A device and method for treating high-concentration liquor brewing wastewater

Abstract

The present invention relates to the technical field of wastewater treatment, and in particular to a device and method for treating high-concentration liquor brewing wastewater. The device comprises a first-stage EGSB reactor, a second-stage EGSB reactor, and a bacteria-algae symbiotic reactor. The first-stage EGSB reactor and the second-stage EGSB reactor have the same structure. A water bath insulation layer is provided inside the EGSB reactor, a light shielding plate is provided outside the water bath insulation layer, and an expansion reaction zone is provided below the EGSB reactor. A plurality of sludge particles are provided in the expansion reaction zone, and the sludge particles are in an expanded and fluidized state after absorbing water. A sludge discharge port is also provided at the bottom of the EGSB reactor. High-concentration brewing wastewater passes through the three reactors in sequence, thereby strengthening wastewater treatment and improving treatment efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, in particular to a device and method for treating high-concentration liquor brewing wastewater. Background Art

[0002] Currently, liquor brewing wastewater is classified as light industrial wastewater, characterized by high COD (organic pollutants), low pH, high ammonia nitrogen, and high phosphorus concentrations. During liquor industry wastewater treatment, flocculants are typically used to reduce turbidity, color, chemical oxygen demand (COD), biological oxygen demand (BOD), and nitrogen and phosphorus levels, or to improve sludge settling performance. While traditional flocculants can achieve the required wastewater degradation, they suffer from poor flocculation effectiveness, high dosage requirements, and potential safety risks. The sludge produced by the treatment of high-concentration liquor brewing wastewater is semi-solid, has a high moisture content, and poor dehydration properties. Residual nutrients such as nitrogen and phosphorus, as well as small amounts of harmful substances, can pollute the environment if not properly handled.

[0003] The EGSB reactor (expanded granular sludge reactor) is a high-efficiency reactor that directly inoculates anaerobic granular sludge. It adopts a larger height-to-diameter ratio, increases effluent reflow, and improves the upward flow rate, so that the granular sludge is in an expanded and fluidized state, fully in contact with the influent, and has a better mass transfer effect. It can treat medium and high concentration organic wastewater.

[0004] In a bacteria-algae symbiotic system, algae photosynthesize under light conditions to sustain their growth and produce oxygen. Simultaneously, aerobic bacteria use the oxygen produced to degrade organic matter, and the carbon dioxide produced by this degradation provides a carbon source for algae growth. Wastewater is purified through bacterial respiration and algae photosynthesis, effectively reducing the energy consumption of mechanical aeration. Furthermore, nitrogen and phosphorus nutrients in the wastewater, as well as small organic molecules metabolized by bacteria, can be utilized by the algae, further improving wastewater treatment efficiency. To date, bacteria-algae complete mixing systems have suffered from the serious loss of bacteria and microalgae with the effluent. Immobilized bacteria-algae wastewater treatment systems have high requirements for immobilization carriers and high immobilization costs, which hinders the practical application of bacteria-algae synergistic wastewater treatment. Therefore, the present invention proposes a device for synergistic wastewater treatment using two-stage EGSB reactors in series and a bacteria-algae symbiotic reactor. This device utilizes the high COD removal capacity of the EGSB reactor and the characteristics of the bacteria-algae biofilm to efficiently and synergistically treat wastewater and reduce aeration time.

[0005] The present invention overcomes the deficiencies of the prior art and provides a device and method for treating high-concentration liquor brewing wastewater.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is:

[0007] The first aspect of the present invention discloses a high-concentration liquor brewing wastewater treatment device, comprising a primary EGSB reactor, a secondary EGSB reactor and a bacteria-algae symbiotic reactor;

[0008] The first-stage EGSB reactor has the same structure as the second-stage EGSB reactor. A water bath insulation layer is provided inside the EGSB reactor, and a light shield is provided outside the water bath insulation layer. An expansion reaction zone is provided below the EGSB reactor. A plurality of sludge particles are provided in the expansion reaction zone. After absorbing water, the sludge particles are in an expanded and fluidized state. A sludge discharge port is also provided at the bottom of the EGSB reactor.

[0009] A settling zone is provided above the EGSB reactor. A reflux seam and an air seal are provided at the junction of the settling zone and the expansion reaction zone. The settling zone, the reflux seam and the air seal form a three-phase separator, which separates biogas, sludge and liquid. The three-phase separator is connected to the gas collecting chamber through an exhaust pipe.

[0010] A plurality of biofilm reaction zones are arranged in sequence along the axial direction in the bacteria-algae symbiotic reactor, and an annular light source is arranged outside the biofilm reaction zones.

[0011] Furthermore, in a preferred embodiment of the present invention, a first water inlet is provided at the bottom of the first-level EGSB reactor, a first water inlet pipe is connected to the first water inlet, a water inlet peristaltic pump is installed on the first water inlet pipe, a first water outlet and a first reflux port are provided at the top of the first-level EGSB reactor, and the horizontal height of the first water outlet is higher than the horizontal height of the first reflux port, the first water outlet is connected to a first water outlet pipe, the first reflux port is connected to one end of the first reflux pipe, the other end of the first reflux pipe is connected to the first water inlet pipe, and the first reflux pipe is provided with a reflux peristaltic pump.

[0012] Furthermore, in a preferred embodiment of the present invention, a second water inlet is provided at the bottom of the secondary EGSB reactor, the first water outlet pipe is connected to the second water inlet, a reflux peristaltic pump is mounted on the first water outlet pipe, a second water outlet and a second reflux port are provided at the top of the secondary EGSB reactor, and the horizontal height of the second water outlet is higher than the horizontal height of the second reflux port, the second water outlet is connected to a second water outlet pipe, the second reflux port is connected to one end of the second reflux pipe, and the other end of the second reflux pipe is connected to the first water outlet pipe.

[0013] Furthermore, in a preferred embodiment of the present invention, a third water inlet is provided at the bottom of the bacteria-algae symbiotic reactor, the third water inlet is connected to the second water outlet pipe, the second water outlet pipe is provided with a reflux peristaltic pump, and a third water outlet is provided at the top of the bacteria-algae symbiotic reactor, the third water outlet is connected to the third water outlet pipe.

[0014] Furthermore, in a preferred embodiment of the present invention, the biofilm reaction zone is formed by bacteria and microalgae attached to the filler via extracellular polymers.

[0015] Furthermore, in a preferred embodiment of the present invention, the annular light sources are alternately wound around the outer wall of the bacteria-algae symbiotic reactor to prevent the light sources from being blocked by the microorganisms in the reactor.

[0016] Furthermore, in a preferred embodiment of the present invention, the inner diameter of the precipitation zone is 20 cm and the height is 15 cm; the inner diameter of the expansion reaction zone is 10 cm and the height is 100 cm; and the angle between the precipitation zone and the expansion reaction zone is an inclination angle of 30°.

[0017] A second aspect of the present invention discloses a control method for a high-concentration liquor brewing wastewater treatment device, which is applied to any of the high-concentration liquor brewing wastewater treatment devices described above, and comprises the following steps:

[0018] Control the start-up of each water inlet peristaltic pump and make the water inlet peristaltic pump start at a water inlet flow rate of 0.0419m 3 / h parameter; at the same time, each reflux peristaltic pump is controlled to start and the reflux peristaltic pump is made to operate at a reflux rate of 0.0209m 3 / h parameter work;

[0019] Liquor brewing wastewater first enters the first-stage EGSB reactor. Once inside, the sludge particles absorb water and fluidize and expand. The COD in the wastewater is decomposed into biogas by anaerobic bacteria. The biogas is discharged into the gas collecting chamber through the three-phase separator. The sludge-water mixture then enters the sedimentation zone through the three-phase separator. The sludge settles, and the wastewater forms the first-stage effluent and flows out in an overflow manner.

[0020] The primary effluent enters the secondary EGSB reactor. When the wastewater enters the secondary EGSB reactor, the sludge particles absorb water and then fluidize and expand. The COD in the primary effluent is decomposed into biogas by anaerobic bacteria. The biogas is discharged into the gas collecting chamber through the three-phase separator. The mud-water mixture enters the sedimentation area through the three-phase separator. The sludge settles and the wastewater forms the secondary effluent and flows out in an overflow manner.

[0021] After the secondary effluent enters the bacteria-algae symbiotic reactor, the algae cells in the biofilm reaction zone increase the dissolved oxygen concentration in the wastewater through photosynthesis and remove nitrogen and phosphorus pollutants. Bacteria use the oxygen produced by the algae cells to remove nitrogen, phosphorus and remaining organic pollutants in the wastewater, and finally discharge it through overflow.

[0022] Among them, the dry weight of algae inoculation in the biofilm reaction zone is about 4g / L, and the sludge inoculation is about 4g / L; the sludge inoculation in the expansion reaction zone of the EGSB reactor is about 10.9g / L, and sludge is discharged every 48h.

[0023] Furthermore, in a preferred embodiment of the present invention, the following steps are also included:

[0024] The water inlet of the EGSB reactor is continuously fed at a constant flow rate, and the granular sludge is expanded by hydraulic load; the sludge enters the sedimentation zone through the three-phase separator, and then sinks into the expansion reaction zone through the reflux gap between the three-phase separator and the EGSB reactor.

[0025] Furthermore, in a preferred embodiment of the present invention, the following steps are also included:

[0026] After the liquor brewing wastewater first enters the first-stage EGSB reactor, the wastewater flows upward rapidly and produces gas, causing the granular sludge to expand. When the wastewater reaches 100 cm above the container, the wastewater enters the sedimentation zone instead of the expansion reaction zone. The wastewater flow rate decreases, and the mud and water are separated under the action of the three-phase separator.

[0027] The sludge sinks back to the expansion reaction zone, and the generated gas is introduced into the gas collecting chamber through the exhaust pipe. Part of the first-level effluent overflows from the first outlet pipe, and another part of the first-level effluent is refluxed through the peristaltic pump; the first-level effluent entering the secondary EGSB reactor undergoes the same treatment; part of the secondary effluent enters the bacteria-algae symbiosis reactor.

[0028] The present invention solves the technical defects existing in the background technology and has the following beneficial effects:

[0029] (1) High COD load and high COD removal rate. The granular sludge in the two-stage EGSB reactor is in a swelling state, which allows the influent to fully contact the granular sludge, improves the mass transfer efficiency, facilitates the diffusion and transmission of substrates and metabolites in and out of the granular sludge, and has strong resistance to shock loads.

[0030] (2) Reduced operating costs. After the bacterial-algal biofilm system stabilizes, the algal cells produce a large amount of dissolved oxygen through photosynthesis, which reduces mechanical aeration and reduces operating costs.

[0031] (3) Efficiently remove nitrogen, phosphorus and organic matter from wastewater. The three reactors remove pollutants from the wastewater in sequence. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying any creative work, they can also obtain drawings of other embodiments based on these drawings.

[0033] Figure 1 Specific flow chart for the implementation of the present invention;

[0034] Figure 2 Schematic diagram of the structure of the EGSB reactor of the present invention;

[0035] The description of the accompanying numbers is as follows: 1-water inlet peristaltic pump; 2-light shielding plate; 3-water bath insulation layer; 4-expansion reaction zone; 5-sludge particles; 6-heating rod; 7-three-phase separator; 8-sedimentation zone; 9-lid; 10-gas collecting chamber; 11-third water outlet; 12-bacteria and algae biofilm zone; 13-annular light source; 14-reflux peristaltic pump; 15-reflux direction; 16-sludge discharge port. DETAILED DESCRIPTION

[0036] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner. Therefore, they only show the structures related to the present invention. It should be noted that, unless there is a conflict, the embodiments in this application and the features in the embodiments can be combined with each other.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0039] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present disclosure.

[0040] like Figure 1 、 2 As shown, the first aspect of the present invention discloses a high-concentration liquor brewing wastewater treatment device, which includes a primary EGSB reactor, a secondary EGSB reactor and a bacteria-algae symbiotic reactor.

[0041] The first-stage EGSB reactor has the same structure as the second-stage EGSB reactor. A water bath insulation layer 3 is provided inside the EGSB reactor, and a light shielding plate 2 is provided outside the water bath insulation layer 3. An expansion reaction zone 4 is provided below the EGSB reactor. A plurality of sludge particles 5 are provided in the expansion reaction zone 4. After absorbing water, the sludge particles 5 are in an expanded and fluidized state. A sludge discharge port 16 is also provided at the bottom of the EGSB reactor.

[0042] A sedimentation zone 8 is provided above the EGSB reactor. A reflux seam and an air seal are provided at the junction of the sedimentation zone 8 and the expansion reaction zone 4. The sedimentation zone, reflux seam and air seal form a three-phase separator 7, which separates biogas, sludge and liquid. The three-phase separator 7 is connected to the gas collecting chamber 10 through an exhaust pipe.

[0043] Several biofilm reaction zones are arranged in sequence along the axial direction in the bacteria-algae symbiotic reactor, and an annular light source 13 is arranged outside the biofilm reaction zones.

[0044] A first water inlet is provided at the bottom of the first-level EGSB reactor, a first water inlet pipe is connected to the first water inlet, and a water inlet peristaltic pump 1 is installed on the first water inlet pipe. A first water outlet and a first reflux port are provided at the top of the first-level EGSB reactor, and the horizontal height of the first water outlet is higher than the horizontal height of the first reflux port, the first water outlet is connected to the first water outlet pipe, the first reflux port is connected to one end of the first reflux pipe, the other end of the first reflux pipe is connected to the first water inlet pipe, and the first reflux pipe is installed with a reflux peristaltic pump 14.

[0045] A second water inlet is provided at the bottom of the secondary EGSB reactor, the first water outlet pipe is connected to the second water inlet, and a reflux peristaltic pump 14 is mounted on the first water outlet pipe. A second water outlet and a second reflux port are provided at the top of the secondary EGSB reactor, and the horizontal height of the second water outlet is higher than the horizontal height of the second reflux port. The second water outlet is connected to a second water outlet pipe, the second reflux port is connected to one end of the second reflux pipe, and the other end of the second reflux pipe is connected to the first water outlet pipe.

[0046] A third water inlet is provided at the bottom of the bacteria-algae symbiotic reactor, and the third water inlet is connected to the second water outlet pipe. A reflux peristaltic pump 14 is installed on the second water outlet pipe. A third water outlet 11 is provided at the top of the bacteria-algae symbiotic reactor, and the third water outlet 11 is connected to the third water outlet pipe.

[0047] The biofilm reaction zone is composed of bacteria and microalgae attached to the filler through extracellular polymers.

[0048] The annular light sources 13 are alternately wound around the outer wall of the bacteria-algae symbiotic reactor to prevent the microorganisms in the reactor from blocking the light source.

[0049] It should be noted that the ring-shaped light source can be an LED light strip, which can avoid uneven lighting and effectively increase light utilization efficiency. Furthermore, the lighting of the present invention simulates the cycle of day and night. The light source is evenly wrapped around the reactor to prevent microorganisms in the reactor from blocking the light source. The lighting duration is controlled by a timer (the light-dark ratio is set to 12 hours).

[0050] The inner diameter of the precipitation zone 8 is 20 cm and the height is 15 cm; the inner diameter of the expansion reaction zone 4 is 10 cm and the height is 100 cm; the angle between the precipitation zone 8 and the expansion reaction zone 4 is an inclination angle of 30°.

[0051] It should be noted that the expansion of sludge particles 5 in the two-stage EGSB reactor efficiently removes high COD from liquor brewing wastewater. In the bacteria-algae symbiotic reactor, bacteria and algae synergistically remove nitrogen and phosphorus from the wastewater, resulting in efficient and low-cost removal of nitrogen, phosphorus, and organic matter from the wastewater. The specific scheme of the present invention is as follows: Wastewater treated by the screen and regulating tank first enters the first-stage EGSB reactor. The high hydraulic load and high gas production load cause the sludge particles 5 to expand, allowing them to fully contact the wastewater. At this time, anaerobic bacteria, acting through the light shield 2, digest the high COD in the wastewater into biogas in the reaction zone. The biogas is discharged through the three-phase separator 7 and into the gas collection chamber 10. The sludge-water mixture passes through the three-phase separator 7 and enters the sedimentation zone 8, where the sludge settles. A portion of the first-stage effluent is returned through a peristaltic pump; another portion of the first-stage effluent overflows from the first outlet pipe and enters the second-stage EGSB reactor for the same reaction to remove the remaining COD. A portion of the second-stage effluent is then returned by the peristaltic pump, and a portion enters the bacteria-algae symbiotic reactor. After entering the bacteria-algae symbiotic reactor, the algae cells produce oxygen through photosynthesis, increasing the dissolved oxygen concentration in the wastewater. The bacteria can use the oxygen in the wastewater to metabolize ammonia nitrogen, organic matter, etc. in the wastewater; the bacteria and algae work together to treat nitrogen and phosphorus in the wastewater; finally, the effluent enters the water collection bucket through the overflow port.

[0052] A second aspect of the present invention discloses a control method for a high-concentration liquor brewing wastewater treatment device, which is applied to any of the high-concentration liquor brewing wastewater treatment devices described above, and comprises the following steps:

[0053] Control the start-up of each water inlet peristaltic pump and make the water inlet peristaltic pump start at a water inlet flow rate of 0.0419m 3 / h parameter; at the same time, each reflux peristaltic pump is controlled to start and the reflux peristaltic pump is made to operate at a reflux rate of 0.0209m 3 / h parameter work;

[0054] Liquor brewing wastewater first enters the first-stage EGSB reactor. Once inside, the sludge particles absorb water and fluidize and expand. The COD in the wastewater is decomposed into biogas by anaerobic bacteria. The biogas is discharged into the gas collecting chamber through the three-phase separator. The sludge-water mixture then enters the sedimentation zone through the three-phase separator. The sludge settles, and the wastewater forms the first-stage effluent and flows out in an overflow manner.

[0055] The primary effluent enters the secondary EGSB reactor. When the wastewater enters the secondary EGSB reactor, the sludge particles absorb water and then fluidize and expand. The COD in the primary effluent is decomposed into biogas by anaerobic bacteria. The biogas is discharged into the gas collecting chamber through the three-phase separator. The mud-water mixture enters the sedimentation area through the three-phase separator. The sludge settles and the wastewater forms the secondary effluent and flows out in an overflow manner.

[0056] After the secondary effluent enters the bacteria-algae symbiotic reactor, the algae cells in the biofilm reaction zone increase the dissolved oxygen concentration in the wastewater through photosynthesis and remove nitrogen and phosphorus pollutants. Bacteria use the oxygen produced by the algae cells to remove nitrogen, phosphorus and remaining organic pollutants in the wastewater, and finally discharge it through overflow.

[0057] Among them, the dry weight of algae inoculation in the biofilm reaction zone is about 4g / L, and the sludge inoculation is about 4g / L; the sludge inoculation in the expansion reaction zone of the EGSB reactor is about 10.9g / L, and sludge is discharged every 48h.

[0058] It should be noted that the flow calculation formula is used to calculate Q = 0.0628 m 3 / h, Q1=0.0419m 3 / h, Q2 is 0.0209m 3 / h. The flow calculation formula is:

[0059] ,

[0060] Among them, U is the rising flow rate; Q is the water flow rate in m / h, the unit is m 3 / h; A is the cross-sectional area of ​​the expansion reaction zone; U1 is the rising velocity at the top of the tower; A1 is the cross-sectional area of ​​the precipitation zone; Q1 is the water flow rate of the water peristaltic pump, the unit is m 3 / h; Q2 is the reflux flow rate, the unit is m 3 / h; D is the flow rate at the top of the tower, the unit is m 3 / h; is the reflux ratio.

[0061] Furthermore, in a preferred embodiment of the present invention, the following steps are also included:

[0062] The water inlet of the EGSB reactor is continuously fed at a constant flow rate, and the granular sludge is expanded by hydraulic load; the sludge enters the sedimentation zone through the three-phase separator, and then sinks into the expansion reaction zone through the reflux gap between the three-phase separator and the EGSB reactor.

[0063] Furthermore, in a preferred embodiment of the present invention, the following steps are also included:

[0064] After the liquor brewing wastewater first enters the first-stage EGSB reactor, the wastewater flows upward rapidly and produces gas, causing the granular sludge to expand. When the wastewater reaches 100 cm above the container, the wastewater enters the sedimentation zone instead of the expansion reaction zone. The wastewater flow rate decreases, and the mud and water are separated under the action of the three-phase separator.

[0065] The sludge sinks back to the expansion reaction zone, and the generated gas is introduced into the gas collecting chamber through the exhaust pipe. Part of the first-level effluent overflows from the first outlet pipe, and another part of the first-level effluent is refluxed through the peristaltic pump; the first-level effluent entering the secondary EGSB reactor undergoes the same treatment; part of the secondary effluent enters the bacteria-algae symbiosis reactor.

[0066] It should be noted that the parameters of the two-stage EGSB column reactor are the same. The parameters of the EGSB column reactor are: the inner diameter of the precipitation zone is 20 cm, the height is 15 cm, the inner diameter of the expansion reaction zone is 10 cm, and the bottom area of ​​the expansion reaction zone is 78.5 cm. 2 The bottom of the reactor is circular and 100 cm high. The precipitation zone and the expansion reaction zone have an inclination angle of 30°. The overflow zone above is 5 cm high. The drain pipe is 125 cm from the bottom. The height-to-diameter ratio of the entire reactor is 1:10. The flow rate of the peristaltic pump water is 0.0419 m 3 / h. The peristaltic pump reflux flow rate is L: 0.0209m 3 / h. A sludge drain pipe is located 3 cm from the bottom of the reactor. A constant-temperature water bath heater is installed outside the reactor body, and a sunshade is installed outside the water bath heater. A water inlet is located at the bottom of the body and a drain outlet is located at the top. The water inlet pipe is connected to the return pipe.

[0067] The parameters of the bacterial algae biofilm column reactor are as follows: the inner diameter of the overflow zone is 30 cm, the height is 5 cm, the height of the bacterial algae biofilm zone is 42 cm, and the bottom area of ​​the reactor is 78.5 cm 2 The reactor has a circular bottom, with a 30 cm bottom height. The biofilm zone and sludge zone have a 10 cm inclination angle of 30°. The overflow zone above is 5 cm high, and the drain pipe is 70 cm from the bottom. A constant temperature water bath heater is installed outside the reactor body. The water inlet is set at the bottom of the body and the drain outlet is set at the top. The water inlet pipe is connected to a peristaltic pump. The specific treatment steps are as follows:

[0068] 1. Grille

[0069] (1) Coarse screen: The aperture is 50 mm, the total number of bars is 25, and the installation angle is 60°; it removes larger floating objects in the wastewater;

[0070] (2) Fine screen: The aperture is 5 mm, the total number of bars is 45, and the installation angle is 60°; it can remove finer particles and suspended matter in wastewater.

[0071] 2. Regulating pool

[0072] The total pool height (H) is 40 cm, with an extra height of 5 cm. The effective water depth (h) is 35 cm. The pool length (L) is 40 cm, and the pool width (B) is 40 cm. The total pool dimensions are L × B × H = 40 × 40 × 35 = 56,000 cm³. Wastewater treated by the screen enters the regulating tank, where water quality and quantity are adjusted. Agitation is also used to ensure a more uniform effluent quality.

[0073] 3. First-stage EGSB reactor

[0074] By controlling the water pump, the water inlet flow rate is first 0.0419 m 3 / h, the wastewater level rises to the expansion reaction zone. Due to the high hydraulic load and backflow, the rising speed increases, the granular sludge expands, and the wastewater fully contacts the expanded granular sludge. At this time, anaerobic bacteria, under the action of the light shield, decompose the high COD in the wastewater into biogas. The liquid level continues to rise, and the biogas is discharged into the gas collection chamber through the three-phase separator. The mud and water mixture enters the sedimentation zone through the three-phase separator, where the sludge settles and the effluent overflows and is discharged through the drain. Part of the first-stage effluent is returned to the water inlet through the peristaltic pump, and part enters the second-stage EGSB reactor.

[0075] 4. Secondary EGSB reactor

[0076] The inlet and return flow rates are set identically to those of the primary EGSB reactor, aiming to remove the remaining COD from the liquor brewing wastewater after the same reaction. The effluent is discharged through the overflow outlet, while part of the secondary effluent is returned via a peristaltic pump and part enters the bacteria-algae symbiotic reactor.

[0077] 5. Bacteria-algae symbiotic reactor

[0078] Wastewater enters the bacteria-algae symbiotic reactor. Under the influence of an external light source, the algae produce oxygen through photosynthesis, increasing the dissolved oxygen concentration in the wastewater. The bacteria utilize the dissolved oxygen in the water for respiratory metabolism. The bacteria and algae work together to treat nitrogen and phosphorus in the wastewater. The effluent eventually flows out through the drain outlet.

[0079] 6. Water collection bucket

[0080] The water flows into the water collection bucket.

[0081] In addition, the control method further comprises the following steps:

[0082] Acquire first physical and chemical data information of the water in the regulating tank, and acquire second physical and chemical data information of the water in the water collecting bucket;

[0083] Constructing a sewage purification performance evaluation system, determining evaluation indicators based on the first physical and chemical data information, and determining evaluation scores based on the second physical and chemical data information; calculating weight values ​​between the evaluation indicators and the evaluation scores by using the hierarchical analysis method; and comparing the weight values ​​with preset weight values.

[0084] If the weight value is greater than the preset weight value, the real-time working status of the first-level EGSB reactor, the second-level EGSB reactor, and the bacteria-algae symbiosis reactor is obtained, and the real-time working status of the first-level EGSB reactor, the second-level EGSB reactor, and the bacteria-algae symbiosis reactor are associated to obtain a correlation text;

[0085] Obtain one or more abnormal sub-devices based on the weight value and the association text;

[0086] The one or more abnormal sub-devices are introduced into the Bayesian network for secondary simulation association to obtain a final abnormal sub-device, and the final abnormal sub-device is output.

[0087] It should be noted that physical and chemical data includes temperature, organic matter concentration, oxygen concentration, and other information. This data can be obtained through temperature sensors, organic matter concentration sensors, oxygen concentration sensors, and other sensors. By comparing the physical and chemical data of the wastewater before and after purification, a weight value for the wastewater after treatment is determined. If the weight value is greater than a preset value, the quality of the treated wastewater is unacceptable. This could indicate a malfunction in certain sub-devices within the reactor. For example, if the nitrogen and phosphorus concentrations in the wastewater after treatment are excessively high, this could indicate an abnormality in the bacterial and algal biofilm area within the device. This method can quickly detect abnormal sub-devices within the device.

[0088] In addition, the control method further comprises the following steps:

[0089] The standard spectral image information of the water body in the bacteria-algae symbiotic reactor under each preset environment is obtained through the big data network, and the standard spectral image information of the water body in the bacteria-algae symbiotic reactor under each preset environment is divided into a training data book and a verification data book;

[0090] Constructing a recognition model based on a convolutional neural network, inputting the training data into a convolution layer in the recognition model for convolution processing to obtain a convolution value, inputting the convolution value into a pooling layer, and pooling the convolution feature value using a maximum pooling method;

[0091] Based on the maximum pooling method, the maximum number is selected in each convolution layer as the feature value of the area where the current convolution value is located, and the feature values ​​of the area where the current convolution value is located are fused. Finally, the parameter backpropagation training is performed through the loss function until the error converges to the preset value, and the current recognition model is tested with the verification data. When the test result meets the preset test result, the model parameters are saved to obtain the trained recognition model;

[0092] Acquiring real-time environmental parameters of the bacteria-algae symbiotic reactor, importing the real-time environmental parameters into the trained recognition model, and obtaining preset standard spectral image information;

[0093] Acquire real-time spectral image information in the bacteria-algae symbiotic reactor, and calculate the similarity between the preset standard spectral image information and the real-time spectral image information by using a grey correlation analysis method;

[0094] If the similarity is not greater than the preset similarity, an alarm message is generated and output.

[0095] It should be noted that environmental parameters include temperature intensity, light intensity, etc. The spectral images of the bacteria-algae symbiosis reactor are different under different environmental parameters. Through this method, it is possible to judge in real time whether the purification effect of the bacteria-algae symbiosis reactor is qualified based on the real-time environmental parameters of the bacteria-algae symbiosis reactor. If it is unqualified, an alarm message will be generated in time to inform the user to inspect and repair the equipment to ensure the wastewater purification effect.

[0096] The above description of the preferred embodiments of the present invention is provided as a guide, and while the description is relatively specific and detailed, it should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A control method for a high-concentration liquor brewing wastewater treatment device, characterized by: The treatment device includes a primary EGSB reactor, a secondary EGSB reactor, a bacteria-algae symbiotic reactor, a regulating tank and a water collection tank; The regulating tank is arranged at the front end of the first-level EGSB reactor, and the wastewater enters the regulating tank and then enters the first-level EGSB reactor; the water collection tank is arranged at the rear end of the bacteria-algae symbiosis reactor, and the wastewater enters the water collection tank after being treated by the bacteria-algae symbiosis reactor; The first-stage EGSB reactor has the same structure as the second-stage EGSB reactor. A water bath insulation layer is provided inside the EGSB reactor, and a light shield is provided outside the water bath insulation layer. An expansion reaction zone is provided below the EGSB reactor. A plurality of sludge particles are provided in the expansion reaction zone. After absorbing water, the sludge particles are in an expanded and fluidized state. A sludge discharge port is also provided at the bottom of the EGSB reactor. A settling zone is provided above the EGSB reactor. A reflux seam and an air seal are provided at the junction of the settling zone and the expansion reaction zone. The settling zone, the reflux seam and the air seal form a three-phase separator, which separates biogas, sludge and liquid. The three-phase separator is connected to the gas collecting chamber through an exhaust pipe. A plurality of biofilm reaction zones are arranged in sequence along the axis in the bacteria-algae symbiotic reactor, and an annular light source is arranged outside the biofilm reaction zones; The annular light sources are alternately wound around the outer wall of the bacteria-algae symbiotic reactor to prevent the microorganisms in the reactor from blocking the light sources; The inner diameter of the precipitation zone is 20 cm and the height is 15 cm; the inner diameter of the expansion reaction zone is 10 cm and the height is 100 cm; the angle between the precipitation zone and the expansion reaction zone is an inclination angle of 30°; The control method includes: Liquor brewing wastewater first enters the first-stage EGSB reactor. Once inside, the sludge particles absorb water and fluidize and expand. The COD in the wastewater is decomposed into biogas by anaerobic bacteria. The biogas is discharged into the gas collecting chamber through the three-phase separator. The sludge-water mixture then enters the sedimentation zone through the three-phase separator. The sludge settles, and the wastewater forms the first-stage effluent and flows out in an overflow manner. The primary effluent enters the secondary EGSB reactor. When the wastewater enters the secondary EGSB reactor, the sludge particles absorb water and then fluidize and expand. The COD in the primary effluent is decomposed into biogas by anaerobic bacteria. The biogas is discharged into the gas collecting chamber through the three-phase separator. The mud-water mixture enters the sedimentation area through the three-phase separator. The sludge settles and the wastewater forms the secondary effluent and flows out in an overflow manner. After the secondary effluent enters the bacteria-algae symbiotic reactor, the algae cells in the biofilm reaction zone increase the dissolved oxygen concentration in the wastewater through photosynthesis and remove nitrogen and phosphorus pollutants. Bacteria use the oxygen produced by the algae cells to remove nitrogen, phosphorus and remaining organic pollutants in the wastewater, and finally discharge it through overflow. The dry weight of algae inoculum in the biofilm reaction zone was 4 g / L, and the sludge inoculum was 4 g / L. The sludge inoculum in the expansion reaction zone of the EGSB reactor was 10.9 g / L, and sludge was discharged every 48 hours. The following steps are also included: The standard spectral image information of the water body in the bacteria-algae symbiosis reactor under each preset environment is obtained through the big data network, and the standard spectral image information of the water body in the bacteria-algae symbiosis reactor under each preset environment is divided into a training data book and a verification data book; Constructing a recognition model based on a convolutional neural network, inputting the training data into a convolution layer in the recognition model for convolution processing to obtain a convolution value, inputting the convolution value into a pooling layer, and pooling the convolution value using a maximum pooling method; Based on the maximum pooling method, the maximum number is selected in each convolution layer as the feature value of the area where the current convolution value is located, and the feature values ​​of the area where the current convolution value is located are fused. Finally, the parameter backpropagation training is performed through the loss function until the error converges to the preset value, and the current recognition model is tested with the verification data. When the test result meets the preset test result, the model parameters are saved to obtain the trained recognition model; Acquiring real-time environmental parameters of the bacteria-algae symbiotic reactor, importing the real-time environmental parameters into the trained recognition model, and obtaining preset standard spectral image information; Acquire real-time spectral image information in the bacteria-algae symbiotic reactor, and calculate the similarity between the preset standard spectral image information and the real-time spectral image information by using a grey correlation analysis method; If the similarity is not greater than a preset similarity, generating an alarm message and outputting the alarm message; Also includes: Obtaining first physical and chemical data information of the water in the regulating tank, obtaining second physical and chemical data information of the water in the water collection bucket, and comparing the physical and chemical data information of the wastewater before and after purification; Constructing a sewage purification performance evaluation system, determining an evaluation index based on the first physical and chemical data information, and determining an evaluation score based on the second physical and chemical data information; calculating a weight value between the evaluation index and the evaluation score using a hierarchical analysis method; and comparing the weight value with a preset weight value; If the weight value is greater than the preset weight value, the real-time working status of the first-level EGSB reactor, the second-level EGSB reactor, and the bacteria-algae symbiosis reactor is obtained, and the real-time working status of the first-level EGSB reactor, the second-level EGSB reactor, and the bacteria-algae symbiosis reactor are associated to obtain a correlation text; Obtain one or more abnormal sub-devices based on the weight value and the association text; The one or more abnormal sub-devices are introduced into the Bayesian network for secondary simulation association to obtain a final abnormal sub-device, and the final abnormal sub-device is output.

2. The control method of a high-concentration liquor brewing wastewater treatment device according to claim 1, characterized in that: A first water inlet is provided at the bottom of the first-level EGSB reactor, a first water inlet pipe is connected to the first water inlet, and a water inlet peristaltic pump is installed on the first water inlet pipe. A first water outlet and a first reflux port are provided at the top of the first-level EGSB reactor, and the horizontal height of the first water outlet is higher than the horizontal height of the first reflux port, the first water outlet is connected to the first water outlet pipe, the first reflux port is connected to one end of the first reflux pipe, the other end of the first reflux pipe is connected to the first water inlet pipe, and the first reflux pipe is installed with a reflux peristaltic pump.

3. The control method of a high-concentration liquor brewing wastewater treatment device according to claim 2, characterized in that: A second water inlet is provided at the bottom of the secondary EGSB reactor, the first water outlet pipe is connected to the second water inlet, a reflux peristaltic pump is mounted on the first water outlet pipe, a second water outlet and a second reflux port are provided at the top of the secondary EGSB reactor, and the horizontal height of the second water outlet is higher than the horizontal height of the second reflux port, the second water outlet is connected to a second water outlet pipe, the second reflux port is connected to one end of the second reflux pipe, and the other end of the second reflux pipe is connected to the first water outlet pipe.

4. The control method for a high-concentration liquor brewing wastewater treatment device according to claim 3, characterized in that: The bottom of the bacteria-algae symbiotic reactor is provided with a third water inlet, the third water inlet is connected to the second water outlet pipe, the second water outlet pipe is provided with a reflux peristaltic pump, the top of the bacteria-algae symbiotic reactor is provided with a third water outlet, the third water outlet is connected to the third water outlet pipe; the water inlet peristaltic pump is controlled to start and the water inlet peristaltic pump is operated at an inlet flow rate of 0.0419m 3 / h parameter; at the same time, each reflux peristaltic pump is controlled to start and the reflux peristaltic pump is made to operate at a reflux rate of 0.0209m 3 / h parameter works.

5. The control method for a high-concentration liquor brewing wastewater treatment device according to claim 1, characterized in that: The biofilm reaction zone is composed of bacteria and microalgae attached to the filler through extracellular polymers.

6. The control method for a high-concentration liquor brewing wastewater treatment device according to claim 1, further comprising: The water inlet of the EGSB reactor is continuously fed at a constant flow rate, and the sludge particles are expanded by hydraulic load; the sludge enters the sedimentation zone through the three-phase separator, and then sinks into the expansion reaction zone through the reflux gap between the three-phase separator and the EGSB reactor.

7. The control method for a high-concentration liquor brewing wastewater treatment device according to claim 1, further comprising: After the liquor brewing wastewater first enters the first-stage EGSB reactor, the wastewater flows upward rapidly and produces gas, causing the sludge particles to expand. When the wastewater reaches 100 cm above the first-stage EGSB reactor, the wastewater enters the sedimentation zone instead of the expansion reaction zone. The wastewater flow rate decreases, and the mud and water are separated under the action of the three-phase separator. The sludge sinks back to the expansion reaction zone, and the generated gas is introduced into the gas collecting chamber through the exhaust pipe. A part of the first-stage effluent overflows from the first outlet pipe, and the other part of the first-stage effluent is returned through the peristaltic pump. The first-stage effluent entering the secondary EGSB reactor undergoes the same treatment; A portion of the secondary effluent enters the bacteria-algae symbiotic reactor.

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