A method for enhancing denitrification of high-nitrogen contaminated leachate in a sludge landfill pit

Abstract

The present application relates to sewage treatment device technical field, especially to a kind of sludge landfill pit high nitrogen pollution leachate's enhanced denitrification method. First, mesh cover box and related biological gel particles are placed on the float, and the denitrification device is prepared;Second, the water body is introduced and the biological denitrification process is realized by propeller and steering mechanism. Then, according to the water quality, the denitrification area is automatically adjusted, and the denitrification effect is optimized. Finally, through the solar power generation and driving control steps, the device is energy self-sufficient, and the driving route and speed are controlled by the central processing unit, to maximize the denitrification efficiency. The present application closely combines short-cut nitrification and anaerobic ammonia oxidation, and uses the small unit structure of the capsule to realize the way that short-cut nitrification and anaerobic ammonia oxidation can be directly coupled in wastewater treatment. The contribution ratio of short-cut nitrification and anaerobic ammonia oxidation can be automatically adjusted according to the proportion of ammonia nitrogen and nitrite nitrogen in the water body. The present application has the advantages of remote operation, no need for external carbon source, saving oxygen supply energy consumption, high denitrification efficiency, no need for sludge discharge, strong adaptability, etc., and achieves the effect of pollution reduction and carbon reduction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sewage treatment devices, and particularly relates to a method for enhancing denitrification of high-nitrogen contaminated leachate in a sludge landfill pit. BACKGROUND

[0002] Compared with sewage treatment technology, sludge treatment and disposal technology in China develops late. Early constructed sewage treatment plants generally have the tendency of 'paying more attention to water and less attention to sludge', pursuing sewage treatment rate, and ignoring the final treatment and disposal of sludge. The sludge which is not properly disposed has a moisture content of usually more than 80%, and is irregularly filled in a sludge landfill pit, and the sludge landfill pit generates a large amount of sludge leachate with high nitrogen pollution concentration and foul odor which cannot be treated (floating above the sludge due to light density). However, there is no effective technical means for denitrification and purification of the above sludge leachate at home and abroad.

[0003] Related researches show that the whole autotrophic denitrification technology such as short-cut nitrification and anaerobic ammonia oxidation process is one of the most competitive and most promising technologies in the field of biological denitrification of wastewater. Specifically, biological denitrification of wastewater is generally completed by two processes of nitrification and denitrification, and the nitrification process is divided into two stages of ammonia oxidation and nitrite oxidation. The two stages are independently catalyzed by ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB) respectively. The first stage is to oxidize ammonia nitrogen NH4 + -N to nitrite nitrogen NO2 - -N under the action of AOB, and the second stage is to oxidize nitrite nitrogen NO2 - -N to nitrate nitrogen NO3 - -N under the action of NOB.

[0004] At the same time, the microbial immobilization (encapsulation) technology is to fix microorganisms on carriers, so that the microbial cells maintain good mass transfer conditions with the outside water body and maintain good biological activity. The effective preservation of biomass and active enzymes by using the immobilization technology can strengthen the function of microorganisms and even the whole treatment process.

[0005] In the current field of sludge treatment, there is no comprehensive treatment scheme integrating various technologies such as short-cut nitrification, anaerobic ammonia oxidation and microbial immobilization. Therefore, the present application intends to integrate the technologies such as short-cut nitrification, anaerobic ammonia oxidation and microbial immobilization into one, and develop a new method which can effectively deal with the floating sludge leachate in the sludge landfill pit. SUMMARY

[0006] The present application aims to provide a method for enhancing denitrification of high-nitrogen contaminated leachate in a sludge landfill pit, so as to solve the problem that there is no effective technical means for denitrification and purification of the above sludge leachate at home and abroad as proposed in the background technology.

[0007] To achieve the above object, the present application provides the following technical solutions: a method for enhancing denitrification of high-nitrogen contaminated leachate in a sludge landfill pit, comprising the following four steps:

[0008] Step one: installation and start-up

[0009] A mesh box is fixedly installed at the bottom side of the floating body, a first storage tank and a second storage tank are fixedly installed at the top side of the mesh box, and a first access hole and a second access hole are respectively formed in the bottom of the storage tanks;

[0010] Two hinges are fixed on the inner wall of the mesh box, an opening partition is movably installed between the hinges, and short-range nitrification immobilized biological gel particles and anaerobic ammonia oxidation immobilized biological gel particles are filled on both sides of the partition;

[0011] A movable pipeline is installed at the bottom of the second access hole and is matched with the anaerobic ammonia oxidation immobilized biological gel particles; a propeller and a steering mechanism are respectively fixedly installed at both sides of the mesh box; and a solar power generation assembly and a central processor are fixedly installed at the top side of the floating body.

[0012] The entire device organized according to the above steps is placed in the floating sludge leachate of the sludge landfill pit, and is started and operated.

[0013] Step two: plug flow and purification

[0014] The propeller and the steering mechanism jointly act to realize horizontal movement of the device on the water surface. The rotation speed difference controls the steering of the entire device, and jointly pushes the device to move stably on the water surface;

[0015] When the device advances, water enters the mesh cover from the water inlet, first contacts the short-range nitrification immobilized biological gel particles, and performs a short-range nitrification process to convert ammonia nitrogen into nitrite nitrogen;

[0016] The water flow after the short-range nitrification treatment flows into the anaerobic ammonia oxidation part through the opening partition, reacts with the anaerobic ammonia oxidation immobilized biological gel particles, further converts the nitrite nitrogen into nitrogen gas, thereby completing the entire biological denitrification process, and the treated water is finally discharged through the water outlet.

[0017] Step three: opening partition adjustment

[0018] According to the detection result of the water quality probe, the central processor adjusts the opening partition to control the spatial ratio of short-range nitrification and anaerobic ammonia oxidation—when the difference between the ammonia nitrogen and nitrite nitrogen concentrations is small, the balance of the two treatment units is maintained by adjusting the opening partition; when one kind of nitrogen concentration is dominant, the treatment space of the part is correspondingly increased to enhance the denitrification performance.

[0019] Step four: solar power generation and travel control

[0020] The device is powered by a solar power generation assembly to ensure continuous operation and self-sufficiency; at the same time, the central processing unit adjusts the speed, path and direction according to the solar power generation effect and water quality detection results to maximize the denitrification efficiency.

[0021] The steering mechanism adjusts the travel direction of the device according to the instructions of the central processing unit, avoids obstacles, controls the device to travel at a speed not higher than 0.1 m / s, and ensures that the travel route covers the entire treatment area of the sludge landfill pit.

[0022] Preferably, a discharging mechanism is installed in each of the first and second manholes, and the discharging mechanism comprises a discharging plate, a discharging hole, a discharging motor, a discharging shaft, and a discharging movable plate. The discharging plate is fixedly installed on the inner wall of the first manhole, four discharging holes are formed on the discharging plate, the discharging motor is fixedly installed on the bottom side of the discharging plate, the discharging shaft penetrates the discharging plate, one end of the discharging shaft is connected to the output end of the discharging motor, and the discharging movable plate is fixedly installed on the other end of the discharging shaft. The discharging movable plate is matched with the discharging hole.

[0023] Preferably, the hinge comprises a fixed block and a flip connection frame. The fixed block is fixedly installed on the inner wall of the mesh cover box body, and the flip connection frame is rotatably installed on the fixed block. A perforated partition plate is embedded in the flip connection frame, and the sizes of the two are matched.

[0024] Preferably, a double-head motor is fixedly installed in the fixed block, both output ends of the double-head motor are fixedly installed on the flip connection frame, a double-head electronic valve is fixedly installed on the flip connection frame, two insertion slots are formed on the perforated partition plate, and the two output ends of the double-head electronic valve are respectively inserted into the insertion slots.

[0025] Preferably, the propeller comprises a mounting bracket, a protective cover, and a propelling screw. The mounting bracket is fixedly installed on the mesh cover box body, the protective cover is fixedly installed on the mounting bracket, and the propelling screw is fixedly installed in the protective cover. The propelling force generated by the propelling screw enables the entire device to move horizontally on the floating sludge leachate liquid surface of the sludge landfill pit, and the travel speed of the device is less than 0.1 m / s.

[0026] Preferably, the turning mechanism comprises a turning plate mounting frame, a turning motor, and a turning plate, the turning plate mounting frame is fixedly installed on the net cover box body, the turning motor is fixedly installed on the turning plate mounting frame, and the turning plate is fixedly installed on the output end of the turning plate mounting frame, and the turning plate is fixedly installed with an obstacle detector and a water quality detector. When the obstacle detector detects that there is an obstacle or a bank in front of the device, a signal is transmitted to the central processor, and then the central processor controls the turning motor to rotate the turning plate by an appropriate angle, so as to avoid the collision of the whole device with the obstacle or the bank; the water quality detector is used for real-time detection of the ammonia nitrogen, nitrite nitrogen, and total nitrogen concentration in the water body, and the detection results are transmitted to the central processor in real time, and once the concentration difference between the ammonia nitrogen and the nitrite nitrogen is more than 20%, the central processor will regulate the position of the opening partition plate.

[0027] Preferably, when the water quality detector on the turning plate detects that the ammonia nitrogen concentration in the water is more than 20% higher than the nitrite nitrogen concentration, the central processor will control one side of the opening partition plate to engage with the hinge at the bottom of the cover body, while the other side is separated from the hinge at the top of the cover body, and is rotated downward, so that the cover body is divided into two parts with the upper half part having a larger volume than the lower half part, at this time, the short-cut nitrification immobilized biological gel particles in the first storage tank will be supplemented and filled into the upper half part of the cover through the first access hole, and the excess anaerobic ammonia oxidation immobilized biological gel particles in the lower half part of the cover body will be transported into the second storage tank through the second access hole, so as to strengthen the short-cut nitrification, and more efficiently convert the excessive ammonia nitrogen in the water into nitrite nitrogen.

[0028] Preferably, when the water quality detector on the turning plate detects that the ammonia nitrogen concentration in the water is more than 20% lower than the nitrite nitrogen concentration, the central processor will control one side of the opening partition plate to engage with the hinge at the top of the cover body, while the other side is separated from the hinge at the bottom of the cover body, and is rotated upward, so that the cover body is divided into two parts with the upper half part having a smaller volume than the lower half part, at this time, the excess short-cut nitrification immobilized biological gel particles in the upper half part of the cover body will be transported into the first storage tank through the first access hole; the anaerobic ammonia oxidation immobilized biological gel particles in the second storage tank will be supplemented and filled into the lower half part of the cover through the second access hole, so as to strengthen the anaerobic ammonia oxidation, and more efficiently convert the excessive nitrite nitrogen in the water into nitrogen.

[0029] Preferably, the solar power generation assembly comprises a base, a rotating seat, a support rod, a round joint, and a solar photovoltaic panel.

[0030] Preferably, the adjusting support rod is provided with rotating holes at both ends, rotating shafts are rotatably installed in the two rotating holes, and the two rotating shafts are fixedly installed on the solar photovoltaic panel and the movable block, respectively.

[0031] Preferably, the rotating seat is provided with a limiting sliding groove on the side surface, a limiting sliding block is slidably installed in the limiting sliding groove, the limiting sliding block is fixedly installed on the movable block, a drive screw is rotatably installed on the inner wall of the limiting sliding groove, the drive screw is threaded through the limiting sliding block, a drive motor is fixedly installed on the rotating seat, and the output end of the drive motor is connected with the drive screw.

[0032] Preferably, the rotating seat is fixedly installed with a rotating motor, the output end of the rotating motor is fixedly installed on the top side of the rotating seat, the top side of the rotating seat is provided with a limiting ring groove, a limiting ring is rotatably installed in the limiting ring groove, the limiting ring is fixedly installed on the bottom side of the rotating seat, and a storage battery is fixedly installed in the base.

[0033] The beneficial effects of the present application are as follows:

[0034] In the above method, the combination of short-term nitrification and anaerobic ammonia oxidation enables the device to efficiently convert ammonia nitrogen in wastewater into nitrogen gas, realizing an effective biological denitrification process. This method not only has high denitrification efficiency, but also does not require additional carbon source and sludge discharge operation during the treatment process, thereby saving energy and maintenance costs.

[0035] The device is equipped with a propeller and a steering mechanism, which enables it to move autonomously on the water surface and adjust the speed, path and direction through intelligent control of the central processor. This ensures that the device can cover the entire treatment area of the sludge landfill pit, effectively treating wastewater and improving the uniformity and coverage area of the treatment.

[0036] The solar power generation assembly provides continuous energy supply for the device, enabling it to operate independently while maintaining high efficiency. This self-sufficient design not only saves energy costs, but also reduces dependence on external energy, improving the reliability and economy of the device.

[0037] By utilizing solar energy and biological treatment technology, the dependence on traditional energy is reduced, and the negative impact of chemicals and sludge on the environment is avoided. This sustainable treatment method helps to protect the health of water bodies and ecosystems.

[0038] The central processor monitors and adjusts various operating parameters of the device, and optimizes the spatial ratio of short-cut nitrification and anaerobic ammonia oxidation according to real-time water quality detection results. This intelligent adjustment capability ensures stable operation and optimal treatment effect of the device under different water quality conditions. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 A perspective structural schematic diagram of a specific embodiment of the present application;

[0040] Figure 2 A top view structural schematic diagram of a specific embodiment of the present application;

[0041] Figure 3 A plan view structural schematic diagram of a specific embodiment of the present application;

[0042] Figure 4 A structural schematic diagram of a first storage tank part of a specific embodiment of the present application;

[0043] Figure 5 A structural schematic diagram of the inside of a specific embodiment of the present application;

[0044] Figure 6 A perspective structural schematic diagram of a specific embodiment of the present application;

[0045] Figure 7 A structural schematic diagram of a solar power generation assembly part of a specific embodiment of the present application;

[0046] Figure 8 A structural schematic diagram of a solar power generation assembly part of a specific embodiment of the present application;

[0047] Figure 9 A structural schematic diagram of a specific embodiment of the present application;

[0048] Figure 10 A structural schematic diagram of a hinge part of a specific embodiment of the present application;

[0049] Figure 11 A structural schematic diagram of a steering mechanism part of a specific embodiment of the present application;

[0050] Figure 12 A structural schematic diagram of a blanking plate part of a specific embodiment of the present application;

[0051] Figure 13 A cross-sectional view of an application scenario of a specific embodiment of the present application;

[0052] Figure 14 The application scene top view of a specific embodiment of the present application.

[0053] The numbers in the figure:

[0054] 100, floating body;

[0055] 200, mesh enclosure;

[0056] 300, first storage tank; 301, second storage tank; 302, first access hole; 303, second access hole; 304, discharging plate; 305, discharging hole; 306, discharging motor; 307, discharging shaft; 308, discharging movable plate;

[0057] 400, hinge; 401, open partition; 4011, fixed block; 402, short-range nitrification immobilized biological gel particles; 403, anaerobic ammonia oxidation immobilized biological gel particles; 404, overturning connecting frame; 405, double-head electronic valve; 406, slot; 407, double-head motor;

[0058] 500, propeller; 501, mounting bracket; 502, protective cover; 503, propeller screw;

[0059] 600, steering mechanism; 601, steering plate mounting bracket; 602, steering motor; 603, steering plate; 604, obstacle detector; 605, water quality detector;

[0060] 700, solar power generation assembly; 701, base; 702, rotating seat; 703, support rod; 704, round joint; 705, solar photovoltaic panel; 706, adjusting support rod; 707, movable block; 708, rotating hole; 709, rotating shaft; 710, limiting sliding groove; 711, limiting sliding block; 712, driving motor; 713, driving screw; 714, battery; 715, limiting ring groove; 716, limiting ring; 717, rotating motor;

[0061] 800, central processing unit;

[0062] 900, sludge landfill pit; 901, side slope; 902, discharging platform; 903, dam; 904, liquid level. DETAILED DESCRIPTION

[0063] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all embodiments.

[0064] Reference Figures 1-4The application discloses a method for enhancing denitrification of high-nitrogen contaminated leachate in a sludge landfill pit.

[0065] Step one: installation and start-up

[0066] The net cover box body 200 is fixedly installed at the bottom side of the floating body 100, the first storage tank 300 and the second storage tank 301 are fixedly installed at the top side of the net cover box body 200, and the first inspection opening 302 and the second inspection opening 303 are respectively formed in the bottom of the storage tanks;

[0067] Two hinges 400 are fixedly installed on the inner wall of the net cover box body, the opening partition plate 401 is movably installed between the hinges, and the short-range nitrification immobilized biological gel particles 402 and the anaerobic ammonia oxidation immobilized biological gel particles 403 are filled on the two sides of the partition plate;

[0068] The movable pipeline is installed at the bottom of the second inspection opening and is matched with the anaerobic ammonia oxidation immobilized biological gel particles, the propeller 500 and the steering mechanism 600 are respectively fixedly installed at the two sides of the net cover box body, and the solar power generation assembly 700 and the central processor 800 are fixedly installed at the top side of the floating body.

[0069] The entire device organized according to the above steps is placed in the floating sludge leachate of the sludge landfill pit 900, and is started and operated.

[0070] Step two: plug flow and purification

[0071] The propeller 500 and the steering mechanism 600 jointly act to realize horizontal movement of the device on the water surface, the rotation speed difference is used to control the steering of the entire device, and the device is jointly pushed to move stably on the water surface;

[0072] When the device advances, water enters the net cover box body 200 from the water inlet 101, first contacts the short-range nitrification immobilized biological gel particles 402, and performs a short-range nitrification process to convert ammonia nitrogen into nitrite nitrogen;

[0073] The water treated by the short-range nitrification process flows into the anaerobic ammonia oxidation part through the opening partition plate 401, reacts with the anaerobic ammonia oxidation immobilized biological gel particles 403, further converts the nitrite nitrogen into nitrogen, and thus completes the entire biological denitrification process, and finally the treated water is discharged through the water outlet 102.

[0074] Step three: opening partition plate adjustment

[0075] According to the detection result of the water quality probe, the central processor 800 adjusts the opening partition plate 401 to control the space ratio of the short-range nitrification and the anaerobic ammonia oxidation, when the ammonia nitrogen and the nitrite nitrogen concentration difference is small, the two treatment units are balanced by adjusting the opening partition plate, and when one kind of nitrogen concentration is dominant, the treatment space of the part is correspondingly increased to enhance the denitrification performance.

[0076] Step four: solar power generation and travel control:

[0077] The device is powered by the solar power generation assembly 700, ensuring continuous operation and self-sufficiency. At the same time, the central processor 800 adjusts the travel speed, path and direction according to the solar power generation effect and water quality detection results, ensuring maximum denitrification efficiency.

[0078] The steering mechanism 600 adjusts the travel direction of the device according to the central processor instructions, avoids obstacles, controls the device to travel at a speed not higher than 0.1 m / s, and ensures that the travel route covers the entire treatment area of the sludge landfill pit.

[0079] The above method combines short-cut nitrification and anaerobic ammonia oxidation, and uses the small unit structure of the capsule to realize the treatment of short-cut nitrification and anaerobic ammonia oxidation that can move directly in wastewater, with the advantages of no need for external carbon source, saving oxygen supply energy consumption, high denitrification efficiency, no need for sludge discharge, etc., significant economic and environmental benefits.

[0080] Please refer to Figure 12 In an optional embodiment: the first access hole 302 and the second access hole 303 are both provided with a discharging mechanism, which includes a discharging plate 304, a discharging hole 305, a discharging motor 306, a discharging shaft 307, and a discharging movable plate 308. The discharging plate 304 is fixedly installed on the inner wall of the first access hole 302, and four discharging holes 305 are formed on the discharging plate 304. The discharging motor 306 is fixedly installed on the bottom side of the discharging plate 304, and the discharging shaft 307 penetrates the discharging plate 304. One end of the discharging shaft 307 is connected to the output end of the discharging motor 306, and the discharging movable plate 308 is fixedly installed on the other end of the discharging shaft 307. The discharging movable plate 308 is matched with the discharging hole 305. The first access hole and the second access hole are respectively used for filling and replacing the short-cut nitrification immobilized biological gel particles and the anaerobic ammonia oxidation immobilized biological gel particles. The discharging motor 306 drives the discharging shaft 307 to rotate, and the rotating discharging shaft 307 drives the discharging movable plate 308 to rotate on the discharging plate 304, thereby realizing the effect of opening and closing the discharging hole 305.

[0081] Please refer to Figure 9 and 10In an alternative embodiment, the hinge 400 comprises a fixed block 4011 and a flip connection frame 404, the fixed block 4011 is fixedly installed on the inner wall of the mesh enclosure box 200, the flip connection frame 404 is rotatably installed on the fixed block 4011, and the flip connection frame 404 is embedded with a perforated partition plate 401 inside, and the sizes of the two are matched. A double-head motor 407 is fixedly installed in the fixed block 4011, and the two output ends of the double-head motor 407 are fixedly installed on the flip connection frame 404. A double-head electronic valve 405 is fixedly installed on the flip connection frame 404. Two insertion slots 406 are formed on the perforated partition plate 401, and the two output ends of the double-head electronic valve 405 are respectively inserted into the insertion slots 406. The perforated partition plate is rectangular, and the opposite two sides can be respectively clamped with the first hinge and the second hinge, and the other two sides can slide on the inner side of the mesh enclosure, so as to divide the interior of the mesh enclosure into an upper half and a lower half. When one side of the perforated partition plate is clamped with the first hinge, the other side opposite to this side can be clamped with the second hinge, so as to divide the interior volume of the mesh enclosure into two equal parts. When one side of the perforated partition plate is clamped with the first hinge, the other side opposite to this side can be separated from the second hinge, so that the perforated partition plate rotates downward around the first hinge, so as to make the volume of the upper half of the mesh enclosure larger than that of the lower half. Similarly, when one side of the perforated partition plate is clamped with the second hinge, the other side opposite to this side can be separated from the first hinge, so that the perforated partition plate rotates upward around the second hinge, so as to make the volume of the upper half of the mesh enclosure smaller than that of the lower half. The upper half of the mesh enclosure is filled with short-cut nitrification immobilized biological gel particles, and the lower half is filled with anaerobic ammonia oxidation immobilized biological gel particles. The mesh aperture of the mesh enclosure is smaller than the particle size of the short-cut nitrification immobilized biological gel particles and the anaerobic ammonia oxidation immobilized biological gel particles, so as to avoid the particles flowing out of the mesh enclosure.

[0082] Please refer to Figure 6 In an alternative embodiment, the propeller 500 comprises a mounting frame 501, a protective cover 502, and a propeller 503, the mounting frame 501 is fixedly installed on the mesh enclosure box 200, the protective cover 502 is fixedly installed on the mounting frame 501, and the propeller 503 is fixedly installed in the protective cover 502. The propeller 503 on the mounting frame 501 can rotate to generate thrust, and the protective cover 502 can protect the propeller 503 when it rotates. The thrust generated by the propeller 503 makes the whole device move horizontally on the floating sludge leachate liquid surface 904 of the sludge landfill pit 900, and the running speed of the device is 0.05 m / s.

[0083] Please refer to Figure 11In an alternative embodiment, the steering mechanism 600 comprises a steering plate mounting frame 601, a steering motor 602, and a steering plate 603. The steering plate mounting frame 601 is fixedly mounted on the net cover box body 200. The steering motor 602 is fixedly mounted on the steering plate mounting frame 601. The steering plate 603 is fixedly mounted on the output end of the steering plate mounting frame 601. The obstacle detector 604 and the water quality detector 605 are fixedly mounted on the steering plate 603.

[0084] When the obstacle detector 604 detects an obstacle or a bank in front of the device, it transmits a signal to the central processor 800, which in turn controls the steering motor 602 to rotate the steering plate 603 by an appropriate angle, thereby avoiding collision of the entire device with the obstacle or bank. The water quality detector 605 is used to detect the concentrations of ammonia nitrogen, nitrite nitrogen, and total nitrogen in the water body in real time and transmit the detection results to the central processor 800 in real time. Once the concentrations of ammonia nitrogen and nitrite nitrogen differ by more than 20%, the central processor 800 will regulate the position of the perforated partition 401.

[0085] When the water quality detector 605 on the steering plate 603 detects that the concentration of ammonia nitrogen in the water is more than 20% higher than the concentration of nitrite nitrogen, the central processor 800 will control one side of the perforated partition 401 to engage with the hinge 400 at the bottom of the net cover box body 200, while the other side is separated from the hinge 400 at the top of the net cover box body 200 and rotates downward, thereby dividing the net cover box body 200 into two parts with the upper half having a larger volume than the lower half. At this time, the short-cut nitrification immobilized biological gel particles 402 in the first storage tank will be replenished to the upper half of the net cover box body 200 through the first access hole 302, while the excess anaerobic ammonia oxidation immobilized biological gel particles 403 in the lower half of the net cover box body 200 will be transported to the second storage tank 301 through the second access hole 303, thereby enhancing short-cut nitrification and more efficiently converting excessive ammonia nitrogen in the water into nitrite nitrogen.

[0086] When the water quality detector 605 on the steering plate 603 detects that the ammonia nitrogen concentration in the water is more than 20% lower than the nitrite nitrogen concentration, the central processing unit 800 will control one side of the opening partition plate 401 to engage with the hinge 400 on the top of the mesh cover box 200, while the other side is separated from the hinge 400 on the bottom of the mesh cover box 200, and rotates upward, so that the mesh cover box 200 is divided into two parts with the upper half volume smaller than the lower half volume, at this time the excess short-cut nitrification immobilized biological gel particles 402 in the upper half of the mesh cover box 200 will be transported into the first storage tank 300 through the first access hole 302; the anaerobic ammonia oxidation immobilized biological gel particles 403 in the second storage tank 301 will be supplemented to the lower half of the mesh cover box 200 through the second access hole 303, so as to strengthen the anaerobic ammonia oxidation, thereby more efficiently converting the excessive nitrite nitrogen in the water into nitrogen.

[0087] Please refer to Figure 7 and 8 In an optional embodiment: the solar power generation assembly 700 comprises a base 701, a rotating seat 702, a support rod 703, a round joint 704, a solar photovoltaic panel 705, the base 701 is fixedly installed on the top side of the floating body 100, the rotating seat 702 is rotatably installed on the top side of the base 701, the support rod 703 is fixedly installed on the top end of the rotating seat 702, the round joint 704 is movably installed on the round top end of the rotating seat 702, the solar photovoltaic panel 705 is fixedly installed on the round joint 704, the bottom side of the solar photovoltaic panel 705 is rotatably installed with two adjusting support rods 706, the bottom ends of the two adjusting support rods 706 are rotatably installed with movable blocks 707, the two movable blocks 707 are respectively slidably installed on the two sides of the rotating seat 702, the two ends of the adjusting support rod 706 are provided with rotating holes 708, the two rotating holes 708 are rotatably installed with rotating shafts 709, the two rotating shafts 709 are respectively fixedly installed on the solar photovoltaic panel 705 and the movable block 707, the side surface of the rotating seat 702 is provided with a limiting sliding groove 710, the limiting sliding groove 710 is slidably installed with a limiting sliding block 711, the limiting sliding block 711 is fixedly installed on the movable block 707, the inner wall of the limiting sliding groove 710 is rotatably installed with a driving screw rod 713, the driving screw rod 713 is threaded through the limiting sliding block 711, the rotating seat 702 is fixedly installed with a driving motor 712, the output end of the driving motor 712 is connected with the driving screw rod 713, the rotating seat 702 is fixedly installed with a rotating motor 717, the output end of the rotating motor 717 is fixedly installed on the top side of the rotating seat 702, the top side of the rotating seat 702 is annularly provided with a limiting ring groove 715, the limiting ring groove 715 is rotatably installed with a limiting ring 716, the limiting ring 716 is fixedly installed on the bottom side of the rotating seat 702, the base 701 is fixedly installed with a storage battery 714;

[0088] It should be noted that the solar photovoltaic panel 705 can provide power for the device, in order to ensure the maximum power generation effect, the movable block 707 and the adjusting support rod 706 are controlled to move by using the rotating seat 702 to drive the driving lead screw 713 to rotate, so that the effect of adjusting the direction of the solar photovoltaic panel 705 is achieved, meanwhile, the bottom side rotating motor 717 of the rotating seat 702 can drive itself to rotate on the base 701, so that the direction adjusting function of the solar photovoltaic panel 705 is further enhanced, and the excess power generated can also be stored through the storage battery 714.

[0089] Working principle of the present application:

[0090] As Figure 13 And 14As shown, the device can be set in the floating sludge leachate of sludge landfill pit 900 (or urban slow-flow heavily eutrophicated lake and black and odorous river, etc. high ammonia nitrogen contaminated water body), mainly including: open baffle 401, first hinge 400, second hinge 400, mesh cover box 200, short-cut nitrification immobilized biological gel particles 402, anaerobic ammonia oxidation immobilized biological gel particles 403, deflector 603, propeller 500, float 100, solar photovoltaic panel 705, first access hole 302, second access hole 303, first storage tank 300, second storage tank 301, central processing unit 800, the open baffle 401 is rectangular, the opposite two sides can be respectively clamped with the first hinge 400 and the second hinge 400, and the other two sides can slide inside the mesh cover box 200, so as to divide the inside of the mesh cover box 200 into upper and lower parts, when one side of the open baffle 401 is clamped with the first hinge 400, the other side opposite to this side can be clamped with the second hinge 400, so as to divide the internal volume of the mesh cover box 200 into two equal parts. When one side of the open baffle 401 is clamped with the first hinge 400, the other side opposite to this side can be separated from the second hinge 400, so that the open baffle 401 rotates downward around the first hinge 400, so as to make the upper half volume of the mesh cover box 200 larger than the lower half. Similarly, when one side of the open baffle 401 is clamped with the second hinge 400, the other side opposite to this side can be separated from the first hinge 400, so that the open baffle 401 rotates upward around the second hinge 400, so as to make the upper half volume of the mesh cover box 200 smaller than the lower half, the upper half of the mesh cover box 200 is filled with short-cut nitrification immobilized biological gel particles 402, and the lower half is in the state of anaerobic ammonia oxidation immobilized biological gel particles 403. The mesh aperture of the mesh cover box 200 is smaller than the particle size of the short-cut nitrification immobilized biological gel particles 402 and the anaerobic ammonia oxidation immobilized biological gel particles 403, so as to avoid the particles flowing out of the mesh cover box 200, the central side of the mesh cover box 200 close to the first hinge 400 is provided with the deflector 603, which can adjust the forward direction of the whole system in the water body; the deflector 603 is loaded with an obstacle detector and a water quality detector, the central side of the mesh cover box 200 close to the second hinge 400 is provided with the propeller 500, which can push the whole system to move horizontally in the water body and can adjust the forward speed.The device travel speed suggestion is less than 0.1 m / s (too fast may lead to incomplete short-term nitrification reaction), the device travel path can be self-cruise, and cover all areas of the surface layer of the sludge landfill pit 900. For poor water quality key areas, multiple travel can be repeated to achieve the effect of key purification. When the propeller 500 pushes the entire system to move horizontally in the water body, the water body will impact the flow in the opposite direction into the mesh cover box body 200 and the short-term nitrification immobilized biological gel particles 402 and anaerobic ammonia oxidation immobilized biological gel particles 403 filled therein under the action of inertia, so that the water body reacts with the short-term nitrification immobilized biological gel particles 402 and anaerobic ammonia oxidation immobilized biological gel particles 403, thereby achieving denitrification and purification. The upper surface of the mesh cover box body 200 is provided with a float 100, which is opaque and can float the entire system on the water surface. The upper surface of the float 100 is provided with a solar photovoltaic panel 705 at the center position, which can power the system. The upper surface of the float 100 is provided with a first access hole 302 and a second access hole 303 at both ends, which penetrate the upper surface of the float 100 and the mesh cover box body 200, respectively, for filling and replacing the short-term nitrification immobilized biological gel particles 402 and anaerobic ammonia oxidation immobilized biological gel particles 403. The first access hole 302 and the second access hole 303 are respectively provided with a first storage tank 300 and a second storage tank 301 above, which are respectively used to store excess short-term nitrification immobilized biological gel particles 402 and anaerobic ammonia oxidation immobilized biological gel particles 403. When the obstacle detector on the deflector plate 603 detects an obstacle near the front of the system, it will transmit a signal to the central processor 800 (not shown in the figure), which will control the rotation direction of the deflector plate 603 to avoid collision with the obstacle.

[0091] When the water quality detector on the deflection plate 603 detects that the ammonia nitrogen concentration in the water is not more than 20% different from the nitrite nitrogen concentration, the central processor 800 controls one side of the open partition 401 to be engaged with the first hinge 400 and the other side to be engaged with the second hinge 400, so that the cover is divided into two equal-volume upper and lower parts. When the water quality detector on the deflection plate 603 detects that the ammonia nitrogen concentration in the water is more than 20% higher than the nitrite nitrogen concentration, the central processor 800 controls one side of the open partition 401 to be engaged with the first hinge 400 and the other side to be separated from the second hinge 400 and turned downward, so that the cover is divided into two parts with the upper part having a larger volume than the lower part. At this time, the short-cut nitrification immobilized biological gel particles 402 in the first storage tank 300 are replenished to the upper part of the cover through the first access hole 302, and the excess anaerobic ammonia oxidation immobilized biological gel particles 403 in the lower part of the cover are transported to the second storage tank 301 through the second access hole 303. In this way, the short-cut nitrification is strengthened, so that the excessive ammonia nitrogen in the water is more efficiently converted into nitrite nitrogen. When the water quality detector on the deflection plate 603 detects that the ammonia nitrogen concentration in the water is less than 20% lower than the nitrite nitrogen concentration, the central processor 800 controls one side of the open partition 401 to be engaged with the second hinge 400 and the other side to be separated from the first hinge 400 and turned upward, so that the cover is divided into two parts with the upper part having a smaller volume than the lower part. At this time, the excess short-cut nitrification immobilized biological gel particles 402 in the upper part of the cover are transported to the first storage tank 300 through the first access hole 302, and the anaerobic ammonia oxidation immobilized biological gel particles 403 in the second storage tank 301 are replenished to the lower part of the cover through the second access hole 303. In this way, the anaerobic ammonia oxidation is strengthened, so that the excessive nitrite nitrogen in the water is more efficiently converted into nitrogen.

[0092] The above description is only the preferred embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can make equivalent replacements or changes to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered by the protection scope of the present application.

Claims

1. A method for enhanced denitrification of high-nitrogen contaminated leachate from a sludge landfill pit, characterized by, The method comprises the following steps: Installation and start-up: A mesh box (200) is fixedly installed on the bottom side of the floating body (100), a first storage tank (300) and a second storage tank (301) are fixedly installed on the top side of the mesh box (200), and a first manhole (302) and a second manhole (303) are respectively formed in the bottom of the storage tanks; Two hinges (400) are fixedly installed on the inner wall of the mesh box, an opening partition plate (401) is movably installed between the hinges, and short-range nitrification immobilized biological gel particles (402) and anaerobic ammonia oxidation immobilized biological gel particles (403) are filled on both sides of the partition plate; An active pipeline is installed at the bottom of the second manhole and is matched with the anaerobic ammonia oxidation immobilized biological gel particles; meanwhile, a propeller (500) and a steering mechanism (600) are respectively fixedly installed on both sides of the mesh box; and a solar power generation assembly (700) and a central processor (800) are fixedly installed on the top side of the floating body; The entire device organized according to the above steps is placed in the floating sludge leachate of the sludge landfill pit (900), and is started and operated; Pushing flow and purification: The propeller (500) and the steering mechanism (600) jointly act to realize the horizontal movement of the device on the water surface; the rotation direction of the entire device is controlled through the rotation speed difference, and the device is jointly pushed to move stably on the water surface; When the device advances, water enters the mesh box (200) from the water inlet, first contacts the short-range nitrification immobilized biological gel particles (402), and performs the short-range nitrification process to convert the ammonia nitrogen into nitrite nitrogen; The water flow subjected to the short-range nitrification treatment flows into the anaerobic ammonia oxidation part through the opening partition plate (401), reacts with the anaerobic ammonia oxidation immobilized biological gel particles (403), further converts the nitrite nitrogen into nitrogen, and thus completes the entire biological denitrification process; finally, the treated water is discharged through the water outlet; Opening partition plate adjustment: According to the detection result of the water quality detector (605), the central processor (800) adjusts the position of the opening partition plate (401) to control the space ratio of the short-range nitrification and the anaerobic ammonia oxidation; when the water quality detector (605) detects that the ammonia nitrogen concentration in the water is 20% higher than the nitrite nitrogen concentration, the upper half volume is greater than the lower half volume; when the water quality detector (605) detects that the ammonia nitrogen concentration in the water is 20% lower than the nitrite nitrogen concentration, the upper half volume is less than the lower half volume; Solar power generation and travel control: The solar power generation assembly (700) provides energy for the device to ensure the continuous operation and self-sufficiency of the device; meanwhile, the central processor (800) adjusts the travel speed, path and direction according to the solar power generation effect and the water quality detection result to ensure the maximum denitrification efficiency; The steering mechanism (600) adjusts the travel direction of the device according to the central processor instruction, avoids obstacles, controls the device to travel at a speed not higher than 0.1 m / s, and ensures that the travel route covers the entire treatment area of the sludge landfill pit.

2. The method for enhanced denitrification of high-nitrogen contaminated leachate from sludge landfill pit according to claim 1, characterized in that: The first access hole (302) and the second access hole (303) are provided with a discharging mechanism, the discharging mechanism comprises a discharging plate (304), a discharging hole (305), a discharging motor (306), a discharging shaft (307) and a discharging movable plate (308), the discharging plate (304) is fixedly installed on the inner wall of the first access hole (302), four discharging holes (305) are formed in the discharging plate (304), the discharging motor (306) is fixedly installed on the bottom side of the discharging plate (304), the discharging shaft (307) penetrates the discharging plate (304), one end of the discharging shaft (307) is connected with the output end of the discharging motor (306), and the discharging movable plate (308) is fixedly installed on the other end of the discharging shaft (307) and is matched with the discharging hole (305).

3. The method for enhanced denitrification of high-nitrogen contaminated leachate from sludge landfill pit according to claim 1, characterized in that: The hinge (400) comprises a fixed block (4011) and a turnover connecting frame (404), the fixed block (4011) is fixedly installed on the inner wall of the mesh cover box body (200), and the turnover connecting frame (404) is rotatably installed on the fixed block (4011); the turnover connecting frame (404) is internally embedded with an opening partition plate (401), and the sizes of the two are matched.

4. The method for enhanced denitrification of high-nitrogen contaminated leachate from sludge landfill pit according to claim 3, characterized in that: The double-head motor (407) is fixedly installed in the fixed block (4011), both output ends of the double-head motor (407) are fixedly installed on the turnover connecting frame (404), the double-head electronic valve (405) is fixedly installed on the turnover connecting frame (404), two insertion grooves (406) are formed in the opening partition plate (401), and both output ends of the double-head electronic valve (405) are respectively inserted into the insertion grooves (406).

5. The method for enhanced denitrification of high-nitrogen contaminated leachate from sludge landfill pit according to claim 1, characterized in that: The propeller (500) comprises a mounting frame (501), a protective cover (502) and a propelling propeller (503), the mounting frame (501) is fixedly installed on the mesh cover box body (200), the protective cover (502) is fixedly installed on the mounting frame (501), and the propelling propeller (503) is fixedly installed in the protective cover (502); the propelling force generated by the propelling propeller (503) enables the whole device to move horizontally on the floating sludge leachate liquid surface (904) of the sludge landfill pit (900), and the running speed of the device is less than 0.1 m / s.

6. The method for enhanced denitrification of high-nitrogen contaminated leachate from sludge landfill pit according to claim 1, characterized in that: The turning mechanism (600) comprises a turning plate mounting frame (601), a turning motor (602) and a turning plate (603), the turning plate mounting frame (601) is fixedly installed on the mesh cover box body (200), the turning motor (602) is fixedly installed on the turning plate mounting frame (601), and the turning plate (603) is fixedly installed on the output end of the turning plate mounting frame (601); the obstacle detector (604) and the water quality detector (605) are fixedly installed on the turning plate (603); when the obstacle detector (604) detects that there is an obstacle or a bank in front of the device, a signal is transmitted to the central processor (800), and then the central processor (800) controls the turning motor (602) to rotate the turning plate (603) by an appropriate angle, so that the whole device avoids colliding with the obstacle or the bank; the water quality detector (605) is used for detecting the ammonia nitrogen, nitrite nitrogen and total nitrogen concentration of the water body in real time, and transmitting the detection result to the central processor (800) in real time; once the concentration difference between the ammonia nitrogen and the nitrite nitrogen is more than 20%, the central processor (800) will regulate the position of the opening partition plate (401).

7. The method for enhanced denitrification of high-nitrogen contaminated leachate from sludge landfill pit according to claim 6, characterized in that: When the water quality detector (605) on the turning plate (603) detects that the ammonia nitrogen concentration in the water is more than 20% higher than the nitrite nitrogen concentration, the central processor (800) will control one side of the opening partition plate (401) to be clamped with the hinge (400) at the bottom of the mesh cover box body (200), while the other side is separated from the hinge (400) at the top of the mesh cover box body (200), and is rotated downward, so that the mesh cover box body (200) is divided into two parts with the upper half volume being larger than the lower half volume; at this time, the short-cut nitrification immobilized biological gel particles (402) in the first storage tank will be supplemented and filled into the upper half of the mesh cover box body (200) through the first access hole (302), and the excess anaerobic ammonia oxidation immobilized biological gel particles (403) in the lower half of the mesh cover box body (200) will be transported into the second storage tank (301) through the second access hole (303), so as to strengthen the short-cut nitrification, and more efficiently convert the excessive ammonia nitrogen in the water into nitrite nitrogen.

8. The method for enhanced denitrification of high-nitrogen contaminated leachate from sludge landfill pit according to claim 6, characterized in that: When the water quality detector (605) on the turning plate (603) detects that the ammonia nitrogen concentration in the water is more than 20% lower than the nitrite nitrogen concentration, the central processing unit (800) will control one side of the open hole partition plate (401) to engage with the hinge (400) at the top of the mesh cover box (200), while the other side is separated from the hinge (400) at the bottom of the mesh cover box (200), and rotates upward, so that the mesh cover box (200) is divided into two parts with the upper half volume smaller than the lower half volume, at this time the excess short-cut nitrification immobilized biological gel particles (402) in the upper half of the mesh cover box (200) will be transported to the first storage tank (300) through the first access hole (302); the anaerobic ammonia oxidation immobilized biological gel particles (403) in the second storage tank (301) will be supplemented and filled into the lower half of the mesh cover box (200) through the second access hole (303), thereby strengthening anaerobic ammonia oxidation, so as to more efficiently convert excessive nitrite nitrogen in water into nitrogen.

9. The method for enhanced denitrification of high-nitrogen contaminated leachate of sludge landfill pit according to claim 1, characterized in that: The solar power generation assembly (700) comprises a base (701), a rotating seat (702), a support rod (703), a round joint (704), a solar photovoltaic panel (705), the base (701) is fixedly installed on the top side of the floating body (100), the rotating seat (702) is rotatably installed on the top side of the base (701), the support rod (703) is fixedly installed on the top end of the rotating seat (702), the round joint (704) is movably installed on the round top end of the support rod (703), the solar photovoltaic panel (705) is fixedly installed on the round joint (704), two adjusting support rods (706) are rotatably installed on the bottom side of the solar photovoltaic panel (705), two movable blocks (707) are rotatably installed on the bottom ends of the two adjusting support rods (706), and the two movable blocks (707) are slidably installed on the two sides of the rotating seat (702); rotating holes (708) are formed in the two ends of the adjusting support rod (706), rotating shafts (709) are rotatably installed in the two rotating holes (708), and the two rotating shafts (709) are fixedly installed on the solar photovoltaic panel (705) and the movable block (707) respectively.

10. The method for enhanced denitrification of high-nitrogen contaminated leachate from sludge landfill pit according to claim 9, characterized in that: The side of the rotating seat (702) is provided with a limiting sliding groove (710), the limiting sliding groove (710) is slidably provided with a limiting sliding block (711), the limiting sliding block (711) is fixedly installed on the movable block (707), a driving lead screw (713) is rotatably installed on the inner wall of the limiting sliding groove (710), the driving lead screw (713) is threaded through the limiting sliding block (711), the rotating seat (702) is fixedly provided with a driving motor (712), the output end of the driving motor (712) is connected with the driving lead screw (713); the rotating seat (702) is fixedly provided with a rotating motor (717), the output end of the rotating motor (717) is fixedly installed on the top side of the base (701), the top side of the base (701) is provided with a limiting ring groove (715), the limiting ring groove (715) is rotatably provided with a limiting ring (716), the limiting ring (716) is fixedly installed on the bottom side of the rotating seat (702), and the base (701) is fixedly provided with a storage battery (714).

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