Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Decomposition of odor using atmospheric-pressure plasma

플라즈마를 이용한 악취물질 분해 특성

  • Kang, Seok-Won (Dept. of Earth and Environmental Engineering, College of Engineering, Kangwon National University) ;
  • Lee, Jae-Sik (Dept. of Earth and Environmental Engineering, College of Engineering, Kangwon National University) ;
  • Lee, Kang-San (Dept. of Earth and Environmental Engineering, College of Engineering, Kangwon National University) ;
  • Lim, Hee-Ah (Dept. of Earth and Environmental Engineering, College of Engineering, Kangwon National University) ;
  • Kim, Ji-Seong (Dept. of Earth and Environmental Engineering, College of Engineering, Kangwon National University) ;
  • Lee, Jeong-Dae (Dept. of Earth and Environmental Engineering, College of Engineering, Kangwon National University) ;
  • Park, Wol-Su (Dept. of Earth and Environmental Engineering, College of Engineering, Kangwon National University) ;
  • Park, Young-Koo (Dept. of Earth and Environmental Engineering, College of Engineering, Kangwon National University)
  • 강석원 (강원대학교 공학대학 지구환경시스템공학과) ;
  • 이재식 (강원대학교 공학대학 지구환경시스템공학과) ;
  • 이강산 (강원대학교 공학대학 지구환경시스템공학과) ;
  • 임희아 (강원대학교 공학대학 지구환경시스템공학과) ;
  • 김지성 (강원대학교 공학대학 지구환경시스템공학과) ;
  • 이정대 (강원대학교 공학대학 지구환경시스템공학과) ;
  • 박월수 (강원대학교 공학대학 지구환경시스템공학과) ;
  • 박영구 (강원대학교 공학대학 지구환경시스템공학과)
  • Received : 2020.04.08
  • Accepted : 2020.07.03
  • Published : 2020.07.31
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Abstract

Offensive odor is recognized as a social environmental problem due to its olfactory effects. Ammonia(NH3), hydrogen sulfide(H2S) and benzene(C6H6) are produced from various petrochemical plants, public sewage treatment plants, public livestock wastes, and food waste disposal facilities in large quantities. Therefore efficient decomposition of offensive odor is needed. In this study, the removal efficiency of atmospheric-pressure plasma operating at an ambient condition was investigated by evaluating the concentrations at upflow and downflow between the plasma reactor. The decomposition of offensive odor using plasma is based on the mechanism of photochemical oxidation of offensive odor using free radical and ozone(O3) generated when discharging plasma, which enables the decomposition of offensive odor at ordinary temperature and has the advantage of no secondary pollutants. As a result, all three odor substances were completely decontaminated within 1 minute as soon as discharging the plasma up to 500 W. This result confirms that high concentration odors or mixed odor materials can be reduced using atmospheric-pressure plasma.

대기오염 중 악취는 인간의 생활이나 활동, 건강에 직·간접적으로 영향을 주어 사회적 환경문제로 인식되고 있다. 악취물질 중 NH3(암모니아), H2S(황화수소), C6H6(벤젠)은 석유화학공장, 공공하수처리시설 및 분뇨처리시설, 가축분뇨 처리시설, 폐기물 처리시설과 음식물류 처리시설에 등에서 대량으로 발생하므로 효율적인 악취 제거가 필요한 실정이다. 본 연구에서는 대기압 플라즈마를 이용한 악취 제거와 제거효율을 연구하였다. 가스크로마토그래피(Gas Chromatography, GC)와 악취측정장치를 이용하여 대기압 플라즈마와 악취물질 반응 전후의 농도를 측정하였다. 측정결과를 백분율로 환산하여 효율을 평가하였다. 플라즈마를 이용한 악취 분해는 플라즈마를 방전시킬 때 생성된 활성라디칼과 O3(오존)을 이용하여 악취물질을 중화처리 및 광화학적으로 산화하는 기전을 이용한 것으로 상온에서 악취 물질의 처리가 가능하며, 2차 오염물질의 발생이 없다는 장점이 있다. NH3, H2S, C6H6 3가지 악취 물질 모두 대기압 플라즈마의 출력을 500 W로 방전시켜 반응시켰을 때 모두 1분 내로 악취 물질이 완전히 분해되었다. 따라서 고농도의 악취 물질과 두 종류 이상의 냄새유발 물질이 반응할 때 발생한 복합악취 또한 대기압 플라즈마를 이용하여 제거할 수 있다고 판단된다.

Keywords

References

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