• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2004.11a
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• pp.200-205
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• 2004

• Clean Technology
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• v.3 no.2
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• pp.28-30
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• 1997

발효 아미노산을 분리하는 기존의 공정인 이온교환법에서 폐액 및 폐수처리에 따른 문제점을 해결하기 위한 새로운 분리공정으로 탈염 전기투석과 Water-splitting Electrodiaysis를 이용한 발효 아미노산의 분리 가능성 및 다양한 cell configuration과 막에 대한 성능 실험을 실시하였다. 실험결과 전기투석에 의해 경도물질을 제거한 후 양이온교환막과 bipolar 막으로 구성된 2-compartment WSED로 효과적으로 발효액에서 아미노산을 분리 할 수 있었으나 1가 양이온에 선택성을 지닌 양이온교환막으로는 아미노산의 분리가 어려움을 알 수 있었다.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2004.06a
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• pp.255-256
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• 2004

청정에너지원인 원자력은 화력연료의 대체에너지원으로 높은 에너지 효율의 중요한 역할을 하고 있다. 그러나 발전시 필연적으로 발생되는 방사성 오염물에 대한 환경적 관심은 점점 고조되고 있는 실정이다. 따라서, 방사성 오염물에 대한 관리 및 처리는 청정원자력으로의 발전을 위해 매우 중요하다. 원자력 발전소내의 주요 방사성 제염 대상물은 오염된 의복, 부품, 장비 등이다. 기존의 화학 및 물리 제염법은 다량의 2차 폐기물을 발생시키는 문제점이 있어 이를 최소화 할 수 있는 방법이 요구되고 있다.(중략)

• Proceedings of the Korea Society for Energy Engineering kosee Conference
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• 1993.05a
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• pp.15-19
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• 1993

지구의 환경 문제는 국제적으로 점차 그 중요성이 증대되고 있다. 지구에 인류가 존재하는 한 환경은 오염될 수밖에 없으며 그 결과 지구 생태계의 커다란 변화가 다가올 것이라는 것은 주지의 사실이다. 따라서 지구 환경의 보존을 위해 에너지 이용 효율성을 제고해야 하며, 청정 에너지의 개발, 사용으로 온실 효과의 주범인 $CO_2$ 발생량을 줄이기 위해 화석 연료의 사용을 억제할 수 있는 대책과 화석 연소로부터 발생되는 NO$_{x}$ 나 SO$_{x}$ 등에 의한 산성비로 생태계의 파괴를 막을 수 있는 청정 에너지의 개발을 위한 사회, 환경적인 정책적 제도 도입이 활발히 진행되고 있다. (중략)

• Fire Science and Engineering
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• v.19 no.2 s.58
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• pp.8-12
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• 2005

A fire in a clean room may cause a serious loss by spreading smoke particles. The effects of the width of smoke curtains on delay in smoke spread, which is located the work area boundaries, were investigated by using a computational fluid dynamics, for loss prevention by smoke spreading from one fire area to another. The fire scenario was set to a 1 MW methanol fire in a space of $30m\times10m$ floor and 4 m high. Distributions of temperature and smoke particles were compared for the width of the smoke curtains 0 (without smoke curtains), 1, 2, 3m. It was confirmed that a larger width of the smoke curtain delays spread of smoke more, and that making the work areas compartments is necessary to confine the smoke in the fire area.

• Clean Technology
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• v.5 no.2
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• pp.13-23
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• 1999

The unique method for evaluating the environmental impact, which is restricted to use in BS7750, was performed to determine the priority for reducing environmental loads in the cement process. Mass balance in the unit process was achieved, it was utilized to introduce the matrix method which are composed of two different evaluation's criteria by occurrence possibility and by occurrence results. The purpose of this paper is first to explain the matrix method in the practical plant and secondly to show the successful examples of enviromental improvement. Conclusively, the seriousness of environmental impact could be quantified in several different unit processes and suggested some progressive results obtained after process improvement.

• Proceedings of the Korean Society of Computer Information Conference
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• 2017.01a
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• pp.63-66
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• 2017

현대인의 실생활은 무수히 많은 사물간의 데이터를 주고받을 수 있는 연결고리로 이루어져 있다. 이러한 연결고리 속에서 우리는 IoT(Information of Things), 즉 사물인터넷을 쉽게 경험할 수 있다. 본 논문에서는 이러한 사물인터넷의 활용으로 인한 차량 내 각 시트에 무게를 측정할 수 있는 하드웨어 시스템 및 안전벨트 연결 확인 하드웨어 시스템을 부착하여, 차량 내 탑승인원을 파악하고 그에 대한 할인 시스템을 개발하여 차량감소 효과로 인한 주차공간 확보 및 대기오염으로부터 청정효과를 기대할 수 있는 시스템을 제안하고자 한다.

• Particle and aerosol research
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• v.16 no.3
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• pp.65-72
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• 2020

In this study, the indoor fine dust concentration in an office of the Korea Knowledge Industry Center was measured for about 80 hours when the concentration of atmospheric PM_2.5 was very high. The effect of the operation of the air cleaner and the forced ventilation system on the indoor PM_2.5 was investigated, and the particle size distribution of the indoor and outdoor particles was analyzed. When forced ventilator and air purifiers were partially used, the indoor PM_2.5 concentrations were maintained between 27.7 ㎍/㎥ and 32.9 ㎍/㎥ when the atmospheric PM_2.5 was 127.7 ㎍/㎥ to 141.6 ㎍/㎥ during working hours. It is more effective to operate the air purifier without operating the forced ventilation system when the concentration of the PM_2.5 is high since the PM_2.5 penetrating the installed filter is continuously introduced indoor from the outside.

• Clean Technology
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• v.6 no.2
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• pp.85-92
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• 2000

For increase of recycling rate of steel-making slag, the swine wastewater treatment using steel-making slag as filter media were investigated. As the discharged wastewater from the existing facilities retreated through the laboratory wastewater treatment equipment filled with steel-making slag as filter, pH of retreated wastewater was increased, and the concentration of N, P, COD and BOD were decreased. For the pilot experiment, steel-making slag eliminated suspended substances and absorbed a shock of sudden change of their concentration in influent. COD and BOD were decreased under the influence of them in influent. As calcination increased the amount of free-CaO in steel-making slag, the calcined eliminated phosphorus more effectively and increase pH than the uncalcined.

• Culinary science and hospitality research
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• v.22 no.8
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• pp.149-156
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• 2016

The purpose of this study is to reduce the contaminants (total volatile organic compounds (TVOCs), fine particle, odor and total airborne bacteria) during cooking process in cooking chamber, and to decrease the health damage in indoor space that has bad work environment. In order to solve the shortcomings of existing air purifiers and remove all kinds of pollutants effectively, this study focused on the development of indoor air purifiers which are made of bar type. Bio-ceramics filter which combines activated carbon and loess. The air cleaners developed with 4 measuring items including TVOCs, particulate matter, complex odor and total airborne bacteria were measured comparing their pre-service test to their post-service test after a period of time. The measured results showed higher removal efficiency of 91.02% as the concentration of TVOCs was reduced from $2,500{\mu}g/m^3$ to $223{\mu}g/m^3$. Second, the particulate matter removal ratio was 97.51% efficient with average concentration of $26.68{\mu}g/m^3$. Third, the odor showed 95.20% reduction as air dilution ratio averaged out at 144. Last, total airborne bacteria was eliminated by over 94% showing the changeable concentration from $787{\sim}814CFU/m^3$ to $47{\sim}40CFU/m^3$. In addition, the removal rate of harmful pollutants is excellent, and it is expected that the environment of the existing poor cooking room will be greatly improved by using the developed air purifier in combination with the ventilation device and the stove hood.