• Coupled systems mechanics
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• 제12권6호
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• pp.531-537
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• 2023

Municipal solid waste landfills are unpredictable bioreactors which in cases of mishandling and bad supervision presents numerous risks. The key to municipal waste landfills is to approach them from the point of prevention of the possible consequences, which means using methods of organized waste disposal, and also utilizing landfill gas, as an unavoidable consequence with disposal of municipal solid waste with a high share of biodegradable organic matter. This paper presents an overview about problems of solid municipal waste management, type and composition of waste, and an overview of waste management condition. Further, the problem of landfill and landfill gasses is described with the calculation models of landfill production, as well as the use of the SWM GHG Calculator and LandGEM software on a specific example of gas production for the central zone at Sarajevo landfill "Smiljevici". Main focus of this thesis is the analysis of potentials of greenhouse gas emission reduction measures from the waste management. Overview of the best available techniques in waste management is presented as well as the methodology used for calculations. Scenarios of greenhouse gas emission reduction in waste management were defined so that emissions were calculated using the appropriate model. In the final section of the paper, its description of the problem of collection and utilization the landfill gas at the sanitary landfill "Smiljevici", and implementation of the system for landfill gas collection and solution suggestion for the gasification and exploitation of gas. Energy, environmental and economic benefits can be accomplished by utilizing municipal solid waste as fuel in industry and energy and moreover by utilizing energy generation from landfill gas, which this thesis emphasizes.

• 한국환경보건학회지
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• 제28권2호
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• pp.99-108
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• 2002

This study was carried out to evaluate the Physicochemical characteristics of mined waste(separated waste and soil) and to predict environmental effect of an old landfill site located at north of Seoul. Municipal solid waster(MSW) had been disposed of at the old landfill site used in this study for about 2 years(1990-1992). The old landfill site selected for this study had accepted mainly municipal solid waste. The landfill-mined waste contained separated waste (40.9%) and soil(59.1%) by wet weight basis. The separated waste consisted of combustible(91.0%) and non-combustible(9.0%). The combustible waste was mainly non-biodegradable plastics. The low heating value of the separated combustible waste, which is calculated by Dulong's equation, was as high as 3,470kcal/kg. According to the Korean Extraction Procedure, separated waste and soil were proved to be not hazardous. The total content of heavy metal in the separated waste and soil met standard of California State, USA. Therefore the separated waste may be relandfilled at a sanitary landfill site and/or burned up at an incinerator, and the separated old soil may be used ad landfill cover-soil at a sanitary landfill site. Water quality of two streams was grade IV, of which water could be used as industrial and agricultural water. The streams near the landfill site might not be contaminated by leachate from the old landfill site. It was estimated that organic matter in the old landfill site would not be actively biodegraded within a short period of time.

• 유기물자원화
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• 제24권4호
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• pp.39-48
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• 2016

본 연구에서는 폐기물매립지 운영자, 관계 공무원 및 지역주민들에게 폐기물매립에 관한 정보 제공은 물론 실시간으로 폐기물매립지의 운영 및 관리를 최적화할 수 있는 매립 정보관리 시스템을 개발하였다. 매립 정보관리 시스템은 두 개의 시스템 (폐기물 매립이력 관리 시스템 및 매립 진척상황 관리 시스템)로 구성되어 있다. 자동화된 RFID / LPR 방식에 의한 고형 폐기물 매립이력 관리 시스템은 폐기물 수거 차량과 반입폐기물의 정보를 관리하며, 또한 폐기물매립지 외각에 설치된 추적 카메라를 이용하여 폐기물의 매립위치 및 매립시간 등의 정보를 3차원으로 DB화하여 향후 매립폐기물의 자원화 및 사후토지 이용 시 필요한 매립이력을 제공할 수 있도록 하였다. 매립진척상황 정보관리 시스템은 레이저 스캐너를 이용하여 실시간으로 매립지 부피 및 용량을 3차원으로 관리하여 매립진척상황을 실시간으로 산정할 수 있도록 하여 향후 매립지 잔여용량 분석을 통한 수요예측이 가능하도록 하였다.

• 환경영향평가
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• 제14권6호
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• pp.365-375
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• 2005

For managing and utilizing a closed municipal solid waste landfill site in environmentally secure conditions, it is necessary to verify the stabilization level of landfill gas(LFG) and waste. For assessing LFG and waste stabilization of an open-dumping municipal solid waste landfill (Salmi Landfill) which is located at the vicinity of Chungju Reservoir which flows into Paldang Reservoir that has been used for Seoul Metropolitan water supplies, the history and the surrounding characteristics of the landfill site were surveyed. In this study, waste and LFG samples obtained from landfill site were physically and chemically analyzed, and then the analysis results were evaluated on the basis of 'The Criteria of Landfill Waste Stabilization(CLWS)' that were promulgated by Korean Ministry of Environment. Based on LFG composition of Salmi landfill, $CH_4$ was as high as 68%. In CLWS regulation, the stabilization criteria of $CH_4$ should be lower than 5%, and the criteria of C/N ratio should also be lower than 1/10. The result showed that C/N ratio of landfilled waste ranged 17.4~24.7. From this results, it was concluded that the LFG and C/N ratio stabilization level of this landfill based on the CLWS were still actively proceeding.

• Environmental Engineering Research
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• 제20권3호
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• pp.268-276
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• 2015

Solid waste production increases due to population and consumption increments. Landfill is the ultimate destination for all kinds of municipal solid waste; and is the most convenient waste disposal method in developing countries. To minimize investment and operational costs and society's opposition towards locating landfills nearby, proper landfill sizing and siting are essential. In this study, solid waste forecasting using Autoregressive Integrating Moving Average (ARIMA) was integrated with government future plans and waste composition to estimate the required landfill area for the state of Selangor, Malaysia. Landfill siting criteria were then prioritized based on expert's preferences. To minimize ambiguity and the uncertainty of the criteria prioritizing process, the expert's preferences were treated using integrated Median Ranked Sample Set (MRSS) and Analytic Hierarchy Process (AHP) models. The results show that the required landfill area is 342 hectares and the environmental criteria are the most important; with a priority equal to 48%.

• 환경영향평가
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• 제15권5호
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• pp.299-308
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• 2006

To utilize a closed municipal solid waste landfill site in environmentally secure conditions, it is necessary to verify the stabilization level of landfill leachate. To assess leachate stabilization of an open-dumping municipal solid waste landfill site (Salmi Landfill) which is located at the vicinity of Chungju Reservoir which flows into Paldang Reservoir utilized as Seoul Metropolitan water supplies, the landfill history and surrounding characteristics of the landfill site were surveyed. In this investigation, waste, leachate, groundwater and surfacewater samples from this landfill were physically and chemically analyzed, and the analysis results were evaluated by 'The Criteria of Landfill Waste Stabilization (CLWS)', 'Discharge Criteria of Landfill Leachate', 'The Criteria of Domestic Use in Groundwater Quality', and 'The Criteria of Domestic Use in Surfacewater Quality' that promulgated by Korean Ministry of Environment. From the analysis results on the Salmi open-dumping landfill, C/N ratio was 18.9 and $BOD/COD_{Cr}$ ratios in leachate were higher than 1/10. Based on the CLWS, this results seemed to imply that the process of leachate stabilization at this landfill was still proceeding.

• 한국환경보건학회지
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• 제15권2호
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• pp.69-73
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• 1989

The objective of this study is to investigate the amount of disposal, the composition of solid wastes and environmental pollution (leachate, ground water) in a solid waste landfill. The results were as follows. 1. The amount of daily disposal in Taejon City is appoximately 1.5kg/c.d with the heat capacities of 2850 - 4200 kcal/kg. 2. The existing leackage treatment plant must be improved, because it has many problems. 3. It is desirable that urban solid wastes should be treated by sanitary landfill, incineration or compost.

• 한국환경과학회지
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• 제17권4호
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• pp.397-403
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• 2008

The purpose of this study is to investigate weighted compaction density according to a leading density in truck, a compaction density of solid waste and composition ratios of solid waste fur calculation of a capacity of the landfill sites. The experiments for calculations of in-place density at landfill site have been conducted in S landfill site at B City. The size of vessel for measuring the compaction density was $1m^3(1m{\times}1m{\times}1m)$. The experiment tests have been carried out methods (1 time for bulldozer and 4 times for compactor) that do contain all of specification at the landfill site. Average of the loading density at the landfill site was $0.264\;ton/m^3$ ($0.113{\sim}0.487\;ton/m^3$). When the loading density for each compositions was compared, the composition of the highest average loading density ($0.474\;ton/m^3$) was miscellaneous wastes. The composition of the lowest average loading density ($0.120 ton/m^3$) was general solid waste. The reported results indicated that the compaction density at the landfill site was $0.538\;ton/m^3$, which was calculated with weighted incoming ratios of compositions. The ranges of the density for each composition were from $0.021\;ton/m^3$ to $0.221\;ton/m^3$. When the compaction density for each composition was compared, the composition with the highest average compaction density ($0.221\;ton/m^3$) was miscellaneous wastes. The composition with the lowest average compaction density ($0.021\;ton/m^3$) was general solid wastes.

• Korean Chemical Engineering Research
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• 제53권4호
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• pp.503-508
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• 2015

The adsorption characteristics of ammonia on MSWI bottom ash were investigated. The effect of the variation of the landfill environmental parameters including pH, anions and organic matter on the adsorption process was discussed. Results showed that the adsorption could be well described by pseudo-second-order kinetics and Langmuir model, with a maximum adsorption capacity of 156.2 mg/g. The optimum adsorption of ammonia was observed when the pH was 6.0. High level of ion and organic matter could restrict the adsorption to a low level. The above results suggested that MSWI bottom ash could affect the migration of ammonia in the landfill, which is related to the variation of the landfill circumstance.

• 유기물자원화
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• 제13권3호
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• pp.63-70
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• 2005

음식물류폐기물의 직매립 금지로 종량제 봉투에 버려지던 상당량의 음식물류가 제외되면서 도시생활폐기물의 조성은 최근 급변하고 있다. 이에 본 연구에서는 2004년~2005년 2년간 3회에 걸쳐 중소규모의 도시 내 10개 지점에서 배출되는 도시생활폐기물을 발생원에서 수거하여 폐기물의 물리화학적 조성을 조사하고, 이로부터 음식물류폐기물의 직매립 금지조치가 폐기물의 성상변화에 미치는 영향을 정리하였다. 음식물류폐기물의 직매립 금지로 생활폐기물 중의 음식물류의 함량은 2004년도 대비 중량기준으로 약 12% 감소하였으며, 겉보기 밀도도 약 25% 감소하였다. 또한 전체 폐기물 중의 수분함량은 32.3%로 2004년도에 비하여 14.1% 감소하였으며, 폐기물의 저위발열량은 직매립 금지 후 약 32% 증가하여 2991.4 kcal/kg의 값을 나타내었다. 매립폐기물에 의한 매립가스 발생량은 연간 가스발생량 기준으로 최대 5%가 감소되어 매립지에서의 환경오염물질 배출량의 저감효과도 일부 예측되었다.