Sewage treatment device and method

Abstract

The invention discloses a sewage treatment device and method, and relates to the technical field of sewage treatment.The sewage treatment device is characterized in that the top of a reactor is communicated with a water inlet pipe, the bottom of the reactor is communicated with a water outlet pipe, and sewage enters the reactor through the water inlet pipe and is discharged through the water outlet pipe; manganese oxidizing bacteria and biological manganese oxide are loaded in the granular active carbon layer; a plurality of K3 fillers are placed in the reactor and located above the granular activated carbon layer, and activated sludge and manganese oxidizing bacteria are enriched in the K3 fillers. The method has the advantages that efficient removal of organic micropollutants is realized through a multi-mechanism synergistic effect, and triple mechanisms of activated carbon adsorption, microbial degradation and biological manganese oxide oxidation are innovatively and organically combined, so that an efficient pollutant synergistic removal system is constructed; organic micropollutants in sewage can be effectively removed, intermediate products can be mineralized, and secondary pollution is avoided.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and specifically to a wastewater treatment device and method. Background Technology

[0002] Organic micropollutants (OMPs) are an emerging class of environmental pollutants that have garnered significant attention in recent years due to their widespread presence in aquatic environments and their potential ecological risks. These pollutants primarily include pharmaceutically active compounds, personal care products, endocrine disruptors, polycyclic aromatic hydrocarbons (PAHs), and various industrial chemicals. Although these substances typically exist in trace concentrations in aquatic environments, their environmental persistence, bioaccumulation, and potential toxicity pose a considerable threat to ecosystems and human health.

[0003] Existing conventional wastewater treatment plants generally have poor removal efficiency for low-concentration organic micropollutants. Current technologies for treating organic micropollutants mainly fall into two categories: physicochemical methods and biological methods. Physicochemical methods primarily encompass adsorption, membrane separation technology, and advanced oxidation processes; however, these methods have significant limitations in practical applications, particularly high energy consumption and operating costs. In contrast, biological treatment systems are considered a more promising technology for removing organic micropollutants due to their low operating costs, environmental friendliness, and strong sustainability, especially suitable for the wastewater treatment needs of developing countries. However, traditional activated sludge processes and biofilm reactors have low and unstable removal efficiency for organic micropollutants, with some pollutants being discharged with the effluent before complete degradation, causing secondary pollution. Therefore, developing novel and efficient biological treatment systems to improve their removal efficiency for various organic micropollutants has become an important research direction in the field of wastewater treatment. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a wastewater treatment device and method that can effectively remove organic micropollutants from wastewater and mineralize intermediate products, thereby avoiding secondary pollution.

[0005] This invention provides a wastewater treatment device, comprising: a reactor, with an inlet pipe connected to its top and an outlet pipe connected to its bottom, wherein wastewater enters the reactor through the inlet pipe and is discharged through the outlet pipe; and further comprising: A granular activated carbon layer is disposed at the bottom of the reactor, and the granular activated carbon layer is loaded with manganese-oxidizing bacteria and bio-manganese oxides. Multiple K3 packing materials are placed inside the reactor and above the granular activated carbon layer. The K3 packing materials are enriched with activated sludge and manganese-oxidizing bacteria.

[0006] Preferably, the reactor is equipped with a dissolved oxygen meter and a pH meter. The dissolved oxygen meter is used to detect the dissolved oxygen content in the reactor, and the pH meter is used to detect the pH value in the reactor. The reactor is also equipped with an aeration structure, which includes: An aeration pump, the output end of which is connected to a connecting pipe; An aeration disc is installed inside the reactor. The aeration disc is connected to the end of the connecting pipe away from the aeration pump. The aeration disc is located above the granular activated carbon layer. The controller is electrically connected to the aeration pump, the dissolved oxygen meter, and the pH meter.

[0007] Preferably, the reactor is equipped with a temperature control component, which is used to regulate the temperature inside the reactor. The temperature control component includes: A heating element is disposed on the reactor, and the heating element is electrically connected to the controller; A temperature sensor is used to detect the temperature inside the reactor, and the temperature sensor is electrically connected to the controller.

[0008] Preferably, the reactor has a sludge discharge port on its side wall, the sludge discharge port being located above the granular activated carbon layer, and further includes: a sludge discharge structure, the sludge discharge structure comprising: A backwash pipe is connected to the bottom of the reactor; A backwash pump, the output end of which is connected to the end of the backwash pipe away from the reactor, and the input end of which is used to connect to the treated water, and the backwash pump is electrically connected to the controller.

[0009] Preferably, the backwash pipe is provided with a first valve, and the outlet pipe is provided with a second valve, both of which are electrically connected to the controller.

[0010] This invention provides a wastewater treatment method using a wastewater treatment device, comprising the following steps: A layer of granular activated carbon and multiple K3 packing materials are laid at the bottom of the reactor, and inoculum sources of activated sludge and manganese oxidizing bacteria are added. Add Mn to the reactor 2+ A solution is used to load bio-manganese oxides onto the surface of the granular activated carbon layer. Wastewater to be treated is introduced into the reactor. The granular activated carbon layer removes some organic micropollutants. The remaining organic micropollutants are further decomposed through the biodegradation of activated sludge enriched on the multiple K3 packing materials and the chemical oxidation of bio-manganese oxides loaded on the granular activated carbon layer. Simultaneously, the Mn in the bio-manganese oxides is also removed. 4+ It is reduced to Mn after reacting with organic micropollutants.2+ Mn 2+ Manganese oxidizing bacteria loaded on the granular activated carbon layer and the multiple K3 packings oxidize manganese to Mn. 4+ The treated water is discharged into the water tank through the outlet pipe, and the water quality is tested.

[0011] Preferably, when introducing the wastewater to be treated into the reactor, the following steps are also included: The temperature sensor monitors the temperature inside the reactor in real time. When the temperature is below the temperature threshold, the controller controls the heating element to heat up. When the temperature is above the temperature threshold, the controller controls the heating element to stop heating. The dissolved oxygen meter monitors the dissolved oxygen concentration in the reactor in real time. When the dissolved oxygen concentration is lower than the dissolved oxygen concentration threshold, the controller controls the aeration pump to work. When the dissolved oxygen concentration is higher than the dissolved oxygen concentration threshold, the controller controls the aeration pump to stop working. The pH meter monitors the pH value in the reactor in real time. When the pH value is lower than the acid-base threshold, an alkaline solution is added to the reactor for adjustment. When the pH value is higher than the acid-base threshold, an acidic solution is added to the reactor for adjustment.

[0012] Preferably, the temperature threshold is 25℃~28℃, the dissolved oxygen concentration threshold is 2.5±0.5mg / L, and the pH threshold is 7±0.5.

[0013] Preferably, the added Mn 2+ The concentration of the solution is 4 mg / L to 5 mg / L.

[0014] Preferably, when the wastewater to be treated is introduced into the reactor, the hydraulic retention time is controlled to be 8±2 hours. Simultaneously, sludge is discharged through the sludge discharge structure during the wastewater treatment process. The sludge discharge through the sludge discharge structure includes the following steps: Close the second valve and open the first valve; The controller controls the backwash pump to operate, allowing the treated water to be introduced into the reactor from the bottom through the backwash pipe, and the water containing sludge to be discharged through the sludge discharge port.

[0015] Compared with the prior art, the present invention discloses a wastewater treatment device and method, the advantages of which are: This device achieves highly efficient removal of organic micropollutants through a multi-mechanism synergistic effect. It innovatively combines activated carbon adsorption, microbial degradation, and bio-manganese oxide oxidation into a highly efficient pollutant synergistic removal system. After the granular activated carbon layer rapidly adsorbs and traps pollutants, the bio-manganese oxide loaded on the granular activated carbon layer catalytically oxidizes recalcitrant organic matter. The intermediate products generated by this oxidation can be used as a carbon source for further degradation and utilization by the activated sludge and manganese-oxidizing bacteria enriched within the K3 packing material. Simultaneously, the system's unique manganese recycling mechanism enables continuous regeneration of the oxidant, significantly reducing operating costs. This device effectively removes organic micropollutants from wastewater and mineralizes intermediate products, preventing secondary pollution. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] Figure label: 1—Inlet pipe, 2—Backwash pipe, 3—Backwash pump, 4—Aeration pump, 5—Overflow port, 6—K3 packing, 7—Aeration disc, 8—Sludge discharge port, 9—Granular activated carbon layer, 10—Pebbles, 11—Outlet pipe, 12—Temperature control component, 13—pH meter, 14—Dissolved oxygen meter. Detailed Implementation

[0019] The following detailed description of a specific embodiment of the present invention is provided in conjunction with the accompanying drawings. However, it should be understood that the scope of protection of the present invention is not limited to the specific embodiment.

[0020] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the technical solution of this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0022] Furthermore, in the description of this invention, "a plurality of" refers to two or more. The terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0023] Example 1 This invention provides a wastewater treatment device and method, as follows: Figure 1As shown, the reactor includes: a reactor, a granular activated carbon layer 9, K3 packing 6, and a detection structure. The reactor has an inlet pipe 1 connected to the top and an outlet pipe 11 connected to the bottom. Wastewater enters the reactor through the inlet pipe 1 and exits through the outlet pipe 11. An overflow port 5 is located at the top of the reactor, above the wastewater level. Wastewater exceeding the overflow port 5 flows out through it. The granular activated carbon layer 9 is located at the bottom of the reactor. The granular activated carbon is relatively large and heavy, allowing it to accumulate at the bottom. A layer of pebbles 10 is also laid at the bottom of the granular activated carbon layer 9 as a support layer. The granular activated carbon layer 9 is loaded with manganese oxide. The granular activated carbon layer 9 primarily supports manganese-oxidizing bacteria and bio-manganese oxides, while also serving as an adsorption and retention layer. Specifically, the granular activated carbon layer 9 utilizes the strong oxidizing power of bio-manganese oxides to directly degrade organic matter, while simultaneously performing adsorption and retention functions to achieve the initial removal of organic micropollutants. Multiple K3 packing materials 6 are placed inside the reactor, above the granular activated carbon layer 9. The K3 packing materials 6 are enriched with activated sludge and manganese-oxidizing bacteria. The K3 packing materials 6 possess advantages such as large surface area, good hydrophilicity, strong shock resistance, easy biofilm formation, and high biological activity. This method effectively promotes the retention of activated sludge and the formation of a biofilm by manganese-oxidizing bacteria, thereby significantly improving the treatment efficiency and operational stability of the reactor. In this embodiment, the K3 packing 6 mainly enriches activated sludge and manganese-oxidizing bacteria to form a highly efficient biofilm. In this embodiment, the reactor is filled with a composite functional layer consisting of K3 packing 6, granular activated carbon layer 9, and the substances loaded on it, to achieve the treatment of organic micropollutants in wastewater. By combining K3 packing 6 with granular activated carbon layer 9, the synergistic effect of the two packings can be fully utilized. The three-dimensional structure of K3 packing 6 provides a good attachment carrier for microbial communities, while the microporous characteristics of granular activated carbon layer 9 effectively enhance the system's adsorption and retention capacity for manganese oxides. The detection structure includes a temperature control component 12, a dissolved oxygen meter 14, and a pH meter 13 to monitor whether the internal environment of the reactor is the most suitable environment for wastewater treatment, making the internal environment of the reactor suitable for microbial proliferation and oxidation of organic micropollutants. The temperature control component 12 is used to regulate the temperature inside the reactor, the dissolved oxygen meter 14 is used to detect the dissolved oxygen content inside the reactor, and the pH meter 13 is used to detect the pH value inside the reactor. The working principle of this embodiment is as follows: Wastewater is introduced into the reactor, where it undergoes physical adsorption and retention by the granular activated carbon layer 9, initially removing some organic micropollutants. The remaining organic micropollutants are then further degraded into small-molecule intermediates with significantly reduced toxicity through biodegradation by microorganisms enriched on the K3 packing 6 and chemical oxidation by bio-manganese oxides loaded on the granular activated carbon layer 9. These intermediates can then be used as carbon sources for further degradation by microorganisms, thereby achieving the treatment of organic micropollutants in the wastewater. Simultaneously, the Mn in the bio-manganese oxides... 4+ It is reduced to Mn after reacting with organic micropollutants.2+ Mn 2+ Manganese is oxidized to Mn by manganese-oxidizing bacteria loaded on the granular activated carbon layer 9 and multiple K3 packing materials 6. 4+ This enables the recycling of manganese, thereby allowing it to continue to play its role in oxidizing and degrading organic micropollutants.

[0024] This device achieves highly efficient removal of organic micropollutants through a multi-mechanism synergistic effect. It innovatively combines activated carbon adsorption, microbial degradation, and bio-manganese oxide oxidation into a highly efficient pollutant synergistic removal system. After the granular activated carbon layer 9 rapidly adsorbs and traps pollutants, the bio-manganese oxide loaded on the granular activated carbon layer 9 catalytically oxidizes recalcitrant organic matter. The intermediate products generated by this oxidation can be used as a carbon source for further degradation and utilization by the activated sludge and manganese-oxidizing bacteria enriched within the K3 packing 6. Simultaneously, the unique manganese recycling mechanism of the treatment system enables continuous regeneration of the oxidant, significantly reducing operating costs. This device can effectively remove organic micropollutants from wastewater and mineralize intermediate products, avoiding secondary pollution.

[0025] This embodiment provides a specific configuration of a temperature control component 12. Further, the temperature control component 12 includes: a heating element, a temperature sensor, and a controller. The heating element is disposed on the reactor, specifically on the outer wall of the reactor, to heat the reactor. The heating element can be a heating plate, a heating tube, or other element that heats upon being energized; the specific method is selected based on the actual situation. The temperature sensor is used to detect the temperature inside the reactor in real time and sends the monitored temperature signal to the controller. The controller is electrically connected to the heating element and the temperature sensor. The working principle of the temperature control component 12 in this embodiment is as follows: the temperature sensor monitors the temperature inside the reactor in real time and sends the temperature signal to the controller. After receiving the temperature signal, the controller compares whether the temperature inside the reactor is at a suitable temperature. If it is lower than the suitable temperature, the controller controls the heating element to heat up to the suitable temperature; if it is higher than the suitable temperature, the controller controls the heating element to stop working. In addition, the controller is electrically connected to the dissolved oxygen meter 14 and the pH meter 13.

[0026] Example 2 As a further improvement on Example 1, when the dissolved oxygen meter 14 detects that the dissolved oxygen content in the reactor is lower than the content suitable for treating wastewater, the system further includes: an aeration structure installed inside the reactor, comprising: an aeration pump 4, a connecting pipe, and an aeration disc 7. The output end of the aeration pump 4 is connected to the connecting pipe, and the aeration pump 4 is electrically connected to the controller; the aeration disc 7 is installed inside the reactor, and the aeration disc 7 is connected to the end of the connecting pipe opposite to the aeration pump 4. The aeration pump 4 can guide air through the connecting pipe to the aeration disc 7, and then into the reactor, increasing the dissolved oxygen content in the reactor. The aeration disc 7 is located above the granular activated carbon layer 9. The working principle of the aeration structure in this embodiment is as follows: the dissolved oxygen meter 14 monitors the dissolved oxygen content in the reactor in real time and feeds back the specific content to the controller. If the dissolved oxygen content in the reactor is detected to be at a low level, the controller controls the aeration pump 4 to work. The aeration pump 4 can guide air through the connecting pipe to the aeration disc 7, and then into the reactor from the aeration disc 7, increasing the dissolved oxygen content in the reactor. By setting up an aeration structure, continuous aeration can be achieved in the reactor, ensuring that the dissolved oxygen content in the reactor is at a suitable level, which facilitates wastewater treatment.

[0027] In this embodiment, the other structures are the same as in embodiment 1, except that optimizations have been made to embodiment 1.

[0028] Example 3 As a further improvement on Example 1, the system also includes: a sludge discharge port 8 is provided on the side wall of the reactor, located above the granular activated carbon layer 9. After prolonged wastewater treatment, a large amount of sludge accumulates on the granular activated carbon layer 9. The sludge is discharged through the sludge discharge port 8 to avoid affecting the treatment effect. The system also includes a sludge discharge structure, comprising: a backwash pipe 2 and a backwash pump 3. The backwash pipe 2 is connected to the bottom of the reactor; the output end of the backwash pump 3 is connected to the end of the backwash pipe 2 away from the reactor, and the input end is used to connect to treated water. The backwash pump 3 is electrically connected to the controller. During wastewater treatment, the sludge needs to be treated periodically through the sludge discharge structure. During treatment, the controller controls the backwash pump 3 to operate, pumping treated water from the bottom of the reactor into the reactor through the backwash pipe 2. The force of the water flushes the sludge adsorbed and trapped in the granular activated carbon layer 9 from bottom to top, and then discharges it through the sludge discharge port 8. This embodiment, by setting up a sludge discharge structure, can periodically discharge excess sludge, effectively maintaining the porosity of the granular activated carbon layer 9 and preventing filter layer clogging caused by sludge deposition, thereby ensuring the long-term stable operation of the treatment system. Excess water during sludge backwashing can also flow out through the overflow port 5, simply by connecting different pipes to the overflow port 5.

[0029] During sludge backwashing, the flow of wastewater must be stopped. Furthermore, a first valve is installed on the backwash pipe 2, and a second valve is installed on the outlet pipe 11. Both the first and second valves are electrically connected to the controller. That is, when treating wastewater, the controller closes the first valve and opens the second valve; when performing sludge backwashing, the controller opens the first valve and closes the second valve.

[0030] In this embodiment, the other structures are the same as in embodiment 1, except that optimizations have been made to embodiment 1.

[0031] Example 4 This invention provides a wastewater treatment method using the wastewater treatment apparatus described in Examples 1-3, comprising the following steps: Step 1: Lay a granular activated carbon layer 9 and multiple K3 packing materials 6 at the bottom of the reactor. The flocculent activated sludge from the secondary sedimentation tank of the sewage treatment plant and the backwash sludge from the manganese oxidation biological filter are used as inoculation sources for activated sludge and manganese oxidation bacteria, respectively. Step 2: Add Mn to the reactor 2+ The solution was used to load bio-manganese oxide onto the surface of the granular activated carbon layer 9. Once the reactor's efficiency in treating organic micropollutants stabilized and reached over 80%, the addition of Mn was stopped. 2+ Solution; Step 3: The wastewater to be treated is introduced into the reactor, and the second valve is opened simultaneously. The treated water is discharged into the water tank through the outlet pipe 11, and water quality testing is performed to check whether the treated water meets the standards. This also serves as feedback on the effectiveness of the treatment device. During the wastewater treatment process, the second valve remains open, and the first valve remains closed. Mn can be continuously added to the reactor as needed during the wastewater introduction process. 2+ Solution; Step 4: The temperature sensor monitors the temperature inside the reactor in real time. When the temperature is below the temperature threshold, the controller controls the heating element to heat up. When the temperature is above the temperature threshold, the controller controls the heating element to stop heating up, so that the temperature inside the reactor is at a suitable temperature for microbial proliferation and oxidation of organic micropollutants. Step 5: Dissolved oxygen meter 14 monitors the dissolved oxygen concentration in the reactor in real time. When the dissolved oxygen concentration is lower than the dissolved oxygen concentration threshold, the controller controls the aeration pump 4 to work. When the dissolved oxygen concentration is higher than the dissolved oxygen concentration threshold, the controller controls the aeration pump 4 to stop working, so that the temperature in the reactor is at a suitable dissolved oxygen concentration for microbial proliferation and oxidation of organic micropollutants. Step 6: The pH meter 13 monitors the pH value in the reactor in real time. When the pH value is lower than the acid-base threshold, an alkaline solution is added to the reactor for adjustment. When the pH value is higher than the acid-base threshold, an acidic solution is added to the reactor for adjustment, so that the temperature in the reactor is at a suitable pH level for microbial proliferation and oxidation of organic micropollutants.

[0032] Furthermore, the addition of Mn 2+ The concentration of the solution is 4 mg / L to 5 mg / L. Within this concentration range, it is easier to load bio-manganese oxides onto the surface of the granular activated carbon layer 9.

[0033] Furthermore, the temperature threshold is 25℃~28℃, the dissolved oxygen concentration threshold is 2.5±0.5mg / L, and the pH threshold is 7±0.5. That is, when the temperature is 25℃~28℃, the dissolved oxygen concentration is 2.5±0.5mg / L, and the pH is 7±0.5, the reactor is in an environment suitable for microbial proliferation and oxidation of organic micropollutants.

[0034] Furthermore, when introducing the wastewater to be treated into the reactor, the hydraulic retention time is controlled to be 8±2 hours. Simultaneously, sludge is discharged through a sludge removal structure during the wastewater treatment process. The sludge removal process includes the following steps: Step 1: Close the second valve and open the first valve. That is, when backwashing sludge, it is necessary to stop the sewage flow into the treatment. Step 2: The controller controls the backwash pump 3 to operate, and the treated water is introduced into the reactor from the bottom of the reactor through the backwash pipe 2, and the water with sludge is discharged through the sludge discharge port 8.

[0035] The advantages of this invention lie in its multi-mechanism synergistic effect, achieving highly efficient removal of organic micropollutants. It innovatively combines activated carbon adsorption, microbial degradation, and bio-manganese oxide oxidation into a highly efficient pollutant synergistic removal system. After the granular activated carbon layer rapidly adsorbs and traps pollutants, the bio-manganese oxide loaded on the granular activated carbon layer catalytically oxidizes recalcitrant organic matter. The intermediate products generated by this oxidation can be used as a carbon source for further degradation and utilization by the activated sludge and manganese-oxidizing bacteria enriched within the K3 packing. Simultaneously, the unique manganese recycling mechanism of the treatment system enables continuous regeneration of the oxidant, significantly reducing operating costs. This device can effectively remove organic micropollutants from wastewater and mineralize intermediate products, avoiding secondary pollution.

[0036] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A wastewater treatment device, comprising: A reactor, with an inlet pipe (1) connected to its top and an outlet pipe (11) connected to its bottom, wherein wastewater enters the reactor through the inlet pipe (1) and is discharged through the outlet pipe (11), characterized in that it further comprises: A granular activated carbon layer (9) is disposed at the bottom of the reactor, and manganese-oxidizing bacteria and bio-manganese oxides are loaded in the granular activated carbon layer (9); Multiple K3 packing materials (6) are placed inside the reactor and above the granular activated carbon layer (9). The K3 packing materials (6) are enriched with activated sludge and manganese oxidizing bacteria.

2. The wastewater treatment device according to claim 1, characterized in that, The reactor is equipped with a dissolved oxygen meter (14) and a pH meter (13). The dissolved oxygen meter (14) is used to detect the dissolved oxygen content in the reactor, and the pH meter (13) is used to detect the pH value in the reactor. The reactor is equipped with an aeration structure, which includes: Aeration pump (4), whose output end is connected to a connecting pipe; An aeration disc (7) is installed inside the reactor. The aeration disc (7) is connected to the end of the connecting pipe away from the aeration pump (4). The aeration disc (7) is located above the granular activated carbon layer (9). The controller is electrically connected to the aeration pump (4), the dissolved oxygen meter (14), and the pH meter (13).

3. The wastewater treatment device according to claim 2, characterized in that, The reactor is equipped with a temperature control component (12), which is used to regulate the temperature inside the reactor. The temperature control component (12) includes: A heating element is disposed on the reactor, and the heating element is electrically connected to the controller; A temperature sensor is used to detect the temperature inside the reactor, and the temperature sensor is electrically connected to the controller.

4. A wastewater treatment device according to claim 2, characterized in that, The reactor has a sludge discharge port (8) on its side wall, the sludge discharge port (8) being located above the granular activated carbon layer (9), and further includes a sludge discharge structure, the sludge discharge structure comprising: The backwash pipe (2) is connected to the bottom of the reactor; The backwash pump (3) has its output end connected to the end of the backwash pipe (2) away from the reactor and its input end used to connect to the treated water. The backwash pump (3) is electrically connected to the controller.

5. A wastewater treatment device according to claim 4, characterized in that, The backwash pipe (2) is equipped with a first valve, and the outlet pipe (11) is equipped with a second valve. Both the first valve and the second valve are electrically connected to the controller.

6. A wastewater treatment method, using the wastewater treatment apparatus according to any one of claims 1 to 5, characterized in that, The following steps are involved: A granular activated carbon layer (9) and multiple K3 packing materials (6) are laid at the bottom of the reactor, and inoculum sources of activated sludge and manganese oxidizing bacteria are added. Add Mn to the reactor 2+ The solution was used to load bio-manganese oxides onto the surface of the granular activated carbon layer (9); Wastewater to be treated is introduced into the reactor. The granular activated carbon layer (9) removes some organic micropollutants. The remaining organic micropollutants are further decomposed through the biodegradation of activated sludge enriched on the multiple K3 packing materials (6) and the chemical oxidation of bio-manganese oxides loaded on the granular activated carbon layer (9). Simultaneously, the Mn in the bio-manganese oxides... 4+ It is reduced to Mn after reacting with organic micropollutants. 2+ Mn 2+ Manganese oxidizing bacteria loaded on the granular activated carbon layer (9) and the multiple K3 packings (6) oxidize manganese to Mn. 4+ The treated water is discharged into the water tank through the outlet pipe (11) and the water quality is tested.

7. A wastewater treatment method according to claim 6, characterized in that, When introducing wastewater to be treated into the reactor, the following steps are also included: The temperature sensor monitors the temperature inside the reactor in real time. When the temperature is below the temperature threshold, the controller controls the heating element to heat up. When the temperature is above the temperature threshold, the controller controls the heating element to stop heating. The dissolved oxygen meter (14) monitors the dissolved oxygen concentration in the reactor in real time. When the dissolved oxygen concentration is lower than the dissolved oxygen concentration threshold, the controller controls the aeration pump (4) to work. When the dissolved oxygen concentration is higher than the dissolved oxygen concentration threshold, the controller controls the aeration pump (4) to stop working. The pH meter (13) monitors the pH value in the reactor in real time. When the pH value is lower than the acid-base threshold, an alkaline solution is added to the reactor for adjustment. When the pH value is higher than the acid-base threshold, an acidic solution is added to the reactor for adjustment.

8. A wastewater treatment method according to claim 7, characterized in that, The temperature threshold is 25℃~28℃, the dissolved oxygen concentration threshold is 2.5±0.5mg / L, and the pH threshold is 7±0.

5.

9. A wastewater treatment method according to claim 6, characterized in that, Added Mn 2+ The concentration of the solution is 4 mg / L to 5 mg / L.

10. A wastewater treatment method according to claim 6, characterized in that, When the wastewater to be treated is introduced into the reactor, the hydraulic retention time is controlled to be 8±2 hours. Simultaneously, sludge is discharged through the sludge discharge structure during the wastewater treatment process. The sludge discharge through the sludge discharge structure includes the following steps: Close the second valve and open the first valve; The controller controls the backwash pump (3) to operate, and the treated water is introduced into the reactor from the bottom of the reactor through the backwash pipe (2), and the water with sludge is discharged through the sludge discharge port (8).

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