Intelligent aerobic stabilization treatment method and system for refuse landfill

Abstract

The invention discloses an intelligent aerobic stabilization treatment method and system for a refuse landfill. The method comprises the following steps: firstly, monitoring methane, oxygen and temperature in real time through a multi-parameter sensing network arranged in the heap body, and automatically regulating and controlling the gas pumping and injecting intensity based on data, so that the garbage heap body is quickly converted into an aerobic stable state within 15-20 days, and the explosion risk is eliminated. Meanwhile, the leachate subjected to deep treatment is used as a microbial nutrient solution to be recharged into a pile body, so that closed-loop treatment of the leachate and cyclic utilization of water resources are realized, and the closed-loop treatment and the cyclic utilization of the water resources are cooperatively carried out with a negative-pressure deodorization process. The system integrates three modules of intelligent monitoring and regulation, leachate closed-loop treatment and odor cooperative control, and supports modular rapid deployment and partitioned rolling operation. According to the method, rapid stabilization, multi-pollution cooperative treatment and resource utilization from the source are achieved, and reliable technical guarantee is provided for safe, efficient and environment-friendly excavation of the landfill and land recycling.

Description

Technical Field

[0001] This invention relates to the field of environmental protection and solid waste treatment technology, and in particular to an intelligent aerobic stabilization treatment method and system for landfills. Background Technology

[0003] Currently, the mainstream method for remediating existing landfills to achieve safe land reuse is excavation and removal. However, direct excavation faces significant risks: first, methane accumulated within the landfill can easily trigger an explosion; second, the excavation process results in the uncontrolled emission of malodorous gases, causing severe pollution; and third, leachate production increases dramatically and is difficult to treat. Traditional pretreatment methods often employ passive drainage or simple surface covering, which have long stabilization periods and uncertain effectiveness, failing to meet the demands for rapid, safe, and environmentally friendly excavation.

[0004] Therefore, there is an urgent need for an integrated treatment technology and system that can quickly eliminate safety hazards at the source, simultaneously control multiple types of pollution, and support efficient excavation. Summary of the Invention

[0005] This invention aims to overcome the shortcomings of existing technologies and provide a method and system for landfill remediation and land reuse based on intelligent aerobic stabilization. This method uses intelligent regulation to rapidly transition the landfill to an aerobic stable state and coordinates the treatment of leachate and odor, creating preconditions for safe, efficient, and environmentally friendly excavation and removal.

[0006] The technical solution adopted by this invention to solve its technical problem is: a method for intelligent aerobic stabilization treatment of landfills, comprising the following steps: S1. Construct an intelligent aerobic stabilization system: On the landfill to be treated, establish a multi-parameter sensing network covering the inside of the landfill to monitor methane concentration, oxygen concentration and temperature in real time; based on the monitoring data of the multi-parameter sensing network, automatically adjust the intensity and frequency of air extraction or injection into the landfill to enable the landfill to transition to an aerobic stable state within 15-20 days. S2. Implement closed-loop treatment and reuse of leachate: After deep treatment, at least a portion of the leachate generated from the waste dump is reused as a microbial nutrient solution in the waste dump in step S1. S3. Collaborative Odor Control: During the aerobic stabilization process in step S1, negative pressure is simultaneously applied to the work area to collect and treat the generated odor. S4. Excavate, screen, and remove the waste pile that has reached an aerobic stable state to clear the site.

[0007] In step S1, the intelligent aerobic stabilization system is constructed using skid-mounted modular equipment, and a zoned rolling operation mode is adopted for treatment.

[0008] The multi-parameter sensing network includes gas sensors and temperature sensors distributed throughout the stack.

[0009] In step S2, the advanced treatment of the leachate includes membrane treatment processes and / or advanced oxidation processes.

[0010] A smart aerobic stabilization treatment system for landfills to implement the aforementioned treatment method, characterized in that it comprises: The intelligent monitoring and control module includes a multi-parameter sensing network arranged inside the waste pile, and a control unit connected to the sensing network. The control unit is used to control the ventilation equipment according to the monitoring data. The leachate closed-loop treatment module includes a leachate collection unit, a deep treatment unit, and a reuse unit connected in sequence. The reuse unit transports the treated leachate to the landfill through pipelines. The odor control module includes a negative pressure collection device covering the work area and a gas treatment device connected thereto; The intelligent monitoring and control module, the leachate closed-loop treatment module, and the odor co-control module are integrated and set up to achieve coordinated operation.

[0011] At least one of the ventilation equipment in the intelligent monitoring and control module, the deep treatment unit in the leachate closed-loop treatment module, and the gas treatment device in the odor collaborative control module adopts a skid-mounted modular structure.

[0012] The control unit is equipped with a data-driven model, which is used to automatically calculate and output control commands for the ventilation equipment based on real-time monitored methane concentration, oxygen concentration and temperature data.

[0013] The reuse unit is equipped with a nutrient solution preparation component for adjusting the nutrient composition ratio of the reused leachate.

[0014] The beneficial effects of this invention are: (1) This invention enables the garbage pile to reach an aerobic stable state within 15-20 days through intelligent real-time control, fundamentally eliminating the risk of methane explosion, laying a solid foundation for safe excavation, and significantly shortening the overall treatment cycle; (2) The three process links of aerobic stabilization, leachate treatment and odor control are innovatively integrated. In particular, the treated leachate is reused as nutrient solution, which realizes the dual goals of pollution control and resource recovery, and achieves synergistic effect of zero wastewater discharge and improved treatment efficiency; (3) Data-driven intelligent control is adopted to replace traditional manual experience judgment, which is highly accurate and fast in response. The key equipment of the system adopts a skid-mounted modular design, which is flexible in deployment and supports rolling construction in different areas, greatly improving the adaptability and implementation efficiency of the project; (4) The entire process of implementing negative pressure deodorization and leachate control effectively solved the most prominent problems of odor and secondary pollution during the excavation and treatment process, enabling the project to proceed smoothly under strict environmental protection requirements. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the process flow of the method described in this invention.

[0017] Figure 2 This is a schematic diagram of the module composition and collaborative relationship of the system described in this invention. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] Figure 1 , Figure 2 The intelligent aerobic stabilization treatment method for landfills shown includes the following steps: S1. Construct an intelligent aerobic stabilization system: On the landfill to be treated, establish a multi-parameter sensing network covering the inside of the landfill to monitor methane concentration, oxygen concentration and temperature in real time; based on the monitoring data of the multi-parameter sensing network, automatically adjust the intensity and frequency of air extraction or injection into the landfill to enable the landfill to transition to an aerobic stable state within 15-20 days. S2. Implement closed-loop treatment and reuse of leachate: After deep treatment, at least a portion of the leachate generated from the waste dump is reused as a microbial nutrient solution in the waste dump in step S1. S3. Collaborative Odor Control: During the aerobic stabilization process in step S1, negative pressure is simultaneously applied to the work area to collect and treat the generated odor. S4. Excavate, screen, and remove the waste pile that has reached an aerobic stable state to clear the site.

[0021] In step S1, the intelligent aerobic stabilization system is constructed using skid-mounted modular equipment, and a zoned rolling operation mode is adopted for treatment.

[0022] The multi-parameter sensing network includes gas sensors and temperature sensors distributed throughout the reactor.

[0023] In step S2, the advanced treatment of the leachate includes membrane treatment processes and / or advanced oxidation processes.

[0024] A smart aerobic stabilization treatment system for landfills to implement the aforementioned treatment method includes: The intelligent monitoring and control module includes a multi-parameter sensing network arranged inside the waste pile, and a control unit connected to the sensing network. The control unit is used to control the ventilation equipment according to the monitoring data. The leachate closed-loop treatment module includes a leachate collection unit, a deep treatment unit, and a reuse unit connected in sequence. The reuse unit transports the treated leachate to the landfill through pipelines. The odor control module includes a negative pressure collection device covering the work area and a gas treatment device connected thereto; The intelligent monitoring and control module, the leachate closed-loop treatment module, and the odor co-control module are integrated to achieve coordinated operation.

[0025] At least one of the following components—the ventilation equipment in the intelligent monitoring and control module, the deep treatment unit in the leachate closed-loop treatment module, and the gas treatment device in the odor collaborative control module—adopts a skid-mounted modular structure.

[0026] The control unit is equipped with a data-driven model, which automatically calculates and outputs control commands for the ventilation equipment based on real-time monitored methane concentration, oxygen concentration, and temperature data.

[0027] The reuse unit is equipped with a nutrient solution preparation component to adjust the nutrient composition ratio of the reused leachate.

[0028] The implementation process of the method of this invention is as follows: First, the target landfill is surveyed and assessed. Then, an intelligent aerobic stabilization system is deployed (corresponding to step S1). Specifically, distributed sensors (forming a multi-parameter sensing network) are inserted into the landfill to transmit methane, oxygen, and temperature data to the control center in real time. The data-driven model built into the control center automatically analyzes the data and instructs ventilation equipment (such as fans) to either extract (expel methane) or inject (inject air), forcibly converting the landfill from an anaerobic to an aerobic state. This process typically lasts 15-20 days until the monitoring indicators stabilize within a safe range.

[0029] During the aerobic stabilization process, the generated leachate is collected (step S2) and sent to a treatment chain consisting of "pretreatment + biological treatment + membrane deep treatment (such as NF / RO)". Of the clarified liquid after deep treatment, a portion meets the standards for discharge, while the other portion is pumped back into the landfill as a nutrient solution for microorganisms to promote the degradation of organic matter. Simultaneously, the entire operating area is covered by a negative pressure gas collection hood (step S3), and the collected gas is discharged after biological deodorization or chemical scrubbing.

[0030] Once the excavated material reaches a stable state, the process can proceed to the orderly excavation stage, which involves dividing the material into zones and layers (step S4). The excavated humus and other materials can be utilized as resources.

[0031] like Figure 2 As shown, the system implementing the above method mainly comprises three integrated modules: an intelligent monitoring and control module, a leachate closed-loop treatment module, and an odor control module. These three modules are linked together through a central control system. For example, when an increase in methane concentration is detected in a certain area, the control unit will not only increase the pumping intensity in that area, but may also prompt the leachate reuse unit to adjust the nutrient solution spraying volume in that area. Simultaneously, the odor control module will enhance gas collection in that area, demonstrating multi-process coordination.

[0032] Preferably, the fan units, membrane treatment equipment, deodorization towers, etc. in the system can all be designed as standard skid-mounted modules, which are convenient for truck transportation and quick on-site assembly, and are especially suitable for multi-point, rolling construction operations.

[0033] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A method for intelligent aerobic stabilization treatment of landfills, characterized in that, Includes the following steps: S1. Construct an intelligent aerobic stabilization system: On the landfill to be treated, establish a multi-parameter sensing network covering the inside of the landfill to monitor methane concentration, oxygen concentration and temperature in real time; based on the monitoring data of the multi-parameter sensing network, automatically adjust the intensity and frequency of air extraction or injection into the landfill to enable the landfill to transition to an aerobic stable state within 15-20 days. S2. Implement closed-loop treatment and reuse of leachate: After deep treatment, at least a portion of the leachate generated from the waste dump is reused as a microbial nutrient solution in the waste dump in step S1. S3. Collaborative Odor Control: During the aerobic stabilization process in step S1, negative pressure is simultaneously applied to the work area to collect and treat the generated odor. S4. Excavate, screen, and remove the waste pile that has reached an aerobic stable state to clear the site.

2. The intelligent aerobic stabilization treatment method for landfills according to claim 1, characterized in that, In step S1, the intelligent aerobic stabilization system is constructed using skid-mounted modular equipment, and a zoned rolling operation mode is adopted for treatment.

3. The intelligent aerobic stabilization treatment method for landfills according to claim 1, characterized in that, The multi-parameter sensing network includes gas sensors and temperature sensors distributed throughout the stack.

4. The intelligent aerobic stabilization treatment method for landfills according to claim 1, characterized in that, In step S2, the advanced treatment of the leachate includes membrane treatment processes and / or advanced oxidation processes.

5. A smart aerobic stabilization treatment system for landfills for implementing the treatment method according to any one of claims 1-4, characterized in that, include: The intelligent monitoring and control module includes a multi-parameter sensing network arranged inside the waste pile, and a control unit connected to the sensing network. The control unit is used to control the ventilation equipment according to the monitoring data. The leachate closed-loop treatment module includes a leachate collection unit, a deep treatment unit, and a reuse unit connected in sequence. The reuse unit transports the treated leachate to the landfill through pipelines. The odor control module includes a negative pressure collection device covering the work area and a gas treatment device connected thereto; The intelligent monitoring and control module, the leachate closed-loop treatment module, and the odor co-control module are integrated and set up to achieve coordinated operation.

6. The intelligent aerobic stabilization treatment system for landfills according to claim 5, characterized in that, At least one of the ventilation equipment in the intelligent monitoring and control module, the deep treatment unit in the leachate closed-loop treatment module, and the gas treatment device in the odor collaborative control module adopts a skid-mounted modular structure.

7. The intelligent aerobic stabilization treatment system for landfills according to claim 5, characterized in that, The control unit is equipped with a data-driven model, which is used to automatically calculate and output control commands for the ventilation equipment based on real-time monitored methane concentration, oxygen concentration and temperature data.

8. The intelligent aerobic stabilization treatment system for landfills according to claim 5, characterized in that, The reuse unit is equipped with a nutrient solution preparation component for adjusting the nutrient composition ratio of the reused leachate.

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