Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Application of activated carbon induced ballasted flocculation for improving activated sludge settleability

활성슬러지 침전성 향상을 위한 활성탄 가중응집제 적용 연구

  • Kim, Yongbum (Department of Environmental IT Convergence Engineering, Chungnam National University) ;
  • Yang, Hyeji (Department of Environmental IT Convergence Engineering, Chungnam National University) ;
  • Choi, Younggun (Department of Environmental IT Convergence Engineering, Chungnam National University)
  • 김용범 (충남대학교 환경IT융합공학과) ;
  • 양혜지 (충남대학교 환경IT융합공학과) ;
  • 최영균 (충남대학교 환경IT융합공학과)
  • Received : 2021.03.24
  • Accepted : 2021.04.01
  • Published : 2021.04.15
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Abstract

The effects of activated carbon originated Ballasted Flocculant (BF) on the settleability of activated sludge and the recovery of BF by Hydro-cyclone (HC) were analyzed experimentally. Two kinds of BF (M-I: 125-250 ㎛, M-II: 250-425 ㎛ in dia.) and three kinds of activated sludges with different SS concentration (2,300-7,100 mg/L) were applied for this study. With the dosage variation of BF from 0.14 to 1.3 g-BF/g-SS, we could obtain 24-31% improvement in SV30 (Sludge Volume after 30min sedimentation) for the lowest SS concentration sludge (2,300 mg/L). Whereas the SV30 improvement was much higher as 44-48% for the highest SS concentration sludge (7,100 mg/L). The settling characteristics of the sludge with BF followed Vesilind model the best among three models (Vesilind, Takacs and Cho model). HC could effectively separate BF with the separation efficiency of 70-90% and over 95% separation efficiency could be obtained when the HC was applied twice.

Keywords

Acknowledgement

본 연구는 한국수자원공사(Kwater)와 한국연국재단(NRF, project#: NRF-2020R1A2C2006769)의 연구비 지원에 의해 수행되었으며, 이에 감사드립니다.

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