• Title, Summary, Keyword: stench

Search Result 16, Processing Time 0.034 seconds

Survey on Public Responses to Odor Produced at Jangrim-Sinpyoeng Municipal and Industrial Wastewater Treatment Plant in Busan (신평장림 공단 폐수처리장 발생의 악취 조사연구)

  • Son, Hyun-Keun;Sivakumar, Subpiramaniyam;Yoon, Young-Hun
    • Journal of Environmental Health Sciences
    • /
    • v.37 no.3
    • /
    • pp.201-208
    • /
    • 2011
  • Objective: Emissions of volatile organic compounds (VOCs) from municipal wastewater treatment plants and industrial wastewater are often overlooked as sources of exposure to toxic chemicals. VOCs from such sources evaporate readily into the air and may have significantly adverse impacts on public health. The present study aimed to establish the concentration of VOCs released from Jangrim-sinpyoeng Municipal and Industrial Wastewater Treatment plant (JWTP) in Busan, South Korea and assess the causes of the odor/stench in the surrounding residential facilities. Stench intensity, frequency and release time, and wind direction were also monitored. Methods: Onsite data were collected on a daily basis from a laboratory located on the JWTP premises through a period spanning 2006 to 2010. A second set of data was obtained in 2006 by conducting a questionnaire survey with 210 respondents living near JWTP. The experimental and survey data were analysed statistically using the SPSS package. Results: The survey results showed that people residing around JWTP strongly perceive a stench from the plant. The intensity of the stench was influenced significantly by wind direction and the location of the apartments facing the JWTP. Public participation formed a significant step in determining the quality of the study environment. Conclusion: Onsite data and survey data obtained in 2006 indicate that the nature of the odor experienced by residents is due to the intensity of total VOCs released by JWTP. However, additional research is needed to determine the effects of the VOC pollution on public health and quality of life.

A Method of Nonlinea Color Transform from CIE $L^{*}a^{*}b^{*}$ to CMY Value by Neural Network (신경망에 의한 CIE $L^{*}a^{*}b^{*}$-CMY의 비선형 색변환)

  • 서봉우
    • Journal of the Korean Printing Society
    • /
    • v.15 no.1
    • /
    • pp.57-69
    • /
    • 1997
  • The field of printing to use pressurized ink using screen gossamer that is called screen printing. Existing cleaning solvents for the screen printing are the organic solvents containing aromatic compounds and stench. Also, Cleaning method of screen printing are for the most part mixed cleaning method of dipping and polish. In this study, we measured the cleaning efficiency by gravimetric analysis and the property change of gossamer by image analyzer using existing cleaning solvent. Also, we investigated a new cleaning process showing excellent cleaning efficiency using the ultrasonic and vibration cleaning method instead of the exsiting mixed cleaning method.

  • PDF

A Study on Optical Analysis and Overprinting Sequence in 2-Color Solid Overprints (2색 중첩 민인쇄의 광학적 해석과 중첩인쇄 순서에 관한 연구)

  • 강상훈
    • Journal of the Korean Printing Society
    • /
    • v.15 no.2
    • /
    • pp.1-4
    • /
    • 1997
  • Existing cleaning solvent using screen printing are the organic solvents including aromatic compounds carried with poisonous and stench. besides, Cleaning method of current screen printing are for the most part mixed cleaning method of dipping and polish. Using 1,1,1-TCE, CFC-113 alternative system cleaning solvent be substituted for existing cleaning solvent against screen printing ink measured the cleaning efficiency according to gravimetric analysis method and property change of gassamer according to Image Analyzer. Also, Cleaning process system carry with excellent cleaning efficiency studied which was proposed new cleaning process including ultrasonic cleaning process be substituted for existing mixed cleaning method of dipping and polish.

  • PDF

Development of Golf-wear Design depicted on Natural Image used by Natural Dyeing (천연염색을 이용한 자연적 이미지의 골프웨어 디자인 개발)

  • Jang, Ae-Ran
    • Korean Journal of Human Ecology
    • /
    • v.17 no.3
    • /
    • pp.501-509
    • /
    • 2008
  • This research intends to help local small fashion industry to outgrow its limitation, preserving and developing environment-friendly dyeing tradition in Jeju renowned for persimmon juice dyeing. The study, then, aims to develop eco-friendly golf-wear designs, with maximizing advantages of natural dyeing (with persimmon juice, indigo plant, gallnut, cochineal, turmeric, and loess) such as rot-proofness, bacteria-proofness, stench-proofness and block of ultraviolet rays. The results are as follows: first, natural fabrics such as muslin(cotton 100%), linen(linen 100%) and spandex(mixed cotton 98%, polyurethane 2%) were developed into eco-friendly ones colored with various natural dye sources. Second, four kinds of golf-wear design were developed to stand out golf wear's natural image, focused on classic, neo-minimal style. The characteristic details and design elements of sportswear were added to basic golf wear design. Therefore, it is hopeful that those designs of naturally dyed golf wear for women could be utilized for other various purposes in the future.

Adsorption characteristics of tert-Butyl Mercaptan on Impregnated Activated Carbon (첨착활성탄을 이용한 tert-Butyl Mercaptan의 흡착특성 연구)

  • Kim S. B.
    • Journal of the Korean Institute of Gas
    • /
    • v.7 no.1
    • /
    • pp.47-52
    • /
    • 2003
  • The adsorption characteristics of rert-butyl mercaptan(TBM) on base activated carbon and activated carbon impregnated with $CuCl_2$ or KI were studied. Adsorption of TBM on the surface of the KI or $CuCl_2$ impregnated activated carbon was detected by gas chromatograph equipped with a flame photometric detector. The amount of adsorption on those impregnated carbon found to be 7 or 8 times greater than on the non-impregnated activated carbon and varied according to the concentration of impregnated metal. FT-IR measurement showed that major reaction occuring on the surface of the catalytic adsorbent was dimerization of TBM into di-tert-butyl disulfide which had no stench.

  • PDF

Study on the Cleaning Screen Printing using Alternative Cleaning Solvent of 1,1,1-TCE, CFC-113 (1,1,1-TCE, CFC-113 대체세정제를 이용한 스크린인쇄 세정연구)

  • Lee, Ki-Chang;Yoon, Cheol-Hun;Hwang, Sung-Kwy;Oh, Se-Young;Lee, Seok-Woo;Ryu, Jung-Wok
    • Journal of the Korean Applied Science and Technology
    • /
    • v.14 no.2
    • /
    • pp.115-122
    • /
    • 1997
  • The field of printing use to pressurization ink using screen gassamer that is called screen printing. Existing cleaning solvent using screen printing are the organic solvents including aromatic compounds carried with poisonous and stench. Besides, cleaning method of current screen printing are for the most part mixed cleaning method of dipping and polish. Using 1,1,1-TCE, CFC-113 alternative system cleaning solvent be substituted for existing cleaning solvent against screen printing ink measured the cleaning efficiency according to gravimetric analysis method and property change of gassamer according to Image Analyzer. Also, Cleaning process system carry with excellent cleaning efficiency studied which was proposed new cleaning process including ultrasonic and vibration cleaning process be substituted for existing mixed cleaning method of dipping and polish.

A Study on the Present Situation of Environmental Education for Sustainable Development in the 7th Curriculum Elementary School (제7차 초등교육과정에서 지속가능한 발전을 위한 환경교육 실태 연구)

  • Park, Hu-Seo;Lee, Gyu-Sup;Park, Jung-Hee;Choi, Suk-Jin;Ahn, Jong-Woon
    • Hwankyungkyoyuk
    • /
    • v.20 no.1
    • /
    • pp.28-41
    • /
    • 2007
  • Current environmental education at elementary school is demanded to be changed into 'Sustainable Development', Therefore, we should find a new program to reflect appropriateness and diversity of environmental education at elementary school for 'Sustainable Development'. The result of analysing textbooks and the realities in environmental education at elementary school is as follows, First, when we analysed the contents of the textbook in environmental education, the reflecting rate was high in 'natural environment' and 'sound consumption', compared with in 'artificial environment', 'resource and energy' and 'health and environment'. Second, we realized the necessity for 'environmental education' complementary to 'Sustainable Development'. That is because the analysis showed the lack for the activity for approaching and solving environmental problems with 'artificial environment', 'resource and energy' and 'health and environment'. Third, the analysis also showed the deficiency in the reflection of 'environmental education' contents for maintaining healthful environment through improving the quality of life. Current textbook didn't deal with very important elements of 'environmental education' - the Quality of indoor atmosphere, harmful matter, safe things to eat, noise, stench, etc. For those reasons, it is necessary to reconstruct the realm and the contents of 'environmental education' for 'Sustainable Development' appropriate to elementary school. We require a new curriculum and textbook to cover diverse' environmental education' as well.

  • PDF

Analysis on Hot Plate Welding of Thermoplastic Elastomer Packing (열가소성 엘라스토머 패킹의 열융착 해석)

  • Kim, Min Ho;Lee, Yong Tae;Chung, Jae Dong
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
    • /
    • v.28 no.12
    • /
    • pp.477-482
    • /
    • 2016
  • Airtight containers have been widely used in many industries and household. They need a packing for sealing between the inside and outside. Previous packing materials have some drawbacks like stench, stickiness, and difficulty of applying to automated manufacturing systems. So, a new packing material which is harmless and suitable for automation is needed. This study performed a hot plate welding process of thermoplastic elastomer (TPE) as the packing material. The hot plate welding process included a phase change process of solidification and melting. The porosity-enthalpy method was adopted in order to simulate phase change problems. The TPE showed non-Newtonian fluid characteristics during the melting process. Since properties of SEBS are not well-defined, we established TPE properties by observing the melting behavior of TPE. In order to find an optimized condition, a parametric study including packing thickness, shapes, hot plate temperature, and thermal resistance, was conducted.

Enzymatic Synthesis of Lauric Acid Butyl Ester in Organic Media Containing Nonionic Surfactants (비이온 계면활성제를 포함한 유기 용액에서의 효소에 의한 라우르산부틸에스테르의 합성)

  • Cheong, Yong-Il;Lim, Kyung-Hee
    • Applied Chemistry for Engineering
    • /
    • v.16 no.5
    • /
    • pp.705-711
    • /
    • 2005
  • The reaction of lauric acid vinyl ester with n-butanol was established to give lauric acid butyl ester by subtilisin A-catalyzed transesterification in organic media containing nonionic surfactants. Pyridine has been used as an organic solvent since it provides higher yields than other organic solvents. However, because of stench of pyridine, compounds enzymatically synthesized in pyridine may be unsuitable as ingredients for foods and drugs. Hence, in order to select an organic solvent to replace pyridine, sugar esters were synthesized with the protease in various organic media. However, no solvent paralleled pyridine in yields. On the basis of this result, pyridine-based W/O microemulsions containing nonionic surfactants and water were used in enzymatic synthesis of the sugar ester, and when Tween 60, Brij 56, or 1-O-octyl-${\beta}$-D-glucopyranose was used for the W/O microemulsions, the yield was higher.