Movable reaction device for sewage treatment

Abstract

The utility model provides a movable reaction device for sewage treatment, which comprises a floating island carrier, a water inlet device and a backwashing device, the floating island carrier is respectively butted with the water inlet device and the backwashing device, at least two buoys are arranged along the periphery of the floating island carrier, and the water inlet device is communicated with the backwashing device. The water inlet device and the backwashing device are fixed on the buoy, a filler assembly is arranged in the floating island carrier, and the filler assembly comprises an aquatic plant layer, a first aerobic filler layer, an anoxic filler layer, an anaerobic filler layer and a second aerobic filler layer which are sequentially arranged from top to bottom. According to the utility model, a plurality of pollutants in sewage are treated, and the backwash of the filler layer is also realized, so that the filler layer is prevented from being blocked.

Description

Technical Field

[0001] The utility model belongs to the technical field of ecological floating islands for water body treatment, and relates to a mobile reaction device for sewage treatment. Background Art

[0002] With the increasing attention paid to the treatment of micro-polluted water bodies by people, how to treat micro-polluted water bodies at low cost and high efficiency has become a research hotspot at home and abroad. Traditional ecological floating island technologies mainly include combined ecological floating islands of "aquatic plants + single soft filler", combined ecological floating islands of "aquatic plants + adsorptive matrix filler", combined ecological floating islands of "aquatic plants + catalytic oxidation type matrix filler + soft filler", etc., which have good water quality purification performance. Ecological floating islands mainly take aquatic plants as the main body, use high molecular materials, etc. as carriers and matrices, make full use of the ecological niche and nutrient niche in the water body space, and establish an artificial ecosystem to reduce the pollution load in the water body.

[0003] CN203668117U discloses a composite ecological floating island, including a floating body, a planting basket, a matrix and a soft filler. The matrix filler is placed inside the planting basket, and small holes are opened in the part of the planting basket located below the floating body. One end of the soft filler is suspended on the bottom surface of the floating body, and a heavy object is fixed at the other end. However, the matrix filler used in it is oyster shells and waste bricks, which cannot provide the electron donor required for denitrification. There is a heavy object hanging at the bottom of the floating body, and the draft level of the floating body is not easy to adjust, and the filler is easy to be blocked.

[0004] CN204265528U discloses an ecological floating island for treating polluted water bodies, including a floating bed, a planting basket and aquatic plants. The planting basket is arranged on the floating bed, and aquatic plants are planted in the planting basket. The contact surface between the floating bed and the water is connected with a three-dimensional immobilized microbial agent adding device, and the contact surface between the floating bed and the water is also connected with a biological elastic three-dimensional filler. However, its matrix filler uses organic waste, and the provided electron donor is organic carbon source, which is easy to cause the COD of the effluent to exceed the standard. Moreover, the three-dimensional dosing method of the immobilized microbial agent is adopted at the lower part of the floating body, which is easy to be blocked, the replacement of the matrix filler is complex, and the construction period is long.

[0005] CN116253436A discloses a movable ecological floating island and a reservoir suitable for the purification of initial rainwater. The ecological floating island includes a floating frame floating on the initial rainwater reservoir. The floating frame is filled with a light filler, and aquatic plants are planted in the light filler. A plurality of flexible ropes are arranged below the floating frame, and a plurality of light fibers are arranged on the surface of the flexible ropes. The bottom of the flexible ropes is fixed to the bottom of the initial rainwater reservoir. However, the bottom of the flexible ropes is fixed to the bottom of the initial rainwater reservoir. During continuous rainfall, the water level of the floating body cannot be adjusted, and the matrix filler cannot be effectively stratified, resulting in the inability to achieve effective nitrification and denitrification reactions in different filler layers.

[0006] CN206538262U discloses an artificial ecological floating island, which includes a bracket. The bracket is provided with a number of floats. Inside the bracket, a carbon fiber membrane layer, a suspended packing layer and a sponge matrix layer are filled in sequence from bottom to top. Aquatic plants are planted in the sponge matrix layer. An aeration port is arranged on the lower side of the carbon fiber membrane layer. A floating drum is installed on the upper bracket, and a bubble generating device and an RTU wireless remote measurement and control terminal device are arranged on the floating drum. However, the entire packing layer is in an aerobic state, which can only remove ammonia nitrogen and total phosphorus, and cannot effectively remove the nitrate nitrogen index. In addition, the packing used has a low porosity and is prone to blockage. Moreover, it adjusts the water level of the floating body by manually adjusting the weight of the loaded sand, resulting in a large manual labor intensity and inability to automatically and remotely adjust the water level of the floating body.

[0007] CN204356147U discloses an artificial ecological floating island for sewage treatment, which adopts a lightweight box body framework. Inside, there is a granular packing layer. A number of lightweight corrugated strip skeletons are fixed on the granular layer. The packing layer is divided into three areas: the upper wave surface, the middle wave surface and the lower wave surface, and activated carbon fiber felts with photocatalytic materials, ordinary activated carbon fiber felts and activated carbon fiber felts loaded with photocatalytic materials are respectively arranged. However, it mainly removes pollutants based on the adsorption principle, is prone to adsorption saturation, needs to be replaced regularly and frequently, and the suspended solids in the water are likely to make the photocatalyst material lose its activity. Moreover, the investment cost is high and it is not convenient for later operation and maintenance.

[0008] Currently, the existing ecological floating islands still have the following problems: (1) The types of pollutants that can be removed are single. The main removal indexes are COD (Chemical Oxygen Demand), ammonia nitrogen, and they cannot effectively remove nitrate nitrogen and total phosphorus in the water body, resulting in high total nitrogen and total phosphorus; (2) The water level of the floating body cannot be effectively and timely adjusted, resulting in the microbial environment being basically in an aerobic environment, and denitrifying bacteria and phosphorus-removing bacteria being inhibited for a long time; (3) The floating body is relatively fixed. When replacing the matrix packing or soft packing, the manual labor intensity is large and the construction period is long; (3) After long-term operation, the packing layer is prone to blockage; (5) The types of packing used in the packing layer are single and cannot provide corresponding microbial electron donors according to different microbial environments. Summary of the Utility Model

[0009] Aiming at the deficiencies of the existing technology, the purpose of the present utility model is to provide a mobile reaction device for sewage treatment. By setting a variety of packing layers in the floating island carrier, a microbial environment of aerobic - anoxic - anaerobic - aerobic with different oxidation-reduction potentials is formed, and backwashing of the packing layer is also realized to avoid blockage of the packing layer.

[0010] To achieve this purpose, the present utility model adopts the following technical solutions:

[0011] The utility model provides a mobile reaction device for sewage treatment. The mobile reaction device includes a floating island carrier, a water inlet device and a backwashing device. The floating island carrier is respectively connected to the water inlet device and the backwashing device. At least two floating cylinders are arranged along the outer periphery of the floating island carrier. The water inlet device and the backwashing device are fixed on the floating cylinders. A packing component is arranged in the floating island carrier. The packing component includes an aquatic plant layer, a first aerobic packing layer, an anoxic packing layer, an anaerobic packing layer and a second aerobic packing layer which are arranged in sequence from top to bottom.

[0012] In the utility model, different types of packing layers are arranged in the floating island carrier to form an aerobic-anoxic-anaerobic-aerobic microbial environment, so as to provide different microbial electron donors, realize the removal of various pollutants, especially the removal of nitrate nitrogen in sewage; by using the water absorption and drainage of the floating cylinders, the buoyancy is adjusted, and then the floating island carrier is controlled to rise or dive; a backwashing device is also arranged to avoid the blockage of the packing layer, and the packing replacement is convenient, and the labor cost is low.

[0013] As a preferred technical solution of the utility model, the first aerobic packing layer is a soil layer, the anoxic packing layer is a ceramsite packing layer, the anaerobic packing layer is a denitrification packing layer, and the second aerobic packing layer is a volcanic rock packing layer.

[0014] The soil layer in the utility model is used for planting aquatic plants; the surface of the packing in the ceramsite packing layer is attached with autotrophic nitrifying bacteria, which has good biofilm hanging and plant root growth performance, converts ammonia nitrogen in sewage into nitrate nitrogen, can also enrich phosphorus and organic matter in sewage, and removes them through the absorption of the plant roots in the aquatic plant layer; the denitrification packing layer is used to provide autotrophic denitrifying bacteria to promote the conversion of nitrate nitrogen into nitrogen gas; the volcanic rock packing layer is used to intercept the loss of sludge and provide more biofilm hanging areas for other microorganisms, and further adsorb trace pollutants in sewage, such as heavy metals, anionic surfactants, organic acids, etc.

[0015] As a preferred technical solution of the utility model, the thicknesses of the first aerobic packing layer, the anoxic packing layer, the anaerobic packing layer and the second aerobic packing layer are different from each other.

[0016] By arranging different types of packing layers with different thicknesses, the utility model forms an aerobic-anoxic-anaerobic-aerobic microbial environment to realize the removal of COD, ammonia nitrogen, nitrate nitrogen and total phosphorus in sewage.

[0017] As a preferred technical solution of the utility model, a first pressure detection component is arranged at the water inlet end of the floating island carrier, and a second pressure detection component is arranged at the water outlet end of the floating island carrier.

[0018] The backwashing device is electrically connected to the first pressure detection component and the second pressure detection component respectively.

[0019] During the application of the present utility model, sewage enters from the water inlet end at the top of the floating island carrier, and after passing through each packing layer of the packing component in sequence, it flows out from the water outlet end at the bottom of the floating island carrier. The present utility model uses the first pressure detection component and the second pressure detection component to detect the pressures at the water inlet end and the water outlet end respectively, and electrically connects them to the backwashing device, which is used to backwash the packing component according to the pressure conditions at the water inlet end and the water outlet end, so as to solve the problem of blockage of the packing layer.

[0020] As a preferred technical solution of the present utility model, the backwashing device includes at least one backwashing pipeline, the backwashing pipeline is connected to the bottom of the floating island carrier, a first driving pump is arranged on the backwashing pipeline, and the first driving pump is fixed on the floating drum.

[0021] As a preferred technical solution of the present utility model, a water distribution pipe is arranged at the bottom of the floating island carrier, and the water distribution pipe is connected to the backwashing pipeline.

[0022] As a preferred technical solution of the present utility model, the water inlet device includes at least one spraying component, the water outlet of the spraying component is arranged above the floating island carrier for spraying the packing component, and a second driving pump is arranged on the spraying component, and the second driving pump is fixed on the floating drum.

[0023] As a preferred technical solution of the present utility model, the spraying component includes at least one spraying pipe, and a spray head is arranged at the water outlet of the spraying pipe.

[0024] Both the water inlet device and the water outlet device in the present utility model are arranged on the floating drum. By adjusting the water absorption and drainage of the floating drum, the water level of the pool water of the floating island carrier is controlled, so as to realize the environmental conditions of aerobic - anoxic - anaerobic - aerobic, achieve a microbial environment with different redox potentials, and improve the treatment effect of various pollutants in the sewage.

[0025] As a preferred technical solution of the present utility model, the mobile reaction device further includes a water power regulation device, the water power regulation device includes a controller, a solar energy component and a driving component, the controller is electrically connected to the solar energy component and the driving component respectively, the solar energy component includes at least one solar panel fixed on the top of the floating island carrier for providing power to the driving component, and the driving component is used to drive the floating island carrier to move.

[0026] In the present utility model, by setting up a hydrodynamic control device, the floating island carrier can be remotely controlled to dock at the shore, reducing the manual labor intensity and facilitating the disassembly, replacement and installation of the packing. When sunlight shines on the solar panel, a voltage difference is formed on the surface, and an electric current is generated through an external circuit to convert electrical energy into mechanical energy, so as to provide power for the driving component. It should be noted that the solar energy component also includes auxiliary components, connecting wires, external power sources, etc. commonly used in the art for converting electrical energy into mechanical energy, but the above components do not belong to the improvement points of the present utility model and are not specifically defined herein.

[0027] As a preferred technical solution of the present utility model, the floating island carrier has a boat-shaped structure.

[0028] The present utility model adopts a floating island carrier with a boat-shaped structure and is equipped with multiple floating barrels to adjust the buoyancy, ensuring that the floating island carrier can stably float on the water surface.

[0029] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0030] A mobile reaction device for sewage treatment provided by the present utility model sets different types of packing layers in the floating island carrier to form an aerobic-anoxic-anaerobic-aerobic microbial environment, so as to provide different microbial electron donors to remove various pollutants in the sewage. At the same time, a backwashing device is set to solve the problem of blockage of the packing layer, and the packing is convenient to replace with low labor cost. Description of the Drawings

[0031] Figure 1 It is the top view of the mobile reaction device for sewage treatment provided in Embodiment 1 of the present utility model;

[0032] Figure 2 It is the front view of the mobile reaction device for sewage treatment provided in Embodiment 1 of the present utility model.

[0033] Wherein, 1 - floating island carrier; 2 - packing assembly; 3 - floating barrel; 4 - nozzle; 5 - second driving pump; 51 - spraying assembly; 6 - first driving pump; 61 - backwashing pipeline; 7 - solar panel; 8 - soil layer; 9 - ceramsite packing layer; 10 - denitrifying packing layer; 11 - volcanic rock packing layer; 12 - water distribution pipe; 13 - aquatic plant. Detailed Embodiments

[0034] It should be understood that in the description of the present utility model, the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0035] It should be noted that in the description of the present utility model, unless otherwise clearly specified and limited, the terms "set", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific circumstances.

[0036] Those skilled in the art should understand that the present utility model necessarily includes necessary pipelines, conventional valves and general pump equipment for realizing the complete process. However, the above contents do not belong to the main improvement points of the present utility model. Those skilled in the art can add and arrange them by themselves based on the process flow and equipment structure selection. The present utility model does not have special requirements and specific limitations on this.

[0037] The technical solution of the present utility model will be further described below with reference to the drawings and through specific embodiments.

[0038] The present utility model provides a mobile reaction device for sewage treatment, including a floating island carrier, a water inlet device and a backwashing device. The floating island carrier is respectively connected to the water inlet device and the backwashing device. At least two floating barrels are arranged along the outer periphery of the floating island carrier. The water inlet device and the backwashing device are fixed on the floating barrels. A packing component is arranged inside the floating island carrier. The packing component includes an aquatic plant layer, a first aerobic packing layer, an anoxic packing layer, an anaerobic packing layer and a second aerobic packing layer which are arranged in sequence from top to bottom. A microbial environment of aerobic - anoxic - anaerobic - aerobic is formed in the packing component of the present utility model to provide different microbial electron donors, realizing the removal of various pollutants in sewage.

[0039] Specifically, the floating island carrier has a boat-shaped structure and is configured with a plurality of floating barrels to adjust the buoyancy, ensuring that the floating island carrier can stably float on the water surface.

[0040] Specifically, the aquatic plants in the aquatic plant layer include but are not limited to cattail, reed, banana, straw, etc.

[0041] In some embodiments, the thicknesses of the first aerobic filler layer, anoxic filler layer, anaerobic filler layer, and second aerobic filler layer are different from each other, forming an aerobic-anoxic-anaerobic-aerobic microbial environment to achieve the removal of COD, ammonia nitrogen, nitrate nitrogen, and total phosphorus in the sewage.

[0042] In some embodiments, the first aerobic filler layer is a soil layer, the anoxic filler layer is a ceramsite filler layer, the anaerobic filler layer is a denitrification filler layer, and the second aerobic filler layer is a volcanic rock filler layer. The soil layer is used for growing aquatic plants. The filler of the ceramsite filler layer is fired from kaolin and other auxiliary materials commonly used by those skilled in the art, and has good biofilm attachment and plant root growth performance. With the effect of drop aeration, ammonia nitrogen in the sewage is converted into nitrate nitrogen by autotrophic nitrifying bacteria attached to the surface of the filler. At the same time, through the rich iron, aluminum, calcium, magnesium and other elements in the filler, the enrichment of phosphorus and organic matter in the sewage is realized, and the removal is achieved through the absorption of plant roots. The denitrification filler layer uses the sulfur-iron autotrophic denitrification filler well-known to those skilled in the art, which is composed of elemental sulfur, siderite and other auxiliary materials, and replaces the artificial carbon source addition through the natural slow release of the filler. Elemental sulfur is used as an electron donor, and bacteria obtain energy by oxidizing elemental sulfur. Siderite provides electrons and inorganic carbon sources during the oxidation process, thereby promoting the conversion of nitrate nitrogen into nitrogen gas. The volcanic rock filler layer is mainly composed of volcanic rock, activated carbon and zeolite. As the bottom filler, it intercepts the sludge loss of the upper active filler and provides more biofilm attachment area for other microorganisms, further adsorbing trace pollutants such as heavy metals, anionic surfactants and organic acids in the sewage. First, aquatic plants absorb part of the ammonia nitrogen and total phosphorus in the water under aerobic conditions in the soil layer; the water body continues to flow to the ceramsite filler layer, and under aerobic conditions, nitrifying bacteria in the ceramsite filler layer convert ammonia nitrogen into nitrate nitrogen; the water body containing nitrate nitrogen flows through the sulfur-iron autotrophic denitrification filler layer. Under anoxic conditions, sulfur autotrophic denitrifying bacteria use the sulfur-iron autotrophic denitrification filler as an electron donor to convert nitrate nitrogen into nitrogen gas to achieve the purpose of removing nitrate nitrogen in the water; secondly, the water body flows through the upper volcanic rock filler layer, showing anaerobic conditions, and the total phosphorus index is removed by using the adsorption of the volcanic rock filler. At the same time, under anaerobic conditions, ATP (adenosine triphosphate) in anaerobic polyphosphate-accumulating bacteria is hydrolyzed to release H 3 PO 4It releases phosphorus by acting as energy. The lower volcanic rock filler layer near the water body is in an aerobic condition, and the total phosphorus in the water is removed under the action of aerobic phosphorus-accumulating bacteria.

[0043] In some embodiments, a first pressure detection component is provided at the water inlet end of the floating island carrier, and a second pressure detection component is provided at the water outlet end of the floating island carrier. The backwashing device is electrically connected to the first pressure detection component and the second pressure detection component respectively. During the application process, sewage enters from the water inlet end at the top of the floating island carrier, and after passing through each filler layer of the filler component in sequence, it flows out from the water outlet end at the bottom of the floating island carrier. The utility model uses the first pressure detection component and the second pressure detection component to detect the pressures at the water inlet end and the water outlet end respectively, and electrically connects them to the backwashing device, which is used to backwash the filler component according to the pressure conditions at the water inlet end and the water outlet end, so as to solve the problem of blockage of the filler layer.

[0044] Specifically, the backwashing device can automatically start backwashing according to the pressure difference between the water inlet end and the water outlet end of the floating island carrier. Those skilled in the art can adjust the set pressure difference according to the situation of the filler layer, the nature of pollutants, the nature of sewage and the treatment requirements, etc. Exemplarily, the pressure at the water inlet end of the floating island carrier is denoted as P 1 and the pressure at the water outlet end of the floating island carrier is denoted as P 2 When P 1 - P 2 ≥ 0.02 Mpa, the backwashing device automatically starts to backwash the filling component, and the backwashing adopts single water washing, the water washing time is 5 - 10 min, and the water washing intensity is 10 L / (m 2 ·s).

[0045] In some embodiments, the backwashing device includes at least one backwashing pipeline, the backwashing pipeline is connected to the bottom of the floating island carrier, and a first driving pump is provided on the backwashing pipeline, and the first driving pump is fixed on the floating drum. Specifically, a water distribution pipe is provided at the bottom of the floating island carrier, and the water distribution pipe is connected to the backwashing pipeline.

[0046] In some embodiments, the water inlet device includes at least one spraying component, the water outlet of the spraying component is arranged above the floating island carrier for spraying the filler component, and a second driving pump is provided on the spraying component, and the second driving pump is fixed on the floating drum. Specifically, the spraying component includes at least one spraying pipe, and a nozzle is provided at the water outlet of the spraying pipe.

[0047] In the present utility model, both the water inlet device and the water outlet device are arranged on the floating drum. By adjusting the water absorption and drainage of the floating drum, the water level of the pool water of the floating island carrier is controlled. Necessary connecting pipelines and switch control valves are also provided between the backwashing device and the water inlet device. The present utility model does not make special limitations on this. Those skilled in the art need to reasonably adjust, add or delete according to actual production needs. It should be clear that new technical solutions generated by conventional technical means that are common and well-known to those skilled in the art, such as deleting some unnecessary connecting pipelines and switch control valves, or replacing single-function switch control valves with multi-functional integrated control valves, or providing an automatic control system electrically connected to the switch control valve to control the opening of corresponding valves, also fall within the scope of disclosure and protection of the present utility model.

[0048] The present utility model also provides a feasible solution for arranging necessary pipelines, which specifically includes:

[0049] (1) The backwashing device further includes a first water inlet branch pipe. One end of the first water inlet branch pipe is connected to the backwashing pipeline through a first driving pump, and the other end directly extends into the water body. The first driving pump pumps the backwashing water into the backwashing pipeline through the first water inlet branch pipe, and performs backwashing from the bottom of the floating island carrier.

[0050] (2) The spraying assembly of the water inlet pipeline further includes a second water inlet branch pipe and a spraying main pipe. The second water inlet branch pipe and the spraying main pipe are respectively connected to the water inlet end and the water outlet end of the second driving pump. One end of the second water inlet branch pipe far from the second driving pump directly extends into the water body. The second driving pump pumps the sewage into the spraying main pipe through the second water inlet branch pipe, and the outlets of the spraying main pipe are respectively connected to spraying pipes for water inlet distribution.

[0051] In some embodiments, the mobile reaction device further includes a hydrodynamic control device, which includes a controller, a solar energy component, and a driving component. The controller is electrically connected to the solar energy component and the driving component respectively. The solar energy component includes at least one solar panel fixed on the top of the floating island carrier. The solar energy component is used to provide power to the driving component, and the driving component is used to drive the floating island carrier to move. In the present invention, by setting the hydrodynamic control device, the floating island carrier can be remotely controlled to dock at the shore, reducing the manual labor intensity and facilitating the disassembly, replacement, and installation of the filler. When sunlight shines on the solar panel, a voltage difference is formed on the surface, and an electric current is generated through an external circuit to convert electrical energy into mechanical energy, thereby providing power to the driving component. The controller adopts a programmable logic controller and is electrically connected to the solar energy component and the driving component by means commonly known and publicly known to those skilled in the art to achieve remote intelligent control. The solar energy component further includes auxiliary components, connection wires, external power sources, etc. that are commonly known and publicly known to those skilled in the art and are necessary for converting electrical energy into mechanical energy. However, the above components are not the improvement points of the present invention, and no specific limitations are made thereto. The driving component of the present invention is a power device that drives the floating island carrier to move based on mechanical energy. The present invention does not make special limitations thereto, and mechanical power components well-known to those skilled in the art can be used, including but not limited to necessary transmission components, power pipelines, motors, propellers, etc. Those skilled in the art need to reasonably adjust, add, or delete according to actual production needs.

[0052] Embodiment 1

[0053] This embodiment provides a mobile reaction device for sewage treatment, which includes a floating island carrier 1, a water inlet device, a backwashing device, and a hydrodynamic control device. The floating island carrier 1 is respectively connected to the water inlet device and the backwashing device. As Figure 1 shown, the floating island carrier 1 has a ship-shaped structure, and four floating cylinders 3 are arranged along the outer periphery of the floating island carrier 1. As Figure 2As shown in the figure, a packing component 2 is arranged inside the floating island carrier 1. The packing component 2 includes an aquatic plant layer 13, a soil layer 8, a ceramsite packing layer 9, a denitrification packing layer 10, and a volcanic rock packing layer 11 which are arranged in sequence from top to bottom. The thicknesses of the soil layer 8, the ceramsite packing layer 9, the denitrification packing layer 10, and the volcanic rock packing layer 11 are different from each other. The thickness of the soil layer 8 is 0.2 m, the thickness of the ceramsite packing layer 9 is 0.5 m, the thickness of the denitrification packing layer 10 is 1.5 m, and the thickness of the volcanic rock packing layer 11 is 0.8 m. The soil layer 8 is used for planting aquatic plants 13. Autotrophic nitrifying bacteria are attached to the surface of the packing in the ceramsite packing layer 9. The denitrification packing layer 10 uses sulfur-iron autotrophic denitrification packing. The volcanic rock packing layer 11 is mainly composed of volcanic rock, activated carbon, and zeolite. The backwashing device includes four backwashing pipelines 61, which correspond to the floating barrels 3 one by one. A first driving pump 6 is independently arranged on each backwashing pipeline 61, and the first driving pump 6 is fixed on the floating barrel 3. A water distribution pipe 12 is arranged at the bottom of the floating island carrier 1, and the water distribution pipe 12 is respectively communicated with the backwashing pipelines 61. A first pressure detection component is arranged at the water inlet end of the floating island carrier 1, and a second pressure detection component is arranged at the water outlet end. The first driving pump 6 is respectively electrically connected to the first pressure detection component and the second pressure detection component. The first driving pump 6 automatically starts for backwashing according to the pressure conditions detected by the first pressure detection component and the second pressure detection component. The water inlet device includes four spraying components 51, which correspond to the floating barrels 3 one by one. A second driving pump 5 is independently arranged on each spraying component 51, and the second driving pump 5 is fixed on the floating barrel 3. The water outlet of the spraying component 51 is located above the floating island carrier 1. Each spraying component 51 includes two spraying pipes arranged side by side, and nozzles 4 are arranged at the water outlets of the spraying pipes for spraying the packing component 2. The hydrodynamic regulation device includes a controller, a solar energy component, and a driving component. The controller is respectively electrically connected to the solar energy component and the driving component. The solar energy component includes two solar panels 7 fixed on the top of the floating island carrier 1 for providing power to the driving component. The driving component is used to drive the floating island carrier 1 to move. Using solar power, the operating energy consumption is low.

[0054] Example 2

[0055] This embodiment provides a mobile reaction device for sewage treatment. The difference from Example 1 is that: the thickness of the soil layer 8 in the packing component 2 is 0.2 m, the thickness of the ceramsite packing layer 9 is 1 m, the thickness of the denitrification packing layer 10 is 1.2 m, and the thickness of the volcanic rock packing layer 11 is 0.8 m. The rest of the structure is the same as that of Example 1.

[0056] Example 3

[0057] This embodiment provides a mobile reaction device for sewage treatment, which is different from that of Embodiment 1 in that: the thickness of the soil layer 8 in the packing component 2 is 0.2 m, the thickness of the ceramsite packing layer 9 is 0.3 m, the thickness of the denitrifying packing layer 10 is 1 m, and the thickness of the volcanic rock packing layer 11 is 0.8 m. The rest of the structure is the same as that of Embodiment 1.

[0058] Application Example 1

[0059] This application example uses the mobile reaction device for sewage treatment provided in Embodiment 1 to carry out basin treatment on the reservoir water body. The pollutant contents in the reservoir water body are as follows: the COD concentration is 15 mg / L, the ammonia nitrogen concentration is 5 mg / L, the nitrate nitrogen concentration is 10 mg / L, the TN concentration is 25 mg / L, and the TP is 3 mg / L. The specific treatment process includes:

[0060] Start the second driving pump 5 to lift the wastewater above the floating island carrier 1 and evenly spray it on the packing component 2 through the nozzle 4. The flow rate of the nozzle 4 is controlled at 3 - 4 m / s. The wastewater first undergoes photosynthesis by the plants in the aquatic plant layer 13 to remove part of the nitrogen and phosphorus. The aquatic plants 13 mainly include cattail, reed, banana, etc., and the dissolved oxygen is 3 - 4 mg / L; then it flows to the ceramsite packing layer 9. The ceramsite particle size is 5 - 10 mm, the filtration rate is controlled at 2 - 3 m / h, the empty bed hydraulic retention time is 10 - 15 min, the dissolved oxygen is 2 - 2.5 mg / L. The nitrifying bacteria attached to the ceramsite packing layer 9 are used to convert ammonia nitrogen in the wastewater into nitrate nitrogen under aerobic conditions; the wastewater treated by the nitrifying bacteria flows to the denitrifying packing layer 10. The sulfur-iron autotrophic denitrifying packing particle size is 3 - 5 mm, the filtration rate is controlled at 1.5 - 2 m / h, the empty bed hydraulic retention time is 45 - 60 min, the dissolved oxygen is 0.5 - 1.0 mg / L. The sulfur autotrophic denitrifying bacteria use the sulfur-iron packing as the microbial electron donor to convert nitrate nitrogen in the wastewater into nitrogen gas under anoxic conditions; finally, the wastewater flows to the volcanic rock packing layer 11. The packing particle size is 30 - 50 mm, the filtration rate is controlled at 8 - 10 m / h, the empty bed hydraulic retention time is 4.8 - 6 min, the dissolved oxygen in the upper volcanic rock packing layer 11 is 0 - 0.5 mg / L, and the dissolved oxygen in the bottom volcanic rock packing layer 11 is 1.5 - 2 mg / L. The upper volcanic rock packing utilizes the adsorption function of the volcanic rock itself and the phosphorus release effect of anaerobic polyphosphate-accumulating bacteria, while the bottom volcanic rock packing layer 11 has aerobic polyphosphate-accumulating bacteria to achieve the phosphorus-accumulating function and the purpose of removing total phosphorus. When the pressure difference between the inlet end pressure P 1 and the outlet end pressure P 2 exceeds 0.02 Mpa, start the first driving pump 6 to automatically backwash once. The backwash time is 10 min, and the backwash intensity is 10 L / (m 2 ·s).

[0061] After treatment by the above-mentioned mobile reaction device, the final effluent pollutant concentrations are as follows: the COD concentration is 5 mg / L, the ammonia nitrogen concentration is 2 mg / L, the nitrate nitrogen concentration is 3 mg / L, the TN is 5 mg / L, and the TP is 1 mg / L.

[0062] Application Example 2

[0063] In this application example, the mobile reaction device for sewage treatment provided in Example 2 is used to perform basin treatment on the reservoir water body. The pollutant contents in the reservoir water body are as follows: the COD concentration is 10 mg / L, the ammonia nitrogen concentration is 2 mg / L, the nitrate nitrogen concentration is 5 mg / L, the TN concentration is 7 mg / L, and the TP is 3 mg / L. The specific treatment process includes:

[0064] Start the second drive pump 5 to lift the wastewater above the floating island carrier 1 and evenly spray it on the packing component 2 through the nozzle 4. The flow rate of the nozzle 4 is controlled at 3 - 4 m / s. The wastewater first undergoes photosynthesis by the plants in the 13 layers of aquatic plants to remove part of the nitrogen and phosphorus. The main aquatic plants 13 are cattail, reed, banana, etc., and the dissolved oxygen is 3 - 4 mg / L; then it flows to the ceramsite packing layer 9. The ceramsite particle size is 5 - 10 mm, the filtration rate is controlled at 2 - 3 m / h, the empty bed hydraulic retention time is 10 - 15 min, the dissolved oxygen is 2 - 2.5 mg / L. The nitrifying bacteria attached to the ceramsite packing layer 9 are used to convert ammonia nitrogen in the wastewater into nitrate nitrogen under aerobic conditions; the wastewater treated by the nitrifying bacteria flows to the denitrifying packing layer 10. The particle size of the sulfur-iron autotrophic denitrifying packing is 3 - 5 mm, the filtration rate is controlled at 3 - 4 m / h, the empty bed hydraulic retention time is 22.5 - 30 min, the dissolved oxygen is 0.5 - 1.0 mg / L. The sulfur autotrophic denitrifying bacteria use the sulfur-iron packing as the microbial electron donor to convert nitrate nitrogen in the wastewater into nitrogen gas under anoxic conditions; finally, the wastewater flows to the volcanic rock packing layer 11. The packing particle size is 30 - 50 mm, the filtration rate is controlled at 8 - 10 m / h, the empty bed hydraulic retention time is 4.8 - 6 min. The dissolved oxygen in the upper volcanic rock packing layer 11 is 0 - 0.5 mg / L, and the dissolved oxygen in the bottom volcanic rock packing layer 11 is 1.5 - 2 mg / L. The upper volcanic rock packing utilizes the adsorption function of the volcanic rock itself and the phosphorus release effect of anaerobic polyphosphate-accumulating bacteria, while the bottom volcanic rock packing layer 11 has aerobic polyphosphate-accumulating bacteria to achieve the phosphorus-accumulating function and the purpose of removing total phosphorus. When the difference between the pressure P 1 at the water inlet end and the pressure P 2 at the water outlet end of the entire floating island carrier 1 exceeds 0.02 Mpa, start the first drive pump 6 to perform an automatic backwash once. The backwash time is 10 min, and the backwash intensity is 10 L / (m 2 ·s).

[0065] After being treated by the above-mentioned mobile reaction device, the final effluent pollutant concentrations are as follows: the COD concentration is 5 mg / L, the ammonia nitrogen concentration is 1 mg / L, the nitrate nitrogen concentration is 2 mg / L, the TN is 3 mg / L, and the TP is 0.5 mg / L.

[0066] Application Example 3

[0067] In this application example, the mobile reaction device for sewage treatment provided in Example 3 is used to conduct basin treatment on the reservoir water body. The pollutant contents in the reservoir water body are as follows: the COD concentration is 5 mg / L, the ammonia nitrogen concentration is 1 mg / L, the nitrate nitrogen concentration is 2 mg / L, the TN concentration is 3 mg / L, and the TP is 1 mg / L. The specific treatment process includes:

[0068] Start the second drive pump 5 to lift the wastewater above the floating island carrier 1 and evenly spray it on the packing component 2 through the nozzle 4. The flow rate of the nozzle 4 is controlled at 3 - 4 m / s. The wastewater first undergoes photosynthesis by the plants in the 13 layers of aquatic plants to remove part of the nitrogen and phosphorus. The main aquatic plants 13 are cattail, reed, banana, etc., and the dissolved oxygen is 3 - 4 mg / L; then it flows to the ceramsite packing layer 9. The ceramsite particle size is 5 - 10 mm, the filtration rate is controlled at 2 - 3 m / h, the empty bed hydraulic retention time is 6 - 9 min, the dissolved oxygen is 2 - 2.5 mg / L, and the nitrifying bacteria attached to the ceramsite packing layer 9 are used to convert ammonia nitrogen in the wastewater into nitrate nitrogen under aerobic conditions; the wastewater treated by the nitrifying bacteria flows to the denitrifying packing layer 10. The particle size of the sulfur-iron autotrophic denitrifying packing is 3 - 5 mm, the filtration rate is controlled at 3 - 4 m / h, the empty bed hydraulic retention time is 15 - 20 min, the dissolved oxygen is 0.5 - 1.0 mg / L, and the sulfur autotrophic denitrifying bacteria use the sulfur-iron packing as the microbial electron donor to convert nitrate nitrogen in the wastewater into nitrogen gas under anoxic conditions; finally, the wastewater flows to the volcanic rock packing layer 11. The packing particle size is 30 - 50 mm, the filtration rate is controlled at 8 - 10 m / h, the empty bed hydraulic retention time is 4.8 - 6 min, the dissolved oxygen in the upper volcanic rock packing layer 11 is 0 - 0.5 mg / L, the dissolved oxygen in the bottom volcanic rock packing layer 11 is 1.5 - 2 mg / L. The upper volcanic rock packing utilizes the adsorption function of the volcanic rock itself and the phosphorus release effect of anaerobic polyphosphate-accumulating bacteria, while the bottom volcanic rock packing layer 11 has aerobic polyphosphate-accumulating bacteria to achieve the phosphorus-accumulating function and the purpose of removing total phosphorus. When the pressure difference between the inlet end and the outlet end of the entire floating island carrier 1 1 and the pressure P 2 exceeds 0.02 Mpa, start the first drive pump 6 to conduct an automatic backwash once. The backwash time is 10 min, and the backwash intensity is 10 L / (m 2 ·s).

[0069] After being treated by the above-mentioned mobile reaction device, the final effluent pollutant concentrations are as follows: the COD concentration is 3 mg / L, the ammonia nitrogen concentration is 0.5 mg / L, the nitrate nitrogen concentration is 1 mg / L, the TN is 1.5 mg / L, and the TP is 0.5 mg / L.

[0070] The mobile reaction device for sewage treatment in the present utility model makes full use of the adjustable water level of the floating drum, fills different packing layers with different thicknesses in the floating island carrier to form a microbial environment with different redox potentials, and realizes the removal of various pollutants in the sewage; it is equipped with an automatic backwashing device, which realizes automatic backwashing when the pressure difference between the inlet end and the outlet end of the packing layer exceeds a certain value, ensures the smooth water flow from top to bottom in the packing layer, and avoids blockage; by setting a hydrodynamic regulation device, when the packing needs to be replaced, the remote-controlled floating island carrier can be moved to the shore to facilitate the disassembly and installation of the packing.

[0071] The applicant declares that the above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model fall within the protection scope and the disclosure scope of the present utility model.

Claims

1. A mobile reaction device for sewage treatment, characterized in that: The mobile reaction device includes a floating island carrier, a water inlet device and a backwashing device. The floating island carrier is connected to the water inlet device and the backwashing device respectively. At least two buoys are arranged along the outer periphery of the floating island carrier. The water inlet device and the backwashing device are fixed on the buoys. A filler assembly is arranged in the floating island carrier. The filler assembly includes an aquatic plant layer, a first aerobic filler layer, an anoxic filler layer, an anaerobic filler layer and a second aerobic filler layer arranged in sequence from top to bottom.

2. The mobile reaction device for sewage treatment according to claim 1, characterized in that: The first aerobic filler layer is a soil layer, the anoxic filler layer is a ceramsite filler layer, the anaerobic filler layer is a denitrification filler layer, and the second aerobic filler layer is a volcanic rock filler layer.

3. The mobile reaction device for sewage treatment according to claim 1, characterized in that: The thicknesses of the first aerobic filler layer, the anoxic filler layer, the anaerobic filler layer and the second aerobic filler layer are different from each other.

4. The mobile reaction device for sewage treatment according to claim 1, characterized in that: The water inlet end of the floating island carrier is provided with a first pressure detection component, and the water outlet end of the floating island carrier is provided with a second pressure detection component; The backwash device is electrically connected to the first pressure detection component and the second pressure detection component respectively.

5. The mobile reaction device for sewage treatment according to claim 1, characterized in that: The backwashing device comprises at least one backwashing pipe, and the backwashing pipe is connected to the bottom of the floating island carrier; The backwash pipeline is provided with a first driving pump, and the first driving pump is fixed on the buoy.

6. The mobile reaction device for sewage treatment according to claim 5, characterized in that: A water distribution pipe is provided at the bottom of the floating island carrier, and the water distribution pipe is connected to the backwashing pipeline.

7. The mobile reaction device for sewage treatment according to claim 1, characterized in that: The water inlet device includes at least one spray assembly, the water outlet of the spray assembly is arranged above the floating island carrier, and is used to spray the filler assembly; The spray assembly is provided with a second driving pump, and the second driving pump is fixed on the buoy.

8. The mobile reaction device for sewage treatment according to claim 7, characterized in that: The spray assembly comprises at least one spray pipe, and a spray head is arranged at the water outlet of the spray pipe.

9. The mobile reaction device for sewage treatment according to claim 1, characterized in that: The mobile reaction device also includes a hydrodynamic control device; The hydrodynamic control device comprises a controller, a solar energy component and a driving component, wherein the controller is electrically connected to the solar energy component and the driving component respectively; The solar energy component includes at least one solar panel fixed on the top of the floating island carrier, which is used to provide power to the driving component, and the driving component is used to drive the floating island carrier to move.

10. The mobile reaction device for sewage treatment according to claim 1, characterized in that: The floating island carrier is in a ship-shaped structure.

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