• Title, Summary, Keyword: Pollution control

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Biotreatment Technologies for Air Pollution Control (생물학적 처리기술을 이용한 대기오염 제어)

  • Won, Yang-Soo
    • Clean Technology
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    • v.13 no.1
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    • pp.1-15
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    • 2007
  • Biological treatment is a relatively recent air pollution control technology in which off-gases containing biodegradable odors and volatile organic compounds(VOCs) are vented through microbes. It is a promising alternative to conventional air pollution control methods. Bioreactors for air pollution control have found most of their success in the treatment of dilute and high flow waste air streams containing VOCs and odor compounds. They offer several advantages over traditional technologies such as incineration or adsorption. These include lower treatment costs, absence of formation of secondary pollutants, no spent chemicals, low energy demand and low temperature treatment. The three most widely used technologies are described, namely biofiltration, biotrickling filtration, bioscrubbing. The most widely used bioreactor for air pollution control is biofilter, but it has several limitations. In the past years major progress has been accomplished in the development of vapor phase bioreaction systems, for solving problems of biofilter. Biotrickling filters are more complex than biofilters, but are usually more effective, especially for the treatment of compounds which are difficult to degrade or compounds that generate acidic by-products. This, paper reviews fundamental and theoretical/practical aspect of air pollution control in biofilter, biotrickling filter and bioscrubber, focusing more extensively on biotrickling filtration. Special emphasis is given to the operating parameters and the factors influencing performance for air pollution control, and cost estimation in biotreatment technologies.

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A Study on the Control Standards and an Environmental Lighting Zone-Setting method for Making Light Pollution Management (빛공해 방지를 위한 관리기준 및 조명환경관리구역 설정 방안에 관한 연구)

  • Kim, Ki-Tae;Oh, Min-Seok;Kim, Hway-Suh
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.25 no.12
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    • pp.27-33
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    • 2011
  • This study aims to suggest some problems, which occur when environmental lighting zone is set by use-zone only, by comparing and analyzing the artificial illumination luminance. In addition, this study aims to review the control standards of light pollution and to suggest a practical environmental lighting zone-setting method. I checked out the standards of average surface luminance and luminance contrast as for light pollution management. In addition, I did some research on evaluation of light pollution on surroundings based on investigation of use-environment as for lighting environment setting method.

A Modified Mesh Generation Algorithm Using Pollution Error (Pollution error를 이용한 개선된 요소생성 알고리즘)

  • 유형선;장준환
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • pp.34-42
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    • 2001
  • In this paper, we study on a modified mesh generation method based on the pollution error estimate. This method is designed for the control of the pollution error in any patch of elements of interest. It is a well-known fact that the pollution error estimates are much more than the local one. Reliable a posteriori error estimation is possible by controlling the pollution error in the patch through proper design of the mesh outside the patch. This design is possible by equally distributing the pollution error indicators over the mesh outside the patch. The conventional feedback pollution-adaptive mesh generation algorithm needs many iterations. Therefore, the solution time is significant. But we use the remeshing scheme in the proposed method. We will also show that the pollution error reduces less than the local error.

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A Impact Analysis of Air Quality by Air Pollution Control Facilities Improvement on Point Source Pollution (점오염원의 대기오염방지시설 개선에 의한 대기질 영향 분석)

  • Jeon, Byeong-Geun;Lee, Sang-Houck
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.16 no.4
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    • pp.2876-2882
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    • 2015
  • The object of this study is to identify changes in air pollution in the maximum ground level concentration and the surrounding area when air pollution control facilities are improved in the thermal power plants. The effects of improved facilities are analyzed by comparing air quality after applying improved air pollution control facilities. For prediction of air quality, the change of wind field can be represented with movement of Puff and CALPUFF Model, air pollution diffusion models which can implement abnormal conditions. Major air pollutants of thermal power plants such as $SO_2$, $NO_2$, and $PM_{10}$ are selected as prediction items. That results show that improvement of air pollution control facilities is significantly effective in reduction of air pollution of $SO_2$ and $NO_2$ in the maximum ground level concentration and areas around of thermal power plants. In the case of $PM_{10}$, it is found that the effect of reduction in pollution is high in the maximum ground level concentration, but the effect of reduction in air pollution is somewhat low in the area around of the thermal power plant.

An optimal regulation for environmental pollution control in oligopoly (과점시장의 환경오염 규제를 위한 최적유인제도에 관한 연구)

  • 김재철;이상호
    • Proceedings of the Korean Operations and Management Science Society Conference
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    • pp.194-211
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    • 1993
  • This paper proposes an optimal incentive scheme for environmental pollution and output control in oligopoly markets under asymmetric information situation where the regulator has no information about each firm's technology on output productions and pollution abatements. We compare two interesting optimal incentive schemes (one is static model previously proposed and the other is dynamic model suggested in this paper), analyze features of these schemes, and carefully discuss its relevances to other schemes.

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The Air Pollution Prevention and Control Division's Program within U.S. EPA's Office of Research and Development

  • Princiotta, Frank T.
    • Clean Technology
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    • v.2 no.2
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    • pp.30-41
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    • 1996
  • Air pollution problems are serious and present significant challenges to the engineering research community. EPA's engineering research programs have shifted from a primary focus on $SO_2$ and NOx pollution control to more complex and more difficult problems such as indoor air quality, air toxics, and global climate change. EPA research engineers are working closely with other research organizations in both the private sector and other federal research organizations to identify, evaluate, and develop cost-effective engineering solutions. The APPCE works closely with the EPA regulatory and regional offices to ensure that the best engineering information is utilized to formulate and implement the Agency's environmental protection program.

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A Study on the Risk Management of Oil Tanker Operation (유조선 운항에 따른 위험관리에 관한 소고)

  • 윤대근;박상갑
    • Journal of the Korean Institute of Navigation
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    • v.25 no.1
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    • pp.33-44
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    • 2001
  • Tankers have somewhat different shapes in construction and working condition compared with normal merchant ship. If an accident occurs, normal merchant ship's damages will mostly be confined to ship and cargo, but those of tankers will result in oil spills and catastrophic loss beyond our imagination. So, first we must understand risk factors, pre-loss control and post-loss control, legal regulations about its indemnification and marine insurance for oil tanker operation. When unexpected accidents happen, despite pre-loss control, it is possible to cover those kinds of losses by insurance. To control these losses, however, it is important to establish compensation for oil pollution and arrange for oil pollution preventing system. In spite of these oil pollution preventing systems, we have rarely seen that pollution from oil tankers could be solved. So this paper was studied more fundamental and overall control measures for the risk management of oil tanker operation.

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Lake Water Quality Modelling Considering Rainfall-Runoff Pollution Loads (강우유출오염부하를 고려한 호수수질모델링)

  • Cho, Jae-Heon;Kang, Sung-Hyo
    • Journal of Environmental Impact Assessment
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    • v.18 no.2
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    • pp.59-67
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    • 2009
  • Water quality of the Lake Youngrang in the Sokcho City is eutrophic. Jangcheon is the largest inflow source to the lake. Major pollutant sources are stormwater runoff from resort areas and various land uses in the Jangcheon watershed. A storm sewer on the southern end of the lake is also an important pollution source. In this study, water quality modelling for Lake Youngrang was carried out considering the rainfall-runoff pollution loads from the watershed. The rainfall-runoff curves and the rainfall-runoff pollutant load curves were derived from the rainfall-runoff survey data during the recent 4 years. The rainfall-runoff pollution loads and flow from the Jangcheon watershed and the storm sewer were estimated using the two kinds of curves, and they were used as the flow and the boundary data of the WASP model. With the measured water quality data of the year 2005 and 2006, WASP model was calibrated. Non-point pollution control measures such as wet pond and infiltration trench were considered as the alternative for water quality management of the lake. The predicted water quality were compared with those under the present condition, and the improvement effect of the lake water quality were analyzed.

Noise Pollution and the Perception of Noise in Seoul (서울시 소음공해 현황과 이에 대한 주민의 인식정도)

  • 정인희;이효수
    • Journal of Environmental Science International
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    • v.6 no.6
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    • pp.551-562
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    • 1997
  • Nine districts in Seoul were chosen randomly and a questionnaire containing 23 questions was distributed to survey the perception of noise pollution by the citizens. The results were primarily analyzed to understand the perception of Seoul citizen as a whole, and then analyzed according to 4 demographic variables -district area, age, gender and occupation -to see if there were any possible relation between nonnoise variables and noise annoyance. Actual noise level data measured by the city government were used to compare quantified noise level with the surveyed people's perception. It was found that people consider road traffic noise to be the naix source of noise pollution In Seoul and that most people have experienced annoyance in everyday life. Also it was verified that the responsibility for noise control should be on both city government and the individuals, but It was generally considered that very little effort Is actually put Into solong norse pollution from both groups. From the survey, It could be analyzed that domographic variables do affect people In the awareness of noise pollution, and that one's sensitifty and annoyance due to noise increase as one ages. From the study, It was concluded that noise pollution Is not considered currently as a hazardous problem to most Seoul citizens, however specific noise reduction policies, especially regarding road traffic noise, should be put Into practice In the near future.

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Dynamics of Environmental Policy Development in Korea : How did the Policy Windows have been opened? (한국 환경정책의 발달동인 : 정책의 창문은 어떻게 열렸는가?)

  • Rhee, Jeong-Jeon;Jeong, Hoi-Seong
    • Journal of Environmental Policy
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    • v.2 no.1
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    • pp.1-29
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    • 2003
  • This paper examines the dynamics of environmental policy development in Korea by reviewing some of the ways on how the policy windows have been opened. There are a lot of theoretical arguments about the major factors influencing policy development or changes. Many scholars have believed that severe pollution accidents or salient environmental episodes might have been the main motivation of environmental policy development. This line of argument seems valid, especially with the water pollution control policy in Korea. Water pollution control programs had rapidly expanded along with the series of water pollution accidents in the tap water sources from the late 1980s to mid-1990s. However, regarding other major env. issues, various other factors have played more important roles in the development of the relevant policies. In case of air pollution control policy international sport events such as, 1986 Asian Games, 1988 Summer Olympics, and 2002 World Cup Competition, have contributed for the development. The municipal solid waste management policy partly owed its development to the introduction of local autonomy system in the mid-1990s. Even the foreign currency crisis occurring in December 1997 helped the policy paradigm shift from rigid supply-oriented to soft demand-oriented approaches. After closely looking at the dynamics of environmental policy development in Korea, this paper tries to identify the logical background of the observed outcomes.

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