• 한국해양공학회:학술대회논문집
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• 한국해양공학회 2000년도 추계학술대회 논문집
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• pp.96-100
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• 2000

Recently ocean environmental pollution becomes very serious, so each governmental organization slove this problem. As part of the policy, KRISO has investigated distribution condition at ocean waste. Acc\ulcorner we found that combustble waste consists of ropes, fishing nets, and tires. These are, however, highly polyme\ulcorner existing incicerators have many problems to treat these. In this study we want to pyrolyze highly polymerized \ulcorner data for a design of fule production system without second pollution. Through the thermogravimetic experiment characteristics of pyrolysis and obtained some preliminary results.

• 한국농공학회논문집
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• 제54권3호
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• pp.75-80
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• 2012

Gasification is a therm-chemical conversion process to convert various solid fuels into gaseous fuels under limited supply of oxygen in high temperature environment. Considering current availability of biomass resources in this country, the gasification is more attractive than any other technologies in that the process can accept various combustible solid fuels including plastic wastes. Mixed fuels of biomass and polyethylene pellets were used in gasification experiments in this study in order to assess their potential for synthesis gas production. The results showed that higher reaction temperatures were observed in mixed fuel compared to woodchip experiments. In addition, carbon monoxide, hydrogen, and methane concentrations were increased in the synthesis gas. Heating values of the synthesis gas were also higher than those from woodchip gasification. There are hundred thousand tons of agricultural plastic wastes generated in Korea every year. Co-gasification of biomass and agricultural plastic waste would provide affordable gaseous fuels in rural society.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1997년도 추계학술대회 논문집 학회본부
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• pp.357-360
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• 1997

Currently, there is a need for the development of an advanced new technology for Low-and Intermediate-Level Radioactive Waste (LILW) treatment from nuclear power plants. The vitrification and melting technology by the use of the electrical equipments such as induction heater and plasma torch based furnace, along with off-gas treatment are considered as the most promising one of the LILW treatment technology since they can produce a very stable waste forms as well as considerably large volume reduction, which is a world-wide trend to apply for radioactive waste treatment. Korea Electric Power Research Institute(KEPRI) has already completed a feasibility study on LILW treatment and conceptual system design of a demonstration plant to be constructed. For this research, KEPRI selected a cold crucible melter(CCM) for the vitrification of combustible waste, and plasma torch based furnace(PT) for the melting of noncombustible waste, along with off-gas treatment for the volatile radioisotopes such as cesium.

• 방사성폐기물학회지
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• 제2권3호
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• pp.175-180
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• 2004

In order to vitrify the combustible dry active waste (DAW) generated from Korean Nuclear Power Plants, a glass formulation development based on waste composition was performed. A borosilicate glass, DG-2, was formulated to vitrify the DAW in an induction cold crucible melter (CCM). The processability, product performance, and volume reduction effect of the candidate glass were evaluated using a computer code and were measured experimentally in the laboratory and CCM. The glass viscosity and electrical conductivity as the process parameters were in the desired ranges. Start-up and maintaining glass melt of the candidate glass were favorable in the CCM. The product of the glass product such as chemical durability, phase stability, and density was satisfactory. The vitrification process using the candidate glass was also evaluated assuming that it was operated as economically as possible.

• 유기물자원화
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• 제20권1호
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• pp.23-30
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• 2012

본 연구는 향후 최적 소각용량의 산정에 관해 재평가가 요구되고 있는 실정에서 반입되는 폐기물 발생량, 발열량 증가 및 B시 구역별 유동인구 변화 등을 고려하여 소각 사업소의 최적 가용용량을 예측하고, 예측된 가용용량을 기초로 하여 각 소각 사업소 별 처리량 대안에 대해 연구하는 게 목적이다. B시의 과거 인구추이를 바탕으로 인구변화량을 예측한 결과 전체 인구는 감소추세에 있으나, 일부 지역에 따라서는 아파트 단지 증가 등으로 인구 집중 현상이 나타나 현재와 비슷할 것으로 판단된다. 또한 인구예측을 통한 폐기물 발생량 예측 시 인구의 감소에 의한 폐기물 발생량은 감소할 것으로 판단되지만, 총 폐기물 발생량 중 가연성분 발생량은 증가할 것으로 예측되어 가연성 성분 및 소각 처리량은 D 소각 사업소를 제외하고는 적정할 것으로 예측된다. 따라서 현재 D소각 사업소의 소각율은 72.7%로 전국 소각비율 59.1%보다는 높지만 향후 소각량 확보를 위하여 B시의 MBT시설의 잔재폐기물 및 RDF 회수 잔재물 등과의 혼재 소각과 하수슬러지 및 음식물 쓰레기의 혼재소각이 필요하다고 판단되어지며 2015년 이후 D 소각 사업소를 폐쇄한다고 가정하였을 때는 각 소각장과의 거리와 가용할 수 있는 소각장 규모를 파악하여 경제성에서 가장 적합한 연동구역에 운반(연동제)하여 운영하는 방법이 경제적일 것으로 예측된다. 이에 D 소각 사업소의 경우는 새로운 소각시설 설치에 따른 주민불편 및 사회적 피해를 고려하여 폐수처리장 통합연계 시스템 구축에 따라 폐기물과 혼재 처리할 수 있는 장래의 여유 소각을 할 수 있는 시설 확보 측면에서 2020년까지 운영이 필요하고, H나 M 소각 사업소는 적정 소각량이 감소하는 경우 3개 소각시설이 운휴 기간이 없이 운영되기 위해서 2기를 확보하고 단위사업별 1기 단위로 6개월씩 단위 운영 병행제로 하는 관리방안의 구상도 해결방안이라고 판단되어 진다.

• 한국환경보건학회지
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• 제19권4호
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• pp.51-58
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• 1993

The integrated solid waste management for Seoul Metropolitan city can be established on the basis of the following hierarchy of priorities: 1. Efforts for source reduction should be propelled by both government and citizens to achieve the effects of resource conservation. The adequate production and consumption which are environmentally amenable and sustainable can be induced by the reasonable imposition of deposit money for waste treatment to one-time use products. To accomplish source reduction effectively, the induction of legal and institutional regulation of producer and consumer participation is requisite. 2. For resource recovery, wastes generated should be recycled as far as practicable. Community residents are responsible to separate discharge, the authorities concerned have responsibility of separate collection, and recycling industry should be assissted through tax reduction and financing. Resource separation facilities can be constructed at Kimpo Metropolitan landfill site for wastes not separately collected due to some unavoidable circumstances. 3. Garbage should be composted. Garbage is uneconomical for incineration, because it has high moisture content and low calorie, thus there is no reason for the incineration of garbage even though garbage is classified into combustibles. Composting facilities can be located at sites which are not densely populated and easily accessible to transportation, for example, Kimpo Metropolitan landfill site. Compost produced can be managed by the authorities for the use of fertilizer to a green tract of suburban land and farms. 4. Nonhazardous combustible wastes not recyclable can be utilized for thermal recovery at the incinerators which are completely equipped with pollution control devices. According to the trend of local autonomy and the equity principle of local autonomous entities, incineration facilities of minimal capacity required can be constructed at each districts of Seoul Metropolitan city which have organized local assembly. In case of Yangcheon district, the economically combustible waste quantity is about 260 tons/day which exceeds 150 tons/day, the incineration capacity of existing facility. But, from now on, waste quantity can be reduced substantially by the intensive efforts of citizens for source reduction and recycling and the institutional support of administrative organizations. Especially, it is indispensable for the government to constitute institutional and technological bases that can recycle paper and plastics form 43% of waste generated. A good time for constructing of incineration facilities for municipal solid waste can be postponed to the time that pollution control technologies of domestic enterprises are fully developed to satisfy the standards of air pollution prevention, because the life expectancy of Kimpo Metropolitan landfill site is about 25 years. Within this period, institutional improvements and technological advancements can be attained, while the air qual. ity of Seoul Metropolitan city can be ameliorated to the level to afford incineration facilities. 5. For final disposal, incombustibles and ash are landfilled sanitarily at Kimpo Metropolitan landfill site.

• 유기물자원화
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• 제26권1호
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• pp.5-12
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• 2018

최근 지자체에서는 매립지 사용에 관한 갈등과 사용종료 시점을 앞두고 논란이 이는 사례가 늘고 있으며, 대체 매립지 마련이나 기존 매립지의 수명연장 합의를 이끄는데 난항을 겪고 있다. 이에 본 연구는 매립지 정비를 통하여 기 매립된 폐기물과 향후 매립될 폐기물의 순환이용 가능량을 산정하고, 매립지의 용량을 확보하도록 기여하는 데에 그 목적이 있다. 이를 위해 부피증가율, 중량비, 겉보기밀도를 주요 파라미터로 결정하고, 기존 사업 사례를 통해 그 값을 산정하였다. 기존 사업 지역(아산시, 예천군, 안동시)에서의 부피증가율의 평균값은 1.42로 산정되었다. 중량비의 경우 세 지역의 토사류 평균값은 45.6%로 산정되었고, 가연성 폐기물과 불연성 폐기물의 비율은 "전국 폐기물 발생 및 처리 현황" 통계자료를 활용할 수 있도록 산정 방법론을 제시하였다. 겉보기밀도는 두 지역 평균값을 이용하였으며 가연성, 불연성, 토사류별로 각각 0.35톤/$m^3$, 1.40톤/$m^3$, 1.58톤/$m^3$으로 산정되었다. 본 연구에서 산정된 주요 파라미터들과 제시된 방법론을 통해 사례 연구로 청주매립지의 순환이용 가능량을 분석하였다. 기 매립된 폐기물을 정비하여 순환이용함으로써 새로 확보될 매립용량은 기존 매립지 용량 대비 45%에 해당되었다. 또한 매년 반입되는 물량을 선별하여 가연성분은 에너지화하고, 소각재, 불연성 및 토사류만 재매립할 경우 청주시의 매립지 사용연한이 20년 증가되는 것으로 분석되었다. 향후 본 연구에서 구축한 방법론은 특정 매립지를 선정하여 순환이용 하고자 할 때 기초자료로 활용될 수 있을 것으로 기대된다.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2006년도 추계학술대회
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• pp.75-78
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• 2006

With the increasing environmental consideration and stricter regulations waste gasification is considered to be more attractive technology than conventional incineration for energy recovery as well as material recycling. The experiment for combustible waste was performed In the fixed bed gasifier to investigate the gasification behavior with the operating conditions in a 5ton/day fixed bed gasifier The experiments of operation with 10-50 hours were carried out to determine the effects of bed temperature and oxygen/waste rat io on the syngas composition, calorific value and carbon conversion. The calorific values of the produced syngas decreased with an Increase of bed temperature because combust ion reaet ion more act ively happened. The syngas composition of wood waste gasification is CO: 34.4%, $H_2: 10.7%,\;CH_4: 6.0%,\;CO_2: 48.9%$ and that of RPF is CO: 33.9%, $H_2: 26.1%,\;CH_4: 10.7%,\;CO_2: 29.2%$. The average calorific values of produced gas were about $1,933kcal/Nm^3,\;2,863kcal/Nm^3$, respectively

• 신재생에너지
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• 제7권1호
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• pp.29-35
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• 2011

The waste treatment fee and energy production effect of Wonju city RDF plant, the first RDF manufacturing plant in Korea, were investigated in the study. All plant operation data, like total weight of received wastes, produced RDF and separated rejects in processes were fully recorded for mass balance calculation of the plant in 2009. Also all consumed oil and electricity were recorded for energy balance calculation. The results showed that the waste treatment fee not including the RDF sales price of 25,000 won/ton-RDF was 116,573 won/ton-MSW and it went down to 105,298 won when included the RDF price. Produced RDF was 40.2% of total received waste in weight. Three components analysis by mass balance calculation of total received waste showed that Wonju city's MSW was 32.4% of combustible, 37.5% of water and 30.1% of incombustible respectively. Energy effect was found that total amount of produced energy was about 4 times more than that of consumed energy.

• 환경위생공학
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• 제13권3호
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• pp.9-18
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• 1998

An experimental research was conducted to establish primary data for the stabilization assessment of industrial wastes landfill with analysis of waste components and investigation of leachate and gas generation, using three sets of lysimeter as experimental apparatus. Comparing results of lysimeter from data of landfill, it is suggested that lysimeter of this study can be used to accomplish the stabilization assessment of the real landfill site. Moisture content was lower as landfill period was older and combustible component was the highest in lysimeter C. The C/N ratio of waste was 7.4~14.4 and, with the elemental analysis, the theoretical gas generation rate based on the modified Buswell equation was 0.47~0.49 $m^3/kg-dry$ waste in lysimeter C. Considering the C/N ratio of leachate, it is concluded that the addition of carbon source is needed to biodegrade leachate hereafter. Gas generation rate($m^3/kg-dry$ waste) from lysimeter A, B and C was 0.0009, 0.014 and 0.0067, respectively, and different from each other according to the landfill period of wastes. The results in this study show that the biodegradation of microorganism for stabilization of landfill was inhibited and more activated in acidogenic step than in methanogenic of anaerobic degradation.