• Title, Summary, Keyword: odor

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Study on the characterization of domestic odor facilities by using the olfactory field odor measurement method (현장 후각측정법을 이용한 국내 악취현장 특성 평가)

  • Kim, Jong Hyeon;Kim, Na Rae;Jo, Gang Nam;Park, Jeong Min;Jang, Hyeon Seop;Bang, Seon Ae;Kim, Seong Tae;Han, Jin Seok;Kim, Dae Gon;Kim, Jeong Su;Gong, Bu Ju
    • Journal of odor and indoor environment
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    • v.17 no.3
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    • pp.274-285
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    • 2018
  • In this study, we conducted a survey on odor characteristics of single odor and collective odor facilities using the German olfactory odor method and carried out the odor frequency modeling. The influence of the odor from a sewage treatment plant, which is a single discharge facility, was strong in the eastern and northern parts of the plant and appeared to be in good agreement with the areas where the odor complaints were frequent. The German olfactory method reflects the odor complaints and odor occurrence characteristics of the receptors as compared with the domestic odor measurement method. The influence of the odor from the odor control area, which is a collecting and discharging facility, showed a tendency in which the sum of the odor occurrence frequency increased with the proximity of the odor discharge facility to the dense industrial complex. Furthermore, it was judged that it is not easy to extract the odor frequency results for individual facilities because the survey subject is the group discharge facility area. Therefore, it will be necessary to introduce a method to manage odor in the future. In this study, the measurement of odor frequency using the German olfactory odor method is partially applied to some odor sources. Appropriately, it is not applicable to various emission sources. However, the odor measurement method based on odor occurrence frequency and odor sensory can be used for investigation of the actual condition, permits of odor discharge facilities and the environmental review.

A Study on Correlation of Odorous Compounds and Odor Substance occurring in Septic Tank and Sewer Pipe (하수관거 및 정화조에서 발생하는 악취물질이 복합악취에 미치는 영향에 관한 연구)

  • Song, Homyeon;Cho, Jeongil
    • Journal of Korean Society of Water and Wastewater
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    • v.27 no.2
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    • pp.165-175
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    • 2013
  • This study aims to analysis correlation in septic tank and sewer pipe between odor substances and complex odor. For the analysis, convert odor substances to odor intensity, and estimate the effect of odor substances on complex odor. As a result, both Hydrogen sulfide and Methyl mercaptane of specified offensive odor substances accounted for 29 percent of the effect of odor substances on complex odor. Hydrogen sulfide and Methyl mercaptane are major cause of odor from septic tank and sewer pipe. The result of this study is suggested to be used as a preliminary data for research on analysis complex odor and odor substances.

Odor Removal Characteristics of Biofilters in Domestic Sewage Treatment Facilities Analyzing Composite Odor and Odor Quotient (복합악취와 악취농도지수 분석을 통한 국내 하수처리시설 바이오필터의 악취제거 특성)

  • Ko, Byung-Churl;Park, Young-Ho;Kim, Dong-Il;Lee, Min-Gyu;Kam, Sang-Kyu
    • Journal of Environmental Science International
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    • v.22 no.1
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    • pp.109-117
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    • 2013
  • The removal characteristics of composite odor and malodorous substances using 33 biofilters in sewage treatment facilities were investigated. The geometry mean values of composite odor and odor quotient were reduced by 52.7% and 59.2% at the outlet of the biofilters, respectively. The removal efficiencies of the biofiltes for the composite odor and odor quotient show a significant difference statistically(p=0.000<0.05). The median value of odor quotient of sulfur compounds was reduced by 69.1% at the outlet of the biofilter and the odor quotient of the sulfur compound at the inlet and outlet of the biofilter shows a significant difference statistically(p=0.000<0.05); on the other hand, those of the $NH_3$ and trimethylamine, aldehydes, VOCs and alcohols, organic acids do not.

Evaluation of Malodor Release and Control Devices in Charcoal Manufacturing Facility (숯 제조시설의 악취물질 배출특성과 관리실태 조사 연구)

  • Jeong, Ju-Young;Seo, Byeong-Ryang;Kim, Jae-Hyuck;Chin, Sung-Min;Jurng, Jong-Soo
    • Journal of Environmental Science International
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    • v.21 no.7
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    • pp.883-890
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    • 2012
  • Emission characteristics of gaseous odor compounds emitted from the charcoal manufacturing process were investigated, and evaluated the odor removal efficiency of odor control devices. It was found that the measured odor dilution ratio of emission gases ranged from 10,000 to 44,814, which exceed largely the emission standard in the stack. Methylmercaptan, trimethylamine, hydrogen sulfide, acetaldehyde were turned out as major odor compounds of the charcoal manufacturing process. It was revealed that the odor removal ratio of odor control devices were very low due to the its improper maintenance and wrong design.

A Comparative Study for Odor Control Regulations (악취관리제도의 국가간 비교연구)

  • 양성봉;김석만
    • Journal of Korean Society for Atmospheric Environment
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    • v.16 no.1
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    • pp.79-87
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    • 2000
  • This study analyzed the regulations concerning odor management or control in Korea, Japan, and developed countries such as USA and Germany. The Korean restriction standards and measurement methods for offensive odor substances are very similar to the Japanese standards and methods promulgated in 1976. Japan promulgated the odor control act and the specific measurement methods of the offensive odor substances in 1973. In Japan, currently, the local governments can establish their own odor restriction areas and proclaim their own standards suitable for their situations. Also, Japan has more strict regulations and more offensive odor substances to be monitored than Korea. The restriction standards of odor in German is quite similar to the permissible limits and standards of air pollutants at emission sources in Korea. Many states in USA are adopting their own restriction standards and measurement methods, e.q., the ambient air pollution standards, organic functionstest methods by dilation, and establishment and addition of air pollution control equipment at emission sources. Finally, this study analyzed the problems of the regulations, standards, and measurement methods concerning the Korean offensive odor management. Since the direct organic fuctions measurement(DOFMM) method is depending upon the personal sensitives of odor substances, the measurement odor value can be equivocal. That is, the odor measurement value by an examines can differ from that by the other examines. Also, there can be conflicts with the measured odor values depending upon the applied measurement methods, e.q., the DOFMM, the dilation method, and the instrumental analysis method.

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A Study on Odor Emission Characteristics of Domestic Sewage Treatment Facilities Using Composite Odor Concentration and Hydrogen Sulfide Concentration (복합악취 농도와 황화수소 농도를 이용한 국내 하수처리시설의 악취발생 특성에 대한 연구)

  • Ko, Byung-Churl;Lee, Jong-Kuk;Lee, Yoon-Su;Lee, Min-Gyu;Kam, Sang-Kyu
    • Journal of Environmental Science International
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    • v.21 no.11
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    • pp.1379-1388
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    • 2012
  • Odor from sewage treatment plants have the potential to cause significant annoyance and to impact the amenity. In this study, odor emission characteristics at unit process of 48 sewage treatment facilities in 39 plants were evaluated using composite odor concentration and hydrogen sulfide ($H_2S$) concentration. The values of composite odor concentration (geometry mean) and $H_2S$ concentration (median) for sludge treatment processes are higher than those for the other treatment processes. The composite odor concentration and $H_2S$ concentration are distributed over a wide area in each process. Composite odor concentration (dilution ratio) was found to have the significant correlation with $H_2S$ concentration (p=0.000<0.05). The $H_2S$ concentration accounted for 67.1% of composite odor concentration.

Simple Prediction of Odor Affection by Odor Emission Rate from a Chemical Plant (화학공장의 악취배출량으로부터 간이 악취 영향도 예측 사례)

  • 유미선;양성봉;이오근
    • Journal of Environmental Science International
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    • v.11 no.4
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    • pp.383-389
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    • 2002
  • Odor sources of a chemical plant in Ulsan were surveyed and temperatures, humidities and flow rates of each exhaust gas were measured. The air samples collected from each source were transferred to the laboratory for sensory test and their odor concentrations were investigated. The odor emission rate of each source was estimated from the recorded results and assigned the sources expected to be needed for the odor prevention policy using the simple prediction equation of the affection by malodor to the nearest residential area. From the total odor emission rate of the examined plant and the relation table for expectable affection area it was concluded that total odor emission of this plant might be decreased for the prevention of residential complaint.

Changes in Odor Characteristics of Doenjang with Different Preparing Methods and Ripening Periods (제조방법과 숙성기간에 따른 된장의 향기특성 변화)

  • Choi, Mi-Kyung;Sohn, Kyung-Hee;Jeon, Hyeong-Ju
    • Journal of the Korean Society of Food Culture
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    • v.12 no.3
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    • pp.265-274
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    • 1997
  • This study was conducted in ordor to find the most suitable conditions for producing the Doenjang with optimal odor compound contents. Three sample groups with the different preparing methods -Doenjang that has not gone through the soy sauce separation process (Doenjang A), Doenjang that has gone through the soy sauce separation process; Meju-20% salt water ratio of 1 : 4 (Doenjang B), and that with the ratio of 1.3 : 4 (Doenjang C)- were tested during different ripening periods. Odor compound contents were analyzed through Solvent Extraction Method and Simultaneous Steam Distillation Extraction (SDE). The number of odor compounds was greatest in Doenjang A and during the mid to late stage in each groups. In the sensory evaluation of Doenjang odors, Doenjang A received the highest scores in the categories of overall preferences, while Doenjang C got the lowest scores. Individual odor didn't vary significantly during ripening periods, but the overall odor and taste preference was highest in the samples ripened for 75 to 120 days. Stepwise multiple regression analysis of major odor compounds of Doenjang revealed that benzeneacetaldehyde is the major explanatory variable for offensive odor. Benzeneethanol, 3-methylthio-propanal and 4-methyl-phenol are the explanatory variables for salty odor, nutty odor and rancid odor, respectively. Odor compounds that contribute to the overall odor preference varied from the compounds that affect the taste preference.

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Basic Study on Quality Assurance of Concrete Structure by using Odor Sensor (후각센서 사용에 의한 콘크리트 구조물의 품질평가에 관한 기초적 연구)

  • Shirokado, Yoshitsugu;Kagaya, Makoto;Lee, Sang-Hun
    • 한국방재학회:학술대회논문집
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    • pp.42-42
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    • 2010
  • In order to assure the quality of concrete structure in construction process, the odor strength measured by using odor sensor was used to evaluate curing effect. Then, the compressive strength and odor strength in ordinary concrete N were shown in water curing(=standard curing), indoor and outdoor atmospheric curing condition. The difference between odor strength in the standard curing and that in each curing condition was defined as the difference in the odor strength. And the difference in odor strength in slag powder concrete BP cured in water curing(=standard curing) for different period before exposing in outdoor atmosphere in winter season were evaluated at the age of 14 days. A necessity to prolong the moisture curing for the slag powder concrete BP compared with the ordinary concrete N to obtain a required curing effect was shown by measuring the odor strength and long term compressive strength.

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Effect of the Hose Slurry Spreader on Oder Reduction (호스지표살포기의 악취감소효과 분석)

  • 오인환;김기덕
    • Journal of Animal Environmental Science
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    • v.7 no.2
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    • pp.119-126
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    • 2001
  • For the odor test, it was chosen the conventional spreader, the hose spreader, and its combination with disk harrow and spring harrow as a slurry spreader. By the odor tester (Kalmor-$\sum$) with dairy slurry, the conventional spreader has the average $\sum$ value of 270, which means that one fells substantial odor and torment. In the cases of hose spreader and its combination with disk harrow, $\sum$ value was 217 and 182 respectively, which means a normal person does not smell any odor. Spreading the swine slurry with a conventional spreader shows $\sum$ value of 440, which means one feels unpleasant. The hose spreader shows $\sum$ value of 258, which lies in the limit one feels some odor and torment. Its combination with disk harrow has $\sum$ value 184, which means that a normal person can not smell any more. For the conventional spreader, the odor intensity indices from air dilution sensual test and 3 point odor bag as a sensual test were 66.9 and 35.4 respectively. On the other hand, the indices were 9.65 and 11.10 by hose spreader and its combination with disk harrow, which were lower than that of the regulation for industry. Therefore, the developed hose spreader showed an excellent effect on decreasing odor. The correlation between the results from odor tester and 3 point odor bag has shown 0.997 by swine slurry.

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