CN115367970A - Breeding wastewater anaerobic treatment system convenient to manage and method thereof - Google Patents

Abstract

The invention discloses an aquaculture wastewater anaerobic treatment system and method thereof which are easy to manage. The system includes a first filter tank, a reaction tank and a second filter tank. A water inlet pipe is arranged on one side of the first filter tank, and the first The other side of the filter tank is connected to the reaction tank through the first drain pipe, the first stirring rod is arranged in the reaction tank, the push rod passing through the reaction tank and the second filter tank is arranged in the reaction tank, and the reaction tank is connected to the second filter tank through the second drain pipe. The second filter tank is connected, and a second stirring rod is arranged vertically in the second filter tank. In the present invention, by making the first stirring rod swing back and forth in the reaction tank, the stirring range is increased, so that the aquaculture wastewater can be fully mixed with the activated sludge; Extrude intermittently, so that the pressing rod drives the rack, and the second stirring rod performs forward and reverse motion.

Description

A management-friendly aquaculture wastewater anaerobic treatment system and method thereof

technical field

The invention relates to the technical field of aquaculture wastewater treatment, in particular to a management-friendly anaerobic treatment system and method for aquaculture wastewater.

Background technique

Since the treatment of aquaculture sewage belongs to the "three high" sewage with high organic matter concentration, high N, P content and high number of harmful microorganisms, anaerobic technology has become an indispensable key technology in the treatment of manure in livestock and poultry farms. In recent years, anaerobic Digestion, that is, biogas fermentation technology, has been widely used in farm waste treatment. For such high-concentration organic sewage in farms, anaerobic digestion technology can effectively remove a large amount of soluble organic matter, COD The removal rate reaches 85% to 90%, and it can kill infectious bacteria, which is beneficial to the epidemic prevention of farms. If the aerobic process is directly used to treat the aquaculture sewage after solid-liquid separation, although the one-time investment can save 20%, but due to It consumes a lot of power, and the consumption of electricity and running water is 10 times that of anaerobic treatment, so the long-term operating costs will bring a heavy economic burden to the farm, and the aerobic method is generally only suitable for medium and low levels due to the limitation of oxygen supply. The treatment of concentrated organic wastewater, and the anaerobic method is suitable for both high-concentration organic wastewater and medium- and low-concentration organic wastewater. At the same time, the anaerobic method can degrade some organic substances that are difficult to degrade by aerobic methods, such as solid organic substances, containing colored pollutants and certain nitrogenous dyes.

In the prior art, only one stirring rod is often installed in the sewage treatment tank, resulting in a too small stirring range and low anaerobic reaction efficiency, and the water body is directly discharged for use after the anaerobic reaction treatment, and the directly discharged water body is often It also contains some particulate pollutants such as silt residue, so there is a need for an anaerobic treatment system and method for aquaculture wastewater that is easy to manage.

Contents of the invention

In order to solve the above technical problems, the present invention provides an anaerobic treatment system and method for aquaculture wastewater that is easy to manage.

The technical solution of the present invention is: an aquaculture wastewater anaerobic treatment system that is easy to manage, including a first filter tank for primary filtration of wastewater, a reaction tank for wastewater anaerobic reaction and a second filter tank for secondary filtration of wastewater filter pool;

One side of the first filter tank is provided with a water inlet pipe, and the other side of the first filter tank is connected to the reaction tank through the first drain pipe, the first stirring rod is arranged in the reaction tank, and the top surface of the reaction tank A chute is provided, one end of the first stirring rod passes through the chute and is connected with the output shaft of the drive mechanism on the top surface of the reaction tank, and the first stirring rod located in the reaction tank is sequentially arranged from top to bottom A fixed block, a worm, and a first stirring blade are sleeved, the fixed block is rotatably connected to the first stirring rod, and the worm, the first stirring blade is fixedly connected to the first stirring rod;

One side of the fixed block is provided with a first connecting rod fixedly connected to it, and one end of the first connecting rod is rotationally connected with one end of the second connecting rod fixed on the inner wall of the reaction pool through the first fixing rod, and the first connecting rod The other end of the connecting rod is fixedly provided with a worm gear for meshing with the worm, and the other end of the first connecting rod is rotatably connected to the central shaft of the worm gear, and the central shaft of the worm gear is provided with a third connecting rod, and the third connecting rod One end is fixedly connected with the central shaft of the worm wheel, the other end of the third connecting rod is provided with a fourth connecting rod, and one end of the fourth connecting rod is rotationally connected with the other end of the third connecting rod, and the other end of the fourth connecting rod passes through the second fixed rod It is rotationally connected with the other end of the second connecting rod, and the second connecting rod is inclined to one side of the fixed block;

The reaction tank corresponding to the position of the fixed block is provided with a push rod along the horizontal direction, and one end of the push rod is provided with a push plate matched with the fixed block, and the push plate is connected to the inner wall of the reaction tank through at least one set of spring rods;

The reaction tank is connected to the second filter tank through a second drain pipe, and a second stirring rod is arranged vertically in the second filter tank, and the upper end of the second stirring rod passes through the top of the second filter tank. There is also a limit block on the surface, and a gear is fixedly set on the second stirring rod in the second filter tank, and a gear rack is provided on one side of the gear, and the other end of the push rod penetrates the reaction tank, the second The filter pool is fixedly connected with the rack;

The lower end of the second stirring rod is provided with a second stirring blade, the second filter tank is provided with a medicament tank for adding medicine to the second filter tank, and the second filter tank is provided with an outlet pipe for water to flow out, The outlet pipe is provided with a second valve. Through the above settings, the first stirring rod can be reciprocated in the reaction tank, which increases the stirring range, enables the aquaculture wastewater to be fully mixed with the activated sludge, improves the efficiency of the anaerobic reaction, and the reciprocating swing of the first stirring rod It can also drive the second stirring rod set in the second filter tank to perform forward and reverse rotation. Through the above settings, the water body after the anaerobic reaction can be filtered for the second time, and the residual large particle pollutants in the water body can be filtered before the water body is filtered. Discharge, improve the purification rate of water body.

Further, the opening on the top surface of the first filter tank is provided with a cover plate that slides and engages with the first filter tank, and multiple sets of filter screens are arranged in the first filter tank, and the multiple sets of filter screens are arranged in sequence from right to left. The diameters of the holes are arranged in descending order. Through the above settings, the cleaning process of the first filter pool can be made more convenient, and the filter screens with different mesh diameters can filter the waste water in multiple levels, avoiding the problem of blocking the first drain pipe due to the presence of large particles of pollutants in the waste water .

Further, an air collection chamber is provided above the driving mechanism, and the bottom surface of the air collection chamber is provided with a first exhaust pipe for introducing the biogas discharged from the chute into the air collection chamber. The inner diameter of the first exhaust pipe is ≥The length of the chute, the gas collection chamber is provided with a second exhaust pipe for discharging biogas, and the second exhaust pipe is provided with a third valve. Through the above arrangement, the gas generated in the anaerobic reaction can be collected for secondary utilization, which improves the secondary utilization rate of resources, avoids the mixing of gas and air in the gas collection chamber, and ensures the purity of the gas in the gas collection chamber.

Further, an adjustment pool is provided below the reaction pool, one side of the adjustment pool is connected to the reaction pool through a third drain pipe, and the other side of the adjustment pool is connected to the reaction pool through a water pump and a pipeline. Through the above arrangement, the anaerobic influent can be refluxed, so that the pH value of the wastewater can be kept stable, and the efficiency of the anaerobic reaction of the wastewater can be improved.

Further, the push rod is in sliding and sealing connection with the reaction tank and the second filter tank. Through the above arrangement, the waste water or the gas generated by the anaerobic reaction overflow due to gaps in the connection, thereby avoiding the waste of resources.

Further, the driving mechanism is a driving motor, the driving motor is rotatably connected to the support rod arranged on the upper surface of the reaction pool, and the driving motor is connected to the controller arranged on the first exhaust pipe through wires. Through the above setting, the stirring efficiency of the first stirring rod can be improved, thereby improving the efficiency of the anaerobic reaction of the waste water. By setting the controller, the motor can be operated more conveniently.

Further, the reaction tank is provided with a first sewage discharge pipe for cleaning sludge, a first valve is provided on the first sewage discharge pipe, a second sewage discharge pipe is provided at the bottom of the second filter tank, and the second sewage discharge pipe is The sewage pipe is provided with a third valve. Through the above settings, the sludge discharge process of the reaction tank can be made more convenient, and the large-grained sediment in the second filter tank can be discharged more conveniently, avoiding the low efficiency of the secondary filtration caused by the excessive accumulation of sediment in the second filter tank The problem.

Further, a baffle plate for controlling water discharge is slid on the inner wall of the connection between the reaction pool and the second filter pool, and a pulley is provided on the inner wall of the second filter pool above the baffle plate, and the baffle plate The upper end of the board is fixedly connected with the baffle plate through a rope passing through the pulley, and the two sides of the baffle plate are provided with limiting bars for sliding the baffle plate up and down. Through the above arrangement, the first stirring rod can control the baffle plate during the swinging process, so that the water body can intermittently flow into the second filter tank and the adjustment tank, improving the efficiency of secondary filtration and backflow.

Further, the method for anaerobic treatment of wastewater by the aquaculture wastewater anaerobic treatment system includes the following steps:

S1. Inject the breeding wastewater from the water inlet pipe into the first filter tank;

S2. The aquaculture wastewater flows into the reaction tank through the first drainage pipe after the initial filtration of the first filter tank for anaerobic reaction;

S3. Part of the water in the reaction tank flows into the regulating tank through the third drainage pipe for reflux, and the water after the backflow is reinjected into the reaction tank through the water pump, and the other part of the water flows into the second filter tank through the second drain pipe for secondary filtration ;

S4. Collect and utilize the gas generated by anaerobic treatment of wastewater in the reaction tank;

S5, adding a flocculant to the second filter tank through the agent tank to perform secondary filtration on the water body in the second filter tank;

S6. The filtered water is discharged from the second filter pool through the water outlet pipe.

Through the above method, the wastewater can be filtered for the first time before the aquaculture wastewater is anaerobically treated, and the reflux process can be added during the anaerobic reaction to keep the pH value of the water in the reaction tank stable, which improves the efficiency of the anaerobic reaction and can reduce the anaerobic reaction. The treated water body is subjected to secondary filtration, which improves the purification degree of the waste water and facilitates subsequent secondary utilization of the treated water body.

The beneficial effects of the present invention are:

(1) The aquaculture wastewater anaerobic treatment system of the present invention, by making the first stirring rod swing back and forth in the reaction tank, the stirring range is increased, the aquaculture wastewater can be fully mixed with the activated sludge, and the efficiency of the anaerobic reaction is improved.

(2) The aquaculture wastewater anaerobic treatment system of the present invention uses the reciprocating swing of the first stirring rod to make the first stirring rod intermittently squeeze the pressure rod, so that the pressure rod drives the rack, and the second rod is driven by the rack. The stirring rod moves forward and backward, which improves the mixing efficiency of the secondary filtered water and the medicament, so that the second filter pool can filter the water more fully.

(3) The aquaculture wastewater anaerobic treatment system of the present invention drives the baffle to reciprocate up and down by the reciprocating motion of the push plate, so that the water body can intermittently flow into the second filter tank and the regulating tank, thereby reducing secondary filtration and backflow The pressure improves the efficiency of secondary filtration and backflow.

Description of drawings

Fig. 1 is the overall structural representation of wastewater anaerobic treatment system of the present invention;

Fig. 2 is the sectional view of the waste water anaerobic treatment system of embodiment 1 of the present invention;

Fig. 3 is the partial sectional view of the waste water anaerobic treatment system of embodiment 1 of the present invention;

Fig. 4 is the partial structural representation of wastewater anaerobic treatment system of the present invention;

Fig. 5 is the partial structural representation of wastewater anaerobic treatment system of the present invention;

Fig. 6 is the sectional view of the waste water anaerobic treatment system of embodiment 2 of the present invention;

Fig. 7 is the partial structure schematic diagram of the waste water anaerobic treatment system of embodiment 2 of the present invention;

Among them, 1-first filter tank, 11-water inlet pipe, 12-first drain pipe, 13-cover plate, 14-filter screen, 2-reaction tank, 21-first stirring rod, 22-driving mechanism, 23- Fixed block, 231-the first connecting rod, 232-the first fixing rod, 233-the second connecting rod, 234-worm gear, 235-the third connecting rod, 236-the fourth connecting rod, 237-the second fixing rod, 24 -worm, 25-first mixing blade, 26-push rod, 261-push plate, 262-spring rod, 263-rack, 27-baffle plate, 28-pulley, 29-first sewage pipe, 3-second Filter tank, 31-second drain pipe, 32-second stirring rod, 33-gear, 34-second stirring blade, 35-medicine tank, 36-outlet pipe, 37-second sewage pipe, 4-gas collection chamber , 41-the first exhaust pipe, 42-the second exhaust pipe, 5-regulating tank, 51-the third drain pipe, 52-water pump.

Detailed ways

The present invention will be further described in detail below in conjunction with specific embodiments, so as to better reflect the advantages of the present invention.

Example 1

As shown in Figures 1 and 2, an aquaculture wastewater anaerobic treatment system that is easy to manage includes a first filter pool 1 for primary filtration of wastewater, a reaction pool 2 for anaerobic reaction of wastewater and a secondary filter for wastewater The second filter tank 3, the top opening of the first filter tank 1 is provided with a cover plate 13 that slides and engages with the first filter tank 1, the first filter tank 1 is provided with multiple sets of filter screens 14, and the multiple sets of filter screens 14 The filter screen 14 is arranged according to the diameter of the mesh from large to small from right to left;

As shown in Figures 2, 3, and 4, the right side of the first filter tank 1 is provided with a water inlet pipe 11, and the left side of the first filter tank 1 is connected to the reaction tank 2 through the first drain pipe 12, and the reaction tank 1 is connected to the reaction tank 2 on the left side. The pool 2 is provided with a first stirring rod 21, the top surface of the reaction tank 2 is provided with a chute, and the upper end of the first stirring rod 21 passes through the chute and is connected with the driving mechanism located on the top surface of the reaction tank 2. 22 connected to the output shaft, the drive mechanism 22 is a drive motor, the drive motor is a commercially available motor, the drive motor is rotatably connected to the support rod located on the upper surface of the reaction pool 2, and the drive mechanism 22 is provided with Gas collection chamber 4, the bottom surface of said gas collection chamber 4 is provided with a first exhaust pipe 41 for introducing the biogas discharged from the chute into the gas collection chamber 4, and the inner diameter of the first exhaust pipe 41 is equal to that of the chute The length of the drive motor is connected with the controller on the first exhaust pipe 41 through wires, and the gas collection chamber 4 is provided with a second exhaust pipe 42 for discharging biogas, and the second exhaust pipe 42 is provided with a third valve, the reaction tank 2 is provided with a first sewage pipe 29 for cleaning sludge, the first sewage pipe 29 is provided with a first valve, and the first stirring rod in the reaction pool 2 21 is set with a fixed block 23, a worm 24, and a first stirring blade 25 in turn from top to bottom. The first stirring rod 21 is fixedly connected;

One side of the fixed block 23 is provided with a first connecting rod 231 fixedly connected thereto, and one end of the first connecting rod 231 is rotationally connected to one end of the second connecting rod 233 fixed on the inner wall of the reaction pool 2 through the first fixing rod 232 , and the other end of the first connecting rod 231 is fixedly provided with a worm wheel 234 for engaging with the worm 24 for transmission, and the other end of the first connecting rod 231 is rotationally connected with the central axis of the worm wheel 234, and the central axis of the worm wheel 234 is set There is a third connecting rod 235, and one end of the third connecting rod 235 is fixedly connected to the central axis of the worm wheel 234, the other end of the third connecting rod 235 is provided with a fourth connecting rod 236, and one end of the fourth connecting rod 236 is connected to the first The other end of the three connecting rods 235 is rotationally connected, and the other end of the fourth connecting rod 236 is rotationally connected with the other end of the second connecting rod 233 through the second fixed rod 237, and the second connecting rod 233 faces the fixed block 23 side and the vertical direction Set at a 30° angle;

As shown in Figures 2 and 5, a push rod 26 is provided along the horizontal direction in the reaction tank 2 corresponding to the position of the fixed block 23, and the right end of the push rod 26 is provided with a push plate 261 that cooperates with the fixed block 23. 261 is connected to the inner wall of the reaction pool 2 through two sets of spring rods 262;

The bottom of the reaction pool 2 is provided with a regulating pool 5, the left side of the regulating pool 5 is connected with the reaction pool 2 through a third drain pipe 51, and the right side of the regulating pool 5 is connected with the reaction pool 2 through a water pump 52 and a pipeline;

The reaction tank 2 is connected to the second filter tank 3 through a second drain pipe 31, and a second stirring rod 32 is vertically arranged in the second filter tank 3, and the upper end of the second stirring rod 32 runs through The top surface of the second filter tank 3 is also provided with a limit block, and a gear 33 is fixedly set on the second stirring rod 32 in the second filter tank 3, and the gear 33 is fixed to the second stirring rod by two sets of fixing rings. On the rod 32, one side of the gear 33 is provided with a toothed rack 263 for meshing transmission, and the left end of the push rod 26 runs through the reaction pool 2 and the second filter pool 3 and is fixedly connected with the rack 263; 26 is in sliding and sealed connection with the reaction tank 2 and the second filter tank 3;

The lower end of the second stirring rod 32 is provided with a second stirring blade 34, the second filter tank 3 is provided with a medicine tank 35 for adding medicine to the second filter tank 3, and the second filter tank 3 is provided with a medicament tank 35. There is an outlet pipe 36 for water to flow out, the outlet pipe 36 is provided with a second valve, the bottom of the second filter tank 3 is provided with a second sewage pipe 37, and the second sewage pipe 37 is provided with a third valve;

The method for anaerobic treatment of wastewater by using the above-mentioned aquaculture wastewater anaerobic treatment system comprises the following steps:

S1. Inject the breeding wastewater from the water inlet pipe 11 into the first filter tank 1;

S2, the aquaculture wastewater flows into the reaction tank 2 through the first drainage pipe 12 after the initial filtration of the first filter tank 1 for anaerobic reaction;

S3. Part of the water in the reaction tank 2 flows into the regulating tank 5 through the third drain pipe 51 for backflow, and the water after the backflow is reinjected into the reaction tank 2 through the water pump 52, and another part of the water flows into the adjustment tank 5 through the second drain pipe 31. Secondary filtration is carried out in the second filter pool 3;

S4, the gas produced by the anaerobic treatment of wastewater in the reaction tank 2 enters the gas collection chamber 4 through the first exhaust pipe 41 for collection, and after a period of time, the second exhaust pipe 42 is opened to collect and utilize the gas;

S5, adding flocculant to the second filter tank 3 through the agent tank 35 to perform secondary filtration on the water body in the second filter tank 3;

S6. The filtered water is discharged from the second filter pool 3 through the water outlet pipe 36 .

The method of using the above aquaculture wastewater anaerobic treatment system:

The aquaculture wastewater is injected into the first filter tank 1 from the water inlet pipe 11, and the wastewater enters the reaction tank 2 through the first drain pipe 12 after passing through the three-layer filter screen 14;

Turn on the switch located on the first exhaust pipe 41 to start the driving mechanism 22, and the driving mechanism 22 drives the first stirring rod 21 to rotate, and the worm screw 24 and the first stirring blade 25 on the first stirring rod 21 are simultaneously Rotate, the worm 24 drives the worm wheel 234 to rotate, the worm wheel 234 drives the fourth connecting rod 236 to swing up and down through the third connecting rod 235 fixedly connected with its central axis, when the fourth connecting rod 236 swings upwards, the first stirring rod 21 is The fourth connecting rod 263 drives to swing to the right. When the fourth connecting rod 236 swings downward, the first stirring rod 21 is driven to swing to the left by the fourth connecting rod 263. When the first stirring rod 21 swings to the left, the first stirring rod 21 swings to the left. The stirring rod 21 presses the push plate 261 so that the push plate 261 drives the push rod 26 to move to the left, and the rack 263 located at the left end of the push rod 26 moves to the left at the same time, and the rack 263 drives the gear 33 to rotate forward. The second stirring rod 32 rotates forward at the same time. When the first stirring rod 21 leaves the push plate 261 and moves to the right, the push plate 261 drives the push rod 26 to move to the right under the action of the spring rod 262, and the tooth bar 263 moves to the right simultaneously. The gear 33 is driven to reverse, and the second stirring rod 32 is driven by the gear 33 to reverse simultaneously;

Part of the water body undergoing anaerobic treatment flows into the regulating tank 5 through the third drain pipe 51 for backflow, and the backflowed water body is reinjected into the reaction tank 2 through the water pump 52, and another part of the water body flows into the second water body through the second drain pipe 31. Secondary filtration is carried out in the filter tank 3. After the secondary filtration of the water body, the second valve on the outlet pipe 36 is opened to recycle the water body. The gas generated during the anaerobic treatment of the water body in the reaction tank 2 passes through The chute enters into the gas collection chamber 4 along the first exhaust pipe 41 for collection. After the gas in the gas collection chamber 4 is collected for a period of time, the third valve located on the second exhaust pipe 42 is opened to collect the gas. Collect and reuse.

Example 2

This embodiment is basically the same as Embodiment 1, the difference is that, as shown in Figures 6 and 7, the inner wall of the connection between the reaction pool 2 and the second filter pool 3 is slidingly provided with a valve for controlling the discharge of water. A baffle 27, a pulley 28 is arranged on the inner wall of the second filter tank 3 above the baffle 27, and the upper end of the baffle 27 is fixedly connected with the baffle 27 by a rope passing through the pulley 28, the Limiting strips are arranged on both sides of the baffle plate 27 .

The method of using the above aquaculture wastewater anaerobic treatment system: it is basically the same as that of Example 1, the difference is that, during the process of the push plate 261 moving to the left, the baffle 27 moves downward under the action of gravity to block the water body Enter the second filter tank 3 and the adjustment tank 5, pull the rope during the leftward movement of the push plate 261 to move the baffle plate 27 upwards so that the water can flow into the second filter tank 3 and the adjustment tank 5.

Claims (9)

1. a culture wastewater anaerobic treatment system that is easy to manage is characterized in that, comprises the first filter pond (1) that is used to filter wastewater for the first time, the reaction pond (2) that is used for wastewater anaerobic reaction and is used for secondary A second filter tank (3) for filtering waste water; One side of the first filter tank (1) is provided with a water inlet pipe (11), and the other side of the first filter tank (1) is connected to the reaction tank (2) through a first drain pipe (12). A first stirring rod (21) is provided in the reaction tank (2), and a chute is provided on the top surface of the reaction tank (2), and one end of the first stirring rod (21) passes through the chute and is arranged on the The output shaft of the driving mechanism (22) on the top surface of the reaction tank (2) is connected, and the first stirring rod (21) in the reaction tank (2) is sleeved with a fixed block (23), a worm screw from top to bottom in sequence. (24), the first stirring blade (25), the fixed block (23) is rotationally connected with the first stirring rod (21), the worm (24), the first stirring blade (25) and the first stirring Rod (21) is fixedly connected; One side of the fixed block (23) is provided with a first connecting rod (231) fixedly connected to it, and one end of the first connecting rod (231) is fixed to the reaction pool (2) through the first fixing rod (232). One end of the second connecting rod (233) of the inner wall is rotationally connected, and the other end of the first connecting rod (231) is fixedly provided with a worm wheel (234) for meshing with the worm (24), and the first connecting rod ( 231) The other end is rotationally connected with the central axis of the worm wheel (234), the central axis of the worm wheel (234) is provided with a third connecting rod (235), and one end of the third connecting rod (235) is fixed to the central axis of the worm wheel (234) connected, the other end of the third connecting rod (235) is provided with a fourth connecting rod (236), and one end of the fourth connecting rod (236) is rotationally connected with the other end of the third connecting rod (235), and the fourth connecting rod ( 236) The other end is rotationally connected with the other end of the second connecting rod (233) through the second fixed rod (237), and the second connecting rod (233) is inclined to the fixed block (23) side; In the reaction pool (2) corresponding to the position of the fixed block (23), a push rod (26) is provided along the horizontal direction, and one end of the push rod (26) is provided with a push plate (261) matched with the fixed block (23), The push plate (261) is connected to the inner wall of the reaction pool (2) through at least one set of spring rods (262); The reaction tank (2) is connected with the second filter tank (3) through the second drain pipe (31), and the second stirring rod (32) is arranged vertically in the second filter tank (3) , the upper end of the second stirring rod (32) runs through the top surface of the second filter tank (3) and is provided with a limit block, which is fixedly sleeved on the second stirring rod (32) in the second filter tank (3) There is a gear (33), one side of the gear (33) is provided with a rack (263) for meshing transmission, the other end of the push rod (26) runs through the reaction tank (2), the second filter tank (3) and Fixedly connected with the rack (263); The lower end of the second stirring rod (32) is provided with a second stirring blade (34), and the second filter tank (3) is provided with a medicament tank (35) for adding medicament to the second filter tank (3) , and the second filter pool (3) is provided with an outlet pipe (36) for water outflow, and the outlet pipe (36) is provided with a second valve. 2. An aquaculture wastewater anaerobic treatment system that is easy to manage according to claim 1, characterized in that, the opening on the top surface of the first filter tank (1) is provided with a sliding clamping joint with the first filter tank (1). The cover plate (13), the first filter tank (1) is provided with multiple sets of filter screens (14), and the multiple sets of filter screens (14) are arranged in descending order according to the diameter of the mesh from right to left. 3. A kind of aquaculture wastewater anaerobic treatment system that is easy to manage according to claim 1, characterized in that, an air collection chamber (4) is provided above the driving mechanism (22), and the bottom surface of the air collection chamber (4) There is a first exhaust pipe (41) for introducing the biogas discharged from the chute into the gas collection chamber (4), the inner diameter of the first exhaust pipe (41) is ≥ the length of the chute, and the collection The air chamber (4) is provided with a second exhaust pipe (42) for discharging biogas, and the second exhaust pipe (42) is provided with a third valve. 4. A kind of aquaculture wastewater anaerobic treatment system that is easy to manage according to claim 1, characterized in that, a regulating pond (5) is provided below the reaction pond (2), and one side of the regulating pond (5) passes through The third drainage pipe (51) is connected with the reaction tank (2), and the other side of the regulating tank (5) is connected with the reaction tank (2) through a water pump (52) and a pipeline. 5. A kind of aquaculture wastewater anaerobic treatment system that is easy to manage according to claim 1, is characterized in that, described push rod (26) and described reaction tank (2), described second filter tank (3) all Slip seal connection. 6. A kind of aquaculture wastewater anaerobic treatment system that is easy to manage according to claim 1, characterized in that, the drive mechanism (22) is a drive motor, and the drive motor is connected to the upper surface of the reaction pool (2). The supporting rod is connected in rotation, and the driving motor is connected with a controller arranged on the first exhaust pipe (41) through wires. 7. A kind of aquaculture wastewater anaerobic treatment system that is easy to manage according to claim 1, is characterized in that, described reaction tank (2) is provided with the first blowdown pipe (29) that is used for cleaning sludge, and described first The sewage pipe (29) is provided with a first valve, the bottom of the second filter tank (3) is provided with a second sewage pipe (37), and the second sewage pipe (37) is provided with a third valve. 8. A kind of aquaculture wastewater anaerobic treatment system that is easy to manage according to claim 1, characterized in that, the inner wall of the connection between the reaction pool (2) and the second filter pool (3) is slidably provided for The baffle plate (27) for controlling the discharge of water flow is provided with a pulley (28) on the inner wall of the second filter pool (3) above the baffle plate (27), and the upper end of the baffle plate (27) passes through the pulley The rope of (28) is fixedly connected with the baffle plate (27), and the two sides of the baffle plate (27) are provided with limit bars for making the baffle plate (27) slide up and down. 9. Utilize the method for anaerobic treatment of waste water by the aquaculture waste water anaerobic treatment system described in any one of claims 1-8, it is characterized in that, comprises the following steps: S1. Inject the breeding wastewater from the water inlet pipe (11) into the first filter tank (1); S2, the aquaculture wastewater flows into the reaction tank (2) through the first drainage pipe (12) after the initial filtration of the first filter tank (1) to carry out anaerobic reaction; S3. Part of the water body in the reaction tank (2) flows into the regulating tank (5) through the third drain pipe (51) for backflow, and the water body after backflow is re-injected into the reaction tank (2) through the water pump (52), and another Part of the water flows into the second filter tank (3) through the second drainage pipe (31) for secondary filtration; S4, collecting and utilizing the gas generated by the anaerobic treatment of the wastewater in the reaction tank (2); S5, adding flocculant to the second filter tank (3) through the agent tank (35) to perform secondary filtration on the water body in the second filter tank (3); S6. The filtered water is discharged from the second filter pool (3) through the water outlet pipe (36).

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