced ammonia nitrogen removal system utilizing secondary sedimentation tank coupled biological membrane |
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| CN203530018U (en) * | 2013-11-06 | 2014-04-09 | 北京城市排水集团有限责任公司 | Anaerobic ammonium oxidation biological stuffing device |
| CN219079234U (en) * | 2022-10-27 | 2023-05-26 | 同济大学建筑设计研究院(集团)有限公司 | Advanced ammonia nitrogen removal system utilizing secondary sedimentation tank coupled biological membrane |
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