In-situ treatment system for black and odorous water body

Abstract

This invention relates to an in-situ treatment system for black and odorous water bodies, comprising a floating island processor, a drive unit, and a photovoltaic unit. The drive unit propels the floating island processor along a ditch, and the photovoltaic unit, located above the floating island processor, utilizes solar energy to power the energy-consuming equipment of the floating island processor. The floating island processor comprises, from top to bottom, a vegetation layer, a sludge storage layer, and a biochemical treatment layer. The biochemical treatment layer comprises, from front to back, a passivation unit, an anaerobic unit, an aerobic unit, and an anoxic unit. The passivation unit includes a disturbance unit and a dosing pipe. The dosing pipe is used to introduce passivating agent into the ditch bottom, and the disturbance unit is used to loosen the sludge at the bottom of the ditch. The anaerobic unit contains several rotatable first load bodies, with a first stirrer between adjacent first load bodies. The aerobic unit contains several rotatable second load bodies, with a second stirrer between adjacent second load bodies. The anoxic unit contains several rotatable third load bodies, with a third stirrer between adjacent third load bodies.

Description

Technical Field

[0001] This invention belongs to the field of black and odorous ditch treatment technology, specifically involving an in-situ treatment system for black and odorous water bodies. Background Technology

[0002] Black and odorous water is an extreme manifestation of organic pollution in water bodies. The water body is in an anaerobic state, with putrefactive bacteria proliferating. The water body's physicochemical properties are highly reducing, making it unsuitable for aquatic life. Aquatic vegetation degrades or even becomes extinct, with only a small number of pollution-tolerant phytoplankton, zooplankton, and benthic animals surviving. This leads to the breakdown of the food chain, the fragmentation of the food web, water pollution, and a severe imbalance in the structure of the aquatic ecosystem and water environment system, resulting in severe degradation or even loss of function.

[0003] Black and odorous water bodies are prevalent in rural areas, manifesting as polluted ditches. They are characterized by scattered distribution, lack of pipe networks, strong non-point source pollution, thick sediment buildup, severe anaerobic pollution, and weak maintenance capabilities, making them significantly more difficult to treat than urban rivers. Current technologies primarily involve dredging the sludge and pumping out the wastewater from the ditches, transporting it to specialized wastewater treatment plants for further processing, and finally obtaining filtered sludge for use in the construction industry or landfill. These methods have the following drawbacks: ex-situ treatment requires pumping, dredging, and transportation, damaging the original ecosystem, resulting in high costs and a high risk of secondary pollution. Existing in-situ treatment technologies typically only improve surface water quality, failing to address endogenous pollution in the sediment, leading to water quality rebound; there is no resource recovery pathway, and plant debris, algae, and organic suspended solids decompose and re-pollute the water body. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides an in-situ treatment system for black and odorous water bodies, comprising a floating island processor, a drive unit, and a photovoltaic unit. The drive unit is used to move the floating island processor along the black and odorous ditch, and the photovoltaic unit is located above the floating island processor and can use solar energy to power the energy-consuming equipment of the floating island processor.

[0005] The floating island processor comprises, from top to bottom, a vegetation layer, a silt storage layer, and a biochemical treatment layer; the biochemical treatment layer comprises, from front to back, a passivation unit, an anaerobic unit, an aerobic unit, and an anoxic unit; the passivation unit comprises several rotatable agitators and at least one dosing pipe, the dosing pipe being used to input passivating agent into the bottom of the ditch, and the agitators being used to loosen the silt at the bottom of the ditch, so that the silt and the passivating agent can be in full contact;

[0006] The anaerobic unit is equipped with several rotatable first load bodies, and a first agitator is provided between adjacent first load bodies to agitate the sludge in the anaerobic unit and prevent the sludge from settling to the bottom. Along the length of the anaerobic unit, the rotation speed of the several first agitators gradually decreases, which is conducive to the settling of the sludge at the tail of the anaerobic unit. The treated sludge is then fed into the aerobic unit through the first sludge conveying section.

[0007] The aerobic unit is equipped with several rotatable second load bodies, and a second agitator is provided between adjacent second load bodies to agitate the sludge in the aerobic unit and prevent the sludge from settling to the bottom. Along the length of the aerobic unit, the rotation speed of the several second agitators gradually decreases, which is conducive to the settling of the sludge at the tail of the aerobic unit. The treated sludge is then fed into the anoxic unit through the second sludge conveying section.

[0008] The anoxic unit is equipped with several rotatable third load bodies, and a third agitator is provided between adjacent third load bodies to agitate the sludge in the anoxic unit and prevent the sludge from settling to the bottom. Along the length of the anoxic unit, the rotation speed of the several third agitators gradually decreases, which is conducive to the settling of the sludge at the tail of the anoxic unit. The rear end of the anoxic unit is equipped with a sludge conveying section for feeding the treated sludge into the sludge storage layer.

[0009] This invention utilizes a floating island processor that travels through polluted ditches, treating the polluted water and sludge along its path using a biological treatment layer. The movement of the floating island naturally creates a flow of water relative to it, which sequentially flows through anaerobic, aerobic, and anoxic units. This flow also carries the sludge, agitated by disturbance devices and mixers, through these units, achieving biological treatment of both the wastewater and sludge. The treated water then continues to flow along the ditch, achieving the effect of in-situ wastewater treatment wherever the floating island passes.

[0010] Sludge treatment presents a significant challenge. This invention utilizes a stirrer to first agitate the surface sludge at the bottom of the ditch. Since the surface sludge buildup is not severe, the energy consumption of the stirrer is minimized. This allows the sludge to be stirred up, ensuring sufficient contact and reaction with the passivating agent, stabilizing phosphorus and heavy metals, and blocking endogenous release, thus preparing a good foundation for subsequent biological treatment. Then, the sludge flows with the water and enters the anaerobic unit, sequentially passing through each first loading body for anaerobic biological treatment. The placement of several first agitators ensures that the sludge in the anaerobic unit does not settle to the bottom and maintains full contact with the anaerobic microorganisms on the first loading bodies, preventing sludge settling and affecting the rotation of the first loading bodies. The rotation speed of the first loading bodies gradually decreases, causing the sludge to settle downstream (i.e., at the tail end) of the anaerobic unit for input into the subsequent aerobic unit.

[0011] The treatment methods in the aerobic and anoxic units are the same as above, except that the microorganisms loaded on the carriers are changed to aerobic microorganisms and anoxic microorganisms, respectively, to treat the wastewater and sludge aerobically and anoxically. The wastewater flow carries the sludge through the aerobic and anoxic units, where it is simultaneously lifted and treated by the second and third agitators.

[0012] Finally, the treated sludge is reduced by 30-40% and then fed into a sludge storage layer for planting vegetation, or removed for use in the construction industry and other fields, achieving comprehensive resource utilization. The floating island processor can travel back and forth in the ditch, with the passivation unit moving forward each time, using energy provided by the photovoltaic unit to treat sewage and sludge in the black and odorous ditch in situ.

[0013] Optionally, the front end of the floating island processor corresponds to the passivation unit, and the rear end corresponds to the oxygen-deficient unit; the driving unit is installed at the rear end of the floating island processor and is used to drive the floating island processor to move in the direction indicated by the passivation unit.

[0014] The floating island processor has a platform on top, and several buoyancy components are evenly arranged on the outer perimeter of the platform;

[0015] The platform has a groove structure, and the platform is filled with treated sludge transported from the anoxic unit to form a sludge storage layer; plants are planted on the sludge storage layer to form a vegetation layer.

[0016] Optionally, the passivation unit includes two parallel hollow tracks, which are located at the front end of the platform and are perpendicular to the direction of travel of the floating island processor.

[0017] A base is slidably connected to a hollow track. The base is equipped with a motor for a disturbance and a medicine tank. The disturbance and the dosing pipe pass through the hollow track and are inserted into the water ditch. The base drives the disturbance and the dosing pipe to move along the hollow track.

[0018] Further optionally, the disturbance includes a telescopic disturbance rod and an openable disturbance part at the bottom of the disturbance rod. The disturbance rod is vertically arranged, and the top of the disturbance rod passes through the base and is connected to a corresponding motor. The motor can control the horizontal rotation of the disturbance and the lifting and lowering of the disturbance.

[0019] The disturbance part includes several straight short rods, the heads of which are hinged to the bottom sidewall of the disturbance rod, and the short rods are evenly arranged along the circumference of the disturbance rod.

[0020] Optionally, the anaerobic unit, aerobic unit, and anoxic unit each have a chamber, the chamber is cubic in shape, the front side is open and unoccupied, the bottom surface of the platform is the top surface of the chamber, and the chamber has a bottom surface and three other sides;

[0021] The length of the chamber is parallel to the length of the floating island processor. The front side of the chamber is close to the front end of the floating island processor, the rear side of the chamber is close to the rear end of the floating island processor, and the left and right sides of the chamber are parallel to the length of the chamber.

[0022] Further optionally, the left and right sides of the chamber are vertical, and the top of the left and right sides is detachably connected to the lower surface of the platform to form a semi-enclosed biochemical treatment channel.

[0023] The rear side of the chamber is inclined, allowing the sludge downstream of each biochemical treatment unit to slide down the corresponding rear side to the bottom of the chamber; the top of the rear side is detachably connected to the lower surface of the platform, and the bottom of the rear side is connected to the bottom surface of the chamber to fix the rear side; there are gaps on both sides of the rear side to the left and right sides respectively, allowing the water treated by the previous treatment unit to flow to the next treatment unit.

[0024] Optionally, several first load bodies in the anaerobic unit are uniformly arranged along the length of the corresponding chamber; the first load body is a flat cubic shape with a mesh surface and is filled with granular carriers to load anaerobic microorganisms. Sewage and sludge flow through the first load body, come into contact with the anaerobic microorganisms, and carry out anaerobic biochemical reactions.

[0025] A first agitator is provided between two adjacent first load bodies. The motor of the first agitator is located on the platform. Several first agitator blades are provided in the upper middle part of the first agitator to agitate the sludge in the upper middle part of the anaerobic unit and prevent a large amount of sludge from settling.

[0026] Optionally, the first load body is provided with a first rotating shaft in the middle, the first rotating shaft vertically passes through the first load body, the top of the first rotating shaft passes through the bottom surface of the platform and is connected to the corresponding motor on the platform, and drives the first load body to rotate through the first rotating shaft; the bottom of the first rotating shaft is rotatably connected to the bottom surface of the anaerobic unit chamber; the two adjacent first load bodies are always perpendicular to each other during rotation.

[0027] Optionally, the agitators of the first agitator are all horizontal, and the length of the agitators gradually increases from top to bottom, and the agitation force gradually increases from top to bottom, effectively preventing sludge settling. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of an in-situ treatment system for black and odorous water bodies.

[0029] Figure 2 for Figure 1 A three-dimensional schematic diagram;

[0030] Figure 3 This is a schematic diagram of the platform's front end;

[0031] Figure 4 This is a schematic diagram of an anaerobic unit;

[0032] Figure 5 This is a schematic diagram of the first load body within the anaerobic unit.

[0033] Among them, 1-floating island processor, 2-photovoltaic unit, 3-vegetation layer, 4-mud storage layer, 5-biochemical treatment layer, 6-passivation unit, 7-anaerobic unit, 8-aerobic unit, 9-anoxic unit, 10-disturbancer, 11-dosing pipe, 12-first load body, 13-first rotating shaft, 14-rear side, 15-platform, 16-hollow track, 17-base, 18-medicine box, 19-disturbancer, 20-chamber. Detailed Implementation

[0034] This embodiment provides an in-situ treatment system for black and odorous water bodies, such as... Figures 1-5 As shown, it includes a floating island processor 1, a drive unit and a photovoltaic unit 2. The drive unit is used to drive the floating island processor 1 to move along the black and smelly ditch. The photovoltaic unit 2 is located above the floating island processor 1 and can use solar energy to power the energy-consuming equipment of the floating island processor 1.

[0035] The floating island processor 1 includes, from top to bottom, a vegetation layer 3, a mud storage layer 4, and a biochemical treatment layer 5; the biochemical treatment layer 5 includes, from front to back, a passivation unit 6, an anaerobic unit 7, an aerobic unit 8, and an anoxic unit 9; the passivation unit 6 includes several rotatable agitators 10 and at least one dosing pipe 11, the dosing pipe 11 is used to input passivating agent into the bottom of the ditch, and the agitators 10 are used to loosen the silt at the bottom of the ditch so that the silt and the passivating agent can come into full contact;

[0036] The anaerobic unit 7 is provided with several rotatable first load bodies 12. A first agitator is provided between adjacent first load bodies 12 to agitate the sludge in the anaerobic unit 7 and prevent the sludge from settling to the bottom. Along the length of the anaerobic unit 7, the rotation speed of the several first agitators gradually decreases, which is conducive to the settling of the sludge at the tail of the anaerobic unit 7. The treated sludge is then fed into the aerobic unit 8 through the first sludge conveying section.

[0037] The aerobic unit 8 is equipped with several rotatable second load bodies, and a second agitator is provided between adjacent second load bodies to agitate the sludge in the aerobic unit 8 and prevent the sludge from settling to the bottom. Along the length of the aerobic unit 8, the rotation speed of the several second agitators gradually decreases, which is conducive to the settling of the sludge at the tail of the aerobic unit 8. The treated sludge is then fed into the anoxic unit 9 through the second sludge conveying section.

[0038] The anoxic unit 9 is equipped with several rotatable third load bodies, and a third agitator is provided between adjacent third load bodies to agitate the sludge in the anoxic unit 9 and prevent the sludge from settling to the bottom. Along the length of the anoxic unit 9, the rotation speed of the several third agitators gradually decreases, which is conducive to the settling of the sludge at the tail of the anoxic unit 9. The treated sludge is then fed into the sludge storage layer 4 through the third sludge conveying section.

[0039] Optionally, the front end of the floating island processor 1 corresponds to the passivation unit 6, and the rear end corresponds to the oxygen-deficient unit 9; the driving unit is installed at the rear end of the floating island processor 1 and is used to drive the floating island processor 1 to move in the direction indicated by the passivation unit 6.

[0040] The floating island processor 1 is provided with a platform 15 on its top, and several buoyancy components (such as floats) are evenly arranged on the outer side of the platform 15 to provide buoyancy for the floating island processor 1.

[0041] The platform 15 has a groove structure, and the platform 15 contains the treated sludge transported by the anoxic unit 9, forming a sludge storage layer 4; plants are planted on the sludge storage layer 4, forming a vegetation layer 3. The drive unit is a conventional drive device.

[0042] Optionally, the photovoltaic section 2 includes a plurality of photovoltaic panels, which are evenly arranged on the platform 15; the lower surface of the photovoltaic panel is connected to the platform 15 by a fixing rod at the center; the bottom surface of the platform 15 is provided with a plurality of docking areas; the bottom of the fixing rod is connected to the docking area to stabilize the photovoltaic panel; the four edges of the docking area are provided with vertical barriers to prevent the soil of the mud storage layer 4 from entering the docking area.

[0043] Alternatively, all photovoltaic panels are connected to an energy storage device on platform 15 via wiring. The energy storage device is then connected to the motors configured with all disturbances 10 and stirrers, as well as the drive motors of all load bodies, thereby powering each device.

[0044] The space above the top of the floating island processor 1 is primarily used to house photovoltaic panels to absorb solar energy. Plants below the photovoltaic panels can be shade-loving species that utilize nutrients from the soil in the mud storage layer 4 for growth, which will later be used as biomass in biomass recycling (e.g., power generation, heat generation). The width of the floating island processor 1 is slightly smaller than the width of the polluted ditch, ensuring its movement without hindering its operation while maximizing its ability to treat wastewater and silt within the ditch. The vegetation layer 3 of the floating island processor 1 also serves as a landscaping element, shielding the surface of the polluted ditch. Simultaneously, the vegetation layer 3 and the mud storage layer 4 also function as filters and aeration agents in the ditch, improving the surrounding environment.

[0045] Optionally, the passivation unit 6 includes two parallel hollow tracks 16, which are located at the front end of the platform 15 and are perpendicular to the travel direction of the floating island processor 1.

[0046] A base 17 is slidably connected to the hollow track 16. The base 17 is equipped with a motor for the disturbance 10 and a medicine tank 18. The disturbance 10 and the dosing tube 11 pass through the hollow track 16 and are inserted into the water ditch. The base 17 drives the disturbance 10 and the dosing tube 11 to move along the hollow track 16.

[0047] Further optionally, the disturbance 10 includes a telescopic disturbance rod and an openable disturbance part 19 at the bottom of the disturbance rod. The disturbance rod is vertically arranged, and the top of the disturbance rod passes through the base 17 and is connected to a corresponding motor. The motor can control the disturbance 10 to rotate horizontally and also control the disturbance 10 to rise and fall.

[0048] The disturbance part 19 includes several straight short rods, the heads of which are hinged to the bottom sidewall of the disturbance rod, and the several short rods are evenly arranged along the circumference of the disturbance rod.

[0049] Initially, with the disturbance rod at its initial length, the disturbance section 19 is positioned on the surface of the silt layer at the bottom of the ditch. The motor controls the extension of the disturbance rod, causing its bottom to insert into the silt (in reality, most of the disturbance rod can be fixed, with only the bottom section being extendable to accommodate its expansion and contraction). All the short rods of the disturbance section 19 are pushed by the silt, causing them to retract (i.e., the tails of the short rods face upwards, and the short rods adhere to the sidewall of the disturbance rod), merging with the disturbance rod to facilitate insertion into the silt layer. Then, the motor lifts the disturbance rod a short distance upwards, causing the tails of the short rods to be obstructed by the silt and detach from the disturbance rod, rotating around the hinged position at the head of the short rod, finally extending the short rod to a horizontal position (reaching its limit and unable to expand further). At this point, the disturbance section 19 unfolds and is positioned at the upper part of the silt layer or near its surface, where the silt accumulation has a lower compaction degree, making it easier to agitate. The motor drives the agitator to rotate, disturbing the silt and causing it to be lifted up and carried by the water flow into the subsequent anaerobic unit 7.

[0050] Optionally, the top of the dosing pipe 11 passes through the base 17 and connects to a corresponding medicine tank 18. The medicine tank 18 stores a passivating agent (a conventional passivating agent used in the art). The bottom of the dosing pipe 11 is located above the agitation section 19, and a valve is provided at the top of the dosing pipe 11 to control the dosage. The dosing pipe 11 can apply the passivating agent to the sludge stirred up by the agitation section 19 to improve the reaction effect. Since the passivating agent may affect subsequent microorganisms, the amount of passivating agent used needs to be adjusted according to the actual amount of sludge and the degree of contamination.

[0051] The present invention is provided with two hollow tracks 16, two disturbances 10 and a dosing pipe 11 that can move back and forth alternately. That is, one disturbance 10 moves first and disturbs the silt, and then the other disturbance 10 follows the first disturbance 10 in the same direction and speed. In this way, the silt is first disturbed by one disturbance 10 and initially loosened, and then disturbed by the other disturbance 10 and completely loosened and lifted up.

[0052] Optionally, the anaerobic unit 7, aerobic unit 8 and anoxic unit 9 each have a chamber 20, the chamber 20 is cubic in shape, the front side is empty and open, the bottom surface of the platform 15 is the top surface of the chamber, and the chamber has a bottom surface and three other sides.

[0053] The length of the chamber is parallel to the length of the floating island processor 1. The front side of the chamber is close to the front end of the floating island processor 1, the rear side 14 of the chamber is close to the rear end of the floating island processor 1, and the left and right sides of the chamber are parallel to the length of the chamber.

[0054] Further optionally, the left and right sides of the chamber are vertical, and the top of the left and right sides is detachably connected to the lower surface of the platform 15 to form a semi-enclosed biochemical treatment channel.

[0055] The rear side 14 of the chamber is inclined, so that the sludge downstream of each biochemical treatment unit can slide down the corresponding rear side to the bottom of the chamber. The top of the rear side is closer to the front end of the floating island processor 1, and the bottom of the rear side is closer to the rear end of the floating island processor 1. The top of the rear side is detachably connected to the lower surface of the platform 15, and the bottom of the rear side is connected to the bottom surface of the chamber to fix the rear side. There are gaps on both sides of the rear side to the left and right sides, respectively, allowing the water treated by the previous treatment unit to flow to the next treatment unit.

[0056] Optionally, a plurality of first load bodies 12 in the anaerobic unit 7 are uniformly arranged along the length of the corresponding chamber; the first load body 12 is a flat cubic shape with a mesh surface and is filled with granular carriers to carry anaerobic microorganisms. Sewage and sludge flow through the first load body 12 and come into contact with the anaerobic microorganisms to carry out anaerobic biochemical reactions.

[0057] A first agitator is provided between two adjacent first load bodies 12. The motor of the first agitator is located on the platform 15. Several first agitator blades are provided in the upper middle part of the first agitator to agitate the sludge in the upper middle part of the anaerobic unit 7 and prevent a large amount of sludge from settling.

[0058] Optionally, a first rotating shaft 13 is provided in the middle of the first load body 12. The first rotating shaft 13 vertically passes through the first load body 12. The top of the first rotating shaft 13 passes through the bottom surface of the platform 15 and is then connected to the corresponding motor on the platform 15. The first load body 12 is rotated through the first rotating shaft 13. The bottom of the first rotating shaft 13 is rotatably connected to the bottom surface of the chamber of the anaerobic unit 7.

[0059] The first load body 12 has gaps between its two sides and the left and right sides of the anaerobic unit 7 chamber, respectively, which does not affect the rotation of the first load body 12.

[0060] The particulate carrier within the first load body 12 is a conventional particulate carrier in the art (e.g., porous diatomaceous earth balls), and the carrier surface can support microorganisms. The mesh size of the surface of the first load body 12 is smaller than the diameter of the particulate carrier, preventing carrier loss while allowing sewage and sludge to enter and exit the first load body 12. As the floating island processor 1 moves forward, under the action of water flow, sewage and sludge can flow along the length direction of the anaerobic unit 7, passing through each of the first load bodies 12. However, if the surface area of ​​the largest area of ​​all the first load bodies 12 is perpendicular to the length direction of the floating island processor 1, i.e., intercepted on the cross-section of the anaerobic unit 7, it is easy for a large amount of sludge to accumulate in the upstream first load bodies 12, resulting in obstruction of the overall flow channel.

[0061] Therefore, the two adjacent first load bodies 12 of the present invention are always perpendicular to each other during rotation. That is, when one rotates to the point where its largest side is parallel to the length direction of the floating island processor 1, the other rotates to the point where its largest side is perpendicular to the length direction of the floating island processor 1. This reduces the sludge flow resistance and maintains the contact between the sludge and the carrier as much as possible.

[0062] Optionally, the agitators of the first agitator are all horizontal, and the length of the agitators gradually increases from top to bottom, and the agitation force gradually increases from top to bottom, effectively preventing sludge settling.

[0063] Since the water in the polluted ditch is already in an anaerobic state, it is conducive to direct anaerobic biological treatment. Anaerobic unit 7 is followed by aerobic unit 8, which has an aeration device, resulting in a high oxygen content in the water. Furthermore, both units have agitators that stir the water and sludge, making the oxygen content in anaerobic unit 7 highly susceptible to influence. Similarly, aerobic unit 8 is connected to anoxic unit 9, easily affecting the oxygen content in anoxic unit 9 as well. Therefore, the rear ends of both the anaerobic unit 7 and the aerobic unit 8 in this invention are provided with rear sides to serve as partitions.

[0064] Because of the rear side design, sludge flow between units would be hindered. This invention improves the sludge flow method by changing the decentralized, non-flowing process to a controlled, centralized flow. Specifically, along the length of the anaerobic unit 7, the rotation speed of several first agitators gradually decreases, which facilitates the settling of sludge at the rear of the anaerobic unit 7 (allowing it to continue flowing to the rear of the chamber under hydraulic action). The rear side of the chamber also facilitates the settling of sludge flowing there, ensuring that most of the treated sludge in the anaerobic unit 7 settles at the rear of the chamber and is then uniformly transported to the front of the aerobic unit 8 via the first sludge conveyor. At the front of the aerobic unit 8, the sludge is re-lifted by the second agitator and continues to undergo aerobic biological treatment with the water flow.

[0065] Optionally, the first sludge conveying section includes a pipe and a submersible sludge pump for conveying sludge from the bottom of the rear end of the anaerobic unit 7 to the bottom of the front end of the aerobic unit 8.

[0066] Optionally, the structure of the aerobic unit 8 is the same as that of the anaerobic unit 7, except that the aerobic microorganisms loaded on the particulate carrier in the second load body are aerated microorganisms loaded on the particulate carrier in the second load body. The bottom of the chamber of the aerobic unit 8 is provided with an aeration pipe, which is connected to the aerator on the platform 15 to increase the oxygen content of the water in the chamber of the aerobic unit 8. At the same time, the aeration effect helps to avoid sludge settling.

[0067] Several second load bodies are evenly arranged along the length of the corresponding chamber within the aerobic unit 8. The structure of the second load body is the same as that of the first load body 12. Sewage and sludge flow through the second load body and come into contact with aerobic microorganisms to carry out aerobic biochemical reactions.

[0068] A second agitator is provided between two adjacent second load bodies. The motor of the second agitator is located on the platform 15. Several second agitator blades are provided in the upper middle part of the second agitator to agitate the sludge in the upper middle part of the aerobic unit 8 and prevent a large amount of sludge from settling.

[0069] Optionally, a second rotating shaft is provided in the middle of the second load body. The second rotating shaft runs vertically through the second load body. The top of the second rotating shaft passes through the bottom surface of the platform 15 and is then connected to the corresponding motor on the platform 15. The second load body is rotated through the second rotating shaft. The bottom of the second rotating shaft is rotatably connected to the bottom surface of the chamber of the aerobic unit 8.

[0070] The second load body has gaps between its two sides and the left and right sides of the aerobic unit 8 chamber, respectively, which does not affect the rotation of the second load body. Adjacent second load bodies remain perpendicular to each other during rotation. The agitators of the second mixer are all horizontal, and the length of the agitators gradually increases from top to bottom, with the agitation force gradually increasing from top to bottom, effectively preventing sludge settling.

[0071] Optionally, the second sludge conveying section includes a pipe and a submersible sludge pump for conveying sludge from the bottom of the rear end of the aerobic unit 8 to the bottom of the front end of the anoxic unit 9.

[0072] Optionally, the structure of the hypoxic unit 9 is the same as that of the anaerobic unit 7, except that the hypoxic microorganisms are loaded on the particulate carrier in the third load cell.

[0073] Several third load bodies are evenly arranged along the length of the corresponding chamber within the anoxic unit 9. The structure of the third load body is the same as that of the first load body 12. Sewage and sludge flow through the third load body and come into contact with anoxic microorganisms to carry out anoxic biochemical reactions.

[0074] A third agitator is provided between two adjacent third load bodies. The motor of the third agitator is located on the platform 15. Several third agitator blades are provided in the upper middle part of the third agitator to agitate the sludge in the upper middle part of the anoxic unit 9 and prevent a large amount of sludge from settling.

[0075] Optionally, the third load body is provided with a third rotating shaft in the middle, the third rotating shaft vertically penetrates the third load body, the top of the third rotating shaft passes through the bottom surface of the platform 15 and is then connected to the corresponding motor on the platform 15, and the third load body is driven to rotate through the third rotating shaft; the bottom of the third rotating shaft is rotatably connected to the bottom surface of the chamber of the hypoxia unit 9.

[0076] The third load body has gaps between its two sides and the left and right sides of the anoxic unit 9 chamber, respectively, which does not affect the rotation of the third load body. Adjacent third load bodies remain perpendicular to each other during rotation. The stirring paddles of the third agitator are all horizontal, and their length gradually increases from top to bottom, resulting in a gradually increasing stirring force, effectively preventing sludge settling.

[0077] Optionally, the third sludge conveying section includes pipes and a submersible sludge pump for conveying sludge from the bottom of the rear end of the anoxic unit 9 to the platform 15.

[0078] The left sides of the chambers of anaerobic unit 7, aerobic unit 8 and anoxic unit 9 are preferably aligned with each other and can be connected sequentially from front to back, or the left sides of adjacent units can be disconnected; the right sides are preferably aligned with each other and can be connected sequentially from front to back, or the right sides of adjacent units can be disconnected.

[0079] Because each biochemical processing unit of this invention has a large number of loads, and each load is equipped with a motor, the equipment cost is high. Optionally, a rotating conveyor belt is provided in the middle of the platform, and several protruding ridges are evenly arranged on the inner side of the conveyor belt. The protruding ridges are vertically arranged and protrude into the conveyor belt.

[0080] Motors are installed at both ends of the conveyor belt. The motors are connected to the conveyor belt through a drive gear. The drive gear meshes with the protruding ridge to drive the conveyor belt to rotate. A driven gear is installed at the top of the shaft of each load body. The driven gear meshes with the protruding ridge, so that the drive gear can drive the driven gear to rotate through the protruding ridge of the conveyor belt, thereby driving the shaft and the load body to rotate.

[0081] Since the rotation speed of each load in each biochemical processing unit is the same and not very high, all loads can be rotated uniformly by a conveyor belt to reduce the number of motors.

[0082] In fact, the tops of all the first, second, and third rotating shafts extend from the middle of the platform and are connected to the corresponding motors. The area enclosed by the conveyor belt is a long and narrow strip. The width of this area can be larger (i.e., the driving and driven gears can be larger) to accommodate the tops of all the aforementioned rotating shafts and their corresponding motors.

Claims

1. An in-situ treatment system for black and odorous water, characterized by, It includes a floating island processor, a drive unit, and a photovoltaic unit. The drive unit is used to propel the floating island processor along the black and smelly ditch. The photovoltaic unit is located above the floating island processor and can use solar energy to power the energy-consuming equipment of the floating island processor. The floating island processor comprises, from top to bottom, a vegetation layer, a silt storage layer, and a biochemical treatment layer; the biochemical treatment layer comprises, from front to back, a passivation unit, an anaerobic unit, an aerobic unit, and an anoxic unit; the passivation unit comprises several rotatable agitators and at least one dosing pipe, the dosing pipe being used to input passivating agent into the bottom of the ditch, and the agitators being used to loosen the silt at the bottom of the ditch, so that the silt and the passivating agent can be in full contact; The anaerobic unit contains several rotatable first load bodies, and a first agitator is provided between adjacent first load bodies to agitate the sludge in the anaerobic unit; the aerobic unit contains several rotatable second load bodies, and a second agitator is provided between adjacent second load bodies; the anoxic unit contains several rotatable third load bodies, and a third agitator is provided between adjacent third load bodies; the rear end of the anoxic unit is provided with a sludge conveying section for feeding the treated sludge into the sludge storage layer.

2. The in-situ processing system according to claim 1, characterized in that, The front end of the floating island processor corresponds to the passivation unit, and the rear end corresponds to the oxygen-deficient unit; the drive unit is installed at the rear end of the floating island processor and is used to drive the floating island processor to move in the direction indicated by the passivation unit. The floating island processor has a platform on top, and several buoyancy components are evenly arranged on the outer perimeter of the platform; The platform has a groove structure, and the platform is filled with treated sludge transported from the anoxic unit to form a sludge storage layer; plants are planted on the sludge storage layer to form a vegetation layer.

3. The in-situ processing system according to claim 2, characterized in that, The passivation unit includes two parallel hollow tracks, which are located at the front end of the platform and are perpendicular to the direction of travel of the floating island processor. A base is slidably connected to a hollow track. The base is equipped with a motor for a disturbance and a medicine tank. The disturbance and the dosing pipe pass through the hollow track and are inserted into the water ditch. The base drives the disturbance and the dosing pipe to move along the hollow track.

4. The in-situ processing system according to claim 3, characterized in that, The disturbance includes a telescopic disturbance rod and an openable disturbance part at the bottom of the disturbance rod. The disturbance rod is set vertically, and the top of the disturbance rod passes through the base and is connected to a corresponding motor. The motor can control the horizontal rotation of the disturbance and the lifting and lowering of the disturbance. The disturbance part includes several straight short rods, the heads of which are hinged to the bottom sidewall of the disturbance rod, and the short rods are evenly arranged along the circumference of the disturbance rod.

5. The in-situ processing system according to claim 2, characterized in that, The anaerobic unit, aerobic unit, and anoxic unit each have a chamber. The chamber is cubic in shape with an open front side. The bottom surface of the platform is the top surface of the chamber. The chamber has a bottom surface and three other sides. The length of the chamber is parallel to the length of the floating island processor. The front side of the chamber is close to the front end of the floating island processor, the rear side of the chamber is close to the rear end of the floating island processor, and the left and right sides of the chamber are parallel to the length of the chamber.

6. The in-situ processing system according to claim 5, characterized in that, The left and right sides of the chamber are vertical, and the top of the left and right sides is detachably connected to the lower surface of the platform to form a semi-enclosed biochemical treatment channel. The rear side of the chamber is inclined, allowing the sludge downstream of each biochemical treatment unit to slide down the corresponding rear side to the bottom of the chamber; the top of the rear side is detachably connected to the lower surface of the platform, and the bottom of the rear side is connected to the bottom surface of the chamber to fix the rear side; there are gaps on both sides of the rear side to the left and right sides respectively, allowing the water treated by the previous treatment unit to flow to the next treatment unit.

7. The in-situ processing system according to claim 6, characterized in that, Several first load bodies in the anaerobic unit are evenly arranged along the length of the corresponding chamber; the first load body is a flat cubic shape with a mesh surface and is filled with granular carriers to load anaerobic microorganisms. Sewage and sludge flow through the first load body and come into contact with the anaerobic microorganisms to carry out anaerobic biochemical reactions. A first agitator is provided between two adjacent first load bodies. The motor of the first agitator is located on the platform. Several first agitator blades are provided in the upper middle part of the first agitator to agitate the sludge in the upper middle part of the anaerobic unit and prevent a large amount of sludge from settling.

8. The in-situ processing system according to claim 7, characterized in that, The first load body has a first rotating shaft in the middle, which vertically passes through the first load body. The top of the first rotating shaft passes through the bottom surface of the platform and is connected to the corresponding motor on the platform. The first load body is driven to rotate through the first rotating shaft. The bottom of the first rotating shaft is rotatably connected to the bottom surface of the anaerobic unit chamber. The two adjacent first load bodies are always perpendicular to each other during rotation.

9. The in-situ processing system according to claim 7, characterized in that, The agitators of the first agitator are all horizontal, and the length of the agitators gradually increases from top to bottom, and the agitation force gradually increases from top to bottom.

10. The in-situ processing system according to claim 7, characterized in that, Along the length of the anaerobic unit, the rotation speed of several first agitators gradually decreases, which is conducive to the settling of sludge at the tail of the anaerobic unit. The treated sludge is then fed into the aerobic unit through the first sludge conveying section.

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