A pharmaceutical intermediate production wastewater coupled treatment device and method

Abstract

The application discloses a kind of medical intermediate production wastewater coupled processing equipment and method, it is related to wastewater treatment technical field.The equipment of the application includes wastewater tank, processing tank, carbon box and pressure assembly, carbon box is clamped in the top of processing tank, and pressure assembly carries out pressure control to carbon box.Wastewater tank is communicated with processing tank by liquid pipe, liquid pump, and processing tank is internally provided with transfer chamber, bottom chamber, microbial area and drainage chamber, and transfer chamber is configured with component sensing module for detecting the toxicity of wastewater.Processing tank is connected with multiple groups of valve and liquid pump, to realize wastewater delivery, residual wastewater backflow and carbon box quick replacement.The method first introduces wastewater into carbon box detoxification, and after detecting that toxicity reaches standard, it is sent into microbial area degradation, and if it does not reach standard, then replace carbon box and re-detoxification.The application realizes the coupling processing of adsorption detoxification and biodegradation, avoids microbial poisoning, and improves wastewater treatment stability and efficiency.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a coupled treatment device and method for wastewater from pharmaceutical intermediate production. Background Technology

[0002] The production of pharmaceutical intermediates generates high-concentration, highly toxic organic wastewater containing remnants of toxic intermediates that are difficult to degrade, such as benzene rings, heterocyclic compounds, and halogenated hydrocarbons. These wastewaters are extremely biotoxic, and direct discharge of them can cause serious damage to aquatic ecosystems and threaten human health.

[0003] The current mainstream treatment technology for wastewater from pharmaceutical intermediate production is the single-microbial degradation method. This method relies on the metabolic activity of microbial communities to biochemically decompose organic pollutants in the wastewater, and it features relatively low treatment costs and mature technology. However, this technology has two prominent technical problems: First, the high toxicity of the wastewater can rapidly inhibit microbial activity, leading to microbial poisoning and death, which in turn causes the collapse of the entire biochemical system. System restart requires the reculturing of the microbial community, a process that can take 15 to 30 days, severely affecting the continuity of wastewater treatment. Second, after a system collapse, not only is a large amount of manpower and resources required to reculture the microbial community, but it also leads to wastewater accumulation, increasing the environmental risks and treatment costs for enterprises, making it difficult to meet the stable and efficient wastewater treatment needs of the pharmaceutical industry. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0005] This invention provides a coupled treatment device for pharmaceutical intermediate production wastewater, including a wastewater tank, a treatment tank, a charcoal box, and a pressure application component. The charcoal box is mounted on the top of the treatment tank, and the pressure application component is positioned above the treatment tank to control the pressure applied to the charcoal box. The wastewater tank outlet is sequentially connected to a first liquid pipe, a first liquid pump, and a second liquid pipe. The second liquid pipe is sequentially equipped with a first electric valve and an electrically controlled pneumatic valve. The treatment tank has a first nozzle connected to the second liquid pipe. The treatment tank has a transfer chamber, a bottom chamber, a microbial region above the bottom chamber, and a drain chamber above the microbial region. A second nozzle is installed on the top of the transfer chamber. The first and second nozzles are independently connected to the charcoal box. The treatment tank is equipped with a component sensing module, and the sensing probe of the component sensing module is inserted into the transfer chamber. A third liquid pipe is configured between the transfer chamber and the bottom chamber. The third liquid pipe is equipped with a second solenoid valve. A drain pipe is connected to the outside of the drain chamber. The drain pipe is equipped with a third solenoid valve. The third liquid pipe is connected to a suction pipe located upstream of the second solenoid valve. The suction pipe is equipped with a fourth solenoid valve. A branch pipe is installed between the second liquid pipe and the suction pipe. The branch pipe is located between the first solenoid valve and the first nozzle. The branch pipe is equipped with a fifth solenoid valve. The suction pipe is connected to a second liquid pump. The second liquid pump is connected to the wastewater tank through a return pipe.

[0006] Preferably, the top of the treatment tank is provided with a mounting slot, the carbon box is placed in the mounting slot, and a pipe-mounting gap is provided on one side of the treatment tank for installing a second liquid pipe.

[0007] Preferably, the interior of the carbon box is a carbon cavity, and a baffle plate is provided inside the carbon cavity. The bottom of the carbon box has inlet mesh holes distributed on one side of the baffle plate and outlet mesh holes distributed on the other side of the baffle plate. The pore size of the inlet and outlet mesh holes is smaller than the size of the activated carbon particles inside the carbon cavity, or activated carbon bags are inserted into the carbon cavity to prevent activated carbon leakage from the inlet and outlet mesh holes. The first nozzle is inserted into the inlet mesh hole, and the second nozzle is inserted into the outlet mesh hole.

[0008] Preferably, a flow gap is formed between the baffle plate and the top wall of the carbon chamber, and sealing gaskets are provided at the bottom openings of the liquid inlet and outlet mesh holes. Ports communicating with the carbon chamber are opened at both ends of the carbon box, and removable covers are installed at the port positions.

[0009] Preferably, a baffle is provided inside the transfer chamber, with the second nozzle located on one side of the baffle, and a detection area formed on the other side of the baffle, into which a sensor probe is inserted. The bottom outlet of the second nozzle and the horizontal height of the sensor probe are both lower than the highest point of the baffle.

[0010] Preferably, the pressure application assembly includes an upper support, a top plate, a lifter, and a pressure plate. The upper support is fixed to the upper side of the processing tank, the top plate is fixed to the top side of the upper support, the lifter is fixed to the top plate and its output shaft is vertically downward, the pressure plate is fixed to the end of the output shaft of the lifter, the pressure plate is located directly above the charcoal box, and the two sides of the pressure plate are slidably connected to the upper support.

[0011] Preferably, an aeration mechanism is provided at the bottom of the bottom cavity, and a pressure relief valve is provided at the top of the drain cavity.

[0012] Preferably, an air supply device is configured upstream of the aeration mechanism, and the air supply device is connected to the aeration mechanism through an air pipe. The top of the aeration mechanism is exposed at the bottom of the cavity, and multiple air nozzles are arranged in an array on the top of the aeration mechanism.

[0013] This invention provides a coupled treatment method for wastewater from pharmaceutical intermediate production, comprising the following:

[0014] Step 1: Open the first, second, and third electric valves to start the first liquid pump, which will guide the wastewater from the wastewater tank into the charcoal box through the first liquid pipe, the second liquid pipe, and the first nozzle.

[0015] In the second stage, after being treated by the charcoal box, the wastewater enters the transfer chamber of the treatment tank through the second nozzle.

[0016] In the third step, the component sensing module detects the wastewater composition in the transfer chamber through a sensing probe to determine the wastewater's toxicity.

[0017] In step four, if the wastewater toxicity is less than the preset reference value, the wastewater is introduced into the bottom cavity of the treatment tank through the third liquid pipe. The wastewater flows upward through the microbial zone of the treatment tank to complete the biodegradation treatment. The degraded wastewater enters the discharge cavity of the treatment tank and is discharged to the next treatment process through the drain pipe.

[0018] In step five, if the wastewater toxicity is not lower than the preset reference value, close the first, second, and third solenoid valves and the first liquid pump, open the fourth and fifth solenoid valves, and start the second liquid pump. The second liquid pump sucks out the residual wastewater in the charcoal box through the suction pipe, branch pipe, second liquid pipe, first nozzle, and second nozzle, and returns it to the wastewater tank through the return pipe. The second liquid pump stops, the electrically controlled pneumatic valve is opened to release the negative pressure in the pipeline, the pressure application component releases the pressure control on the charcoal box, and after replacing the charcoal box, the pressure application component resets the pressure application. Close the fifth solenoid valve, open the first solenoid valve, and start the first and second liquid pumps to repeat the wastewater detoxification and testing process until the wastewater toxicity is lower than the preset reference value, and the pipeline system status returns to step one.

[0019] Compared with existing technologies, the beneficial effects of this invention are:

[0020] This invention employs a treatment process that couples activated carbon adsorption detoxification with microbial degradation. First, highly toxic substances in the wastewater are adsorbed through a carbon box to reduce the toxicity of the wastewater before it is sent to the microbial area for degradation. This fundamentally avoids the problem of biochemical system collapse caused by the death of microorganisms due to poisoning, ensuring the continuous and stable operation of the wastewater treatment system. It eliminates the need for frequent restarts of the culture of microorganisms and significantly shortens the treatment cycle.

[0021] Meanwhile, this invention achieves rapid replacement of the charcoal box and automatic return of residual wastewater through the cooperation of multiple sets of valves and liquid pumps. Combined with real-time toxicity detection by the component sensing module, it improves the automation level and processing accuracy of the equipment, effectively reduces the overall cost of wastewater treatment, and meets the needs of large-scale treatment of highly toxic organic wastewater from pharmaceutical intermediates. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the device of the present invention.

[0023] Figure 2 for Figure 1 A magnified structural diagram of part A in the middle.

[0024] Figure 3 This is a schematic diagram of the structure of the device of the present invention when the carbon box is replaced.

[0025] Figure 4 for Figure 3 A magnified structural diagram of section B in the middle.

[0026] Wherein: 1-Wastewater tank; 2-First liquid pipe; 3-First liquid pump; 4-Second liquid pipe; 41-Electrically controlled air valve; 5-First electric valve; 6-Charcoal box; 61-Charcoal chamber; 62-Activated carbon; 63-Baffle plate; 64-Flow gap; 65-Inlet mesh; 66-Outlet mesh; 67-Sealing gasket; 68-Port; 69-Cap; 7-Treatment tank; 71-Mounting groove; 72-Pipe loading gap; 73-First nozzle; 74-Transfer chamber; 741-Baffle; 742-Second nozzle; 74 3-Detection area; 75-Bottom cavity; 76-Microbial area; 77-Drainage cavity; 78-Pressure relief valve; 8-Component sensing module; 81-Sensing probe; 9-Upper bracket; 10-Top plate; 11-Lifter; 12-Pressure plate; 13-Third liquid pipe; 14-Second solenoid valve; 15-Aeration mechanism; 16-Air supply equipment; 17-Drain pipe; 18-Third solenoid valve; 19-Suction pipe; 20-Fourth solenoid valve; 21-Branch pipe; 22-Fifth solenoid valve; 23-Second liquid pump; 24-Return pipe. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0028] Example 1: This invention designs a coupled treatment device for wastewater from pharmaceutical intermediate production, with the specific structural configuration as follows:

[0029] like Figure 1 , Figure 3 As shown, wastewater tank 1 is used to store pharmaceutical intermediate production wastewater to be treated. The outlet of wastewater tank 1 is sequentially connected to a first liquid pipe 2, a first liquid pump 3, and a second liquid pipe 4. The first liquid pump 3 provides power for wastewater transport. A first electric valve 5 and an electrically controlled pneumatic valve 41 are sequentially mounted on the second liquid pipe 4. The first electric valve 5 controls the flow of wastewater in the second liquid pipe 4. The electrically controlled pneumatic valve 41 releases negative pressure in the pipeline. Treatment tank 7 is the core container for wastewater treatment. A mounting slot 71 is provided on the top of treatment tank 7, where a charcoal box 6 is placed. A pipe mounting gap 72 is provided on one side of treatment tank 7 for installing the second liquid pipe 4. Treatment tank 7 is equipped with a first nozzle 73 connected to the second liquid pipe 4. The interior of treatment tank 7 includes a transfer chamber 74, a bottom chamber 75, a microbial zone 76, and a drain chamber 77. The microbial zone 76 is located above the bottom chamber 75 and is used to hold microorganisms that degrade organic pollutants. The drain chamber 77 is located above the microbial zone 76. A second nozzle 742 is installed on the top of the transfer chamber 74. The first nozzle 73 and the second nozzle 742 are independently connected to the carbon box 6.

[0030] like Figure 2 , Figure 4As shown, the interior of the carbon box 6 is a carbon cavity 61, filled with activated carbon 62. A baffle 63 is installed within the carbon cavity 61, forming a flow gap 64 between the baffle 63 and the top wall of the carbon cavity 61. The bottom of the carbon box 6 has inlet mesh holes 65 distributed on one side of the baffle 63 and outlet mesh holes 66 distributed on the other side. The pore size of the inlet mesh holes 65 and outlet mesh holes 66 is smaller than the size of the activated carbon 62 particles in the carbon cavity 61, or activated carbon 62 packets are inserted into the carbon cavity 61 to prevent leakage of activated carbon 62 from the inlet mesh holes 65 and outlet mesh holes 66. A first nozzle 73 is inserted into the inlet mesh hole 65. A second nozzle 742 is inserted into the outlet mesh hole 66. Sealing gaskets 67 are provided at the bottom openings of both the inlet mesh hole 65 and outlet mesh hole 66 to ensure a tight seal at the insertion points. Both ends of the charcoal box 6 have port sections 68 that communicate with the charcoal chamber 61. A removable cover 69 is installed at the port section 68 to facilitate the filling and replacement of activated carbon 62.

[0031] like Figure 2 , Figure 4 As shown, the transfer chamber 74 is equipped with a baffle 741, and the second nozzle 742 is located on one side of the baffle 741. The other side of the baffle 741 forms a detection area 743. The treatment tank 7 is equipped with a component sensing module 8, and the sensing probe 81 of the component sensing module 8 is inserted into the detection area 743. The bottom outlet of the second nozzle 742 and the horizontal height of the sensing probe 81 are both lower than the highest point of the baffle 741, ensuring that wastewater fully enters the detection area 743 and improving detection accuracy.

[0032] like Figure 1 , Figure 3 As shown, the pressure application assembly is positioned above the processing tank 7 and controls the pressure on the charcoal box 6. The pressure application assembly includes an upper support 9, a top plate 10, a lifter 11, and a pressure plate 12. The upper support 9 is fixed to the upper side of the processing tank 7, the top plate 10 is fixed to the top side of the upper support 9, the lifter 11 is fixed to the top plate 10 with its output shaft pointing vertically downwards, and the pressure plate 12 is fixed to the end of the output shaft of the lifter 11. The pressure plate 12 is located directly above the charcoal box 6, and its two sides are slidably connected to the upper support 9 to ensure the stability of the pressure plate 12 during lifting.

[0033] like Figure 1 , Figure 3As shown, a third liquid pipe 13 is configured between the transfer chamber 74 and the bottom chamber 75. The third liquid pipe 13 is equipped with a second solenoid valve 14 to control the flow of liquid between the transfer chamber 74 and the bottom chamber 75. A drain pipe 17 is connected to the outside of the drain chamber 77. The drain pipe 17 is equipped with a third solenoid valve 18 to control the discharge of treated wastewater. The third liquid pipe 13 is connected to a suction pipe 19 located upstream of the second solenoid valve 14. The suction pipe 19 is equipped with a fourth solenoid valve 20. A branch pipe 21 is installed between the second liquid pipe 4 and the suction pipe 19. The branch pipe 21 is located between the first solenoid valve 5 and the first nozzle 73, and is equipped with a fifth solenoid valve 22. The suction pipe 19 is connected to a second liquid pump 23. The second liquid pump 23 is connected to the wastewater tank 1 via a return pipe 24. The second liquid pump 23 is used to extract residual wastewater from the carbon box 6 and return it to the wastewater tank 1.

[0034] like Figure 1 As shown, an aeration mechanism 15 is disposed at the bottom of the bottom cavity 75. An air supply device 16 is disposed upstream of the aeration mechanism 15, and the air supply device 16 is connected to the aeration mechanism 15 via an air pipe. The top of the aeration mechanism 15 is exposed at the bottom of the bottom cavity 75. The top of the aeration mechanism 15 is provided with multiple arrayed air nozzles for aeration into the bottom cavity 75, providing sufficient oxygen for microbial degradation. A pressure relief valve 78 is disposed at the top of the drain cavity 77 for releasing excessive pressure in the treatment tank 7.

[0035] Example 2: This invention designs a coupled treatment method for wastewater from pharmaceutical intermediate production, the specific steps of which are as follows:

[0036] (a) Open the first solenoid valve 5, the second solenoid valve 14, and the third solenoid valve 18, and start the first liquid pump 3. The wastewater in the wastewater tank 1 is introduced into the carbon chamber 61 of the carbon box 6 through the first liquid pipe 2, the first liquid pump 3, the second liquid pipe 4, and the first nozzle 73 in sequence. The wastewater is blocked by the turbulence baffle 63 in the carbon chamber 61, and smoothly enters the detection area 743 of the transfer chamber 74 through the flow gap 64 and the second nozzle 742.

[0037] (ii) The component sensing module 8 detects the wastewater components in the detection area 743 of the transfer chamber 74 in real time through the sensing probe 81, and accurately determines the toxicity value of the wastewater.

[0038] If the toxicity of the wastewater is detected to be less than the preset reference value, the wastewater is directly introduced into the bottom cavity 75 through the third liquid pipe 13. The air supply device 16 is started to supply air to the aeration mechanism 15. The aeration mechanism 15 aerates the bottom cavity 75 through the air nozzle. The wastewater flows upward through the microbial area 76. The microorganisms carry out biochemical degradation treatment of the organic pollutants in the wastewater. After the degradation is completed, the wastewater enters the discharge cavity 77 and is finally discharged to the next treatment process through the drain pipe 17.

[0039] If the toxicity of the wastewater is detected to be not lower than the preset reference value, immediately close the first solenoid valve 5, the second solenoid valve 14, the third solenoid valve 18 and the first liquid pump 3, open the fourth solenoid valve 20 and the fifth solenoid valve 22, and start the second liquid pump 23. The second liquid pump 23 is a high-intensity negative pressure pump that sucks out the residual wastewater in the carbon box 6 through the second liquid pipe 4, the first nozzle 73, the suction pipe 19, the transfer chamber 74 and the second nozzle 742. The sucked-out wastewater flows back to the wastewater tank 1 through the return pipe 24. After the suction is completed, the second liquid pump 23 is paused. Then, the electrically controlled air valve 41 is opened to release the negative pressure connection between the carbon box 6 and the first nozzle 73 and the second nozzle 742. The lifter 11 drives the pressure plate 12 to rise, releasing the pressure control of the pressure application component on the carbon box 6. The staff removes the old carbon box 6 and replaces it with a new carbon box 6 filled with new activated carbon 62. The lifter 11 drives the pressure plate 12 to fall, completing the pressure sealing of the new carbon box 6. Then, the second solenoid valve 14 and the fifth solenoid valve 22 are closed, the first solenoid valve 5 is opened, and the first liquid pump 3 and the second liquid pump 23 are started at the same time. The component sensing module 8 continuously detects the wastewater components in the transfer chamber 74 until the wastewater toxicity is detected to be less than the preset reference value. Then, the second solenoid valve 14 is opened, the fourth solenoid valve 20 is closed, the second liquid pump 23 is stopped, and the microbial degradation process of low-toxicity wastewater is restored.

[0040] Repeat steps (i) and (ii) as described above. The charcoal box 6 continuously absorbs toxic substances from the flowing wastewater. The low-toxicity wastewater then passes through the bottom chamber 75, upwards through the microbial zone 76 for biodegradation, and then enters the discharge chamber 77, before being discharged through the drain pipe 17 to the next treatment process.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A coupled treatment device for wastewater from pharmaceutical intermediate production, characterized in that: It includes a wastewater tank (1), a treatment tank (7), a carbon box (6) and a pressure application component. The carbon box (6) is fitted onto the top of the treatment tank (7), and the pressure application component is positioned above the treatment tank (7) and applies pressure to the carbon box (6). The wastewater tank (1) is connected in sequence to the first liquid pipe (2), the first liquid pump (3), and the second liquid pipe (4). The second liquid pipe (4) is equipped with the first electric valve (5) and the electric control air valve (41). The treatment tank (7) is provided with the first nozzle (73) connected to the second liquid pipe (4). The treatment tank (7) is provided with the transfer chamber (74), the bottom chamber (75), the microbial area (76) located above the bottom chamber (75), and the drain chamber (77) located above the microbial area (76). The second nozzle (742) is installed on the top of the transfer chamber (74). The first nozzle (73) and the second nozzle (742) are independently connected to the carbon box (6). The treatment tank (7) is equipped with the component sensing module (8). The sensing probe (81) of the component sensing module (8) is inserted into the transfer chamber (74). A third liquid pipe (13) is configured between the transfer chamber (74) and the bottom chamber (75). The third liquid pipe (13) is configured with a second electric valve (14). The drain chamber (77) is connected to a drain pipe (17). The drain pipe (17) is configured with a third electric valve (18). The third liquid pipe (13) is connected to a suction pipe (19) located upstream of the second electric valve (14). The suction pipe (19) is configured with a fourth electric valve (20). A branch pipe (21) is installed between the second liquid pipe (4) and the suction pipe (19). The branch pipe (21) is located between the first electric valve (5) and the first nozzle (73). The branch pipe (21) is configured with a fifth electric valve (22). The suction pipe (19) is connected to a second liquid pump (23). The second liquid pump (23) is connected to the wastewater tank (1) through a return pipe (24). The top of the treatment tank (7) is provided with a mounting slot (71), and the carbon box (6) is placed in the mounting slot (71). The side of the treatment tank (7) is also provided with a pipe-mounting gap (72) for installing the second liquid pipe (4). The carbon box (6) has a carbon cavity (61) inside, and a baffle plate (63) is provided inside the carbon cavity (61). The bottom of the carbon box (6) is provided with an inlet mesh (65) distributed on one side of the baffle plate (63) and an outlet mesh (66) distributed on the other side of the baffle plate (63). The first nozzle (73) is inserted into the inlet mesh (65), and the second nozzle (742) is inserted into the outlet mesh (66). A flow gap (64) is formed between the baffle plate (63) and the top wall of the carbon chamber (61), and sealing gaskets (67) are provided at the bottom openings of the liquid inlet mesh (65) and the liquid outlet mesh (66). The charcoal box (6) has port portions (68) on both sides that communicate with the charcoal chamber (61), and a removable cover (69) is installed at the port portion (68). The transfer chamber (74) is provided with a baffle (741), the second nozzle (742) is located on one side of the baffle (741), and a detection area (743) is formed on the other side of the baffle (741). The sensor probe (81) is inserted into the detection area (743). The bottom outlet of the second nozzle (742) and the horizontal height of the sensor probe (81) are both lower than the horizontal position of the highest point of the baffle (741). The pressure application assembly includes an upper support (9), a top plate (10), a lifter (11), and a pressure plate (12). The upper support (9) is fixed to the upper side of the processing tank (7). The top plate (10) is fixed to the top side of the upper support (9). The lifter (11) is fixed to the top plate (10) and its output shaft is vertically downward. The pressure plate (12) is fixed to the end of the output shaft of the lifter (11). The pressure plate (12) is located directly above the carbon box (6). The two sides of the pressure plate (12) are slidably connected to the upper support (9).

2. The coupled treatment equipment for pharmaceutical intermediate production wastewater according to claim 1, characterized in that: An aeration mechanism (15) is provided at the bottom of the bottom cavity (75), and a pressure relief valve (78) is provided at the top of the drain cavity (77).

3. The coupled treatment equipment for pharmaceutical intermediate production wastewater according to claim 2, characterized in that: An air supply device (16) is configured upstream of the aeration mechanism (15). The air supply device (16) is connected to the aeration mechanism (15) through an air pipe. The top of the aeration mechanism (15) is exposed to the bottom of the bottom cavity (75). The top of the aeration mechanism (15) is provided with multiple arrayed air nozzles.

4. A coupled treatment method for pharmaceutical intermediate production wastewater, applied to the coupled treatment equipment for pharmaceutical intermediate production wastewater according to any one of claims 1 to 3, characterized in that, Includes the following: Step 1: Open the first electric valve (5), the second electric valve (14), and the third electric valve (18), start the first liquid pump (3), and introduce the wastewater in the wastewater tank (1) into the carbon box (6) through the first liquid pipe (2), the second liquid pipe (4), and the first nozzle (73); In the second stage, after the wastewater is treated by the carbon box (6), it enters the transfer chamber (74) of the treatment tank (7) through the second nozzle (742). In the third step, the component sensing module (8) detects the wastewater components in the transfer chamber (74) through the sensing probe (81) to determine the toxicity of the wastewater; Step 4: If the toxicity of the wastewater is less than the preset reference value, the wastewater is introduced into the bottom cavity (75) of the treatment tank (7) through the third liquid pipe (13). Wastewater flows upward through the microbial zone (76) of the treatment tank (7) to complete the biodegradation treatment; The degraded wastewater enters the discharge chamber (77) of the treatment tank (7) and is discharged to the next treatment process through the drain pipe (17); Step 5: If the toxicity of the wastewater is not lower than the preset reference value, close the first electric valve (5), the second electric valve (14), the third electric valve (18) and the first liquid pump (3), open the fourth electric valve (20) and the fifth electric valve (22), and start the second liquid pump (23). The second liquid pump (23) sucks out the residual wastewater in the carbon box (6) through the suction pipe (19), branch pipe (21), second liquid pipe (4), first nozzle (73), and second nozzle (742), and returns it to the wastewater tank (1) through the return pipe (24). The second liquid pump (23) stops, the electric control air valve (41) is opened to release the negative pressure in the pipeline, the pressure application component releases the pressure control on the carbon box (6), and after replacing the new carbon box (6), the pressure application component resets to apply pressure. Close the fifth electric valve (22), open the first electric valve (5), start the first liquid pump (3) and the second liquid pump (23), and repeat the wastewater detoxification and detection process until the wastewater toxicity is less than the preset reference value, and the pipeline system status is restored to stage one.

Images