A comprehensive deep treatment device and method for aquaculture wastewater

Abstract

The invention discloses a comprehensive deep treatment device and method for aquaculture wastewater. The comprehensive deep treatment device for aquaculture wastewater comprises a filter tank, a first reaction tank and a second reaction tank which are arranged in sequence. The first reaction tank is connected with the second reaction tank through a first water pump component. A first stirring component is arranged in the first reaction tank. A sludge settling component is arranged at one end of the second reaction tank close to the first reaction tank. A second stirring component is arranged above the sludge settling component. A fiber rotary disc filter is arranged at the other end of the second reaction tank. A second water pump component for pumping wastewater in the sludge settling component into the second reaction tank is arranged on the outer side of the sludge settling component. The invention can realize multi-stage filtration, improve the pretreatment quality of wastewater, can efficiently stir, effectively reduce the concentration of pollutants in wastewater, help to concentrate the sludge, facilitate the collection and treatment of sludge, and ensure that the discharged water reaches a higher water quality standard.

Description

Technical Field

[0001] The present invention relates to the field of equipment, and more specifically to a comprehensive deep treatment device and method for aquaculture wastewater. Background Art

[0002] Aquaculture animals live in water, and their physiological activities such as breathing, feeding, and excretion are closely related to water quality. For example, fish obtain oxygen from water through their gills. When the concentration of pollutants in the water, such as ammonia nitrogen and nitrite, is too high, it will damage the fish gills. Ammonia nitrogen can affect the gas exchange function of the fish gills, causing fish to have breathing difficulties, and in severe cases, it can lead to suffocation and death. High concentrations of organic matter will consume a lot of oxygen when decomposing in water, causing water hypoxia. Aquatic organisms such as shrimps have high requirements for dissolved oxygen. When the dissolved oxygen is lower than a certain level, the growth rate of shrimps will slow down, their immunity will decrease, and they will be susceptible to various diseases. Heavy metal ions (such as mercury, cadmium, lead, etc.) in sewage will be enriched in aquatic organisms. These heavy metals will interfere with the physiological metabolic processes of aquatic organisms, such as affecting the activity of enzymes. Taking shellfish as an example, the accumulation of heavy metals will cause damage to the reproductive system of shellfish and affect their reproductive capacity. The excrement, residual feed and carcasses of aquatic products will be mixed and settled at the bottom of the aquaculture water body, forming a sewage layer in the aquaculture water body over time. If not properly treated, it will affect the water quality and ecological balance of aquaculture, and if untreated aquaculture wastewater is directly discharged into the natural environment, it will damage the water ecosystem.

[0003] As environmental regulations become increasingly stringent, aquaculture farms need to treat wastewater to meet national or local discharge standards. These standards have clear restrictions on indicators such as chemical oxygen demand (COD), biochemical oxygen demand (BOD), suspended solids, and heavy metal content in wastewater.

[0004] In the current treatment of aquaculture wastewater, aquaculture wastewater is mainly treated by physical and chemical treatment technology and biological treatment technology. In the physical and chemical treatment technology, flocculation treatment is an indispensable process. By adding flocculants to aquaculture wastewater, the pollutant particles in the wastewater form larger flocs, and the flocs can be separated by filtering equipment, which can effectively remove the pollutant particles in the wastewater. Among them, the amount of flocculants added has a significant impact on the treatment effect of aquaculture wastewater. If the amount added is too little, the particles in the wastewater cannot be effectively aggregated, resulting in the water after flocculation treatment still containing more pollutants. If too many chemicals are added for wastewater treatment, it will eventually lead to aquatic product poisoning. Therefore, it is necessary to provide an aquaculture wastewater treatment device and method to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a comprehensive deep treatment device and method for aquaculture wastewater to solve the problems raised in the above background technology.

[0006] To achieve the above purpose, the present invention is implemented by the following technical means:

[0007] A comprehensive deep treatment device for aquaculture wastewater comprises a filter tank, a first reaction tank and a second reaction tank which are arranged in sequence, the first reaction tank and the second reaction tank being connected via a first water pumping component, the filter tank is provided with a grid for screening out larger solid impurities in the wastewater, the first reaction tank is provided with a first stirring component, the second reaction tank is provided with a sludge settling component at one end close to the first reaction tank, a second stirring component is provided above the sludge settling component, a fiber rotary disc filter is provided at the other end of the second reaction tank, and a second water pumping component for pumping wastewater in the sludge settling component into the second reaction tank is provided on the outer side of the sludge settling component.

[0008] Furthermore, the filter tank includes a grid and a first vertical plate arranged vertically in sequence, a first opening is opened at the top of the first vertical plate, a first filter screen is arranged at the first opening, a second opening is opened at the bottom of the first vertical plate, and a first baffle for blocking the second opening is arranged at the second opening.

[0009] Furthermore, a first stirring component is provided in the first reaction pool, and the first stirring component includes a first mounting plate installed on the upper surface of the first reaction pool, the top of the first mounting plate is connected to a first inverted U-shaped bracket, the top of the first inverted U-shaped bracket is provided with a first driving reduction motor, the first driving reduction motor is connected to a first stirring shaft passing through the first mounting plate and extending into the first reaction pool, and the lower part of the first stirring shaft is provided with a first stirring blade.

[0010] Furthermore, the first water pumping component includes a first water pump installed at one end inside the second reaction tank, the first water pump is connected to the first reaction tank through a first water inlet pipe, and the first water pump is connected to the sludge sedimentation component through a first water outlet pipe.

[0011] Furthermore, the sludge sedimentation component includes two groups of fixed vertical plates arranged vertically and parallel to each other in the second reaction tank, the bottoms of the two fixed vertical plates are connected to the inner bottom surface of the second reaction tank, the height of the two fixed vertical plates protrudes from the second reaction tank, and the upper parts of the two fixed vertical plates are symmetrically provided with two blocking vertical plates respectively connected to the upper edge of the second reaction tank, and a sludge sedimentation block is arranged between the two fixed vertical plates, and the sludge sedimentation block is provided with a plurality of groups of sludge sedimentation holes evenly distributed and obliquely arranged along the first direction, and the bottoms of each group of the second sludge sedimentation holes are respectively connected to a perforated pipe whose end passes through the second reaction tank, and each of the perforated pipes is located in a section of the sludge sedimentation block and is respectively provided with an outlet hole matching the sludge sedimentation hole.

[0012] Furthermore, a second stirring component is provided in the second reaction tank, and the second stirring component includes a second mounting plate installed on the upper surface of the second reaction tank, the top of the second mounting plate is connected to a second inverted U-shaped bracket, the top of the second inverted U-shaped bracket is provided with a second driving reduction motor, the second driving reduction motor is connected to a second stirring shaft passing through the second mounting plate and extending into the second reaction tank, and the lower part of the second stirring shaft is provided with a second stirring blade.

[0013] A comprehensive deep treatment method for aquaculture wastewater comprises the following steps:

[0014] (1) Preliminary filtration of sewage: sewage first enters the filter tank, where it is screened out by a grille to remove larger solid impurities. After being filtered by the grille, the sewage continues to flow in the filter tank and passes through the first filter screen on the first vertical plate to further filter out smaller particle impurities.

[0015] (2) Treatment in the first reaction tank: The sewage after preliminary filtration is transported to the first reaction tank, the suspended solids content, organic matter content, pH value and temperature of the sewage in the first reaction tank are measured, and a suitable amount of polyaluminium chloride is added to the first reaction tank according to the flocculant addition amount model, and the polyaluminium chloride is quickly mixed with the sewage under the slow rotation of the first stirring component;

[0016] (3) Treatment in the second reaction tank: The sewage treated in the first reaction tank is transported to the sludge settling component of the second reaction tank through the first pumping component. The suspended solids content, organic matter content, pH value and temperature of the sewage in the second reaction tank are measured, and a suitable amount of polyacrylamide is added to the second reaction tank according to the flocculant addition model. Under the action of the fast rotation of the second stirring component, the polyacrylamide and the sewage are quickly mixed to achieve flocculation reaction. The sludge in the sludge settling component enters the perforated pipe through the sludge settling hole under the action of gravity and is led out of the second reaction tank for subsequent treatment. The sewage after flocculation reaction and sludge settling continues to flow in the second reaction tank and is finally finely filtered through the fiber rotary filter to remove residual tiny particles and organic pollutants.

[0017] (4) Wastewater discharge: After comprehensive and deep treatment, the wastewater reaches a certain water quality standard and can be discharged or recycled for aquaculture according to actual needs.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention can achieve multi-stage filtration, improve the pretreatment quality of sewage, and can efficiently stir, making the reaction faster and more thorough, thereby effectively reducing the concentration of pollutants in the sewage, helping to concentrate the sedimentation of sludge, facilitating the collection and treatment of sludge, and ensuring that the discharged water meets higher water quality standards, which can be directly discharged or recycled for aquaculture. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the product structure of an embodiment of the present invention;

[0021] Figure 2 This is a partial structural diagram of a product according to an embodiment of the present invention;

[0022] Figure 3 This is a partial structural diagram of a product according to an embodiment of the present invention;

[0023] Figure 4 This is a partial structural diagram of a product according to an embodiment of the present invention;

[0024] Figure 5 This is a partial structural diagram of a product according to an embodiment of the present invention;

[0025] Figure 6 This is a partial structural diagram of a product according to an embodiment of the present invention;

[0026] Figure 7 It is a schematic top view of a partial structure of a product according to an embodiment of the present invention;

[0027] Figure 8 The structure of the product of the embodiment of the present invention is as follows Figure 7 Schematic diagram of the cross-section structure along the AA line;

[0028] Fig. 9 It is a schematic diagram of the partial structure of the product of the embodiment of the present invention. DETAILED DESCRIPTION

[0029] The following is a detailed description of the embodiments of the technical solution of the present application in conjunction with the accompanying drawings. The following embodiments and drawings are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application. The accompanying drawings only schematically show the parts related to the technical solution of the present application, and they do not represent the actual structure of the product.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0031] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0032] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0033] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0034] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0035] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0036] In the present embodiment, a comprehensive deep treatment equipment for aquaculture wastewater includes a filter tank 100, a first reaction tank 200, and a second reaction tank 300 which are arranged in sequence. The first reaction tank 200 and the second reaction tank 300 are connected through a first pumping component 400. The filter tank 100 is provided with a grid 110 for screening out larger solid impurities in the wastewater. The first reaction tank 200 is provided with a first stirring component 500. The second reaction tank 300 is provided with a sludge sedimentation component 600 at one end close to the first reaction tank 200, and a second stirring component 700 is provided above the sludge sedimentation component 600. A fiber rotary disc filter 800 is provided at the other end of the second reaction tank 300. The outer side of the sludge sedimentation component 600 is provided with a second pumping component 900 for pumping the sewage in the sludge sedimentation component 600 into the second reaction tank 300.

[0037] In one or more possible embodiments of the present invention, the filter tank 100 includes a grid 110 and a first vertical plate 120 which are arranged vertically in sequence. A first opening 121 is provided at the upper part of the first vertical plate 120, a first filter screen plate 122 is provided at the first opening 121, a second opening 123 is provided at the lower part of the first vertical plate 120, and a first baffle 124 for blocking the second opening 123 is provided at the second opening 123. The grid 110 and the first vertical plate 120 are provided in the filter tank 100 to form a multi-stage filtration system. The grid 110 firstly screens out larger solid impurities in the sewage, and can effectively intercept impurities such as feed residues and larger aquatic plant residues, preventing these large particles from entering the subsequent treatment link, avoiding clogging the pipeline or damaging the equipment. A first filter screen plate 122 is provided at the first opening 121 on the first vertical plate 120, which can further filter smaller particles, finely filter the sewage, remove those fine solid impurities that may affect the subsequent reaction, and improve the pretreatment quality of the sewage. The second opening 123 and the first baffle 124 increase the flexibility of the filter tank 100. The opening and closing state of the second opening 123 can be adjusted in time according to the specific conditions of the sewage, such as the level of solid impurities, to control the flow direction and filtering degree of the sewage.

[0038] In one or more possible embodiments of the present invention, a first stirring member 500 is provided in the first reaction tank 200, and the first stirring member 500 includes a first mounting plate 510 installed on the upper surface of the first reaction tank 200, a first inverted U-shaped bracket 520 is connected to the top of the first mounting plate 510, a first driving reduction motor 530 is provided on the top of the first inverted U-shaped bracket 520, and the first driving reduction motor 530 is connected to a first stirring shaft 540 that passes through the first mounting plate 510 and penetrates into the first reaction tank 200, and a first stirring blade 550 is provided at the lower part of the first stirring shaft 540. The design of the first stirring member 500 helps to improve the reaction efficiency. The first mounting plate 510 and the first inverted U-shaped bracket provide a stable support structure for the first driving reduction motor 530, ensuring that the motor is stable and reliable during operation. The first stirring shaft 540 connected to the first driving reduction motor 530 and the first stirring blade 550 at the lower part penetrate into the first reaction tank 200, so that the added chemical agent can be fully mixed with the sewage. Aquaculture wastewater may contain pollutants such as ammonia nitrogen and organic matter. Through sufficient stirring, the reaction between chemical agents and these pollutants can be accelerated. For example, when conducting redox reactions or neutralization reactions, efficient stirring can make the reactions faster and more thorough, thereby effectively reducing the concentration of pollutants in the wastewater.

[0039] In one or more possible embodiments of the present invention, the first pumping component 400 includes a first water pump 410 installed at one end of the second reaction tank 300, the first water pump 410 is connected to the first reaction tank 200 through the first water inlet pipe 420, and the first water pump 410 is connected to the sludge settling component 600 through the first outlet pipe 430. The first pumping component 400 includes a first water pump 410 installed at one end of the second reaction tank 300, and a first water inlet pipe 420 and a first outlet pipe 430 connected, and this layout makes the pumping component compact. The first water pump 410 can stably transport the sewage in the first reaction tank 200 to the sludge settling component 600 of the second reaction tank 300, ensuring the orderly flow of sewage between the treatment units. At the same time, the connection method of the pipeline is convenient for maintenance and inspection, and once problems such as blockage or leakage occur, they can be repaired relatively easily.

[0040] In one or more possible embodiments of the present invention, the sludge sedimentation component 600 includes two groups of fixed vertical plates 610 vertically and parallelly arranged in the second reaction tank 300, the bottoms of the two fixed vertical plates 610 are connected to the inner bottom surface of the second reaction tank 300, the height of the two fixed vertical plates 610 protrudes from the second reaction tank 300, and the upper parts of the two fixed vertical plates 610 are symmetrically provided with two blocking vertical plates 620 respectively connected to the upper edge of the second reaction tank 300, and a sludge sedimentation block 630 is arranged between the two fixed vertical plates 610, and the sludge sedimentation block 630 is provided with a plurality of groups of sludge sedimentation holes 631 evenly distributed and obliquely arranged along the first direction, and the bottoms of each group of the second sludge sedimentation holes 631 are respectively connected to a perforated pipe 640 with one end passing through the second reaction tank 300, and each of the perforated pipes 640 is located in a section of the sludge sedimentation block 630 and is respectively provided with an outlet hole 641 matching the sludge sedimentation hole 631. The combination of two sets of vertical and parallel fixed vertical plates 610 and the blocking vertical plates 620 forms a relatively independent and closed sludge sedimentation space, which is helpful for centralized sedimentation of sludge. Several sets of inclined sludge sedimentation holes 631 are opened on the sludge sedimentation block 630, which use gravity to make the sludge settle naturally. Moreover, the perforated pipe 640 connected to the bottom of the sedimentation hole can timely guide the precipitated sludge to avoid excessive accumulation of sludge in the sedimentation block to affect the sedimentation effect, and it is also convenient for collecting and processing sludge.

[0041] In one or more possible embodiments of the present invention, a second stirring component 700 is arranged in the second reaction tank 300, and the second stirring component 700 includes a second mounting plate 710 installed on the upper surface of the second reaction tank 300, and the top of the second mounting plate 710 is connected to a second inverted U-shaped bracket 720, and the top of the second inverted U-shaped bracket 720 is provided with a second driving reduction motor 730, and the second driving reduction motor 730 is connected to a second stirring shaft 740 that passes through the second mounting plate 710 and penetrates into the second reaction tank 300, and the lower part of the second stirring shaft 740 is provided with a second stirring blade 750.

[0042] In the present invention, the fiber disc filter 800 is located at the other end of the second reaction tank 300. As the last filtering process, it can finely filter the sewage after multiple previous treatment steps. It can effectively remove tiny particles, remaining organic matter and some microorganisms in the sewage, ensuring that the discharged water meets high water quality standards and can be directly discharged or recycled for aquaculture.

[0043] A comprehensive deep treatment method for aquaculture wastewater comprises the following steps:

[0044] (1) Preliminary filtration of sewage: The sewage first enters the filter tank 100, where it is filtered through the grille 110 to remove larger solid impurities. After being filtered through the grille 110, the sewage continues to flow in the filter tank 100, and passes through the first filter screen 122 on the first vertical plate 120 to further filter smaller particle impurities.

[0045] (2) Treatment in the first reaction tank 200: The sewage after preliminary filtration is transported to the first reaction tank 200, the suspended matter content, organic matter content, pH value and temperature of the sewage in the first reaction tank 200 are measured, and a suitable amount of polyaluminium chloride is added to the first reaction tank 200 according to the flocculant addition amount model, and the polyaluminium chloride is quickly mixed with the sewage under the slow rotation of the first stirring member 500;

[0046] (3) Treatment in the second reaction tank 300: The sewage treated in the first reaction tank 200 is transported to the sludge settling component 600 of the second reaction tank 300 through the first pumping component 400. The suspended solids content, organic matter content, pH value and temperature of the sewage in the second reaction tank 300 are measured, and a suitable amount of polyacrylamide is added to the second reaction tank 300 according to the flocculant addition model. Under the action of the fast rotation of the second stirring component 700, the polyacrylamide and the sewage are quickly mixed to achieve flocculation reaction. The sludge in the sludge settling component 600 enters the perforated pipe 640 through the sludge settling hole 631 under the action of gravity and is led out of the second reaction tank 300 for subsequent treatment. After the flocculation reaction and sludge settling, the sewage continues to flow in the second reaction tank 300 and is finally finely filtered through the fiber rotary filter 800 to remove residual tiny particles and organic pollutants.

[0047] (4) Wastewater discharge: After comprehensive and deep treatment, the wastewater reaches a certain water quality standard and can be discharged or recycled for aquaculture according to actual needs.

[0048] The flocculant addition amount model described above in the present invention uses the suspended matter content, organic matter content, pH value and temperature of sewage as relevant characteristic data, and then trains the model based on the multi-layer perceptron model by cleaning the data. The pre-processed data is divided into a training set, a validation set and a test set, usually in a ratio of 70%:15%:15%, to obtain a prediction value expression, and is selected through training evaluation until suitable performance is obtained. The trained and evaluated model is applied to actual aquaculture sewage treatment, and the characteristic data of the sewage is collected in real time and input into the model to obtain a predicted value of the flocculant dosage.

[0049] In combination with the above content, the specific examples are as follows:

[0050] Collect aquaculture wastewater samples and measure relevant characteristics of the wastewater, including:

[0051] x1: suspended solids concentration of sewage (mg / L), measured by gravimetric method or turbidity meter;

[0052] x2: Chemical oxygen demand (COD, mg / L) of sewage, determined by standard chemical analysis methods;

[0053] x3: pH value of sewage, measured using a pH meter;

[0054] x4: sewage temperature (℃), measured with a thermometer;

[0055] y: The corresponding optimal flocculant dosage (mg / L), which is determined through multiple experiments and observation of flocculation effect.

[0056] Clean the collected data and remove outliers, such as data points that are outside the normal measurement range;

[0057] Normalize the data so that each feature data is in the same magnitude range. i , using the minimum-maximum normalization method:

[0058] where xi, min and x i,max They are the features x i The minimum and maximum values ​​of

[0059] For the multi-layer perceptron model, assuming the input vector x = (x1, x2, x3, x4), the neuron output h1 in the first hidden layer j , j = 1, 2, 3, 4…m1, m1 is the number of neurons in the first hidden layer, then:

[0060] in, is the connection weight from the input layer to the first hidden layer, is the bias term of the first hidden layer, σ is the activation function;

[0061] The neuron output of the subsequent hidden layer (assuming there is a second hidden layer with m2 neurons) is Where k = 1, 2, 3, 4…m2, then

[0062] in is the connection weight from the first hidden layer to the second hidden layer, is the bias term of the second hidden layer;

[0063] Then the predicted value of the final output layer is for:

[0064] Where: m L is the number of neurons in the last hidden layer, is the connection weight from the last hidden layer to the output layer, b L is the bias term of the output layer, y l is the output of the neurons in the last hidden layer.

[0065] During the training process, adjust the values ​​of weights and biases according to the gradient of the loss function with respect to them; use the validation set to evaluate the model performance; adjust the model hyperparameters (such as the number of hidden layers, the number of neurons, the learning rate, etc.) based on the evaluation results, and retrain the model until satisfactory performance is achieved.

[0066] The specific embodiments disclosed in the present invention fall within the protection scope of the claims of the present invention, and are the specific lower-level implementation scope of the characteristic part of the present invention. The protection content of the specific embodiments is merely an explanation of the protection scope of the claims of the present invention. The protection scope of the present invention is not limited to the protection content of the specific embodiments, and the protection content of the specific embodiments should not be understood as a limitation on the protection scope of the claims of the present invention.

[0067] The product structure connection relationships that fall within the protection scope of the present invention shall fall within the protection content of the present invention; without departing from the protection essence of the present invention, conventional technical improvements are made to the structure of product components, such as improvements to the partial structure of the product in the specific embodiments of the present invention, which will also fall within the protection essence of the present invention.

[0068] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that the described embodiments may be modified in various ways by a person skilled in the art without departing from the scope of the present invention. Therefore, the above description is illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

[0069] The use of "a" and "an / kind" to describe elements of the present invention is only for convenience and to give a general description of the present invention. Unless otherwise clearly stated, the description should be understood to include one / kind or at least one / kind.

Claims

1. A comprehensive deep treatment equipment for aquaculture wastewater, characterized by: The invention comprises a filter tank (100), a first reaction tank (200), and a second reaction tank (300) which are arranged in sequence. The first reaction tank (200) and the second reaction tank (300) are connected via a first pumping component (400). A grid (110) for screening out larger solid impurities in sewage is provided in the filter tank (100). A first stirring component (500) is provided in the first reaction tank (200). A sludge settling component (600) is provided at one end of the second reaction tank (300) close to the first reaction tank (200). A second stirring component (700) is provided above the sludge settling component (600). A fiber rotary disc filter (800) is provided at the other end of the second reaction tank (300). A second pumping component (900) for pumping sewage in the sludge settling component (600) into the second reaction tank (300) is provided on the outer side of the sludge settling component (600).

2. The aquaculture wastewater comprehensive deep treatment equipment according to claim 1 is characterized by: The filter tank (100) comprises a grid (110) and a first vertical plate (120) which are arranged vertically in sequence; a first opening (121) is provided at the top of the first vertical plate (120); a first filter screen (122) is provided at the first opening (121); a second opening (123) is provided at the bottom of the first vertical plate (120); a first baffle (124) for blocking the second opening (123) is provided at the second opening (123).

3. The comprehensive deep treatment equipment for aquaculture wastewater according to claim 1 is characterized by: The first stirring component (500) includes a first mounting plate (510) installed on the upper surface of the first reaction tank (200), the top of the first mounting plate (510) is connected to a first inverted U-shaped bracket (520), the top of the first inverted U-shaped bracket (520) is provided with a first driving reduction motor (530), the first driving reduction motor (530) is connected to a first stirring shaft (540) that passes through the first mounting plate (510) and penetrates into the first reaction tank (200), and the lower part of the first stirring shaft (540) is provided with a first stirring blade (550).

4. The comprehensive deep treatment equipment for aquaculture wastewater according to claim 1 is characterized by: The first water pump component (400) includes a first water pump (410) installed at one end inside the second reaction tank (300), the first water pump (410) is connected to the first reaction tank (200) through a first water inlet pipe (420), and the first water pump (410) is connected to the sludge sedimentation component (600) through a first water outlet pipe (430).

5. The comprehensive deep treatment equipment for aquaculture wastewater according to claim 1 is characterized by: The sludge settling component (600) comprises two sets of fixed vertical plates (610) vertically and parallelly arranged in the second reaction tank (300), the bottoms of the two fixed vertical plates (610) are connected to the inner bottom surface of the second reaction tank (300), the height of the two fixed vertical plates (610) protrudes from the second reaction tank (300), and the upper parts of the two fixed vertical plates (610) are symmetrically provided with two blocking vertical plates (620) respectively connected to the upper edges of the second reaction tank (300), and the two fixed vertical plates (610) are connected to the inner bottom surface of the second reaction tank (300). A sludge sedimentation block (630) is arranged between the plates (610), and the sludge sedimentation block (630) is provided with a plurality of groups of sludge sedimentation holes (631) uniformly distributed and obliquely arranged along a first direction, and the bottom of each group of the second sludge sedimentation holes (631) is respectively connected to a perforated pipe (640) having one end passing through the second reaction tank (300), and each of the perforated pipes (640) is located at a section of the sludge sedimentation block (630) and is respectively provided with an outlet hole (641) that matches the sludge sedimentation hole (631).

6. The comprehensive deep treatment equipment for aquaculture wastewater according to claim 1 is characterized by: A second stirring component (700) is arranged in the second reaction tank (300), and the second stirring component (700) includes a second mounting plate (710) installed on the upper surface of the second reaction tank (300), and the top of the second mounting plate (710) is connected to a second inverted U-shaped bracket (720), and the top of the second inverted U-shaped bracket (720) is arranged with a second driving reduction motor (730), and the second driving reduction motor (730) is connected to a second stirring shaft (740) that passes through the second mounting plate (710) and penetrates into the second reaction tank (300), and the lower part of the second stirring shaft (740) is provided with a second stirring blade (750).

7. A comprehensive deep treatment method for aquaculture wastewater, characterized by: The steps include: (1) Preliminary filtration of sewage: The sewage first enters the filter tank (100), and is filtered through the grille (110) to remove larger solid impurities. The sewage filtered through the grille (110) continues to flow in the filter tank (100), and is further filtered through the first filter screen (122) on the first vertical plate (120) to filter smaller particle impurities. (2) Treatment in the first reaction tank (200); the sewage after preliminary filtration is transported to the first reaction tank (200), the suspended matter content, organic matter content, pH value and temperature of the sewage in the first reaction tank (200) are measured, and a suitable amount of polyaluminium chloride is added to the first reaction tank (200) according to the flocculant addition amount model, and the polyaluminium chloride is quickly mixed with the sewage under the action of the slow rotation of the first stirring component (500); (3) Treatment in the second reaction tank (300); the sewage treated in the first reaction tank (200) is transported to the sludge settling component (600) of the second reaction tank (300) through the first pumping component (400); the suspended matter content, organic matter content, pH value and temperature of the sewage in the second reaction tank (300) are measured; and a suitable amount of polyacrylamide is added to the second reaction tank (300) according to the flocculant addition amount model; under the action of the fast rotation of the second stirring component (700), the polyacrylamide and the sewage are quickly mixed to achieve a flocculation reaction; the sludge in the sludge settling component (600) enters the perforated pipe (640) through the sludge settling hole (631) under the action of gravity, and is led out of the second reaction tank (300) for subsequent treatment; the sewage after the flocculation reaction and sludge settling continues to flow in the second reaction tank (300) and is finally finely filtered through the fiber rotary disc filter (800) to remove residual tiny particles and organic pollutants; (4) Wastewater discharge: After comprehensive and deep treatment, the wastewater reaches a certain water quality standard and can be discharged or recycled for aquaculture according to actual needs.

8. A comprehensive deep treatment method for aquaculture wastewater according to claim 7, characterized in that: The flocculant addition amount model uses the suspended matter content, organic matter content, pH value and temperature of sewage as relevant characteristic data, and then cleans the data and trains the model based on the multi-layer perceptron model. The pre-processed data is divided into a training set, a validation set and a test set, usually in a ratio of 70%:15%:15%, to obtain a prediction value expression, and is selected through training evaluation until suitable performance is obtained. The trained and evaluated model is applied to actual aquaculture sewage treatment, and the characteristic data of the sewage is collected in real time and input into the model to obtain the prediction value of the flocculant addition amount.

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