A combined, high-efficiency device and method for treating black and odorous water bodies in rural areas.

Abstract

This invention relates to the field of wastewater treatment technology and discloses a combined, high-efficiency device and method for treating black and odorous water bodies in rural areas. The device includes a support frame and a pretreatment unit, an aeration unit, a microbial agent dosing unit, and an electrolytic adsorption unit, all installed on the support frame and connected in sequence. The invention has a reasonable overall structural design and effectively achieves comprehensive purification of black and odorous water bodies in rural areas using the pretreatment unit, aeration unit, microbial agent dosing unit, and electrolytic adsorption unit. The pretreatment unit performs preliminary treatment of the black and odorous water body; after adding flocculant through a flocculation component, a multi-stage adsorption component is used to initially separate a large amount of contaminated sludge from the water.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and discloses a combined, highly efficient device and method for treating black and odorous water bodies in rural areas. Background Technology

[0002] In recent years, wastewater treatment has become an extremely important theme in human sustainable development. However, the amount of freshwater that humans actually need accounts for only 2.5% of the total water volume on Earth. Therefore, saving polluted water sources has become urgent. Rural domestic sewage treatment has become an important part of rural living environment improvement work. In particular, black and odorous water bodies are prone to form in densely populated areas of villages. Black and odorous water bodies refer to water bodies with obviously abnormal color or that emit strong and unpleasant odors.

[0003] Black and odorous water bodies damage existing ecosystems, deteriorate water quality, and reduce biodiversity. When the number of aquatic organisms and microorganisms in the water decreases, the aquatic ecological balance is gradually disrupted. During dry seasons, rural black and odorous water bodies exhibit low flow, leading to high concentrations of nutrients and eutrophication. This fosters the growth of more foul-smelling substances. Metal ions in the water undergo reduction reactions under the influence of nutrients, causing heavy metals to seep into groundwater and pollute the watershed system. During wet seasons, some intermittent water bodies regain flow, increasing the circulation within the watershed system. Once black and odorous water bodies flow with other rivers, pollutants can harm the aquatic environment and organisms in other watersheds.

[0004] Existing wastewater treatment technologies mostly employ reaction tanks, which are large-scale facilities with simple filtration and purification methods. In contrast, rural areas primarily rely on ditches and ponds, which are often stagnant and have poor water circulation, resulting in more complex pollutant compositions. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a combined, highly efficient device and method for treating black and odorous water bodies in rural areas.

[0006] The technical solution of the present invention is: a combined high-efficiency device for treating black and odorous water bodies in rural areas, characterized in that it includes a support frame, and a pretreatment unit, an aeration treatment unit, a microbial agent dosing unit, an electrolytic adsorption unit, and an adsorption component located inside the pretreatment unit, which are respectively installed on the support frame and connected in sequence; the pretreatment unit includes a pretreatment box fixedly installed on the support frame, and a multi-stage filtration component and a slag discharge pipe assembly respectively installed inside the pretreatment box.

[0007] The adsorption assembly includes multiple sub-adsorption elements spaced apart from top to bottom; each of the multiple sub-adsorption elements includes a rotating shaft rotatably mounted on the multi-stage filtration assembly, an adsorption belt mounted on the rotating shaft with multiple filter holes evenly distributed on its surface, and multiple variable diameter components corresponding to the filter holes; the adsorption belt has a water-passing cavity for storing adsorption resin.

[0008] The aeration treatment unit includes an aeration box whose inlet end is connected to the outlet end of the pretreatment box, and a rotating component and an aeration component respectively disposed inside the aeration box; the microbial agent dosing unit includes a settling box whose inlet end is connected to the outlet end of the aeration box, a microbial dosing component disposed inside the settling box, and a filter component disposed inside the settling box.

[0009] The filter mud assembly includes a filter plate disposed inside the filter chamber and dividing the filter chamber into a drainage chamber and a mud discharge chamber, an auxiliary suction assembly disposed inside the water inlet chamber, and a mud pushing device located at the bottom of the mud discharge chamber.

[0010] Furthermore, the multi-stage filtration assembly includes a flocculation assembly disposed inside the pretreatment chamber via a fixing plate, and the adsorption assembly is disposed inside the pretreatment chamber via a fixing plate and located below the flocculation assembly;

[0011] The flocculation assembly includes a rotating shaft movably mounted on the fixed plate, a filter belt mounted on the rotating shaft, and a dosing box located inside the filter belt.

[0012] The injection box includes a storage chamber filled with flocculant and multiple dispensing channels connected to the storage chamber.

[0013] Note: The injection box adopts a storage chamber structure with flocculant inside. The agent is effectively dispersed into the water around the flocculation component through the dispersing channel connected to the storage chamber, which can accelerate the flocculation of black and odorous water bodies.

[0014] Furthermore, the filter belt is provided with water filtration holes, and the surface of the filter belt is provided with dispersing blades; the dispersing blades include a blade body and a guide groove provided in the blade body;

[0015] The filtration assembly includes a filter disc housing disposed inside the settling chamber, and a filter mud assembly disposed inside the filter disc housing.

[0016] The filter disc housing includes a filter disc body, an upper plate installed at the upper end of the filter disc body, and a lower plate installed at the lower end of the filter disc body.

[0017] The filter disc body has an inlet chamber inside, and a filter chamber that communicates with the inlet chamber is also provided inside the filter disc body.

[0018] The upper plate is provided with a first water passage groove communicating with the filter chamber, and the lower plate is provided with a second water passage groove communicating with the water inlet chamber.

[0019] The inoculation component is used to inoculate sludge treatment bacteria; the inoculation component includes a distribution pipe disposed on the lower plate, and an inoculation pipe with one end penetrating the upper plate and communicating with the distribution pipe; the other end of the inoculation pipe extends to the outside of the settling chamber.

[0020] Explanation: When the filter belt moves under the action of the rotating shaft, the dispersing blades can drive the flow of sewage around the filter belt, thereby accelerating the dissolution of the agent and further improving the efficiency of flocculating black and odorous water bodies.

[0021] Furthermore, the variable diameter assembly includes a mounting base installed on the adsorption belt and located on the filter holes, and a variable diameter disc movably disposed on the mounting base; the variable diameter disc includes a baffle movably installed on the mounting base, and a variable diameter rotating ring movably connected to the two baffles respectively via a push rod;

[0022] The mounting base is provided with a limiting block; the variable diameter plate is provided with a limiting groove that can engage with the limiting block;

[0023] The adsorption belt is equipped with an electric push rod capable of driving the variable diameter rotating ring to rotate;

[0024] The slag discharge pipe assembly includes multiple collection ports that are arranged one-to-one below the multiple adsorption zones, and slag discharge pipes that are respectively connected to the multiple collection ports;

[0025] The surface of the adsorption belt is provided with a mud storage trough, and the longitudinal section of the mud storage trough is trapezoidal; the surface of the adsorption belt is provided with a mud storage trough, and the longitudinal section of the mud storage trough is trapezoidal.

[0026] Note: The surface of the adsorption belt adopts a sludge storage tank structure, which can retain the flocculated sludge on the surface of the adsorption belt, thereby increasing the adsorption effect of the adsorption belt.

[0027] Furthermore, the adsorption belt is provided with a sludge scraping assembly that can contact the sludge storage tank; the sludge scraping assembly includes a sludge scraper and a mounting rod for mounting the sludge scraper.

[0028] Note: The scraper blades that come into contact with the sludge storage tank can carry the sludge remaining in the tank to the collection port, effectively shortening the sludge discharge time and promoting the recycling of the equipment.

[0029] Furthermore, the rotating assembly includes a stirring shaft located inside the aeration chamber, a mounting plate disposed on the stirring shaft, and a motor for providing power to the stirring shaft.

[0030] Explanation: The mounting plate on the rotating component drives the water flow, which can effectively achieve the stirring treatment of black and odorous water bodies.

[0031] Furthermore, the aeration assembly includes an aeration disc mounted on the mounting plate and an air source assembly connected to the aeration disc.

[0032] Note: The aeration discs installed on the mounting plate can aerate the water being stirred during the mixing process of the mounting plate. Stirring the water can make the aeration process more complete and improve the aeration efficiency.

[0033] Furthermore, the auxiliary suction assembly includes an electric push rod with its top end disposed at the top of the auxiliary suction cavity, an auxiliary suction plate disposed at the bottom end of the movable push rod, and a water inlet pipe for connecting the water inlet cavity and the filter cavity; a baffle plate is disposed inside the filter cavity and above the water inlet pipe;

[0034] The second water channel is provided with a first water inlet valve for water to enter the water inlet cavity; the auxiliary suction plate is provided with a second water inlet valve for water to enter the upper part of the auxiliary suction plate; and the water inlet pipe is provided with an outlet valve for water to exit.

[0035] Note: The baffle plate prevents excessive water flow impact from causing sludge to splash and affecting the filtration effect. The first inlet valve, second inlet valve, and outlet valve are all one-way valves, ensuring that the first inlet valve allows water to enter in one direction when the auxiliary suction plate rises, and closes when the auxiliary suction plate pushes down, while the second inlet valve allows water to enter. The auxiliary suction plate can quickly draw sewage into the inlet chamber, thereby accelerating sludge filtration. The one-way outlet valve can prevent water backflow in the filtration chamber.

[0036] Furthermore, the electrolytic adsorption unit includes an electrolytic tank whose inlet end is connected to the outlet end of the settling tank, a base disposed inside the electrolytic tank, and a plurality of electrolytic plates evenly circumferentially disposed on the base; a main outlet pipe is disposed on the electrolytic tank; each of the plurality of electrolytic plates includes a mounting plate, an adsorption element disposed on the mounting plate, and electrode assemblies disposed on the mounting plate and located on both sides of the adsorption element; the adsorption element includes an adsorption chamber shell and graphene oxide solid filled in the adsorption chamber shell; the electrode assembly includes a positive electrode located on one side of the adsorption element and a negative electrode located on the other side of the adsorption element.

[0037] Note: The adsorption element can adsorb pollutants in black and odorous water bodies, and the electrolysis plate can electrolytically remediate black and odorous water bodies.

[0038] Compared with existing technologies, the beneficial effects of this invention are as follows: The overall structure of this invention is rationally designed, effectively achieving comprehensive purification of rural black and odorous water bodies through a pretreatment unit, an aeration unit, a microbial agent dosing unit, and an electrolytic adsorption unit. Specifically, the pretreatment unit can perform preliminary treatment of the black and odorous water body; after adding flocculant through the flocculation component, a large amount of polluted sludge is initially separated from the water using a multi-stage adsorption component. The variable diameter component of this invention can effectively control the filtration effect by adjusting the size of the filter holes, avoiding clogging. The adsorption belt rotates via a rotating shaft, and a sludge storage tank is provided on the surface of the adsorption belt, which can retain the flocculated sludge on the surface of the adsorption belt, increasing the adsorption effect and promoting the recycling of the equipment. The aeration unit of this invention uses rotating aeration plates for more thorough aeration. The filtration component allows for further sedimentation of the sludge, and the microbial agent dosing component can adjust the polluted sludge for recycling. Wastewater flows through the electrolysis plate, where oxidation and reduction reactions occur between the anode and cathode electrolysis plates, respectively, removing harmful substances. The multi-step device can comprehensively treat black and odorous water bodies and separate usable soil. This invention has high applicability and is suitable for various types of small and medium-sized sewage, and is more conducive to large-scale use in rural areas. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0040] Figure 2 This is a schematic diagram of the external structure of the preprocessing unit in Embodiment 1 of the present invention;

[0041] Figure 3 This is a schematic diagram of the structure of the multi-stage filtration assembly in Embodiment 1 of the present invention;

[0042] Figure 4 This is a front longitudinal sectional view of the adsorption zone in Embodiment 1 of the present invention;

[0043] Figure 5 This is a left longitudinal sectional view of the adsorption belt in Embodiment 1 of the present invention;

[0044] Figure 6 This is a schematic diagram of the variable diameter assembly of Embodiment 1 of the present invention;

[0045] Figure 7 This is a cross-sectional view of the aeration treatment unit, the microbial agent dosing unit, and the filter mud assembly in Embodiment 1 of the present invention;

[0046] Figure 8 This is a cross-sectional view of the aeration treatment unit of Embodiment 1 of the present invention;

[0047] Figure 9 This is a cross-sectional view of the microbial agent dispensing unit in Embodiment 1 of the present invention;

[0048] Figure 10This is a longitudinal sectional view of the filter mud assembly of Embodiment 1 of the present invention;

[0049] Figure 11 This is a cross-sectional view of the filter mud assembly of Embodiment 1 of the present invention;

[0050] Figure 12 This is a cross-sectional view of the electrolytic adsorption unit in Embodiment 1 of the present invention;

[0051] Figure 13 This is a left longitudinal sectional view of the adsorption belt in Embodiment 2 of the present invention;

[0052] Among them, 1-pretreatment unit, 11-pretreatment box, 12-multi-stage filter assembly, 121-flocculation assembly, 1211-rotating shaft, 1212-filter belt, 1213-dosing box, 1214-dosing leaf, 13-slag discharge pipe assembly, 131-collection port, 132-slag discharge pipe, 2-aeration treatment unit, 21-aeration box, 22-rotating assembly, 221-stirring shaft, 222-mounting plate, 23-aeration assembly, 231-aeration disc, 3-microbial agent dosing unit, 31-static box, 32-microbial agent dosing assembly, 321-microbial agent dosing pipe, 322-distribution pipe, 33-filter assembly, 331-filter disc shell, 3311-inlet cavity, 3312-filter cavity. 4-Electrolysis adsorption unit, 41-Electrolysis box, 411-Main outlet pipe, 42-Base, 43-Electrolysis plate, 431-Adsorption element, 5-Adsorption assembly, 51-Adsorption belt, 510-Filter hole, 511-Water passage cavity, 512-Sludge storage tank, 52-Variable diameter assembly, 521-Variable diameter disc, 5211-Limiting groove, 522-Mounting seat, 5221-Limiting block, 523-Push rod, 524-Baffle, 53-Sludge scraping assembly, 6-Sludge filter assembly, 61-Filter plate, 62-Auxiliary suction assembly, 621-Auxiliary suction cavity, 6211-First inlet valve, 622-Electric cylinder, 623-Auxiliary suction plate, 624-Inlet pipe, 6241-Baffle plate, 63-Sludge pushing device. Detailed Implementation

[0053] The present invention will now be described in more detail with reference to specific embodiments, so as to better demonstrate the advantages of the present invention.

[0054] Example 1

[0055] like Figure 1 The device shown is a combined high-efficiency treatment device for black and odorous water bodies in rural areas, including a support frame, and a pretreatment unit 1, an aeration treatment unit 2, a microbial agent dosing unit 3, and an electrolytic adsorption unit 4, which are installed on the support frame and connected in sequence.

[0056] like Figure 2 , 3As shown, the pretreatment unit 1 includes a pretreatment box 11 fixedly mounted on a support frame, and a multi-stage filter assembly 12 and a slag discharge pipe assembly 13 respectively disposed inside the pretreatment box 11.

[0057] The multi-stage filtration assembly 12 includes a flocculation assembly 121 mounted inside the pretreatment chamber 11 via a fixing plate, and an adsorption assembly 5 mounted inside the pretreatment chamber 11 via a fixing plate and located below the flocculation assembly 121. The flocculation assembly 121 includes a rotating shaft 1211 movably mounted on the fixing plate, a filter belt 1212 mounted on the rotating shaft 1211, and a dosing box 1213 located inside the filter belt 1212.

[0058] like Figure 3 , 4 As shown in Figure 5, the adsorption component 5 includes two sub-adsorption components spaced apart from top to bottom; each sub-adsorption component includes a rotating shaft rotatably mounted on a fixed plate, an adsorption belt 51 mounted on the rotating shaft with twenty filter holes 510 evenly distributed on its surface, and twenty variable diameter components 52 arranged one-to-one on the filter holes 510; the adsorption belt 51 has a water-passing cavity 511 for storing adsorption resin inside; wherein, the adsorption resin is TP207 chelating resin produced by Dongguan Huashiwei Water Treatment Equipment Co., Ltd.

[0059] like Figure 6 As shown, the variable diameter assembly 52 includes a mounting base 522 mounted on the adsorption belt 51 and located on the filter hole 510, and a variable diameter disc 521 movably mounted on the mounting base 522; the variable diameter disc 521 includes a baffle 524 movably mounted on the mounting base 522, and a variable diameter rotating ring movably connected to the two baffles 524 respectively via a push rod 523; a limiting block 5221 is provided on the mounting base 522; a limiting groove 5211 is provided on the variable diameter disc 521 that can engage with the limiting block 5221; and an electric push rod is provided on the adsorption belt 51 that can push the variable diameter rotating ring to rotate.

[0060] like Figure 3 As shown, the slag discharge pipe assembly 13 includes two collection ports 131 that are arranged one-to-one below multiple adsorption belts 51, and slag discharge pipes 132 that are respectively connected to the two collection ports 131.

[0061] like Figure 7 , 8 As shown, the aeration treatment unit 2 includes an aeration box 21 whose inlet end is connected to the outlet end of the pretreatment box 11, and a rotating component 22 and an aeration component 23 respectively disposed inside the aeration box 21.

[0062] like Figure 7 , 9As shown, the microbial agent dosing unit 3 includes a settling tank 31 with the inlet end connected to the outlet end of the aeration tank 21, a microbial dosing component 32 disposed inside the settling tank 31, and a filter component 33 disposed inside the settling tank 31.

[0063] The filter assembly 33 includes a filter disc housing 331 disposed inside the settling box 31, and a filter mud assembly 6 disposed inside the filter disc housing 331.

[0064] The filter disc housing 331 includes a filter disc body, an upper plate installed at the upper end of the filter disc body, and a lower plate installed at the lower end of the filter disc body.

[0065] like Figure 10 As shown, the filter disc body has an inlet chamber 3311 inside and a filter chamber 3312 that communicates with the inlet chamber 3311 inside.

[0066] The upper plate is provided with a first water passage groove that communicates with the filter chamber 3312, and the lower plate is provided with a second water passage groove that communicates with the water inlet chamber 3311.

[0067] The inoculation component 32 is used to inoculate sludge treatment bacteria; such as Figure 9 As shown, the inoculation component 32 includes a material distribution pipe 322 disposed on the lower plate, and an inoculation pipe 321 with one end penetrating the upper plate and communicating with the material distribution pipe 322; the other end of the inoculation pipe 321 extends to the outside of the settling box 31; wherein, the sludge treatment bacteria are sludge treatment bacteria produced by Weifang Ruichen Biotechnology Co., Ltd.

[0068] like Figure 10 As shown, the filter mud assembly 6 includes a filter plate 61 disposed inside the filter chamber and dividing the filter chamber into a drainage chamber and a mud discharge chamber, an auxiliary suction assembly 62 disposed inside the water inlet chamber 3311, and a mud pushing device 63 located at the bottom of the mud discharge chamber.

[0069] like Figure 2 , 12 As shown, the electrolytic adsorption unit 4 includes an electrolytic box 41 with its inlet end connected to the outlet end of the settling box 31, a base 42 disposed inside the electrolytic box 41, and multiple electrolytic plates 43 evenly arranged circumferentially on the base 42; a main outlet pipe 411 is provided on the electrolytic box 41.

[0070] like Figure 3 As shown, the injection box 1213 includes a storage chamber filled with flocculant and multiple dispensing channels connected to the storage chamber; the filter belt 1212 is provided with water filtration holes, and the surface of the filter belt 1212 is provided with dispensing blades 1214; the dispensing blades 1214 include a blade body and a guide groove provided in the blade body; wherein, the flocculant is polyaluminum chloride (PAC);

[0071] like Figure 5 As shown, a mud storage trough 512 is provided on the surface of the adsorption belt 51, and the longitudinal section of the mud storage trough 512 is trapezoidal.

[0072] like Figure 8 As shown, the rotating assembly 22 includes a stirring shaft 221 located inside the aeration box 21, a mounting plate 222 disposed on the stirring shaft 221, and a motor for providing power to the stirring shaft 221.

[0073] The aeration assembly 23 includes an aeration disc 231 mounted on a mounting plate 222, and an air source assembly connected to the aeration disc 231.

[0074] like Figure 10 , 11 As shown, the auxiliary suction assembly 62 includes an electric cylinder 622 with its top end set at the top of the auxiliary suction chamber 621, an auxiliary suction plate 623 set at the bottom end of the electric cylinder 622, and an inlet pipe 624 for connecting the water inlet chamber 3311 and the filter chamber 3312; a baffle plate 6241 is provided inside the filter chamber 3312 and above the inlet pipe 624.

[0075] The second water channel is equipped with a first water inlet valve 6211 for water to enter the water inlet cavity 3311; the auxiliary suction plate 623 is equipped with a second water inlet valve for water to enter the upper part of the auxiliary suction plate 623; and the water inlet pipe 624 is equipped with an outlet valve for water to exit.

[0076] like Figure 12 As shown, each electrolysis plate 43 includes a mounting plate, an adsorption element 431 disposed on the mounting plate, and two electrode assemblies disposed on the mounting plate and located on both sides of the adsorption element 431. The adsorption element 431 includes an adsorption chamber shell and graphene oxide solid filled in the adsorption chamber shell. The electrode assembly includes a positive electrode located on one side of the adsorption element 431 and a negative electrode located on the other side of the adsorption element 431.

[0077] It should be noted that this embodiment also includes a PLC controller and a power supply. The PLC controller, power supply, motor, electric actuator, electric cylinder, air source assembly, first water inlet valve, second water inlet valve, water outlet valve, and electrode assembly are all commercially available products and will not be described in detail here.

[0078] The working principle of this embodiment is as follows: The black and odorous water to be treated flows into the pretreatment tank 11. The multi-stage filtration assembly 12 inside the pretreatment tank 11 starts to operate. When the water passes through the flocculation assembly 121, the flocculant in the flocculation assembly 121 dissolves into the water. The dispersing blades 1214 move with the filter belt 1212, causing the water to flow and accelerating the dissolution of the flocculant. Impurities in the water are flocculated and deposited on the adsorption assembly 5 below. The sludge settles onto the stationary adsorption belt 51 and is deposited in the sludge storage tank 512. After the sludge accumulates for a period of time, the adsorption belt 51 starts to move, carrying the sludge on the adsorption belt 51 into the sludge discharge pipe assembly 13 for discharge.

[0079] Water is filtered through the adsorption resin inside the water passage chamber 511 and flows out through the filter holes 510. When the filter cake is too fine or clogged, an electric push rod is triggered to drive the diameter-changing disk 521 of the diameter-changing assembly 52 to rotate. The diameter-changing disk 521 drives the push rod 523 to move, and the push rod 523 drives the baffle 524 to rotate, thereby controlling the size of the filter holes 510.

[0080] The water treated by the adsorption component 5 flows into the aeration treatment unit 2. The rotating component 22 stirs the water in the aeration box 21, and the aeration component 23 fully aerates the stirred water.

[0081] After the water is fully aerated, it enters the settling chamber 31. The electric pusher cylinder 622 drives the auxiliary suction plate 623 to move upward. At this time, the first inlet valve 6211 opens and the second inlet valve opens, allowing the water to enter the auxiliary suction assembly cavity 621. After the liquid reaches a certain level, the electric pusher cylinder 622 stops moving upward and instead pushes downward. Simultaneously, the second inlet valve opens and the first inlet valve 6211 closes. The auxiliary suction plate 623 draws the water into the filter cavity 3312. Sludge treatment bacteria are introduced through the inoculation pipe 321 and mix with the settled sludge in the distribution pipe 322 before being discharged. The water, after filtration, overflows from the filter cavity 3312 and flows into the electrolytic adsorption unit 4.

[0082] When water passes through an electrolytic plate 43 that is energized, an oxidation-reduction reaction occurs, and the impurities precipitated in the water are adsorbed by the adsorbent 431.

[0083] Example 2

[0084] Unlike Example 1, the adsorption component 5 includes four sub-adsorption elements spaced apart from top to bottom; such as Figure 13 As shown, the adsorption belt 51 is provided with a sludge scraping assembly 53 that can contact the sludge storage tank 512; the sludge scraping assembly 53 includes a sludge scraping blade and a mounting rod for mounting the sludge scraping blade.

Claims

1. A combined, high-efficiency device for treating black and odorous water bodies in rural areas, characterized in that, It includes a support frame, and a pretreatment unit (1), an aeration treatment unit (2), a microbial agent dispensing unit (3), an electrolytic adsorption unit (4), and an adsorption assembly (5) located inside the pretreatment unit (1), which are respectively installed on the support frame and connected in sequence; the pretreatment unit (1) includes a pretreatment box (11) fixedly installed on the support frame, and a multi-stage filtration assembly (12) and a slag discharge pipe assembly (13) respectively installed inside the pretreatment box (11); The aeration treatment unit (2) includes an aeration box (21) whose inlet end is connected to the outlet end of the pretreatment box (11), and a rotating component (22) and an aeration component (23) respectively disposed inside the aeration box (21); the microbial agent dispensing unit (3) includes a settling box (31) whose inlet end is connected to the outlet end of the aeration box (21), a microbial agent dispensing component (32) disposed inside the settling box (31), and a filter component (33) disposed inside the settling box (31); The adsorption assembly (5) includes a plurality of sub-adsorption elements spaced apart from top to bottom; each of the plurality of sub-adsorption elements includes a rotating shaft rotatably mounted on the multi-stage filtration assembly (12), an adsorption belt (51) mounted on the rotating shaft and having a plurality of filter holes (510) uniformly arranged on its surface, and a plurality of variable diameter components (52) corresponding to each of the filter holes (510); the adsorption belt (51) has a water-passing cavity (511) for storing adsorption resin inside; The variable diameter assembly (52) includes a mounting base (522) mounted on the adsorption belt (51) and located on the filter hole (510), and a variable diameter disc (521) movably disposed on the mounting base (522); the variable diameter disc (521) includes a baffle (524) movably mounted on the mounting base (522), and a variable diameter rotating ring movably connected to the two baffles (524) respectively by a push rod (523); The mounting base (522) is provided with a limiting block (5221); the variable diameter plate (521) is provided with a limiting groove (5211) that can engage with the limiting block (5221); The adsorption belt (51) is equipped with an electric push rod that can drive the variable diameter rotating ring to rotate; The slag discharge pipe assembly (13) includes a plurality of collection ports (131) arranged one-to-one below the plurality of adsorption belts (51), and slag discharge pipes (132) respectively connected to the plurality of collection ports (131); The surface of the adsorption belt (51) is provided with a mud storage trough (512), and the longitudinal section of the mud storage trough (512) is trapezoidal; The sludge filter assembly (6) includes a filter plate (61) disposed inside the filter chamber (3312) and dividing the filter chamber (3312) into a drainage chamber and a sludge discharge chamber, an auxiliary suction assembly (62) disposed inside the water inlet chamber (3311), and a sludge pushing device (63) located at the bottom of the sludge discharge chamber.

2. The combined high-efficiency treatment device for black and odorous water bodies in rural areas according to claim 1, characterized in that, The multi-stage filtration assembly (12) includes a flocculation assembly (121) disposed inside the pretreatment box (11) by means of a fixing plate, and the adsorption assembly (5) is disposed inside the pretreatment box (11) by means of a fixing plate and located below the flocculation assembly (121). The flocculation assembly (121) includes a rotating shaft (1211) movably disposed on the fixed plate, a filter belt (1212) disposed on the rotating shaft (1211), and a drug injection box (1213) located inside the filter belt (1212). The injection box (1213) includes a storage chamber filled with flocculant and multiple dispensing channels connected to the storage chamber.

3. The combined high-efficiency treatment device for black and odorous water bodies in rural areas according to claim 2, characterized in that, The filter belt (1212) is provided with water filtration holes, and the surface of the filter belt (1212) is provided with a dispersing blade (1214); the dispersing blade (1214) includes a blade body and a guide groove provided in the blade body; The filter assembly (33) includes a filter disc housing (331) disposed inside the static box (31) and a filter mud assembly (6) disposed inside the filter disc housing (331). The filter disc housing (331) includes a filter disc body, an upper plate installed at the upper end of the filter disc body, and a lower plate installed at the lower end of the filter disc body. The filter disc body is provided with a water inlet cavity (3311) inside, and a filter cavity (3312) communicating with the water inlet cavity (3311) is provided inside the filter disc body. The upper plate is provided with a first water passage groove communicating with the filter chamber (3312), and the lower plate is provided with a second water passage groove communicating with the water inlet chamber (3311). The inoculation component (32) is used to inoculate sludge treatment bacteria; the inoculation component (32) includes a distribution pipe (322) disposed on the lower plate, and an inoculation pipe (321) with one end penetrating the upper plate and communicating with the distribution pipe (322); the other end of the inoculation pipe (321) extends to the outside of the settling box (31).

4. The combined high-efficiency treatment device for black and odorous water bodies in rural areas according to claim 1, characterized in that, The adsorption belt (51) is provided with a sludge scraping assembly (53) that can contact the sludge storage tank (512); the sludge scraping assembly (53) includes a sludge scraper and a mounting rod for mounting the sludge scraper.

5. The combined high-efficiency treatment device for black and odorous water bodies in rural areas according to claim 1, characterized in that, The rotating assembly (22) includes a stirring shaft (221) located inside the aeration box (21), a mounting plate (222) disposed on the stirring shaft (221), and a motor for providing power to the stirring shaft (221).

6. The combined high-efficiency treatment device for black and odorous water bodies in rural areas according to claim 1, characterized in that, The aeration assembly (23) includes an aeration disc (231) mounted on a mounting plate (222) and an air source assembly connected to the aeration disc (231).

7. The combined high-efficiency treatment device for black and odorous water bodies in rural areas according to claim 1, characterized in that, The auxiliary suction assembly (62) includes an electric cylinder (622) with its top end set at the top of the auxiliary suction chamber (621), an auxiliary suction plate (623) set at the bottom end of the electric cylinder (622), and an inlet pipe (624) for connecting the water inlet chamber (3311) and the filter chamber (3312); a baffle plate (6241) is provided inside the filter chamber (3312) and above the water inlet pipe (624); The second water channel is provided with a first water inlet valve (6211) for water to enter the water inlet cavity (3311); the auxiliary suction plate (623) is provided with a second water inlet valve for water to enter the upper part of the auxiliary suction plate (623); and the water inlet pipe (624) is provided with a water outlet valve for water to exit.

8. The combined high-efficiency treatment device for black and odorous water bodies in rural areas according to claim 1, characterized in that, The electrolytic adsorption unit (4) includes an electrolytic tank (41) with its inlet end connected to the outlet end of the static tank (31), a base (42) disposed inside the electrolytic tank (41), and multiple electrolytic plates (43) uniformly arranged circumferentially on the base (42); a main outlet pipe (411) is provided on the electrolytic tank (41); each of the multiple electrolytic plates (43) includes a mounting plate, an adsorption element (431) disposed on the mounting plate, and two electrode assemblies respectively disposed on the mounting plate and located on both sides of the adsorption element (431); the adsorption element (431) includes an adsorption chamber shell and graphene oxide solid filled in the adsorption chamber shell; the electrode assembly includes a positive electrode located on one side of the adsorption element (431) and a negative electrode located on the other side of the adsorption element (431).

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