• 한국습지학회지
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• 제15권3호
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• pp.387-396
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• 2013

비점오염원은 배출원, 유출경로 및 배출량이 명확하지 않아 관리에 많은 어려움이 있다. 최근 들어, 비점오염 관리를 위해 다양한 비점오염저감시설들에 대해 개발 및 연구 되고 있다. 또한 비점오염시설의 정확한 평가를 위해 다양한 효율산정 방법들이 제시되고 있다. 본 연구에서는 강우 시 식생수로 길이별 모니터링 결과를 토대로 식생수로의 길이가 저감효율에 미치는 영향에 대해 연구를 수행하였다. 또한 식생수로 길이별 저감효율을 다양한 방법으로 산정하여 효율 산정방법에 따른 차이를 비교하고자 하였다. 효율 산정 방법으로는 ER, SOL, ROL, ROF, SOLF, ROLF 방법을 이용하여 분석하였다. EMC 분석결과 유입 및 유출량의 농도차이가 유기물질이 염양염류에 비하여 크게 나타났다. 식생수로 길이에 따른 효율 분석 결과 식생수로 유입부에서 효율이 급증하고, 이 후에는 효율 증가가 점차 감소하는 것으로 나타났다. 이는 식생수로 전단에 설치된 저류지에 의한 것으로 판단된다. 식생수로의 저감효율을 확보하기 위해서는 식생수로의 길이가 최소 30m이상으로 충분히 확보되어야 한다. 또한 식생수로의 경제적이고 효율적인 설계를 위해선 단순한 효율분석이 아닌 식생수로 최소 길이에 대한 연구가 필요하다.

• 한국습지학회지
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• 제20권4호
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• pp.304-313
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• 2018

새만금 간척지의 농지 간척 사업은 대부분 2020 년까지 완공 될 예정이며, 그 시기 토지의 관개용수 활용에 대한 대비가 필요한 실정이다. 그러나 관개수의 수질은 드물게 목표 농도를 충족하고 있다. 이에 본 연구에서는 논에서의 최적관리기법(BMPs)인 토양검정시비(SO#1), SO#1과 SO#3의 복합처리(SO#2), 배수물꼬(SO#3), 완효성 비료시비 (SO#4) 방법을 관행재배(CT: Control)와 비교하여 논 비점오염원 저감효과 및 정책개발 시의 고려사항을 기술하였다. 논에서의 유출 저감은 SO#3(25%)와 SO#1(27%)에서 관행재배와 비교하였을 때 상대적으로 높았으나, SO#4(9%)와 SO#2(7%)에서 낮게 나타났다. 논 유출량의 NPS 오염물질 농도와 부하는 변화의 폭이 높게 나타났으며 BMPs 중에 유의한 차이는 나타나지 않았다. 또한 농민들의 인식조사 결과, 농민들은 실제 BMP 구현의 한계로 기존 관행적인 영농활동을 유지하고 있는 것으로 나타났다. 따라서 NPS 오염물질 관리와 관개수 절약을 위해서 농민 교육 및 지원과 함께 관개물꼬 및 논의 담수심을 자동 조절할 수 있는 관리방안이 필요할 것으로 판단된다.

• 수산경영론집
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• 제40권3호
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• pp.29-49
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• 2009

There are various types of predictable economic benefits to restoring beneficial uses from contaminated marine sediment cleanup. These benefits can be derived from reduction in aquatic animals died or infected, increase in their consumption recovery, increase in tourism including recreational fishing, reduction in human health risk, increase in amenity and aesthetics, increase in ecosystem integrity, and so on. The paper focuses on estimating the net increase in value for producers and consumers from producing and consuming those fish due to the pollution reduction of marine contaminated cleanup project. Almost Ideal Demand System(AIDS) is employed for estimate of the demand for fish, and the production cost function for fish are determined using market data. The result shows 10.8 billion won per year for economic surplus to the net increase for producers and consumers.

• 한국마린엔지니어링학회:학술대회논문집
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• 한국마린엔지니어링학회 2002년도 춘계학술대회논문집
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• pp.187-191
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• 2002

The exhaust gas from electric power stations, incinerators and industrial boilers contains considerable amount of harmful nitric oxide which causes air pollution. Selective catalytic reduction system with ammonia as a reductant(NH$_{3}$ SCR) have been applied to remove NOx since 1970. it is widely accepted that the NH$_{3}$ SCR process is the best method for the removal of NOx. In this paper the design of SCR reactor based on the NOx displacement is considered and the design program of SCR reactor is developed. The newly developed design program for de-NOx system maybe used in practice.

• 한국대기환경학회지
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• 제6권1호
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• pp.51-56
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• 1990

This Study shows the effect of the district heating on the $SO_2$ concentration reduction. In order to analyze the effect of the district heating, three alternatives were set up as follows; Alternative I represented present central heating system, and Alternative II and Alternative III represented district heating system of which the scale were different from. The concludions of this study are as follows; In case of the Alternative II and III, annual average $SO_2$ concentration are reduced by 9.0% and 14.6% respectively, and winter season $SO_2$ concentrations are reduced by 12.2% and 15.8% respectively, at the highest points. The average reduction rates of $SO_2$ concentration in the district heating area are about the same as the reduction rates at the highest points. Also, it was found that using the district heating system, the ground level $SO_2$ concentrations could be reduced within the area of 5 to 10 km radius.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2005년도 동계학술발표대회 논문집
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• pp.500-505
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• 2005

This paper introduces an experimental study for the noise characteristics and reduction of a ventilating fan system. For the purpose of noise reduction of it, an absorptive duct silencer filled with a glass fiber has been conventionally utilized. However, a glass fiber has some disadvantages like hygiene and secondary pollution problems. In order to overcome these problems, in this paper, a perforated duct silencer has been applied to the ventilating fan system. For the designing of a perforated duct silencer, the transmission losses for various perforated panel systems are measured and compared with their sound absorption performances.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 추계학술대회 논문집
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• pp.750-761
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• 2008

The social and economical value assessment of railway facilities implies unaccountable values such as: reduction of travel time, reduction of car accident, reduction of air pollution. However, the value of railway facilities has been evaluated as the transportation and management results. The investment and management results of railway need to be considered objectively. Therefore, this study established the economical value assessment method of railway facilities composed of 10 items of economical value through the existing a preliminary assessment investigation, a manual of railway investment assessment, paper study. In addition, this study proposed the strategy for the value assessment of railway facilities before and after.

• 대한교통학회지
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• 제25권6호
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• pp.89-97
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• 2007

고도의 산업화와 경제발전으로 인한 자동차 의존적인 교통체계는 도심의 교통혼잡, 에너지소비, 대기오염과 소음, 교통사고 등과 같은 많은 문제를 유발하고 있는 실정이다. 특히, 도심에서 자동차로 인한 대기오염은 과거 산업활동에 의해 발생된 공해문제보다 더욱 심각한 수준에 이르고 있다. 이에 본 연구에서는 미시적 시뮬레이션을 이용하여 자동차 배출가스 저감 효과를 파악하고 경제성 분석을 통해 도심지에서 대기오염을 최소화 하면서 차량 소통을 원활히 할 수 있는 교통정책이 무엇인지를 파악하였다. 그 결과, 차량 요일제가 투자비용이 없어 가장 효과적인 방법인 것으로 나타났으나 시민들에게 강제성을 부여함으로써 자동차 수요를 억제시키기 때문에 시민들과의 공감대 형성이 무엇보다 중요하며, 다른 대안들과 병행하여 추진하는 것이 효과적일 것이라는 결론을 얻었다. 향후 연구과제는 선호의식 조사를 통해 시민들이 생각하는 자동차 배출가스의 대기오염 영향을 조사하고 본 연구 결과를 통해 나타난 차량 요일제 도입시 참여 의사를 조사하여 실제 교통정책 도입 가능성 등을 파악하는 연구를 진행 해야겠다.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2003년도 춘계학술발표회
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• pp.191-200
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• 2003

Gunsan coastal area is one of region increasing pollution problems. One of the most important factors that cause eutrophication is nutrient materials containing nitrogen and phosphorus which stem from excreation of terrestial sources. At this study, the three-dimensional numerical hydrodynamic and ecosystem model, which was developed by Institute for Resources and Environment of Japan, were applied to analyze the processes affecting the eutrophication. The residual currents, which were obtained by integrating the simulated tidal currents over 1 tidal cycle, showed the presence of a typical. Density driven currents were generated westward at surface and eastward at the bottom in Geum estuary area where the fresh waters are flowing into. The ecosystem model was calibrated with the data surveyed in the field of the study area in annual average. The simulated results of DIN were fairly good coincided with the observed values within relative error of 32.39%. correlation coefficient(r) of 0.99. In the case of DIP, the simulated results were fairly good coincided with the observed values within relative error of 24.26%, correlation coefficient (r) of 0.82. The simulations of DIN and DIP concentrations were performed using ecosystem model under the conditions of 20 ∼ 80% pollution load reductions from pollution sources. In study area, concentration of DIN and DIP were reduced to 20∼80% and under 10% in case of the 80% reduction of the input loads from fresh water respectively. But pollution loads from sediment had hardly affected DIN and DIP concentration. For the environment management of coastal areas, in case of Kunsan area, the most important pollution sources affecting eutrophication phenomenon were found to be the input loads from fresh water.

• 환경위생공학
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• 제14권4호
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• pp.137-142
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• 1999

Current semiconductor industry factories are relying on the end-of-pipe treatment technology for waste water treatment and thus they mostly suffer from severe industrial water shortage. As a result in order to solve those waste and industrial water problems, there requires to be changed to the Clean Technology, that is Pollution Prevention Technology. Through above strategic actions with the Clean Technology, we shall strength more powerful and logical environmental pollution prevention system than those in the past. By changing the end-of-pipe treatment technology for waste water treatment and thus they mostly suffer from severe industrial water problems, there requires to be changed to the Clean Technology, that is Pollution Prevention Technology. Through above strategic actions with the Clean Technology, we shall strength more powerful and logical environmental pollution prevention system than those in the past. By changing the end-of-pipe treatment technology with physical, chemical and biological treatment methods as a mixed stream basis for treating of semiconductor waste stream into clean technology with pollution prevention technology as a waste segregation basis, we can bet 20 to 30% investment reduction as compared with end-of-pipe treatment technology.The results for water quality analysis were as follows : 1. Water quality analysis of the before treatment : pH : 9~10.5, Conductivity : $300~7,000{\mu}s/cm$, TDS : more then $3,000mg/{\ell}$, COD : $200~250mg/{\ell}$, SS : $500~600mg/{\ell}$, n-H : $8.3mg/{\ell}$ 2. Water quality analysis of the after treatment : pH : 6.5~7.5, Conductivity : 0.059, TDS : $40{\mu}s/cm$, COD : $20mg/{\ell}$, SS : $5mg/{\ell}$ n-H : $0.6mg/{\ell}$