Integrated treatment equipment for landfill leachate

Abstract

The utility model discloses a kind of garbage leachate integrated treatment equipment, to provide a kind of garbage leachate integrated treatment equipment with simple structure, can sewage is separated by solid-liquid, biological decomposition treatment, multistage oxygen treatment, osmotic membrane treatment and disinfection and oxidation whole-process processing.The utility model includes cabinet, oil separation material chemical reaction module, biological bacteria degradation oxidation reaction module, multistage oxygen reaction module, MBR advanced treatment module and effluent disinfection module, solid-liquid mixture is matched with the standard effluent pipe of the one side of the cabinet by the oil separation material chemical reaction module, the biological bacteria degradation oxidation reaction module, the multistage oxygen reaction module, the MBR advanced treatment module and the effluent disinfection module.The utility model is applied to the technical field of sewage treatment.

Description

Technical Field

[0001] This utility model applies to the technical field of wastewater treatment, and particularly relates to an integrated treatment device for landfill leachate. Background Technology

[0002] Industrial production and daily life generate large amounts of industrial or domestic wastewater. This wastewater needs to be transported to treatment plants for solid-liquid separation and disinfection. Current treatment methods, such as high-efficiency oil-water separation physicochemical reactions, biological degradation and oxidation reactions, anaerobic / anoxic reactions, microaerobic reactions, aerobic reactions, MBR advanced treatment, and final disinfection and oxidation of the treated water, require large-scale equipment for each process. After treatment, the wastewater is transferred to the next treatment plant via transfer equipment or pipelines. This method requires significant space to accommodate multiple large-scale treatment units, and the efficiency of inter-equipment transfer is low, easily affecting the wastewater purification effect. If a simple, integrated landfill leachate treatment system could be designed to perform solid-liquid separation, biological decomposition, multi-stage oxygen treatment, membrane permeation treatment, and disinfection and oxidation throughout the entire process, these problems could be solved. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an integrated landfill leachate treatment equipment with a simple structure that can carry out solid-liquid separation, biological decomposition, multi-stage oxygen treatment, permeation membrane treatment, disinfection and oxidation of wastewater.

[0004] The technical solution adopted by this utility model is as follows: This utility model includes a cabinet, an oil-water separation physicochemical reaction module, a biological bacteria degradation and oxidation reaction module, a multi-stage oxygen reaction module, an MBR deep treatment module, and an effluent disinfection module. The solid-liquid mixture is connected to the qualified effluent pipe on one side of the cabinet through the oil-water separation physicochemical reaction module, the biological bacteria degradation and oxidation reaction module, the multi-stage oxygen reaction module, the MBR deep treatment module, and the effluent disinfection module.

[0005] Furthermore, the oil-water separation physicochemical reaction module includes a rotary mixing tank, a waste tank, and a wastewater tank, wherein the wastewater tank and the waste tank are respectively connected to the water outlet and the material outlet of the rotary mixing tank.

[0006] Furthermore, the biological degradation and oxidation reaction module includes a compound bacterial agent treatment module and a transfer box. The compound bacterial agent treatment module is connected to the outlet of the sewage tank, and the transfer box is connected to the outlet of the compound bacterial agent treatment module.

[0007] Furthermore, the multi-stage oxygen reaction module includes an anaerobic reaction chamber, a denitrification reaction chamber, and an aerobic reaction chamber. The anaerobic reaction chamber is connected to the outlet of the transfer tank, the denitrification reaction chamber is connected to the outlet of the anaerobic reaction chamber, and the aerobic reaction chamber is connected to the outlet of the denitrification reaction chamber.

[0008] Furthermore, the MBR deep treatment module includes a permeate membrane reaction tank and a water storage tank. The permeate membrane reaction tank is connected to the outlet of the aerobic reaction tank, and the water storage tank is connected to the outlet of the permeate membrane reaction tank.

[0009] Furthermore, the water disinfection module includes a disinfection module and an oxidation module. The disinfection module is connected to the water outlet of the water storage tank, and the oxidation module is connected to the water outlet of the disinfection module. The disinfection module and the oxidation module work together with the clean water in the water storage tank, and the qualified water outlet pipe is connected to the water outlet of the oxidation module.

[0010] Furthermore, a water inlet pipe is provided on one side of the cabinet, and the water inlet pipe is connected to the water inlet end of the oil-water separation physicochemical reaction module.

[0011] Furthermore, a central control maintenance channel is provided on one side of the cabinet.

[0012] Furthermore, an inspection ladder is provided on one side of the cabinet.

[0013] The beneficial effects of this utility model are: by integrating multiple processing modules into one cabinet and connecting them through pipes, this application can realize the whole process of solid-liquid separation, biological decomposition treatment, multi-stage oxygen treatment, permeation membrane treatment, disinfection and oxidation in one integrated manner. The overall structure is compact and occupies a small area, making it suitable for waste treatment stations of different sizes. By simultaneously generating clean water to meet the usage requirements, the overall treatment effect is better. Attached Figure Description

[0014] Figure 1 This is a perspective view of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a cross-sectional view from another perspective of this utility model. Detailed Implementation

[0015] like Figures 1 to 3As shown, in this embodiment, the present invention includes a cabinet 1, an oil-water separation and physicochemical reaction module 2, a biological degradation and oxidation reaction module 3, a multi-stage oxygen reaction module 4, an MBR deep treatment module 5, and an effluent disinfection module 6. The solid-liquid mixture is connected to the compliant effluent pipe 7 on one side of the cabinet 1 via the oil-water separation and physicochemical reaction module 2, the biological degradation and oxidation reaction module 3, the multi-stage oxygen reaction module 4, the MBR deep treatment module 5, and the effluent disinfection module 6. Therefore, this application integrates multiple treatment modules into one cabinet and connects them through pipes, achieving a fully integrated process of solid-liquid separation, biological decomposition treatment, multi-stage oxygen treatment, membrane permeation treatment, disinfection, and oxidation. The overall structure is compact, occupies a small area, and is suitable for waste treatment plants of different sizes. By simultaneously generating clean water to meet usage requirements, the overall treatment effect is better.

[0016] like Figure 1 and Figure 2 As shown, in this embodiment, the oil-water separation physicochemical reaction module 2 includes a rotary mixing tank 21, a waste tank 22, and a wastewater tank 23. The wastewater tank 23 and the waste tank 22 are respectively connected to the water outlet and the material outlet of the rotary mixing tank 21. Therefore, considering the characteristics of leachate from waste transfer stations—"short residence time, high mixing, and rapidly changing composition"—the equipment is equipped with a targeted, high-efficiency demulsifying oxidant. Its molecules can accurately identify the emulsion micelles formed by oil and water molecules in the leachate, and by disrupting the charge balance on the surface of the micelles, it forcibly breaks the stable state of "miscibility" between oil and water. Under the action of the swirling stirring device inside the reaction tank, the agent and leachate are fully mixed, and the oil-water separation process can be completed in only 15-20 minutes, with an oil flotation rate of over 95%, and a separation efficiency 60% higher than traditional gravity separation equipment. Considering the intermittent and pulsed nature of leachate discharge from waste transfer stations, the equipment employs an intelligent variable frequency water pump that automatically adjusts the influent flow rate based on the water level in the collection tank, preventing incomplete treatment due to excessive instantaneous water volume. Furthermore, the equipment is equipped with a fully automatic oil and sludge discharge system: when the top oil layer thickness reaches a set value (50mm), the oil discharge valve automatically opens to discharge the oil into the waste oil collection tank; the bottom sediment is periodically discharged via a screw conveyor, eliminating the need for manual cleaning and reducing direct contact between maintenance personnel and pollutants.

[0017] like Figure 1 and Figure 2As shown, in this embodiment, the biological degradation and oxidation reaction module 3 includes a composite microbial agent treatment module 31 and a transfer box 32. The composite microbial agent treatment module 31 is connected to the outlet of the sewage tank 23, and the transfer box 32 is connected to the outlet of the composite microbial agent treatment module 31. Therefore, the composite microbial agent treatment module 31 is a highly efficient treatment device developed to address the problem of difficult degradation of landfill leachate. The device is equipped with a special composite microbial agent, which selects multiple microbial strains with complementary functions. Among them, oxidizing bacteria are responsible for initiating the chain-breaking decomposition of organic matter, converting large molecular pollutants into small molecular intermediates; fermenting bacteria then complete the subsequent degradation, ultimately converting it into harmless substances such as carbon dioxide and water. In terms of environmental adaptability, this microbial agent, through pretreatment and acclimatization technology, has acquired the characteristics of tolerating high COD, high ammonia nitrogen, and strong toxicity of leachate. After addition, it can quickly colonize within 24 hours, forming an absolutely dominant beneficial microbial community by seizing carbon sources, nitrogen sources, and other nutrients and living space. At the same time, beneficial bacteria secrete substances such as antimicrobial peptides, which inhibit the activity of harmful microorganisms such as acid-producing bacteria and sulfate-reducing bacteria at the metabolic level, preventing their metabolic products from interfering with the degradation process.

[0018] like Figure 1 and Figure 2As shown, in this embodiment, the multi-stage oxygen reaction module 4 includes an anaerobic reaction tank 41, a denitrification reaction tank 42, and an aerobic reaction tank 43. The anaerobic reaction tank 41 is connected to the outlet of the transfer tank 32, the denitrification reaction tank 42 is connected to the outlet of the anaerobic reaction tank 41, and the aerobic reaction tank 43 is connected to the outlet of the denitrification reaction tank 42. Therefore, the anaerobic reaction tank 41 creates an oxygen-deficient environment by strictly controlling dissolved oxygen (DO≤0.5mg / L), providing a dedicated "habitat" for functional microorganisms such as hydrolytic bacteria and denitrifying bacteria. Its core function lies in the synergistic linkage of hydrolysis acidification and denitrification, and the "degradation pretreatment" of macromolecular organic matter. Complex macromolecular organic matter such as polysaccharides, proteins, and oils, which are abundant in leachate from waste transfer stations, are difficult for microorganisms to directly utilize. During the hydrolysis and acidification process, hydrolytic enzymes (such as amylase and protease) in the tank actively "attack" the chemical bonds of large organic molecules, breaking them down into smaller molecules (such as glucose and amino acids) through hydrolysis. Subsequently, acidifying bacteria further convert these smaller molecules into volatile organic acids (VFAs) such as acetic acid, propionic acid, and butyric acid, increasing the biodegradability of the wastewater (B / C ratio) from 0.2-0.3 to 0.4-0.5. This reduces the difficulty of aerobic degradation in the subsequent aerobic tank. The hydraulic retention time (HRT) of this process is typically controlled at 4-6 hours, and the pH value is maintained at 6.5-7.5. Suitable environmental conditions allow the hydrolysis acidification efficiency to remain stable at over 60%, effectively reducing the organic load pressure on subsequent processes. Denitrifying bacteria use CODcr in wastewater (especially VFA produced by hydrolysis acidification) as a carbon and energy source, and gradually reduce NO3⁻ through a series of enzymatic reactions: first, it is converted into nitrite (NO2⁻) under the action of nitrate reductase, then into nitric oxide (NO) by nitrite reductase, then into nitrous oxide (N2O) by nitric oxide reductase, and finally into nitrogen gas (N2) under the catalysis of nitrite reductase. The aerobic reaction tank 43 controls the dissolved oxygen (DO) at 2-4 mg / L through a blower aeration system, creating a sufficient aerobic environment and providing an efficient "metabolic space" for aerobic heterotrophic bacteria, nitrifying bacteria and other microorganisms, achieving the dual goals of organic matter degradation and nitrate nitrogen generation.

[0019] like Figure 1 and Figure 3As shown, in this embodiment, the MBR deep treatment module 5 includes a membrane reactor 51 and a water storage tank 52. The membrane reactor 51 is connected to the effluent outlet of the aerobic reactor 43, and the water storage tank 52 is connected to the effluent outlet of the membrane reactor 51. Thus, the activated sludge in the biochemical reactor acts like a "miniature degradation factory," continuously decomposing pollutants such as CODcr and ammonia nitrogen in the leachate; while the membrane module acts as a "nanoscale filter," firmly locking in the high concentration of activated sludge, macromolecular organic matter, and suspended particles (8000-12000 mg / L) in the tank. This design achieves "independent and free control" of hydraulic retention time (HRT) and sludge retention time (SRT): HRT matches the pollutant degradation cycle as needed, and SRT can be extended to 30-50 days, allowing "long-lived bacteria" such as nitrifying and denitrifying bacteria to multiply in large numbers, forming a stable "super-strong degradation army."

[0020] Recalcitrant substances are repeatedly retained and continuously degraded within the reactor, eventually transforming into harmless carbon dioxide and water. The nitrified liquid, rich in nitrate nitrogen, is proportionally recycled back to the pre-stage anoxic reaction chamber system, providing ample "ammunition" for denitrifying bacteria and constructing a closed-loop treatment chain of "degradation-retention-recycle-re-degradation". like Figure 1 and Figure 3 As shown, in this embodiment, the effluent disinfection module 6 includes a disinfection module 61 and an oxidation module 62. The disinfection module 61 is connected to the outlet of the water storage tank 52, and the oxidation module 62 is connected to the outlet of the disinfection module 61. The disinfection module 61 and the oxidation module 62 work together with the clean water in the water storage tank 52, and the compliant effluent pipe 7 is connected to the outlet of the oxidation module 62. Therefore, the added disinfectant oxidant (such as sodium hypochlorite or chlorine dioxide) releases strong oxidizing groups, rapidly destroying the cell structure of residual bacteria, viruses, and other microorganisms in the water, rendering them inactive and completely blocking the risk of pathogen transmission. Furthermore, the oxidant can react with trace amounts of recalcitrant organic matter (such as trace amounts of humic acid and small-molecule heterocyclic compounds) that are not fully degraded by the MBR, decomposing them into harmless carbon dioxide, water, and inorganic ions. Simultaneously, it removes residual color and odor from the water, making the effluent not only "compliant" but also "high-quality."

[0021] like Figure 1 As shown, in this embodiment, a water inlet pipe 8 is provided on one side of the cabinet 1, and the water inlet pipe 8 is connected to the water inlet end of the oil-water separation physicochemical reaction module 2. Therefore, the water inlet pipe 8 is used to allow solid-liquid mixed wastewater to flow into the oil-water separation physicochemical reaction module 2 for the first step of wastewater treatment.

[0022] like Figure 1As shown in the figure, in this embodiment, a central control and maintenance channel 9 is provided on one side of the cabinet 1. Therefore, the central control and maintenance channel 9 is used for the operation and maintenance of each module.

[0023] like Figure 1 As shown in this embodiment, a maintenance ladder 10 is provided on one side of the cabinet 1. Therefore, the maintenance ladder 1 facilitates external maintenance operations by maintenance personnel through the maintenance window at the top of the cabinet 1.

[0024] The working principle of this utility model is as follows: Before the equipment is started, the solid-liquid mixed wastewater flows into the oil-water separation physicochemical reaction module 2 through the inlet pipe 8. The solid-liquid separation, dissolution, filtration and disinfection operations are carried out through the oil-water separation physicochemical reaction module 2, the biological bacteria degradation oxidation reaction module 3, the multi-stage oxygen reaction module 4, the MBR deep treatment module 5 and the effluent disinfection module 6. The clean water that meets the usage requirements is discharged from the qualified effluent pipe 7, realizing the integrated treatment of landfill leachate.

[0025] Although the embodiments of this utility model are described with reference to actual solutions, they do not constitute a limitation on the meaning of this utility model. For those skilled in the art, modifications to the implementation schemes and combinations with other schemes based on this specification are obvious.

Claims

1. An integrated landfill leachate treatment device, comprising a cabinet (1), an oil-water separation physicochemical reaction module (2), a biological bacterial degradation and oxidation reaction module (3), a multi-stage oxygen reaction module (4), an MBR deep treatment module (5), and an effluent disinfection module (6), characterized in that: The solid-liquid mixture is connected to the oil-water separation physicochemical reaction module (2), the biological bacteria degradation oxidation reaction module (3), the multi-stage oxygen reaction module (4), the MBR deep treatment module (5), and the effluent disinfection module (6) with the qualified effluent pipe (7) on one side of the cabinet (1).

2. The integrated landfill leachate treatment equipment according to claim 1, characterized in that: The oil-water separation physicochemical reaction module (2) includes a rotary mixing tank (21), a waste tank (22) and a sewage tank (23), wherein the sewage tank (23) and the waste tank (22) are respectively connected to the water outlet and the material outlet of the rotary mixing tank (21).

3. The integrated landfill leachate treatment equipment according to claim 2, characterized in that: The biological bacteria degradation and oxidation reaction module (3) includes a compound bacterial agent treatment module (31) and a transfer box (32). The compound bacterial agent treatment module (31) is connected to the outlet of the sewage tank (23), and the transfer box (32) is connected to the outlet of the compound bacterial agent treatment module (31).

4. The integrated landfill leachate treatment equipment according to claim 3, characterized in that: The multi-stage oxygen reaction module (4) includes an anaerobic reaction chamber (41), a denitrification reaction chamber (42), and an aerobic reaction chamber (43). The anaerobic reaction chamber (41) is connected to the outlet of the transfer tank (32), the denitrification reaction chamber (42) is connected to the outlet of the anaerobic reaction chamber (41), and the aerobic reaction chamber (43) is connected to the outlet of the denitrification reaction chamber (42).

5. The integrated landfill leachate treatment equipment according to claim 4, characterized in that: The MBR deep treatment module (5) includes a permeation membrane reaction tank (51) and a water storage tank (52). The permeation membrane reaction tank (51) is connected to the outlet of the aerobic reaction tank (43), and the water storage tank (52) is connected to the outlet of the permeation membrane reaction tank (51).

6. The integrated landfill leachate treatment equipment according to claim 5, characterized in that: The water disinfection module (6) includes a disinfection module (61) and an oxidation module (62). The disinfection module (61) is connected to the water outlet of the water storage tank (52), and the oxidation module (62) is connected to the water outlet of the disinfection module (61). The disinfection module (61) and the oxidation module (62) cooperate with the clean water in the water storage tank (52). The qualified water outlet pipe (7) is connected to the water outlet of the oxidation module (62).

7. The integrated landfill leachate treatment equipment according to claim 1, characterized in that: A water inlet pipe (8) is provided on one side of the cabinet (1), and the water inlet pipe (8) is connected to the water inlet end of the oil-water separation physicochemical reaction module (2).

8. The integrated landfill leachate treatment equipment according to claim 1, characterized in that: A central control maintenance channel (9) is provided on one side of the cabinet (1).

9. The integrated landfill leachate treatment equipment according to claim 1, characterized in that: A maintenance ladder (10) is provided on one side of the cabinet (1).

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