Complete mixing type anaerobic digestion reactor device suitable for harmless treatment of antibiotic mushroom dregs

Abstract

The utility model discloses a full-mixing type anaerobic digestion reactor device suitable for harmless treatment of antibiotic mushroom dregs, and relates to the technical field of digestion reactors. The device comprises a digestion tank, the digestion tank is provided with a built-in stirrer, a defoaming stirrer, a baffle plate, a tank bottom emptying port, a circulating sludge outlet, a circulating sludge inlet, a water inlet pipe, a biogas outlet and a middle water outlet. According to the utility model, the organic matter degradation and conversion efficiency is improved, the reaction efficiency is improved, and the accumulation amount of a scum layer and bottom sediments is reduced, so that the effective volume of the digestion tank is improved; the digestion tank adopts the design of ultra-large volume, large accommodation degree, continuous feeding and continuous discharging, and can utilize the complementary effect of various organic matters to digest a large amount of organic wastes and completely decompose residues at the same time, so that high-quality compost products and biogas are obtained.

Description

Technical Field

[0001] The utility model belongs to the technical field of digestion reactors, in particular to a fully mixed anaerobic digestion reactor device suitable for harmless treatment of antibiotic bacterial residues. Background Art

[0002] The basic materials for antibiotic fermentation are mainly agricultural and sideline products and inorganic salts. The carbon source mainly undergoes energy metabolism, aerobic degradation, oxidation into carbon dioxide and water and releases a large amount of energy, and another part enters the bacteria or products. The nitrogen source metabolism mainly enters the bacteria and synthesizes cells. The fermentation liquid is extracted and filtered, and a large amount of solid waste residues of the bacteria need to be disposed of harmlessly. Generally, the residue contains 8-12% dry matter, the organic content reaches 90%, the protein content is 20-25%, and the ash content is about 10%. The main methods of solid waste of fermentation liquid residue in China are drying, landfilling, incineration, composting, feed and biological fermentation. For antibiotic residues, incineration is often required to achieve harmlessness, which wastes a lot of energy, has high energy consumption, low biomass recycling rate, and cannot achieve harmless treatment of residual antibiotics, which has a great impact on the environment.

[0003] In order to improve the quality and yield of antibiotic products, microfiltration membrane filtration measures are used for fermentation broth filtration. The circulating pump repeatedly shears and the membrane surface cross-flows and shears, and the membrane slurry becomes a solid sol fluid state. The difficulty of further processing of the membrane slurry is greatly increased. Direct drying and incineration consumes too much energy. Solid-liquid separation is inseparable, and the addition of flocculants is also inseparable. Solid waste management measures have seriously restricted the normal development of enterprises.

[0004] After analyzing the fermentation residue, this technical solution adopts a large fully mixed anaerobic digestion reactor device suitable for harmless treatment of antibiotic residue, which can achieve harmless treatment, reduction and resource utilization of antibiotic residue; convert low-grade biomass energy in the residue into high-grade biogas; the residue produced by anaerobic digestion treatment is stable and easy to dehydrate, and can be used to make agricultural fertilizer; at the same time, the ammonia nitrogen content in the biogas liquid decomposed by bacterial protein is high, and it can also be used to make agricultural fertilizer, fundamentally realizing energy conservation and emission reduction. This device has gradually demonstrated its own advantages in the process of engineering practice. With large-scale promotion and implementation, it is predicted that it can provide a new process result with high efficiency, energy saving and resource recycling for the fermentation industry. Utility Model Content

[0005] The utility model provides a fully mixed anaerobic digestion reactor device suitable for harmless treatment of antibiotic bacterial residues. The stirring device and the baffle assembly in the digestion tank can achieve close and effective contact between degraded organic matter and microorganisms, thereby improving the degradation and conversion efficiency of organic matter, improving the efficiency of the reactor, reducing the amount of accumulated scum layer and bottom sediment, and thus increasing the effective volume of the digestion tank; the digestion tank adopts an ultra-large volume, a large capacity, and a continuous feeding and continuous discharging design, and can utilize the complementary effects of various organic matter to digest a large amount of organic waste while completely digesting the residual antibiotics, and obtain high-quality compost products and biogas; in summary, the problems in the background technology are solved.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model discloses a fully mixed anaerobic digestion reactor device suitable for harmless treatment of antibiotic bacterial residues, comprising a digestion tank sitting on a tank bottom plate;

[0008] A built-in stirrer is installed in the middle of the top of the digester tank through a stirring motor, and a defoaming stirrer is installed on the side of the tank top plate of the digester tank through a defoaming stirrer installation port; a plurality of vertically arranged baffles are installed around the inner wall of the digester tank; a tank bottom emptying port, a circulating sludge outlet and a circulating sludge inlet are arranged at the bottom of the digester tank; a water inlet pipe and a biogas outlet are installed at the top of the digester tank, and a water inlet branch pipe connected to the digester tank is arranged on the water inlet pipe; a middle water outlet is arranged on the middle side of the digester tank;

[0009] The water inlet pipe is connected to the water inlet pipeline for water supply;

[0010] The middle water outlet is connected to the top of the homogenizing tank through a pipeline, the bottom of the homogenizing tank is connected to the circulating sludge inlet through a pipeline with a first centrifugal pump, and the top of the homogenizing tank is also connected to the bottom of the solid-liquid waste configuration tank through a pipeline with a slurry self-priming pump;

[0011] The biogas outlet is connected to the biogas tank through a pipeline with a gas flow meter; the circulating sludge outlet is connected to the original sewage treatment device through a pipeline with a second centrifugal pump;

[0012] An upper liquid outlet is provided on the inner wall of the digestion tank below the defoaming agitator, and the upper liquid outlet is connected to the solid flow sedimentation tank through a pipeline; the bottom of the solid flow sedimentation tank is connected to the original sewage treatment device through a pipeline with a third centrifugal pump; an exhaust pipe is provided on the top of the solid flow sedimentation tank; the original sewage treatment device returns the filtered liquid and the sludge after the liquid is discharged to the conditioning tank through the pipeline.

[0013] Furthermore, the digester tank includes a cylinder body made of carbon steel and an outer tank insulation layer arranged outside the cylinder body.

[0014] Furthermore, the tank top plate is provided with a negative pressure protection water seal connected to the digester tank, two shaft seal water supply pipes, an inspection port and a high pressure protection port.

[0015] Furthermore, a pH meter interface, a sampling port, a thermometer interface, a pressure gauge interface, a water supply port and a manhole are provided on the side of the digestion tank.

[0016] Furthermore, a ladder reaching the tank top plate is installed on the outer side of the digester tank.

[0017] Furthermore, the raw sewage treatment device adopts a flap filter.

[0018] Furthermore, a lightning rod is installed on the tank top plate.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] (1) The stirring device and baffle assembly in the digester of the present technical solution can achieve close and effective contact between degradable organic matter and microorganisms, thereby improving the degradation and conversion efficiency of organic matter, improving the efficiency of the reactor, reducing the amount of scum layer and bottom sediment accumulation, and thus increasing the effective volume of the digester;

[0021] (2) The digester has an ultra-large volume, large capacity, and a design with continuous feeding and continuous discharging. It can utilize the complementary effects of various organic matter to digest a large amount of organic waste while completely digesting the residual resistance and obtaining high-quality compost products and biogas;

[0022] (3) The digested materials can be processed through a solid flow sedimentation tank and a raw sewage treatment plant to achieve solid-liquid separation. The stable biogas residue can be composted or further made into fertilizer products. The biogas liquid enters the sewage treatment system and the biogas enters the coal-fired or gas-fired boiler to replace part of the fuel.

[0023] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 This is an overall structural diagram of the fully mixed anaerobic digestion reactor of the utility model suitable for harmless treatment of antibiotic bacterial residues, combined with a solid-liquid waste configuration tank, a homogenization tank, a solid flow sedimentation tank and a biogas cabinet;

[0026] Figure 2 This is a schematic diagram of the structure of a fully mixed anaerobic digestion reactor suitable for harmless treatment of antibiotic bacterial residues according to the utility model;

[0027] Figure 3 for Figure 2 A top view of the structure;

[0028] Figure 4 for Figure 3 A partial enlarged view of position A in the middle;

[0029] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0030] 1-digestion tank, 101-tank outer insulation layer, 102-cylinder, 103-baffle, 104-support, 105-tank top plate, 106-stirring motor, 107-built-in stirrer, 108-defoaming stirrer, 109-lightning rod, 110-pressure gauge interface, 111-tank bottom drain port, 112-water inlet pipe, 113-ladder, 114-manhole, 115-circulating sludge outlet, 116-circulating sludge inlet, 117-upper liquid outlet, 118-negative pressure protection water seal, 119-inspection port , 120-shaft seal water supply pipe, 121-biogas outlet, 122-high pressure protection port, 123-defoaming agitator installation port, 124-pH meter interface, 125-sampling port, 126-thermometer interface, 127-gas flow meter, 2-solid-liquid waste configuration tank, 21-slurry self-priming pump, 3-homogenizing tank, 31-first centrifugal pump, 32-middle water outlet, 4-hard flow sedimentation tank, 401-exhaust pipe, 402-second centrifugal pump, 403-third centrifugal pump, 5-biogas cabinet, 6-raw sewage treatment plant. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] In the description of the present invention, it should be understood that terms such as "bottom", "end", "surface", "rear side", "side wall", "interior" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limitations on the present invention.

[0033] See also Figure 1-4 As shown, the fully mixed anaerobic digestion reactor device of the utility model adapted for harmless treatment of antibiotic bacterial residues comprises a digestion tank 1 sitting on a tank bottom plate 105;

[0034] A built-in stirrer 107 is installed in the middle of the top of the digester 1 through a stirring motor 106, and a defoaming stirrer 108 is installed on the side of the tank top plate 104 of the digester 1 through a defoaming stirrer installation port 123; a plurality of vertically arranged baffles 103 are installed around the inner wall of the digester 1; a tank bottom emptying port 111, a circulating sludge outlet 115 and a circulating sludge inlet 116 are provided at the bottom of the digester 1; a water inlet pipe 112 and a biogas outlet 121 are installed at the top of the digester 1, and a water inlet branch 112 connected to the digester 1 is provided on the water inlet pipe 112. The digestion tank 1 is provided with a middle water outlet 32 ​​at the middle side thereof; the agitator 107 extends into the digestion tank 1, and includes a stirring rod and a stirring blade arranged around the stirring rod; the defoaming agitator 108 is driven by a motor, and a stirrer is installed at the output shaft end at the bottom of the motor, which can defoam the liquid discharged from the upper liquid outlet 117; the internal capacity of the digestion tube 1 is very large, and is set to 2000 cubic meters, 5000 cubic meters and 12000 cubic meters according to the needs of the adaptive scene; the capacity shown in this specific embodiment and the drawings is 5000 cubic meters;

[0035] The water inlet pipe 112 is connected to the water inlet pipeline 129 for water supply, and the water inlet pipe 129 is connected to supply water into the digester 1 so that the digester 1 maintains the required capacity;

[0036] The middle water outlet 32 ​​is connected to the top of the homogenizing tank 3 through a pipeline, the bottom of the homogenizing tank 3 is connected to the circulating sludge inlet 116 through a pipeline with a first centrifugal pump 31, and the top of the homogenizing tank 3 is also connected to the bottom of the solid-liquid waste configuration tank 2 through a pipeline with a slurry self-priming pump 21; a stirrer driven by a top motor is provided in the configuration tank 2, and solid and liquid wastes are input from the top through a pipeline; the configuration tank 2 is made of 304 stainless steel, with a specific built-in capacity of 3 cubic meters, and specific dimensions of 2000 mm in diameter and 1500 mm in height;

[0037] The homogenizing tank 3 is equipped with an agitator driven by a top motor, and a dilution water inlet, an emptying port and a steam inlet are installed on the top through a pipeline; the homogenizing tank 3 is made of stainless steel, with a specific built-in capacity of 5 cubic meters, and specific dimensions of 1800 mm in diameter and 2500 mm in height;

[0038] The biogas outlet 121 is connected to the biogas cabinet 5 through a pipeline with a gas flow meter 127; the circulating sludge outlet 115 is connected to the original sewage treatment device 6 through a pipeline with a second centrifugal pump 402; the gas flow meter 127 can detect the flow data of the biogas in the pipeline in real time;

[0039] An upper liquid outlet 117 is provided on the inner wall of the digestion tank 1 below the defoaming agitator 108, and the upper liquid outlet 117 is connected to the solid flow sedimentation tank 4 through a pipeline; the bottom of the solid flow sedimentation tank 4 is connected to the original sewage treatment device 6 through a pipeline with a third centrifugal pump 403; an exhaust pipe 401 is provided on the upper part of the solid flow sedimentation tank 4; the original sewage treatment device 6 returns the filtered liquid and the sludge after the liquid is discharged to the conditioning tank through the pipeline; the solid flow sedimentation tank 4 is provided with a pipeline connected to the upper liquid outlet 117, directly facing the conical bottom of the bottom; in this specific embodiment, the solid flow sedimentation tank 4 is made of 304 stainless steel and can accommodate 60m 3 The solid flow sedimentation tank 4 has a diameter of 3500 mm and a height of 6000 mm. The raw sewage treatment device 6 adopts a flap filter tank. It has a flap liquid receiving trough outlet, a filtrate outlet and a sludge reflux port, and returns to the digestion tube 1 through the sludge reflux port. The biogas cabinet 5 and the raw sewage treatment device 6 both adopt existing technologies, and their specific structures and working principles are not described in detail in this technical solution.

[0040] The digester 1 includes a cylinder 102 made of carbon steel and an outer insulation layer 101 arranged outside the cylinder 102; the outer insulation layer 101 adopts a structure of aluminum-zinc steel plate wrapped with expanded polystyrene, and has good thermal insulation and structural strength.

[0041] Among them, the tank top plate 104 is provided with a negative pressure protection water seal 118 connected to the digester 1, two shaft seal water supply pipes 120, an inspection port 119 and a high pressure protection port 122.

[0042] The side of the digestion tank 1 is provided with a pH meter interface 124 , a sampling port 125 , a thermometer interface 126 , a pressure gauge interface 110 , a water supply port 128 and a manhole 114 .

[0043] Among them, a ladder 113 is installed on the outer side of the digester tank 1 to reach the tank top plate 104.

[0044] Among them, a lightning rod 109 is installed on the tank top plate 104.

[0045] The specific process technology principle of the fully mixed anaerobic digestion reactor device suitable for harmless treatment of antibiotic bacterial residues corresponding to this technical solution is:

[0046] Anaerobic fermentation is also called anaerobic digestion, biogas fermentation, and methane fermentation. It is the process of degrading complex organic matter into inorganic compounds such as N and P and gases such as methane and carbon dioxide under anaerobic conditions using anaerobic microbial fermentation bacteria, hydrogen-producing and acetic acid-producing bacteria, hydrogen-consuming and acetic acid-consuming bacteria, hydrogen-eating methanogens, and acetic acid-eating methanogens. The anaerobic fermentation process is generally divided into four stages:

[0047] ① Hydrolysis stage: complex organic matter (cellulose, starch, protein, fat) is decomposed into simple water-soluble compounds by hydrolytic enzymes (exoenzymes) (cellulase, cellobiase, amylase, protease, lipase) secreted by fermentation bacteria, which limits the speed of the whole process.

[0048] ② Fermentation and acidification stage: Fermentation bacteria metabolize the hydrolyzates intracellularly, mainly producing organic acids and alcohols (propionic acid, butyric acid, succinic acid, acetic acid and lactic acid), as well as CO2, NH3, H2S and H2.

[0049] ③ Hydrogen and acetic acid production stage (anaerobic oxidation stage): Obligate anaerobic hydrogen and acetic acid production bacteria convert the organic acids and alcohols produced in the previous stage into acetic acid, H2, and CO2; homoacetic acid bacteria synthesize acetic acid from H2 and CO2.

[0050] ④Methanogenesis stage: Acetic acid and H2 are used by methane bacteria (acetic acid-decomposing methane bacteria and H2-oxidizing methane bacteria) to produce methane.

[0051] The main body of the device is an anaerobic digestion reaction tank device, and the supporting systems include a bacterial residue feeding system, a residue liquid filtration device, a biogas cabinet system, etc.

[0052] The fungus residue to be treated enters the anaerobic digestion reactor, the core processing equipment of the device, after slurry preparation and temperature adjustment. The anaerobic digestion reactor adopts a specially designed stirring device, which cooperates with the baffle assembly installed in the tank to enable close and effective contact between the degradable organic matter and the microorganisms, thereby improving the degradation and conversion efficiency of the organic matter and improving the efficiency of the reactor; reducing the accumulation of the scum layer and bottom sediment, thereby increasing the effective volume of the digester; and evenly distributing physical, chemical and biological properties, avoiding excessive local material concentration and inhibiting bacterial activity.

[0053] The stirring design of the fully mixed anaerobic digestion reactor adopts a special dedicated stirring that meets the needs of cooperative fermentation of mutualistic bacteria. It is characterized by low speed, low shear, ultra-large displacement, and low power (12000m3 tank is equipped with 22KW); ultra-large cycle ultra-low shear stress characteristics, with large flow field spatial distribution, on the basis of meeting the "three transmissions and one reaction" of the project, it not only ensures that the spatial position of the mutualistic bacteria remains unchanged, prevents metabolic disorders of intermediate products, but also does not interfere with the accumulation of extracellular polymers. The digestion tank is a biochemical multi-system, for example: a 12000m3 tank, a feed of 12m3 / hr, a design of 10min full mixing, the slurry input is equivalent to a 6000-fold dilution, and there are 6000 yuan in the whole tank. The capacity and diversity have promoted the stability of the anaerobic digestion tank;

[0054] The anaerobic digestion reaction tank is designed with super large volume, large capacity, continuous feeding, and continuous digestion and discharging. The digestion reaction time of the material in the tank is determined according to the basic degradation rate of residual antibiotics and residues. Through long-term anaerobic digestion and the complementary effect of various organic matter, while absorbing a large amount of organic waste, the residual antibiotics are completely digested, and high-quality compost products and biogas can be obtained.

[0055] The digested materials are processed by the solid-liquid separation device. The stable biogas residue can be composted or further made into fertilizer products. The biogas enters the sewage treatment system and the biogas enters the coal-fired and gas-fired boiler to replace part of the fuel. A series of digestion tanks with sizes of 2,000 cubic meters, 5,000 cubic meters, 8,000 cubic meters and 12,000 cubic meters have been formed to meet different scale requirements.

[0056] The technical effects of this technical solution are:

[0057] 1. Anaerobic digestion belongs to the biochemical reaction system of mutual cooperation of bacterial flora, and the ecological balance system of coexistence, mutual dependence and mutual restraint in the ecological environment; the multi-fermentation environment with continuous entry and exit reduces the interference of local high concentration of harmful substances, helps to separate biogas from the liquid phase, reduces obstacles and improves the conversion rate;

[0058] 2. Through long-term anaerobic digestion and the use of the complementary effects of various organic matter, while absorbing a large amount of organic waste, high-quality compost products and biogas can be obtained, realizing the disposal of waste resources.

[0059] 3. The system is fully self-controlled and can be operated unattended. Through the pressure, temperature, flow and liquid level detection of the system configuration, under the PLC control system, the anaerobic metabolism of anaerobic digestion bacteria is guaranteed to be in the best state, promoting the digestion and decomposition of various substances. Complex organic matter (cellulose, starch, protein, fat) is decomposed into simple water-soluble compounds by hydrolases (extracellular enzymes) (cellulase, cellobiase, amylase, protease, lipase) secreted by fermented bacteria, thus simplifying the treatment of difficult-to-treat bacterial residue waste;

[0060] 4. The whole tank is insulated, and the fermentation heat basically meets the temperature control requirements. The temperature of continuous feeding can be properly adjusted. The operating cost is mainly the power consumption of stirring, which can be basically ignored compared with the value of the biogas produced.

[0061] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A fully mixed anaerobic digestion reactor device suitable for harmless treatment of antibiotic bacterial residues, characterized in that: It comprises a digestion tank (1) sitting on a tank floor (105); A built-in stirrer (107) is installed in the middle of the top of the digester (1) through a stirring motor (106), and a defoaming stirrer (108) is installed on the side of the tank top plate (104) of the digester (1) through a defoaming stirrer installation port (123); a plurality of vertically arranged baffles (103) are installed around the inner wall of the digester (1); a tank bottom emptying port (111), a circulating sludge outlet (115) and a circulating sludge inlet (116) are provided at the bottom of the digester (1); a water inlet pipe (112) and a biogas outlet (121) are installed at the top of the digester (1), and a water inlet branch pipe (1121) connected to the digester (1) is provided on the water inlet pipe (112); a middle water outlet (32) is provided at the middle side of the digester (1); The water inlet pipe (112) is connected to the water inlet pipeline (129) for water supply.

2. The fully mixed anaerobic digestion reactor device adapted for harmless treatment of antibiotic bacterial residue according to claim 1, characterized in that: The middle water outlet (32) is connected to the top of the homogenizing tank (3) through a pipeline, the bottom of the homogenizing tank (3) is connected to the circulating sludge inlet (116) through a pipeline with a first centrifugal pump (31), and the top of the homogenizing tank (3) is also connected to the bottom of the solid-liquid waste configuration tank (2) through a pipeline with a slurry self-priming pump (21).

3. The fully mixed anaerobic digestion reactor device adapted for harmless treatment of antibiotic bacterial residue according to claim 1, characterized in that: The biogas outlet (121) is connected to the biogas tank (5) via a pipeline with a gas flow meter (127); the circulating sludge outlet (115) is connected to the original sewage treatment device (6) via a pipeline with a second centrifugal pump (402).

4. The fully mixed anaerobic digestion reactor device adapted for harmless treatment of antibiotic bacterial residue according to claim 1, characterized in that: An upper liquid outlet (117) is provided on the inner wall of the digestion tank (1) below the defoaming stirrer (108), and the upper liquid outlet (117) is connected to the solid flow sedimentation tank (4) through a pipeline; the bottom of the solid flow sedimentation tank (4) is connected to the raw sewage treatment device (6) through a pipeline with a third centrifugal pump (403); an exhaust pipe (401) is provided on the upper part of the solid flow sedimentation tank (4); the raw sewage treatment device (6) returns the filtered liquid and the sludge after the liquid is discharged to the conditioning tank through the pipeline; The raw sewage treatment device (6) adopts a flap filter tank.

5. The fully mixed anaerobic digestion reactor device adapted for harmless treatment of antibiotic bacterial residues according to claim 1, characterized in that: The digestion tank (1) comprises a cylinder (102) made of carbon steel and an outer tank insulation layer (101) arranged outside the cylinder (102).

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