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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

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.

Keywords

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