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
제8권 제1호 (2009년 3월) 6건
1.
2009.03
구독 인증기관 무료, 개인회원 유료
This study was carried out to investigate the characteristics of major odorous pollutants emitted from foodwaste treatment facilities for providing the basic information in field of prevention. Twelve odorous components were analyzed at unit processes in 3 plants on May, August and October. The major odorous components appeared to be Ammonia (559.42 ppb), Acetaldehyde (229.70 ppb), Methylmercaptan (50.39 ppb) and Hydrogen sulfide (48.90 ppb). In the view-point of COC (Calculated Odor Concentration) based on odor threshold, A plant showed the highest value. The major odor active facilities were prevention ＞ input ＞ afterripening ＞ fermentation ＞ boundary ＞ pretreatment. The major odor active components were Hydrogen sulfide, Methylmercaptan, Acetaldehyde and i-valeraldehyde. It is important that the findings on major odor active facilities and components should be referred in the design of odor treatment process to the specific plants.
4,200원
2.
2009.03
구독 인증기관 무료, 개인회원 유료
In this study, the emission characteristics of reduced sulfur compounds (RSC) were investigated under decaying conditions using 3 food types with strong odor properties: (1) Kimchi (KC), (2) Fresh fish (FF), and (3) Salted fish (SF). The concentrations of RSC from food decaying samples were measured 5 times during the full study period over 15 days. All the analysis of RSC were made by gas chromatography/pulsed flame photometric detector (GC/PFPD) combined with air server/thermal desorber (AS/TD). According to our analysis, CH₃SH recorded the highest mean concentration (53.8 ppb) out of all RSCs investigated concurrently. Comparison between 3 food types showed that KC had the highest odor strength in primary stage, although it showed a notable decrease through time. On the other hand, FF and SF maintained generally low RSC concentrations in the beginning stage, but they showed large increases in emission concentrations with time. Thus, the results indicate that the relative pattern of RSC emissions tends to vary greatly with food types rather than RSC type.
4,000원
3.
2009.03
구독 인증기관 무료, 개인회원 유료
In order to improve the management of food waste treatment facility, this study investigated the emission characteristics of odorous compounds around treatment process and deodorization equipment of three food waste treatment facilities(the transformation, feed production and composting facility). Furthermore, the removal experiment of odorous compounds using various absorbent was conducted.
The odor concentrations of food waste storage hopper and separation process were higher than other processes and the major odorous compounds were methyl mercaptan, acetaldehyde, hydrogen sulfide and ammonia. The odor removal efficiencies of deodorization equipment such as activated carbon tower, wet scrubber and biofilter were mostly insufficient. Especially, the removal efficiency of wet scrubber is lower than the others, therefore the improvement of optimal operating condition is required. As a result of removal experiment of various absorbent, the removal efficiency was over 98% in case of 1% H₂SO₄+K₂HPO₄ for ammonia, KMnO₄ for acetaldehyde and KMnO₄ and 5% NaOH+KH₂PO₄ for hydrogen sulfide and methyl mercaptan. To achieve the effective odor control of food waste treatment facility, it is necessary increasing the removal efficiency of scrubber by using optimal absorbent for target odorous compounds.
4,200원
4.
2009.03
구독 인증기관 무료, 개인회원 유료
Semi-automatic cryogenic-preconcentrator is constructed with time controlling function in preconcentration and desorption stage. GC-FPD and cryogenic-preconcentrator were to analyze gaseous sulfur compounds (hydrogen sulfide, methanethiol, dimethyl sulfide, and dimethyl disulfide) in ppbv level. The objective of this study was to offer reliable methods for sulfur gas analysis in all procedures (keeping, concentration, desorption, and detection). The cryo-concentrator was able to concentrate 4 L gas sample of 40 % relative humidity. The recovery rate of the system was in the range of 92~100 % at 30 seconds of pre-heating time, and method detection limits were shown up 0.16~0.20 ng which is able to quantify 1 ppbv level with 0.5 L gas sample. The storage time of 5 ppbv sample in polyethylene bag led to serious loss (e.g; H₂S: loss of 30% after storage 3 days).
It was estimated that the analytical bias was affected more sensitively by storage time after sampling than by cryo-injection procedures in the analysis of hydrogen sulfide and methanethiol.
4,000원
5.
2009.03
구독 인증기관 무료, 개인회원 유료
To characterize testing bags for the interior parts and components of new vehicles, three types kinds of bags (Tedlar bag, Polyester Al bag, and PET bag) were selected and investigated.. All testing bags were initially purged with 5 L of pure nitrogen gas. Then, they were heated consecutively for four times in a chamber at 60 and 100℃ at hourlys intervals. Changes in background concentration levels of VOCs and HCHO were then measured. After the 4th heat treatment at 100℃, the background concentrations in PET bag were lower by 5 times than the ftrst time treatment. The results of PET bags were superior to the other bags under the same treatment conditions. Even without heat treatment test, the background concentrations of PET bag was also lower than the others by 2 to 6 times. Based on our results, it can be concluded that the PET bag is the most suitable for sample tests as it is physically the most stable along with the lowest background of all 3 sample bags with the least bias.
4,000원
6.
2009.03
구독 인증기관 무료, 개인회원 유료
This study pointed out problems on the operation by estimating process efficiency to the 3N-system(quick fermentable treatment process) which occupy plant to treat swine wastewater more than about 30 % in Jeju. And the parts to improve from problems were deduced and introduced those in situ.
When the parts to improve from problems were not introduced, the Concentration of H₂S and NH₄ was 5 and 50ppm in the fermenter, respectively. But the concentration of H₂S and NH₃ was shown N.D. and 1~2 ppm in the fermenter after introduction.
The concentration of H₂S and NH₃ were measured by 16 and 300 ppm highly in the aeratin tank before improvement, but those were shown N.D. and 0~1 ppm after improvement, respectively. Therefore, it showed possibility which could decrease odor efficiently with low cost by this study in 3N-system.
4,000원
