• Journal of the Korea Organic Resources Recycling Association
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• v.26 no.1
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• pp.5-12
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• 2018

As many local governments have faced increasing conflicts on landfill use and the time of end use, it is difficult to provide an alternative landfill or conclude a consensus of lifespan extension for the existing landfill site. Therefore, the purpose of this study is to contribute improving of the landfill capacity by calculating the resource recovery potentials of landfilled waste previously and in the future by landfill mining. For this, rate of volume increase, weight ratio, and apparent density were adopted as major parameters and their values were calculated through previous cases. The rate of volume increase was calculated to 1.42 by averaging previous cases of three areas. The average weight ratio of soil matter was 45.6% by calculating for the three areas. For the combustible waste and incombustible waste, statistical data can be used. The apparent densities were divided by combustible waste, incombustible waste, and soil matter using an average of two areas value, i.e., $0.35ton/m^3$, $1.40ton/m^3$ and $1.58ton/m^3$. We analyzed the resource recovery potential of Cheongju landfill by using the estimated parameters. The additional landfill capacity was 45% of the existing landfill capacity by recovering landfilled waste by landfill mining. In addition, it is analyzed that the lifespan is extended to 20 years, if the combustible waste of new inputting waste is sorted and combusted for energy recovery and incineration ash, incombustible waste, and soil matter are only reclaimed into the existing Cheongju landfill. It is expected that the methodology and parameters of this study will be used as basic data when resource recovery potential is analyzed for another case study of landfill mining.

• Journal of environmental and Sanitary engineering
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• v.14 no.4
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• pp.29-34
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• 1999

1.The domestic waste generated in Iksan city was 177 tons a day last year. 27 tons of that were recycled daily. Due to increased awareness the recycling rate also increased. 2. It is preferred to get continuous publicity and to enforce the program steadily to activate exchange centers and places like a flea market for reusable things, which will lead to increase the life-span of the current designated landfill site. 3. Because burying food waste in underground will be prohibited from year 2005, the reutilization of food waste by feeding domestic animals like ducks and making artificial fertilizer are preferred. 4. The case of Iksan city is expected to be a model to other cities by establishing a display room to accommodate its detail work demonstration, displaying modeled utilization items and exchange center, incinerator, duck ranch, lawn ground, etc. for making a city as an environmental preservation city model.

• Journal of Korean Society of Environmental Engineers
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• v.32 no.10
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• pp.942-948
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• 2010

To predict the potential reduction of $CH_4$ by recovering several types of wastes as of reusable energy sources like RDF, the $CH_4$ emission for each type of waste from Landfill Site 3 of SUDOKWON Landfill was estimated for the period of 2017 to 2024. Without any recovering effort on types of wastes being disposed of at the Landfill, there are producing a total of $526{\times}10^6\;Nm^3$ of $CH_4$; municipal waste of $337{\times}10^6\;Nm^3$, construction waste of $178{\times}10^6\;Nm^3$, and facility waste of $11{\times}10^6\;Nm^3$. It composed of 41.5% to that observed from 2002 to 2009. With properly retrieved by MT(Mechanical Treatment), it released a total of $158{\times}10^6\;Nm^3$ $CH_4$; $127{\times}10^6\;Nm^3$, $28{\times}10^6\;Nm^3$, and $4{\times}10^6\;Nm^3$, respectively. Additionally, when biologically degradable residues can be fully treated by MBT (Mechanical & Biological Treatment) system, the total amount of $CH_4$ emitted from the site will be lowered down as low as $115{\times}10^6\;Nm^3$, which is comparably lower showing only 21.8% to that for without any energy recovery practice. Futhermore, it is far less showing 9.1% to that obtained from 2002 to 2009. It can be decided that predictable amount of $CH_4$ emission reduced could be successfully accomplished and enhanced through ways of energy recovery efforts such as further scale adjustment of LFG treatment capacity in association with currently implemented practices in the landfill site.