• 한국대기환경학회지
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• 제21권2호
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• pp.215-226
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• 2005

In this study, we investigated the emission concentrations of 31 odorous compounds from various emission sources of 37 individual companies located within the Ban Wal industrial complex of Ansan city, Korea. In the course of our study, we attempted to evaluate emission characteristics of different industrial activities and relative significance of different odorous components . Based on our measurements of odorous compounds, we were able to find a line of evidence to draw a conclusion that a number of odorous compounds can be used as indices to specifically point out the influence of certain industrial activities. It was found that hydrogen sulfide and trimethyl amine record the highest contribution from leather industry. Likewise, acetaldehyde showed its maximum contribution from food-beverage sector, while ammonia for paper-mill, pulp production sector. On the other hand, the results of styrene and most YOC including BTEX were not useful, as their concentrations were not significantly high enough to judge from such respect.

• 한국토양환경학회지
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• 제4권1호
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• pp.85-96
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• 1999

퇴비를 충전물질로 사용한 생물탈취상으로 난지도매립지에서 발생되는 매립지가스 처리시 악취유발물질 및 휘발성 유기화합물의 제거특성과 생물탈취상의 적용가능성을 평가하고자 하였다 본 연구는 난지도매립지 상부에서 실시하였으며 충전물질로는 난지도퇴비화시범시설에서 생산된 퇴비를 사용하였다. 약 15ppmv로 유입된 황화수소는 25cm충전깊이에서도 98%이상 제거되었으며 산소공급중단 후 혐기성가스만 유입시에는 처리효율이 30%로 저하하였다. 평균유입농도 40ppmv에서의 암모니아 제거 효율은 85%정도이었다. BTEX중 톨루엔과 에틸벤젠의 제거효율은 80%로 벤젠과 자일렌보다 높았다. 수분손실은 가스유입구에서 가장 높게 나타났으며 약 30일 운전기간 동안 pH저하에 의한 산성화는 발생하지 않았다.

• 한국대기환경학회지
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• 제24권6호
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• pp.674-681
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• 2008

Silver as a metal catalyst has been used to remove odorous compounds. In this study, silver particles in nano sizes ($5{\sim}30nm$) were prepared on the surface of $NaHCO_3$, the supporting material, using a sputtering method. The silver nano-particles were dispersed by dissolving $Ag-NaHCO_3$ into water, and the dispersed silver nano-particles in the aqueous phase was applied to remove inorganic odor compounds, $NH_3$ and ${H_2}O$, in a scrubbing reactor. Since ammonia has high solubility, it was removed from the gas phase even by spraying water in the scrubber. However, the concentration of nitrate (${NO_3}^-$) ion increased only in the silver nano-particle solution, implying that the silver nano-particles oxidized ammonia. Hydrogen sulfide in the gas phase was rapidly removed by the silver nano-particles, and the concentration of sulfate (${SO_4}^{2-}$) ion increased with time due to the oxidation reaction by silver. As a result, the silver nano-particles in the aqueous solution can be successfully applied to remove odorous compounds without adding additional energy sources and producing any harmful byproducts.

• 대한환경공학회지
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• 제30권4호
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• pp.415-422
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• 2008

충주시에 소재하는 주요 환경시설로부터 배출되는 악취성 물질의 배출특성을 주민 민원에 대한 설문과 정치형 시료채취기를 활용하여 조사하였다. 네 군데의 조사시설 가운데 분뇨처리장이 가장 높은 악취농도를 보여주었다. 악취성물질의 주요 성분은 황화합물, 트리메칠아민, 알데히드 등이었다. 음식물 쓰레기 처리공정은 황화합물과 알데히드를 많이 배출하였다. 도시하수처리장은 고농도의 알데히드를 배출하는 것으로 나타났다. 악취의 관능 수준은 기상여건에 따라 다양하였으며, 심야의 악취 강도가 주간보다 훨씬 심각하게 나타났다.

• 한국초지조사료학회지
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• 제33권4호
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• pp.252-256
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• 2013

본 연구는 양돈 슬러리의 악취물질 감소에 효과가 있는 것으로 확인된 물질의 효능을 비교분석하기 위하여 수행되었다. 페놀류 농도는 고추냉이와 아몬드피 구에서 낮았고, 인돌류 농도는 아몬드피 구에서 가장 낮았다(p<0.05). 따라서 슬러리에 아몬드피를 첨가하면 VOC 농도가 감소되었다. SCFA 농도는 팽이버섯폐배지와 아몬드피 구에서 높았고, BCFA 농도는 대조구에 비해 다른 모든 처리구에서 낮았다(p<0.05). 또한 슬러리의 pH는 팽이버섯폐배지와 아몬드피 구에서 낮았다(p<0.05). 따라서 팽이버섯폐배지 또는 아몬드피를 슬러리에 첨가하면 SCFA 농도는 증가되고 BCFA 농도는 감소되는 것으로 나타났다.

• Journal of Animal Science and Technology
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• 제59권12호
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• pp.28.1-28.8
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• 2017

Background: Major amino acids in pig diets are Lys, Met, Thr, and Trp, but little is known about the requirements for the other essential amino acids, especially on odorous compounds and microbial characteristics in feces of growing-finishing pigs. To this end, different levels of amino acid composition added to diets to investigate the effects of amino acid composition on microbial characteristics and odorous compounds concentration. Methods: A total eight (n = 8) barrows (Landrace ${\times}$ Yorkshire ${\times}$ Duroc) with an average bodyweight of $89.38{\pm}3.3kg$ were individually fed diets formulated by Korean Feeding Standards 2007 (old version) or 2012 (updated with ideal protein concept) in metabolism crates with two replication. After 15-day adaptation period, fresh faecal samples were collected directly from pigs every week for 4 weeks and analysed for total volatile fatty acids (VFA), phenols and indoles by using gas chromatography. The nitrogen was determined by Kjeldahl method. Bacterial communities were detected by using a 454 FLX titanium pyrosequencing system. Results: Level of VFA tended to be greater in 2012 than 2007 group. Among VFAs, 2012 group had greater (p < 0.05) level of short chain fatty acids (SCFA) than control.Concentration of odorous compounds in feces was also affected by amino acid composition in pig diet. Levels of ammonium and indoles tended to be higher in 2012 group when compared with 2007 group.Concentration of phenols, p-cresol, biochemical oxygen demand, and total Kjeldahl nitrogen, however, were lower (P < 0.05) in 2012 treatment group compare to 2007. The proportion of Firmicute phylum were decreased, while the Bacteriodetes phylum proportion increased and bacterial genera includingCoprococcus, Bacillus, and Bacteroides increased (p < 0.05) in 2012 compare to 2007 group. Conclusion: Results from our current study indicates that well balanced amino acid composition reduces odor by modulating the gut microbial community. Administration of pig diet formulated with the ideal protein concept may help improve gut fermentation as well as reduce the odor causing compounds in pig manure.

• 한국환경과학회지
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• 제14권1호
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• pp.81-89
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• 2005

As a typical example of simultaneous analysis of the odorous compounds, the volatile organic compounds from inventory sources in Seongseo industrial area were concentrated and analyzed with thermal desorber/GC/MSD, and major malodorous compounds were estimated. Odor intensity and odor concentration was analyzed simultaneously During a period from November in 2002 to December in 2003, this study was conducted to evaluate malodor emission characterization in major treatment facilities. The major components were Dimethyl sulfide, Dimethyl disulfide, Methyl mercaptane, Ammonia, Benzene, Toluene, m,p-xylene, o-xylene, Styrene, 1,2,4­T.M.B and 1,3,5-T.M.B. Among the six major inventory sources, the odor unit concentration of Night-soil disposal facilities was the highest, $669\~2344\;ou/m^{3}.$

• 환경위생공학
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• 제22권2호
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• pp.35-40
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• 2007

It disposes positively in the air pollution damage which is serious, in order help period the place where it improves the quality of existence and life of the local residents. It removed the offensive odor regulation material and the technique it will be able to prevent to sleep it researched it did. After scattering the GNC solution which develops the offensive odor regulation material which occurs from the food and trash treatment plant which is located to the S from the H, company after scattering the GNC solution which it develops collection it did a control criminal record control kind air and it analyzed. In this study, we investigated the emission concentrations of offensive odorous compounds of hydrogen sulfide, methyl mercaptan, dimethyl sulfide and dimethyl disulfide, trimethylamine, formaldehyde, acetaldehyde, propionaldehyde, buthylaldehyde, iso-valeric aldehyde, n-valeric aldehyde, ammonia. The concentrations of odorous compounds are determined by gas chromatography, HPLC and uv-vis spectroscopy. Hydrogen sulfide, methyl mercaptan, dimethyl sulfide and dimethyl disulfide were not detected at any point examined.

• 한국폐기물자원순환학회지
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• 제34권2호
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• pp.140-147
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• 2017

This study was conducted to evaluate the effects of physical characteristics. Twelve specific odorous compounds and various sources of bacteria were tested via treatment of food waste using an ultra-thermophilic aerobic composting process. Food waste was mixed with seed material and operated for 47 days. During composting, the temperature was maintained at $80-90^{\circ}C$. The variations in $O_2$, $CO_2$ and $NH_3$ production suggested typical microorganism-driven organic decomposition patterns. After composting, the concentrations of 12 specific odorous compounds other than ammonia did not exceed the allowable exhaust limits for odor. After composting, thermophiles represented 50% of all bacteria. After composting, the percentage of thermophile bacterial increased by 15%. Therefore, both stable composting operation and economic benefit can be expected when an ultra-thermophilic composting process is applied to food waste.

• 환경위생공학
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• 제13권1호
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• pp.1-8
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• 1998

Musty-odorous compound (Geosmin, 2-Methylisobrneol) 수용액 중에 초음파 (200kHz, $6.0W/cm^{2}$)를 조사시켜 조사시간에 따른 농도 및 취기의 변화를 고찰했다. 초음파 조사에 의해 이 물질들은 빠르게 분해되었고 분해 형태는 농도에 대한 유사1차 반응을 나타내었다. 공기 포화 분위기에서 이들의 초기 분해속도는 각각 2.5 $10^{-3}{\;}Msec^{-1}$(2-MIB), 3.2 $10^{-3}{\;}Msec^{-1}$ (Geosmin)로 나타났다. 초음파 조사 시 포화가스 (Envelope gas)의 영향은 아르곤(Ar) 산소($O_{2}$) 공기(Air) 질소($N_{2}$) 순서로 순수한 아르곤(Ar) 분위기에서 musty-odorous compound 류의 분해가 가장 빠르게 진행되었고 그 분해생성물로 CO, $CO_{2}$ 그리고 HCOOH, $CH_{3}COOH$ 등의 저급 유기산류가 검출되었다. 또한 이들의 분해반응은 물의 초음파분해에 따라 생성된 hydroxylradical에 의한 radical반응, cavitation bubble내에서의 고온고압에 의한 열분해 및 직접연소반응으로 진행됨을 알 수 있었다.