CN113845219B - Device for stably realizing shortcut nitrification anaerobic ammonia oxidation process - Google Patents
Device for stably realizing shortcut nitrification anaerobic ammonia oxidation process Download PDFInfo
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- CN113845219B CN113845219B CN202110989960.5A CN202110989960A CN113845219B CN 113845219 B CN113845219 B CN 113845219B CN 202110989960 A CN202110989960 A CN 202110989960A CN 113845219 B CN113845219 B CN 113845219B
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- ammonia oxidation
- anaerobic ammonia
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 142
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 73
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 71
- 230000003647 oxidation Effects 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 37
- 230000008569 process Effects 0.000 title claims abstract description 36
- 238000006243 chemical reaction Methods 0.000 claims abstract description 211
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 119
- 239000010865 sewage Substances 0.000 claims abstract description 84
- 230000007246 mechanism Effects 0.000 claims abstract description 54
- 239000000945 filler Substances 0.000 claims abstract description 40
- 238000005192 partition Methods 0.000 claims abstract description 8
- 238000012856 packing Methods 0.000 claims description 23
- 230000000813 microbial effect Effects 0.000 claims description 21
- 238000005273 aeration Methods 0.000 claims description 16
- 230000009471 action Effects 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 2
- 238000003475 lamination Methods 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000008439 repair process Effects 0.000 abstract description 3
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 15
- 239000000725 suspension Substances 0.000 description 11
- 244000005700 microbiome Species 0.000 description 10
- 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 8
- 239000010802 sludge Substances 0.000 description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 241000894006 Bacteria Species 0.000 description 6
- 241001453382 Nitrosomonadales Species 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 239000002351 wastewater Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000006396 nitration reaction Methods 0.000 description 4
- 239000002957 persistent organic pollutant Substances 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000001651 autotrophic effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000002503 metabolic effect Effects 0.000 description 2
- 230000001546 nitrifying effect Effects 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 1
- 238000005276 aerator Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012765 fibrous filler Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 241001148471 unidentified anaerobic bacterium Species 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
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a device for stably realizing a shortcut nitrification anaerobic ammonia oxidation process. The device mainly comprises a shell, a partition plate, a filling frame, a load limiting mechanism and a wave plate: the baffle divides the closed accommodating space of the shell into a water inlet pump chamber, a COD removal reaction chamber, a shortcut nitrification reaction chamber, a wave plate chamber and an anaerobic ammonia oxidation reaction chamber; the filler frame is arranged in the COD removal reaction chamber; the load limiting mechanism is arranged in the short-cut nitrification reaction chamber; the wave plate is arranged in the wave plate chamber, and the wave plate communicates the shortcut nitrification reaction chamber with the anaerobic ammonia oxidation reaction chamber; when sewage is treated, external sewage enters the water inlet pump chamber from the water inlet of the device, then flows through the COD removal reaction chamber, the shortcut nitrification reaction chamber, the wave plate chamber and the anaerobic ammonia oxidation reaction chamber in sequence, and the treated clean water flows out from the water outlet of the device. When sewage is treated, the invention can improve the performance and the operation stability of the reactor, simplify the sewage treatment process and reduce the maintenance and repair times of equipment.
Description
Technical Field
The invention belongs to the technical field of environmental protection and chemical industry, and particularly relates to a device for stably realizing a shortcut nitrification anaerobic ammonia oxidation process.
Background
Anaerobic ammoxidation (anaerobic ammonium oxidation, ANAMMOX) is taken as a shortcut reaction of nitrifying and denitrifying, breaks through the basic theory of traditional nitrifying and denitrifying, shortens the reaction path, can save the cost expenditure caused by the operation of adding external carbon sources, chemical neutralizers and the like, and is always considered as an efficient, economic and sustainable denitrification path. The anaerobic ammonia oxidation denitrification has the technical advantages that: 1) The denitrification efficiency is high, the sludge quantity is the same, and the anaerobic ammonia oxidation can be improved by more than a plurality of times compared with the denitrification load of the traditional nitrification-denitrification under the same volume; 2) The aeration energy consumption is low, and the anaerobic ammonia oxidation is to remove ammonia nitrogen and nitrate nitrogen in an anaerobic state. Therefore, only part of ammonia nitrogen in the sewage is oxidized into nitrite nitrogen, and the requirement of the denitrification process can be met; 3) The sludge yield is low, and is far lower than that of the traditional nitrification-denitrification and other denitrification processes because the anaerobic ammonia oxidation is an autotrophic denitrification process; 4) The method has the advantages that no additional carbon source is needed, the traditional denitrification process needs to supplement the carbon source to meet the denitrification process for wastewater with lower C/N, the anaerobic ammonia oxidizing bacteria are used as autotrophic bacteria, the additional carbon source is not needed, and the carbon consumption of the whole system is far smaller than that of the traditional denitrification process.
Because of the technical characteristics of anaerobic ammonia oxidation and denitrification, the anaerobic ammonia oxidation-based process is coupled with short-range nitration reaction (partial nitrification, PN) to partially convert ammonia nitrogen in wastewater into nitrite nitrogen, and the coupling modes are mainly divided into two modes: the two-stage separation or establishment of a single-stage short-cut nitrification-anaerobic ammonia oxidation system. For the main flow sewage treatment of most low ammonia nitrogen, the stability of the short-cut nitrification-anaerobic ammonia oxidation process is easily damaged by the lower ammonia nitrogen concentration, so that the stability of the existing denitrification process based on anaerobic ammonia oxidation is poor, the impact resistance is low, and the low-concentration ammonia nitrogen wastewater is difficult to effectively treat.
Therefore, how to effectively combine the shortcut nitrification process and the anaerobic ammonia oxidation process and improve the stability of the shortcut nitrification-anaerobic ammonia oxidation process becomes a main technical problem of the engineering application.
Disclosure of Invention
In order to solve the technical problems, the invention provides a device for stably realizing a shortcut nitrification anaerobic ammonia oxidation process, which mainly comprises a shell, a partition plate, a filling frame, a load limiting mechanism and a wave plate;
The baffle divides the closed accommodating space of the shell into a water inlet pump chamber, a COD removal reaction chamber, a shortcut nitrification reaction chamber, a wave plate chamber and an anaerobic ammonia oxidation reaction chamber;
the packing rack is arranged in the COD removal reaction chamber;
the load limiting mechanism is arranged in the short-cut nitrification reaction chamber and is used for limiting the movement of the microbial filler;
the wave plate is arranged in the wave plate chamber, and the wave plate communicates the short-cut nitrification reaction chamber with the anaerobic ammonia oxidation reaction chamber;
When sewage is treated, external sewage enters the water inlet pump chamber from the water inlet of the device, then flows through the COD removal reaction chamber, the short-cut nitrification reaction chamber, the wave plate chamber and the anaerobic ammonia oxidation reaction chamber in sequence, and the treated clean water is discharged from the water outlet of the device.
Preferably, the filling rack is a cuboid or a polyhedron, a plurality of rib plates are arranged in the filling rack, and different rib plates are arranged in parallel along the vertical direction.
Preferably, the cross section of each rib plate in the horizontal direction is S-shaped, and the distance between two adjacent rib plates is 0.1-5cm.
Preferably, the lower end of the packing frame is fixed on a packing frame bracket, and the packing frame bracket is fixed at the bottom of the COD removal reaction chamber.
Preferably, the height of the bottom end of the packing frame from the bottom of the COD removal reaction chamber is 45-55% of the total height of the COD removal reaction chamber.
Preferably, the load limiting mechanism is mounted on a load limiting mechanism support, the load limiting mechanism support is fixed at the bottom of the short-range nitration reaction chamber, and the load limiting mechanism can move up and down along the load limiting mechanism support under the action of a transmission mechanism.
Preferably, the load limiting mechanism comprises at least one perforated plate, the inner diameter of the holes is less than 30% of the outer diameter of the microbial filler, and the density of the plate is 950-1050 kg/m 3.
Preferably, the wave plate is at least provided with one layer, one end of the wave plate is connected with the water outlet of the short-range nitration reaction chamber, and the other end of the wave plate is connected with the water inlet of the anaerobic ammonia oxidation reaction chamber;
when the number of layers of the wave plates is more than or equal to 2, the wave plates are distributed in an up-down lamination mode, and the head and the tail of the adjacent upper layer and the lower layer of the wave plates are connected, so that all the wave plates are connected in series to form a sewage flowing channel.
Preferably, an aeration device and an online DO detection device are arranged at the bottom of the short-cut nitrification reaction chamber.
Preferably, a toothed microorganism filler bracket is arranged at the upper part of the anaerobic ammonia oxidation reaction chamber, microorganism filler can be hung between two adjacent toothed protrusions, and a counterweight is arranged at the bottom of the microorganism filler.
The beneficial effects of the invention are as follows:
in the first aspect, in the COD removal reaction chamber, a packing frame with a unique structure is arranged in a unique arrangement mode, and the treatment of organic pollutants in a water body is realized through microbial packing on the packing frame, so that redundant sludge is prevented from entering a short-cut nitrification unit.
In the second aspect, the distribution state of microbial fillers can be adjusted through the load limiting mechanism in the short-cut nitrification reaction chamber, so that the short-cut nitrification efficiency can be freely adjusted and matched with the regulation and control of on-line dissolved oxygen, the short-cut nitrification reaction system can adapt to the impact of pollutants with different concentrations, and a stable short-cut nitrification treatment effect is obtained.
In the third aspect, the wave plate arranged in the wave chamber can well limit the influence of the short-cut nitrification unit on the flora structure of the anaerobic ammonia oxidation unit, effectively reduce the impact of a small amount of dissolved oxygen on the anaerobic ammonia oxidation unit, improve the microbial activity of anaerobic ammonia oxidation bacteria, and ensure the purity and the running stability of the anaerobic ammonia oxidation bacteria.
In the fourth aspect, the dentate microorganism filler bracket arranged at the top of the anaerobic ammonia oxidation reaction chamber is provided with dentate bulges, fillers of anaerobic ammonia oxidation bacteria can be hung between adjacent bulges, and the distance between the fillers can be adjusted according to the needs, so that the enrichment effect of the anaerobic ammonia oxidation bacteria and the efficiency of anaerobic ammonia oxidation reaction are improved.
In a word, the above four unique structures effectively improve the running stability of the system, improve the performance of the reactor, simplify the sewage treatment process, improve the treatment efficiency, and simultaneously reduce the maintenance and repair times of the equipment caused by equipment blockage.
Drawings
FIG. 1 is a schematic plan view of a device for stably implementing a shortcut nitrification anaerobic ammonia oxidation process in accordance with the present invention;
The labels for the various parts in the figures are as follows: 101-shell, 102-anaerobic ammoxidation reaction chamber, 103-water outlet, 104-water inlet pump, 105-water inlet pump, 106-water inlet pipe, 107-COD removal reaction chamber water inlet manifold, 108-COD removal reaction chamber water inlet branch pipe, 109-valve, 110-filler frame, 111-overflow pipe water inlet hole, 112-overflow pipe, 113-COD removal reaction chamber I, 114-COD removal reaction chamber II, 115-COD removal reaction chamber III, 116-short range nitrification reaction chamber water inlet manifold, 117-short range nitrification reaction chamber water inlet branch pipe, 118-load limiting mechanism opening, 119-load limiting mechanism flat plate, 120-short range nitrification reaction chamber I, 121-short range nitrification reaction chamber II, 122-short range nitrification reaction chamber III, 123-wave plate, 124-wave plate chamber, 125-anaerobic ammoxidation reaction chamber water inlet pipe, 126-mud pipe, 127-microorganism filler and 128-microorganism filler suspension frame.
FIG. 2 is a schematic view of a cross-sectional A-A structure of the present invention;
the labels for the various parts in the figures are as follows: 201-a filler rack bracket;
FIG. 3 is a schematic view of a B-B cross-sectional structure of the present invention;
the labels for the various parts in the figures are as follows: 301-aeration holes, 302-aeration device supports, 303-aeration devices and 304-load limiting mechanism supports;
FIG. 4 is a schematic top view of the rib in the packing rack of the present invention;
The labels for the various parts in the figures are as follows: 401-rib plates and 402-filler frame frames;
FIG. 5 is a schematic structural view of a dentate microbial packing stent of the present invention;
the labels for the various parts in the figures are as follows: 501-groove-shaped suspension brackets, 502-zigzag-shaped suspension brackets and 503-V-shaped suspension brackets.
Detailed Description
The following description will make clear and complete descriptions of the design of the embodiments of the present invention with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
According to the technical characteristics of sewage treatment by a short-cut nitrification-anaerobic ammonia oxidation process and the defects existing in the existing reaction equipment, the inventor designs a device for stably realizing the short-cut nitrification-anaerobic ammonia oxidation process, which is used for treating pollutants (such as sewage), can effectively improve the running stability of a system, improve the performance of a reactor, simplify the sewage treatment process, improve the treatment efficiency and reduce the equipment maintenance and repair times caused by equipment blockage.
The sewage treatment device mainly comprises a shell, a partition plate, a filling frame, a load limiting mechanism and a wave plate. The closed containing space inside the shell is divided into a water inlet pump chamber, a COD removing reaction chamber, a shortcut nitrification reaction chamber, a wave plate chamber and an anaerobic ammonia oxidation reaction chamber by a partition plate. When the device is used for treating sewage, the sewage is firstly conveyed into the pump of the water inlet pump chamber through the pipeline, and then conveyed into the COD removal reaction chamber under the pressure provided by the pump. On a filling frame in the COD removal reaction chamber, sewage fully contacts with facultative anaerobic microorganism filling, and organic pollutants in the sewage are decomposed by the action of facultative anaerobic microorganisms, so that the COD value of the sewage is reduced. The sewage treated by the COD removal reaction chamber enters a short-cut nitrification reaction chamber for further treatment, and in the short-cut nitrification reaction chamber, the sewage is fully contacted with an ammonia oxidation microorganism carrier borne by a load limiting mechanism, and the ammonia oxidation microorganism oxidizes ammonium nitrogen in the sewage into nitrite nitrogen through own metabolic activity. Then, sewage flows through the wave plate from the short-cut nitrification reaction chamber, and enters the anaerobic ammonia oxidation reaction chamber after buffering and sedimentation of the wave plate. In the anaerobic ammonia oxidation reaction chamber, anaerobic ammonia oxidation bacteria on anaerobic ammonia oxidation microbial fillers oxidize nitrite nitrogen in sewage into nitrogen, thereby completing the sewage treatment process. The treated clean water flows out of the sewage treatment device through a water outlet arranged on the anaerobic ammonia oxidation reaction chamber, and the whole sewage treatment process is finished.
FIG. 1 shows an embodiment of an apparatus for stably carrying out a short-range nitrification anaerobic ammonia oxidation process in accordance with the present invention. The closed space of the housing 101 is partitioned by a partition into a water inlet pump chamber 104, a first COD removal reaction chamber 113, a second COD removal reaction chamber 114, a third COD removal reaction chamber 115, a first shortcut nitrification reaction chamber 120, a second shortcut nitrification reaction chamber 121, a third shortcut nitrification reaction chamber 122, a wave plate chamber 124, and an anaerobic ammonia oxidation reaction chamber 102. The anaerobic ammonia oxidation reaction chamber 102 is positioned at the leftmost side of the sewage treatment device, and is adjacent to the water inlet pump chamber 104 and the wave plate chamber 124. The inlet pump chamber 104 is located below the wave plate chamber 124, separated by the same partition. The right side of the inlet pump chamber 104 is next to the COD removal reaction zone, which is comprised of three COD removal reaction chambers of identical construction. From the right partition of the water inlet pump chamber 104, a first COD removing reaction chamber 113, a second COD removing reaction chamber 114 and a third COD removing reaction chamber 115 are sequentially arranged. The right side wall of the COD removal reaction chamber three 115 is the housing 101. The short-cut nitrification reaction zone is arranged above the COD removal reaction zone and also comprises three short-cut nitrification reaction chambers with the same structure. The three short-cut nitrification reaction chambers are respectively in one-to-one correspondence with and are close to the three COD removal reaction chambers. Wherein, the short-cut nitrification reaction chamber III 122 corresponds to the COD removal reaction chamber I113, the short-cut nitrification reaction chamber II 121 corresponds to the COD removal reaction chamber II 114, and the short-cut nitrification reaction chamber I120 corresponds to the COD removal reaction chamber III 115. The left side of short-cut nitrification reaction chamber three 122 is immediately adjacent to the wave plate chamber 124.
As shown in fig. 1 and 2, a water inlet pump 105 is arranged in the water inlet pump chamber 104, and a water inlet of the water inlet pump 105 is communicated with an external sewage source through a water inlet pipe 106. The inlet tube 106 passes through an inlet opening in the outer side wall of the inlet pump chamber 104. The water outlet of the water inlet pump 105 is connected with one end of a COD removal reaction chamber water inlet manifold 107, water inlet branch pipes 108 leading to each COD removal reaction chamber are respectively arranged on the COD removal reaction chamber water inlet manifold 107, and the other end of the COD removal reaction chamber water inlet manifold 107 is connected with the water inlet branch pipe of the last COD removal reaction chamber. Valves 109 for controlling the flow direction of sewage are arranged on the COD removal reaction chamber water inlet manifold 107 and the COD removal reaction chamber water inlet branch pipes 108, and sewage to be treated can be provided for each COD removal reaction chamber respectively through opening or closing the valves 109. The top end of the water inlet branch pipe of the first COD removing reaction chamber 113 is connected with the water inlet main pipe 107 of the first COD removing reaction chamber, and the other end of the water inlet branch pipe is opened at the bottom of the first COD removing reaction chamber 113. The sewage in the water inlet manifold 107 can be introduced into the first COD removal reaction chamber 113 through the water inlet manifold of the first COD removal reaction chamber 113. The packing rack support 201 is installed at the bottom of the first COD removal reaction chamber 113, and the packing rack 110 is installed at the top end of the packing rack support 201, so that the packing rack 110 is suspended in the first COD removal reaction chamber 113. The height from the bottom end of the packing frame 110 to the bottom of the first COD removing reaction chamber 113 is preferably 45-55% of the total height of the first COD removing reaction chamber 113, so that the internal short flow and the dead zone of sewage flow of the first COD removing reaction chamber 113 are better prevented, and the COD removing efficiency is further improved. The packing support 110 is preferably a cuboid or a polyhedron, and a plurality of ribs 401 (see fig. 4) are arranged in parallel along the vertical direction, and the ribs 401 are fixed on a frame 402 of the packing support. The cross section of the rib 401 in the horizontal direction is preferably S-shaped, and the distance between two adjacent ribs 401 is preferably 0.1 to 5cm. The shape and arrangement mode of the rib plates enable the facultative anaerobic microorganism filler to be distributed in the filler frame at a certain angle, so that the contact area between sewage and facultative anaerobic bacteria is increased, and the degradation efficiency of organic pollutants is improved. Meanwhile, the S-shaped rib plates can also settle and entrap suspended microorganisms.
As shown in fig. 1 and 2, an overflow pipe 112 is arranged at the top of the right side of the first COD removal reaction chamber 113, an overflow pipe water inlet hole 111 is formed in the pipe wall of the overflow pipe 112, and sewage at the top of the first COD removal reaction chamber 113 is collected into the overflow pipe 112 through the overflow pipe water inlet hole 111. One end of the overflow pipe 112 is opened to the COD removing reaction chamber water inlet manifold 107, and the other end is a blind end. The sewage can sequentially enter the COD removal reaction chamber water inlet manifold 107, the COD removal reaction chamber water inlet branch pipe 108, the first COD removal reaction chamber 113, the overflow pipe 112 of the first COD removal reaction chamber and the COD removal reaction chamber water inlet manifold 107 through the valve 109 on the control pipeline, and then flows into the bottom of the second COD removal reaction chamber 114 through the water inlet branch pipe of the second COD removal reaction chamber 114. Similarly, the sewage treated by the second COD removing reaction chamber 114 flows into the bottom of the third COD removing reaction chamber 115, and further the conversion from ammonium nitrogen to nitrite nitrogen is carried out in the third COD removing reaction chamber 115, so that the COD value in the sewage is reduced.
It should be noted that the sewage treatment apparatus of the present invention is not limited to include one COD removal reaction chamber, and the number of COD removal reaction chambers may be selected according to the pollution condition and the treatment capacity of sewage, and one, two or more may be provided. During sewage treatment, the number of COD removal reaction chambers can be selected according to the treatment effect of the COD removal reaction chambers and by controlling the opening or closing of the COD removal reaction chamber water inlet manifold 107, the COD removal reaction chamber water inlet branch pipe 108 and the valve 109. When the number of the COD removing reaction chambers is more than or equal to 2, a serial passage for sewage treatment can be formed among the COD removing reaction chambers by controlling the valves 109 on the inlet manifold 107, the inlet branch pipe 108 and the overflow pipe 112 of the COD removing reaction chambers, so that the treatment time of facultative anaerobes on sewage is prolonged, organic pollutants in the sewage are degraded to the greatest extent, and the COD value in the sewage is reduced.
In one embodiment of the present invention, the valve 109 on the water inlet manifold 107 in the first COD removal reaction chamber 113 is closed, the water inlet manifold 108 and the overflow pipe 112 of the first COD removal reaction chamber 113 are opened, the external wastewater is treated in the first COD removal reaction chamber 113 and then flows into the water inlet manifold 107 in the upper portion of the second COD removal reaction chamber 114, at this time, the water inlet manifold in the second COD removal reaction chamber 114 is opened, and at the same time, the valve on the water inlet manifold 107 in the second COD removal reaction chamber 114 is closed, and the wastewater is continuously treated in the second COD removal reaction chamber 114. Then, an overflow pipe in the second COD removing reaction chamber 114 and a water inlet branch pipe of the third COD removing reaction chamber 115 are opened, sewage treated by the second COD removing reaction chamber 114 flows into the third COD removing reaction chamber 115, and treatment is continued in the third COD removing reaction chamber 115. In the process, external sewage is sequentially treated by three COD removal reaction chambers. In addition, when the pollutant concentration of the external sewage is low and only one COD removal reaction chamber is needed, the water inlet branch pipe and the overflow pipe of the COD removal reaction chamber before the last COD removal reaction chamber (115 in fig. 1 and 2) can be closed by the valves, and all the valves on the water inlet main pipe and the water inlet branch pipe of the last COD removal reaction chamber are opened, so that the external sewage can directly enter the last COD removal reaction chamber. Also, two stages of COD removal reaction using the last two COD removal reaction chambers may be selected.
As shown in fig. 1 and 3, after sewage is treated by three COD removal reaction chambers (113, 114, 115), a short-cut nitrification reaction chamber water inlet manifold 116 arranged at the top of the last COD removal reaction chamber (115) enters a short-cut nitrification reaction chamber one 120, a water inlet branch 117 in the short-cut nitrification reaction chamber one 120 is opened and the water inlet manifold 116 is closed by a valve 109, and sewage flows into the bottom of the short-cut nitrification reaction chamber one 120. Then, the sewage is fully contacted with ammonia oxidizing bacteria enriched on the spherical fiber filler, and the ammonia oxidizing bacteria oxidize ammonium nitrogen in the sewage into nitrite nitrogen through own metabolic activity. On the one hand, the bottom of the short-cut nitrification reaction chamber I120 is provided with a load limiting mechanism support 304, and a transmission mechanism, preferably a transmission belt or a chain, is arranged in the load limiting mechanism support 304. The load limiting mechanism bracket 304 is provided with a load limiting mechanism which mainly acts to bear the spherical fiber filler and limit the movement range of the filler. The load limiting mechanism comprises at least one load limiting mechanism flat plate 119 arranged in the horizontal direction, the load limiting mechanism flat plate 119 is preferably rectangular, a plurality of holes 118 are formed in the load limiting mechanism flat plate 119, the inner diameter of each load limiting mechanism hole 118 is smaller than 30% of the outer diameter of the spherical filler, and the density of the load limiting mechanism flat plate 119 is 950-1050 kg/m 3. one side of the load limiting mechanism flat plate 119 is fixed on the load limiting mechanism bracket 304, so that the load limiting mechanism flat plate 119 is in a horizontal state, and the load limiting mechanism flat plate 119 is connected to a transmission mechanism, and when the transmission mechanism rotates, the load limiting mechanism flat plate 119 can be driven to move up and down. Under the combined action of the water flow and the load limiting mechanism flat plate 119, the distribution state of the spherical fiber filler on the load limiting mechanism can be adjusted, so that gaps among the fillers are increased, mutual extrusion among the fillers is avoided, the mass transfer efficiency of the fillers is improved, and the high-concentration ammonia nitrogen water inlet device is better adapted. For better treatment of the sewage, the number of the load limiting mechanism plates 119 is preferably two or more, more preferably two, and the specific number is selected according to the concentration of ammonia nitrogen in the sewage and the treatment amount of the sewage. When the number of the load limiting mechanism plates 119 is equal to or greater than 2, the load limiting mechanism plates 119 are stacked up and down, as shown by the three load limiting mechanism plates 119 in fig. 3 being arranged in parallel up and down. On the other hand, an aeration device 303, preferably any one of an aeration pipe, an aeration disc or a jet aerator, is further provided at the bottom of the short-cut nitrification reaction chamber one 120. The aeration device 303 is installed on the aeration device bracket 302, and the aeration device bracket 302 is fixed at the bottom of the short-cut nitrification reaction chamber I120. Under the action of the aeration device, air enters the short-cut nitrification reaction chamber I120 through the aeration holes 301, is fully mixed with sewage, flows upwards from the bottom of the short-cut nitrification reaction chamber I120, fully contacts with the filler on the load limiting mechanism, and provides sufficient oxygen for ammonia oxidizing bacteria. under the action of ammonia oxidizing bacteria, ammonium nitrogen in sewage is converted into nitrite nitrogen. In the last aspect, an online DO monitoring device is further arranged in the shortcut nitrification reaction chamber I120, the operation of the aeration device 303 is controlled by monitoring the concentration of dissolved oxygen in sewage, and the concentration of the dissolved oxygen is preferably controlled within the range of 0.28-2.11 mg/L.
As shown in fig. 3, the valve on the water inlet manifold 116 in the first short-cut nitrification reaction chamber 120 and the valve on the water inlet manifold 116 in the second short-cut nitrification reaction chamber 121 are closed, and the overflow pipe in the first short-cut nitrification reaction chamber 120 and the water inlet branch pipe in the second short-cut nitrification reaction chamber 121 are opened. The sewage treated by the short-cut nitrification reaction chamber I120 is conveyed to the bottom of the short-cut nitrification reaction chamber II 121 through a pipeline formed by an overflow pipe, a water inlet main pipe and a water inlet branch pipe, and then ammonium nitrogen in the sewage is converted into nitrite nitrogen under the combined action of an aeration device, a load limiting mechanism and ammonia oxidizing bacteria on a spherical carrier. Similarly, the sewage treated by the second short-cut nitrification reaction chamber 121 is conveyed into the third short-cut nitrification reaction chamber 122 through an overflow pipe, a water inlet main pipe and a water inlet branch pipe, and then the short-cut nitrification reaction is completed in the third short-cut nitrification reaction chamber 122.
The number of the short-cut nitrification reaction chambers in the sewage treatment device is more than or equal to 2, and each short-cut nitrification reaction chamber forms a short-cut nitrification reaction zone. The sewage treated by the COD removal reaction chamber can be input into any one short-cut nitrification reaction chamber through the water inlet main 116, the water inlet branch 117, the overflow pipe 112 and the valve 109 on each pipeline. Any two or more than two short-cut nitrification reaction chambers can be connected in series to form a short-cut nitrification reaction channel for sewage treatment. For example, the valve on the water inlet main pipe in any short-cut nitrification reaction chamber is opened, and the valves on the water inlet branch pipe and the overflow pipe are closed at the same time, so that sewage can skip the short-cut nitrification reaction chamber and directly enter the next short-cut nitrification reaction chamber. In the short-cut nitrification reaction zone, sewage treated by the COD removal reaction chamber enters the short-cut nitrification reaction chamber from the last COD removal reaction chamber, sewage after short-cut nitrification reaction is discharged from the short-cut nitrification reaction zone from the pipe orifice of the water inlet main pipe in the last short-cut nitrification reaction chamber, and enters the subsequent anaerobic ammonia oxidation reaction stage. When the ammonia nitrogen concentration of the sewage in any one short-cut nitrification reaction chamber is lower than 20mg/L, the sewage treated by the reaction chamber enters a subsequent anaerobic ammonia oxidation reaction stage.
As shown in fig. 1 and 3, the sewage (ammonia nitrogen concentration lower than 20 mg/L) treated by the short-cut nitrification reaction chamber can flow from the opening of the total water inlet pipe 116 positioned in the third short-cut nitrification reaction chamber 122 to the wave plate 123 positioned in the wave plate chamber 124 by controlling the valves 109 on the overflow pipe 112, the total water inlet pipe 116 and the split water inlet pipe 117. In the process of sewage flowing through the wave plate, dissolved oxygen can gradually overflow. The sludge suspended in the sewage can gradually settle, especially when the sludge meets the convex part on the wave plate, the sludge can be intercepted and settled. Through the buffer effect of the wave plate, the dissolved oxygen and the sludge in the sewage are greatly reduced. This is more advantageous for subsequent anaerobic ammoxidation reactions. One side of the wave plate 123 is fixed to a side wall of the wave plate chamber 124. The side wall of the head of the wave plate 123 is higher than the convex part on the wave plate, and the bottom of the side wall of the tail of the wave plate 123 is provided with a drain hole which can be communicated with the water inlet pipe 125 of the anaerobic ammonia oxidation reaction chamber. One end of the wave plate 123 receives sewage after short-range nitration reaction, and the other end is communicated with the anaerobic ammonia oxidation reaction chamber water inlet pipe 125. The sewage after the wave plate sedimentation is conveyed to the anaerobic ammonia oxidation reaction chamber by the anaerobic ammonia oxidation reaction chamber water inlet pipe 125.
Fig. 3 shows a specific arrangement of the wave plates 123, the number of wave plates 123 preferably being at least one. When the number of the wave plates 123 is more than or equal to 2, the wave plates are vertically stacked and distributed, and the heads and the tails of the adjacent upper wave plates and the lower wave plates are connected, so that sewage overflows from the tail of the upper wave plate to the head of the lower wave plate, flows through the lower wave plate, overflows from the tail of the lower wave plate to the head of the lower wave plate until reaching the tail of the last wave plate, and finally is conveyed into the anaerobic ammonia oxidation reaction chamber through the anaerobic ammonia oxidation reaction chamber water inlet pipe 125.
As shown in fig. 1 and 3, one end of the anaerobic ammonia oxidation reaction chamber water inlet pipe 125 is communicated with the tail of the wave plate 123, and the other end is opened at the bottom of the anaerobic ammonia oxidation reaction chamber 102. The microbial charge suspension bracket 128 is mounted on the upper side wall of the anaerobic ammonia oxidation reaction chamber 102, and the shape of the microbial charge suspension bracket 128 is preferably a tooth-shaped structure (see fig. 5), and is further preferably any one of a groove-shaped suspension bracket 501, a zigzag-shaped suspension bracket 502 or a V-shaped suspension bracket 503. The recess of the microbial filler suspension bracket 128 is used for suspending the microbial filler 127, the microbial filler 127 is preferably a curtain-shaped fibrous filler, and the bottom of the filler is provided with a counterweight, so that the microbial filler 127 is kept in the vertical direction. The counterweight is preferably angle iron, square stainless steel, iron block, etc. The horizontal spacing between adjacent depressions is 1-2 cm on the microbial charge suspension support 128. The horizontal distance between two adjacent microbial fillers 127 is preferably 3-8 cm, and the distance between the specific microbial fillers can be adjusted according to the requirement of anaerobic ammoxidation reaction, and the adjustment mode is preferably set in advance or adjusted on line. A drain port is provided in the upper side wall of the anaerobic ammonium oxidation reaction chamber 102, and a drain pipe 103 is attached to the drain port. The clean water treated by the anaerobic ammoxidation reaction chamber is discharged from the sewage treatment apparatus of the present invention through the drain pipe 103.
As shown in fig. 1, in order to better ensure smooth operation of the sewage treatment process, sludge discharge pipes 126 are provided on the bottom side walls of all of the COD removal reaction chamber, the short-cut nitrification reaction chamber, the wave plate chamber and the anaerobic ammonia oxidation reaction chamber.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. Improvements and modifications within the scope of the present invention will occur to those skilled in the art without departing from the principles of the invention.
Claims (7)
1. A device for stably realizing a shortcut nitrification anaerobic ammonia oxidation process is characterized in that:
the device mainly comprises a shell, a partition plate, a filling frame, a load limiting mechanism and a wave plate:
The baffle divides the closed accommodating space of the shell into a water inlet pump chamber, a COD removal reaction chamber, a shortcut nitrification reaction chamber, a wave plate chamber and an anaerobic ammonia oxidation reaction chamber;
the packing rack is arranged in the COD removal reaction chamber;
the load limiting mechanism is arranged in the short-cut nitrification reaction chamber and is used for limiting the movement of the microbial filler;
the wave plate is arranged in the wave plate chamber, and the wave plate communicates the short-cut nitrification reaction chamber with the anaerobic ammonia oxidation reaction chamber;
when sewage is treated, external sewage enters the water inlet pump chamber from the water inlet of the device, then sequentially flows through the COD removal reaction chamber, the short-cut nitrification reaction chamber, the wave plate chamber and the anaerobic ammonia oxidation reaction chamber, and the treated clean water is discharged from the water outlet of the device;
The packing rack is cuboid or polyhedral, a plurality of rib plates are arranged in the packing rack, and different rib plates are arranged in parallel along the vertical direction;
The lower end of the packing frame is fixed on a packing frame bracket, and the packing frame bracket is fixed at the bottom of the COD removal reaction chamber;
the COD removing reaction chamber comprises a first COD removing reaction chamber, a second COD removing reaction chamber and a third COD removing reaction chamber;
a water inlet pump is arranged in the water inlet pump chamber, a water outlet of the water inlet pump is connected with one end of a water inlet main pipe of the COD removal reaction chamber, water inlet branch pipes leading to each COD removal reaction chamber are respectively arranged on the water inlet main pipe of the COD removal reaction chamber, the other end of the water inlet main pipe of the COD removal reaction chamber is connected with water inlet branch pipes of the last COD removal reaction chamber, valves for controlling the flow direction of sewage are respectively arranged on the water inlet main pipe of the COD removal reaction chamber and the water inlet branch pipes of the COD removal reaction chamber, and sewage to be treated can be respectively provided for each COD removal reaction chamber by opening or closing the valves;
The top of the right side of the first COD removing reaction chamber and the top of the right side of the second COD removing reaction chamber are provided with overflow pipes, the pipe walls of the overflow pipes are provided with water inlet holes, one ends of the overflow pipes are opened at the water inlet main pipe of the COD removing reaction chamber, the other ends of the overflow pipes are blind ends, and one ends of the overflow pipes, which are close to the water inlet main pipe of the COD removing reaction chamber, are provided with valves;
the short-cut nitrification reaction chamber is provided with a short-cut nitrification reaction chamber water inlet main pipe, the short-cut nitrification reaction chamber water inlet main pipe is provided with a short-cut nitrification reaction chamber water inlet branch pipe, an overflow pipe and a valve, and one end of the overflow pipe, which is close to the short-cut nitrification reaction chamber water inlet main pipe, is provided with the valve;
The load limiting mechanism is arranged on a load limiting mechanism bracket, the load limiting mechanism bracket is fixed at the bottom of the short-cut nitrification reaction chamber, and the load limiting mechanism can move up and down along the load limiting mechanism bracket under the action of a transmission mechanism;
The load limiting mechanism comprises at least one perforated plate, and the inner diameter of the perforated plate is less than 30% of the outer diameter of the microbial filler;
Under the combined action of the water flow and the load limiting mechanism flat plate, the distribution state of the spherical fiber filler on the load limiting mechanism can be adjusted.
2. The apparatus for stably implementing a short-cut nitrification anaerobic ammonia oxidation process as claimed in claim 1, wherein:
The cross section of each rib plate in the horizontal direction is S-shaped, and the distance between two adjacent rib plates is 0.1-5cm.
3. The apparatus for stably implementing a short-cut nitrification anaerobic ammonia oxidation process as claimed in claim 1, wherein:
The height from the bottom end of the filling frame to the bottom of the COD removal reaction chamber is 45-55% of the total height of the COD removal reaction chamber.
4. The apparatus for stably implementing a short-cut nitrification anaerobic ammonia oxidation process as claimed in claim 1, wherein:
The density of the flat plate is 950-1050 kg/m 3.
5. The apparatus for stably implementing a short-cut nitrification anaerobic ammonia oxidation process as claimed in claim 1, wherein:
The wave plate is provided with at least one layer, one end of the wave plate is connected with a water outlet of the short-cut nitrification reaction chamber, the other end of the wave plate is connected with a water inlet of the anaerobic ammonia oxidation reaction chamber, when the number of layers of the wave plate is more than or equal to 2, the wave plates are distributed in an up-down lamination mode, and the adjacent upper layer and the lower layer of the wave plates are connected in a head-tail mode, so that all the wave plates are connected in series to form a sewage flowing channel.
6. The apparatus for stably implementing a short-cut nitrification anaerobic ammonia oxidation process as claimed in claim 1, wherein:
an aeration device and an online DO detection device are arranged at the bottom of the short-cut nitrification reaction chamber.
7. The apparatus for stably implementing a short-cut nitrification anaerobic ammonia oxidation process as claimed in claim 1, wherein:
the anaerobic ammonia oxidation reaction chamber is characterized in that a toothed microbial filler bracket is arranged at the upper part of the anaerobic ammonia oxidation reaction chamber, microbial fillers can be suspended between two adjacent toothed protrusions, and weights are arranged at the bottoms of the microbial fillers.
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