• 한국건설순환자원학회지
• /
• 제16권3호
• /
• pp.12-20
• /
• 2021

• 한국환경보건학회지
• /
• 제35권6호
• /
• pp.526-531
• /
• 2009

Waste generation was generally expected to steadily rise due to a rapid increase in population and economic growth. However, regulations on disposable goods and a volume-based waste fee system have led to a gradual reduction in the amount of waste. In the case of food waste, separation of food waste from other waste has been put in place since direct landfilling was banned in January 2005. The predicted generation amounts of food waste and wastewater in the model city were 54 ton/d and 127.3 ton/d by year 2020, respectively. However, appropriate treatment technologies for food waste and wastewater discharged from food waste treatment processes are yet to be established. In this study, the food waste and wastewater discharged from food waste treatment process in the model city were characterized by literal and field investigation.

• 방사성폐기물학회지
• /
• 제17권2호
• /
• pp.203-212
• /
• 2019

처분 부적합 폐기물이란 원전운영이나 해체 시 처리, 고화 및 포장이 요구되는 방사성폐기물 등을 일컬으며, 대표적으로 분산 특성을 갖는 입자성 방사성폐기물을 예로 들 수가 있다. 이들 폐기물에는 원전 운영과정에서 발생되는 농축폐액의 건조분말, 슬러리 및 슬러지, 향후 원전 해체과정에서 발생되는 온갖 분말 상태의 폐기물(콘크리트 파쇄물, 제염 슬러지 등), 그리고 제염이 용이치 못한 미세 크기의 방사능오염 토양 등이 있다. 입자성 폐기물을 기존의 고화방식으로 처리할 경우에는 최종 폐기물의 부피가 증가하는 단점을 갖게 되어 처분 비용의 증가 및 처분장의 수용성을 감소하는 결과를 야기할 수가 있다. 따라서 이들 문제를 해결하고자 본 연구에서는 최종 폐기물 부피의 감용화를 위해 롤 압축 기술을 이용하여 분말의 펠렛화 연구를 수행하였다.

• 상하수도학회지
• /
• 제32권3호
• /
• pp.269-277
• /
• 2018

Burials for the rapid disposal of carcasses have diverse and profound effects on the rural living condition, natural environment, and local economy throughout construction, management and final destruction of burials. In this study, possible residue excavated from standard burials, storage using FRP (Fiberglass Reinforced Plastic) tanks, and microbial-treated burials are characterized as carcasses, contaminated soil by leachate, and wasted plastic film. Treatment technologies for volume reduction of the residue including composting, rendering, and thermal hydrolysis were investigated. If the solid and liquid residues generated during volume reduction treatment are directly transferred to the environmental facilities, it may cause disorder due to high concentrations of organics, antibiotics, and lipid. Benefits and drawbacks of composting as a volume reduction techniques are extensively investigated. We also discussed that proper treatment of excavated soils and the reusing the treated soil as agricultural purpose. For the protection of public health and worker's hygiene, treatment criteria including produced residue qualities, and quality standards for the treated soil as agricultural use are required. In addition, Scientific manual for the proper treatment of residues is required. It is necessary to consider the establishment of a pretreatment facility to the occurrence of large-scale residue treatment.

• 한국물환경학회지
• /
• 제21권1호
• /
• pp.34-39
• /
• 2005

The performance of elutriated acid fermentation with slurry-type piggery waste was investigated, especially to evaluate the effects of temperature and pre-treatment. In the first phase, the acid elutriation reactor with piggery waste after centrifugation operated at both mesophilic and thermophilic conditions to evaluate the effect of temperature. Solubilization yield($gVFAs/gSCOD_{prod.}$) and acidification rate($gVFAs/gSCOD_{prod.}$) in the thermophilic digestion were 0.45 and 0.55, which were higher than those of the mesophilic digestion, 0.25 and 0.45. In addition, the acid elutriation reactor at thermophilic temperature is more effective in removing e-coli. In the second phase, the acid elutriation reactor was fed with piggery waste before centrifugation. With piggery wastes before centrifugation, the solubilization yield and the acidificaton rate were 0.40 and 0.80, respectively, which were higher than the rates using piggery waste after centrifugation at both mesophilic and thermophilic conditions. The higher sludge volume reduction of 80% benefits sludge management. Furthermore, economical advantages can be achieved by removing the pre-treatment process, such as centrifugation. Consequently, the treatment with piggery waste before centrifugation proved to be effective. Also, the optimum temperature condition was estimated at mesophilic or thermophilic conditions, considering solubilization yields and acidification rates, though the system should be heated.

• 전기학회논문지
• /
• 제65권3호
• /
• pp.499-503
• /
• 2016

For safety and economy reasons, hazardous waste including radioactive waste is desired to be converted into stable waste forms with a maximum volume reduction. High temperature melting technology using a plasma torch system can effectively treat even the non-flammable waste as desired. By far, one of the most difficult process for melting the non-flammable waste is a tapping of melts because the melting point of a residual slag in the tapping hole is high and because the viscosity of the melt increases sharply when tapping out. In case of a stationary furnace with a slant tapping port on the side of furnace, a certain amount of melts is left in the tapping hole after tapping out. Because of this, at every end of a melting cycle, the tapping hole needs to be opened by tapping device. The developed tapping device of melts based on both a guide electrode and auxiliary electrode is adequate for the application to discharge of melts except that the consumption of the guide electrode is somewhat faster than expected. Melt is collected in the water cooled vessel.

• 한국방사성폐기물학회:학술대회논문집
• /
• 한국방사성폐기물학회 2003년도 가을 학술논문집
• /
• pp.32-37
• /
• 2003

한국원자력연구소에서 약 4,500드럼 규모의 토양폐기물을 임시로 보관하고 있다. 이를 안전하게 처리하기 위한 고화기술 개발이 필요함에 따라 시멘트와 폴리머를 선정하여 시험을 수행하였다. 이를 위해 토양폐기물에 시멘트와 폴리머를 적절히 혼합하여 고화시편을 제조하였으며, 저장에 따른 처분기준 만족여부를 평가하기 위하여 압축강도시험과 침출시험을 수행하였다. 폐기물함량이 40%인 시멘트고화체와 65%인 폴리머고화체의 압축강도가 약 5,300psi로서 유사하였으며, 침출지수는 11 이상으로서 모든 시편에서 기준치를 만족하였다. 고화과정의 균질한 혼합여부와 시편의 다짐상태가 고화체의 건전성에 큰 영향을 미치는 것으로 확인되었다. 감용효과는 폴리머고화체가 시멘트고화체에 비해 20% 정도 우수한 것으로 평가되었다.

• 에너지공학
• /
• 제26권4호
• /
• pp.35-44
• /
• 2017

Disposal of municipal solid waste has become a major problem in many countries around the world. As landfill space for the disposal of ash from Municipal Solid Waste Incineration (MSWI) becomes scarce, numerous reports and researches address the various environmental issues about the municipal solid waste incineration waste management and other particulate matters with the range of 10 ~ 2.5. Although in many developing and industrialization countries landfill with the disposal of municipal solid waste, open incineration has become a common practice. Large municipal waste incinerators are major industrial facilities and have the potential to be significant sources of environmental pollution. Despite the significant volume reduction from incineration, waste recycling is important to ensuring the future welfare of mankind. The main goal of the present work is the physical and chemical characterization of the local incineration bottom ash towards its eventual re-utilization. In this paper, we reported the studies on physical and chemical characteristics of municipal solid waste incineration (MSWI) fly ash and bottom ash containing particulate matter whose particulate sizes are lower than $PM_{10}$, $PM_{2.5}$ and heavy metal were investigated.

• Asian-Australasian Journal of Animal Sciences
• /
• 제12권4호
• /
• pp.633-641
• /
• 1999

Reaction by neighbours to odours is increasingly affecting operations of existing animal farming operations and may adversely constrain the further development of the animal production industry in some parts of Australia. It is critical that the scale of such odour impact on the rural-urban interface be estimated to provide useful information both for environmental protection and animal farming operations. Furthermore, the information can be used to modify odour reduction strategies as economic conditions change. The Centre for Water and Waste Technology at The University of New South Wales has developed a comprehensive set of odour control techniques in the course of its research and development effort over the past eight years. Techniques have been developed for odour sampling at point, area and volume sources, monitoring environmental parameters such as ventilation rate, shed temperature, shed humidity, litter water content and ambient meteorological condition, olfactometry and odour dispersion modelling. The work has paved the way for the establishment of odour reduction strategies based on best environmental management practice and advanced odour abatement technologies.

• 한국인터넷방송통신학회논문지
• /
• 제22권6호
• /
• pp.51-56
• /
• 2022

산업화의 발전으로 음식물 및 쓰레기 배출량이 급격히 증가하고 있다. 이에 정부도 심각성을 인지하고 이를 줄이고자 다방면으로 노력을 하고 있다. 그 일환으로 음식물 종량제을 도입을 하였고 도입 초기 여러 시행착오가 있었지만 20 ~ 30%의 감량 효과를 보여주고 있다. 이러한 실적은 음식물 종량제가 정착이 되고 있음을 암시하고 있다.하지만 1차 수거에서 2차 수거과정을 통해 집하장으로 모여서 자원 순환을 과정에서 이물질로 인한 폐해가 발생하고 있다. 이에 본 연구에서는 이러한 문제점을 근본적으로 해결하고자 인공지능을 적용하여 개선하고자 한다. 음식물쓰레기 특성상 많은 이미지를 구하는데는 한계가 있어 CNN을 기반으로 한 여러 모델을 비교하여 이를 이상 데이터 분류 즉, CNN 기반 모델들에 여러 유형의 이물질에 대한 학습을 시킨 후 그 중 정확도가 놓은 모델을 적용하여 설비 보호와 이물질 구분을 위해 투입되는 인력 등 유지보수에 대한 개선책을 마련하고자 한다.