Journal of Industrial Technology (산업기술연구)

Kangwon National University, Institute of Industrial Technology (강원대학교 산업기술연구소)
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Effect of trace oxygen on H2S removal in anaerobic digestion

혐기소화 시 미량 산소가 H2S 제거에 미치는 영향

  • Jo, Eun-Young (Environmental Technology Division, Korea Testing Laboratory(KTL)) ;
  • Park, Kwang-Su (Division of Architectural, Civil, and Environmental Engineering, College of Engineering, Kangwon National University) ;
  • Ahn, Johng-Hwa (Division of Architectural, Civil, and Environmental Engineering, College of Engineering, Kangwon National University)
  • Received : 2019.09.19
  • Accepted : 2019.10.18
  • Published : 2019.10.31
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Abstract

This work experimentally determined the effect of microaerobic condition on anaerobic digestion of thickened waste activated sludge in semi-continuous mesophilic digesters at hydraulic retention time of 20 days. The concentration of hydrogen sulfide was $7{\pm}2ppm$ at the microaerobic condition and $14{\pm}2ppm$ at the anaerobic condition. Removal efficiency of volatile solid was not significantly different between microaerobic ($40{\pm}8%$) and anaerobic ($38{\pm}8%$) conditions. There was no important difference between microaerobic ($1,352{\pm}98ml/d$) and anaerobic ($1,362{\pm}104ml/d$) conditions in the biogas production, either. Therefore, it could be concluded that the application of the microaerobic condition was an efficient method of the hydrogen sulfide removal from the biogas.

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