축산악취를 대상으로 직접관능법인 격자법과 Passive Air Sampler측정 결과의 비교연구

오제범,김형석,김자영,김선태,홍성주,조강희 한국냄새환경학회 2019 실내환경 및 냄새 학회지 Vol.18 No.3

Since the implementation of the Odor Prevention Act in 2005, the number of odor complaints has continuously increased due to the increased interest in the living environment. The current odor control means is a concentration-based method for the source of odor. That is why there is a difference between the odor sensitivity and the result of the odor measurement in the odor damage area. The government is considering the introduction of the grid method, which is the odor management method of Germany, as the method of odor investigation in the odor damage area in the second comprehensive Odor Prevention Policy (2019-2028). The grid method is receptor-based odor measurement method that investigators use to judge odors in the field, task that expensive and requires substantial manpower and time. To study an odor measurement method that is suitable for domestic conditions, this study compared the correlation between results based on the odor frequency concept grid method around the livestock facilities and the result of ammonia concentration measured by passive air sampler. The correlation coefficient (R) that is between the frequency of odor per spot for the entire odor and the ammonia concentration that was measured by passive air sampler was 0.65 which is relatively good. Among the entire odor detected by the grid method, the correlation coefficient (R) between the odor frequency selected only for livestock odor and the ammonia concentration was significantly increased to 0.80. In addition, the correlation between odor exposure (ECPexist) and the ammonia concentration for the overall odor was 0.81 (linear) and 0.86 (index). If only the livestock odors were selected, the correlation between odor exposure and the ammonia concentration was very high at 0.96 (linear) and 0.95 (index).

공공환경시설 악취발생원의 악취물질 누출량 평가에 관한 연구

오제범,조강희,강동규,손창영,심동민,김자영 한국냄새환경학회 2020 실내환경 및 냄새 학회지 Vol.19 No.1

Most of the odorous substances generated in public environment facilities are treated using a local exhaust ventilation system. This study assessed the leakage of odorous substances by measuring design criteria, collected air volume, and complex odor in the unit process of sewage treatment facilities. The closer the guideline/design operation airflow ratio of each odor source is to 1.0, the more identical the guideline:design:operation airflow. The average air volume ratio of the facilities under the study was 0.95~0.99 for the MBR process and 0.29~0.68 for the BNR process. As a result of comparing the types of wastewater treatment processes, the leakage of odorous substances was about 9.7 times higher in the BNR process (192,732 m3/min) than in the MBR process (19,838 m3/ min). In this study, it was found that the following two means are important for the proper collection and prevention of odorous substances. The first is the estimation of collection air volume with consideration to the characteristics of the odor source (temperature, odor generation condition, etc.). The second is the design and operation of the local exhaust ventilation system.

굴뚝 배출가스 유량측정 상대 정확도 시험 방법 간소화 제안(연료 성상에 따른 배출가스 밀도 측정 방법을 중심으로)

오제범,임만규,송선희,김경태,심은혜,송병선,윤영봉,신지선 한국대기환경학회 2022 한국대기환경학회 학술대회논문집 Vol.2022 No.10

고농도 악취처리를 위한 실규모 바이오필터 습식전처리 적용성 연구

오제범,방현홍,양경환,장현섭,김선태 한국냄새환경학회 2021 실내환경 및 냄새 학회지 Vol.20 No.4

In this study, the removal performance of high-concentration H2S and complex odors was evaluated for bio-filters installed in sewage treatment plants and manure treatment plants. The amount of odor generation according to temperature was found to be higher in summer than in spring. It was found that the longer the empty bed retention time of the bio-filter, the higher the odor removal efficiency. Therefore, in order to effectively remove odors, it is necessary to maintain a sufficiently long residence time when designing a bio-filter. In addition, a case in which a bio-filter and a wet pre-treatment system were combined to remove high-concentration odors was studied. The result showed that the wet pre-treatment was effective in removing high-concentration odors. In particular, most of the hydrogen sulfide could be adequately removed by wet pre-treatment.

공공환경시설 개구부의 기류 유입속도에 따른 악취물질농도 특성

이경호,오제범,동종인 한국냄새환경학회 2020 실내환경 및 냄새 학회지 Vol.19 No.3

The effect of the change in air inflow velocity has been investigated at the opening of the malodor emission source to determine its influence on the Complex odor concentration. Both the Complex odor collection efficiency and concentrations were measured according to the change in airflow velocity. When the air inflow velocity was 0.1 m/s, it was observed that some of the generated gas streams were diffused to the outside due to low collection efficiency. In contrast, only the increased gas collection volume up to 0.5 m/s showed no substantial reduction of the Complex odor concentration, which indicates an increase in the size of the local exhaust system as well as the operation cost for the Complex odor control device. When the air inflow velocity reached 0.3 m/s, the Complex odor concentrations not only were the lowest, but the odorous gas could also be collected efficiently. The air inflow velocity at the opening of the malodor emission source was considered the key factor in determining the gas collection volume. Therefore, based on the results of this study, an optimal air inflow velocity might be suggestive to be 0.3 m/s.

폐플라스틱 재활용 시설의 악취발생 특성

정주영,박정구,최일배,오제범,김수겸,김경연 한국냄새환경학회 2010 실내환경 및 냄새 학회지 Vol.9 No.1

폐플라스틱의 물질재활용 방법 중 하나인 열분해 용융과정에서 발생되는 가스와 흄은 인체에 해로울 수 있고, 또한 사업장 인근 지역으로 확산되어 악취 민원을 유발시키고 있다. 본 연구는 국내 일부 폐플라스틱 재활용 사업장을 대상으로 용융과정에서 발생되는 악취물질의 배출특성을 조사하여 적절한 관리방안 마련을 위한 기초 자료를 제공하는 것을 목적으로 한다. 용융과정 중 발생된 악취농도는 조사대상 사업장별로 큰 차이를 보였는데, 이는 용융온도와 원료의 이물질 오염상태에 기인된 것으로 조사되었다. 특히 용융온도가 320°C로 유지될 경우 복합악취농도가 100,000배를 초과하는 사업장도 확인되었다. 한편, 용융온도를 감소시키면 배출되는 악취농도도 비례하여 급감하는 것이 실험적으로 증명되었다. 일부 사업장에서 채취한 배출가스를 정성⋅정량 적으로 분석한 결과에서는 황화합물, 알데하이드, VOCs 등의 지정악취물질이 고농도로 측정되었을 뿐만 아니라 페놀 및 시클로헥산과 같은 냄새 유발물질이 다수 검출되었다. 다양한 악취물질과 함께 배출되는 점액성 타르물질은 기존 악취방지시설의 운영에 많은 문제점을 야기할 수 있으므로 폐플라스틱 재활용 시설의 적정 방지시설은 직접연소산화장치가 가장 효과적이고, 또한 악취물질과 타르의 연소과정에서 발생되는 폐열을 용융설비의 열원으로 활용하면 경제적 운영이 가능하다. Odorous compounds emitted from the melting process for material recycling of plastic have an effect on the sensory annoyance to the nearby residents. The objective of this study was to investigate emission characteristics of malodor in the domestic plastic recycling plants. The olfactometric results showed that the odor concentration among the surveyed plants were significantly different, depending on the melting temperature and material sources. The higher melting temperature led to the higher odor concentration. In particular, as for a plant where melting temperature was 320°C, the odor concentration exceeded 100,000 dilution ratio. However, as the temperature was reduced, the odor emission decreased gradually. This result indicates that reduction of the melting temperature is effective measure to decrease the emission of odor compounds. Quantitative and qualitative analysis of odorous compounds showed that regulatory odor substances such as sulfur compounds, aldehydes and VOCs were found with high concentration in the exhausted gases. Liquid tar in the exhausted gases makes it difficult to remove odorous compounds with traditional odor control devices. In order to eliminate both odorous compounds and liquid tar effectively, a combustion method is strongly recommended in these plants.

양돈시설에서 발생하는 악취특성에 관한 연구

김재혁(Jae Hyuck Kim),유경선(Kyung Seun Yoo),오제범(Je Beom Oh),정주영(Ju Young Jung) 大韓環境工學會 2012 대한환경공학회지 Vol.34 No.7

실제운영 중인 40여개 양돈시설을 대상으로 사육밀도, 경영방식, 돈사환기방식, 돈분뇨 처리방식 및 악취저감제 적용특성 등의 관리현황을 파악하고 관능평가 및 악취물질 분석을 통하여 양돈시설에서 발생하는 주요 악취유발물질과 악취발생 특성을 파악하고자 하였다. 양돈시설 악취발생원 중 악취농도(복합악취)는 액비화시설(포기 상태)(평균 4,055배) > 분뇨집수조(평균 913배) > 비육사(평균 506배) > 퇴비화시설(평균 201배) 순으로 조사되었다. 비육사의 경우 슬러리 피트 내부의 돈분뇨적체높이가 높아질수록, 사육밀도가 높을수록 발생하는 악취수준이 높은 것으로 조사되었으나, 사료첨가 유무에 따른 악취는 큰 차이를 보이지 않았다. TMA를 제외한 9종의 악취물질(NH₃와 H₂S, MM, DMS, DMDS, PA, n-BA, n-VA, i-VA)이 돈사와 분뇨저장조 및 퇴비화시설에서 검출되었으며, 악취기여도가 높은 물질은 H₂S, MM 등의 황화계열물질과 n-BA, n-VA, i-VA 등의 휘발성 지방산류이었다. 조사 대상 양돈시설의 97.5%가 주거지역과 300 m 이내에 위치하고 있어 악취민원 발생에 취약한 것으로 조사되었다. We studied the characteristics of odor emitted from 40 swine facilities across the country under various conditions like rearing densities, management style, ventilation system and swine manure handling characteristics, based on the olfactory and analytical evaluation. Odor concentrations (D/T) measured from swine facilities were respectively an average 4,055 D/T at liquid manure storage tanks on aeration, an average 913 D/T at slurry manure storage, an average 506 D/T at finishing swine facilities and an average 201 D/T at composting facilities. The higher rearing densities and slurry accumulation volume in finishing swine house, the more odor concentration (D/T) was increased, But The odor concentration (D/T) in finishing swine house did not show significant difference according to application of microbial additives. 9 odor compounds (NH₃, H₂S, MM, DMS, DMDS, PA, n-BA, n-VA, i-VA) were detected at swine facilities and the main odor compounds were volatile sulfur compounds such as H₂S, MM and volatile fatty acids compounds such as n-BA, n-VA, i-VA. 97.5% of swine farms surveyed in this study is located within 300 m of residential area and it is easy to bring odor complaints.