KR101201224B1 - Monitering method for early stabilization of landfill - Google Patents

Abstract

PURPOSE: A monitoring method for pre-stabilizing landfill is provided to conserve costs needed for operational processes by early satisfying aerobic decomposition conditions. CONSTITUTION: A monitoring method for pre-stabilizing landfill includes the following steps: 5-10 um aerosol of moisture or chemical carried in air is supplied to waste in landfill in order to convert the waste into an aerobic state(S100); the decomposition of the waste is accelerated; the distribution state of heat generated from the waste decomposition process is monitored using an infrared ray-based camera(S110); the stabilization of the landfill is verified through a primary monitoring step(S120); unless the landfill is stabilized, the air and moisture injecting step is repeated; if the landfill is stabilized, the moisture injecting step is stopped, and the air is supplied to dry the landfill(S130); the stabilization of the landfill is verified through a secondary monitoring step(S140); unless the landfill is insufficiently dried, the air injecting step is repeated; and if the landfill is sufficiently dried, the air injecting steep is stopped(S150). [Reference numerals] (AA) Start; (BB) End; (S100) Injecting air and aerosol; (S110) Primarily monitoring landfill; (S120) Stabilized?; (S130) Injecting and drying air without aerosol; (S140) Secondarily monitoring the landfill; (S150) Dried?

Description

MONITORING METHOD FOR EARLY STABILIZATION OF LANDFILL}

The present invention relates to a monitoring method for pre-stabilization of landfill, and more particularly, injecting a chemical solution and water into the landfill in the form of an aerosol to induce pre-stabilization of undegradable substances by promoting decomposition of aerobic microorganisms. The present invention relates to a monitoring method for landfill pre-stabilization improved to detect the extent quickly and induce the drying of landfill waste, thereby reducing the landfill recycling period and maximizing the efficiency of efficient landfill maintenance.

According to a survey by the Ministry of Environment, Korea has 1,278 landfills in 2008 and 220 landfills in use. Many of these projects are expected to continue to be refurbished into the landfill project, which is being promoted by the Ministry of Environment, as well as the landfill project.

In addition, the 'circular landfill maintenance project' is maximizing the value of energy of discarded wastes by adding fueling process to enable not only the life of existing landfills but also the recycling of excavated combustible wastes (RDF, etc.).

In the revised and revised 2010 Landfill Site Maintenance Guidelines and Landfill Circulation Maintenance Project, the pre-stabilization assessment (water content and biodegradability of landfill gas, flammable wastes) was carried out to determine whether to pre-stabilize the process. To judge.

In the past, the pre-stabilization method simply injects external air into the landfill and replaces the anaerobic environment with aerobic to temporarily reduce the generation of methane and odor components, and supplies leachate or effluent to induce biodegradation of organic materials. The way was done.

However, existing technologies, along with technical limitations, can cause serious problems in actual operation. In the former case, the interior of the landfill is replaced by aerobic air due to external air and the rapid drying process reduces the occurrence of temporary methane and odor components.However, the solid fuel is caused by the influx of water during excavation, screening, or excessive organic substances in the process of recycling. Causes problems such as poor quality of the product and bad smells in storage and transportation. In the latter case, it is possible to increase the biodegradation efficiency in the landfill by supplying leachate or effluent in part, but technically, partial hydration and lack of water due to channeling is caused by leachate or effluent. Generated to reduce the decomposition efficiency of aerobic microorganisms of organic matter in the landfill, particularly excessive water supply can be a major threat to landfill stability. In addition, additional facility investment is required due to the narrow impact radius, and the efficiency and economic efficiency are very low in the operation process such as leachate or effluent transport and bad smell in the operation process. Moreover, although the utility is recognized as a method for treating leachate or effluent, the management period of landfill site is limited in terms of stabilization of landfill and recycling use of landfill based on 'recycle landfill maintenance project' and 'endfill landfill maintenance'. Rather, it entails enormous energy costs in order to remove excess water content when fueling or treating combustible waste in landfill waste (eg incineration).

In particular, as far as is known, there has been no attempt to disclose an effective and efficient monitoring method that can be used for landfill stabilization management by measuring the stabilization status of landfills in real time and receiving feedback of the measurement results. There is also a need for development.

That is, since the water content of the waste in the landfill is high due to the water added during the excavation and sorting operations, which are subsequent processes after the landfill is stabilized, it causes a drastic drop in the excavation and sorting efficiency. There was a disadvantage of causing an increase of.

The present invention was created by the necessity of technology development as described above, in order to pre-stabilize the landfill injecting water and chemicals in the form of an aerosol (Aerosol), using a variety of monitorable means of the landfill By detecting the stabilization status of each section and controlling the water supply or air supply according to the result, the stabilization equipment can be operated efficiently to reduce the cost, and after stabilization, the waste and landfill soil in the landfill are dried to improve the work efficiency during excavation and sorting operations. Its main purpose is to provide a monitoring method for landfill pre-stabilization that can be increased.

The present invention is a means for achieving the above object, by supplying the water or chemical liquid in the form of an aerosol of 5-10 ㎛ size to the waste in the landfill by supplying the air as a conveying means to convert the waste in the landfill into aerobic state to promote decomposition Air and moisture injection step (S100); A landfill primary monitoring step (S110) of photographing and confirming a heat distribution state generated by decomposition of landfill waste by aerobic microorganisms after an air and water injection step (S100) with an infrared camera; A stabilization check step (S120) of reading whether the stabilization criteria has been reached while monitoring the landfill primary monitoring step (S110); As a result, if the stabilization did not reach the air and moisture injection step (S100) to repeat the subsequent steps, if the stabilization is reached, the injection of the air injection drying step to stop the water injection and supply only air to dry the landfill (S130) ; A landfill secondary monitoring step (S140) of reading and confirming an image taken by an infrared camera to determine whether drying is performed after the air injection drying step (S130); If the landfill secondary monitoring step (S140) to confirm whether the drying is complete, and if the drying standard has not been reached, return to the air injection drying step (S130) and repeat the subsequent steps, if the drying standard is reached, stop the air injection and the process It provides a monitoring method for prefilling the landfill, characterized in that consisting of; confirming the drying step (S150) to terminate.

delete

delete

delete

delete

According to the present invention, since the reach distance that can be spread by conveying the micro-sized water and the chemical liquid through the air is long, it is possible to supply the water over the entire landfill without using a plurality of lances, thereby prematurely aerobic decomposition conditions By meeting and activating pre-stabilization, monitoring landfills by section and integrating the results into control techniques, you can reduce operating costs and improve the processing efficiency of subsequent processes.

1 is an exemplary view showing a water supply device for pre-stabilization of landfill according to the present invention.
2 is a flowchart showing a monitoring method according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention is to provide a state in which the aerobic microorganisms to optimize the landfill by supplying water or chemical liquid with water to stabilize the landfill to promote the decomposition of the waste in the landfill, the decomposition state of each landfill, that is, The stabilization state is detected by various detection means, and the detected information is fed back to enable more efficient pre-stabilization work.

To this end, the present invention can be applied to any structure including a water supply means for supplying water or chemical liquid to the landfill, it is not necessary to be limited only to a specific system as described below.

That is, the water supply means to be described later is only one preferred embodiment according to the present invention, the monitoring method according to the present invention can be applied to both the water or chemical liquid supply type landfill stabilization or landfill pre-stabilization system including the same.

At this time, the means for detecting the stabilized state may be applied to all or part of the temperature detection unit, methane gas detection unit, carbon dioxide detection unit, infrared camera, and the like.

For example, in the case of the temperature detection unit, when the landfill is sufficiently decomposed by aerobic microorganisms, it becomes a kind of fermentation and has a certain level of temperature distribution, and detects whether the stabilization is in progress or completed on the basis of the temperature distribution for each section of the landfill. It can be read, a method of determining whether or not stabilization by detecting the decomposition heat of the landfill may be an example of using a temperature detection unit.

In addition, even in the case of using a methane gas or carbon dioxide detection unit, the amount (concentration) of methane gas and carbon dioxide varies depending on the degree of decomposition by aerobic microorganisms. In the case of the infrared camera, the temperature distribution varies according to the degree of decomposition of aerobic microorganisms as described above, and the infrared camera photographs the landfill by a certain radius and reads the captured image. It will be in the form of reading the stabilization of the interval.

In this case, the infrared camera may be a type of heat sensing unit, and the heat sensing unit is not necessarily limited to the infrared camera.

In addition, the water supply unit for supplying water or a chemical solution to make the landfill in a semi-aerobic or aerobic state may be various, in the present invention, it is most preferred to use the form as illustrated in FIG.

That is, as mentioned in the prior art, the form for supplying water is not a simple supply type, but an aerosol form, such as water, after atomizing to a size of about 10 μm, more preferably at least 5 μm, and then It is best configured to maximize the reach by injecting into the air. This is because the reach is long, so the processing area is large, which is very useful and effective in terms of cost as well as efficiency and processing time.

In this case, the air may be supplied with a chemical solution (including aerobic microorganisms that promote decomposition when the landfill is converted into an aerobic state) in addition to the aerosol which is the atomized water.

In addition, when spraying and supplying with air in the form of aerosol, according to the experiment, the time to reach the required water function in the reactor 10m distance is about 30 minutes depending on the amount of aerosol supplied and the amount of air flow injected water and chemical liquid Supply could be confirmed.

Accordingly, the present invention makes the aerosol state of the fine particles by atomizing the water or the moisture and the chemical liquid, and by supplying the air as a conveying means to increase the radius of water that can be supplied by at least one lance at least 2-3 times than conventional It becomes possible.

This moisture supply unit is composed of a supply device 100, the distribution unit 200 and the injection unit 300, as shown in the example of Figure 1, the supply unit 100 is a blower 110 for injecting air ), The blower 110 is a kind of blower equipment that introduces external air and sprays the supply pipe 120 through the discharge side.

The supply pipe 120 is connected to the distribution unit 200.

In addition, the supply device 100 also includes an aerosol generator 130.

The aerosol generator 130 is a device that makes the supplied water or water and the chemical liquid into an aerosol state having a size at least about 5 μm, and may use a dedicated nozzle or ultrasonic waves.

In addition, although not shown, the aerosol generator 130 is connected to a water supply or a chemical liquid supply container.

In addition, the discharge side of the aerosol generator 130 is connected to the supply pipe 120 which is a blower pipe blown by the blower 110 through the discharge pipe 140.

At this time, if the connection portion of the discharge pipe 140 and the supply pipe 120 is configured in the venturi form by the flow rate of the air to advance the supply pipe 120 at a high speed (average flow rate of the blower is about 10 ± 5m / sec) The suction pressure is generated at the connecting portion, and the suction pressure naturally sucks a myriad of aerosols discharged through the discharge pipe 140 into the air to be blown, and the air can be conveyed according to the air blowing speed by using the air as a conveying means. .

In addition, the opening and closing valve 150 may be further added to a part of the length of the discharge tube 140. When the opening and closing valve 150 is locked, only the air blowing through the blower 110 may be provided.

This is because the air blown by the operation of the blower 110 is a high-temperature air having a considerable amount of heat up to 80 ° C. in the summer, and only when the landfill is determined to be converted into an aerobic state, only by operating the shutoff valve 150. It can also provide the advantage of controlling only the blowing air to perform the drying function.

On the other hand, the distribution unit 200 is installed at the end of the supply pipe 120.

The distribution unit 200 includes a distributor 210. The distributor 210 has a single input and a plurality of outputs, and connects a plurality of distribution pipes 220 to one supply pipe 120 to provide a pipe water. Can contribute to reducing

That is, since the landfill is very wide, a plurality of injection lances 310 constituting the plurality of injection units 300 should be provided at regular intervals. Since there was a disadvantage in that the number of pipes was increased and the equipment was complicated because of the connection form, in the present invention, the plurality of distribution pipes having a plurality of injection lances 310 in the short distance from the distributor 210 as one starting point. By being connected to the 220 will be a form in which a plurality of injection lances 310 are connected to one supply pipe (120).

Therefore, even if only a few supply pipes 120 are provided to cover the size of the landfill within the range in accordance with the treatment plan can contribute to reducing equipment costs, labor costs, material costs and the like.

In addition, although not shown, if a separate opening adjustment valve is attached to each distribution pipe 220, partial supply control is also possible according to the local state of the landfill. Of course, this is preferable to manual control, but of course, automatic control is also possible when a control system and a solenoid valve are installed. However, since this part is not the main concern of the present invention, a detailed description thereof will be omitted.

In addition, the injection part 300 includes an injection lance 310, which is a kind of pipe having a sharp bottom, and a plurality of injection holes 320 are formed over a predetermined length from the bottom.

The injection hole 320 is formed radially, one end of the distribution pipe 220 is connected to the upper end of the injection lance 310.

In addition, the injection lance 310 is driven in a predetermined depth and kept in the embedded state.

In addition, the injection lance 310 used for a predetermined time by hitting the landfill is again taken out and reused after being driven to the next stabilization place in the landfill.

The monitoring method of the present invention applied to a system capable of pre-stabilizing a landfill by supplying water or a chemical liquid through a water supply unit having such a configuration is as follows.

In addition, as described above, the present invention is not limited to the water supply unit having the above-described structure. That is, the concept that the monitoring method according to the present invention is not necessarily to use only the water supply unit, but can be applied to all the various types of water supply type landfill stabilization method known to date, Figure 1 is only the most preferred example It is just described.

In the monitoring method according to the present invention, as shown in FIG. 2, an air and water (including chemical) injection step S100 is first performed.

The air and moisture injecting step (S100) is preferably a form that can be supplied to the far distance by supplying and injecting the water blown to the air blown by using the water supply unit exemplified above.

Of course, there is no need to be limited to this form, and may be a conventional method of injecting air and water.

When the air and water are injected, the landfill is changed into an aerobic or aerobic state to accelerate the activation of microorganisms, thereby promoting the decomposition of landfill waste.

Subsequently, the landfill primary monitoring step S110 is performed.

The landfill primary monitoring step (S110) is derived by promoting waste decomposition of aerobic microorganisms by air and moisture or chemicals injected in the air and water injection step (S100) using any one of the above-described units. Various factors (temperature, methane, carbon dioxide, heat, etc.) are detected to determine whether stabilization has been reached.

In this case, the landfill primary monitoring step (S110) is performed at the same time throughout the landfill is difficult because the landfill area is large in fact, it is preferable to perform the partial division by a predetermined area.

In this way, while performing the landfill primary monitoring, a stabilization check step (S120) of reading whether stabilization is completed is performed. If the stabilization is completed as a result of reading through this step (S120), the aerosol-type water or drug supply is stopped. Air injection drying step (S130) for drying only the landfill by injecting only air is performed.

In addition, if the read result is that the stabilization has not yet been completed, the feedback is fed back to the air and water injection step (S100) to continuously perform the air and water injection, and monitoring is repeatedly performed to read whether the stabilization is performed.

On the other hand, since the air injection drying step (S130) is a forced supply method through the blower, the air supplied is due to the water injected into the landfill because the temperature (up to 80 ° C in summer) is relatively higher than the air in the atmosphere As the moisture content of the waste water with higher moisture content decreases, it is accompanied by a drying action.

During this process, the landfill secondary monitoring step S140 is performed.

The landfill secondary monitoring step (S140) is a step of checking whether the drying standard is reached by inspecting in the same manner as the landfill primary monitoring step (S110).

After the step (S140), a drying check step (S150) is performed to check whether the drying is complete. If the result of the check does not reach a dry state, the air injection drying step (S130) is repeated to repeat a subsequent step, and the dry state. If so, it stops the air injection and ends the process.

As described above, the monitoring method according to the present invention does not merely supply air and moisture to the waste to promote the decomposition rate of the landfill waste, but the pre-stabilization and At the same time, it enables early drying to provide the advantages of maximizing the convenience and efficiency of subsequent excavation and screening operations, and also provides the advantages of systematic and zonal management, reducing treatment costs and maximizing treatment efficiency.

100: supply unit 110: blower
120: supply pipe 130: aerosol generator
140: discharge pipe 150: on-off valve
200: distributor 210: distributor
220: distribution pipe 300: injection portion
310: injection lance 320: injection hole

Claims (5)

Air and water injection step (S100) to promote the decomposition by converting the waste in the landfill waste into aerobic state by supplying water or chemical liquid in the form of an aerosol of 5-10 ㎛ size to the landfill waste to the aerobic state;
A landfill primary monitoring step (S110) of photographing and confirming a heat distribution state generated by decomposition of landfill waste by aerobic microorganisms after an air and water injection step (S100) with an infrared camera;
A stabilization check step (S120) of reading whether the stabilization criteria has been reached while monitoring the landfill primary monitoring step (S110);
As a result, if the stabilization did not reach the air and moisture injection step (S100) to repeat the subsequent steps, if the stabilization is reached, the injection of the air injection drying step to stop the water injection and supply only air to dry the landfill (S130) ;
A landfill secondary monitoring step (S140) of reading and confirming an image taken by an infrared camera to determine whether drying is performed after the air injection drying step (S130);
If the landfill secondary monitoring step (S140) to confirm whether the drying is complete, and if the drying standard has not been reached, return to the air injection drying step (S130) and repeat the subsequent steps, if the drying standard is reached, stop the air injection and the process Drying confirmation step (S150) to terminate; Monitoring method for prefilling the landfill, characterized in that consisting of. delete delete delete delete

Images