A slaughterhouse wastewater filtration and treatment system

Abstract

The invention relates to the technical field of slaughterhouse wastewater treatment, in particular to a slaughterhouse wastewater filtering and treatment system, comprising: a pretreatment module, comprising a grid for filtering solid pollutants and an air flotation tank for removing grease and suspended matter; a biological treatment module, which is connected to the pretreatment module and comprises a hydrolysis acidification tank for decomposing organic matter into small molecular organic matter and an aerobic tank for decomposing and removing the small molecular organic matter; a filtering treatment module, which is connected to the biological treatment module and comprises a sedimentation tank for precipitating biologically treated wastewater and a filtering tank connected to the sedimentation tank for filtering the precipitated wastewater; a detection module, comprising an image acquisition unit arranged inside the air flotation tank, and a water quality detection unit arranged inside the aerobic tank and the sedimentation tank; and a control module, which is respectively connected to the pretreatment module, the biological treatment module, the filtering treatment module and the detection module, thereby improving the treatment efficiency of the slaughterhouse wastewater.

Description

Technical Field

[0001] The present invention relates to the technical field of slaughterhouse wastewater treatment, and particularly to a filtration treatment system for slaughterhouse wastewater. Background Art

[0002] With the improvement of living standards and the increase in meat consumption demand, the scale of the slaughter industry has expanded rapidly, and the wastewater discharge has also increased sharply. These wastewaters have complex compositions, including animal blood stains, grease, feces, visceral debris, and inorganic salts, and are characterized by high chemical oxygen demand, high suspended solids, high ammonia nitrogen, and high grease, posing a serious threat to the environment and ecosystem.

[0003] Chinese Patent Application Publication No.: CN107789897A, discloses a wastewater treatment system for a live pig slaughterhouse, which includes a drainage treatment device body, a leading-in port, a second screen, and a leading-out pipe. The bottom end of the leading-in port is connected to a screening pipeline through a first drainage pipe. An air cylinder is arranged at the top end inside the drainage treatment device body. One end of the screening pipeline is connected to a sedimentation tank through a second drainage pipe. A driving rod is arranged on the left side of the first connecting rod. A first fixing rod and a second fixing rod are inserted inside the fixing piece. The upper surface of the second screen is connected to a second connecting rod through a connecting rope. Both ends of the telescopic baffle are fixed on the first support plate and the second support plate respectively. The leading-out pipe is inserted inside the right wall of the sedimentation tank. In this kind of wastewater and debris screening and drainage treatment device for slaughtering, a solid-liquid impurity separation device is arranged inside the drainage treatment device body, and the waste, hair, or wastewater generated during slaughtering is screened. It can be seen that the above technical solution only separates solid and liquid in the slaughterhouse wastewater, and does not further treat the liquid, resulting in pollutants such as suspended solids, ammonia nitrogen, and grease still existing in the wastewater. Summary of the Invention

[0004] Therefore, the present invention provides a filtration treatment system for slaughterhouse wastewater to overcome the problems of unqualified wastewater treatment and low efficiency caused by the lack of detection in the process of slaughterhouse wastewater treatment in the prior art.

[0005] To achieve the above object, the present invention provides a filtration treatment system for slaughterhouse wastewater, including:

[0006] A pretreatment module, including a grille for filtering solid pollutants and an air flotation tank for removing grease and suspended solids;

[0007] A biological treatment module, which is connected to the pretreatment module, includes a hydrolysis acidification tank for decomposing organic matter into small-molecule organic matter and an aerobic tank for decomposing and removing small-molecule organic matter. Among them, the aerobic tank is connected to the hydrolysis acidification tank;

[0008] The filtration processing module, which is connected to the biological processing module, includes a sedimentation tank for sedimenting the wastewater after biological treatment and a filtration tank connected to the sedimentation tank for filtering the sedimented wastewater;

[0009] The detection module, which is respectively connected to the pretreatment module, the biological processing module and the filtration processing module, 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;

[0010] The control module, which is respectively connected to the pretreatment module, the biological processing module, the filtration processing module and the detection module, 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, secondarily determine whether the flotation treatment meets the preset standard according to the turbidity of the wastewater inside the flotation tank, 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 determine the reason why the biological treatment does not meet the preset standard according to the water quality evaluation difference.

[0011] Further, 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,

[0012] If the floating characteristic value is less than the first preset floating 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 floating characteristic value and the floating characteristic value;

[0013] 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 whether the flotation treatment meets the preset standard is secondarily determined according to the turbidity of the wastewater inside the flotation tank;

[0014] 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 carried out.

[0015] Further, the floating characteristic value is jointly determined by the rising rate and the floating proportion of the flocculants within a preset time period.

[0016] Further, the control module has different adjustment methods for the bubble diameter in the flotation tank, and the adjustment range of each adjustment method for the bubble diameter is different.

[0017] Further, the control module secondarily determines whether the air flotation treatment meets the preset standard according to the turbidity of the wastewater inside the air flotation tank. Under the condition that the turbidity is less than the preset turbidity, it is determined that the air flotation treatment meets the preset standard; under the condition that the turbidity is greater than or equal to the preset turbidity, it is determined that the air 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.

[0018] Further, the dosage of the flocculant is positively correlated with the turbidity difference, where the turbidity difference is the difference between the turbidity and the preset turbidity.

[0019] Further, 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, where

[0020] if the water quality evaluation value is less than the first preset water quality evaluation value, it is determined that the biological treatment does not meet the preset standard, and the aeration volume in the aerobic tank is increased according to the difference between the preset dissolved oxygen concentration and the dissolved oxygen concentration in the wastewater;

[0021] 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;

[0022] 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 carried out.

[0023] Further, the water quality evaluation value is jointly determined by the chemical oxygen demand and the biochemical oxygen demand.

[0024] Further, the aeration volume in the aerobic tank is positively correlated with the difference in the dissolved oxygen concentration in the sedimentation tank, where the difference in the dissolved oxygen concentration is the difference between the preset dissolved oxygen concentration and the dissolved oxygen concentration in the wastewater.

[0025] Further, the control module determines the reason why the biological treatment does not meet the preset standard according to the water quality evaluation difference, where

[0026] 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;

[0027] If the water quality evaluation difference is greater than or equal to the preset water quality evaluation difference, it is determined that the reason for the biological treatment not meeting 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.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows. The present invention includes a pretreatment module, a biological treatment module, a filtration treatment module, a detection module, and a control module. Through the multi-stage wastewater treatment of 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 the real-time monitoring and automatic adjustment of the wastewater treatment process, effectively solving the problems of unqualified wastewater treatment and low efficiency caused by the lack of detection in the prior art during the slaughterhouse wastewater treatment process.

[0029] Furthermore, by setting an image acquisition unit inside the air flotation tank and water quality detection units inside the aerobic tank and the sedimentation tank, the present invention can monitor key parameters during the wastewater treatment process in real time, including the floating characteristic value of flocs in the air flotation tank, the turbidity of the wastewater after air flotation treatment, and the water quality evaluation value of the wastewater in the sedimentation tank after sedimentation treatment. The control module automatically adjusts the treatment parameters according to the monitoring data to ensure that each treatment link meets the preset standard, thereby improving the efficiency and compliance rate of wastewater treatment.

[0030] Furthermore, the control module determines whether the air flotation treatment meets the preset standard according to the floating characteristic value of the flocs. Under the condition that it does not meet the preset standard, the bubble diameter in the air flotation tank is adjusted according to the difference between the preset floating characteristic value and the floating characteristic value, or, whether the air flotation treatment meets the preset standard is re-determined according to the turbidity of the wastewater inside the air flotation tank. A multi-stage determination mechanism is adopted to ensure the effect of the air flotation treatment.

[0031] Furthermore, the present invention determines whether the biological treatment meets the preset standard according to the water quality evaluation value of the wastewater in the sedimentation tank. Under the condition that it does not meet the preset standard, the aeration volume in the aerobic tank is increased according to the difference between the preset dissolved oxygen concentration and the dissolved oxygen concentration in the wastewater, or, the reason for the biological treatment not meeting the preset standard is determined according to the difference between the water quality evaluation value and the first preset water quality evaluation value. The aeration volume 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.

[0032] Furthermore, by automatically adjusting parameters such as the bubble diameter, the dosage of the flocculant, and the aeration volume, the system of the present invention can optimize resource utilization, reduce the waste of chemicals and energy, and lower the operating cost. At the same time, the efficient operation of the system shortens the wastewater treatment time and improves the overall treatment efficiency. Description of the Drawings

[0033] Figure 1 Schematic diagram of module connection of the slaughterhouse wastewater filtration treatment system according to an embodiment of the present invention;

[0034] Figure 2 Flow chart for determining whether the air flotation treatment meets the preset standard according to the floating characteristic value in an embodiment of the present invention;

[0035] Figure 3 Flow chart for determining whether the biological treatment meets the preset standard according to the water quality evaluation value in an embodiment of the present invention;

[0036] Figure 4 Flow chart for determining the reason why the biological treatment does not meet the preset standard according to the water quality evaluation difference in an embodiment of the present invention. Detailed implementation manners

[0037] In order to make the objectives and advantages of the present invention more clear and understandable, the present invention will be 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.

[0038] The preferred implementation manners of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these implementation manners are only used to explain the technical principles of the present invention and do not limit the protection scope of the present invention.

[0039] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only 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, and therefore should not be construed as a limitation of the present invention.

[0040] In addition, it should be noted that in the description of the present invention, 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0041] Please refer to Figures 1 to 4As shown, they are respectively the schematic diagram of module connection of the slaughterhouse wastewater filtration treatment system according to the embodiment of the present invention; the flowchart of judging whether the air flotation treatment meets the preset standard according to the floating characteristic value in the embodiment of the present invention; the flowchart of judging whether the biological treatment meets the preset standard according to the water quality evaluation value in the embodiment of the present invention; the flowchart of determining the reason why the biological treatment does not meet the preset standard according to the water quality evaluation difference in the embodiment of the present invention.

[0042] The slaughterhouse wastewater filtration treatment system according to the embodiment of the present invention includes:

[0043] A pretreatment module, including a grille for filtering solid pollutants and an air flotation tank for removing grease and suspended solids;

[0044] A biological treatment module, which is connected to the pretreatment module, includes a hydrolysis acidification tank for decomposing organic matter into small-molecule organic matter and an aerobic tank for decomposing and removing small-molecule organic matter, wherein the aerobic tank is connected to the hydrolysis acidification tank;

[0045] A filtration treatment module, which is connected to the biological treatment module, includes a sedimentation tank for sedimenting the wastewater after biological treatment and a filtration tank connected to the sedimentation tank for filtering the sedimented wastewater;

[0046] A detection module, which is respectively connected to the pretreatment module, the biological treatment module and the filtration treatment module, includes an image acquisition unit arranged inside the air flotation tank, and water quality detection units respectively arranged inside the aerobic tank and the sedimentation tank;

[0047] A control module, which is respectively connected to the pretreatment module, the biological treatment module, the filtration treatment module and the detection module, is used for judging whether the air flotation treatment meets the preset standard according to the floating characteristic value of the flocs in the air flotation tank, secondarily judging whether the air flotation treatment meets the preset standard according to the turbidity of the wastewater inside the air flotation tank, judging 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 determining the reason why the biological treatment does not meet the preset standard according to the water quality evaluation difference.

[0048] Specifically, the image acquisition unit is an intelligent camera for monitoring the rising rate and floating ratio of the flocs in the air flotation tank.

[0049] Specifically, the water quality detection unit includes a turbidimeter, a dissolved oxygen meter, a BOD meter and a COD meter, which are used for measuring the turbidity of the wastewater in the air flotation tank after air flotation, measuring the dissolved oxygen concentration in the aerobic tank, and measuring the biochemical oxygen demand and chemical oxygen demand of the wastewater in the sedimentation tank after sedimentation.

[0050] Specifically, the control module determines whether the air flotation treatment meets the preset standard according to the floating characteristic value of the flocculants in the air flotation tank, where,

[0051] If the floating characteristic value is less than the first preset floating characteristic value of 0.76, it is determined that the air flotation treatment does not meet the preset standard, and the bubble diameter in the air flotation tank is adjusted according to the difference between the preset floating characteristic value and the floating characteristic value;

[0052] 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 of 0.82, it is determined that the air flotation treatment does not meet the preset standard, and whether the air flotation treatment meets the preset standard is re-determined according to the turbidity of the wastewater inside the air flotation tank;

[0053] If the floating characteristic value is greater than or equal to the second preset floating characteristic value, it is determined that the air flotation treatment meets the preset standard, and biological treatment is carried out.

[0054] In the embodiment of the present invention, the value of the first preset floating characteristic value is 0.76, and the value of the second preset floating characteristic value is 0.82. However, the above values are not limited thereto, and those skilled in the art can also adjust the values according to actual needs.

[0055] Specifically, the process in which the floating characteristic value is jointly determined by the rising rate and the floating ratio of the flocculants within a preset time of 10 min includes,

[0056] Taking the square root of the ratio of the rising rate to the rising rate threshold and then multiplying by the first evaluation coefficient to obtain the rising rate evaluation value, where the first evaluation coefficient is 0.52 and the rising rate threshold is 5 mm / s;

[0057] Taking the square root of the ratio of the floating ratio to the floating ratio threshold and then multiplying 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%;

[0058] Adding the rising rate evaluation value and the floating ratio evaluation value and recording it as the floating characteristic value.

[0059] In the embodiment of the present invention, the value of the preset time is 10 min. However, the above value is not limited thereto, and those skilled in the art can also adjust the value according to actual needs.

[0060] Specifically, the control module has different adjustment methods for the bubble diameter in the air flotation tank, and each adjustment method has a different adjustment range for the bubble diameter, where,

[0061] If the difference in floating characteristics is less than the preset difference in floating characteristics of 0.03, use the first size adjustment coefficient of 0.98 to adjust the bubble diameter in the flotation tank to the corresponding value;

[0062] If the difference in floating characteristics is greater than or equal to the preset difference in floating characteristics, use the second size adjustment coefficient of 0.95 to adjust the bubble diameter in the flotation tank to the corresponding value;

[0063] The difference in floating characteristics is the difference between the preset floating characteristic value and the floating characteristic value.

[0064] In the embodiment of the present invention, the preset difference in floating characteristics is taken as 0.03, but the above value is not limited thereto, and those skilled in the art can also adjust this value according to actual needs.

[0065] 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 can also adjust this value according to actual needs.

[0066] Specifically, the size of the bubbles in the flotation tank is realized by adjusting the aperture of the aerator. The aerator is provided with a variable orifice aeration hose or an adjustable aperture aeration head, and specific limitations are not made, as long as the condition of adjusting the bubble size by changing the diameter of the aeration holes is satisfied.

[0067] Specifically, the control module re - judges whether the flotation treatment meets the preset standard according to the turbidity of the wastewater inside the flotation tank. Under the condition that the turbidity is less than the preset turbidity of 1.5 NTU, it is determined that the flotation treatment meets 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.

[0068] Specifically, the flocculant is, for example, polyaluminum chloride, and the initial dosage of the flocculant is, for example, 50 mg / L. Specific limitations are not made and can be adjusted according to the actual situation.

[0069] In the embodiment of the present invention, the preset turbidity is taken as 1.5 NTU, but the above value is not limited thereto, and those skilled in the art can also adjust this value according to actual needs.

[0070] Specifically, the dosage of the flocculant is positively correlated with the turbidity difference, where,

[0071] If the turbidity difference is less than the preset turbidity difference of 0.2 NTU, use the first dosage adjustment coefficient of 1.03 to adjust the dosage of the flocculant to the corresponding value;

[0072] If the turbidity difference is greater than or equal to the preset turbidity difference, the dosing amount of the flocculant is adjusted to the corresponding value using the second dosing amount adjustment coefficient of 1.06;

[0073] The turbidity difference is the difference between the turbidity and the preset turbidity.

[0074] In an embodiment of the present invention, the preset turbidity difference is taken as 0.2 NTU, but the above value is not limited thereto, and those skilled in the art can also adjust this value according to actual needs.

[0075] 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, where

[0076] 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 volume in the aerobic tank is increased according to the difference between the preset dissolved oxygen concentration and the dissolved oxygen concentration in the wastewater;

[0077] 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 for the biological treatment not meeting the preset standard is determined according to the difference between the water quality evaluation value and the first preset water quality evaluation value;

[0078] 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.

[0079] In an embodiment of the present invention, the first preset water quality evaluation value is taken as 0.35, and the second preset water quality evaluation value is taken as 0.42, but the above values are not limited thereto, and those skilled in the art can also adjust these values according to actual needs.

[0080] Specifically, the water quality evaluation value is the ratio of biochemical oxygen demand to chemical oxygen demand.

[0081] Specifically, the aeration volume in the aerobic tank is positively correlated with the difference in dissolved oxygen concentration in the sedimentation tank, where

[0082] If the difference in dissolved oxygen concentration is less than the preset difference in dissolved oxygen concentration 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;

[0083] If the difference in dissolved oxygen concentration is greater than or equal to the preset difference in dissolved oxygen concentration, the aeration volume in the aerobic tank is adjusted to the corresponding value using the second aeration volume adjustment coefficient of 1.05.

[0084] The difference in dissolved oxygen concentration is the difference between the preset dissolved oxygen concentration and the dissolved oxygen concentration in the wastewater.

[0085] In an embodiment of the present invention, the value of the preset dissolved oxygen concentration is 2.5 mg / L, and the value of the difference in the preset dissolved oxygen concentration is 0.3 mg / L. However, the above values are not limited to this, and those skilled in the art can also adjust the values according to actual needs.

[0086] Specifically, the control module determines the reason why the biological treatment does not meet the preset standard according to the water quality evaluation difference, where

[0087] 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 interval [7, 8], and the pH value is adjusted to the preset interval by chemical adjustment method to inhibit the activity of aerobic microorganisms;

[0088] 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 concentration of activated sludge in the aerobic tank.

[0089] In an embodiment of the present invention, the value of the preset water quality evaluation difference is 0.03, and the value of the preset interval is [7, 8]. However, the above values are not limited to this, and those skilled in the art can also adjust the values according to actual needs.

[0090] Specifically, the chemical adjustment method is, for example, adding sodium peroxide or lime water to the wastewater, and the specific method is not limited, as long as it can adjust the pH value of the wastewater to the preset interval.

[0091] Specifically, the concentration of activated sludge is measured by spectrophotometry.

[0092] Specifically, the process of adjusting the sludge return ratio according to the concentration of activated sludge in the aerobic tank includes

[0093] Comparing the actual activated sludge concentration with the first preset activated sludge concentration and the second preset activated sludge concentration respectively;

[0094] Based on the comparison result that the actual activated sludge concentration is less than the first preset activated sludge concentration by 3000 mg / L, the sludge return ratio is adjusted to the corresponding value using the first proportional adjustment coefficient 1.01;

[0095] 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 by 3500 mg / L, the sludge return ratio is adjusted to the corresponding value using the second proportional adjustment coefficient 1.04.

[0096] Specifically, in the embodiments of the present invention, by adjusting the sludge return ratio, the concentration of activated sludge in the aerobic tank can be increased, thereby enhancing the activity of aerobic microorganisms.

[0097] Specifically, the magnitude of the sludge return ratio is controlled by adjusting the flow rate of the return pump.

[0098] In the embodiments of the present invention, the value of the first preset activated sludge concentration is 3000 mg / L, and the value of the second preset activated sludge concentration is 3500 mg / L. However, the above values are not limited thereto, and those skilled in the art can also adjust the values according to actual needs.

[0099] 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.

[0100] The above are only the preferred embodiments of the present invention and are not used to limit the present invention; for those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included within 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; 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; The floating characteristic value is determined by the rising rate and floating ratio of the flocculants within a preset time period; 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 aerobic tank; 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 filtering treatment is performed; The water quality evaluation value is determined by chemical oxygen demand and biochemical oxygen demand.

2. The slaughterhouse wastewater filtration treatment system according to claim 1, 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.

3. 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 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.

4. The slaughterhouse wastewater filtration treatment system according to claim 3, 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.

5. The slaughterhouse wastewater filtration treatment system according to claim 1, characterized in that: 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 aerobic tank.

6. The slaughterhouse wastewater filtration treatment system according to claim 1, 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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