• Title, Summary, Keyword: Pollution control

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Understanding and Improvement of Best Available Techniques for Waste Incineration Facility (폐기물 소각시설 최적가용기법 (BAT) 기준서의 이해와 개선방향)

  • Shin, Sujeong;Park, Jae-Hong;Park, Sang-Ah;Lee, DaeGyun;Kim, Dai-Gon
    • Journal of Korean Society for Atmospheric Environment
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    • v.33 no.6
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    • pp.533-543
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    • 2017
  • As the public interest in environmental issues increased, the "Act On The Integrated Control Of Pollutant-Discharging Facility" was enacted. Through the integrated environmental pollution prevention act in which 19 industries with large environmental impacts are sequentially applied, pollutants can be managed in a medium-integrated manner and integrated permission of the business unit is possible and BAT can be applied to enable a scientific and proactive environmental management system. In order to facilitate the implementation of integrated environmental pollution prevention act with these advantages, the BAT BREF should be published, modified and revised every 5 years considering the level of scientific development. This study reviewed the issues to be considered in applying BAT and the types of BAT and focused on presenting improvements and development direction when revising and supplementing the standards in the future based on these contents. For this purpose, when revising the standards, it will be necessary to reflect on the domestic situation, to expand the TWG(Technical Working Group) of small-scale workplace experts, and to exchange opinions with business places that have similar processes for each waste type through a systematic total inspection. In addition to these methods, by establishing a resident participation system through information disclosure, it is expected to be used as a guideline for environmental management of business places not subject to integrated permission of less than 3 types as well as those subject to integrated permission.

A Study on the Development of the Air Pollution-Health Risk Model : The case of Seoul, Korea. (都市大氣汚染이 市民健康에 미치는 危險性 評價 模型의 開發에 관한 硏究)

  • 김귀곤;김명진;성현찬
    • Journal of Korean Society for Atmospheric Environment
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    • v.5 no.2
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    • pp.30-35
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    • 1989
  • To effectively develop and evaluate air pollution control measures, health risk rates due to air pollution must be identified. This article describes the application of a visual analysis and an air pollution-health risk model for determining the impacts of carbon monoxide (CO) exposure on angina pectoris patients in a metropolitan area. The procedures used for analyzing the relationship between CO exposure and the related increase in angina angina attacks for stable angina pectoris patients are described through a case study in the city of Seoul, Korea and the findings show that air-pollution-health risk model and visual analysis can be effective tools for environmental decision-makers, allowing air pollution control scenarios to be developed and evaluated for environmental protection. One of the features of this study is to provide a methodology for translating clinical findings into estimates of the relative contributions of air pollution to all causes of a particular disease. Therefore, there must be appropriate recognition of the uncertainties involved in the study.

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Current Management Status of Mercury Emissions from Coal Combustion Facilities: International Regulations, Sampling Methods, and Control Technologies

  • Lee, Sung-Jun;Pudasainee, Deepak;Seo, Yong-Chil
    • Journal of Korean Society for Atmospheric Environment
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    • v.24 no.E1
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    • pp.1-11
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    • 2008
  • Mercury (Hg), which is mainly emitted from coal-fired power plants, remains one of the most toxic compounds to both humans and ecosystems. Hg pollution is not a local or regional issue, but a global issue. Hg compounds emitted from anthropogenic sources such as coal-fired power plants, incinerators, and boilers, can be transported over long distances. Since the last decade, many European countries, Canada, and especially the United States, have focused on technology to control Hg emissions. Korea has also recently showed an interest in managing Hg pollution from various combustion sources. Previous studies indicate that coal-fired power plants are one of the major sources of Hg in Korea. However, lack of Hg emission data and feasible emission controls have been major obstacles in Hg study. In order to achieve effective Hg control, understanding the characteristics of current Hg sampling methods and control technologies is essential. There is no one proven technology that fits all Hg emission sources, because Hg emission and control efficiency depend on fuel type, configuration of air pollution control devices, flue gas composition, among others. Therefore, a broad knowledge of Hg sampling and control technologies is necessary to select the most suitable method for each Hg-emitting source. In this paper, various Hg sampling methods, including wet chemistry, dry sorbents trap, field, and laboratory demonstrated control technologies, and international regulations, are introduced, with a focus on coal-fired power plants.

Dynamic Model of the Road Tunnel Pollution by Neural Networks (신경망을 이용한 도로터널 오염물질 동적 모델)

  • 한도영;윤진원
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.16 no.9
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    • pp.838-844
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    • 2004
  • In a long road tunnel, a tunnel ventilation system may be used in order to reduce the pollution below the required level. To develop control algorithms for a tunnel ventilation system, a dynamic simulation program may be used to predict the pollution level in a tunnel. Research was carried out to develop better pollution models for a tunnel ventilation control system. A neural network structure was adopted and compared by using actual poilution data. Simulation results showed that the dynamic model developed by a neural network may be effective for the development of tunnel ventilation control algorithms.

SIMULATION-BASED EVACUATION ANALYSIS ON A HIGH SPEED COASTAL PASSENGER SHIP

  • Park, Jin-Hyoung;Kim, Hongtae;Lee, Dongkon;Lee, Jong-Gap;Park, Beom-Jin
    • Proceedings of the Korea Society for Simulation Conference
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    • pp.444-449
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    • 2001
  • There have been many accidents of passenger ships on the sea and they have caused a big loss of human lives. Maritime Safety Committee(MSC) of International Maritime Organization(IMO) made evacuation analysis of Ro-Ro passenger ships mandatory in order to save as many lives as possible at the time of accident. But this is a temporary regulation and HSC/IMO ties to introduce a performance-based regulation to improve the effect of regulation. Simulation-based evacuation analysis is the basis of performance-based regulation. In this paper, we performed a simulation-based evacuation analysis on a passenger ship, which is usually used in the plying between land and islands in Korea, with EXODUS system. Through inspecting the results from this analysis in more detail, we can make a proposal to improve the safety of passenger ship. Finally we describe the features of IMEX(Intelligent Model for Extrication Simulation), a new evacuation model being developed in KRISO.

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Phosphorus removal and recovery from wastewater by highly efficient struvite crystallization in an improved fluidized bed reactor

  • Lu, Bin;Xu, Jingcheng;Zhang, Ming;Pang, Weihai;Xie, Li
    • The Korean Journal of Chemical Engineering
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    • v.34 no.11
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    • pp.2879-2885
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    • 2017
  • Phosphorus is the crucial factor causing eutrophication in the aquatic ecology. The high phosphorus loading in water bodies may result from the direct disposal of untreated wastewater. In this study, a fluidized bed reactor (FBR) was specially developed to remove and recover phosphorus effectively and efficiently via struvite crystallization. Different physiochemical and hydraulic conditions, including hydraulic retention time (HRT), pH, and molar ratios of Mg : P, N : P and Ca : Mg, were explored to optimize the performance of this improved FBR. For the continuous operating trials, promising removal and recovery efficiencies were achieved at the phosphorus concentration of 25.0 mg/L:>90% of phosphorus could be removed under the optimum condition (pH=9, HRT=12 h, Mg : P=1.25 and N : P=7.5). Increasing the recycle flow rate and prolonging the contact time could also enhance the FBR efficiency. The crystal products obtained in FBR were analyzed in terms of composition and structure. Results indicated that almost pure struvite (>99%) was achieved at low calcium concentrations, which could be considered as a high quality fertilizer.

Conditional Event Matching Prediction of Nonlinear Phenomena of Insulator Pollution in Coastal Substations Based on Actual Database

  • Nakamura, Masatoshi;Goto, Satoru;Katafuchi, Tatsuro;Taniguchi, Takashi
    • 제어로봇시스템학회:학술대회논문집
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    • pp.157-160
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    • 1999
  • A prediction method of conditional event matching pre-diction (EMP) for a purpose of predicting nonlinear phenomena of insulator pollution was proposed in this paper. The EMP was used if the conditional probability for increase of insulator pollution exceeded a threshold value. A performance of the EMP was strongly related to selection of database of events and a closeness function. By use of the prediction of the insulator pollution based on the conditional EMP, reliable decision making for the washing timing of the polluted insulators was e-valuated based on actual data in Kasatsu substation, Japan.

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Inhibition of Microcystis aeruginosa by the Extracellular Substances from an Aeromonas sp.

  • Liu, Yu-Mei;Chen, Ming-Jun;Wang, Meng-Hui;Jia, Rui-Bao;Li, Li
    • Journal of Microbiology and Biotechnology
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    • v.23 no.9
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    • pp.1304-1307
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    • 2013
  • Growth of Microcystis aeruginosa could be inhibited significantly within 24 h by the extracellular substances prepared from Aeromonas sp. strain FM. During the treatment, the concentration of extracellular soluble carbohydrates increased significantly in algal culture. Morphological and ultrastructural changes in M. aeruginosa cells, including breakage of the cell surface, secretion of mucilage, and intracellular disorganization of thylakoids, were observed. HPLC-MS analysis showed that the extracellular substances of Aeromonas sp. strain FM were a mixture of free amino acids, tripeptides, and clavulanate. Among these, the algaelysis effects of lysine and clavulanate were confirmed.

Effects of an Early Childhood Environmental Education Program on Knowledge, Emotional Attitude, Perceived Behavior Control, and Behavioral Intention toward Environmental Pollution (유아환경교육프로그램이 환경오염에 대한 지식, 정서적 태도, 행동통제감 및 행동의도에 미치는 효과)

  • Gwon, Gi-Nam;Yoo, An-Jin
    • Journal of the Korean Home Economics Association
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    • v.43 no.8
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    • pp.99-114
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    • 2005
  • The aim of this study was to estimate the effects of an early childhood environmental education program developed on the basis of relationships among preschoolers' knowledge, emotional attitude, and perceived behavior control of environmental pollution on their knowledge, emotional attitude, perceived behavior control, and behavioral intention. A total of 146 five-year-old preschoolers from eight child-care centers in Seoul and Kyoungki Province participated in this study. The following are the main results of this study. first, the higher the level of knowledge the preschoolers had, the more negative emotional attitude they displayed. Furthermore, the more negative emotional attitude they displayed, the higher the level of perceived behavior control they had. On the contrary, the relationships between knowledge and perceived behavior control varied with exposure situation to environmental pollution. Second, after the environmental education program was administered to the experimental group, the preschoolers from experimental group exhibited more knowledge, more negative emotional attitude, higher perceived behavior control and more active behavioral intention towards environmental pollution than those in the control group.

An implementation Of Control Loop For Domestic Flue Gas Desulfurization System (국산 개발 배연탈황 설비의 제어루프 구현)

  • Lee, Chan-Ju;Kim, Eung-Seok
    • Proceedings of the KIEE Conference
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    • pp.825-827
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    • 1998
  • Air pollution is one of the most important global issues of the environmental concerns. Some advanced foreign countries have developed the air pollution control technology. KEPCO has been researching on the air pollution control technology and developed the FGD(Flue Gas Desulfurization) system for 200MW thermal power plant. In this paper, we describe the major control loops implemented to the domestic FGD system. The major control loops are to be classified into booster fan control, absorber PH control and limestone density control. The control loops were applied to the actual desulfurization processes and proved to their performance.

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