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The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Characteristics of Carbon Dioxide Gasification for Sewage Sludge in Microwave

마이크로웨이브에 의한 하수 슬러지 이산화탄소 가스화 특성

  • JEONG, BYEORI (Department of Environmental Engineering, Chosun University) ;
  • YOON, SOOHYUK (Department of Environmental Engineering, Chosun University) ;
  • CHUN, YOUNGNAM (Department of Environmental Engineering, Chosun University)
  • 정벼리 (조선대학교 공과대학 환경공학과) ;
  • 윤수혁 (조선대학교 공과대학 환경공학과) ;
  • 전영남 (조선대학교 공과대학 환경공학과)
  • Received : 2016.04.01
  • Accepted : 2016.04.30
  • Published : 2016.04.30
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Abstract

A characteristics of microwave drying-gasification was analyzed for converting a dewatered sewage sludge generated a wastewater treatment plant. Gas (60%) was the largest component of the product of microwave gasification, followed by sludge char (33%) and tar (2%). The main components of the producer gas were hydrogen (33%) and carbon monoxide (40%), and there was some methane and hydrocarbons ($C_2H_4$, $C_2H_6$, $C_3H_8$). Larger nitrogen and smaller oxygen amounts were generated. Gravimetric tar generated $414g/m^3$. This means a total tar which is a heavy hydrocarbons from the volatile organic substance in the sewage sludge. Selected light tars were benzene, anthracene, naphthalene, pyrene, showing lower concentrations as 2.62, 0.37, 0.49, $0.28g/m^3$, respectively. Sludge char has larger meso pores which is a mean pore size of $50.85{\AA}$ and has high adsorptivity. An amount of adsorption was $228.71cm^3/g$, showing higher quantity than acommercial adsorbers. This indicates that the gas obtained from the microwave gasification of wet sewage sludge can be used as fuel, but the heavy tar in the gas must be treated. Sludge char can be used as a tar reduction adsorbent in the process, and then burns as a solid fuel.

Keywords

References

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