Device for efficiently treating livestock and poultry breeding sewage

Abstract

The utility model relates to a device for efficiently treating livestock and poultry breeding sewage. The device comprises a water collecting tank, a solid-liquid separator, a regulating tank, an anaerobic treatment tank, a pre-aeration tank, an anaerobic ammonia oxidation tank, a sedimentation tank, an intermediate water tank, struvite equipment, an ozone oxidation tower, a clean water tank and the like which are connected in sequence. According to the device for efficiently treating the livestock and poultry breeding sewage, deep standard treatment of the livestock and poultry breeding sewage can be realized, the recycled struvite product can be used as an agricultural fertilizer, and the device has excellent practicability.

Description

Technical Field

[0001] The utility model relates to a sewage treatment device, in particular to a device for efficiently treating livestock and poultry breeding sewage. Background Art

[0002] Livestock and poultry breeding wastewater mainly comes from urine, all feces or residual feces and feed residues, flushing water and wastewater generated by workers' lives and production processes in livestock and poultry farms. It has the characteristics of high COD, ammonia nitrogen, total nitrogen and total phosphorus content. It is difficult to treat and has high treatment costs, requiring high equipment and treatment costs. Utility Model Content

[0003] In view of the above problems, the utility model provides a device for efficiently treating livestock and poultry breeding wastewater. On the basis of conventional solid-liquid separation and traditional anaerobic treatment, it is composed of a pre-aeration tank, an anaerobic ammonia oxidation tank, a sedimentation tank, a phosphorus recovery device (struvite equipment), an ozone oxidation tower and a biological filter, among which the biological filter is not a must (configured according to water quality requirements). After the treatment, not only COD, BOD, SS, ammonia nitrogen, total nitrogen and total phosphorus in the water body can meet the corresponding emission requirements, but the struvite products produced by the struvite equipment can be used as high-quality slow-release nitrogen and phosphorus fertilizers for agricultural production.

[0004] In order to solve the technical problem that livestock and poultry breeding wastewater is difficult to treat due to high nitrogen and phosphorus content, the utility model adopts the following solutions:

[0005] A device for efficiently treating livestock and poultry wastewater, comprising a water collection tank, a solid-liquid separator, a regulating tank, an anaerobic treatment tank, a pre-aeration tank, an anaerobic ammonia oxidation tank, a sedimentation tank, an intermediate water tank, a struvite device, an ozone oxidation tower, a clear water tank and a sludge tank connected in sequence, wherein:

[0006] The water collection tank is used to collect livestock and poultry breeding sewage, the outlet of the water collection tank is connected to the inlet of the solid-liquid separator, the outlet of the solid-liquid separator is connected to the inlet of the regulating tank, the outlet of the regulating tank is connected to the inlet of the anaerobic treatment tank, the bottom solid phase outlet of the anaerobic treatment tank is connected to the sludge tank, the top liquid phase outlet of the anaerobic treatment tank is connected to the inlet of the pre-aeration tank, the outlet of the pre-aeration tank is connected to the inlet of the anaerobic ammonia oxidation tank, the anaerobic ammonia oxidation tank and the pre-aeration tank are respectively connected to an aeration device, the outlet of the anaerobic ammonia oxidation tank is connected to the inlet of the sedimentation tank, the solid phase outlet at the bottom of the sedimentation tank is connected to the sludge tank, and the outlet of the sludge tank is connected to a dehydrator;

[0007] The liquid phase outlet of the sedimentation tank is connected to the inlet of the intermediate water tank, the intermediate water tank is connected to the water inlet of the struvite equipment through a water pump, the solid phase outlet of the struvite equipment is connected to the struvite product warehouse, the liquid phase outlet at the top of the struvite equipment is connected to the inlet at the bottom of the ozone oxidation tower, the bottom of the ozone oxidation tower is connected to the ozone generator through a pipeline, and the outlet at the top of the ozone oxidation tower is connected to the clear water tank.

[0008] Furthermore, braided curtain fillers and suspended fillers are installed in the anaerobic ammonium oxidation tank, a membrane aeration plate is installed at the bottom of the anaerobic ammonium oxidation tank, and an underwater mixer is arranged at the bottom of the anaerobic ammonium oxidation tank.

[0009] Furthermore, the anaerobic ammonia oxidation tank is composed of a reaction unit from bottom to top by the diaphragm aeration disk, the filler and the underwater mixer, and the anaerobic ammonia oxidation tank contains 3-5 reaction units connected in series, and the mixed liquid of the last reaction unit is refluxed to the first reaction unit through the bottom reflux port and the water pump.

[0010] Furthermore, a braided curtain filler and a membrane aeration plate are installed in the pre-aeration tank.

[0011] Furthermore, a sludge return pipe is arranged in the sedimentation tank behind the anaerobic ammonium oxidation tank to return sludge to the first reaction unit of the anaerobic ammonium oxidation tank.

[0012] Furthermore, the liquid phase outlet of the ozone oxidation tower is connected to a biological filter, and then connected to the clean water tank; the biological filter is provided with filter fillers or phosphorus removal filter materials.

[0013] By adopting the above-mentioned technical scheme, the utility model can significantly reduce the content of carbon, nitrogen and phosphorus pollutants in sewage compared with the prior art, and obtain a struvite product, which has practical value and environmental protection significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure provided by Example 1 of the utility model;

[0015] Figure 2 It is a structural schematic diagram provided in Example 2 of the present utility model. DETAILED DESCRIPTION

[0016] The technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments, but those skilled in the art will understand that the embodiments described below are part of the embodiments of the utility model, rather than all of the embodiments, and are only used to illustrate the utility model, and should not be regarded as limiting the scope of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. If the specific conditions are not indicated in the embodiments, they shall be carried out according to conventional conditions or conditions recommended by the manufacturer.

[0017] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0018] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] Embodiment 1:

[0020] refer to Figure 1 , a device for efficiently treating livestock and poultry wastewater, comprising a water collection tank 1, a solid-liquid separator 2, a regulating tank 3, an anaerobic treatment tank 4, a pre-aeration tank 5, an anaerobic ammonia oxidation tank 6, a sedimentation tank 7, an intermediate water tank 8, a struvite device 9, an ozone oxidation tower 10 and a clear water tank 12 connected in sequence, wherein,

[0021] The water collecting tank 1 is used to collect livestock and poultry breeding sewage, the outlet of the water collecting tank 1 is connected to the inlet of the solid-liquid separator 2, the outlet of the solid-liquid separator 2 is connected to the inlet of the regulating tank 3, the outlet of the lifting pump of the regulating tank 3 is connected to the inlet of the anaerobic treatment tank 4, the bottom solid phase outlet of the anaerobic treatment tank 4 is connected to the sludge tank 13, the liquid phase outlet of the anaerobic treatment tank 4 is connected to the inlet of the pre-aeration tank 5, the outlet of the pre-aeration tank 5 is connected to the inlet of the anaerobic ammonia oxidation tank 6, the anaerobic ammonia oxidation tank 6 and the pre-aeration tank 5 are respectively connected to an aeration device 15, the outlet of the anaerobic ammonia oxidation tank 6 is connected to the inlet of the sedimentation tank 7, the solid phase outlet at the bottom of the sedimentation tank 7 is connected to the sludge tank 13, and the outlet of the sludge tank 13 is connected to a dehydrator 14;

[0022] The liquid phase outlet of the sedimentation tank 7 is connected to the inlet water tank of the intermediate water tank 8, the outlet of the intermediate water tank 8 is connected to the struvite equipment 9, the solid phase outlet of the struvite equipment 9 is connected to the struvite product warehouse, the liquid phase outlet of the struvite equipment 9 is connected to the inlet of the ozone oxidation tower 10, the ozone oxidation tower 10 is connected to the ozone generator 16, and the outlet of the ozone oxidation tower 10 is connected to the clear water tank 12.

[0023] The anaerobic ammonia oxidation tank 6 is equipped with a braided curtain filler and a suspended filler, a membrane aeration disk is installed at the bottom of the anaerobic ammonia oxidation tank 6, and an underwater mixer is arranged inside the anaerobic ammonia oxidation tank 6. The anaerobic ammonia oxidation tank 6 is spatially composed of the filler, the underwater mixer and the membrane aeration disk to form a reaction unit from bottom to top. Usually, the anaerobic ammonia oxidation tank 6 includes 3-5 reaction units connected in series, and the mixed liquid reflux port at the bottom of the last reaction unit is refluxed to the first reaction unit through a water pump, that is, internal circulation reflux.

[0024] In the above-mentioned anaerobic ammonium oxidation tank 6, the filler is mainly used to attach activated sludge, providing a fixed living place for various bacteria such as anaerobic ammonium oxidizing bacteria, nitrifying bacteria, nitrite bacteria, short-range denitrifying bacteria and denitrifying bacteria. Based on a similar principle, the membrane aeration disk and the braided curtain filler in the pre-aeration tank 5 are mainly used to remove dissolved CO2 and some easily degradable organic matter in the anaerobic effluent.

[0025] In order to increase the biochemical treatment effect, a passage for mixed liquid reflux is provided in the anaerobic ammonia oxidation tank 6, that is, the mixed liquid that has undergone staged treatment in the anaerobic ammonia oxidation tank 6 is refluxed to the front end through a reflux pump for repeated biochemical treatment.

[0026] As the water body is gradually treated, the content of beneficial bacteria in the separated sludge gradually increases. Therefore, in order to recycle this part of the activated sludge for reuse, the bottom solid phase outlet of the sedimentation tank 7 is connected to the anaerobic ammonia oxidation tank 6 to achieve partial sludge return, that is, external circulation return.

[0027] In the above-mentioned device, the struvite equipment 9 operates according to the technical parameters of "A struvite fluidized crystallization device" (ZL201621141403.9) and "A method and system for recovering struvite from wastewater produced by wood activated carbon" (ZL201910277088.4) to achieve the recovery and resource utilization of nitrogen, phosphorus and magnesium elements.

[0028] Embodiment 2:

[0029] refer to Figure 2 , a device for efficiently treating livestock and poultry wastewater, comprising a collection tank 1, a solid-liquid separator 2, a regulating tank 3, an anaerobic treatment tank 4, a pre-aeration tank 5, an anaerobic ammonia oxidation tank 6, a sedimentation tank 7, an intermediate water tank 8, a struvite device 9, an ozone oxidation tower 10, a biological filter 11 and a clear water tank 12 connected in sequence, wherein,

[0030] The water collecting tank 1 is used to collect livestock and poultry breeding sewage, the outlet of the water collecting tank 1 is connected to the inlet of the solid-liquid separator 2, the outlet of the solid-liquid separator 2 is connected to the inlet of the regulating tank 3, the outlet of the lifting pump of the regulating tank 3 is connected to the inlet of the anaerobic treatment tank 4, the bottom solid phase outlet of the anaerobic treatment tank 4 is connected to the sludge tank 13, the liquid phase outlet of the anaerobic treatment tank 4 is connected to the inlet of the pre-aeration tank 5, the outlet of the pre-aeration tank 5 is connected to the inlet of the anaerobic ammonia oxidation tank 6, the anaerobic ammonia oxidation tank 6 and the pre-aeration tank 5 are respectively connected to an aeration device 15, the outlet of the anaerobic ammonia oxidation tank 6 is connected to the inlet of the sedimentation tank 7, the solid phase outlet at the bottom of the sedimentation tank 7 is connected to the sludge tank 13, and the outlet of the sludge tank 13 is connected to a dehydrator 14;

[0031] The liquid phase outlet of the sedimentation tank 7 is connected to the inlet pool of the intermediate water pool 8, the intermediate water pool 8 is connected to the struvite equipment 9 through a water pump, the solid phase outlet of the struvite equipment 9 is connected to the struvite product warehouse, the liquid phase outlet of the struvite equipment 9 is connected to the inlet of the ozone oxidation tower 10, the ozone oxidation tower 10 is connected to the ozone generator 16, the outlet of the ozone oxidation tower 10 is connected to the biological filter 11, the biological filter 11 is provided with ceramsite filter material, and the water further treated by filtration, nitrification and denitrification enters the clear water tank 12.

[0032] The above-mentioned device is suitable for livestock and poultry breeding wastewater with high ammonia nitrogen content, for example, ammonia nitrogen content greater than 1000 mg / L, wherein the struvite equipment 9 operates according to the technical parameters of "A struvite fluidized crystallization device" (ZL201621141403.9) and "A method and system for recovering struvite from wood activated carbon production wastewater" (ZL201910277088.4).

[0033] In practice, after the sewage of a certain pig farm is treated by the above equipment, the water quality content in the clear water tank 12 is as follows: COD is less than 380mg / L, ammonia nitrogen is less than 70mg / L, total phosphorus is less than 7mg / L, SS is less than 160mg / L, and total nitrogen is less than 300mg / L (total nitrogen removal rate is greater than 80%). Therefore, the water in the clear water tank 12 is used as a water source for filter flushing and drug dispensing, for example, the water in the clear water tank 12 is reused for backwashing of the denitrification filter 11, or reused in the regulating tank 3.

[0034] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A device for efficiently treating livestock and poultry breeding wastewater, characterized in that: It includes a water collection tank, a solid-liquid separator, a regulating tank, an anaerobic treatment tank, a pre-aeration tank, an anaerobic ammonia oxidation tank, a sedimentation tank, an intermediate water tank, a struvite device, an ozone oxidation tower and a clear water tank, which are connected in sequence. The water collection tank is used to collect livestock and poultry breeding sewage, the outlet of the water collection tank is connected to the inlet of the solid-liquid separator, the outlet of the solid-liquid separator is connected to the inlet of the regulating tank, the outlet of the lifting pump of the regulating tank is connected to the inlet of the anaerobic treatment tank, the bottom solid phase outlet of the anaerobic treatment tank is connected to the sludge tank, the liquid phase outlet of the anaerobic treatment tank is connected to the inlet of the pre-aeration tank, the outlet of the pre-aeration tank is connected to the inlet of the anaerobic ammonia oxidation tank, the anaerobic ammonia oxidation tank and the pre-aeration tank are respectively connected to an aeration device, the outlet of the anaerobic ammonia oxidation tank is connected to the inlet of the sedimentation tank, the solid phase outlet at the bottom of the sedimentation tank is connected to the sludge tank, and the outlet of the sludge tank is connected to a dehydrator; The liquid phase outlet of the sedimentation tank is connected to the inlet water tank of the intermediate water tank, the outlet of the intermediate water tank is connected to the struvite equipment, the solid phase outlet of the struvite equipment is connected to the struvite product warehouse, the liquid phase outlet of the struvite equipment is connected to the inlet of the ozone oxidation tower, the ozone oxidation tower is connected to the ozone generator, and the outlet of the ozone oxidation tower is connected to the clear water tank.

2. The device for efficiently treating livestock and poultry breeding wastewater according to claim 1 is characterized in that: Braided curtain fillers and suspended fillers are installed in the anaerobic ammonium oxidation tank, a membrane aeration plate is installed at the bottom of the anaerobic ammonium oxidation tank, and an underwater mixer is arranged inside the anaerobic ammonium oxidation tank.

3. The device for efficiently treating livestock and poultry breeding wastewater according to claim 1 is characterized in that: Braided curtain filler and membrane aeration plate are installed in the pre-aeration tank.

4. The device for efficiently treating livestock and poultry breeding wastewater according to claim 1 is characterized in that: A passage for mixed liquid reflux is arranged in the anaerobic ammonium oxidation tank.

5. The device for efficiently treating livestock and poultry breeding wastewater according to claim 4 is characterized in that: The bottom solid phase outlet of the sedimentation tank is connected to the anaerobic ammonia oxidation tank to achieve partial sludge return.

6. The device for efficiently treating livestock and poultry breeding wastewater according to claim 1 is characterized in that: The liquid phase outlet of the ozone oxidation tower is connected to a biological filter, and then connected to the clean water tank; the biological filter is provided with ceramsite filter material or phosphorus adsorption filler.

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