• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2003년도 추계학술대회 논문집
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• pp.349-350
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• 2003

악취의 배출원은 제지공장, 정유공장, 화학공장 등과 같이 다양한 산업시설과 축사, 음식물 처리시설, 하ㆍ폐수처리장, 분뇨처리장, 생활폐기물 매립장 등의 생활악취시설로 구분할 수 있다. 산업시설의 경우, 악취배출시설에 대한 감시와 관리가 강화되었으나, 생활악취 배출시설의 경우 생활 주변에 광범위하게 자리 잡고 있어 효율적인 악취관리가 이루어지고 있지 않다. 악취 민원이 사회적 문제가 되고 있는 생활폐기물 매립장의 경우 차폐시설을 설치할 수 없어, 지형적인 영향과 기상조건 및 시간에 따라 변화하는 악취의 발생 특성까지 고려해야 하므로 관리가 더욱 어렵다. (중략)

• 한국환경보건학회지
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• 제18권1호
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• pp.63-68
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• 1992

This study was performed to investigate the seasonal variation of the composition of domestic solid wastes and the characteristics of the leachate sampled in In-Cheon sanitary landfill site. The results were as follows 1. Combustible part was larger than incombustible part of the domestic solid wastes in spring and sumer. 2. The food waste was major source of solid wastes in In-Cheon city as 36.5%, and its variation by seasons was negligible. 3. BOD of the leachate was in the range of 853~7, 350mg/l, and fluctuated by seasons. 4. The mean of COD$_{cr}$ Was 5, 044mg/l, the mean of COD$_{Mn}$ was 2, 212mg/l. Namely, the method by $K_{2}Cr_{2}O_{7}$ was more sensitive than the method by KMnO$_{4}$. 5. TOC was in the range of 773~3, 958mg/l, it was lower than BOD.

• 환경영향평가
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• 제6권2호
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• pp.137-152
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• 1997

The siting process of municipal solid waste treatment facility consists of a structured set of policies that guide the implementation of waste management goals. The main problems of siting process are the social and political context or the community opposition. During the past, the traditional siting process has been obsolete in most pans of the country, so public officials and researchers have tried to experiment with new policies and procedures. A number of controversial issues offer insight into the factors that are related to the local residents opposition to new waste treatment facilities. The purpose of this case study focused on the establishment of criteria in the site selection of waste treatment facilities which can carry out resources recovery. incineration and landfill simultaneously. That is to say. the main points are to make concrete the quantification standards of assignment and take an objective allotment scale according to the assessment factors. The summarized results are as follows; 1. To promote the site selection based on the guideline such as rational. objective and due process of law, it is desirable to inform the local residents the methods of assessment in advance. 2. Totally 20 factors for the site selection are divided into 3 categories such as living environment characteristics, technological location characteristics and socio-economic factors. And the supposed magnitude of weight in all items are equally applied. 3. In regard to 20 assessment factors, the allotment of point is distributed by the specific location characteristics. Namely to make the assessment easily, each factors are set the scale from 1 to 5 points en masse along the data which are acquired in the region.

• 태양에너지
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• 제18권3호
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• pp.197-203
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• 1998

A 5 ton/day pilot scale two-phase anaerobic digester was constructed and tasted to treat Korean food wastes in Anyang city. The process was developed based on 3 years of lab-scale experimental results on am optimim treatment method for the recovery of biogas and humus. Problems related to food waste are ever Increasing quantity among municipal solid wastes(MSW) and high moisture and salt contents. Thus our food waste produces large amounts of leachate and bed odor in landfill sites which are being exhausted. The easily degradable presorted food waste was efficiently treated in the two-phase anaerobic digestion process. The waste contained in plastic bags was shredded and then screened for the removal of inert material such as fabrics and plastics, and subsequently put into the two-stage reactors. Heavy and light inerts such as bones, shells, spoons and plastic pieces were again removed by gravity differences. The residual organic component was effectively hydrolyzed and acidified in the first reactor with 5 days space time at pH of about 6.5. The second, methanization reactor part of which is filled with anaerobic fillters, converted the acids into methane with pH between 7.4 to 7.8. The space time for the second reactor was 15 days. The effluent from the second reactor was recycled to the first reactor to provide alkalinities. The process showed stable steady state operation with the maximum organic rate of 7.9 $kgVS/m^3day$ and the volatile solid reduction efficiency of about 70%. The total of 3.6 tons presorted MSW containing 2.9 tons of food organic was treated to produce about $230m^3$ of biogas with 70% of methane and 80kg humus. This process is extended to full scale treating 15 tons of food waste a day in Euiwang city and the produced biogas is utilized for the heating/cooling of adjacent buildings.

• 한국환경과학회지
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• 제25권2호
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• pp.239-246
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• 2016

This study aims to analyze region-specific trends in changing greenhouse gas emissions in incineration plants of local government where waste heat generated during incineration are reused for the recent five years (2009 to 2013). The greenhouse gas generated from the incineration plants is largely $CO_2$ with a small amount of $CH_4$ and $N_2O$. Most of the incineration plants operated by local government produce steam with waste heat generated from incineration to produce electricity or reuse it for hot water/heating and resident convenience. And steam in some industrial complexes is supplied to companies who require it for obtaining resources for local government or incineration plants. All incineration plants, research targets of this study, are using LNG or diesel fuel as auxiliary fuel for incinerating wastes and some of the facilities are using LFG(Landfill Gas). The calculation of greenhouse gas generated during waste incineration was according to the Local Government's Greenhouse Emissions Calculation Guideline. As a result of calculation, the total amount of greenhouse gas released from all incineration plants for five years was about $3,174,000tCO_2eq$. To look at it by year, the biggest amount was about $877,000tCO_2eq$ in 2013. To look at it by region, Gyeonggido showed the biggest amount (about $163,000tCO_2eq$ annually) and the greenhouse gas emissions per capita was the highest in Ulsan Metropolitan City(about $154kCO_2eq$ annually). As a result of greenhouse gas emissions calculation, some incineration plants showed more emissions by heat recovery than by incineration, which rather reduced the total amount of greenhouse gas emissions. For more accurate calculation of greenhouse gas emissions in the future, input data management system needs to be improved.

• 환경영향평가
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• 제18권5호
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• pp.257-270
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• 2009

The central government in Korea has pursued a policy to privatize municipal solid waste treatment facilities in order to enhance the effectiveness of public financial management in recent years. To understand the intentions of local governments on this policy, the survey with questionnaires on 37 out of 256 local governments was made in October, 2007. The results were analyzed and compared in 6 classified policy areas. The results showed that local government had enough financial status to operate the facilities with proper services and had the opinion with positive management in finance with increasing rate of prospective views. Among the facilities operated by local governments, the satisfaction levels for landfill(46.2%) and incineration(40.0%) were relatively higher. However those for recycling and food waste resource facilities were not satisfied with showing lower rate of satisfaction. The priority of privatization in consideration among them were following in order of food waste resource plants(76.2%), incinerators(63.6%), and recycling facilities(53.9%) and the most considerable reason to privatize them was due to resolve financial problems(59.7%). They thought and expected that the privatization would provide cost reduction effects in local governments and also be easier to achieve the environmental goals. To enhance such privatization, expanding more incentives by central government would be essential as shown in the investigation of this survey.

• Environmental Engineering Research
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• 제19권3호
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• pp.261-268
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• 2014

Leachate quality and methane emission from pilot-scale lysimeters operated under semi-aerobic and anaerobic conditions were monitored for 650 days. Two semi-aerobic lysimeters were filled with un-compacted and compacted municipal solid wastes whereas two anaerobic lysimeters containing compacted wastes were operated with leachate storage at 50% and 100% of waste height, respectively. Despite having high moisture in wastes and operating under tropical rainfall events, leachate stabilization in semi-aerobic lysimeters took place much faster resulting in BOD reduction by 90% within 60 days, significantly shorter than 180-210 days observed in anaerobic lysimeters. Nitrogen concentration in leachate from semi-aerobic lysimeter could be reduced by 90%. In term of gas emission, semi-aerobic lysimeter with un-compacted wastes had much lower methane emission rate of $2.8g/m^2/day$ compare to anaerobic lysimeters ($62.6g/m^2/day$) through seasonal fluctuation was observed. Nevertheless, semi-aerobic lysimeter with waste compaction has similar performance to anaerobic lysimeter.

• 한국지하수토양환경학회지:지하수토양환경
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• 제12권2호
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• pp.55-64
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• 2007

생활 폐기물 매립장 침출수에 의해 오염된 지하수에 포함되어 있는 유기산($C_1-C_6$ aliphatic carboxylic acids)들의 정량 분석을 위해서 짧은 분석시간 안에 무기 음이온 뿐만 아니라 유기산까지 정량이 가능한 ion-exchange chromatography를 이용하여 침출수에 용존되어 있는 유기산을 정성 정량하였고, 검출된 유기산의 특성을 평가하였다. 분석 과정에서 $Cl^$, $Br^-$ 등의 halide 이온들의 유기산에 대한 피크 간섭을 줄이기 위해서 이들을 제거하는 전처리를 시료 주입 전에 적용하였다. 음이온 분석과 동일한 분석조건에서 음이온의 간섭을 최소화 하면서 정량이 가능한 유기산들을 선별하였고, 이들 유기산 중에서 음이온의 간섭을 받지 않는 fomate, acetate, propionate, pyruvate, succinate, oxalate에 대해서 정량 분석을 실시하였다. 본 실험에 사용된 유기산의 linear dynamic range는 0.5 mg/L에서부터 20 mg/L까지로 결정하였다. 이 분석법을 쓰레기 매립지 침출수와 주변 지하수에 대해 용존된 유기산과 무기 이온의 정량에 적용하여 높은 농도의 pyruvate와 낮은 수준의 formate와 acetate가 검출되었다. 지하수의 pyruvate 농도는 $Cl^-$, $HCO_3^-$ 농도와 높은 상관성을 보이고, 매립지에서 멀어질수록 농도가 감소하여, pyruvate는 매립지 침출수로부터 유래되었다고 추정되었다.

• 유기물자원화
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• 제16권3호
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• pp.65-74
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• 2008

본 연구에서는 서로다른 4지역의 도시 생활 쓰레기의 성상 및 물리 화학적 조성을 조사 하였다. 생활 쓰레기 연료화시설 설치 및 자료확보 차원 매립장 관리차원에서 매우 필요한 연구이다. 평균 밀도는 $79{\sim}199.8kg/m^3$ 범위내의 결과를 얻었다. 생활 쓰레기는 8.87%의 음식물류, 38.8%의 종이류, 34.12%의 플라스틱류 및 비닐류, 7.16%의 섬유류, 0.96%의 목재류 1.3%의 고무 및 가죽류 등으로 구성되어 있다. 생활쓰레기의 대부분은 음식물, 종이류, 플라스틱류 등으로 이루어져 있으며 94% 정도가 가연 성분이다. 삼성분 분석에서는 17.38%의 수분 및 69.03%의 가연분 그리고 6.24%의 회분으로 이루어져 있다. 원소분석결과는 탄소 산소 수소 순으로 이루어져 있다. 생활쓰레기의 저위 발열량은 2973.8kcal/kg 이며 고위 발열량은 5209.94 kcal/kg 결과를 얻었다.

• 대한토목학회논문집
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• 제30권1C호
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• pp.17-25
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• 2010

전기영동기술은 사용중인 폐기물 매립지(MSW) 지오멤브레인 차수층의 누출 복원을 위한 새로운 기술로서 음으로 대전된 점토입자는 동전기(Electrokinetic) 현상에 의해 누출이 발생되는 차수층까지 이동되고, 누출구 주변에 침출수의 외부유출 방지를 위한 점토 케이크를 형성한다. 본 연구에서는 3차원 누출구 모사실험을 수행하여 전기영동기술의 현장 적용성과 1차원 전기영동 실험을 통해 도출된 최적 인자들의 적절성을 평가하였다. 결과적으로 누출구의 반경이 증대되거나 또는 양전극간의 거리가 가까울수록 누출구 근처에서 형성된 점토 케이크의 크기(두께 및 폭)는 증가하였다.