KR20210157593A - System and method for management of Landfill leachate - Google Patents

Abstract

According to the present invention, disclosed are a system and a method for managing a landfill leachate. The system for managing a landfill leachate according to one aspect of the present invention includes: a leachate chamber into which pretreated solid waste is introduced; a leaching reaction reactor including a leachate bed reactor, a leachate tank and an upflow anaerobic sludge blanket interconnected via an electrical circuit, and performing leachate treatment of the pretreated solid waste; and a control unit electrically connecting the leaching reaction reactor and PLC to control and monitor a leachate treatment process through a preset automatic program.

Description

Landfill leachate management system and method

The present invention relates to a landfill leachate management system and method, and more particularly, to a landfill leachate management system and method capable of separating a single type of waste at a time and providing full control over a device for managing the leachate through an automatic program. .

In general, leachate refers to dirty water that is leached from a waste (food waste) final disposal site. Leachate is also called leachate, and generally has high biochemical oxygen demand (BOD) and chemical oxygen demand (COD) values because of perishable organic matter. In addition, leachate from landfills for industrial waste often contains various water pollutants depending on the type and quality of waste, and there is a high risk of contaminating public waters and groundwater. is to be equipped.

However, the leachate treatment facility according to the prior art was cumbersome to manually separate the waste, and the leachate has different properties and shapes depending on the type of waste, the amount of landfill, the landfill method, rainfall, the content of heavy metals, the nature of the soil, etc. Therefore, there was a problem that management was not effective because it was not possible to treat all these points in consideration of comprehensively.

Korean Patent Publication No. 2020-0038670 (published on April 14, 2020)

The present invention has been proposed to solve the above problems, and it is an object of the present invention to provide a landfill leachate management system and method capable of separating a single type of waste at a time and completely controlling an apparatus for managing leachate through an automatic program. There is this.

Other objects and advantages of the present invention may be understood by the following description, and will be more clearly understood by an embodiment of the present invention. Further, it will be readily apparent that the objects and advantages of the present invention can be realized by the means and combinations thereof indicated in the claims.

According to an aspect of the present invention, there is provided a landfill leachate management system, comprising: a leachate chamber into which pretreated solid waste is introduced; a leachate reaction reactor comprising a leachate bed reactor, a leachate tank and an upflow anaerobic sludge blanket connected to each other through an electrical circuit, the leachate reaction reactor performing leachate treatment of the pretreated solid waste; and a control unit that electrically connects the leaching reaction reactor and a PLC to control and monitor a leachate treatment process (process) through a preset automatic program.

The pre-treated solid waste is characterized in that it is separated by a robotic waste separator controlled by an Arduino microcontroller.

The robotic waste separator is characterized in that it consists of a controller device based on the ATmega 328 data sheet including a plurality of digital input pins, output pins and basic accessories.

It is characterized in that the solid waste introduced into the leachate chamber is diluted with high dilution or low stone according to a standard and supplied to the leachate bed reactor.

The solid waste is crushed and decomposed into small particles before being fed to the leaching bed reactor for pretreatment, but it is characterized in that the organic loading rate is increased to facilitate the decomposition.

The leaching reaction reactor may further include a sensor unit installed on one side to measure turbidity, suspended matter, dissolved oxygen, and COD of the leachate.

The PLC converts the value measured by the sensor unit into a control signal.

According to another aspect of the present invention, there is provided a method for managing landfill leachate in a landfill leachate management system, the method comprising: in a leachate chamber, introducing pretreated solid waste; performing leachate treatment of the pretreated solid waste by a leaching reaction reactor comprising a leachate bed reactor, a leachate tank and an upflow anaerobic sludge blanket interconnected via an electrical circuit; and controlling and monitoring, by a control unit electrically connecting the leaching reaction reactor and the PLC, to a treatment process (process) of the leachate through a preset automatic program.

The pre-treated solid waste is characterized in that it is separated by a robotic waste separator controlled by an Arduino microcontroller.

The robotic waste separator is characterized in that it consists of a controller device based on the ATmega 328 data sheet including a plurality of digital input pins, output pins and basic accessories.

It is characterized in that the solid waste introduced into the leachate chamber is diluted with high dilution or low stone according to a standard and supplied to the leachate bed reactor.

The solid waste is crushed and decomposed into small particles before being fed to the leaching bed reactor for pretreatment, but it is characterized in that the organic loading rate is increased to facilitate the decomposition.

The performing of the leachate treatment may further include the step of measuring, by a sensor installed at one side of the leaching reaction reactor, turbidity, suspended matter, dissolved oxygen, and COD of the leachate.

The PLC converts the value measured by the sensor unit into a control signal.

According to one aspect of the present invention, there is an effect of separating a single type of waste at a time and completely controlling the leachate through an automatic program.

In addition, it is possible to effectively manage the leachate treatment process by monitoring the leachate treatment process in real time.

In addition, there is an effect of preventing the occurrence of diseases by providing a more comfortable environment through effective control of the leachate.

The effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description. .

The following drawings attached to this specification illustrate preferred embodiments of the present invention, and serve to further understand the technical spirit of the present invention together with specific contents for carrying out the invention, so the present invention is in such drawings It should not be construed as being limited only to the items listed.
1 is a schematic configuration diagram of a landfill leachate management system according to an embodiment of the present invention;
2 is a schematic block diagram of a robotic waste separator according to an embodiment of the present invention;
3 is a diagram schematically illustrating a process for treating leachate according to an embodiment of the present invention;
4 is a block diagram of a fuzzy rule according to an embodiment of the present invention;
5 is a schematic flowchart of a method for managing leachate in a landfill according to an embodiment of the present invention.

The above objects, features and advantages will become more apparent through the following detailed description in relation to the accompanying drawings, and accordingly, those of ordinary skill in the art to which the present invention pertains can easily implement the technical idea of the present invention. There will be. In addition, in the description of the present invention, if it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Hereinafter, a preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

Throughout the specification, when a part "includes" a certain element, it means that other elements may be further included, rather than excluding other elements, unless otherwise stated. In addition, the “… The term “unit” means a unit that processes at least one function or operation, which may be implemented as hardware or software or a combination of hardware and software.

1 is a schematic configuration diagram of a landfill leachate management system according to an embodiment of the present invention, FIG. 2 is a schematic block diagram of a robotic waste separator according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention 4 is a diagram schematically illustrating a process for treating leachate according to an example. FIG. 4 is a block diagram of a purge rule according to an embodiment of the present invention.

In the description of this embodiment, leachate may refer to dirty water leached from a landfill in which contaminants such as food waste, livestock manure, industrial waste, and the like are buried.

Referring to FIG. 1 , the landfill leachate management system according to the present embodiment includes a leachate chamber 100 , a leachate reaction reactor 200 , and a controller 300 .

The pre-treated solid waste is introduced into the leachate chamber 100 . At this time, the pretreated solid waste may be separated by a robotic waste separator (not shown) controlled by the Arduino microcontroller. The robotic waste separator (not shown) may include components as shown in FIG. 2 , and is connected to the front end of the leachate chamber 100 and performs waste separation. In this case, in the description of the present embodiment, the wastes may be wet wastes and dry wastes. A robotic waste separator (not shown) can separate waste as the motor rotates in the right direction for wet waste and moves to the left for dry waste. The robotic waste separator (not shown) may consist of a controller unit based on the ATmega 328 data sheet with multiple digital input pins, output pins and basic accessories. Meanwhile, the solid waste introduced into the leachate chamber 100 may be diluted with high dilution or low stone according to a standard and supplied to the leachate bed reactor 210 . Meanwhile, the pretreatment of the solid waste may be performed by crushing and decomposing into small particles before being fed to the leaching bed reactor 210, and facilitating the decomposition by increasing the organic loading rate. In explaining this example, the size of the crushed solid waste particles is maintained at 0.8 cm together with the inoculation composition, and the total solids to which waste activated sludge is added may be 4.2% by weight, 68.3% volatile solids, and pH7.4. At this time, the reason for pre-treating the waste is to biodegrade the mixed composition of the waste by adding acid, alkali, ultrasonic waves, heat, chemical, mechanical and biological methods under aerobic conditions (conditions favoring oxygen in the air).

The leachate reaction reactor 200 treats the leachate of the pretreated solid waste introduced from the leachate chamber 100 . The leaching reaction reactor 200 includes a leach bed reactor 210 , a leachate tank 220 , and an upflow anaerobic sludge blanket 230 , which are interconnected via an electrical circuit. The leachate bed reactor 210 may have a leachate tank 220 at the bottom, and the leachate bed reactor 210 and the leachate tank 220 may be connected by a plurality of different vertical columns. Meanwhile, a water level sensor for controlling the supply level of the leachate may be further included at one side of the leachate tank 220 . The water level sensor may detect the amount of leachate supplied to the leachate tank 220 , and through this, the controller 300 controls the leachate management system when the amount of leachate supplied to the leachate tank 220 exceeds a preset threshold. can be controlled to operate more effectively. In addition, the upstream anaerobic sludge blanket 230 may serve as a kind of anaerobic digester. Anaerobic digestion may mean a process in which biodegradable organic materials are decomposed by microorganisms in anaerobic conditions. In this decomposition process, a gas mixture consisting mainly of methane and carbon dioxide is produced, and this mixture may contain small amounts of hydrogen, hydrogen sulfide, ammonia, and the like. Anaerobic digestion is a phenomenon that occurs widely in ecosystems, and occurs actively in natural environments such as wetlands, lakes and sea sediments, as well as in the living body of ruminants. On the other hand, this anaerobic digestion process is artificially utilized for purposes such as waste or sewage treatment or to produce fuel. Various anaerobic digestion technologies have been developed and used to treat wastes with high organic matter content, such as livestock manure, sludge from sewage treatment plants, or industrial wastewater, and to obtain biogas useful for human life from this process. Here, the most important variables affecting the anaerobic digestion process are pH and alkalinity, temperature, inoculum, substrate physical properties, substrate composition, carbon/nitrogen, total solids, metal ions-potassium and sodium. In ^{addition to adding light metals such as Mg 2+} , Na ⁺ , K ⁺ , Ca ²⁺ and heavy metals Zn ²⁺ , Cd ²⁺ , Hg ²⁺ etc., long-chain fatty acids (LCFAs) were used to evaluate their effect on the anaerobic digestion process. It is preferable to perform an analysis of At this point, the parameters can be chemically analyzed using standard chemical procedures. The leachate of the solid waste introduced into the leaching reaction reactor 200 may be treated by sequentially moving the leachate bed reactor 210 , the leachate tank 220 , and the upstream anaerobic sludge blanket 230 . Such a waste leachate treatment flow is schematically illustrated in FIG. 3 . On the other hand, when the solid waste is livestock manure, methane emitted here can be confirmed in the leaching bed reactor (210). According to this embodiment, the residence time of the solid waste in the leaching bed reactor 210 may determine the acetic acid decomposition, and the upstream anaerobic sludge blanket 230 may serve to decompose the methane.

The upflow anaerobic sludge blanket 230 according to this embodiment is an anaerobic treatment method of organic wastewater, which forms granule sludge with high density and high sedimentation in the reaction tank, and raises organic wastewater containing soluble BOD (Biochemical Oxygen Demand) upward. High-load, high-speed processing can be performed by allowing the flow to flow and making contact with the sludge blanket formed.

On the other hand, the leaching reaction reactor 200 may further include a sensor unit installed on one side, wherein the sensor unit can measure leachate turbidity, suspended matter, dissolved oxygen, and COD (Chemical Oxygen Demand). In this case, the sensor unit may be composed of an infrared proximity sensor and a soil moisture sensor.

The control unit 300 generally controls the landfill leachate management system. The controller 300 may electrically connect the leaching reaction reactor 200 and a programmable logic controller (PLC) to control and monitor the leachate treatment process (process) through a preset automatic program. Here, the PLC may serve to convert the value measured by the sensor unit into a control signal.

Meanwhile, the controller 300 may control the leaching reaction reactor 200 using a fuzzy rule. At this time, the block diagram of the fuzzy rule is as shown in FIG. 4 .

Meanwhile, the landfill leachate management system according to the present embodiment is configured based on the IoT cloud to manage the leachate treatment process. That is, the landfill leachate management system can communicate with a separately configured IoT cloud server and monitor the progress of the leachate treatment (management) process in real time by linking a separate monitoring terminal with the IoT cloud server. As such, when the landfill leachate management system is configured based on the IoT cloud, it can be applied when forming a smart city.

5 is a schematic flowchart of a method for managing leachate in a landfill according to an embodiment of the present invention.

Referring to FIG. 5 , the method for managing leachate in a landfill according to the present embodiment includes the step of introducing the pretreated solid waste into the leachate chamber 100 ( S510 ), a leachate bed reactor 210 connected to each other through an electrical circuit; The leachate reaction reactor 200 including the leachate tank 220 and the upflow anaerobic sludge blanket 230 performs the leachate treatment of the pretreated solid waste (S520) and electrically connects the leachate reaction reactor 200 and the PLC. and a step (S530) of controlling and monitoring, by the control unit 300 connected to the leachate, the treatment process (process) of the leachate through a preset automatic program. The pretreated solid waste may be separated by a robotic waste separator (not shown) controlled by an Arduino microcontroller. In this case, the robotic waste separator (not shown) may be configured as an ATmega 328 data sheet-based controller device including a plurality of digital input pins, output pins, and basic accessories. Meanwhile, the solid waste introduced into the leachate chamber 100 may be diluted with high dilution or low stone according to a standard and supplied to the leachate bed reactor 210 .

The solid waste according to this embodiment is pulverized and decomposed into small particles before being supplied to the leaching bed reactor 210 for pretreatment, but the organic loading rate can be increased to facilitate decomposition.

Meanwhile, the performing of the leachate treatment may further include measuring, by a sensor installed at one side of the leaching reaction reactor 200 , turbidity, suspended matter, dissolved oxygen, and COD of the leachate.

Methods according to an embodiment of the present invention may be implemented as an application or implemented in the form of program instructions that may be executed through various computer components and recorded in a computer-readable recording medium. The computer-readable recording medium may include program instructions, data files, data structures, etc. alone or in combination. The program instructions recorded on the computer-readable recording medium are specially designed and constructed for the present invention, and may be known and used by those skilled in the art of computer software. Examples of the computer-readable recording medium include a hard disk, a magnetic medium such as a floppy disk and a magnetic tape, an optical recording medium such as a CD-ROM and DVD, and a magneto-optical medium such as a floppy disk. media) and hardware devices specially configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine language codes such as those generated by a compiler, but also high-level language codes that can be executed by a computer using an interpreter or the like. The hardware device may be configured to operate as one or more software modules for carrying out the processing according to the present invention, and vice versa.

While this specification contains many features, such features should not be construed as limiting the scope of the invention or the claims. Also, features described in individual embodiments herein may be implemented in combination in a single embodiment. Conversely, various features described in a single embodiment herein may be implemented in various embodiments individually, or may be implemented in appropriate combination.

Although the operations have been described in a specific order in the drawings, it should not be understood that the operations are performed in the specific order as illustrated, or that all of the described operations are performed in a continuous order, or to obtain a desired result. Multitasking and parallel processing can be advantageous in certain circumstances. In addition, it should be understood that the division of various system components in the above-described embodiments does not require such division in all embodiments. The aforementioned app components and systems may generally be implemented as a package in a single software product or multiple software products.

The present invention described above, for those of ordinary skill in the art to which the present invention pertains, various substitutions, modifications and changes are possible within the scope without departing from the technical spirit of the present invention. It is not limited by the drawings.

100: leachate chamber
200: leaching reaction reactor
210 leaching bed reactor
220: leachate tank
230: Upflow anaerobic sludge blanket
300: control unit

Claims (14)

a leachate chamber into which the pretreated solid waste is introduced;
a leachate reaction reactor comprising a leachate bed reactor, a leachate tank and an upflow anaerobic sludge blanket connected to each other through an electrical circuit, the leachate reaction reactor performing leachate treatment of the pretreated solid waste; and
and a control unit that electrically connects the leaching reactor and a PLC to control and monitor a leachate treatment process (process) through a preset automatic program. The method of claim 1,
The pretreated solid waste is a landfill leachate management system, characterized in that it is separated by a robotic waste separator controlled by an Arduino microcontroller. 3. The method of claim 2,
The robotic waste separator is a landfill leachate management system, characterized in that it consists of a controller device based on the ATmega 328 data sheet including a plurality of digital input pins, output pins and basic accessories. The method of claim 1,
The landfill leachate management system, characterized in that the solid waste introduced into the leachate chamber is diluted with high dilution or low stone according to a standard and supplied to the leachate bed reactor. The method of claim 1,
The landfill leachate management system, characterized in that the solid waste is crushed and decomposed into small particles before being supplied to the leach bed reactor for pretreatment, and the organic loading rate is increased to facilitate the decomposition. The method of claim 1,
The leachate management system according to claim 1, wherein the leaching reaction reactor further includes a sensor unit installed on one side to measure turbidity, suspended matter, dissolved oxygen, and COD of the leachate. The method of claim 1,
The PLC converts the value measured by the sensor unit into a control signal. A method for managing landfill leachate in a landfill leachate management system, the method comprising:
the leachate chamber introducing the pretreated solid waste;
performing leachate treatment of the pretreated solid waste by a leaching reaction reactor comprising a leachate bed reactor, a leachate tank and an upflow anaerobic sludge blanket interconnected via an electrical circuit; and
and controlling and monitoring, by a controller electrically connecting the leaching reaction reactor and PLC, through a preset automatic program to control and monitor a leachate treatment process (process). 9. The method of claim 8,
The pre-treated solid waste is a landfill leachate management method, characterized in that it is separated by a robotic waste separator controlled by an Arduino microcontroller. 10. The method of claim 9,
The method of claim 1, wherein the robotic waste separator comprises a controller device based on the ATmega 328 data sheet including a plurality of digital input pins, output pins and basic accessories. 9. The method of claim 8,
The method of claim 1, wherein the solid waste introduced into the leachate chamber is diluted with high dilution or low stone according to a standard and supplied to the leachate bed reactor. 9. The method of claim 8,
The method of claim 1, wherein the solid waste is crushed and decomposed into small particles before being supplied to the leachate reactor, and the organic loading rate is increased to facilitate the decomposition. 9. The method of claim 8,
The step of performing the leachate treatment comprises:
The method for managing leachate in a landfill, comprising the step of measuring, by a sensor installed at one side of the leaching reactor, turbidity, suspended matter, dissolved oxygen, and COD of the leachate. 9. The method of claim 8,
The PLC converts the value measured by the sensor unit into a control signal.

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