Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Application of tubular membrane to thickening process as a pre-treatment of anaerobic digester

관형막을 이용한 혐기소화조의 전처리 농축공정으로써 적용가능성 연구

  • Kang, Hee-Seok (Sungkyunkwan university graduate school of water resources) ;
  • Park, Ki-Tae (Sungkyunkwan university graduate school of water resources) ;
  • Park, Jung-Woo (Sungkyunkwan university graduate school of water resources) ;
  • Kim, Hyung Soo (Sungkyunkwan university graduate school of water resources)
  • 강희석 (성균관대학교 수자원전문대학원) ;
  • 박기태 (성균관대학교 수자원전문대학원) ;
  • 박정우 (성균관대학교 수자원전문대학원) ;
  • 김형수 (성균관대학교 수자원전문대학원)
  • Received : 2014.12.22
  • Accepted : 2015.04.15
  • Published : 2015.04.15
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Abstract

The purpose of this study is to estimate the applicability of a stable anaerobic digester using a separator membrane to the preprocessing thickening process. The results of the experiments showed about a 47.16% weight loss rate for the sludge under anaerobic condition, and about 41.17% under intermittent aeration condition. The concentrations of rejection water were $SCOD_{Cr}$ 25 mg/L, T-N 16.6 mg/L, and T-P 1.4 mg/L on the average under the intermittent aeration condition, which were lower than the concentrations of rejection water under an anaerobic condition. As for the factors affecting the reduction of the flux, correlation analyses of TTF, MLSS, $SCOD_{Cr}$, and $EPS_{Protein}$, $EPS_{Polysacchride}$ resulted in -0.97, -0.95, -0.84 and -0.86, -0.95, respectively, which showed that TTF had the highest correlation to the reduction of the flux. In addition, it was concluded that MLSS, $SCOD_{Cr}$ and $EPS_{Protein}$, $EPS_{Polysacchride}$ also have close correlations. The results are considered to show that, in the case of the process using a tubular membrane in the preprocessing process of an anaerobic digester, an intermittent aeration condition of the thickener considering the contamination of the membrane and load of rejection water is appropriate for the stable preprocessing process.

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