• Proceedings of the Korea Air Pollution Research Association Conference
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• 2007.10a
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• pp.106-108
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• 2007

• Journal of the Korean GEO-environmental Society
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• v.17 no.11
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• pp.35-43
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• 2016

In this study, by using a Effective Microorganisms Brewing Cycle, it confirmed the purification effect of pollutants that are adsorbed on the basins stench removal and retarding soil. On the basis of on-site application test, a soil decontamination system will be suggested. Using a Effective Microorganisms Brewing Cycle, the odor concentration is reduced 2.5 times than that of natural purification treatment method. It was measured and found that the quality of the pore water discharged from the soil is improved. In addition, it was found that a composite of copper and lead with the fermentation microorganisms adsorbed on soil particles from the surface of the stirred experiments lagoon mixed soil is reduced to 65% and 66%, respectively, The TPH organic component was confirmed that the reduction effect of 85%. Restoration of reservoir contaminated soils using the effective microorganism brewing cycle needs to be more developed and implemented as a long-term purification system. This study may be a good reference of developing more complete microorganism brewing system which will efficiently reduce the odor and soil contamination based on optimal stirring and mixing ratio of the compound solutions and contaminated soils in reservoir.

• Korean Journal of Soil Science and Fertilizer
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• v.39 no.3
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• pp.136-143
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• 2006

The study was carried out to evaluate odor emission during storage time and quality of liquid slurry fertilizer along with three storage container types installed at farmer's fields in Cheorwon. Liquid slurry manure stored in the liquid-circulated or the air-injected tank was very homogeneous in concentration of nutritional elements because of well mixing operation, while nutritional concentration of the manure stored in the non-treated tank was significantly different from top to bottom in the tank, which may bring about partially irregular growth of plant after its application. The potential capacity of offensive odor emitted from liquid slurry manure stored in the liquid-circulated or the air-injected tank was much lower than that emitted from manure stored in the non-treated tank. Low potential capacity may less emit offensive odor after application of piggery liquid slurry on the field. The efficiency in oder to reduce odor emission from liquid manure was slightly higher in the liquid-circulated tank than the air-injected tank

• Korean Chemical Engineering Research
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• v.49 no.2
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• pp.168-174
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• 2011

Various La-based perovskite catalysts were prepared by a Pechini method, and they were applied to the low-temperature oxidation of odor compounds exhausted from waste food treatment process for effective deodorization. Quantitative and qualitative analyses of exhausted gas were conducted to measure the amount of major odor compounds with respect to operation time. A standard odor sample composed of major odor compounds was then prepared for use as a feed for oxidation reaction system. Various transition metal(M)-substituted La-based perovskite catalysts ($LaMO_{3}$: M=Cr, Mn, Fe, Co, and Ni) were prepared and applied to the oxidation of odor compounds in order to investigate the $LaNiO_3$ catalyst showed the best catalytic performance. Pt-substituted perovskite catalysts ($LaNi_{1-x}Pt_{x}O_{3}$: x=0, 0.03, 0.1, and 0.3) were then prepared for enhancing the catalytic performance. It was found that $LaNi_{0.9}Pt_{0.1}O_{3}$ catalyst served as the most efficient catalyst. Supported perovskite catalysts ($XLaNi_{0.9}Pt_{0.1}O_{3}/Al_{2}O_{3}$: X=perovskite content(wt%), 0, 10, 20, 30, 40, 50, and 100) were finally applied for the purpose of maximizing the catalytic performance of perovskite catalyst in the low-temperature oxidation reaction. Catalytic performance of $XLaNi_{0.9}Pt_{0.1}O_{3}/Al_{2}O_{3}$ catalysts showed a volcano-shaped curve with respect to perovskite content. Among the catalysts tested, $20LaNi_{0.9}Pt_{0.1}O_{3}$/$Al_{2}O_{3}$ catalyst exhibited the highest conversion of odor compounds of 88.7% at $180^{\circ}C$.

• Analytical Science and Technology
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• v.22 no.6
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• pp.488-497
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• 2009

In this study, analytical methodology for several organic fatty acids (OFA: propionic acid (PA), butyric acid (BA), isovaleric acid (IA), and valeric acid (VA)) designated as new offensive odorants in Korea (as of year 2010) was investigated along with some odorous VOCs (styrene, toluene, xylene, methyl ethyl ketone, methyl isobutyl ketone, butyl acetate, and isobutyl alcohol). For this purpose, working standards (WS) containing all of these 13 compounds were loaded into adsorption tube filled with Tenax TA, and analyzed by gas chromatography (GC) system thermal desorber interfaced with. The analytical sensitivities of organic fatty acids expressed in terms of detection limit (both in absolute mass (ng) and concentration (ppb)) were lower by 1.5-2 times than other compounds (PA: 0.24 ng (0.16 ppb), BA: 0.19 ng (0.11 ppb), IA: 0.15 ng (0.07 ppb), and VA: 0.28 ng (0.13 ppb)). The precision of BA, IA, and VA, if assessed in terms of relative standard error (RSE), maintained above 5%, while the precison of other compounds were below 5%. The reproducibility of analysis improved with the aid of internal standard calibration (PA: $1.1{\pm}0.4%$, BA: $10{\pm}0.46$, IA; $12{\pm}0.3%$, VA: $4{\pm}0.1%$), respectively. The results of this study showed that organic fatty acid can be analyzed using adsorption tube and thermal desorber in a more reliable way to replace alkali absorption method introduced in the odor prevention law of the Korea Ministry of Environment (KMOE).

• Analytical Science and Technology
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• v.23 no.5
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• pp.446-456
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• 2010

In this study, the performance characteristics of DNPH sampling were investigated in the collection and analysis of 5 carbonyl compounds (CC) in air using the cartridge products produced by three different makers. For these experiments, gaseous standards of 5 CCs were prepared to cover 9 concentration levels for each compound (33~2600 nmol). Some cartridge products exhibited relatively high blank values of acetaldehyde (AA) and propionaldehyde (PA). The recovery rates of all three cartridges showed moderate reduction as the molecular weight of CC increased. In addition, when the recovery rate was compared by percent error (%), the most stable patterns were achieved in the intermediate concentration range of 263~1312 nmol (in case of AA). The overall results of our study suggest that the optimal range of recovery for a given concentration range should be considered to obtain the most reliable data for the DNPH cartridge method.

• Korean Journal of Agricultural Science
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• v.32 no.1
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• pp.43-51
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• 2005

This study was carried out to investigate the style of livestock house, concentration of malodorous substances of livestock feces and livestock houses in Daejeon area. Among the livestock houses investigated, as most of cow pens(94.5%) have sawdust or chaff on the bottom, there was no leakage of feces out of pen. Most pig pens adopted slury style, but some of them currently use buffering material on the bottom. It is thought that there will be no possible contamination leakage. When it comes to hen house, all the broiler house use litters on the bottom and all the layer house use scrapper. It is also thought that there will be no possible contamination leakage. 3 out of 12 deer pens used buffering material on the bottom, 10 places were maintained in a traditional method, and 7 places left possibility of contamination leakage considering whether the roof was installed or not. The contents of ammonia, amine and volatile fatty acid in fresh feces were lower compared to rotten feces, but the concentration of sulfur-containing matter - hydrogen sulfide, methylmercapthan and ethylmercapthan were higher compared to rotten feces. In the case of malodorous ingredient in livestock houses, only small amount of ammonia and hydrogen sulfide were detected in pig pen and hen house, and other ingredients were not detectable. And those who are engaged in animal husbandry reacted negatively to the use of feed additives for decreasing malodor. In conclusion, it is not worrisome that contamination can be leaked out of animal raising facilities. But if we take into consideration that the point of investigation time is wintry season, there should be more considerate attitude. And feed additives for decreasing malodor need establishing criteria in the manufacturing process.

• Journal of the Korean earth science society
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• v.25 no.4
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• pp.265-269
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• 2004

본 연구에서는 대기 중 황성분을 채취하는데 가장 널리 활용되는 방법 중의 하나인 테들러 백 방식의 채취와 관련된 오차요인을 여러 가지 관점에서 검정하고자 하였다. 이를 위해, 표준시료를 백과 백간에 이동시켜 주므로서, 백의 벽면을 통해 초래될 수 있는 성분별 손실율을 비교하였다. 상대습도 0 %, 실온 조건에서 실험한 결과, 황화수소와 멀캡턴과 같은 성분들은 백과의 접촉이 일어나면서, 20 %에 가까운 손실율이 확인되었다. 반면, 상대적으로 이들에 비해 반응성이 높지 않은 DMS, DMDS와 같은 성분들도 10 %내외의 손실율이 확인되었다. 이들 성분의 정확한 정량을 위해서는 테들러 백의 흡착손실 등에 대한 특성을 정확하게 파악하는 것이 중요하다. 특히, 습도나 온도와 같은 환경조건의 변화에 대한 고려도 동시에 수반되어야 할 것이란 점을 확인할 수 있었다.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2003.05b
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• pp.225-226
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• 2003

최근 인간의 생활환경에 존재하는 유해가스 및 대기 환경에 대한 관심이 고조되면서 환경유해가스를 손쉽게 감지할 수 있는 센서의 필요성이 중요하게 인식되고 있다. 그 중 암모니아 가스는 생활환경 내에 존재하는 악취성분일 뿐만 아니라 냉각기의 냉매로 사용되는 가스로서 대기 중 허용농도가 50 ppm으로 알려져 있다. 본 연구에서는 프린트스크린 인쇄법을 이용하여 SnO$_2$를 모물질로 하여 귀금속 산화물인 Pt와 Au를 첨가한 암모니아 반도체 가스센서를 제조하여 그 감도 및 SO$_2$, NOx, CH$_4$, NH$_3$, 에 대한 선택성을 분석하였다. (중략)

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.32 no.10
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• pp.27-30
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• 2003

배수관내의 공기의 압력변동을 완화시키는 방법의 하나인 통기밸브 등에 대해 소개한다. 배수설비의 목적은 위생기구로부터의 오배수를 건물 밖으로 신속하게 배출함과 동시에 배수관내에 악취성분을 포함하고 있는 오염된 공기가 실내로 침입하여 실내공기가 오염되는 것을 방지하기 위한 역할도 한다. 하수가스의 침입을 방지하기 위해 각종 형상의 배수트랩을 설치하는데, 여러 가지 원인에 의해 트랩내의 봉수는 파괴되기도 한다. 봉수파괴 원인 중에서도 가장 큰 영 향을 미치는 사이 폰 작용에 의한 봉수 파괴는 배수 수직관 및 수평주관내의 공기의 압력변동이 원인(유도사이펀 현상)이 되어 발생하거나 배수자신(자기사이펀 현상)에 의해 발생한다. 배수관내의 압력은 배수부하가 발생한 경우에는 그 배수에 의한 공기의 이동 등에 의해 변동하며, 배수가 없어도 배수관 접속부의 기압변동이나 상승기류에 의해 변동된다.(중략)