Enhanced anaerobic phosphorus removal device

Abstract

The invention relates to an enhanced phosphorus removal anaerobic device, which comprises a hollow tower body and a degassing device. Wastewater mixed liquid with activated sludge enters the lower layer area of the hollow tower body, rises in the hollow tower body and enters a degassing hood, and a stirring device is started. The output end of the stirring device rotates at a high speed. The mixed liquid in the degassing hood generates centrifugal force due to the high-speed rotation of the stirring device, and a negative pressure vortex is formed in the center of the mixed liquid. Dissolved oxygen in the mixed liquid is separated upward from the center of the vortex, and the mixed liquid is dispersed from all sides of the vortex. The mixed liquid forms an absolute anaerobic environment. Due to the absolute anaerobic environment, polyphosphate bacteria in the sludge release all phosphorus in the body. The sludge and wastewater that have released all phosphorus are subsequently discharged into an aerobic pool. Since the polyphosphate bacteria have released all phosphorus in the body, more phosphorus in the wastewater can be absorbed in the aerobic pool, thereby enhancing the phosphorus absorption effect of the polyphosphate bacteria and improving the phosphorus removal efficiency of the entire system.

Description

Technical Field

[0001] The present invention relates to the technical field of biological phosphorus removal, in particular to an enhanced anaerobic phosphorus removal device. Background Art

[0002] Existing biological phosphorus removal systems include anaerobic tanks and aerobic tanks, which mainly rely on polyphosphate bacteria in activated sludge. It includes two processes: in an anaerobic environment, polyphosphate bacteria use the energy released by decomposing phosphorus particles in the body to convert volatile fatty acids into PHB and store them in the body; in an aerobic or anoxic environment, polyphosphate bacteria decompose PHB in the body to generate energy for their own cell growth and absorb excess phosphorus in the water to synthesize phosphorus particles and store them in the cells. As the excess polyphosphate-rich sludge is removed, phosphorus removal is completed. When the sludge and wastewater enter the anaerobic tank, due to the presence of a certain amount of dissolved oxygen in the sludge and wastewater, an absolute anaerobic environment cannot be guaranteed, which affects the full release of phosphorus by the polyphosphate bacteria in the sludge, resulting in poor phosphorus absorption and low phosphorus removal effect by the polyphosphate bacteria in the subsequent aerobic tank.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the embodiments of the present invention disclose an enhanced anaerobic phosphorus removal device to solve the problem that there is a certain amount of dissolved oxygen in sludge and wastewater, which cannot ensure an absolute anaerobic environment, affecting the full release of phosphorus by polyphosphate bacteria in the sludge, resulting in poor phosphorus absorption effect of polyphosphate bacteria in the subsequent aerobic tank and low phosphorus removal effect.

[0005] The technical solutions adopted in the present invention are as follows:

[0006] An enhanced anaerobic phosphorus removal device is used in an aerobic tank. The enhanced anaerobic phosphorus removal device includes a hollow tower body and a degassing device. A partition is provided in the hollow tower body, and the partition separates the interior of the hollow tower body into an upper area and a lower area. The bottom of the lower area has a water inlet; the degassing device includes a degassing hood and a stirring device. The degassing hood is provided in the hollow tower body, and the degassing hood passes through the partition and connects the upper area and the lower area; the stirring device is provided on the hollow tower body, and the output end of the stirring device passes through the hollow tower body and extends into the degassing hood.

[0007] Its further technical solution is that the degassing hood includes a hood body and a separator, the hood body is located above the partition, the separator is located below the partition, the hood body is connected to the separator, the hood body has an opening, the output end of the stirring device extends into the hood body from the opening, the separator has a slot, the wastewater with activated sludge enters the separator from the slot to separate the sludge and liquid.

[0008] A further technical solution is that the separator is an inclined plate separator, a bucket is provided at the bottom of the separator, and a pipeline at the bottom of the bucket is connected to an aerobic tank;

[0009] The separated sludge is deposited in the bucket and flows back to the aerobic tank through the pipeline, and the separated liquid rises and enters the cover.

[0010] Its further technical solution is that the stirring device includes a motor, a rotating shaft and several blades. The motor is arranged at the top of the hollow tower body, the output end of the motor is connected to the upper end of the rotating shaft, the lower end of the rotating shaft passes through the hollow tower body and extends into the degassing hood, and several blades are arranged in a ring on the outside of the lower end of the rotating shaft.

[0011] A further technical solution is that the lower layer area is further filled with a fluidized filler, the fluidized filler has pores, and the fluidized filler is located below the bucket.

[0012] A further technical solution is that the fluidized filler is a Ca- and Mg-based composite filler.

[0013] A further technical solution is that an inner reflux pipe is provided on the outer side of the hollow tower body, and the inner reflux pipe connects the upper layer area with the lower layer area.

[0014] A further technical solution is that an overflow trough is provided at the top of the upper area, and a plurality of overflow holes are provided on the overflow trough.

[0015] The beneficial effects of the embodiments of the present invention are as follows:

[0016] (1) The enhanced phosphorus removal anaerobic device includes a hollow tower body and a degassing device. The wastewater mixture with activated sludge enters the lower area of the hollow tower body through the water inlet. The mixed liquid rises in the lower area of the hollow tower body and enters the degassing hood. The stirring device is started, and the output end of the stirring device rotates at a high speed. The mixed liquid in the degassing hood generates centrifugal force due to the high-speed rotation of the stirring device. A negative pressure vortex is formed in the center of the mixed liquid. The dissolved oxygen in the mixed liquid separates upward from the center of the vortex, and the mixed liquid spreads to all sides from the center of the vortex. The mixed liquid forms an absolute anaerobic environment. Due to the absolute anaerobic environment, the polyphosphate bacteria in the sludge release all the phosphorus in the body. The sludge and wastewater that have released all the phosphorus are subsequently discharged into the aerobic tank. Since the polyphosphate bacteria have released all the phosphorus in the body, more phosphorus in the wastewater can be absorbed in the aerobic tank, thereby enhancing the phosphorus absorption effect of the polyphosphate bacteria and improving the phosphorus removal efficiency of the entire system.

[0017] (2) Furthermore, the lower layer is filled with fluidized fillers, which have pores. The fluidized fillers absorb volatile fatty acids in the wastewater, causing the volatile fatty acids to gather in the pores of the fillers. Polyphosphate bacteria absorb volatile fatty acids. Since polyphosphate bacteria are attracted by volatile fatty acids, when the sludge passes through the fluidized fillers, the polyphosphate bacteria in the sludge multiply in large quantities. The fluidized filler is a Ca, Mg-based composite filler. Since the Ca, Mg-based composite filler is filled in the lower layer, it provides the polyphosphate bacteria with the Ca required to form polyphosphate. 2+ and Mg 2+ The combined ion substances cause the polyphosphate bacteria in the sludge to multiply in large quantities, increase the number of polyphosphate bacteria in the sludge, and greatly improve the phosphorus removal effect in the subsequent aerobic tank.

[0018] (3) Furthermore, a bucket is provided at the bottom of the separator, and the fluidized filler is located below the bucket. Since the fluidized filler is easily broken and brought into the degassing hood when the mixed liquid passes through the fluidized filler, the bucket blocks the fluidized filler from entering the degassing hood, and the fluidized filler is arranged below the bucket to avoid the breakage of the fluidized filler, thereby increasing the service life of the fluidized filler.

[0019] (IV) Furthermore, due to the centrifugal force generated by the high-speed rotation of the stirring device, the liquid rises, which has a liquid lifting effect. By setting up an internal reflux pipe, a high head difference is generated inside the liquid to achieve radial inward reflux of the liquid, thereby accelerating the upward flow rate, which is beneficial for the filler to form a fluidized state and increase the full contact between the filler and the incoming wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the internal structure of the enhanced anaerobic phosphorus removal device of the present invention.

[0021] Figure 2 This is a schematic diagram of the internal structure of the stirring device in the enhanced phosphorus removal anaerobic device of the present invention.

[0022] Figure 3 This is a schematic diagram of the internal structure of the degassing hood in the enhanced anaerobic phosphorus removal device of the present invention.

[0023] In the picture:

[0024] 1. Hollow tower body; 11. Partition; 12. Upper zone; 13. Lower zone; 14. Fluidized packing; 15. Overflow trough; 16. Overflow hole; 2. Degassing device; 21. Degassing hood; 211. Hood body; 212. Separator; 213. Opening; 214. Notch; 215. Bucket; 22. Stirring device; 221. Motor; 222. Rotating shaft; 223. Blades; 3. Internal reflux pipe; 4. Aerobic tank. DETAILED DESCRIPTION

[0025] The specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0026] In order to make the purpose, technical solutions and advantages of the present invention clearer, the device proposed in the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will be clearer. It should be noted that the drawings are in a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, please refer to the drawings. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no technical substantive significance. Any structural modification, change in proportional relationship or adjustment of size, without affecting the efficacy and purpose that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention.

[0027] Example:

[0028] Figure 1 This is a schematic diagram of the internal structure of the enhanced anaerobic phosphorus removal device of the present invention. Figure 1 As shown, the enhanced phosphorus removal anaerobic device is used for the aerobic tank 4. The enhanced phosphorus removal anaerobic device includes a hollow tower body 1 and a degassing device 2. A partition 11 is provided in the hollow tower body 1. The partition 11 divides the interior of the hollow tower body 1 into an upper area 12 and a lower area 13. The upper area 12 has a water outlet and the lower area 13 has a water inlet.

[0029] Figure 2 This is a schematic diagram of the internal structure of the stirring device in the enhanced phosphorus removal anaerobic device of the present invention. Figures 1-2 As shown, the degassing device 2 includes a degassing hood 21 and a stirring device 22. The degassing hood 21 is arranged in the hollow tower body 1. The degassing hood 21 passes through the partition 11 and connects the upper layer area 12 and the lower layer area 13. The stirring device 22 is arranged on the hollow tower body 1, and the output end of the stirring device 22 passes through the hollow tower body 1 and extends into the degassing hood 21. Exemplarily, the stirring device 22 includes a motor 221, a rotating shaft 222 and a plurality of blades 223. The motor 221 is arranged at the top of the hollow tower body 1, the output end of the motor 221 is connected to the upper end of the rotating shaft 222, and the lower end of the rotating shaft 222 passes through the hollow tower body 1 and extends into the degassing hood 21. The plurality of blades 223 are annularly arranged on the outer side of the lower end of the rotating shaft 222.

[0030] Figure 3 This is a schematic diagram of the internal structure of the degassing hood in the enhanced phosphorus removal anaerobic device of the present invention. Figure 1 and Figure 3As shown, further, the degassing hood 21 includes a hood body 211 and a separator 212. The hood body 211 is located above the partition 11, and the separator 212 is located below the partition 11. The hood body 211 is connected to the separator 212. The hood body 211 has an opening 213. The output end of the stirring device 22 extends into the hood body 211 from the opening 213. The separator 212 has a notch 214. The wastewater with activated sludge enters the separator 212 from the notch 214 to separate the sludge and liquid. Due to the high-speed rotation of the stirring device 22, a centrifugal force is generated, and a negative pressure vortex is formed in the center of the mixed liquid. The dissolved oxygen in the mixed liquid is separated upward from the center of the vortex, and the liquid is dispersed from all sides of the vortex and flows into the upper area 12 from the opening 213. Exemplarily, the separator 212 is an inclined plate separator, and a bucket 215 is provided at the bottom of the separator 212. The bottom pipeline of the bucket 215 is connected to the aerobic tank 4. The separated sludge is deposited in the bucket 215 and flows into the aerobic tank 4 through the pipeline. The separated liquid rises and enters the cover 211. Since the polyphosphate-accumulating bacteria release all the phosphorus in their bodies under the anaerobic environment, the activated sludge containing the polyphosphate-accumulating bacteria is separated by the inclined plate separator 212 and deposited in the bucket 215 and returned to the aerobic zone, where it fully absorbs the phosphorus in the wastewater.

[0031] like Figure 1 As shown, further, the lower area 13 is filled with a fluidized filler 14, which has pores and is located below the bucket 215. The fluidized filler 14 absorbs volatile fatty acids in the wastewater, causing the volatile fatty acids to accumulate in the pores of the filler, and the polyphosphate bacteria absorb the volatile fatty acids. Since the polyphosphate bacteria are attracted by the volatile fatty acids, when the sludge passes through the fluidized filler 14, the polyphosphate bacteria in the sludge multiply in large quantities. Exemplarily, the fluidized filler 14 is a Ca, Mg-based composite filler. Since the Ca, Mg-based composite filler is filled in the lower area 13, the polyphosphate bacteria are provided with the Ca required to form polyphosphate. 2+ and Mg 2+ The combined ionic substances cause the polyphosphate bacteria in the sludge to multiply in large quantities, thereby increasing the number of polyphosphate bacteria in the sludge and greatly improving the phosphorus removal effect in the subsequent aerobic tank 4.

[0032] like Figure 1 As shown, further, an inner reflux pipe 3 is provided on the outer side of the hollow tower body 1, and the inner reflux pipe 3 connects the upper zone 12 and the lower zone 13. Due to the centrifugal force generated by the high-speed rotation of the stirring device 22, the liquid rises, which has the effect of lifting the liquid. By providing the inner reflux pipe 3, a high head difference is generated inside the liquid to realize the radial inward reflux of the liquid, thereby accelerating the upward flow rate, which is beneficial for the filler to form a fluidized state and increase the full contact between the filler and the incoming wastewater. Part of the liquid in the upper zone 12 flows back from the inner reflux pipe 3 to the lower zone 13, increasing the overall rising speed of the mixed liquid in the tower body and improving the phosphorus removal efficiency.

[0033] like Figure 1 As shown, further, an overflow trough 15 is provided at the top of the upper area 12, and a plurality of overflow holes 16 are provided on the overflow trough 15. The liquid in the upper area 12 gradually rises to the height of the overflow holes 16, flows into the overflow trough 15 from the overflow holes 16, and the liquid in the overflow trough 15 is discharged into the aerobic tank 4 for phosphorus absorption treatment by polyphosphate bacteria.

[0034] When this embodiment is working:

[0035] The wastewater mixture with activated sludge enters the lower layer 13 from the water inlet at the bottom of the hollow tower body 1, and the mixture passes through the fluidized filler 14. The fluidized filler 14 absorbs the volatile fatty acids in the wastewater, causing the volatile fatty acids to accumulate in the pores of the filler. The polyphosphate bacteria absorb the volatile fatty acids. Since the polyphosphate bacteria are attracted by the volatile fatty acids, the polyphosphate bacteria in the sludge multiply in large quantities, and the fluidized filler 14 provides the polyphosphate bacteria with the Ca required to form polyphosphate. 2+ and Mg 2+ The mixed liquid enters the separator 212 from the slot 214, and the motor 221 is started. The motor 221 drives the shaft 222 with blades 223 to rotate at high speed. The high-speed rotation of the blades 223 generates centrifugal force in the separator 212 and the cover 211, and a negative pressure vortex is formed in the center of the mixed liquid. The dissolved oxygen in the mixed liquid is separated from the center of the vortex upward, and the mixed liquid forms an absolute anaerobic environment. The polyphosphate bacteria in the sludge release all the phosphorus in the body due to the absolute anaerobic environment. Since the separator 212 is a slanted plate separator, the activated sludge is deposited in the bucket 215 by the separator 212, and the liquid The liquid disperses from all sides of the vortex and overflows out of the upper area 12 from the opening 213. Part of the liquid in the upper area 12 flows back from the internal reflux pipe 3 to the lower area 13, forming internal reflux to increase the rising velocity of the mixed liquid in the tower. The separated liquid gradually rises to the height of the overflow hole 16 and flows into the overflow trough 15 from the overflow hole 16. The liquid in the overflow trough 15 is discharged into the aerobic tank 4 from the water outlet. At the same time, the sludge deposited in the bucket 215 is also discharged into the aerobic tank 4 through the pipeline. Since the polyphosphate bacteria in the sludge release all the phosphorus in the body, a large amount of phosphorus in the liquid is absorbed in the aerobic tank 4, completing the phosphorus removal work.

[0036] In this embodiment, the wastewater mixture with activated sludge enters the lower layer area 13 of the hollow tower body 1, the mixed liquid rises in the hollow tower body 1 and enters the degassing hood 21, the stirring device 22 is started, and the output end of the stirring device 22 rotates at a high speed. The mixed liquid in the degassing hood 21 generates centrifugal force due to the high-speed rotation of the stirring device 22, and a negative pressure vortex is formed in the center of the mixed liquid. The dissolved oxygen in the mixed liquid separates upward from the center of the vortex, and the mixed liquid spreads out from all around the vortex. The mixed liquid forms an absolute anaerobic environment. Due to the absolute anaerobic environment, the polyphosphate bacteria in the sludge release all the phosphorus in the body and release all the The sludge and wastewater containing phosphorus subsequently enter the aerobic tank 4. Since the polyphosphate bacteria release all the phosphorus in their bodies, they can absorb more phosphorus in the wastewater in the aerobic tank 4, thereby enhancing the phosphorus absorption effect of the polyphosphate bacteria and improving the phosphorus removal efficiency of the entire system. Furthermore, since the mixed liquid passes through the fluidized filler 14 and enters the degassing hood 21, the fluidized filler 14 is easily broken and brought into the degassing hood 21. By providing the bucket 215, the fluidized filler 14 is blocked from entering the degassing hood 21, and the fluidized filler 14 is provided below the bucket 215 to avoid the breakage of the fluidized filler 14, thereby increasing the service life of the fluidized filler 14.

[0037] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. An enhanced anaerobic phosphorus removal device, characterized in that: For use in aerobic pools (4), including: A hollow tower body (1), wherein a partition (11) is provided inside the hollow tower body (1), wherein the partition (11) separates the interior of the hollow tower body (1) into an upper zone (12) and a lower zone (13), wherein the top of the upper zone (12) has a water outlet, and the bottom of the lower zone (13) has a water inlet; an inner reflux pipe (3) is provided on the outside of the hollow tower body (1), wherein the inner reflux pipe (3) connects the upper zone (12) and the lower zone (13); an overflow trough (15) is provided at the top of the upper zone (12), and a plurality of overflow holes (16) are provided on the overflow trough (15); A degassing device (2), the degassing device (2) comprising: A degassing hood (21), the degassing hood (21) being arranged in the hollow tower body (1), the degassing hood (21) passing through the partition (11) and communicating with the upper layer area (12) and the lower layer area (13); a stirring device (22), the stirring device (22) being arranged on the hollow tower body (1), and an output end of the stirring device (22) passing through the hollow tower body (1) and extending into the degassing hood (21); The degassing hood (21) comprises a hood body (211) and a separator (212), wherein the hood body (211) is located above the partition (11), and the separator (212) is located below the partition (11), and the hood body (211) is connected to the separator (212), and the hood body (211) has an opening (213), and the output end of the stirring device (22) extends into the hood body (211) from the opening (213), and the separator (212) has a notch (214), and wastewater containing activated sludge enters the separator (212) from the notch (214) to separate the sludge and liquid; The separator (212) is an inclined plate separator (212), and a bucket (215) is provided at the bottom of the separator (212). The bottom of the bucket (215) is connected to a pipeline, and the pipeline is connected to the aerobic tank (4); The separated sludge is deposited in the bucket (215), flows through the pipeline into the aerobic tank (4), and the separated liquid rises and enters the cover (211); The stirring device (22) comprises a motor (221), a rotating shaft (222) and a plurality of blades (223); the motor (221) is arranged at the top of the hollow tower body (1); the output end of the motor (221) is connected to the upper end of the rotating shaft (222); the lower end of the rotating shaft (222) passes through the hollow tower body (1) and extends into the degassing hood (21); and the plurality of blades (223) are annularly arranged on the outer side of the lower end of the rotating shaft (222); The lower layer area (13) is also filled with a fluidized filler (14), the fluidized filler (14) has pores, and the fluidized filler (14) is located below the bucket (215).

2. The enhanced anaerobic phosphorus removal device according to claim 1, characterized in that: The fluidized filler (14) is a Ca- and Mg-based composite filler.

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