• 제목, 요약, 키워드: municipal solid waste

검색결과 273건 처리시간 0.047초

쓰레기 소각재 용융슬래그 미분말을 혼입한 모르타르의 압축강도 특성에 대한 연구 (An Study on Compressive Strength Properties of Mortar with Municipal Solid Waste Incineration Ash Melted Slag Powder)

  • 이용무;김영수
    • 한국건축시공학회지
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    • v.16 no.1
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    • pp.53-58
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    • 2016
  • 본 연구는 쓰레기 소각재 용융슬래그 미분말을 혼화재료로 사용하기 위한 연구로 소각재 용융슬래그 미분말을 혼입한 모르타르에 대한 연구를 수행한 것이다. 쓰레기 소각재 용융슬래그 미분말의 혼입율을 10, 20, 30, 40, 50%로 다양하게 한 후 굳지 않은 모르타르의 플로 특성과 재령 3, 7, 14, 28, 56일의 압축강도를 평가하였다. 실험결과 쓰레기 소각재 용융슬래그 미분말의 혼입율이 증가할수록 유동성이 증가하였고, 3일, 7일의 압축강도는 점진적으로 감소하였으나, 재령 28, 56일 압축강도는 증가하는 것을 알 수 있었다.

생활폐기물의 재활용과 에너지화에 따른 온실가스 감축량 산정 (Estimation of Greenhouse Gas Reduction by Resource and Energy Recovery of Municipal Solid Waste (MSW))

  • 권유리;장윤;장용철
    • 한국폐기물자원순환학회지
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    • v.35 no.6
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    • pp.525-532
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    • 2018
  • This study examined the potentials for greenhouse gas reduction by material recovery and energy recovery from municipal solid waste between 2017 and 2026 in Daejeon Metropolitan City (DMC), which is trying to establish a material-cycle society by constructing a waste-to-energy town by 2018. The town consists of energy recovery facilities such as a mechanical treatment facility for fluff-type solid refuse fuel (SRF) with a power generation plant and anaerobic digestion of food waste for biogas recovery. Such recycling and waste-to-energy facilities will not only reduce GHGs, but will also substitute raw materials for energy consumption. The emissions and reduction rate of GHGs from MSW management options were calculated by the IPCC guideline and EU Prognos method. This study found that in DMC, the decrease of the amount of MSW landfilled and the increase of recycling and waste-to-energy flow reduced GHGs emissions from $167,332tonCO_2\;eq/yr$ in 2017 to $123,123tonCO_2\;eq/yr$ in 2026. Material recycling had the highest rate of GHG reduction ($-228,561tonCO_2\;eq/yr$ in 2026), followed by the solid refuse fuels ($-29,146tonCO_2\;eq/yr$ in 2026) and biogas treatment of food waste ($-3,421tonCO_2\;eq/yr$ in 2026). This study also shows that net GHG emission was found to be $-30,505tonCO_2\;eq$ in 2017 and $-105,428tonCO_2\;eq$, indicating a great and positive impact on future $CO_2$ emission. Improved MSW management with increased recycling and energy recovery of material waste streams can positively contribute to GHGs reduction and energy savings. The results of this study would help waste management decision-makers clarify the effectiveness of recycling MSW, and their corresponding energy recovery potentials, as well as to understand GHG reduction by the conversion.

Prediction of greenhouse gas emission from municipal solid waste for South Korea

  • Popli, Kanchan;Lim, Jeejae;Kim, Hyeon Kyeong;Kim, Young Min;Tuu, Nguyen Thanh;Kim, Seungdo
    • Environmental Engineering Research
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    • v.25 no.4
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    • pp.462-469
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    • 2020
  • This study is proposing a System Dynamics Model for estimating Greenhouse Gas (GHG) emission from treating Municipal Solid Waste (MSW) in South Korea for years 2000 to 2030. The government of country decided to decrease the total GHG emission from waste sector in 2030 as per Business-as-usual level. In context, four scenarios are generated to predict GHG emission from treating the MSW with three processes i.e., landfill, incineration and recycling. For prior step, MSW generation rate is projected for present and future case using population and waste generation per capita data. It is found that population and total MSW are directly correlated. The total population will increase to 56.27 million and total MSW will be 21.59 million tons in 2030. The methods for estimating GHG emission from landfill, incineration and recycling are adopted from IPCC, 2006 guidelines. The study indicates that Scenario 2 is best to adopt for decreasing the total GHG emission in future where recycling waste is increased to 75% and landfill waste is decreased to 7.6%. Lastly, it is concluded that choosing proper method for treating the MSW in country can result into savings of GHG emission.

쓰레기종량제에 따른 쓰레기의 특성 및 발열양 분석 (The Characteristics and Heating Values Analysis of Municipal Solid Wastes according)

  • 문추조;정순형;이태호
    • 환경위생공학
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    • v.10 no.3
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    • pp.29-34
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    • 1995
  • This study was on the characteristics and heating values analysis of municipal solid wastes according to the volume- rate garbage collection system in Busan. Each waste sample was analyzed to obtain physical composition, proximate analysis, heating value, chemical composition. And the heating value were compared with those of the past waste collection system. The average physical composition of A.P.T. area was food waste 54.0~65.7% , while that of common residence was food waste 57.9~61.2% . The density of solid waste were largely different for site and the highest densities of waste was $399.6kg/m^{3}$ from Market. The low heating value of waste from residence site was 996.9kca1/kg~1, 238.1 kcal/kg which was lower than 1, 000kcal/kg~1, 800kca1/kg of the past wastes. These difference was mainly due to the difference of moisture content and the amount of vegetables.

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수리계획모형을 활용한 대도시 폐기물 관리 시스템의 광역화 운영 계획에 관한 연구 (A Study on the Regionalization of the Municipal Solid Waste Management System Using a Mathematical Programming Model)

  • 김재희;김승권;이용대
    • 경영과학
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    • v.20 no.1
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    • pp.65-76
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    • 2003
  • The increased environmental concerns and the emphasis on recycling are gradually shifting the orientation of municipal solid waste (MSW) management. This paper is designed to evaluate regionalization programs for MSW management system. We developed a mixed intiger network programming (MIP) model to identify environment-friendly, cost-effective expansion plans for regionalization scenarios considered. The MIP model is a dynamic capacity expansion model based on the network flow model that depicts the MSW management cycle. In particular, our model is designed to determine the optimal form of regionalization using binary variables. We apply this model to assess the regionalization program of Seoul Metropolitan City, which includes three scenarios such as 1) districting, 2) regionalization with neighboring self-governing districts, and 3) g1obalization with all districts. We demonstrate how our model can be used to plan the MSW system. The results indicate that optimal regionalization with nearby self-governing districts can eliminate unnecessary landfills and expansions if jurisdictional obstacles are removed.

메탄발효를 위한 도시쓰레기 초고온 가용화 방법의 효율성 검토 (A Study of Biological Hydrolysis Efficiency for Methane Digestion with Municipal Solid Waste)

  • 천지훈
    • 상하수도학회지
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    • v.24 no.5
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    • pp.561-572
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    • 2010
  • The efficiency of biological hydrolysis at $80^{\circ}C$ on municipal solid waste mixed with anaerobic digestion sludge was investigated in 100L batch reactors. The hydrolysis effect was observed within a day, when the hydrolysis reactor used for a pre-treatment reactor for methanogenesis, and the effect was observed during two days, When the reactor used for post-treatment reactor. For both configurations, methane production rate decreased, when hydrolysis was carried out more than a day. Gaseous ammonia in the hydrolysis reactors was successtully removed by the ammonia stripping system. Microbial diversity analysis on the hydrolysis reactors indicated dependency of microbial diversity on the configuration of the hydrolysis reactors. Carbohydrate and lactate degrading microbes dominated in the hydrolysis reactor, when the hydrolysis reactor used for a pre-treatment reactor for methanogenesis, while protein degrading microbes dominated in the post-treatment reactor.

생활 폐기물 수집.수송 관리를 위한 Expert-System 개발 (Development of Expert-System for Municipal Solid Waste Collection and Transportation)

  • 강동구;류돈식;이해승;이찬기
    • 한국방재학회 논문집
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    • v.1 no.1
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    • pp.91-102
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    • 2001
  • 본 연구에서는 체계화되지 못한 중소도시의 쓰레기 수집 수송의 자료를 정리, 현장 조사를 통한 쓰레기 수집 수송 관리를 위한 프로그램을 작성하였다. 대상은 C시로 하였으며, 수집구역을 주택, 아파트, 상가지역으로 한정지어 현장 조사를 실시하였고, 폐기물 관리 프로그램을 작성하였다. 연구 결과는 쓰레기 수집 수송단계의 필요한 인자와 중소도시에 적용 가능한 평균 값을 도출하였고, 중소도시의 쓰레기 수집 수송단계를 체계화하는 단계와 expert system을 구축하였다. 또한, Visual Basic을 이용한 쓰레기 수집 수송 관리 프로그램을 개발하였다. 결과적으로 본 연구로 개발되어진 도시폐기물의 수집 수송 관리 시스템은 다른 지역의 현장 Data를 추가함으로서 광범위하게 이용될 수 있을 것이다.

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생활폐기물 특성 분석 및 소각시설의 CO2 배출량 평가 (Property Analysis of Municipal Solid Waste and Estimation of CO2 Emissions from Waste Incinerators)

  • 김병순;김신도;김창환;이태정
    • 한국대기환경학회지
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    • v.26 no.6
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    • pp.657-665
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    • 2010
  • Carbon dioxide ($CO_2$) is known to be a major greenhouse gas partially emitted from waste combustion facilities. According to the greenhouse gas emission inventory in Korea, the quantity of the gas emitted from waste sector in 2005 represents approximately 2.5 percent of all domestic greenhouse gas emission. Currently, the emission rate of greenhouse gas from the waste sector is relatively constant partly because of both the reduced waste disposal in landfills and the increased amounts of waste materials for recycling. However, the greenhouse gas emission rate in waste sectors is anticipated to continually increase, mainly due to increased incineration of solid waste. The objective of this study was to analyze the property of Municipal Solid Waste (MSW) and estimate $CO_2$ emissions from domestic MSW incineration facilities. The $CO_2$ emission rates obtained from the facilities were surveyed, along with other two methods, including Tier 2a based on 2006 IPCC Guideline default emission factor and Tier 3 based on facility specific value. The $CO_2$ emission rates were calculated by using $CO_2$ concentrations and gas flows measured from the stacks. Other parameters such as waste composition, dry matter content, carbon content, oxidation coefficient of waste were included for the calculation. The $CO_2$ average emission rate by the Tier 2a was 34,545 ton/y, while Tier 3 was 31,066 ton/y. Based on this study, we conclude that Tier 2a was overestimated by 11.2 percent for the $CO_2$ emission observed by Tier 3. Further study is still needed to determine accurate $CO_2$ emission rates from municipal solid waste incineration facilities and other various combustion facilities by obtaining country-specific emission factor, rather than relying on IPCC default emission factor.

도시고형폐기물 소각 비산재의 지반공학적 특성 및 시멘트 안정화에 관한 연구 (The Geotechnical Properties of Municipal Solid Waste Incinerator Fly Ash and Cement Stabilization)

  • 조진우;김지용;한상재;김수삼
    • 한국지반공학회:학술대회논문집
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    • pp.528-535
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    • 2000
  • Solid waste incinerator is expected to become widely used in Korea. The incineration of solid waste produces large quantities of bottom and fly ash, which has been disposed of primary by landfilling. However, as landfills become undesirable other disposal method are being sought. In this study, an experimental research is conducted to determine the geotechnical properties of municipal solid waste incinerator fly ash(MSWIF) in order to evaluate the feasibility of using the material for geotechnical applications. Basic pysicochemical characteristics, moisture-density relationship, strength, permeability, and leaching characteristics are examined. The results of MSWIF are compared to other MSWIF and coal fly ash which are used as construction material. In addition, the effectiveness of cement stabilization is investigated using various mix ratios. The result of stabilized mixes are compared to the unstabilized material. Cement stabilization is found to be very effective in reducing permeability, increasing strength, and immobilizing heavy metals. This results indicate that MSWIF with cement stabilization may be used effectively for geotechnical application.

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폐기물 처리시설에 관한 소도시 시민의 의식 조사 (Citizen's Attitude to Treatment Facilities of Municipal Solid Waste in Small City)

  • 장성호;박진식
    • 환경위생공학
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    • v.14 no.1
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    • pp.70-79
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    • 1999
  • A questionary survey was conducted to investigate citizen's attitude to treatment facilities of municipal solid waste in Miryang during 8. June of 1998 and 22 June of 1988. Collection effiencies was 86.7%, as 260 individuals of the 300 individuals. The survey showed that 43.0% of answers recognized seriousness of problem of the waste treatment and 33.1% of respondents concerned about recycle of organic waste. 40.8% of total answers said that they most hated landfill site among waste treatment facilities, and most citizens wanted as much distant as possible from waste treatment facilities. It was investigated that the greater part of respondents wanted the greatest compensation. About 58% of respondents was opposed to complete waste treatment facilities. 36.2$ among answers wanted establishment of waste treatment facilities in an industrial complex or an industrial area. The majority of respondents was willing to increase recycle rate and recognized seriousness of landfill site security. The majority of citizens do not trust environmental administration of Miryang City and they think that democracy and open of administration need for overcome MINBY.

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