High-efficiency treatment equipment for leachate of garbage compression transfer station

Abstract

The application discloses a leachate treatment equipment for garbage compression transfer stations, which comprises a pretreatment unit (a basket filter with a pore diameter of less than or equal to 5 mm), a hydrolysis acidification unit, a biological treatment unit, a sedimentation tank, a coagulation tank, a clean water tank and a sludge treatment unit connected with the sedimentation tank and the hydrolysis acidification unit in sequence through a pump pipe, and the input end of the pretreatment unit is connected with a leachate collection pipe network; the non-membrane main process is adopted, the pollutant removal is realized in stages, the daily treatment capacity of 2T / 5T is adapted, the effluent meets the requirements of DB51 / 190 level 3 and GB31962B level B, the reuse or pipe connection requirements are met, the secondary pollution is avoided, and the site and operation and maintenance requirements of township stations are adapted.

Description

Technical Field

[0001] This utility model relates to the technical field of landfill leachate treatment equipment, specifically to a high-efficiency leachate treatment equipment for landfill compression transfer stations. Background Technology

[0002] With the improvement of the rural domestic waste collection and transportation system, waste transfer stations have become a key node in county-level waste treatment. However, the leachate they produce is complex in composition and has high pollutant concentrations (such as chemical oxygen demand (CODcr) up to 12,000 mg / L, biochemical oxygen demand (BOD5) up to 9,000 mg / L, total phosphorus (TP) up to 150 mg / L, and a pH value of acidic 5-6). Furthermore, it is significantly affected by climate and seasonal changes, resulting in significant fluctuations in water quality and quantity, making it a challenge for rural environmental governance. Taking the 11 rural waste transfer stations under the jurisdiction of Guanghan City as an example, different stations require treatment equipment with a daily processing capacity of 5T or 2T. Some transfer stations, although already having pipelines, have not yet been connected to the mains, requiring simultaneous on-site upgrades and renovations. At the same time, the compactness of equipment layout (limited land area for rural stations), operational economy, and the absence of secondary pollution requirements must be considered.

[0003] Current leachate treatment technologies on the market suffer from several compatibility issues: First, most equipment uses membrane treatment processes, which, while achieving a certain level of water purification, suffer from high operating and maintenance costs and a high risk of secondary pollution of the concentrate, contradicting the "low cost, low pollution" requirements of township projects; Second, some treatment systems do not adequately consider fluctuations in water quality and quantity, easily resulting in substandard effluent quality at maximum flow and load, and unstable operation at minimum flow and load, making it difficult to serve township sites long-term; Third, automation is low, lacking real-time data monitoring, acquisition, and control functions, requiring frequent manual operation, which is not ideal. In addition to the high labor intensity and heavy management workload, the treatment effect is also easily affected by human error. Fourth, the sludge disposal process is imperfect. Some equipment is not equipped with a reliable sludge compression and dewatering system, or the dewatered sludge cannot meet the "Leaching Toxicity Identification Standard Values ​​According to GB5085.3-2007", which poses a risk of secondary pollution. Fifth, the equipment layout design lacks flexibility and is difficult to adapt to the existing site conditions of different township transfer stations (such as some stations with an area of ​​only 1,337 square meters), which can easily lead to wasted space or increased investment. Moreover, the corrosion resistance of some core components of the equipment is insufficient, and the service life is difficult to guarantee, which cannot meet the needs of long-term stable operation of township projects. Summary of the Invention

[0004] This utility model aims to solve one of the technical problems existing in the prior art.

[0005] This application provides a high-efficiency leachate treatment device for waste compression transfer stations, including a pretreatment unit, a hydrolysis acidification unit, a biological treatment unit, a sedimentation tank, a coagulation tank, and a clear water tank, all connected in sequence via pumped pipelines, and a sludge treatment unit connected to the sedimentation tank and the hydrolysis acidification unit. The input end of the pretreatment module is used to connect to the external leachate collection network of the waste transfer station.

[0006] The pretreatment unit is a basket filter with a pore size of no more than 5 mm.

[0007] The hydrolysis acidification unit includes a hydrolysis acidification tank, a branch-type water distributor, a sewage pump, and a temperature control module. The sewage pump is used to send the leachate treated by the pretreatment unit into the branch-type water distributor. The branch-type water distributor is located at the bottom of the hydrolysis acidification tank to achieve uniform water distribution. The temperature control module is used to maintain a constant temperature inside the hydrolysis acidification tank.

[0008] The hydrolysis acidification unit also includes an overflow tank, which is located at the top of the inner cavity of the hydrolysis acidification tank, and the overflow tank is connected to the biological treatment unit through a pipeline with a pump.

[0009] The system includes an anoxic tank, four micro-aerobic tanks connected in series, and an aeration unit for aerating the micro-aerobic tanks.

[0010] The aeration unit includes an aeration blower and several aeration heads, each of which is located at the bottom of the micro-aerobic tank and connected to the aeration blower.

[0011] The sludge treatment unit includes a sludge tank, a sludge pump, and a filter press. The inlet of the sludge pump is connected to the biological treatment unit and the hydrolysis acidification unit via pipelines, respectively. The outlet of the sludge pump is connected to the sludge tank, and the sludge tank is connected to the filter press.

[0012] A guide pipe is fixed inside the sedimentation tank, and the top of the guide pipe is connected to a pumped pipeline output from the biological treatment unit.

[0013] The bottom of the guide tube is tapered, with a smaller top and a larger bottom, and the bottom of the guide tube is an open structure.

[0014] The coagulation tank is also connected to a coagulant storage tank via a metering pump.

[0015] The beneficial effects of this utility model are as follows:

[0016] Avoiding the drawbacks of membrane treatment and reducing operation and maintenance costs and pollution risks: This leachate treatment equipment adopts a non-membrane main process of "hydrolysis acidification + micro-aeration simultaneous denitrification and carbon removal + oxidation flocculation", which fully meets the requirements of "avoiding high operation and maintenance costs and secondary pollution of concentrate" in the procurement needs. The operating cost can be controlled at ≤35 yuan / t-wastewater, and no concentrate is generated. It fundamentally solves the core pain points of traditional membrane treatment processes and is suitable for the economic and environmental protection needs of township projects.

[0017] Adaptable to fluctuations in water quality and quantity, ensuring long-term stable operation: The equipment fully considers the impact of climate and season on water quality and quantity. It achieves influent homogenization through the "micro-aeration process circulation homogenization and storage system". With the four-stage micro-aeration tank series design and temperature control module (the temperature of the hydrolysis acidification unit is stable at 25-30℃), the hydraulic retention time can be optimized (the hydrolysis acidification unit ≤4d) to ensure that the effluent water quality meets the standards (5T equipment meets GB31962B level, and 2T equipment meets DB51 / 190 level 3) at the maximum water volume and highest load. At the minimum water volume and lowest load, the operating parameters are dynamically adjusted through the PLC control system to ensure the safety and stability of the equipment and meet the long-term service needs of township stations.

[0018] High level of automation, reducing labor and management costs: The equipment is equipped with an intelligent control system that integrates PLC modules, online pH monitoring, flow monitoring feedback, and real-time data acquisition and transmission functions. It can realize automatic leachate metering, real-time monitoring and storage of key parameters of the treatment process (such as temperature of each unit, working status of aeration blowers, and influent flow rate), and supports both PLC microcomputer automatic control and manual control modes. This greatly reduces the intensity of manual operation and management workload, eliminating the need for frequent on-site supervision by professional personnel. It perfectly meets the "simple operation and high efficiency" operation and maintenance needs of township sites.

[0019] Safe sludge disposal, preventing secondary pollution: The equipment integrates a sludge dewatering module (including a sludge pump, screw press, and dosing device), which can compress and dewater the residual sludge generated by the hydrolysis acidification unit and the biological treatment unit. The sludge test results after dewatering meet the "Leaching Toxicity Identification Standard Values ​​According to GB5085.3-2007", with no risk of secondary pollution. At the same time, the sludge disposal process is coordinated with the main leachate treatment process to form an integrated "sewage-sludge" treatment closed loop, which meets the environmental protection requirements of township projects.

[0020] Compact layout and strong corrosion resistance, suitable for rural sites and long-term use: During the bidding stage, on-site surveys of each site were conducted, and the equipment layout design was carried out in combination with the existing site conditions, such as the minimum site area of ​​1337 square meters. The 2T equipment occupies an area of ​​<17m², and the 5T equipment occupies an area of ​​<40m², maximizing space utilization and reducing project investment. At the same time, the main unit of the equipment and the core contact parts are made of corrosion-resistant materials (such as 304 stainless steel and anti-corrosion coating), with a service life of ≥90,000 hours, no risk of leakage, and a smooth surface without sharp edges, which is suitable for the site restrictions and long-term operation requirements of rural sites.

[0021] Integrated delivery and comprehensive after-sales service ensure efficient project implementation: Equipment delivery, installation, commissioning, and pipeline upgrades (for sites not yet connected to the pipeline) can be completed within 30 days of contract signing, with a one-year warranty period (starting from acceptance). During the warranty period, free repair, parts replacement, and training services (including equipment structure, operation and maintenance, troubleshooting, etc.) are provided to ensure that rural users can quickly master operation and maintenance skills, guaranteeing efficient project implementation and long-term stable operation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a high-efficiency leachate treatment device for waste compression transfer stations, as described in this application embodiment.

[0023] Figure Labels

[0024] 1-Pretreatment unit, 2-Hydrolysis acidification unit, 21-Hydrolysis acidification tank, 22-Branch water distributor, 23-Sewage pump, 24-Temperature control module, 25-Overflow trough, 3-Biological treatment unit, 31-Anoxic tank, 32-Microaerobic tank, 33-Aeration unit, 331-Aeration blower, 332-Aeration head, 4-Sedimentation tank, 41-Guide pipe, 5-Coagulation tank, 51-Metering pump, 52-Coagulant storage tank, 6-Clear water tank, 7-Sludge treatment unit, 71-Sludge tank, 72-Sludge pump, 73-Filter press. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0026] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0027] The efficient leachate treatment equipment for waste compression transfer stations provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0028] Example 1:

[0029] This application provides an efficient leachate treatment device for waste compression transfer stations, comprising a pretreatment unit 1, a hydrolysis acidification unit 2, a biological treatment unit 3, a sedimentation tank 4, a coagulation tank 5, and a clear water tank 6, all connected sequentially via pumped pipelines, and a sludge treatment unit 7 connected to the sedimentation tank 4 and the hydrolysis acidification unit 2. The input end of the pretreatment module is used to connect to the external leachate collection network of the waste transfer station.

[0030] In this embodiment of the application, the pretreatment unit 1 is a basket filter with a pore size of no more than 5 mm.

[0031] like Figure 1 As shown, due to the above structure, the technical principle is as follows: based on the segmented treatment logic of "pretreatment-biochemical treatment-deep treatment-sludge disposal", firstly, a basket filter is used to remove large-particle suspended solids (SS) and impurities from the leachate, avoiding pipe blockage or equipment wear in subsequent treatment units (such as hydrolysis acidification tank 21 and micro-aerobic tank 32); then, the hydrolysis acidification unit 2 decomposes large-molecule organic matter (such as high-concentration CODcr and BOD5) into small-molecule easily degradable substances, reducing the burden on the subsequent biological treatment unit 3; the biological treatment unit 3 uses microorganisms to achieve denitrification and carbon removal, the sedimentation tank 4 and coagulation tank 5 further remove suspended solids, phosphorus and residual COD, and the clear water tank 6 temporarily stores qualified water to meet reuse or discharge requirements; the sludge treatment unit 7 collects the sludge generated in each stage to avoid secondary pollution, and finally forms a closed-loop treatment system of "graded removal of pollutants and separate disposal of sludge".

[0032] Operating Logic: Leachate from the external waste transfer station first enters the pretreatment unit 1 through the collection pipeline network. After being filtered by a basket filter to remove impurities with a particle size >5mm, it is transported to the hydrolysis acidification unit 2 by a pumped pipeline. After hydrolysis acidification, the leachate sequentially enters the biological treatment unit 3, sedimentation tank 4, and coagulation tank 5 to gradually reduce the concentration of pollutants such as COD, BOD, ammonia nitrogen, and TP. The treated water that meets the standards enters the clear water tank 6 and is used for in-station reuse or direct discharge (2T equipment) / connected to the municipal sewer system (5T equipment) as needed. The sludge generated by sedimentation tank 4 and hydrolysis acidification unit 2 is transported to the sludge treatment unit 7 through pipelines, thus realizing the full-process treatment of leachate. All units are connected by pumped pipelines to ensure stable and controllable water flow, meeting the requirements of "high degree of automation and simple operation".

[0033] Example 2:

[0034] In this embodiment, in addition to the structural features of the aforementioned embodiments, the hydrolysis acidification unit 2 includes a hydrolysis acidification tank 21, a branch-type water distributor 22, a sewage pump 23, and a temperature control module 24. The sewage pump 23 is used to send the leachate treated by the pretreatment unit 1 into the branch-type water distributor 22. The branch-type water distributor 22 is located at the bottom of the hydrolysis acidification tank 21 to achieve uniform water distribution. The temperature control module 24 is used to maintain a constant temperature inside the hydrolysis acidification tank 21.

[0035] In this embodiment of the application, the hydrolysis acidification unit 2 further includes an overflow tank 25, which is disposed at the top of the inner cavity of the hydrolysis acidification tank 21, and the overflow tank 25 is connected to the biological treatment unit 3 through a pump-equipped pipeline.

[0036] like Figure 1 As shown, due to the aforementioned structure, the technical principle is as follows: The core of the hydrolysis acidification unit 2 is to decompose organic matter using the metabolic action of anaerobic microorganisms. The structural design of "branched water distributor 22 + temperature control module 24 + overflow tank 25" is to optimize the microbial living environment and water flow distribution. Specifically, the branched water distributor 22 can evenly distribute the pretreated leachate to the bottom of the hydrolysis acidification tank 21, avoiding "dead zones" caused by localized water flow concentration and ensuring sufficient contact between wastewater and microorganisms. The temperature control module 24 stabilizes the temperature inside the tank at 25-30℃, which is the optimal activity temperature for hydrolysis acidification microorganisms, ensuring a treatment efficiency of ≤4 days of hydraulic retention time and effectively reducing the organic load on the subsequent biological treatment unit 3. The overflow tank 25 is located at the top of the tank's internal cavity, achieving "full flow discharge" through liquid level difference, avoiding excessive water accumulation and resulting in excessive pressure, while precisely controlling the wastewater's residence time within the tank to ensure sufficient decomposition of organic matter.

[0037] Operating Logic: The leachate treated by the pretreatment unit 1 is pumped by the sewage pump 23 to the branch-type water distributor 22. The water distributor evenly sprays the sewage onto the bottom of the hydrolysis acidification tank 21. The sewage rises slowly in the tank (rising flow rate 1.0-1.5m / s) and comes into contact with microorganisms. Under the environment of 25-30℃ maintained by the temperature control module 24, after a hydraulic retention time of ≤4 days, large molecular organic matter (such as cellulose and protein) is decomposed into small molecular organic acids, alcohols, etc. When the liquid level in the tank rises to the height of the overflow tank 25, the treated sewage automatically flows into the biological treatment unit 3 through the overflow tank 25 and the pumped pipeline. No additional power is required to control the liquid level, which not only ensures the treatment effect, but also meets the requirements of "reducing labor intensity and improving operation and control efficiency".

[0038] Example 3:

[0039] In this embodiment, in addition to the structural features of the aforementioned embodiments, the biological treatment unit 3 includes an anoxic tank 31, a four-stage micro-aerobic tank 32 arranged in series, and an aeration unit 33 for aerating the micro-aerobic tank 32.

[0040] In this embodiment of the application, the aeration unit 33 includes an aeration blower 331 and a plurality of aeration heads 332, each of the aeration heads 332 being disposed at the bottom of each micro-aerobic tank 32 and connected to the aeration blower 331.

[0041] like Figure 1 As shown, due to the above structure, the technical principle is as follows: Based on the denitrification mechanism of "anoxic denitrification + microaerobic simultaneous nitrification and denitrification", the anoxic tank 31 provides an anaerobic environment for denitrifying bacteria, which can reduce the nitrate nitrogen produced in the subsequent microaerobic tank 32 to nitrogen gas, thereby achieving total nitrogen removal; the four-stage series microaerobic tank 32 controls the dissolved oxygen concentration (microaerobic environment, non-aerobic / anaerobic) to allow nitrifying bacteria (converting ammonia nitrogen to nitrate nitrogen) and denitrifying bacteria (converting nitrate nitrogen to nitrogen gas) to coexist, while decomposing COD, achieving the effect of "simultaneous denitrification and carbon removal"; the bottom aeration head 332 (connected to the aeration blower 331) can evenly disperse air to the bottom of the microaerobic tank 32 to avoid local dissolved oxygen being too high or too low, and together with the CC-LT-10A high-efficiency denitrification packing, it provides an attachment carrier for microorganisms, improving the concentration of microorganisms and treatment efficiency; the four-stage series design can cope with the fluctuation of leachate water quality and quantity, and ensure the stability of the final treatment effect by gradually degrading pollutants.

[0042] Operating Logic: The leachate after hydrolysis and acidification first enters the anoxic tank 31. In an anaerobic environment, denitrifying bacteria use the organic matter in the wastewater as a carbon source to reduce the nitrate nitrogen returned from the subsequent microaerobic tank 32 to nitrogen gas. Then, the wastewater enters the four-stage microaerobic tank 32. The aeration blower 331 introduces air into the tank through the bottom aeration head 332 to control the dissolved oxygen to be maintained in the microaerobic range. The microorganisms attached to the high-efficiency denitrification packing material simultaneously carry out nitrification (ammonia nitrogen → nitrate nitrogen), denitrification (nitrate nitrogen → nitrogen gas), and COD degradation. The four-stage microaerobic tanks 32 are connected in series, and the wastewater is treated step by step, and the pollutant concentration gradually decreases, finally meeting the effluent requirements of "total nitrogen ≤70mg / L and ammonia nitrogen ≤45mg / L for 5T equipment; ammonia nitrogen ≤25mg / L for 2T equipment". At the same time, the working status of the aeration blower 331 can be monitored in real time through the monitoring system.

[0043] Example 4:

[0044] In this embodiment, in addition to the structural features of the aforementioned embodiments, the sludge treatment unit 7 includes a sludge tank 71, a sludge pump 72, and a filter press 73. The inlet of the sludge pump 72 is connected to the biological treatment unit 3 and the hydrolysis acidification unit 2 through pipes, respectively. The outlet of the sludge pump 72 is connected to the sludge tank 71, and the sludge tank 71 is connected to the filter press 73.

[0045] like Figure 1 As shown, due to the aforementioned structure, the technical principle is as follows: During the leachate treatment process, the hydrolysis acidification unit 2 will generate anaerobic sludge, and the biological treatment unit 3 (micro-aerobic tank 32) will generate excess activated sludge. Direct discharge could easily cause secondary pollution. Therefore, a process of "sludge tank 71 for temporary storage - filter press 73 for dewatering" is required to reduce sludge volume and ensure safe disposal. The sludge pump 72 transports the sludge from both locations to the sludge tank 71, preventing sludge from accumulating in the original treatment unit and affecting treatment efficiency. The filter press 73 reduces the sludge moisture content through mechanical pressure, reducing sludge volume and facilitating off-site disposal. Simultaneously, the dewatered sludge must meet the "Leaching Toxicity Identification Standard Values ​​According to GB5085.3-2007" to ensure that there is no risk of leaching heavy metals or other toxic substances, thus meeting the environmental protection requirement of "no secondary pollution risk."

[0046] Operating Logic: The anaerobic sludge from hydrolysis acidification unit 2 and the excess sludge from biological treatment unit 3 enter the inlet of sludge pump 72 through their respective pipelines. The sludge is then pressurized and transported by sludge pump 72 to sludge tank 71 for temporary storage (to prevent sludge from clogging the original unit pipelines). After homogenization, the sludge in sludge tank 71 is transported to filter press 73 for compression and dewatering. The dewatered sludge cake is transported off-site by a professional unit for disposal. The filtrate generated during the filtration process (containing a small amount of pollutants) can be returned to pretreatment unit 1 for reprocessing, forming a "zero-discharge" closed loop for sludge disposal, which avoids secondary pollution and meets the requirements of "economical operation and safe and reliable operation".

[0047] Example 5:

[0048] In this embodiment, in addition to the structural features of the aforementioned embodiments, a guide pipe 41 is fixedly installed inside the sedimentation tank 4, and the top of the guide pipe 41 is connected to the pumped pipeline output by the biological treatment unit 3.

[0049] In this embodiment of the application, the bottom of the guide tube 41 is tapered with a smaller upper end and a larger lower end, and the bottom of the guide tube 41 is an open structure.

[0050] like Figure 1 As shown, due to the aforementioned structure, the technical principle is as follows: The core function of sedimentation tank 4 is to achieve solid-liquid separation of the mixed liquor after biological treatment. The design of the guide pipe 41 (connected to the biological treatment output at the top and open in a conical shape at the bottom) optimizes the water flow state and avoids "short-circuiting" or "disturbance" affecting the separation effect. The mixed liquor after biological treatment (including activated sludge and supernatant) enters the top of guide pipe 41 through a pumped pipeline. When flowing downwards along guide pipe 41, the "small at the top and large at the bottom" structure of the conical bottom slows down the water flow velocity, allowing the mixed liquor to slowly diffuse into sedimentation tank 4. This avoids high-speed water flow impacting the sludge that has already settled at the bottom of the tank, ensuring that the sludge settles stably under gravity. At the same time, the closed structure of guide pipe 41 prevents the mixed liquor from overflowing directly at the top, ensuring that all mixed liquor undergoes the "guide-diffusion-sedimentation" process, improving solid-liquid separation efficiency, reducing the suspended solids content in the supernatant, and reducing the burden on the subsequent coagulation tank 5.

[0051] Operating Logic: The mixed liquor from biological treatment unit 3 (four-stage micro-aerobic tank 32) is transported to the top of guide pipe 41 through a pumped pipeline, flows downward along the inner wall of guide pipe 41, and slowly overflows from the open conical bottom into sedimentation tank 4; the activated sludge in the mixed liquor gradually settles to the bottom of the tank under gravity, forming a sludge layer; the supernatant (containing a small amount of suspended solids, residual COD and phosphorus) flows out through the overflow port at the top of sedimentation tank 4 and enters coagulation tank 5 for further treatment; the sludge settled at the bottom of the tank is periodically discharged to sludge treatment unit 7 (sludge tank 71) through a pipeline to avoid sludge accumulation in sedimentation tank 4, which would reduce the effective volume and ensure stable solid-liquid separation effect, meeting the pre-effect requirements of "suspended solids ≤150mg / L for 2T equipment and ≤400mg / L for 5T equipment".

[0052] Example 6:

[0053] In this embodiment, in addition to the structural features of the aforementioned embodiments, the coagulation tank 5 is also connected to a coagulant storage tank 52 via a metering pump 51.

[0054] like Figure 1As shown, due to the aforementioned structure, the technical principle is as follows: The core function of the coagulation tank 5 is to remove residual suspended solids, total phosphorus (TP), and some COD from the supernatant of the sedimentation tank 4. The cooperation between the metering pump 51 and the coagulant storage tank 52 is key to achieving "precise dosing and efficient treatment." The metering pump 51 can automatically adjust the amount of coagulant added according to the influent flow rate and water quality (such as TP concentration and COD concentration) of the coagulation tank 5, avoiding "excessive waste" or "insufficient dosing leading to substandard treatment" caused by manual dosing. The coagulant (green and environmentally friendly, with no secondary pollution) reacts with colloidal particles and phosphate ions in the wastewater, forming larger flocs through "adsorption-bridging-sweeping" action, which facilitates subsequent solid-liquid separation (such as in the sedimentation tank 4), ultimately achieving deep removal of TP, COD, and suspended solids, ensuring that the effluent meets reuse or discharge standards.

[0055] Operating Logic: After the supernatant from sedimentation tank 4 enters coagulation tank 5, the online monitoring module (such as TP sensor and COD sensor) collects water quality data in real time and transmits the signal to the control system. Based on the water quality data and influent flow rate, the control system instructs metering pump 51 to extract coagulant from coagulant storage tank 52 and accurately add it into coagulation tank 5 according to the requirement of "steady-state accuracy ±2%". The coagulant and sewage are fully mixed in the tank by the stirring device, and flocculation reaction occurs to form flocs. The sewage containing flocs then enters the subsequent treatment unit (such as the deep treatment system or secondary sedimentation tank 4), where the flocs settle and separate under gravity, and the supernatant is the qualified water (2T equipment meets DB51 / 190 Class III, and 5T equipment meets GB31962 Class B). The entire dosing process does not require manual intervention, which meets the requirements of "high degree of automation and economical operation", while the green and environmentally friendly agents avoid the risk of secondary pollution.

[0056] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0057] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A high-efficiency leachate treatment device for waste compression transfer stations, characterized in that, It includes a pretreatment unit, a hydrolysis acidification unit, a biological treatment unit, a sedimentation tank, a coagulation tank, and a clear water tank, all connected in sequence via pumped pipelines, as well as a sludge treatment unit connected to the sedimentation tank and the hydrolysis acidification unit. The input end of the pretreatment unit is used to connect to the leachate collection pipeline network of an external waste transfer station.

2. The high-efficiency leachate treatment equipment for waste compression transfer stations according to claim 1, characterized in that, The pretreatment unit is a basket filter with a pore size of no more than 5 mm.

3. The high-efficiency leachate treatment equipment for waste compression transfer stations according to claim 1, characterized in that, The hydrolysis acidification unit includes a hydrolysis acidification tank, a branch-type water distributor, a sewage pump, and a temperature control module. The sewage pump is used to send the leachate treated by the pretreatment unit into the branch-type water distributor. The branch-type water distributor is located at the bottom of the hydrolysis acidification tank to achieve uniform water distribution. The temperature control module is used to maintain a constant temperature inside the hydrolysis acidification tank.

4. The high-efficiency leachate treatment equipment for waste compression transfer stations according to claim 3, characterized in that, The hydrolysis acidification unit also includes an overflow tank, which is located at the top of the inner cavity of the hydrolysis acidification tank, and the overflow tank is connected to the biological treatment unit through a pipeline with a pump.

5. The high-efficiency leachate treatment equipment for waste compression transfer stations according to claim 1, characterized in that, The system includes an anoxic tank, four micro-aerobic tanks connected in series, and an aeration unit for aerating the micro-aerobic tanks.

6. The high-efficiency leachate treatment equipment for waste compression transfer stations according to claim 5, characterized in that, The aeration unit includes an aeration blower and several aeration heads, each of which is located at the bottom of the micro-aerobic tank and connected to the aeration blower.

7. The high-efficiency leachate treatment equipment for waste compression transfer stations according to claim 1, characterized in that, The sludge treatment unit includes a sludge tank, a sludge pump, and a filter press. The inlet of the sludge pump is connected to the biological treatment unit and the hydrolysis acidification unit via pipelines, respectively. The outlet of the sludge pump is connected to the sludge tank, and the sludge tank is connected to the filter press.

8. The high-efficiency leachate treatment equipment for waste compression transfer stations according to claim 1, characterized in that, A guide pipe is fixed inside the sedimentation tank, and the top of the guide pipe is connected to a pumped pipeline output from the biological treatment unit.

9. The high-efficiency leachate treatment equipment for waste compression transfer stations according to claim 8, characterized in that, The bottom of the guide tube is tapered, with a smaller top and a larger bottom, and the bottom of the guide tube is an open structure.

10. The high-efficiency leachate treatment equipment for waste compression transfer stations according to claim 1, characterized in that, The coagulation tank is also connected to a coagulant storage tank via a metering pump.

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