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        검색결과 32

        21.
        2019.12 KCI 등재 구독 인증기관 무료, 개인회원 유료
        In this study, the grid field olfactory odor method was supplemented to the domestic situation in the surrounding areas of a domestic science industrial complex. The actual condition of the occurrence of odor frequency in the field was then investigated over the first period of late spring to summer and the second period of autumn in 2017. The frequency of odor occurrence in the area around the science industrial complex was increased as odor discharge facilities in the nearby area were concentrated. The odor occurrence frequency of the total period was 0.09~0.28, that of the first period was 0.08~0.32, and that of the second period was 0.05~0.25. The odor occurrence frequency in summer was higher than in autumn. The frequency by which the measurement of odor occurrence by smell type was most dominant was mainly smell of chemicals, plastics, and livestock houses during the first period, and the smell of chemicals, burning gases, and plastics during the second period. And the frequency of each smell type was judged to be different according to season. The odor occurrence frequency was measured as higher than 0.15, which is the standard of Germany's odor frequency in an industrial area, and it was judged that measures for odor management in the region were necessary. Since most of the odor discharge facilities are non-continuous systems and the odor generation frequency is more important than the concentration of the minimum detection concentration, it was judged that the German grid method can reflect the odor occurrence characteristics of the odor complaints or receptors for a certain period of time compared to the domestic measurement method. In the future, it was judged that the field olfactory odor method would be able to replace the evaluation method of odor assessment in Korea with the survey method of odor assessment under actual conditions in areas where it is difficult to access the odor discharge source or the receptor where odor complaints occur.
        4,000원
        22.
        2013.10 구독 인증기관·개인회원 무료
        Precautionary measures are cost-effective for the introduction and management of industrial insects. However, the Influx of exotic pests has not been managed very well in Korea, because of the system problems such as the lack of quarantine facilities. Additionally, there is no managing facilities or regulations for their installation according to the categories about industrial insects in Korea. Firstly, we studied the foreign guidelines for arthropod containment system such as ACLs(Arthropod Containment Levels) and the applicable guidelines for insect quarantine facilities in Korea. Secondly, we classified the types of industrial insects by their characteristics and considered the practicable guidelines for installation of quarantine facilities according to the industrial insect types. Lastly, with the related references including the details about installation and management for LMO(Living genetically Modified Organism) research facilities, we discussed appropriate guidelines for installation and management of pest quarantine system in Korea.
        23.
        2009.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The objectives of this study were to analyze the characteristics of odor in the major facilities of a fishery industrial complex using the air dilution olfactory method and the instrumental analysis method. The results indicate that although the limit of dilution to threshold (D/T) ratio in the major facilities is not regulated by the Odor Emission Standard, the mean (D/T) ratio over than 3,000 which is higher than the limit in the outlet of industrial area 3 times was found at three sampling sites. In the case of the concentration of the malodorous compounds, ammonia concentration is higher than any other odor compounds. The methyl mercaptan, n-Butyric acid and hydrogen sulfide as the main pollutants are confirmed by the odor quotient (OQ). In our study, it is showed a moderately good correlation between the (D/T) ratio and the sum of OQ. By this result, we can estimate the odor characteristics and evaluate the potential impact of each odor compound. In addition, we consider that it will affect the people"s normal life and even cause for complaint around the boundary area by the diffusion of odor.
        4,000원
        24.
        2006.06 KCI 등재후보 구독 인증기관 무료, 개인회원 유료
        The emission concentrations of VOC and various odorous compounds were measured from different indoor process units located in 19 companies at the Ban Wall industrial complex from Jun. 2004 to Jan. 2005. The purpose of this study was to investigate the indoor pollution levels of various industrial facilities with respect to bothmalodorous compounds and volatile organic compounds (VOC). We also intended to build the database under the conditions affected by various anthropogenic processes with an aid of a statistical treatment. The three samplingmethods and five analytical techniques were applied tomeasure the sum of up to 32 individual compounds. According to this study, we were able to identify the importance ofmajormalodor compounds which include carbonyl compounds, reduced sulfur compounds, ammonia and trimethylamine. On the other hand, relative contribution of VOC as sources ofmalodor was ofminor significance except such compound as toluene. The overall results of this study thus indicate that the concentration levels of VOC in themanufacturing facilities are high enough to affect indoor laboring conditions.
        5,700원
        25.
        2020.05 KCI 등재 서비스 종료(열람 제한)
        This study analyses the characteristics of volatile organic compounds (VOCs) emissions from the painting and printing facilities, as well as ambient VOCs at industrial complexes in Gwangju. The major components of VOCs emissions from painting facilities were toluene, acetone, 2-butanone, ethyl acetate, ethyl benzene, o-xylene and m,p-xylene. The printing facilities mostly emitted ethyl acetate, 2-butanone, acetone and toluene. Aromatics (49.9%) and oxygenated VOCs (43.6%) were dominant in painting facilities, while oxygenated VOCs (92.7%) were the largest group in printing facilities. The total hydrocarbon concentration (THC) in printing facilities was approximately six times higher than in the painting facilities. The painting and printing facilities use many solvents. Their THC concentrations differed considerably depending on the type of prevention facilities. To reduce THC, it is necessary to improve the prevention facilities and operating conditions. The dominant species of ambient VOCs in industrial complexes were investigated with toluene, ethyl acetate, 2-butanone, ethyl benzene, m,p-xylene, butyl acetate, o-xylene, hexane and acetone. Factor analysis of ambient VOCs showed that the main sources of the VOCs were organic solvents used in painting, coating, and printing, as well as automobile emissions.
        26.
        2018.03 KCI 등재 서비스 종료(열람 제한)
        In the past, the role of incineration facilities was mainly to reduce waste and stabilize disposed material. However, as a key aspect of waste management policy, the concept of “waste Minimization and sustainable resource circulation society” has become an issue, and the effective use of waste has been emphasized. As a result, to promote the recycling of wastes from January 1, 2018, the Framework Act on Resource Circulation has been implemented. In this study, estimation factors that can affect the increase of energy recovery are selected by reviewing the estimation method of industrial waste incineration facilities having a separate boiler; moreover, the effect of calculation factors on energy recovery was quantitatively evaluated. According to this study, when the heat loss, condensate temperature, and power consumption decrease by 10%, the energy recovery of the target facilities increase by 0.4% (0.22 ~ 0.63%), 1.09% (0.57 ~ 1.32%), and 1.16% (0.52 ~ 2.13%) on an average.
        27.
        2016.07 KCI 등재 서비스 종료(열람 제한)
        The lower heating value is the basic unit to calculate annual energy in estimating an energy gain factor. Reliability of an energy gain factor depends on the accuracy of the lower heating value. However, the deviation of heating value is large, and there is no common standard. Thus, the present methods of estimating the lower heating value (calorimeter method, ultimate analysis method, etc.) are inferior in accuracy. Besides, the conventional estimation method cannot reflect the waste's inhomogenous properties or seasonal effect. Hence, this study estimated the lower heating value on the basis of relation between heat input and heat output in equilibrium state by using the law of conservation of energy and the first law of thermodynamics for industrial waste incineration facilities (57 facilities) currently in operation. In the case of self-contained boilers, the lower heating value was an average of kcal/kg (1,984-6,476 kcal/ kg), and in case of separable boilers, the lower heating value was estimated to be an average of 3,787 kcal/kg (1,621- 486 kcal/kg).
        28.
        2016.07 KCI 등재 서비스 종료(열람 제한)
        This study focused on the evaluation of stability of mercury compounds in byproducts from industrial facilities. Stability testing was conducted using a 5-step sequential extraction procedure using six kinds of byproducts. The mercury compounds extracted were categorized as ion-exchangeable (F1), acid soluble (F2), organic matter-bound (F3), strong complex (F4), and residual (F5) mercury compounds. The amount of mercury in each step was calculated and compared with total mercury amount; a 51% to 92% recovery rate was estimated. Hg-extracted F1, F2, and F3 were easily released into environment. It is necessary to apply an appropriate method to handle byproducts that contain these portions of mercury. On the other hand, mercury in F4 and F5 fraction is relatively more stable. F4 fraction means strong complex and elemental mercury. Byproduct from metal production facility has a higher elemental mercury fraction. It was found that 89% and 65% of mercury were contained in F4 fractions from fly ash and sludge, respectively. The goal of this study is to investigate stability of Hg compounds in different byproducts to suggest appropriate treatment methods for each byproduct on its Hg compound characteristics.
        29.
        2015.10 KCI 등재 서비스 종료(열람 제한)
        A total of 15 different solid waste materials were analyzed for toxic substances such as Pb, Cd, Cu, As, Hg, Cr (VI)by the Korean standard leaching test and as total content. These wastes were also tested for corrosivity characteristicsusing an ionic electrode for pH and a circular steel for corrosion rate. Based on the results of the leaching test, the solidwaste samples did not exceed the regulated leaching levels. Thus, the analyzed wastes may be classified and managedas general industrial waste, not hazardous waste. Four solid waste samples were greater than total content levels proposedby other previous study. In case of the corrosive property of the solid waste leachate (1:2.5), the highest pH of the wastesample exhibited the lowest corrosion rate of 0.065mm/yr. However, the waste samples with low pH values exhibiteda greater corrosion rate. It is difficult to determine the correlation between pH and corrosion rate of the solid waste leachate.Therefore, the testing of the solid wastes are needed to further investigate the corrosion of a glass electrode method ratherthan the corrosion rate measurement. In the future, other hazardous properties such as ecotoxicity should be also examinedto properly manage the solid waste materials.
        30.
        2015.09 KCI 등재 서비스 종료(열람 제한)
        There were 35 typhoons affecting Korean Peninsula from 1999 to 2009(The average annual number of typhoon is 3.18). Among these typhoons, the number of typhoon passing through the Yellow sea, the Southern sea and the East sea were 14, 6 and 15 respectively. Wind speed on the height of 10 m can be finally estimated using the surface roughness after we calculate wind speed on the height of 300 m from the data on the surface of 700 hPa. From the wind speeds on the height of 10 m, we can understand the regional distributions of strong wind speed are very different according to the typhoon tracks. Wind speed range showing the highest frequency is 10~20 m/s(45.69%), below 10 m/s(30.72%) and 20~30 m/s(17.31%) in high order. From the analysis of the wind speed on the hight of 80 m, we can know the number of occurrence of wind speed between 50 and 60 m/s that can affect wind power generation are 104(0.57%) and those of between 60 and 70 m/s that can be considered as extreme wind speed are even 8(0.04%).
        32.
        1998.03 KCI 등재 서비스 종료(열람 제한)
        For efficient development of rural facilities, choice of their optimum locations would be an important issue, however, existing research works concentrated much more an allocation policy of urban industrial complex and public facilities than rural ones. In this study, because agricultural-cum-industrial complex has been the most widely developed representative one of rural facilities, it was selected as a case study facility. As a pre-study to system development, existing governmental location-decision system was checked and interviewing survey carried out to find out on-spot problems. And, being based on literature review and survey analysis results, 4-step optimum locational decision model was developed , formulation of locational goal system, ranking tabulation on components, determination of significance values of components, calculation of component scores. Finally, through the case study works on 3 sites, system applicability was checked, Considering together the simplicity problem of existing guidelines and the interviewing survey results favoring the diversified viewpoints, it would be necessary to develop multifaceted support system for locational decision making. 3-tier classification steps from the higher, middle to lower one were used and their underpinning viewpoints were sorted as on regional development, entrepreneurship, spatial rationality, from which a tentative locational goal system was formulated. Through the expert group checking, final locational goal system was determined having 3 of the higher classification items, 7 of the middle ones, 23 of the lower ogles. For ranking tabulation, 3 types of ranking criteria were arranged which were based on statistical analysis using mean and standard deviation(Type I ), its existence or not 1 good or not(Type E ), and the others(Type E ). From the significance evaluation results, regional development and entrepreneurship aspects were valued much higher than spatial rationality aspect. And, in the middle step, items as spread effects of regional economy, accessibility and social potentialities were highly valued while infrastructural development level and natural condition being low. The application results of the system to 3 case study total. However, the detailed ones differed among study the influencing effects on regional economy, and contrast greater the infrastructural development level. Conclusively, final evaluation values well represented the characteristics of each area. If this system be complemented and applied comprehensively by the successive studies, it would be developed to a general model of locational decision supporting system for rural facilities.
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