CN110563141A - Pneumatic biological rotating cage equipment and efficient biological denitrification sewage treatment method - Google Patents
Pneumatic biological rotating cage equipment and efficient biological denitrification sewage treatment method Download PDFInfo
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- CN110563141A CN110563141A CN201910905715.4A CN201910905715A CN110563141A CN 110563141 A CN110563141 A CN 110563141A CN 201910905715 A CN201910905715 A CN 201910905715A CN 110563141 A CN110563141 A CN 110563141A
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- 239000010865 sewage Substances 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000001301 oxygen Substances 0.000 claims abstract description 53
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 53
- 239000000945 filler Substances 0.000 claims abstract description 38
- 239000007789 gas Substances 0.000 claims abstract description 36
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000009792 diffusion process Methods 0.000 claims abstract description 30
- 238000005273 aeration Methods 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 75
- 238000005192 partition Methods 0.000 claims description 49
- 238000004062 sedimentation Methods 0.000 claims description 11
- 239000010802 sludge Substances 0.000 claims description 8
- 230000015556 catabolic process Effects 0.000 claims description 4
- 238000006731 degradation reaction Methods 0.000 claims description 4
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 claims description 3
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000006396 nitration reaction Methods 0.000 claims description 3
- 238000000638 solvent extraction Methods 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 206010021143 Hypoxia Diseases 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000001079 digestive effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
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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
- C02F3/02—Aerobic processes
- C02F3/08—Aerobic processes using moving contact bodies
-
- 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
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- 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)
- 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)
- Biological Treatment Of Waste Water (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses pneumatic biological rotating cage equipment and a high-efficiency biological denitrification sewage treatment method. Through the arrangement of the gas diffusion component, dissolved oxygen can be provided for a biological film on biological filler in the rotating cage through aeration, and the rotating cage is pushed to rotate, so that the biological film and sewage are fully contacted and mixed, and the denitrification efficiency is improved; and the structure is simple, the occupied area of the equipment is small, the investment cost is low, the energy consumption is low through pneumatic pushing, and the later maintenance is simple.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to pneumatic biological rotating cage equipment and a sewage treatment method for efficient biological denitrification.
background
With the rapid development of Chinese economy, the problem of water pollution is increasingly severe. The traditional sewage denitrification treatment technology is an activated sludge method based on oxygen deficiency-oxygen deficiency, and the technology has low denitrification efficiency, high energy consumption and easy sludge expansion. In recent years, the biofilm method based on the suspended filler is gradually paid attention to by people, and is considered as a potential technology which is most likely to replace the traditional activated sludge method in the future, and the key of the operation effect is to ensure that the filler is uniformly distributed in equipment, ensure that the biofilm is fully contacted with sewage, and is not easy to fall off. The biological rotating disc is another biological membrane method treatment process based on fixed fillers (rotating disc), but the disc has complex structure, higher manufacturing and processing cost and low volume load and is not suitable for treating large-scale sewage. In recent years, with the increasing of small-scale sewage treatment projects in villages and towns, rural areas and the like in China, the rotating biological disk process is gradually favored by people in the industry due to the advantages of stable denitrification effect, simple operation and management and the like. However, compared with the suspension packing, the rotary disc has small effective surface area, insufficient biomembrane attachment amount and low space utilization rate. The traditional electric biological rotating disc needs a reduction box, a motor and other rotating disc driving devices, has high energy consumption and large maintenance workload, and causes inconvenience for long-term use and maintenance in underdeveloped areas such as rural areas.
Disclosure of Invention
In order to solve at least one of the above technical problems, the present invention provides a pneumatic biological rotating cage device and a sewage treatment method with high efficiency biological denitrification.
The technical scheme adopted by the invention is as follows: a pneumatic biological rotating cage device comprises a water tank, a rotating cage and a gas diffusion component; the rotating cage is arranged in the water tank, and biological fillers are filled in the rotating cage; the gas diffusion component is used for supplying oxygen to an aerobic area in the water tank through aeration and pushing the rotating cage to rotate.
According to a specific embodiment of the invention, a baffle plate assembly is arranged in the water tank, the baffle plate assembly comprises a first baffle plate and a second baffle plate which are arranged at intervals along the transverse axial direction of the water tank, and the first baffle plate and the second baffle plate divide the water tank into an anoxic zone, an aerobic zone and a sedimentation zone in sequence along the transverse axial direction; the bottom of the second partition plate is provided with an opening for sewage to flow into the settling zone from the aerobic zone; the upper part of the anoxic zone is provided with a water inlet, and the upper part of the sedimentation zone is provided with a water outlet;
The rotating cage comprises a first rotating cage and a second rotating cage, the first rotating cage and the second rotating cage are connected through a rotating shaft and are respectively arranged in an anoxic zone and an aerobic zone in the water tank; the gas diffusion component is arranged below the side of the second rotating cage and used for supplying oxygen to the aerobic area through aeration and pushing the second rotating cage to rotate, and then the rotating shaft drives the first rotating cage to rotate.
According to a specific embodiment of the present invention, the baffle plate assembly further includes a third baffle plate, the third baffle plate is disposed at an interval on a side of the first baffle plate away from the second baffle plate along the transverse axial direction of the water tank, or disposed between the first baffle plate and the second baffle plate along the transverse axial direction of the water tank, so as to form a micro-oxygen region between the anoxic region and the aerobic region in the water tank; an opening for sewage to flow from the anoxic zone to the micro-oxygen zone is formed in the bottom of the first partition plate or the third partition plate between the anoxic zone and the micro-oxygen zone; the rotating cage further comprises a third rotating cage, and the third rotating cage is arranged in the micro-oxygen area through the rotating shaft.
According to an embodiment of the present invention, the gas diffusion component is disposed below the third rotating cage, and is configured to supply oxygen to the micro-oxygen region through aeration, and to push the third rotating cage to rotate, while driving the first rotating cage to rotate through the rotating shaft.
According to a specific embodiment of the invention, the bottom of the anoxic zone, the micro-aerobic zone, the aerobic zone and the sedimentation zone in the water tank are provided with sludge discharge ports.
According to an embodiment of the present invention, a return channel communicating the aerobic zone and the anoxic zone is provided at the upper part of the water tank.
According to an embodiment of the invention, the dissolved oxygen in the aerobic zone in the water tank is greater than or equal to 5mg/L, and the dissolved oxygen in the micro-oxygen zone is 0.5-2 mg/L.
According to a specific embodiment of the present invention, a partition plate is disposed inside the rotating cage for partitioning and defining the biological stuffing material in different areas inside the rotating cage.
According to an embodiment of the present invention, the biological filler has a specific surface area greater than 800m2/m3The feed ratio of the biological filler in the rotating cage is greater than or equal to 50%.
In addition, the invention also provides a sewage treatment method for high-efficiency biological denitrification, which comprises the following steps:
S1, adopting any pneumatic biological rotating cage equipment, firstly opening the gas diffusion component to supply oxygen to the aerobic area through aeration, pushing the second rotating cage to rotate, and further driving other rotating cages to rotate through the rotating shaft;
S2, introducing the sewage into an anoxic zone in the water tank from the water inlet, and enabling the sewage to flow through the rotating first rotating cage to be fully contacted with the biological filler so as to carry out denitrification; the treated sewage flows into an aerobic zone through the top of the first partition plate, flows through the rotating second rotating cage to fully contact with the biological filler, and the biological membrane attached and grown on the surface of the biological filler performs degradation and nitration reaction on the sewage under aerobic condition, so that BOD is removed and ammonia nitrogen is converted into nitrate nitrogen; the treated sewage enters the settling zone through the bottom opening of the second clapboard and is discharged from the water outlet.
The beneficial technical effects of the invention are as follows: the invention provides pneumatic biological rotating cage equipment and a sewage treatment method for high-efficiency biological denitrification; the pneumatic biological rotating cage equipment comprises a water tank, a rotating and gas diffusion component, wherein the rotating cage is arranged in the water tank and is filled with biological fillers, and the gas diffusion component is used for supplying oxygen to an aerobic area in the water tank and pushing the rotating cage to rotate through aeration; the gas diffusion component is arranged, so that dissolved oxygen can be provided for a biological film on the biological filler in the rotating cage through aeration, and the rotating cage is pushed to rotate, so that the biological film and sewage are fully contacted and mixed, and the denitrification efficiency is improved; and the structure is simple, the occupied area of the equipment is small, the investment cost is low, the energy consumption is low through pneumatic pushing, and the later maintenance is simple.
Drawings
In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below.
FIG. 1 is a schematic structural view of a pneumatic biological rotating cage apparatus according to an embodiment of the present invention;
Fig. 2 is a left side view of a basket in the pneumatic type biological basket apparatus shown in fig. 1.
Detailed Description
The conception, the specific structure and the technical effects of the present invention will be clearly and completely described in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the schemes and the effects of the present invention. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
it should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. Furthermore, the descriptions of upper, lower, left, right, etc. used in the present invention are only relative to the positional relationship of the respective constituent elements of the present invention in the drawings, and the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by a person skilled in the art that the embodiments and features of the embodiments in the present application can be combined with each other without conflict.
referring to fig. 1 and 2, fig. 1 is a schematic structural view of a pneumatic biological rotation cage apparatus according to an embodiment of the present invention, and fig. 2 is a left side view of a rotation cage of the pneumatic biological rotation cage apparatus shown in fig. 1; the left and right side views of the rotary cage of the pneumatic biological rotary cage device in fig. 1 are the same. As shown in FIG. 1, the pneumatic biological rotating cage device of the present embodiment comprises a water tank 1, a rotating cage 2 and a gas diffusion component 3.
in this embodiment, a baffle plate assembly is arranged inside the water tank 1, the baffle plate assembly comprises a first baffle plate 11 and a second baffle plate 12 which are arranged at intervals along the transverse axial direction of the water tank, and a third baffle plate 13 which is arranged at intervals along the transverse axial direction of the water tank 1 on the side of the first baffle plate 11 departing from the second baffle plate 12, and the third baffle plate 13, the first baffle plate 11 and the second baffle plate 12 divide the water tank 1 into an anoxic zone 101, a micro-aerobic zone 102, an aerobic zone 103 and a sedimentation zone 104 in sequence along the transverse axial direction. The bottom of the third partition plate 13 is not closed or is provided with an opening, so that the sewage in the anoxic zone 101 can flow into the micro-oxygen zone 102 from the opening at the bottom of the third partition plate 13; the bottom of the first partition plate 11 is closed and does not have an opening, and the sewage in the micro-oxygen region 102 flows into the aerobic region 103 from the top of the first partition plate 11; the bottom of the second partition 12 is not closed or left open so that the sewage in the aerobic zone 103 can flow into the settling zone 104 from the opening in the bottom of the second partition 12. The upper part of the anoxic zone 101 is provided with a water inlet 14; in order to facilitate the interception of scum in sewage, a filtering component, such as a grid filter screen, can be arranged at the water inlet 14, and further the intercepted scum can be removed periodically by a manual cleaning mode; the upper part of the settling zone 104 is provided with a water outlet 15. In order to facilitate the discharge of sludge in each area, sludge discharge ports 16 are arranged at the bottoms of the anoxic zone 101, the micro-aerobic zone 102, the aerobic zone 103 and the sedimentation zone 104 in the water tank 1.
The third partition plates 13 are arranged on one side of the first partition plate 11 departing from the second partition plate 12 at intervals along the transverse axial direction of the water tank 1; in other embodiments, the third partition 13 may be provided between the first partition 11 and the second partition 12 at intervals along the lateral axis of the water tank 1. The third partition plate 13 is arranged to separate the micro-oxygen region 102 between the anoxic region 101 and the aerobic region 103, and the micro-oxygen region 102 can be used as a buffer region for the aerobic region 103 and the anoxic region 101, so that a large amount of oxygen can be prevented from diffusing to the anoxic region 101, interference between the regions is reduced, respective corresponding treatment reactions are fully completed, efficient denitrification is further realized, and the stability of the effluent quality is ensured. Of course, in other embodiments, the third partition 13 may be omitted, and accordingly, the water tank 1 may be divided into the anoxic zone 101, the aerobic zone 103 and the settling zone 104 in order along the transverse axis by the first partition 11 and the second partition 12. In addition, each baffle is through adopting above mode of setting up, and the water flow route is the shape of buckling, can make sewage and biofilm carrier fully contact to improve sewage treatment efficiency.
The rotating cages 2 are one or more, biological fillers are filled in the rotating cages, and the rotating cages are arranged in the water tank 1 through the rotating shafts 21. The rotating cage can be in a cylinder shape, a conical round table shape and the like, the outer frame of the rotating cage is generally in a grid shape and can be made of one or more perforated plates or screens, and the joints can be connected by adopting buckles, so that the outer frame can be opened and closed; the aperture of the perforated plate or the screen is generally 5-40 mm, and the material can be stainless steel, carbon steel, plastic or glass fiber reinforced plastic. In order to ensure that the biological filler in the rotating cage is uniformly distributed, a partition plate can be arranged in the rotating cage to partition and limit the biological filler in different areas, so that the utilization rate of a biological film of the biological filler is improved. The partition plate is generally a latticed partition plate, and the aperture is 5-40 mm. The cage 2 is typically completely submerged within the tank 1.
Referring to fig. 1 and 2, in the present embodiment, the rotating cage 2 specifically includes a first rotating cage 22, a second rotating cage 24 and a third rotating cage 23, each rotating cage is cylindrical, the outer frame is formed by splicing two soft plastic sheets, two fasteners 25 are disposed at the joints, three latticed partition plates 26 are disposed in each rotating cage, the partition plates 26 are disposed through the central axis of the rotating cage and equally divide the rotating cage into 6 partitions along the radial direction of the rotating cage, so as to evenly partition and limit the biological filler in each partition. The first rotating cage 22, the third rotating cage 23 and the second rotating cage 24 are connected in sequence through the rotating shaft 21 and are respectively arranged in the anoxic zone 101, the micro-oxygen zone 102 and the aerobic zone 103 in the water tank 1 along the transverse axial direction of the water tank 1. The rotating shaft 21 comprises a rotating shaft and a bearing, the rotating shaft sequentially penetrates through central shafts of the first rotating cage 22, the third rotating cage 23 and the second rotating cage 24, and is fixedly connected with the rotating cages; both ends of the rotating shaft are mounted on the water tank 1 through bearings, and the rotating shaft can rotate along the bearings.
The rotating cage 2 is filled with biological filler which can be made of high polymer synthetic materials such as plastics, sponge and the likeThe biological filler can be cubic, cylindrical or spherical, the particle size is generally 8-50 mm, and a biological film is arranged on the surface of the biological filler; the particle size of the biological filler is generally larger than the aperture of the outer frame of the rotating cage 2 and the aperture of the partition plate 26. The biological filler is suspended biological filler, and preferably has a specific surface area of more than 800m2/m3Suspended biological fillers of (e.g., K-3 fillers; the charge ratio of the biological filler in the rotating cage 2 is generally greater than or equal to 50%.
The gas diffusion member 3 serves to supply oxygen to the aerobic area in the water tank 1 by aeration and to drive the rotation of the cage. The gas diffusion component 3 comprises a gas pump and an aeration head which are connected through a gas path pipe; the aeration head is generally disposed below the side of the cage in the aerobic area and the air outlet is directed toward the outer edge of the cage so that the gas diffusion member 3 supplies oxygen to the aerobic area in the water tank 1 by aeration and pushes the cage to rotate. In this embodiment, the aerobic zone is an aerobic zone 103 and a micro-aerobic zone 102, and the gas diffusion assembly 3 is disposed below the sides of the second and third cages 24 and 23, and is used for supplying oxygen to the aerobic zone 103 and the micro-aerobic zone 102 through aeration, pushing the second and third cages 24 and 23 to rotate, and further driving the first cage 22 to rotate through the rotating shaft 21. The gas diffusion assembly 3 specifically comprises a gas pump 31, a gas flow meter 32, an air path pipe 33 and an aeration head 34, wherein the aeration head 34 is connected with the gas flow meter 32 and the gas pump 31 through the air path pipe 33. Aeration head 34 locates the side below of second rotating cage 24 and third rotating cage 23 and the outer fringe of gas outlet orientation rotating cage to in the time of promoting second rotating cage 24 and third rotating cage 23 pivoted through pivot 21 promote the rotation of first rotating cage 22 in anoxic zone 101 through the aeration to the oxygen suppliment of aerobic zone 103 and little oxygen district 102 and promote second rotating cage 24 and third rotating cage 23 rotation, with the effective area of contact of biofilm on pollutant and the biofilm among the improvement sewage, realize high-efficient denitrogenation. In addition, the aeration quantity can be controlled by adjusting the air pump 31, and then the difference of dissolved oxygen in different areas in the water tank 1 is controlled according to requirements, so that biological membranes controlled by different biological communities are formed, and multiple functions of organic matter degradation, nitrification and denitrification are realized; the flow rate of the air pump 31 can be adjusted according to the sewage load, and the dissolved oxygen in the corresponding area in the water tank 1 and the rotating speed of the rotating cage are controlled so as to adapt to the sewage change of different loads, adjust the sewage treatment effect, ensure the effluent quality and reduce the treatment energy consumption. Wherein the dissolved oxygen of the aerobic zone 103 is generally greater than or equal to 5mg/L, and the dissolved oxygen of the micro-aerobic zone 102 is 0.5-2 mg/L. In addition, the gas diffusion component 3 is matched with the rotating cage to form a high-efficiency biofilm method for sewage treatment, a secondary sedimentation tank is not needed for treated effluent, and if a small amount of sludge exists, the treated effluent can be directly discharged into a natural water body after passing through the sedimentation zone 104, so that the floor area can be reduced.
The above micro-oxygen region 102 is used as a buffer region for the aerobic region 103 and the anoxic region 101, which can prevent a large amount of oxygen from diffusing to the anoxic region 101, in other embodiments, the gas diffusion component 3 may be arranged to supply oxygen to the aerobic region 103 by aeration, push the second rotating cage 24 to rotate, and push the first rotating cage 22 and the third rotating cage 23 to rotate through the rotating shaft 21, that is, the gas diffusion component for supplying oxygen to the micro-oxygen region is not arranged.
In the present embodiment, the upper part of the water tank 1 is further provided with a return channel 17 communicating the aerobic zone 103 and the anoxic zone 101. Because the high-intensity aeration of the gas diffusion component 3 can cause the water level of the aerobic zone 103 to rise, the digestive juice can enter the return channel 17 and flow back to the anoxic zone 101 through the arrangement of the return channel 17, and denitrification is realized by utilizing the carbon source of the inlet water.
In the above embodiment, the water tank 1 is divided into different areas by arranging the partition plate assembly in the water tank 1, wherein the different areas comprise an aerobic area and an anoxic area, the aerobic area and the anoxic area are both provided with rotating cages, and the rotating cages are connected through the rotating shaft; the gas diffusion component 3 supplies oxygen to the aerobic area and pushes the rotating cage arranged in the aerobic area to rotate, so that the rotating cage in the anoxic area is driven to rotate. The aerobic zone 103 and the anoxic zone 101 correspond to an aerobic zone and an anoxic zone, respectively; the micro-aerobic zone 102 serves as a buffer zone for the aerobic zone 103 and the anoxic zone 101, and can be understood as an aerobic zone or an anoxic zone; if used as an anoxic zone, the oxygen required for the micro-aerobic zone 102 is obtained by diffusion through the aerobic zone. In other embodiments, the baffle plate assembly is not needed, the device is combined with other equipment for sewage treatment, and the device can perform aeration through the gas diffusion assembly 3 during the treatment process so as to perform aerobic reaction treatment by using biological fillers in the rotating cage; alternatively, a plurality of rotating cages are transversely connected through the rotating shaft 21, and the gas diffusion assembly 3 is arranged along the transverse axial direction of the water tank and at the end close to the water tank 1 on the side deviating from the water inlet 14 of the water tank 1 so as to supply oxygen and push the rotating cages to rotate through aeration.
The pneumatic biological rotating cage equipment of the embodiment adopts pneumatic pushing, and the later maintenance is simple; the equipment can be used independently or combined with other processes, and can form integrated equipment through simple assembly, so that efficient full-flow treatment of sewage is realized; the sewage treatment process is simple to operate, small in occupied area, low in capital construction, operation and maintenance cost, wide in water treatment amount range and suitable for large, medium and small areas.
The pneumatic biological rotating cage equipment of the embodiment is adopted to carry out sewage treatment, and high-efficiency denitrification can be realized. Specifically, for example, the pneumatic biological rotating cage device shown in fig. 1 is used for sewage treatment, and the operation process comprises the following steps: respectively starting the gas diffusion components 3 below the aerobic zone 103 and the micro-aerobic zone 102, supplying oxygen to the aerobic zone 103 and the micro-aerobic zone 102 through aeration, pushing the second rotating cage 24 and the third rotating cage 23 to rotate, and driving the first rotating cage 22 of the anoxic zone 101 to rotate through the rotating shaft 21 while the second rotating cage 24 and the third rotating cage 23 rotate; sewage is introduced into the anoxic zone 101 in the water tank 1 from the water inlet 14, flows through the rotating first rotating cage 22 and fully contacts with the biological filler to realize denitrification by the action of denitrifying bacteria therein; the treated sewage flows into the micro-aerobic zone 102 through the bottom of the third partition plate 13, flows through the rotating third rotating cage 23 and is fully contacted with the biological filler, so that nitrification and denitrification are further realized through the synchronous action of nitrifying bacteria and denitrifying bacteria in the biological filler, and a small amount of organic matters are degraded; the treated sewage flows into the aerobic zone 103 through the top of the first clapboard 11, flows through the rotating second rotating cage 24 to fully contact with the biological filler, and the biological film attached and grown on the biological filler performs degradation and nitration reaction on the sewage under the aerobic condition, so as to realize BOD removal and the conversion of ammonia nitrogen into nitrate nitrogen; the treated sewage enters the settling zone 104 through the bottom opening of the second partition plate 12 and is discharged from the water outlet 15.
By adopting the pneumatic rotating cage equipment and respectively carrying out treatment experiments on different sewage in different places according to the method, the removal rate of the total nitrogen in the sewage can reach 80 percent, the concentration of the total nitrogen in the effluent is lower than 20mg/L, and the sewage discharge standard of the first-level B is met.
If the water tank of the pneumatic biological rotating cage device does not contain a micro-oxygen area, the water tank is sequentially divided into an anoxic area, an aerobic area and a sedimentation area along the transverse axial direction by a first partition plate and a second partition plate, the bottom of the first partition plate between the anoxic area and the aerobic area is closed without an opening, and sewage in the anoxic area flows into the aerobic area from the top of the first partition plate; the bottom of the second clapboard is not closed or is provided with an opening, so that the sewage in the aerobic zone can flow into the sedimentation zone from the bottom opening of the second clapboard. The pneumatic biological rotating cage equipment with the structure is used for sewage treatment, the operation steps of the pneumatic biological rotating cage equipment are basically the same as the operation steps of the pneumatic biological rotating cage equipment shown in the figure 1, and the difference is that: the treatment process of the micro-oxygen zone is omitted, and sewage flows into the aerobic zone from the top of the first partition plate for treatment after being treated in the anoxic zone. Through the cooperation of the gas diffusion component and the rotating cage, high-efficiency denitrification can be realized.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. the pneumatic biological rotating cage equipment is characterized by comprising a water tank, a rotating cage and a gas diffusion component; the rotating cage is arranged in the water tank, and biological fillers are filled in the rotating cage; the gas diffusion component is used for supplying oxygen to an aerobic area in the water tank through aeration and pushing the rotating cage to rotate.
2. The pneumatic biological rotating cage equipment as claimed in claim 1, wherein a baffle plate assembly is arranged in the water tank, the baffle plate assembly comprises a first baffle plate and a second baffle plate which are arranged at intervals along the transverse axial direction of the water tank, and the first baffle plate and the second baffle plate divide the water tank into an anoxic zone, an aerobic zone and a sedimentation zone in sequence along the transverse axial direction; the bottom of the second partition plate is provided with an opening for sewage to flow into the settling zone from the aerobic zone; the upper part of the anoxic zone is provided with a water inlet, and the upper part of the sedimentation zone is provided with a water outlet;
the rotating cage comprises a first rotating cage and a second rotating cage, the first rotating cage and the second rotating cage are connected through a rotating shaft and are respectively arranged in an anoxic zone and an aerobic zone in the water tank; the gas diffusion component is arranged below the side of the second rotating cage and used for supplying oxygen to the aerobic area through aeration and pushing the second rotating cage to rotate, and then the rotating shaft drives the first rotating cage to rotate.
3. The pneumatic bioconversion cage apparatus of claim 2, wherein the diaphragm assembly further comprises a third diaphragm; the third partition plate is arranged on one side of the first partition plate, which is far away from the second partition plate, at intervals along the transverse axial direction of the water tank, or is arranged between the first partition plate and the second partition plate at intervals along the transverse axial direction of the water tank, so that a micro-oxygen area is formed between the anoxic area and the aerobic area in the water tank; an opening for sewage to flow from the anoxic zone to the micro-oxygen zone is formed in the bottom of the first partition plate or the third partition plate between the anoxic zone and the micro-oxygen zone; the rotating cage further comprises a third rotating cage, and the third rotating cage is arranged in the micro-oxygen area through the rotating shaft.
4. The pneumatic biological rotating cage device of claim 3, wherein the gas diffusion component is arranged below the third rotating cage, and is used for supplying oxygen to the micro-oxygen area through aeration and pushing the third rotating cage to rotate, and the first rotating cage is driven to rotate through the rotating shaft.
5. The pneumatic biological rotating cage equipment as claimed in claim 3, wherein the bottom of the anoxic zone, the micro-aerobic zone, the aerobic zone and the settling zone in the water tank are provided with sludge discharge ports.
6. The pneumatic biological rotation cage device of claim 2, wherein the upper part of the water tank is provided with a return channel communicating the aerobic zone and the anoxic zone.
7. The pneumatic biological rotating cage equipment as claimed in claim 2, wherein the dissolved oxygen in the aerobic zone in the water tank is greater than or equal to 5mg/L, and the dissolved oxygen in the micro-oxygen zone is 0.5-2 mg/L.
8. The pneumatic biological rotating cage device according to any one of claims 1 to 7, wherein a partition plate is provided in the rotating cage for partitioning and defining the biological stuffing material in different areas in the rotating cage.
9. The pneumatic biological rotating cage equipment as claimed in claim 8, wherein the biological filler has a specific surface area of more than 800m2/m3the feed ratio of the biological filler in the rotating cage is greater than or equal to 50%.
10. A sewage treatment method for high-efficiency biological denitrification is characterized by comprising the following steps:
S1, adopting the pneumatic biological rotating cage device as claimed in any one of claims 2-9, firstly opening the gas diffusion component to supply oxygen to the aerobic area through aeration and drive the second rotating cage to rotate, and then driving other rotating cages to rotate through the rotating shaft;
S2, introducing the sewage into an anoxic zone in the water tank from the water inlet, and enabling the sewage to flow through the rotating first rotating cage to be fully contacted with the biological filler so as to carry out denitrification; the treated sewage flows into an aerobic zone through the top of the first partition plate, flows through the rotating second rotating cage to fully contact with the biological filler, and the biological film attached and grown on the biological filler performs degradation and nitration reaction on the sewage under the aerobic condition, so that BOD is removed and ammonia nitrogen is converted into nitrate nitrogen; the treated sewage enters the settling zone through the bottom opening of the second clapboard and is discharged from the water outlet.
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| CN201910905715.4A CN110563141A (en) | 2019-09-24 | 2019-09-24 | Pneumatic biological rotating cage equipment and efficient biological denitrification sewage treatment method |
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| CN201910905715.4A CN110563141A (en) | 2019-09-24 | 2019-09-24 | Pneumatic biological rotating cage equipment and efficient biological denitrification sewage treatment method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020239141A1 (en) * | 2019-05-29 | 2020-12-03 | 清华-伯克利深圳学院筹备办公室 | Pneumatic biological rotary cage device and sewage treatment method realizing efficient biological nitrogen removal |
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| CN103288214A (en) * | 2013-06-26 | 2013-09-11 | 四川大学 | Efficient denitrifying integrated biological drum and operating method thereof |
| CN205024043U (en) * | 2015-09-03 | 2016-02-10 | 江苏博恩环境工程成套设备有限公司 | Biological rotating cage sewage treatment plant of integral type |
| CN110104766A (en) * | 2019-05-29 | 2019-08-09 | 清华-伯克利深圳学院筹备办公室 | A kind of sewage water treatment method of pneumatic type biological rotary cage equipment and high-efficiency biological denitrification |
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| CN103288214A (en) * | 2013-06-26 | 2013-09-11 | 四川大学 | Efficient denitrifying integrated biological drum and operating method thereof |
| CN205024043U (en) * | 2015-09-03 | 2016-02-10 | 江苏博恩环境工程成套设备有限公司 | Biological rotating cage sewage treatment plant of integral type |
| CN110104766A (en) * | 2019-05-29 | 2019-08-09 | 清华-伯克利深圳学院筹备办公室 | A kind of sewage water treatment method of pneumatic type biological rotary cage equipment and high-efficiency biological denitrification |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2020239141A1 (en) * | 2019-05-29 | 2020-12-03 | 清华-伯克利深圳学院筹备办公室 | Pneumatic biological rotary cage device and sewage treatment method realizing efficient biological nitrogen removal |
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Application publication date: 20191213 |