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폐기물소각시설에서 배출되는 유해대기오염물질의 최적가용제어기술 국내 적용성 평가
장하나 ( Ha-na Jang ),이주형 ( Ju-hyung Lee ),김정훈 ( Jeong-hun Kim ),송금주 ( Geum-ju Song ),문영훈 ( Young-hun Moon ),서용칠 ( Yong-chil Seo ) 한국폐기물자원순환학회 2019 한국폐기물자원순환학회지 Vol.36 No.7
With the trend towards more stringent regulations, Korea has investigated implementing US MACT (Maximum Available Control Technology) or BAT (Best Control Technology) to manage hazardous air pollutants (HAPs) from major emission sources. Sampling and analyses of hazardous air pollutants were performed at five municipal waste incinerators (MWIs) with different combustion capacities and air pollution control device configurations. The concentrations of particulate matter and heavy metals were controlled at efficiencies of 90 ~ 95% across the APCDs due to the installation of bag-filters with high efficiencies in all the MWIs examined. All MWI plants complied with the emission limit of NOx. In the tested facilities, selective catalytic reduction (SCR) was more efficient for NOx removal than selective non-catalytic reduction (SNCR). Benzene and its compounds and xylene were the main emitted substances among the volatile organic compounds (VOCs). A draft guideline of MACT was suggested based on US MACT regulations for MWIs, reviewing the existing Korean regulations, and sampling and analyzing the HAPs from operating facilities.
장귀영,최재훈,김형돈,서경혜,이승은,지윤정,강민혜,김동휘,최수지,Jang, Gwi Yeong,Choi, Je Hun,Kim, Hyung Don,Seo, Kyung Hye,Lee, Seung Eun,Jee, Yun Jeong,Kang, Min Hye,Kim, Dong Hwi,Choi, Su Ji 한국식품영양학회 2020 韓國食品營養學會誌 Vol.33 No.3
The aging treatment was applied to Rehmannia glutinosa rhizome (RGR) to improve the digestibility by the enzymatic hydrolysis of undigestible sugars. However, RGR spoils easily during the aging treatment. Thus, the purpose of this study was to investigate the influence of ethanol addition as preservatives on sugars and microbial growth of aged RGR. The RGR was treated with the addition of ethanol (0~10%) at 55℃ for eight days. Reducing, free sugars, and total bacterial counts of RGR with ethanol concentrations were analyzed during the aging periods. The aged RGR with 0-2% ethanol appeared spoiled in appearance, and total bacterial counts of these samples increased from 1.1×10<sup>5</sup> to 2.2×10<sup>7</sup> CFU and then decreased again. When treated with 4~10% ethanol, the total bacterial counts of aged RGR decreased by more than 99.9% at eight days. In all samples, reducing and digestible sugars increased, and stachyose decreased by the aging treatment. Sucrose content was highest in the 6% ethanol sample (18.2% at six days). These results indicate that the ethanol addition can be applied to the aging treatment of the RGR for improving qualities (sweetness, digestibility, and microbial growth), and can be considered for the stable production of high quality aged RGR.