간행물
한국냄새환경학회지 KCI 등재 Journal of Korean Society of Odor Research and Engineering
- 발행기관 한국냄새환경학회
- 자료유형 학술지
- 간기 계간
- ISSN 1598-6616 (Print)2287-6731 (Online)
- 수록기간 2002 ~ 2013
- 주제분류 공학 > 환경공학 공학 분류의 다른 간행물
- 십진분류KDC 539DDC 628
권호리스트/논문검색
제5권 제1호 (2006년 3월) 8건
1.
2006.03
구독 인증기관 무료, 개인회원 유료
Odor emission characteristics of unit processes in 10 livestock farms and 3 manure treatment facilities in Kyonggi province were examined in terms of odorous compound concentration and dilution ratio values of the threshold limit measured by instrumental analysis and air dilution sensory test, respectively. The highest odor concentration was detected at the compositing process unit of each facility and the dilution ratio showed high correlation with the treatment capacity as well as hygiene of the facility. Odor intensities in some facilities showed severe fluctuations (10 to 27 times difference) in response to the wind speed and direction as well as other weather conditions. According to the instrumental analysis, the major odorous compounds in the research area appeared to be ammonia, hydrogen sulfide, trimethyl amine, acetaldehyde and carbonyl compounds. Although some facilities breed same livestock, the types of odorous compounds as well as their concentration profiles were dependent on the type of composting process and management skill. In addition, dilution ratio of the threshold limit did not always show positive correlation with the odorous compound concentrations, which indicates the necessity of applying both methodologies, sensory test, and instrumental analysis.
4,000원
2.
2006.03
구독 인증기관 무료, 개인회원 유료
Odor emission effects of unit processes in 10 livestock farms and 3 manure treatment facilities in Y and I cities, Kyonggido, were simulated using puff model after the odor emission rates were measured. 2 degree level of odor intensity and 1 degree level of it were predicted by the puff model in the adjacent area of odor emission source and within the 8km radius range of it, respectively. As real time odor modelling system was operated at specific manure based fertilizer making facility located in Y city, the highest odor concentration was predicted at the entrance of that facility and relatively lower odor intensity was estimated at the place more or less be aparted from the emission sources. The higher odor intensity was evaluated at dawn and evening because the odor was accumulated in case of stable air condition.
4,000원
3.
2006.03
구독 인증기관 무료, 개인회원 유료
In this work, an attempt is made to understand the actual conditions of malodor occurrence for industrial complex area and to settle trouble for a odor complaint. Odor emission sources were sorted into point source and area source group. The odor concentration unit (o.u/㎥) of each major odor emitting industry was actualized by the indirect olfactory method including air dilution sensory test method in Korea and triangle odor bag method in Japanese. As the results, Night-soil disposal plant were measured by the highest of 2,097,992.6 o.u/㎥, and wastewater incinerator plant was analyzed by 315,022.5 o.u/㎥, and food company was analyzed by 210,864 0.u/㎥, and paper products plant was detected by 195,525 o.u/㎥ and chemical product was detected by 13,761.6 o.u/㎥. To evaluate how well the evaluation result of odor made by induced odor concentration (o.u/㎥) can explain the actual odor phenomenon, it was used as the input data of air pollutant diffusion model (ISCST 3) to set model operation time as one hour in consideration of the characteristics odor varying with weather condition at any time. It was confirmed that 2.0 degree of odor intensity could be detected at the neighboring area of industry complex area and 1.7 degree of odor intensity could be detected at the neighboring domestic area. Accordingly, the evaluation result by induced odor concentration (o.u/㎥) could precisely explain the current status of the field with odor problem and sufficiently be used as inputting data for air pollutant diffusion model.
4,000원
4.
2006.03
구독 인증기관 무료, 개인회원 유료
This study estimated the emission characteristics of odorous volatiles organic compounds (VOCs) from major 7 emission facilities by industrial classification in Yeosu petrochemical industrial complex. This study investigated terminal emission facilities (Inlet and outlet) in the industrial plant area, the plant boundary area and Samil-dong which has many civil appeal for an offensive odor to grasp VOCs concentration in ambient air of the plant boundary area and civil appeal area from May, 2002 to December, 2004, besides. VOCs were sampled 6 L using silicocan canisters and toluene, xylene and styrene which are known as odorous VOCs were analyzed by cryogenic preconcentration system and GC/MS. The removal efficiency of emission facilities in the industrial plant area for odor showed 96.5% of wet scrubber, 89.5% of RTO and 86.0% of RCO. The concentration of odorous VOCs at the plant limits area in 2003 were higher than 2002. The reason was guessed that toluene of high concentration emitted from terminal emission facilities in the industrial plant area influenced on ambient air at the plant boundary area. The concentration of odorous VOCs in ambient air at Samil-dong were decreasing from 1995 to 2001, but the concentration of toluene sharply increased from 2002. The reason was presumed that VOCs emission increased due to expansion of Yeosu petrochemical industrial complex and removal efficiency of terminal emission facilities dropped due to outworn equipments for VOCs prevent.
4,000원
5.
2006.03
구독 인증기관 무료, 개인회원 유료
In this study, the odor compounds emitted from the field workplaces at the Pohang steel complex were measured using analytical instruments and the olfactory method. In addition, the reduction of odor emissions by pyroligneous liquid was evaluated. The odor samples were obtained from slag pots and dry pits, which refrigerate hot slag, and the target compounds were hydrogen sulfide (H₂S) and ammonia (NH₃). The levels of odor emissions varied with meteorological and operating conditions, but emissions from dry pits were always much higher than those from slag pots. As the concentration of pyroligneous liquid increased, the concentrations of H₂S and the ratios of dilution decreased. Together with this result and the guideline of odor emissions, the increase of pyroligneous liquid (more than 2.5 times) in cooling water was suggested to reduce odor emissions. Actually, the reduced levels of H₂S at the slag pot and the dry pit were observed (70 and 94%, respectively) after the increased amount of pyroligneous liquid. However, in order to determine the optimal amount of pyroligneous liquid for the economical and efficient removal of odor emissions, the system of cooling water has to be improved and more samples are required for a comprehensive analysis.
4,000원
6.
2006.03
구독 인증기관 무료, 개인회원 유료
The purpose of this project is to develop the VOCs (the Volatile Organic Compounds) controlling process. In order to achieve our goal, we practiced with non-membrane electrolysis water for absorption scrubbing water. Non-membrane electrolysis system is produced to use absorption scrubbing water. And also this procedure obtains electrolysis water using electrolyte (20% of NaCl-sol). For absorption efficiency, it can be divided into two different types of Multi-Scrone (the vortex absorption tower). One is in a Laboratory scale and the other is in Pilot Plant scale. In Laboratory scale, it shows a difference from 20% of NaCl-sol in order. We also learned that the sudden change of ORP at the first stage gives such a big influence to velocity in process. The vortex absorption tower has better efficiency than packed tower. In spite of that fact, we all know BTX (insoluble organic compounds) has lower absorption efficiency. It is also confirmed in the vortex absorption tower. This project makes our future research strong enough to remove Odor and VOCs only with absorption scrubbing technique. Furthermore, this reference will help our research to develop electrolyte and improve absorption efficiency of BTX as well.
4,000원
7.
2006.03
구독 인증기관 무료, 개인회원 유료
In this study, we identified the odor active compounds among MVOCs (Microbial Volitile Organic Compounds) emitted from Geotrichum sp. which was previously identified as the main kinds of mold in indoor air. To sample the odor active compounds emitted from Geotrichum sp. while metabolizing, head space-solid phase microextraction (HS-SPME) method, which is well known for sampling odorants, was used.
GC/Flame Ionization Detector/Olfactometry was used to identify main odor active compounds. GC/Atomic Emission Detector was used to identify if some compounds had atoms like oxygen, nitrogen, sulfur which are typically found from odorants. GC/Mass Spectrometry was used to identify the odorants. Finally, Retention Index (RI) of each system was verified. In this study, hydrogen sulfide, methanthiol, 1-butanol, carbon disulfide, dimethyl sulfide, dimethyl disulfide, S-methyl thiobutyrate, dimethyl trisulfide, geosmin were identified as MVOCs. Among them, identified main odor active compounds were dimethyl disulfie and dimethyl trisulfide which induce ordure smell and geosmin which induce moldy, earthy smell.
4,000원
8.
2006.03
구독 인증기관 무료, 개인회원 유료
Recently, a bioactive foam reactor (BFR) using a surfactant and suspended microorganisms has been suggested as an suitable alternative to conventional packed-bed biofilters. This study was conducted to demonstrate the feasibility of applying the BFR using styrene as a model compound and investigate the effect of the gas residence time on mass transfer and biodegradation rates. At a gas residence time of 40 seconds, the BFR achieved high styrene removal efficiencies greater than 80%, but the biodegradation rate controlled the overall efficiency as the styrene inlet concentration increased. Meanwhile, at a gas residence time of 20 seconds, the change of the styrene removal efficiency was less sensitive to the inlet styrene concentration, indicating the BFR system was operated under the mass transfer limited condition. Therefore, the mass transfer rate needs to balance with the biodegradation rate in the BFR system, and the foam stability had a significant effect on the mass transfer. In the BFR, the maximum elimination capacity was found to be 117 g/㎥/hr, which was higher than those reported in the literature. This finding indicates that the BFR can be an efficient method for the treatment of various VOCs and expand an application range of biological processes.
4,000원
