Slaughter house wastewater filtering treatment system

Abstract

The present invention relates to the technical field of slaughter house wastewater treatment, particularly to a slaughter house wastewater filtration treatment system, which comprises: a pretreatment module, which comprises a grid for filtering solid pollutants and an air flotation tank for removing grease and suspended solids; the biological treatment module is connected with the pretreatment module and comprises a hydrolysis acidification tank for decomposing the organic matters into small-molecular organic matters and an aerobic tank for decomposing and removing the small-molecular organic matters; the filtering treatment module is connected with the biological treatment module and comprises a sedimentation tank for precipitating the wastewater subjected to biological treatment and a filtering tank which is connected with the sedimentation tank and is used for filtering the precipitated wastewater; the detection module comprises an image acquisition unit arranged in the air floatation tank and water quality detection units arranged in the aerobic tank and the sedimentation tank; the control module is connected with the pretreatment module, the biological treatment module, the filtration treatment module and the detection module, and the slaughter house wastewater treatment efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of slaughterhouse wastewater treatment, and in particular to a slaughterhouse wastewater filtering and treatment system. Background Art

[0002] With the improvement of living standards and the increase in demand for meat consumption, the scale of the slaughtering industry has expanded rapidly, and the amount of wastewater discharged has also increased sharply. These wastewaters have complex components, including animal blood, grease, feces, visceral debris and inorganic salts, and have the characteristics of high chemical oxygen demand, high suspended solids, high ammonia nitrogen and high fat, posing a serious threat to the environment and ecosystem.

[0003] Chinese patent application publication number: CN107789897A, discloses a pig slaughterhouse wastewater treatment system, which includes a drainage treatment device body, an inlet, a second screen and an outlet pipe, the bottom end of the inlet is connected to the screening pipeline through the first drainage pipe, the internal top of the drainage treatment device body is provided with a cylinder, one end of the screening pipeline is connected to the sedimentation box through the second drainage pipe, a driving rod is provided on the left side of the first connecting rod, the first fixed rod and the second fixed rod are inserted into the interior of the fixed plate, the upper surface of the second screen is connected to the second connecting rod through a connecting rope, the two ends of the telescopic baffle are respectively fixed on the first support plate and the second support plate, and the outlet pipe is inserted into the right wall of the sedimentation box. This kind of slaughter wastewater and debris screening and drainage treatment device, a solid-liquid impurity separation device is provided inside the drainage treatment device body, and the waste, hair or wastewater generated during slaughtering are screened. It can be seen that the above technical solution only separated the solid and liquid of the slaughterhouse wastewater, and did not further treat the liquid, resulting in the presence of suspended matter, ammonia nitrogen, oil and other pollutants in the wastewater. Summary of the invention

[0004] To this end, the present invention provides a slaughterhouse wastewater filtration and treatment system to overcome the problem in the prior art that the lack of detection in the slaughterhouse wastewater treatment process leads to substandard wastewater treatment and low efficiency.

[0005] To achieve the above object, the present invention provides a slaughterhouse wastewater filtration treatment system, comprising: Pre-treatment module, including screens to filter solid pollutants and flotation tanks to remove grease and suspended solids; A biological treatment module, which is connected to the pretreatment module, and includes a hydrolysis acidification tank for decomposing organic matter into small molecular organic matter and an aerobic tank for decomposing and removing small molecular organic matter, wherein the aerobic tank is connected to the hydrolysis acidification tank; A filtration treatment module, which is connected to the biological treatment module, and includes a sedimentation tank for sedimenting the biologically treated wastewater and a filter tank connected to the sedimentation tank for filtering the precipitated wastewater; A detection module, which is connected to the pretreatment module, the biological treatment module and the filtration treatment module respectively, and includes an image acquisition unit arranged inside the flotation tank, and water quality detection units respectively arranged inside the aerobic tank and the sedimentation tank; A control module, which is respectively connected to the pretreatment module, the biological treatment module, the filtration treatment module and the detection module, and is used to determine whether the flotation treatment meets the preset standard according to the floating characteristic value of the flocculants in the flotation tank, to secondarily determine whether the flotation treatment meets the preset standard according to the turbidity of the wastewater inside the flotation tank, to determine whether the biological treatment meets the preset standard according to the water quality evaluation value of the wastewater in the sedimentation tank after sedimentation, and to determine the reason why the biological treatment does not meet the preset standard according to the water quality evaluation difference.

[0006] Furthermore, the control module determines whether the flotation treatment meets the preset standard according to the floating characteristic value of the flocculants in the flotation tank, wherein: If the buoyancy characteristic value is less than a first preset buoyancy characteristic value, it is determined that the flotation treatment does not meet the preset standard, and the bubble diameter in the flotation tank is adjusted according to the difference between the preset buoyancy characteristic value and the buoyancy characteristic value; If the floating characteristic value is greater than or equal to the first preset floating characteristic value and less than the second preset floating characteristic value, it is determined that the flotation treatment does not meet the preset standard, and the flotation treatment is secondarily determined to meet the preset standard according to the turbidity of the wastewater in the flotation tank; If the floating characteristic value is greater than or equal to the second preset floating characteristic value, it is determined that the flotation treatment meets the preset standard and biological treatment is performed.

[0007] Furthermore, the floating characteristic value is determined by the rising rate and floating ratio of the flocculants within a preset time period.

[0008] Furthermore, the control module is provided with different adjustment modes for the diameter of the bubbles in the flotation tank, and each adjustment mode has a different adjustment range for the diameter of the bubbles.

[0009] Furthermore, the control module determines whether the flotation treatment meets the preset standard based on the turbidity of the wastewater inside the flotation tank. When the turbidity is less than the preset turbidity, the flotation treatment is determined to meet the preset standard; when the turbidity is greater than or equal to the preset turbidity, the flotation treatment is determined not to meet the preset standard, and the amount of flocculant added is increased according to the difference between the turbidity and the preset turbidity.

[0010] Furthermore, the dosage of the flocculant is positively correlated with the turbidity difference, wherein the turbidity difference is the difference between the turbidity and the preset turbidity.

[0011] Furthermore, the control module determines whether the biological treatment meets the preset standard according to the water quality evaluation value of the wastewater in the sedimentation tank after sedimentation, wherein: If the water quality evaluation value is less than a first preset water quality evaluation value, it is determined that the biological treatment does not meet the preset standard, and the aeration amount in the aerobic tank is increased according to the difference between the preset dissolved oxygen concentration and the dissolved oxygen concentration in the wastewater; If the water quality evaluation value is greater than or equal to the first preset water quality evaluation value and less than the second preset water quality evaluation value, it is determined that the biological treatment does not meet the preset standard, and the reason why the biological treatment does not meet the preset standard is determined according to the difference between the water quality evaluation value and the first preset water quality evaluation value; If the water quality evaluation value is greater than or equal to the second preset water quality evaluation value, it is determined that the biological treatment meets the preset standard and filtration treatment is performed.

[0012] Furthermore, the water quality evaluation value is determined by chemical oxygen demand and biochemical oxygen demand.

[0013] Furthermore, the aeration amount in the aerobic tank is positively correlated with the dissolved oxygen concentration difference in the sedimentation tank, wherein the dissolved oxygen concentration difference is the difference between a preset dissolved oxygen concentration and the dissolved oxygen concentration in the wastewater.

[0014] Furthermore, the control module determines the reason why the biological treatment does not meet the preset standard according to the water quality evaluation difference, wherein: If the water quality evaluation difference is less than the preset water quality evaluation difference, it is determined that the reason why the biological treatment does not meet the preset standard is that the pH value in the aerobic tank deviates from the preset interval, and the pH value is adjusted to the preset interval by chemical adjustment method to inhibit the activity of aerobic microorganisms; If the water quality evaluation difference is greater than or equal to the preset water quality evaluation difference, it is determined that the reason why the biological treatment does not meet the preset standard is that the number of aerobic microorganisms in the aerobic tank does not meet the standard, and the sludge return ratio is adjusted according to the activated sludge concentration in the aerobic tank.

[0015] Compared with the prior art, the beneficial effect of the present invention lies in that the present invention includes a pretreatment module, a biological treatment module, a filtration treatment module, a detection module and a control module. Through multi-stage wastewater treatment in the pretreatment module, the biological treatment module and the filtration treatment module, different pollutants in the slaughterhouse wastewater are gradually removed. At the same time, the detection module and the control module are introduced to realize real-time monitoring and automatic adjustment of the wastewater treatment process, which effectively solves the problem of lack of detection in the slaughterhouse wastewater treatment process in the prior art, resulting in substandard wastewater treatment and low efficiency.

[0016] Furthermore, the present invention can monitor key parameters in the wastewater treatment process in real time, including the floating characteristic value of flocculants in the flotation tank, the turbidity of wastewater after flotation treatment, and the water quality evaluation value of wastewater in the sedimentation tank after sedimentation treatment, by setting an image acquisition unit inside the flotation tank and setting a water quality detection unit inside the aerobic tank and the sedimentation tank. The control module automatically adjusts the treatment parameters according to the monitoring data to ensure that each level of treatment meets the preset standards, thereby improving the efficiency and compliance rate of wastewater treatment.

[0017] Furthermore, the control module determines whether the flotation treatment meets the preset standard according to the flotation characteristic value of the flocculants. If the preset standard is not met, the bubble diameter in the flotation tank is adjusted according to the difference between the preset flotation characteristic value and the flotation characteristic value, or, based on the turbidity of the wastewater inside the flotation tank, it is secondary determined whether the flotation treatment meets the preset standard. A multi-level determination mechanism is adopted to ensure the effect of the flotation treatment.

[0018] Furthermore, the present invention determines whether the biological treatment meets the preset standards based on the water quality evaluation value of the wastewater in the sedimentation tank. If the preset standards are not met, the aeration amount in the aerobic tank is increased based on the difference between the preset dissolved oxygen concentration and the dissolved oxygen concentration in the wastewater, or the reason why the biological treatment does not meet the preset standards is determined based on the difference between the water quality evaluation value and the first preset water quality evaluation value. The aeration amount in the aerobic tank is accurately adjusted through the dissolved oxygen concentration difference to ensure the activity of aerobic microorganisms, thereby improving the decomposition efficiency of organic matter.

[0019] Furthermore, the system of the present invention can optimize resource utilization, reduce the waste of reagents and energy, and reduce operating costs by automatically adjusting parameters such as bubble diameter, flocculant dosage, and aeration volume. At the same time, the efficient operation of the system shortens the time of wastewater treatment and improves the overall treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of module connections of a slaughterhouse wastewater filtration and treatment system according to an embodiment of the present invention; Figure 2 This is a flow chart of an embodiment of the present invention for determining whether air flotation treatment meets a preset standard according to a floating characteristic value; Figure 3 This is a flow chart of an embodiment of the present invention for determining whether biological treatment meets preset standards based on water quality evaluation values; Figure 4 This is a flow chart of an embodiment of the present invention for determining the reason why biological treatment does not meet preset standards based on water quality evaluation differences. DETAILED DESCRIPTION

[0021] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0023] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0024] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] See also Figures 1 to 4 As shown, they are respectively a schematic diagram of the module connection of the slaughterhouse wastewater filtration treatment system according to an embodiment of the present invention; a flow chart of the embodiment of the present invention determining whether the flotation treatment meets the preset standard according to the buoyancy characteristic value; a flow chart of the embodiment of the present invention determining whether the biological treatment meets the preset standard according to the water quality evaluation value; a flow chart of the embodiment of the present invention determining the reason why the biological treatment does not meet the preset standard according to the water quality evaluation difference.

[0026] The slaughterhouse wastewater filtration treatment system according to the embodiment of the present invention comprises: Pre-treatment module, including screens to filter solid pollutants and flotation tanks to remove grease and suspended solids; A biological treatment module, which is connected to the pretreatment module, and includes a hydrolysis acidification tank for decomposing organic matter into small molecular organic matter and an aerobic tank for decomposing and removing small molecular organic matter, wherein the aerobic tank is connected to the hydrolysis acidification tank; A filtration treatment module, which is connected to the biological treatment module, and includes a sedimentation tank for sedimenting the biologically treated wastewater and a filter tank connected to the sedimentation tank for filtering the precipitated wastewater; A detection module, which is connected to the pretreatment module, the biological treatment module and the filtration treatment module respectively, and includes an image acquisition unit arranged inside the flotation tank, and water quality detection units respectively arranged inside the aerobic tank and the sedimentation tank; A control module, which is respectively connected to the pretreatment module, the biological treatment module, the filtration treatment module and the detection module, and is used to determine whether the flotation treatment meets the preset standard according to the floating characteristic value of the flocculants in the flotation tank, to secondarily determine whether the flotation treatment meets the preset standard according to the turbidity of the wastewater inside the flotation tank, to determine whether the biological treatment meets the preset standard according to the water quality evaluation value of the wastewater in the sedimentation tank after sedimentation, and to determine the reason why the biological treatment does not meet the preset standard according to the water quality evaluation difference.

[0027] Specifically, the image acquisition unit is an intelligent camera for monitoring the rising rate and floating ratio of flocculants in the flotation tank.

[0028] Specifically, the water quality detection unit includes a turbidity meter, a dissolved oxygen meter, a BOD meter and a COD meter, which are used to measure the turbidity of the wastewater in the flotation tank after flotation, measure the dissolved oxygen concentration in the aerobic tank, and measure the biochemical oxygen demand and chemical oxygen demand of the wastewater in the sedimentation tank after sedimentation.

[0029] Specifically, the control module determines whether the flotation treatment meets the preset standard according to the floating characteristic value of the flocculants in the flotation tank, wherein: If the buoyancy characteristic value is less than a first preset buoyancy characteristic value of 0.76, it is determined that the flotation treatment does not meet the preset standard, and the bubble diameter in the flotation tank is adjusted according to the difference between the preset buoyancy characteristic value and the buoyancy characteristic value; If the floating characteristic value is greater than or equal to the first preset floating characteristic value and less than the second preset floating characteristic value 0.82, it is determined that the flotation treatment does not meet the preset standard, and the flotation treatment is secondarily determined to meet the preset standard according to the turbidity of the wastewater in the flotation tank; If the floating characteristic value is greater than or equal to the second preset floating characteristic value, it is determined that the flotation treatment meets the preset standard and biological treatment is performed.

[0030] In the embodiment of the present invention, the first preset floating characteristic value is 0.76, and the second preset floating characteristic value is 0.82, but the above values ​​are not limited thereto, and those skilled in the art may also adjust the values ​​according to actual needs.

[0031] Specifically, the process of determining the floating characteristic value by the rising rate and floating ratio of flocculants within a preset time of 10 minutes includes: The square root of the ratio of the ascent rate to the ascent rate threshold is multiplied by the first evaluation coefficient to obtain an ascent rate evaluation value, wherein the first evaluation coefficient is 0.52 and the ascent rate threshold is 5 mm / s; The square root of the ratio of the floating ratio to the floating ratio threshold is multiplied by the second evaluation coefficient to obtain the floating ratio evaluation value, where the second evaluation coefficient is 0.45 and the floating ratio threshold is 60%; The sum of the ascending rate evaluation value and the floating ratio evaluation value is recorded as the floating characteristic value.

[0032] In the embodiment of the present invention, the preset duration is set to 10 minutes, but the value is not limited thereto, and those skilled in the art may also adjust the value according to actual needs.

[0033] Specifically, the control module is provided with different adjustment modes for the bubble diameter in the flotation tank, and each adjustment mode has a different adjustment range for the bubble diameter, wherein: If the floating characteristic difference is less than the preset floating characteristic difference of 0.03, the bubble diameter in the flotation tank is adjusted to a corresponding value using a first size adjustment coefficient of 0.98; If the floating characteristic difference is greater than or equal to the preset floating characteristic difference, the bubble diameter in the flotation tank is adjusted to a corresponding value using a second size adjustment coefficient of 0.95; The floating characteristic difference value is the difference between the preset floating characteristic value and the floating characteristic value.

[0034] In the embodiment of the present invention, the preset floating characteristic difference value is 0.03, but the above value is not limited to this, and those skilled in the art can also adjust the value according to actual needs.

[0035] In the embodiment of the present invention, the initial diameter of the aeration bubbles in the flotation tank is set to 5 mm, but the above value is not limited thereto, and those skilled in the art may also adjust the value according to actual needs.

[0036] Specifically, the diameter of the bubbles in the flotation tank is achieved by adjusting the aperture of the aerator, and the aerator is provided with a variable-pore aeration hose or an adjustable-pore aeration head, which is not specifically limited, and only needs to meet the condition of adjusting the bubble size by changing the diameter of the aeration hole.

[0037] Specifically, the control module determines whether the flotation treatment meets the preset standard based on the turbidity of the wastewater inside the flotation tank. Under the condition that the turbidity is less than the preset turbidity of 1.5NTU, the flotation treatment is determined to meet the preset standard; under the condition that the turbidity is greater than or equal to the preset turbidity, the flotation treatment is determined not to meet the preset standard, and the amount of flocculant added is increased according to the difference between the turbidity and the preset turbidity.

[0038] Specifically, the flocculant is, for example, polyaluminium chloride, and the initial dosage of the flocculant is, for example, 50 mg / L, which is not specifically limited and can be adjusted according to actual conditions.

[0039] In the embodiment of the present invention, the preset turbidity value is 1.5 NTU, but the above value is not limited thereto, and those skilled in the art may also adjust the value according to actual needs.

[0040] Specifically, the dosage of the flocculant is positively correlated with the turbidity difference, wherein: If the turbidity difference is less than the preset turbidity difference of 0.2 NTU, the dosage of the flocculant is adjusted to the corresponding value using the first dosage adjustment coefficient of 1.03; If the turbidity difference is greater than or equal to the preset turbidity difference, the dosage of the flocculant is adjusted to a corresponding value using the second dosage adjustment coefficient 1.06; The turbidity difference is the difference between the turbidity and the preset turbidity.

[0041] In the embodiment of the present invention, the preset turbidity difference value is 0.2NTU, but the above value is not limited thereto, and those skilled in the art may also adjust the value according to actual needs.

[0042] Specifically, the control module determines whether the biological treatment meets the preset standard according to the water quality evaluation value of the wastewater in the sedimentation tank after sedimentation, wherein: If the water quality evaluation value is less than the first preset water quality evaluation value of 0.35, it is determined that the biological treatment does not meet the preset standard, and the aeration amount in the aerobic tank is increased according to the difference between the preset dissolved oxygen concentration and the dissolved oxygen concentration in the wastewater; If the water quality evaluation value is greater than or equal to the first preset water quality evaluation value and less than the second preset water quality evaluation value of 0.42, it is determined that the biological treatment does not meet the preset standard, and the reason why the biological treatment does not meet the preset standard is determined based on the difference between the water quality evaluation value and the first preset water quality evaluation value; If the water quality evaluation value is greater than or equal to the second preset water quality evaluation value, it is determined that the biological treatment meets the preset standard and filtration treatment is performed.

[0043] In the embodiment of the present invention, the first preset water quality evaluation value is 0.35, and the second preset water quality evaluation value is 0.42, but the above values ​​are not limited thereto, and those skilled in the art may also adjust the values ​​according to actual needs.

[0044] Specifically, the water quality evaluation value is the ratio of biochemical oxygen demand to chemical oxygen demand.

[0045] Specifically, the aeration amount in the aerobic tank is positively correlated with the difference in dissolved oxygen concentration in the sedimentation tank, wherein: If the dissolved oxygen concentration difference is less than the preset dissolved oxygen concentration difference of 0.3 mg / L, the aeration volume in the aerobic tank is adjusted to the corresponding value using the first aeration volume adjustment coefficient of 1.02; If the dissolved oxygen concentration difference is greater than or equal to the preset dissolved oxygen concentration difference, the aeration amount in the aerobic tank is adjusted to a corresponding value using a second aeration amount adjustment coefficient of 1.05.

[0046] The dissolved oxygen concentration difference is the difference between the preset dissolved oxygen concentration and the dissolved oxygen concentration in the wastewater.

[0047] In the embodiment of the present invention, the preset dissolved oxygen concentration is 2.5 mg / L, and the preset dissolved oxygen concentration difference is 0.3 mg / L, but the above values ​​are not limited thereto, and those skilled in the art may also adjust the values ​​according to actual needs.

[0048] Specifically, the control module determines the reason why the biological treatment does not meet the preset standard according to the water quality evaluation difference, wherein: If the water quality evaluation difference is less than the preset water quality evaluation difference of 0.03, it is determined that the reason why the biological treatment does not meet the preset standard is that the pH value in the aerobic tank deviates from the preset range [7,8], and the pH value is adjusted to the preset range by chemical adjustment method to inhibit the activity of aerobic microorganisms; If the water quality evaluation difference is greater than or equal to the preset water quality evaluation difference, it is determined that the reason why the biological treatment does not meet the preset standard is that the number of aerobic microorganisms in the aerobic tank does not meet the standard, and the sludge return ratio is adjusted according to the activated sludge concentration in the aerobic tank.

[0049] In the embodiment of the present invention, the preset water quality evaluation difference is 0.03, and the preset interval is [7,8], but the above values ​​are not limited thereto, and those skilled in the art may also adjust the values ​​according to actual needs.

[0050] Specifically, the chemical adjustment method, for example, adding sodium peroxide or lime water to the wastewater, is not specifically limited, and only needs to adjust the pH value of the wastewater to a preset range.

[0051] Specifically, the activated sludge concentration is measured by spectrophotometry.

[0052] Specifically, the process of adjusting the sludge return ratio according to the activated sludge concentration in the aerobic tank includes: comparing the actual activated sludge concentration with the first preset activated sludge concentration and the second preset activated sludge concentration respectively; Based on the comparison result that the actual activated sludge concentration is less than the first preset activated sludge concentration of 3000 mg / L, the sludge return ratio is adjusted to a corresponding value using a first ratio adjustment coefficient of 1.01; Based on the comparison result that the actual activated sludge concentration is greater than or equal to the first preset activated sludge concentration and less than the second preset activated sludge concentration of 3500 mg / L, the sludge return ratio is adjusted to a corresponding value using the second proportion adjustment coefficient 1.04.

[0053] Specifically, the embodiments of the present invention can increase the concentration of activated sludge in the aerobic tank by adjusting the sludge return ratio, thereby increasing the activity of aerobic microorganisms.

[0054] Specifically, the sludge return ratio is controlled by adjusting the flow rate of the return pump.

[0055] In the embodiment of the present invention, the first preset activated sludge concentration is 3000 mg / L, and the second preset activated sludge concentration is 3500 mg / L, but the above values ​​are not limited thereto, and those skilled in the art may also adjust the values ​​according to actual needs.

[0056] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A slaughterhouse wastewater filtration and treatment system, characterized in that: include: Pre-treatment module, including screens to filter solid pollutants and flotation tanks to remove grease and suspended solids; A biological treatment module, which is connected to the pretreatment module, and includes a hydrolysis acidification tank for decomposing organic matter into small molecular organic matter and an aerobic tank for decomposing and removing small molecular organic matter, wherein the aerobic tank is connected to the hydrolysis acidification tank; A filtration treatment module, which is connected to the biological treatment module, and includes a sedimentation tank for sedimenting the biologically treated wastewater and a filter tank connected to the sedimentation tank for filtering the precipitated wastewater; A detection module, which is connected to the pretreatment module, the biological treatment module and the filtration treatment module respectively, and includes an image acquisition unit arranged inside the flotation tank, and water quality detection units respectively arranged inside the aerobic tank and the sedimentation tank; A control module, which is respectively connected to the pretreatment module, the biological treatment module, the filtration treatment module and the detection module, and is used to determine whether the flotation treatment meets the preset standard according to the floating characteristic value of the flocculants in the flotation tank, to secondarily determine whether the flotation treatment meets the preset standard according to the turbidity of the wastewater inside the flotation tank, to determine whether the biological treatment meets the preset standard according to the water quality evaluation value of the wastewater in the sedimentation tank after sedimentation, and to determine the reason why the biological treatment does not meet the preset standard according to the water quality evaluation difference.

2. The slaughterhouse wastewater filtration treatment system according to claim 1, characterized in that: The control module determines whether the flotation treatment meets the preset standard according to the floating characteristic value of the flocculants in the flotation tank, wherein: If the buoyancy characteristic value is less than a first preset buoyancy characteristic value, it is determined that the flotation treatment does not meet the preset standard, and the diameter of the aeration bubbles in the flotation tank is adjusted according to the difference between the preset buoyancy characteristic value and the buoyancy characteristic value; If the floating characteristic value is greater than or equal to the first preset floating characteristic value and less than the second preset floating characteristic value, it is determined that the flotation treatment does not meet the preset standard, and the flotation treatment is secondarily determined to meet the preset standard according to the turbidity of the wastewater in the flotation tank; If the floating characteristic value is greater than or equal to the second preset floating characteristic value, it is determined that the flotation treatment meets the preset standard and biological treatment is performed.

3. The slaughterhouse wastewater filtration treatment system according to claim 2, characterized in that: The floating characteristic value is determined by the rising rate and floating ratio of the flocculants within a preset time period.

4. The slaughterhouse wastewater filtration treatment system according to claim 3, characterized in that: The control module is provided with different adjustment modes for the diameter of the bubbles in the flotation tank, and each adjustment mode has a different adjustment range for the diameter of the bubbles.

5. The slaughterhouse wastewater filtration treatment system according to claim 4, characterized in that: The control module determines whether the flotation treatment meets the preset standard based on the turbidity of the wastewater in the flotation tank. If the turbidity is less than the preset turbidity, the flotation treatment is determined to meet the preset standard. Under the condition that the turbidity is greater than or equal to the preset turbidity, it is determined that the flotation treatment does not meet the preset standard, and the dosage of the flocculant is increased according to the difference between the turbidity and the preset turbidity.

6. The slaughterhouse wastewater filtration treatment system according to claim 5, characterized in that: The dosage of the flocculant is positively correlated with the turbidity difference, wherein the turbidity difference is the difference between the turbidity and the preset turbidity.

7. The slaughterhouse wastewater filtration treatment system according to claim 6, characterized in that: The control module determines whether the biological treatment meets the preset standard according to the water quality evaluation value of the wastewater in the sedimentation tank after sedimentation, wherein: If the water quality evaluation value is less than a first preset water quality evaluation value, it is determined that the biological treatment does not meet the preset standard, and the aeration amount in the aerobic tank is increased according to the difference between the preset dissolved oxygen concentration and the dissolved oxygen concentration in the wastewater; If the water quality evaluation value is greater than or equal to the first preset water quality evaluation value and less than the second preset water quality evaluation value, it is determined that the biological treatment does not meet the preset standard, and the reason why the biological treatment does not meet the preset standard is determined according to the difference between the water quality evaluation value and the first preset water quality evaluation value; If the water quality evaluation value is greater than or equal to the second preset water quality evaluation value, it is determined that the biological treatment meets the preset standard and filtration treatment is performed.

8. The slaughterhouse wastewater filtration treatment system according to claim 7, characterized in that: The water quality evaluation value is determined by chemical oxygen demand and biochemical oxygen demand.

9. The slaughterhouse wastewater filtration treatment system according to claim 8, characterized in that: The aeration rate in the aerobic tank is positively correlated with the dissolved oxygen concentration difference in the sedimentation tank, wherein the dissolved oxygen concentration difference is the difference between a preset dissolved oxygen concentration and the dissolved oxygen concentration in the wastewater.

10. The slaughterhouse wastewater filtration treatment system according to claim 9, characterized in that: The control module determines the reason why the biological treatment does not meet the preset standard according to the water quality evaluation difference, wherein: If the water quality evaluation difference is less than the preset water quality evaluation difference, it is determined that the reason why the biological treatment does not meet the preset standard is that the pH value in the aerobic tank deviates from the preset range, and the pH value is adjusted to the preset range by chemical adjustment method; If the water quality evaluation difference is greater than or equal to the preset water quality evaluation difference, it is determined that the reason why the biological treatment does not meet the preset standard is that the number of aerobic microorganisms in the aerobic tank does not meet the standard, and the sludge return ratio is adjusted according to the activated sludge concentration in the aerobic tank.

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