Dynamic Flux Chamber를 이용한 소사육시설의 암모니아 플럭스 및 배출계수 평가

사재환,전의찬,Sa, Jae-Hwan,Jeon, Eui-Chan 한국환경보건학회 2010 한국환경보건학회지 Vol.36 No.1

Atmospheric ammonia is a very important constituent of the environment because it is the dominant alkaline gaseous species present in the atmosphere. Ammonia is known to affect ecosystems at relatively low concentration. In this study flux profiles of ammonia emitted from the cattle housing were evaluated using a dynamic flux chamber (DFC). We have developed the emission factor of $NH_3$ from the cattle housing. Analysis of ammonia flux variation was made with respect to such variables as manure surface temperature, pH, and ammonium concentration. Ammonia flux has been measured up to summer in 2007 at calf and cattle housing. In the fall, average ammonia flux from calf and cattle housing was estimated as 1.406 (${\pm}0.947$) and 1.534 ((${\pm}0.956$) $mg\;m^2\;min^1$, respectively. In the winter, average ammonia flux was estimated 1.060 ((${\pm}0.569$) from the calf housing and 1.216 ((${\pm}0.655$) $mg\;m^2\;min^1$ from the cattle housing. The correlation coefficient (R=0.732) between ammonia flux and manure surface ammonium concentration exhibited stronger relationship than manure surface pH and temperature. In the fall, ammonia emission factor from calf and cattle housing was estimated as 3.94 ((${\pm}2.66$) and 11.41 ((${\pm}5.86$) kg-$NH_3$ animal$^1\;yr^1$, respectively. In the winter, ammonia average flux was estimated as 2.89 ((${\pm}1.59$) from the calf housing and 6.51 ((${\pm}3.67$) kg-$NH_3$ animal$^1\;yr^1$ from the cattle housing.

축산분뇨에서 발생하는 암모니아 플럭스에 대한 환경인자의 영향에 관한 연구

사재환(Jae-Hwan Sa) 한국대기환경학회 2010 한국대기환경학회지 Vol.26 No.4

냉각응축방식을 이용한 주유소 저장시설의 VOCs 제거

사재환(Jae-Hwan Sa),전의찬(Eui-Chan Jeon),이정우(Jeong-Woo Lee),김승진(Seung Jin Kim),한장희(Jang-Hui Han) 한국환경관리학회 2013 環境管理學會誌 Vol.19 No.1

본 연구는 냉각응축방식의 유증기 회수시설을 이용하여 주유소 저장시설에서의 VOCs 제거 특성을 평가하였다. 주유소 저장시설에서는 벤젠(2,479.1 ∼ 3,125.6 ㎎/㎥)과 톨루엔(766.5 ∼ 1,118.6㎎/㎥)이 가장 높은 농도로 배출되고 있는 것으로 조사되었다. 유증기 회수시설의 의 운전조건에 따라 VOCs별로 제거효율은 88.5 ∼ 98.7 %의 차이를 보였으며, 특히, 벤젠과 톨루엔은 운전조건에 따라 큰 제거효율의 차이를 보였다. 그리고 동일한 처리유량에서 처리온도가 낮을수록 VOCs별 처리효율의 표준편차가 크게 발생하는 것으로 조사되었다. Cooled condensing unit using removal efficiency of VOCs from gasoline reservoir was evaluated. Benzene(2,479.1 to 3,125.6 ㎎/㎥) and toluene (766.5 to 1,118.6 ㎎/㎥) showed the highest concentrations being discharged into the gas station storage reservoir. The removal efficiency of VOCs showed 88.5 to 98.7% by operating condition of cooled condensing unit. In particular, Removal efficiency of benzene and toluene were showed a high difference on the operating conditions. And a greater standard deviation of each VOCs removal efficiency was produced at lower temperature condition within the same processing flow.

연구논문 : 소사육시설에서 가을철과 겨울철의 암모니아 플럭스 및 배출계수 산정에 관한 연구

사재환 ( Jae Hwan Sa ),전의찬 ( Eui Chan Jeon ) 한국환경영향평가학회 2010 환경영향평가 Vol.19 No.1

가스상 암모니아 측정을 위한 분석방법별 특성 연구

사재환(Jae-Hwan Sa),윤석경(Seok-Kyung Yoon),노기환(Gi-Hwan Roh),전의찬(Eui-Chan Jeon) 한국대기환경학회 2008 한국대기환경학회지 Vol.24 No.1

Management and control of ammonia at the sources and ambient largely depend on sampling and measurement techniques. Good sampling and measurement techniques provide high quality data. The main purpose of the study is compare the analytical characteristics of the Indolphenol method which is one of the standard method in Korea with automatic analyzers for continued measuring gaseous ammonia. For comparison with other analytical methods, the verification test was designed to evaluate performance parameters; linearity, absorption efficiency, reproducibility and repeatability test, accuracy, and response time test. R² of calibration curve using IPM and CLM was very high (value is 1.000), but for EcSM R² value was estimated to be lower than IPM and CLM (as 0.991). The RSD of the CLM ranged from 0.1 to 2.3% over the nine concentration levels measured, %Ds was 0.1 to 10.7%, and average RA over all the measurements was 3.3%. The RSD of IPM and EcSM was ranged from 1.0 to 8.1, 3.9 to 14.0 respectively, and average RA were 8.71, 4.9% respectively. Rise in response times of EcSM was estimated to be 1 minute. It is found to be more sensitive than response time (which ranged from 2 to 9 minute) of CLM. For ammonia concentration measured using the IPM and the CLM from the same ammonia source, linear regression of IPM versus CLM show a slope of 0.805, an intercept of 637 ppb, and R² of 0.868.

연료와 CO₂ 농도분석을 이용한 아역청탄 화력발전소의 온실가스 배출계수 개발

전의찬,사재환,Jeon, Eui-Chan,Sa, Jae-Hwan 한국환경보건학회 2010 한국환경보건학회지 Vol.36 No.2

The main purpose of this study was to develop the greenhouse gas emission factor for power plant using sub-bituminous coal. In Korea, Fired power plant are a major source of greenhouse gases within the fossil fuel combustion sectors, thus the development of emission factors is necessary to understand the characteristics of the national specific greenhouse gas emission and to develop nation specific emission factors. These emission factors were derived from the $CO_2$ concentrations measurement from stack and fuel analysis of sub-bituminous coal. Caloric value of sub-bituminous coal used in the power plants were 5,264 (as received basis), 5,936 (air-dried basis) and 6,575 kcal/kg (dry basis). The C emission factors by fuel analysis and $CO_2$ concentration measurement was estimated to be 26.7(${\pm}0.9$), 26.3(${\pm}2.8$)tC/MJ, respectively. Our estimates of C emission factors were comparable with IPCC default value.

대기오염물질 건성침적의 시ㆍ공간적 특성평가

노기환(Gi-Hwan Roh),전의찬(Eui-Chan Jeon),사재환(Jae-Hwan Sa) 한국환경관리학회 2001 環境管理學會誌 Vol.7 No.1

소사육 축산시설에서의 암모니아 플럭스 배출 특성

노기환(Gi-Hwan Roh),사재환(Jae-Hwan Sa) 한국환경관리학회 2013 環境管理學會誌 Vol.19 No.1

암모니아는 대기환경에 많은 영향을 미치는 중요한 오염물질이며, 악취 유발 및 동물과 인간의 건강에 영향을 미칠 수 있는 가스상 물질이다. 우리나라의 암모니아 주요 배출원은 축산과 농업부문이다. 본 연구에서는 소사육시설에서 발생하는 암모니아 플럭스를 평가하기 위하여 열린 챔버를 적용하여 가을철과 겨울철에 실시하였다. 그리고 암모니아 영향인자인 기온, pH, 암모늄이온을 측정하였다. 가을철 낮시간대와 밤시간대의 암모니아 평균 플럭스는 1.360(±0.667), 0.932(±0.686) ㎎ m<SUP>-2</SUP>min<SUP>-1</SUP> 이며, 겨울철에는 각각 1.189(±0.501), 0.649(±0.410) ㎎ m<SUP>-2</SUP> min<SUP>-1</SUP>으로 산정되었다. 가을철과 겨울철의 암모니아 플럭스는 각각 1.146(±0.662), 0.919(±0.456) ㎎ m<SUP>-2</SUP>min<SUP>-1</SUP>으로 산정되었다. 그리고 암모니아 플럭스와 암모늄이온과의 상관성은 분뇨의 pH와의 상관성에 비해 다소 높은 상관성을 보였다. Ammonia(NH3) is an important pollutant that plays a key role in several air pollution problems. It can create odors and have negative impacts on animal and human health. The largest source contributing to ammonia emission is the agricultural production, in particular animal operation, in Korea. This study evaluated flux profiles of ammonia emitted from the cattle housing using a dynamic flux chamber. Ammonia flux variation was made with respect to manure surface temperature, pH, and ammonium concentration. Ammonia flux have been measured from at cattle housing in Fall to Winter season. In the fall season, ammonia flux day time and night time from cattle housing was estimated 1.360(±0.667), 0.932(±0.656) ㎎ m<SUP>-2</SUP> min<SUP>-1</SUP>, respectively. and In the winter, ammonia flux day time and night time from cattle housing was estimated 1.189(±0.501), 0.649(±0.410) ㎎ /㎡/min¹, respectively. And ammonia flux of fall and winter season was estimated 1.146(±0.662), 0.919(±0.456) mg m<SUP>-2</SUP> min<SUP>-1</SUP>, respectively. The coefficient of correlation between ammonia flux and manure surface ammonium concentration showed a stronger relationship than surface pH of manure .

닫힌 챔버법을 이용한 폐수처리장의 온실가스 플럭스 측정 및 배출량 산정

노기환(Gi-Hwan Roh),사재환(Jae-Hwan Sa) 한국환경관리학회 2015 環境管理學會誌 Vol.21 No.1

본 연구는 닫힌 챔버법을 이용하여 제지, 식품, 화학, 금속산업의 폐수처리장에서 발생하는 메탄 플럭스와 배출량은 산정하였으며, 메탄의 분석은 GC-FID를 이용하였다. 폐수처리장의 메탄 플럭스는 처리공정별 계절별로 큰 차이를 보이는 것으로 평가되었다. 제지, 식품, 화학산업 폐수처리장은 농축주에서 가장 높은 메탄플럭스를 보였으나, 금속산업 폐수처리장은 1차 침전지에서 가장 높게 평가되었다. 여름철, 가을철, 겨울철 평균 메탄 플럭스는 각각 416.6, 111.9, 65.1 mg/㎡/hr로서 여름철이 가장 높았다. 그리고 여름철의 평균 메탄 배출량은 1,416.6 d/day, 가을철과 겨울철은 각각 387.7, 215.8 d/day로 산정되었다. Purpose of the study was to investigate the characteristics of CH₄ emission in the wastewater treatment process from the Paper & pulp, food, Chemical product, basic metals industry. Methane flux from wastewater treatment process was measured using closed flux chamber. Analysis of CH₄ concentration from the wastewater treatment process was used GC-FID. In the study, results showed that the CH₄ fluxes were remarkably difference for each wastewater treatment process and season. CH₄ flux from treatment process of paper & pulp, food, chemical was investigated in the Thickener. Average CH₄ flux of summer, fall, winter have been measured 416.6, 111.9, 65.1 mg/㎡/hr, respectively. CH₄ emission in the summer was estimated average 1,416.6 g/day, In the fall and winter was estimated 387.7 and 215.8 d/day, respectively.

바이오매스 발전소 연료한계단가 분석

김철(Kim, Cheol),사재환(Sa, Jae-Hwan),김윤성(Kim, YunSoung),전의찬(Jeon, Eui-Chan) 한국기후변화학회 2010 한국기후변화학회지 Vol.1 No.3