Low-carbon treatment equipment and process for high-ammonia-nitrogen organic wastewater

Abstract

The application relates to a low-carbon treatment equipment and process for high-ammonia-nitrogen organic wastewater, and the core lies in that, 1, aiming at the characteristics that the ammonia-nitrogen concentration of the high-ammonia-nitrogen wastewater is greater than 50 mg / L, and the wastewater also contains nitrous acid nitrogen and nitric acid nitrogen, a denitrification and dephosphorization module and a strengthened denitrification module are adopted to form cascaded secondary denitrification and dephosphorization, so that the water quality can be further improved; 2, a carbon source supply module can introduce carbon sources into the denitrification and dephosphorization module, and the carbon sources in the reactor are effectively utilized in a directional manner, so that the high-ammonia-nitrogen organic wastewater can be treated in a low-carbon, high-efficiency, stable and energy-saving mode, energy consumption is reduced, carbon emission is reduced, and the technical effect of efficient purification is realized.

Description

Technical Field

[0001] This invention belongs to the field of environmental protection technology, and in particular relates to low-carbon treatment equipment and processes for high ammonia nitrogen organic wastewater. Background Technology

[0002] High-ammonia-nitrogen organic wastewater is commonly found in industries such as chemical, pharmaceutical, and food processing. The discharged wastewater typically contains ammonia nitrogen (… Concentration > 50 mg / L, also contains nitrite nitrogen ( ) and nitrate nitrogen ( The COD (Chemical Oxygen Demand, the amount of oxygen required per unit volume of organic matter in water) is >1000 mg / L. The treatment of high-ammonia-nitrogen organic wastewater faces two core challenges: ammonia nitrogen removal requires a large amount of oxygen (nitrification of 1 mg / L...). Approximately 4.57 mg of O2 is required, while the degradation of organic matter depends on a carbon source (denitrification of 1 mg). Approximately 2.86 mg COD is required. According to relevant research, high concentrations of ammonia nitrogen in an environment ( Concentrations > 500 mg / L significantly inhibit microbial activity, leading to effluent quality exceeding standards. Therefore, the amount of functional microorganisms in high-ammonia nitrogen wastewater is severely insufficient. Traditional biological treatment processes for high-ammonia nitrogen organic wastewater are difficult to directly treat to effluent discharge. Traditional activated sludge processes treat 1m³ of... 3 High ammonia nitrogen wastewater (ammonia nitrogen ≥ 500 mg / L, COD ≥ 2000 mg / L) requires 1.2-1.8 kWh of electricity and emits approximately 0.7-1.1 kg CO2. Furthermore, in wastewater treatment systems, aeration is typically controlled according to set times or fixed air volumes, which can easily lead to over-aeration. This not only wastes energy but may also inhibit the activity of facultative anaerobic microorganisms such as denitrifying bacteria, affecting the system's nitrogen removal efficiency.

[0003] Therefore, how to provide a new type of equipment that can effectively utilize carbon sources in wastewater through technological innovation, energy recovery, and intelligent control, thereby achieving low-carbon, high-efficiency, stable, and energy-saving treatment of high-ammonia nitrogen organic wastewater, and realizing efficient purification while reducing energy consumption and carbon emissions, is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0004] To solve at least one of the above-mentioned technical problems, the present invention provides a low-carbon treatment device for high ammonia nitrogen organic wastewater, comprising: a pretreatment module, an aerobic module, a nitrogen and phosphorus removal module, an enhanced nitrogen removal module, a sedimentation effluent module, a carbon source supply module, and a control module;

[0005] The pretreatment module is used to physically intercept and settle wastewater to obtain pretreated wastewater;

[0006] The aerobic module is used to provide an aerobic environment, consume the organic matter in the pretreated wastewater, and obtain wastewater after aerobic consumption;

[0007] The denitrification and phosphorus removal modules and the enhanced denitrification module constitute a cascaded secondary denitrification and phosphorus removal system, which is used to perform cascaded secondary denitrification and phosphorus removal on wastewater after aerobic consumption.

[0008] The sedimentation and effluent module is used to settle the wastewater after secondary denitrification and phosphorus removal, and then discharge the sludge and effluent.

[0009] The carbon source replenishment module is used to provide carbon source in a targeted manner during the denitrification and phosphorus removal process;

[0010] The control module is used to control the progress of the secondary denitrification and phosphorus removal processes and the carbon source replenishment process based on the reaction indicators in the denitrification and phosphorus removal modules and the enhanced denitrification module.

[0011] Furthermore, the control module includes an ammonia nitrogen concentration detection component, a nitrate nitrogen concentration detection component, and a nitrite nitrogen concentration detection component installed in the nitrogen removal and phosphorus removal module and the enhanced nitrogen removal module;

[0012] When the ammonia nitrogen concentration in the denitrification and phosphorus removal module is lower than the set threshold or the nitrate nitrogen concentration is higher than the set threshold, the wastewater in the denitrification and phosphorus removal module is introduced into the enhanced denitrification module.

[0013] Furthermore, the nitrogen and phosphorus removal module adopts continuous aeration, and the aeration rate is controlled inversely according to the nitrite nitrogen concentration inside.

[0014] The enhanced denitrification module uses intermittent aeration, and the aeration rate is controlled proportionally to the ratio of ammonia nitrogen to nitrite nitrogen. Aeration is stopped when the ratio of ammonia nitrogen to nitrite nitrogen is less than the threshold value.

[0015] Furthermore, the denitrification and phosphorus removal modules and the enhanced denitrification module are similar in that they both include an outer cylinder, an inner cylinder, a flow guiding device, and an aeration device; the inner cylinder is connected to the outer cylinder and is divided into an inner reaction chamber located inside the inner cylinder and an outer reaction chamber located between the inner cylinder and the outer cylinder; the flow guiding device is connected to the axial bottom end of the inner cylinder; and the aeration device is installed inside the flow guiding device.

[0016] The difference is that the denitrification and phosphorus removal module uses a multi-stage vertical flow guide device and has a crushing device at the bottom; while the enhanced denitrification module uses a single-stage vertical flow guide device and does not have a crushing device at the bottom.

[0017] Furthermore, the denitrification and phosphorus removal modules and the enhanced denitrification module adopt a complete set of multi-stage vertical flow guiding devices, including: hollow connecting units and flow guiding units;

[0018] The connecting unit includes several units of different diameters; the upper diameter is used to connect to the inner cylinder of the sewage treatment equipment; the lower diameter is used to connect to the upper end of the diversion unit.

[0019] The flow guiding unit includes an inner inclined flow guiding section and an outer inclined flow guiding section; on the inclined surface of the inner inclined flow guiding section, a multi-stage sieve with gradually increasing size is provided as the height decreases;

[0020] Through holes are provided inside the inner and outer inclined flow guide sections;

[0021] The diameter of the through hole is larger than the diameter of the sieve hole.

[0022] Furthermore, the carbon source replenishment module includes:

[0023] The first and second branches have their inlets connected to the pretreatment module and their outlets connected to the nitrogen and phosphorus removal module and the enhanced nitrogen removal module, respectively.

[0024] The control module is used to introduce a carbon source from the pretreatment module when the nitrate concentration in the denitrification and phosphorus removal modules exceeds the nitrate threshold.

[0025] Furthermore, the carbon source replenishment module also includes:

[0026] The third branch has an inlet connected to the outlet of the sedimentation effluent module and an outlet connected to the nitrogen and phosphorus removal module.

[0027] The control module is also used to introduce a reflux carbon source from the sedimentation effluent module when the ammonia nitrogen concentration in the denitrification and phosphorus removal module is higher than the ammonia nitrogen threshold.

[0028] Furthermore, the pretreatment module includes: a filter assembly, a first outlet, a first aeration assembly, and a carbon source supply outlet;

[0029] The filter assembly is located at the water inlet of the pretreatment module;

[0030] The first outlet is located near the bottom of the pretreatment module and is connected to the aerobic module to overflow into the aerobic module;

[0031] The first aeration component is located at the bottom of the pretreatment module and aerates upwards.

[0032] The carbon source supply port is located on the upper part of the pretreatment module and is connected to the denitrification and phosphorus removal module and the enhanced denitrification module.

[0033] Furthermore, the aerobic module includes: an aerobic reaction chamber, a partition, a second aeration component, a biological packing area, and a second overflow port;

[0034] The baffle is located on one side of the first overflow port and extends from the top of the aerobic reaction chamber to the bottom of the aerobic reaction chamber; the bottom of the baffle is lower than the bottom of the biological packing area.

[0035] The second aeration component is located at the bottom of the aerobic reaction chamber and aerates upwards.

[0036] The biological packing zone is located between the partition and the aerobic reaction chamber, and above the second aeration component;

[0037] The second overflow outlet is located above the biological packing area.

[0038] On the other hand, the present invention also provides a low-carbon treatment process for high-ammonia nitrogen organic wastewater, using any of the above-mentioned low-carbon treatment equipment for high-ammonia nitrogen organic wastewater, the steps of which include:

[0039] S1: Wastewater first enters the pretreatment module for pretreatment, and in stages, part of the wastewater is introduced from the pretreatment module into the denitrification and phosphorus removal module and the enhanced denitrification module to supplement the carbon source;

[0040] S2: The pretreated wastewater is introduced into the aerobic module, where the amount of organic matter consumed through aerobic reaction is further reduced to obtain wastewater after aerobic consumption.

[0041] S3: After aerobic consumption, the wastewater is sequentially introduced into the denitrification and phosphorus removal module and the enhanced denitrification module, and the functional microorganisms are used for autotrophic denitrification and simultaneous phosphorus removal.

[0042] S4: The wastewater treated by autotrophic denitrification and simultaneous phosphorus removal is introduced into the sedimentation unit for sedimentation to determine whether the effluent meets the discharge or reuse standards. If the pollutant concentration does not meet the discharge or reuse standards, the effluent is reintroduced into the denitrification and phosphorus removal module for recycling. If the sedimented effluent meets the discharge or reuse standards, a portion of it is returned to the denitrification and phosphorus removal module, and the remainder is discharged as compliant effluent.

[0043] The core of the low-carbon treatment equipment and process for high ammonia nitrogen organic wastewater of the present invention lies in: 1. targeting the ammonia nitrogen content of high ammonia nitrogen wastewater (… Concentration > 50 mg / L, also contains nitrite nitrogen ( ) and nitrate nitrogen ( The system features a nitrogen and phosphorus removal module and an enhanced nitrogen removal module, forming a cascaded secondary nitrogen and phosphorus removal process, which can further improve the quality of the effluent; 2. The carbon source supply module can introduce carbon sources into the nitrogen and phosphorus removal module, and make directional and effective use of carbon sources in the reactor, so as to achieve low-carbon, high-efficiency, stable and energy-saving treatment of high ammonia nitrogen organic wastewater, and achieve the technical effect of high-efficiency purification while reducing energy consumption and carbon emissions. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art are briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort. In the drawings, the same parts use the same reference numerals. The drawings are not drawn to scale.

[0045] Figure 1 This is a schematic diagram of an embodiment of a low-carbon treatment device for high ammonia nitrogen organic wastewater according to the present invention;

[0046] Figure 2 This is a schematic diagram of one embodiment of a multi-stage vertical flow guide device according to the present invention;

[0047] Figure 3 This is a top view schematic diagram of an embodiment of the inner inclined flow guide section of a multi-stage vertical flow guide device according to the present invention;

[0048] Figure 4 This is a schematic diagram of the structure of an embodiment of the inner inclined guide plate located on the inner side of a multi-stage vertical flow guiding device according to the present invention;

[0049] Figure 5 This is a schematic diagram of another embodiment of the multi-stage vertical flow guide device of the present invention;

[0050] Figure 6 This is a schematic diagram of the propulsion section of a multi-stage vertical flow guide device according to the present invention;

[0051] Figure 7 This is a schematic diagram of an embodiment of the aerobic module of a low-carbon treatment device for high ammonia nitrogen organic wastewater according to the present invention. Detailed Implementation

[0052] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is referred to as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0054] It should also be noted that if the embodiments of the present invention involve directional indications, such as up, down, left, right, front, back, etc., these directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly. Furthermore, if the embodiments of the present invention involve descriptions such as "first," "second," "S1," "S2," "step one," "step two," etc., these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance, or implicitly indicating the number of technical features indicated or the order of method execution. Those skilled in the art will understand that anything that does not violate the inventive concept and does not contradict the inventive points should be included within the scope of protection of the present invention.

[0055] This invention provides a low-carbon treatment device for high ammonia nitrogen organic wastewater, such as... Figure 1 As shown, it includes: a pretreatment module 100, an aerobic module 200, a nitrogen and phosphorus removal module 300, an enhanced nitrogen removal module 400, a sedimentation effluent module 500, a carbon source supply module 600, and a control module connected in sequence.

[0056] The pretreatment module is used to physically intercept and settle wastewater to obtain pretreated wastewater;

[0057] The aerobic module is used to provide an aerobic environment, consume the organic matter in the pretreated wastewater, and obtain wastewater after aerobic consumption;

[0058] The denitrification and phosphorus removal modules and the enhanced denitrification module constitute a cascaded secondary denitrification and phosphorus removal system, which is used to perform cascaded secondary denitrification and phosphorus removal on wastewater after aerobic consumption.

[0059] The sedimentation and effluent module is used to settle the wastewater after secondary denitrification and phosphorus removal, and then discharge the sludge and effluent.

[0060] The carbon source replenishment module is used to provide carbon source in a targeted manner during the denitrification and phosphorus removal process;

[0061] The control module is used to control the progress of the secondary denitrification and phosphorus removal processes and the carbon source replenishment process based on the reaction indicators in the denitrification and phosphorus removal modules and the enhanced denitrification module.

[0062] In this embodiment, a low-carbon treatment device for high ammonia nitrogen organic wastewater according to the present invention is provided. The core of the device is: targeting the ammonia nitrogen content of high ammonia nitrogen wastewater (… Concentration > 50 mg / L, also contains nitrite nitrogen ( ) and nitrate nitrogen ( This technology innovatively improves traditional wastewater treatment equipment by addressing its key characteristics: 1. It eliminates anaerobic and limited-aquaculture processes while strengthening the denitrification process. It employs a denitrification and phosphorus removal module and an enhanced denitrification module to form a cascaded secondary denitrification and phosphorus removal process. Because the denitrification and phosphorus removal module, once it reaches its set target, will not achieve optimal results regardless of the reaction time extension, as phosphorus removal is essentially complete, it needs to be introduced into the enhanced denitrification module. At this point, phosphorus removal is minimal, and the focus is primarily on denitrification, further improving effluent quality. 2. Utilizing the inherent carbon source in high-ammonia-nitrogen organic wastewater, a carbon source replenishment module is added. This module introduces carbon sources into the denitrification and phosphorus removal modules and the enhanced denitrification module, enabling gradient and effective utilization of carbon sources in the reactor. This achieves low-carbon, high-efficiency, stable, and energy-saving treatment of high-ammonia-nitrogen organic wastewater, reducing energy consumption and carbon emissions while simultaneously achieving high-efficiency purification.

[0063] In summary, the technical concept of this invention lies in providing a solution for high-ammonia-nitrogen organic wastewater by abandoning anaerobic and limited-aluminum processes and instead implementing a cascaded secondary nitrogen and phosphorus removal process. Furthermore, it utilizes the organic matter in the wastewater to achieve targeted carbon source replenishment. While this solution appears to be a combination of existing technologies, it represents the inventor's creative choice. Based on this inventive concept, the inventor needs to conduct in-depth research on the following technical issues and provide several preferred embodiments:

[0064] 1. Question 1: The reactions in secondary denitrification and phosphorus removal are complex and involve many reaction indicators. Which indicator should be chosen as the judgment standard? That is, at what indicator in the denitrification and phosphorus removal module can the primary denitrification and phosphorus removal be completed, and the enhanced denitrification module can be introduced for secondary denitrification and phosphorus removal? Also, what are the differences in structure and control methods between the denitrification and phosphorus removal module and the enhanced denitrification module to achieve different task requirements and realize efficient secondary denitrification and phosphorus removal effects?

[0065] Preferably, the control module includes an ammonia nitrogen concentration detection component, a nitrate nitrogen concentration detection component, and a nitrite nitrogen concentration detection component disposed within the nitrogen removal and phosphorus removal module and the enhanced nitrogen removal module;

[0066] When the ammonia nitrogen concentration in the denitrification and phosphorus removal module is less than the set threshold or the nitrate nitrogen concentration is higher than the set threshold, the wastewater in the denitrification and phosphorus removal module is introduced into the enhanced denitrification module.

[0067] The nitrogen and phosphorus removal module uses continuous aeration, and the aeration rate is controlled inversely according to the concentration of nitrite nitrogen in it.

[0068] The enhanced denitrification module uses intermittent aeration, and the aeration rate is controlled proportionally to the ratio of ammonia nitrogen to nitrite nitrogen. Aeration is stopped when the ratio of ammonia nitrogen to nitrite nitrogen is less than the threshold value.

[0069] This embodiment provides a preferred embodiment for controlling the denitrification and phosphorus removal modules and the enhanced denitrification module. On the one hand, when the ammonia nitrogen concentration in the denitrification and phosphorus removal module is less than a set threshold or the nitrate nitrogen concentration is higher than a set threshold, it indicates that the phosphorus removal task of the denitrification and phosphorus removal module has been basically completed, that is, the primary denitrification and phosphorus removal process is over. At this time, it is the most effective time to introduce the wastewater into the enhanced denitrification module for secondary denitrification and phosphorus removal. Effectively controlling the time and reaction process of cascade denitrification and phosphorus removal can avoid introducing the wastewater from the denitrification and phosphorus removal module into the enhanced denitrification module too early, resulting in insufficient primary denitrification and phosphorus removal, and can also avoid introducing the wastewater from the denitrification and phosphorus removal module into the enhanced denitrification module too late, resulting in prolonged reaction time with little practical effect and reduced denitrification and phosphorus removal efficiency. On the other hand, since the influent and task requirements of the denitrification and phosphorus removal module and the enhanced denitrification module are different, even if their structures are the same, their control indicators are completely different. The most critical indicator is flow rate control, because the granular sludge in the denitrification and phosphorus removal module and the enhanced denitrification module... Functional microorganisms undergo complex reactions, and the internal and external circulation rates determine their residence time in different areas and reaction processes. Strictly controlling the flow rate through aeration is crucial for ensuring the successful completion of different tasks in the denitrification and phosphorus removal modules and the enhanced denitrification module. Controlling the aeration rate based on the reaction indicators within these modules is not a conventional approach. Specifically: For the denitrification and phosphorus removal module with a heavy load, continuous aeration is used, with the aeration rate controlled inversely based on the nitrite concentration. When the nitrite concentration exceeds a certain threshold, the aeration rate is reduced to a minimum to match the continuous phosphorus removal process until the preset indicators for entering the enhanced denitrification module are met. For the enhanced denitrification module with a light load, intermittent aeration is used. Initially, the aeration rate is controlled directly based on the ammonia nitrogen to nitrite ratio to continuously adapt to the granular sludge growth process. When the ammonia nitrogen to nitrite ratio falls below a preset threshold, aeration is stopped to slow the process until the wastewater is introduced into the next sedimentation effluent module.

[0070] 2. Question 2: Due to the different influent and task requirements of the two denitrification and phosphorus removal modules, the denitrification and phosphorus removal modules and the enhanced denitrification module need to be structurally adapted.

[0071] Preferably, the denitrification and phosphorus removal module and the enhanced denitrification module are similar in that they both include an outer cylinder, an inner cylinder, a flow guiding device, and an aeration device; the inner cylinder is connected to the outer cylinder and is divided into an inner reaction chamber located inside the inner cylinder and an outer reaction chamber located between the inner cylinder and the outer cylinder; the flow guiding device is connected to the axial bottom end of the inner cylinder; the aeration device is installed inside the flow guiding device; the difference is that the denitrification and phosphorus removal module adopts a multi-stage vertical flow guiding device and a crushing device is installed below; the enhanced denitrification module adopts a single-stage vertical flow guiding device and no crushing device is installed below.

[0072] In this embodiment, a preferred embodiment of two-stage denitrification is given. The purpose of this design is that the denitrification and phosphorus removal module has a large denitrification and phosphorus removal load, which requires an extended internal circulation time. The multi-stage structure is adopted, and the particles are larger, so a crushing device needs to be set at the bottom to crush and refine the particles, thereby increasing the exposure area of ​​inorganic matter and improving the ammonia nitrogen reaction effect.

[0073] To accommodate the multi-stage structure of the nitrogen and phosphorus removal module, while the enhanced nitrogen removal module employs a single-stage structure, as a second inventive point of this invention, a complete set of multi-stage vertical flow guiding devices is provided. These devices can be freely combined to form multi-stage and single-stage flow guiding devices based on the particle size in the nitrogen and phosphorus removal module, i.e., the specific wastewater conditions. Figure 2-6 As shown, it includes: a hollow connecting unit A and a flow guiding unit;

[0074] The connecting unit includes several units of different diameters; the upper diameter A1 is used to connect to the inner cylinder of the sewage treatment equipment; the lower diameter A2 is used to connect to the upper end of the diversion unit.

[0075] The flow guiding unit includes: an inner inclined flow guiding part 1 and an outer inclined flow guiding part 2; on the inclined surface of the inner inclined flow guiding part, a multi-stage sieve with gradually increasing size is provided as the height decreases;

[0076] Through holes are provided inside the inner and outer inclined flow guide sections;

[0077] The diameter of the through hole is larger than the diameter of the sieve hole.

[0078] In this embodiment, a multi-stage vertical flow guiding device is provided. Before treating wastewater, inner and outer inclined flow guiding sections with appropriate screen aperture sizes are selected and assembled according to different types of wastewater to form a flow guiding unit adapted to the particle size distribution of the wastewater. For example, the particle size distribution in the wastewater is as follows: clear liquid, flocculent sludge (the particle size of flocculent sludge is smaller than that of small granular sludge), small-diameter granular sludge, and large-diameter granular sludge. Large-diameter granular sludge is blocked by the multi-stage sieve group on the inner inclined guide section, thus circulating along the outer side of the inner cylinder, the outer side of the inner inclined guide section, the outer side of the outer inclined guide section, and the through hole, along the first circulation path. Simultaneously, anaerobic ammonia oxidation occurs, removing the corresponding pollutants. Meanwhile, the clear liquid, flocculent sludge, and small-diameter granular sludge are further separated at the inner inclined guide section. The clear liquid enters the inner cylinder immediately through the uppermost, smallest-sized first-stage sieve, while the flocculent sludge and small-diameter granular sludge sequentially enter the through hole of the inner inclined guide section along different lower-level sieves, carrying out internal circulation. In other words, the clear liquid and flocculent sludge... Although both sludge and small-diameter granular sludge are guided into the internal circulation through the inward inclined guide section, they undergo gradient screening based on particle size through multi-stage sieves. They circulate and grow in layers according to different circulation paths. The smaller the particle size of the granular sludge, the shorter the circulation path and the faster the circulation speed, which can accelerate its growth into large-diameter granular sludge. Furthermore, it attaches and cultivates corresponding functional microorganisms, improving the circulation efficiency of granular sludge according to different particle sizes. After growing into large granular sludge, the large granular sludge undergoes an anaerobic ammonia oxidation reaction at the outward inclined guide section, removing the corresponding pollutants in the wastewater and greatly improving the wastewater treatment effect. In summary, this application provides a complete set of multi-stage vertical flow guiding devices. The key is that, since it needs to adapt to different types of sewage, complete the gradient screening and stratified circulation of sewage according to the particle size of sludge particles, and realize the cultivation of specific functional microorganisms to further improve the sewage treatment effect, it is necessary to select inner inclined flow guiding parts and outer inclined flow guiding parts with different sizes of multi-stage sieve holes to form a suitable flow guiding unit. The technical problem to be solved is that different diameter connecting units are needed to connect the inner inclined flow guiding parts of different sizes to the upper inner cylinder, thereby forming the whole flow guiding device. This is the core of the flow guiding device of this application.

[0079] More preferably, the same-stage sieve holes on the inclined surface of the inner inclined guide section are evenly distributed circumferentially along the inclined surface. This allows granular sludge of the corresponding particle size range to pass through the inner inclined guide section evenly in the circumferential direction, and then enter the inner reaction chamber for circulation, further improving the stratified circulation effect and avoiding turbulence.

[0080] For example, the aperture of the topmost sieve in the uppermost inclined guide section is 0.1 cm, and the aperture of each sieve below it increases sequentially until it reaches a maximum of 0.2 cm.

[0081] The diameter of the uppermost sieve hole in the next layer of the inner inclined guide section is 0.2 cm, and the diameter of each sieve hole increases sequentially downwards until it reaches a maximum of 0.3 cm;

[0082] The diameter of the uppermost sieve hole in the next layer of the inner inclined guide section is 0.3 cm, and the diameter of the sieve holes in each subsequent layer increases until the maximum is 0.4 cm.

[0083] The diameter of the uppermost sieve hole in the next layer of the inner inclined guide section is 0.4 cm, and the diameter of the sieve holes in each subsequent layer increases until the maximum is 0.5 cm.

[0084] The sieve holes on the flow guiding components in the next layer are all 0.5 cm.

[0085] In this embodiment, the sieve openings (0.1–0.2 cm) of the uppermost inclined guide section preferentially trap flocculent sludge and small granular sludge for rapid circulation and growth. Once the particles grow to a size greater than 0.2 cm, they naturally settle to the next layer (0.2–0.3 cm) and continue circulating. As the particle size further increases to greater than 0.3 cm, the particles continue to sink into the next layer (0.3–0.4 cm), until the largest particles circulate at the bottom layer (0.5 cm). This achieves a continuous, graded, and layered cyclic growth process for granular sludge, from flocculent sludge and small granular sludge to large granular sludge. Small granular sludge has a short circulation path and high circulation speed in the upper guide component, accelerating adsorption, collision, and growth rates, rapidly growing into large particles. Small-diameter granular sludge grows layer by layer along the guide component, ensuring a reasonable distribution of particles of different sizes at different heights, resulting in a uniform and stable flow field and avoiding turbulence.

[0086] More preferably, in the multi-stage vertical flow guiding device, the flow guiding unit includes multiple layers of inner inclined flow guiding parts and at least one layer of outer inclined flow guiding parts; each layer of inner inclined flow guiding parts is provided with the same or different levels of sieve holes; the sieve hole diameter on the lower layer of inner inclined flow guiding parts is larger than the sieve hole diameter on the upper layer of inner inclined flow guiding parts.

[0087] In this embodiment, the sieve holes on the multi-layered inclined guide section further divide granular sludge within a certain particle size range according to particle size, and correspondingly lengthen the path of the granular sludge, thereby enabling stratified circulation in different levels of liquid flow. Compared to a single-layered inclined guide section, the multi-layered inclined guide section achieves more levels of liquid flow path division within a limited space, further improving the circulation efficiency of granular sludge. This is particularly suitable for situations with high sludge concentration and extremely fine particle size; the multi-layered connected inclined guide section further improves screening efficiency and circulation effect. Figure 5As shown, when using the external inclined guide section for transition, taking the structure of the first layer of internal inclined guide section 11-first layer of external inclined guide section 21-second layer of internal inclined guide section 12-second layer of external inclined guide section 22-third layer of internal inclined guide section 13-third layer of external inclined guide section 23 as an example, the granular sludge can be screened, circulated and grown when passing through each layer of internal inclined guide section, and then slowly falls on the next layer of external inclined guide section, and then enters the next layer of internal inclined guide section, and undergoes stratified circulation and growth again, and so on, until it grows into large granular sludge that cannot pass through all the sieve holes; avoiding the clogging of the granular sludge at the sieve holes during the circulation process, the transition of the external inclined guide section can control the circulation volume and circulation time of the granular sludge, thereby achieving efficient graded circulation and granular cultivation effect. Under this multi-layer, multi-stage design, the number of layers, reaction height, and screen aperture size of each level of the inner and outer inclined guide sections can be flexibly adjusted according to different water qualities, sludge concentrations, and particle sizes. This allows for the screening of particles of different sizes along the circulation path and control of particle residence time, adapting to different working conditions.

[0088] More preferably, the inner inclined guide sections of each layer are directly connected end to end or are connected via an outer inclined guide section.

[0089] At least one external oblique guide is provided after the inner oblique guide section at the end.

[0090] In this embodiment, the connection relationship between the various levels of the inward inclined guide sections is further refined. By setting direct end-to-end connections between the inward inclined guide sections, the wastewater flow can quickly form a more detailed stratified circulation based on particle size among the multiple layers of inward inclined guide sections, accelerating the internal circulation time and increasing particle growth rate. When the inward inclined guide sections are connected via outward inclined guide sections, the local flow velocity can be further adjusted to extend the circulation time of sludge particles of different sizes. This allows the functional microorganisms contained within or attached to the sludge particles to continuously grow during their growth process, achieving a better circulation effect. Specifically, whether the inward inclined guide sections are directly connected end-to-end or connected via outward inclined guide sections can be arbitrarily adjusted according to the specific particle size of the sludge particles and the time required for particle growth. When accelerated internal circulation is needed, direct connection is possible; when extended reaction time is needed, connection via outward inclined guide sections is possible. This flexible design can further match the actual situation of the current reaction. Based on this, the anaerobic ammonia oxidation microorganisms attached to the large-diameter sludge particles in the external inclined guide section at the end can slowly fall down along the external inclined guide section and fully complete the anaerobic ammonia oxidation reaction, thus achieving a better denitrification effect.

[0091] More preferably, in the multi-layered inwardly inclined guide section, the height of the inwardly inclined guide section of the upper layer is less than the height of the inwardly inclined guide section of the lower layer; the height of the outwardly inclined guide section of the upper layer is less than the height of the outwardly inclined guide section of the lower layer; and the inward tilt angle of the inwardly inclined guide section of the upper layer is greater than the inward tilt angle of the inwardly inclined guide section of the lower layer.

[0092] In this embodiment, the specific height and inclination angle settings are adjusted according to the reaction process, rather than being conventional technical choices. 1. Height variation: The lower layer of the inclined guide section is higher than the upper layer because as particles increase in size, the required reaction time also increases, meaning the internal circulation time needs to be lengthened. This height variation further differentiates the length of the circulation path for granular sludge of different particle sizes, improving the circulation effect and growth rate of the granular sludge. 2. Inclination angle variation: The inward inclination angle of the inclined guide section increases sequentially from top to bottom, gradually increasing the space between this layer of the inclined guide section and the sidewall of the reaction vessel. This provides greater reaction space for particles with larger particle sizes, increases the overall wastewater flow space, and reduces the risk of large-diameter granular sludge accumulation in the flow channel. Overall, this design can further lengthen the circulation path of granular sludge with a wider particle size range, further increase the number of screening layers and the difference in circulation path length, and improve the circulation effect and growth rate of the granular sludge.

[0093] More preferably, the inner inclined guide section includes a double-layered nested inner inclined guide plate that can rotate relative to each other; each inner inclined guide plate has a multi-stage sieve hole at a corresponding position.

[0094] In this embodiment, the inner inclined guide section is further defined as a double-layer nested structure, including an inner plate 11a and an outer plate 11b. By rotating the inner or outer inner inclined guide plate, the overlapping area of ​​the screen holes can be changed, thereby synchronously adjusting the aperture of the multi-stage screen holes to adapt to wastewater with different sludge concentrations and improve the applicability of the device.

[0095] More preferably, in the double-nested and relatively rotatable inner inclined guide vanes, the inner inclined guide vane on the inner side is an integral structure, while the inner inclined guide vane on the outer side is a segmented structure in the vertical direction.

[0096] For example, such as Figure 4As shown, when the multi-stage sieve holes include a first-stage sieve hole 311, a second-stage sieve hole 312, a third-stage sieve hole 313, and a fourth-stage sieve hole 314 arranged sequentially from top to bottom, the inner inclined guide plate 11b located on the inner side is also divided into four sections, including: a first segment structure 111, a second segment structure 112, a third segment structure 113, and a fourth segment structure 114, which correspond to the first-stage sieve hole 311, the second-stage sieve hole 312, the third-stage sieve hole 313, and the fourth-stage sieve hole 314, respectively. When it is necessary to adjust the aperture size of any first-stage sieve hole, it is only necessary to rotate the corresponding segment structure, which does not affect the size of the sieve holes in the other stages, thereby improving the adjustment accuracy of the device and further improving the adjustment range of the guide device.

[0097] More preferably, such as Figure 5 , Figure 6 As shown, the multi-stage vertical flow guide device also includes a flow propulsion section 3, which is disposed at the end of one or more inner inclined flow guide sections;

[0098] The propulsion unit 3 includes: a propulsion base plate 31, a propulsion housing 32, a propulsion main shaft 33, a propulsion impeller 34, and a propulsion drive component 35;

[0099] A flow-pushing base plate is located at the bottom end of the inner inclined flow guide section;

[0100] The jet propulsion housing is mounted on the jet propulsion base plate;

[0101] The main propulsion shaft is located in the middle of the propulsion housing;

[0102] The impeller blades and the drive components are nested outside the main shaft.

[0103] In this embodiment, a propulsion section can be optionally provided at the end of the inclined guide section within each layer. This allows for determining whether to increase the propulsion force and raise the inward negative pressure at that location based on the particle size required to be introduced by the inclined guide section, thus enabling faster intake of particles of the corresponding size. Furthermore, the internal circulation time at that location can be controlled based on the specific growth time required for the particles, achieving a more suitable particle growth path and time. A specific structure for the propulsion section is also provided, where the propulsion shell and propulsion base plate primarily serve a supporting function. The propulsion drive component drives the propulsion main shaft to rotate, thereby causing the blades nested on the propulsion main shaft to rotate. On the one hand, the continuously rotating impeller blades push the wastewater upwards, accelerating the upward flow velocity of the wastewater. In the wastewater granular sludge system, the sludge particles carried in the wastewater fluid rise rapidly along the direction of fluid movement, and a lateral negative pressure is formed at the multi-stage sieve openings, driving and accelerating the granular sludge to complete the circulation. On the other hand, the continuous collision and impact of the impeller blades with the wastewater causes the tiny bubbles carried by the granular sludge to separate under the action of turbulence and mutual collision. After degassing, the granular sludge can better collide or adsorb with dissolved substances in a turbulent mixed state. The propulsion section can solve the problems of insufficient circulation power of the mixed liquid, low upward flow velocity of granular sludge, and difficulty in separating tiny bubbles carried by granular sludge in the flow guiding device, thereby increasing the propulsion velocity of the solution, shortening the circulation time of the liquid flow, and improving the wastewater treatment rate.

[0104] More preferably, the bottom plate 31 and the shell 32 are in the shape of a trapezoidal frustum; the lower edge of the trapezoidal frustum is flush with the end of the inner inclined guide section 1; the upper edge of the trapezoidal frustum is lower than the position of the sieve hole 30 on the inner inclined guide section 1.

[0105] In this embodiment, a preferred embodiment of the pusher plate and pusher shell is provided. The circular base plate + trapezoidal frustum design allows the pusher device to fit snugly against the inner surface of the inner inclined guide section, ensuring a sealed structure between them. When combined with the aeration device to push upwards, it can generate a stronger negative pressure, continuously drawing in clear liquid, flocculent sludge, and fine-particle sludge through the screen holes for internal circulation, further improving the diversion and purification effect. The upper edge height of the pusher section does not exceed the position of the lowest level screen hole in the multi-stage screen, i.e., the height of the pusher section does not exceed the position of the lowest screen hole. In this way, when the pusher section pushes upwards, it can generate a negative pressure effect at the multi-stage screen hole position, promoting the effective intake of granular sludge without blocking the granular sludge from entering through the screen holes, while reducing disturbance to the stratified circulation path of granular sludge, further improving the circulation efficiency of granular sludge. It is worth noting that the screen apertures are larger towards the bottom, allowing for the passage of larger granular sludge particles. The plugging section has a stronger pushing ability for larger granular sludge particles, accelerating their circulation. Simultaneously, the inward-sloping configuration of the internally inclined guide section ensures that granular sludge particles of different sizes flow at different speeds, resulting in automatic stratified flow during vertical circulation. This allows for the continuous circulation and growth of both granular and flocculent sludge, achieving efficient stratified utilization of granular sludge.

[0106] More preferably, the vertical spacing between each sieve aperture increases as the height of the inner inclined guide section decreases.

[0107] In this embodiment, the screen hole spacing is further increased as the height decreases. On the one hand, as the particle size increases, the internal circulation time can be gradually lengthened to allow for full reaction. On the other hand, the stratification spacing of granular sludge with different particle size ranges is larger, and the stratification circulation path of granular sludge with different particle size ranges is also longer. This avoids granular sludge blockage or flow obstruction caused by excessively dense screen holes, and further improves the stratification circulation effect.

[0108] For example, when the vertical flow guiding device is set inside the circular outer cylinder, the lower edge dimension (inner diameter) of each layer of inner inclined guiding part and the upper edge dimension of each layer of outer inclined guiding part are taken as integers (in centimeters) of 1 / 5 to 1 / 3 of the inner diameter of the reactor outer cylinder, which is suitable for the new type of vertical flow reactor. From top to bottom, the upper edge dimension (inner diameter) of the inner inclined guide section of the first layer is twice its lower edge dimension; the upper edge dimension (inner diameter) of the inner inclined guide section of the nth layer (n is an integer greater than 1, and no more than 9) is the same as the lower edge dimension of the outer inclined guide section of the (n-1)th layer; the lower edge dimension (inner diameter) of the outer inclined guide section of the bottom layer is twice its upper edge dimension; the upper edge dimension (inner diameter) of the inner inclined guide section of the second to fifth layers is an integer (in centimeters) of 1.8, 1.6, 1.4, and 1.2 times its lower edge dimension, respectively; the upper edge dimension (inner diameter) of the inner inclined guide section of the sixth to ninth layers is an integer (in centimeters) of 1.2, 1.4, 1.6, and 1.8 times its lower edge dimension, respectively.

[0109] Preferably, a first fixing ring hole is provided on the outer side of the uppermost inner inclined guide section and the outer side of the lowermost outer inclined guide section, and the two sections are fixedly connected to the outside through the first fixing ring hole; a second fixing ring hole is provided at the connection point of each layer of guide components, and the layers of guide components are flexibly connected through the second fixing ring hole. This makes the multi-layer guide components easy to disassemble and assemble, and maintains the balance and shape of each layer.

[0110] On the other hand, this application also provides an assembly method using the above-mentioned arbitrary multi-stage vertical flow guide device, comprising:

[0111] S1: Obtain the particle size distribution of the granular sludge from the wastewater to be treated;

[0112] S2: Determine the required sieve aperture combination based on the particle size distribution of granular sludge, and select the required inner inclined guide section and outer inclined guide section based on the sieve aperture combination;

[0113] S3: Assemble the inner and outer inclined flow guides of each layer;

[0114] S4: Based on the lower diameter of the inner cylinder to be connected and the upper diameter of the uppermost inclined guide section after assembly, select a suitable connecting unit to connect and complete the assembly of the multi-stage vertical guide device.

[0115] This embodiment presents an assembly method for a multi-stage vertical flow guiding device. This method allows for flexible selection of inner and outer inclined flow guiding sections based on the particle size distribution of granular sludge in the wastewater to be treated, enabling customized assembly of the multi-stage vertical flow guiding device. On one hand, by matching the selected sieve hole combination in the inner inclined flow guiding section with the particle size of the granular sludge, stratified circulation of the granular sludge can be effectively achieved, promoting the gradual aggregation of small-diameter particles into larger-diameter particles and facilitating the aggregation and growth of microorganisms in the granular sludge. On the other hand, based on the combination of multiple layers of inner and outer inclined flow guiding sections, the circulation path length and circulation time of granular sludge with different particle sizes can be adjusted to achieve better circulation effects and the cultivation effect of functional microorganisms.

[0116] In summary, the second inventive point of this invention is presented, providing a complete set of multi-stage vertical flow guiding devices and their assembly method. When adapted to the denitrification and phosphorus removal modules and the enhanced denitrification module, based on the traditional denitrification and phosphorus removal structure, multi-stage flow guiding devices and single-stage flow guiding devices can be assembled according to the actual situation of high ammonia nitrogen organic wastewater, namely the denitrification and phosphorus removal modules and the enhanced denitrification module in the low-carbon treatment equipment for high ammonia nitrogen organic wastewater of this application, to complete different task requirements.

[0117] 3. Question 3: When and from where should each nitrogen and phosphorus removal module introduce carbon sources to achieve targeted carbon source replenishment? Preferably, such as... Figure 1 As shown, the carbon source replenishment module 600 includes:

[0118] The first branch 610 and the second branch 620 have inlets connected to the pretreatment module and outlets connected to the denitrification and phosphorus removal module and the enhanced denitrification module, respectively; they are used to introduce a supercharged carbon source from the pretreatment module when the nitrification and phosphorus removal module and the enhanced denitrification module exceed the nitrification threshold.

[0119] The third branch, 630, has its inlet connected to the outlet of the sedimentation effluent module and its outlet connected to the denitrification and phosphorus removal module; it is used to introduce a reflux carbon source from the sedimentation effluent module when the ammonia nitrogen concentration in the denitrification and phosphorus removal module is higher than the ammonia nitrogen threshold.

[0120] This embodiment presents a preferred embodiment for targeted carbon source replenishment. The first and second branches are bypass pipelines. When the nitrate nitrogen concentration in the two denitrification and phosphorus removal modules exceeds the nitrate nitrogen threshold, the digestate of organic matter is introduced from the pretreatment module to introduce a higher concentration of bypass carbon source, further improving the denitrification and phosphorus removal efficiency. Furthermore, due to the high load of the denitrification and phosphorus removal modules, when their ammonia nitrogen concentration exceeds the ammonia nitrogen threshold, an additional lower concentration of return carbon source is introduced from the sedimentation effluent module to further reduce the nitrogen load, achieving the goal of low-carbon, high-efficiency, stable, and energy-saving treatment of high-ammonia nitrogen organic wastewater. The timing and path of this carbon source replenishment are not conventional technical choices, but rather important selections made by the inventors based on the actual reaction conditions in each region. The pretreatment module provides a higher concentration of bypass carbon source, while the sedimentation effluent module provides a lower concentration of return carbon source, achieving targeted carbon source replenishment to adapt to each process of high-ammonia nitrogen organic wastewater treatment.

[0121] In summary, this invention provides a low-carbon treatment device for high-ammonia nitrogen organic waste, particularly for wastewater with high ammonia nitrogen concentrations. Wastewater with high ammonia nitrogen concentrations has a low number of functional microorganisms, making direct biological denitrification and phosphorus removal difficult. Direct dilution with water would generate even more wastewater, causing greater pollution. Furthermore, existing microbial reaction systems fail to effectively utilize organic matter and carbon sources in the wastewater to promote microbial growth; the reaction process is crude and fails to achieve satisfactory wastewater treatment results, which is inconsistent with the green and low-carbon development concept. This application addresses the above-mentioned technical problems by providing a low-carbon treatment device for high-ammonia nitrogen organic waste, which, when used:

[0122] The pretreatment module pre-treats the imported high-ammonia-nitrogen organic wastewater by physically intercepting and settling it to remove solid waste. Optionally, aeration is performed using the first aeration component (described later) to initially oxidize the organic matter in the wastewater and homogenize it through aeration and stirring (for example, when the time interval between wastewater introductions to the pretreatment module is long and the concentration of different batches of wastewater varies greatly, the concentrations of ammonia nitrogen and organic matter in the wastewater may differ), thus avoiding the technical problem of poor device stability caused by inconsistent concentrations of ammonia nitrogen and organic matter in the wastewater. The wastewater is then introduced into the aerobic module, where functional microorganisms (such as aerobic and facultative microorganisms) react with the organic matter in an aerobic environment, reducing the ratio of organic matter to ammonia nitrogen. After passing through the pretreatment unit, the wastewater is introduced into the denitrification and phosphorus removal module. This unit controls the aeration intensity to form a stable granular sludge structure in the reaction system. Utilizing the multi-layered microenvironmental characteristics of granular sludge, anaerobic ammonia oxidation and denitrification reactions can be simultaneously achieved within the same system. The required organic carbon source comes directly from the organic matter in the wastewater of the pretreatment module, eliminating the need for additional external carbon sources. This enables gradient distribution and efficient utilization of organic matter, aligning with the low-carbon and green development trend. Simultaneously, a portion of the effluent from the sedimentation module (with relatively low concentrations of ammonia nitrogen, total phosphorus, and free nitrogen) is recycled to the nitrogen and phosphorus removal module. This not only dilutes the ammonia nitrogen concentration in the influent, alleviating the load pressure on microorganisms, but also enhances the activity and stability of microorganisms in the system. This process does not increase the wastewater volume, ensuring the overall economic efficiency and environmental friendliness of the system. The wastewater is then introduced into the enhanced denitrification module. This module controls aeration to maintain dissolved oxygen, granular sludge particle size, and flow velocity within a preset range. Similar to the denitrification and phosphorus removal modules, it utilizes the organic matter from the pretreatment module as a carbon source for further carbon source utilization. It also controls the reaction time of the wastewater in the denitrification and phosphorus removal modules and the enhanced denitrification module to achieve better removal rates of nitrogen, phosphorus, and organic matter. After being treated sequentially by the denitrification and phosphorus removal modules and the enhanced denitrification module, the wastewater enters the sedimentation effluent module for solid-liquid separation. If the concentrations of pollutants such as nitrogen, phosphorus, and organic matter in the sedimentation effluent still do not meet the discharge or reuse standards, this portion of the effluent is reintroduced into the denitrification and phosphorus removal module for repeated circulation until the water quality meets the standards. If the sedimentation effluent meets the discharge or reuse standards, a portion is returned to the denitrification and phosphorus removal module to maintain the carbon and nitrogen source balance and microbial activity in the system; the remaining portion is discharged or reused as compliant effluent. In summary, this application provides a low-carbon treatment device for high ammonia nitrogen organic waste, which can treat high ammonia nitrogen organic wastewater in a low-carbon, efficient, stable, and energy-saving manner.

[0123] More preferably, such as Figure 1 As shown, the pretreatment module 100 includes: a filter assembly 110, a first outlet 120, a first aeration assembly 130, and a carbon source supply port 140.

[0124] The filter assembly is located at the water inlet of the pretreatment module;

[0125] The first outlet is located near the bottom of the pretreatment module and is connected to the aerobic module to overflow into the aerobic module;

[0126] The first aeration component is located at the bottom of the pretreatment module and aerates upwards.

[0127] The carbon source supply port is located on the upper part of the pretreatment module and is connected to the denitrification and phosphorus removal module and the enhanced denitrification module.

[0128] In this embodiment, by setting a filter component at the water inlet of the pretreatment module, large particulate suspended solids and impurities in the influent can be effectively intercepted, avoiding clogging and reducing the load on subsequent treatment units. The first aeration component set at the bottom of the pretreatment module aerates upwards, providing dissolved oxygen in the initial stage of water intake, promoting the dispersion and preliminary oxidation of pollutants, while forming an upward water flow to prevent sedimentation and improve water quality uniformity. The first outlet is connected to the aerobic module, ensuring that the pretreated water flows stably into the aerobic reaction zone, thereby improving the efficiency of subsequent microbial metabolism and pollutant removal. The carbon source supply port set at the top of the pretreatment module is connected to the denitrification and phosphorus removal module and the enhanced denitrification module, providing a carbon source for the denitrification and phosphorus removal module and the enhanced denitrification module.

[0129] Preferred, such as Figure 7 As shown, the aerobic module 200 includes: an aerobic reaction chamber 210, a partition 220, a second aeration component 230, a biological packing area 240, and a second overflow port 250.

[0130] The baffle is located on one side of the first overflow port and extends from the top of the aerobic reaction chamber to the bottom of the aerobic reaction chamber; the bottom of the baffle is lower than the bottom of the biological packing area.

[0131] The second aeration component is located at the bottom of the aerobic reaction chamber and aerates upwards.

[0132] The biological packing zone is located between the partition and the aerobic reaction chamber, and above the second aeration component;

[0133] The second overflow outlet is located above the biological packing area.

[0134] In this embodiment, the aerobic module forms segmented water flow channels by setting a partition extending from the top to the bottom, with the bottom lower than the biological packing zone. This extends the residence time of water in the reaction chamber, prevents short-circuiting, and improves the removal efficiency of ammonia nitrogen and organic matter. The second aeration component at the bottom aerates upwards, providing sufficient dissolved oxygen for aerobic microorganisms and enhancing water mixing to ensure uniform oxygen distribution. The biological packing zone between the partition and the reaction chamber provides an attachment carrier for aerobic microorganisms, increasing the microbial concentration and the contact area with pollutants, further improving the removal effect. The second overflow outlet is located above the biological packing zone, which can stably discharge the treated water, ensuring uniform effluent quality and providing a stable water volume for downstream units.

[0135] Preferably, the sedimentation effluent module includes: an inclined tube sedimentation assembly 510 and a third overflow port 520 disposed above the inclined tube sedimentation assembly.

[0136] In this embodiment, the sedimentation effluent module achieves rapid sludge settling and a significant reduction in suspended solids content in the effluent through the inclined tube sedimentation component, resulting in clear effluent. The third overflow port at the top can return a portion of the compliant or non-compliant water to the denitrification and phosphorus removal module to maintain microbial activity and dilute high ammonia nitrogen wastewater, thereby improving denitrification and phosphorus removal efficiency and ensuring stable system operation.

[0137] This application also provides a low-carbon treatment process for high-ammonia nitrogen organic wastewater, employing any of the above-mentioned low-carbon treatment equipment for high-ammonia nitrogen organic wastewater, the steps of which include:

[0138] S1: Wastewater first enters the pretreatment module for pretreatment, and in stages, part of the wastewater is introduced from the pretreatment module into the denitrification and phosphorus removal module and the enhanced denitrification module to supplement the carbon source;

[0139] S2: The pretreated wastewater is introduced into the aerobic module, where the amount of organic matter consumed through aerobic reaction is further reduced to obtain wastewater after aerobic consumption.

[0140] S3: After aerobic consumption, the wastewater is sequentially introduced into the denitrification and phosphorus removal module and the enhanced denitrification module, and the functional microorganisms are used for autotrophic denitrification and simultaneous phosphorus removal.

[0141] S4: The wastewater treated by autotrophic denitrification and simultaneous phosphorus removal is introduced into the sedimentation unit for sedimentation to determine whether the effluent meets the discharge or reuse standards. If the pollutant concentration does not meet the discharge or reuse standards, the effluent is reintroduced into the denitrification and phosphorus removal module for recycling. If the sedimented effluent meets the discharge or reuse standards, a portion of it is returned to the denitrification and phosphorus removal module, and the remainder is discharged as compliant effluent.

[0142] This embodiment presents a low-carbon treatment process for high-ammonia nitrogen organic wastewater. In use, a pretreatment module performs preliminary pretreatment of the wastewater, removing larger particles and suspended solids, reducing the load on subsequent units. The aerobic module further degrades organic matter (COD) through microbial metabolism, significantly reducing the organic load on the water body. A two-stage denitrification and phosphorus removal module utilizes functional microorganisms for autotrophic denitrification and simultaneous phosphorus removal, achieving ammonia nitrogen (… This process achieves efficient removal of total nitrogen (TN) and total phosphorus (TP). The key to this technology lies in the pretreatment module, which retains some biodegradable organic matter in the wastewater through initial sedimentation and conditioning. This organic matter is then introduced as a carbon source into the denitrification and phosphorus removal modules, achieving secondary denitrification and phosphorus removal. Simultaneously, by exceeding or reusing the carbon source, the autotrophic denitrification and phosphorus removal functional microorganisms receive appropriate organic carbon supplementation in different units, optimizing microbial metabolic efficiency and achieving low-cost, green organic carbon utilization. On the other hand, the sedimentation effluent module removes flocs and suspended solids, resulting in clear effluent with reduced pollutant concentrations. The sedimentation unit reuses some compliant effluent or wastewater that has undergone denitrification and phosphorus removal treatment but has not yet met standards. This dilutes the ammonia nitrogen concentration in the wastewater entering the denitrification and phosphorus removal modules, forming a suitable ammonia nitrogen gradient. The diluted ammonia nitrogen concentration is more suitable for the metabolic activities of autotrophic denitrification microorganisms. The effluent reuse forms a buffer, smoothing fluctuations in influent water quality and ensuring stable denitrification and phosphorus removal performance even under high load conditions. Reusing effluent not only saves external water resources but also optimizes wastewater quality through dilution, improving nitrogen and phosphorus removal efficiency while balancing economic and environmental benefits. It is worth noting that wastewater discharge or reuse standards, especially the concentration ranges for nitrogen, phosphorus, and organic matter discharge standards, can refer to national standards or be specified by those skilled in the art.

[0143] The aforementioned low-carbon treatment process for high-ammonia nitrogen organic wastewater is based on the aforementioned low-carbon treatment equipment for high-ammonia nitrogen organic wastewater. The combination of its technical effects and features will not be elaborated further here. The above embodiments merely illustrate several implementation methods of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A low-carbon treatment device for high-ammonia-nitrogen organic wastewater, characterized in that, Comprise: A pretreatment module, an aerobic module, a denitrification and phosphorus removal module, a strengthened denitrification module, a sedimentation effluent module, a carbon source supply module, and a control module; The pretreatment module is used for physically intercepting and precipitating wastewater to obtain pretreated wastewater; The aerobic module is used for providing an aerobic environment and consuming organic matter in the pretreated wastewater to obtain aerobic consumption wastewater; The denitrification and phosphorus removal module and the strengthened denitrification module constitute a cascaded secondary denitrification and phosphorus removal, and are used for performing cascaded secondary denitrification and phosphorus removal on the aerobic consumption wastewater; the denitrification and phosphorus removal module and the strengthened denitrification module are the same in that both include an outer cylinder, an inner cylinder, a flow guide device, and an aeration device; the inner cylinder is in communication with the outer cylinder and is divided into an inner reaction cavity located inside the inner cylinder and an outer reaction cavity located between the inner cylinder and the outer cylinder; the flow guide device is connected to the axial bottom end of the inner cylinder; the aeration device is arranged in the flow guide device; the difference between the denitrification and phosphorus removal module and the strengthened denitrification module is that the denitrification and phosphorus removal module adopts a multi-stage vertical flow guide device and is provided with a crushing device below; The strengthened denitrification module adopts a single-stage vertical flow guide device and is not provided with a crushing device below; The sedimentation effluent module is used for performing sedimentation on the wastewater after secondary denitrification and phosphorus removal and discharging sludge effluent; The carbon source supply module is used for supplying carbon sources in a targeted manner during denitrification and phosphorus removal; The carbon source supply module comprises a first branch and a second branch, an inlet of which is in communication with the pretreatment module, and outlets of which are in communication with the denitrification and phosphorus removal module and the strengthened denitrification module, respectively; The control module is used for controlling the secondary denitrification and phosphorus removal process and the carbon source supply process according to reaction indexes in the denitrification and phosphorus removal module and the strengthened denitrification module; the control module comprises ammonia nitrogen concentration detection components and nitrate nitrogen concentration detection components arranged in the denitrification and phosphorus removal module and the strengthened denitrification module; when the ammonia nitrogen concentration in the denitrification and phosphorus removal module is less than a set threshold value or the nitrate nitrogen concentration is higher than a set threshold value, the wastewater in the denitrification and phosphorus removal module is introduced into the strengthened denitrification module; The control module is also used for introducing an overshoot carbon source from the pretreatment module when the nitrate nitrogen concentration in the denitrification and phosphorus removal module and the strengthened denitrification module exceeds a nitrate nitrogen threshold value.

2. The low carbon treatment equipment for high-ammonia-nitrogen organic wastewater according to claim 1, characterized in that, The control module further comprises nitrite nitrogen concentration detection components arranged in the denitrification and phosphorus removal module and the strengthened denitrification module; The denitrification and phosphorus removal module adopts continuous aeration, and the aeration amount in the denitrification and phosphorus removal module is inversely proportional to the nitrite nitrogen concentration in the denitrification and phosphorus removal module; The strengthened denitrification module adopts interval aeration, and the aeration amount in the strengthened denitrification module is directly proportional to the ratio of ammonia nitrogen to nitrite nitrogen in the strengthened denitrification module; and the aeration is stopped when the ratio of ammonia nitrogen to nitrite nitrogen is less than a ratio threshold value.

3. The low carbon treatment equipment for high-ammonia-nitrogen organic wastewater according to claim 1, characterized in that, The denitrification and phosphorus removal module and the strengthened denitrification module adopt a complete multi-stage vertical flow guide device, which comprises a hollow connection unit and a flow guide unit; The connection unit comprises a plurality of sections with different diameters; an upper section is used for connecting the inner cylinder of the sewage treatment equipment; and a lower section is used for connecting the upper end of the flow guide unit; The flow guide unit comprises an inner inclined flow guide part and an outer inclined flow guide part; a plurality of multi-stage screen holes with gradually increasing sizes are arranged on the inclined surface of the inner inclined flow guide part as the height decreases; Through holes are arranged in the inner inclined flow guide part and the outer inclined flow guide part; The diameter of the through holes is greater than that of the screen holes.

4. The low carbon treatment equipment for high-ammonia-nitrogen organic wastewater in claim 2, characterized in that, The carbon source supply module further comprises: A third branch, an inlet of which is in communication with the effluent outlet of the sedimentation effluent module, and an outlet of which is in communication with the denitrification and phosphorus removal module; The control module is further configured to introduce the reflux carbon source from the sedimentation effluent module when the ammonia nitrogen concentration in the denitrification and phosphorus removal module is higher than the ammonia nitrogen threshold.

5. The low carbon treatment equipment for high-ammonia-nitrogen organic wastewater according to any one of claims 1 to 4, characterized in that, The pretreatment module comprises a filter assembly, a first effluent outlet, a first aeration assembly, and a carbon source supply port. The filter assembly is arranged at the water inlet of the pretreatment module. The first effluent outlet is arranged at a lower position of the pretreatment module and is in communication with the aerobic module to overflow into the aerobic module. The first aeration assembly is arranged at the bottom of the pretreatment module and aeration is upward. The carbon source supply port is arranged at the upper part of the pretreatment module and is in communication with the denitrification and phosphorus removal module and the enhanced denitrification module.

6. The low carbon treatment equipment for high-ammonia-nitrogen organic wastewater in claim 5, characterized in that, The aerobic module comprises an aerobic reaction cavity, a partition plate, a second aeration assembly, a biological filler zone, and a second overflow outlet. The partition plate is arranged at one side of the first overflow outlet and extends from the top of the aerobic reaction cavity to the bottom of the aerobic reaction cavity. The second aeration assembly is arranged at the bottom of the aerobic reaction cavity and aeration is upward. The biological filler zone is arranged between the partition plate and the aerobic reaction cavity and is above the second aeration assembly. The second overflow outlet is arranged above the biological filler zone.

7. A low-carbon treatment process for high-ammonia-nitrogen organic wastewater, using the low-carbon treatment equipment for high-ammonia-nitrogen organic wastewater according to any one of claims 1 to 6, characterized in that the steps of The method comprises the following steps: S1: wastewater is first pretreated in the pretreatment module, and part of the wastewater is introduced into the denitrification and phosphorus removal module and the enhanced denitrification module to supplement carbon source in stages; S2: the pretreated wastewater is introduced into the aerobic module to further consume organic matter through aerobic reaction to obtain aerobic consumption wastewater; S3: the aerobic consumption wastewater is introduced into the denitrification and phosphorus removal module and the enhanced denitrification module in sequence, and autotrophic denitrification and simultaneous phosphorus removal treatment is performed by using functional microorganisms; S4: the wastewater treated by autotrophic denitrification and simultaneous phosphorus removal is introduced into a sedimentation unit for sedimentation, and it is determined whether the effluent meets the discharge or reuse standard; if the pollutant concentration does not meet the discharge or reuse standard, the part of the effluent is introduced into the denitrification and phosphorus removal module for recycling treatment; if the sedimentation effluent has met the discharge or reuse standard, part of the sedimentation effluent is refluxed to the denitrification and phosphorus removal module, and the remaining part is discharged as the effluent meeting the standard.

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