Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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Ultrasonic Sludge Disintegration for Improving Anaerobic Digestion and Simulation of ADM1

혐기성 소화효율 향상을 위한 초음파를 이용한 슬러지 전처리 및 ADM1 모의

  • Ahn, Jae-Hwan (Environment Research Department, Korea Institute of Construction Technology) ;
  • Kim, Mee-Kyung (Environment Research Department, Korea Institute of Construction Technology) ;
  • Bae, Jae-Ho (School of Environment and Civil Engineering, Inha University) ;
  • Kim, Hee-Jun (School of Environment and Civil Engineering, Inha University)
  • 안재환 (한국건설기술연구원 국토환경연구부) ;
  • 김미경 (한국건설기술연구원 국토환경연구부) ;
  • 배재호 (인하대학교 공과대학 환경토목공학부) ;
  • 김희준 (인하대학교 공과대학 환경토목공학부)
  • Published : 2007.01.31
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Abstract

The objectives of this study were to demonstrate that enhanced anaerobic digestion could be achieved by adopting ultrasonic cavitation pretreatment on the basis of the biogas production and to compare the simulation results of ADM1 (Anaerobic Digestion Model No. 1) with results of the experimentally operated digester the ultrasonic pretreatment of sewage sludge showed the hindered effect on the dewaterbility and the increase of SCOD production. In this study, four sets of lab-scale anaerobic digester were operated with untreated(control), 30 min, 60 min and 90 min ultrasonic pretreated sludge. TCOD removal efficiencies in digesters of control, 30, 60, 90 min sonicated sludge were 31.9%, 37.9, 38.5% and42.2%, and 75 removal were 15.9%, 20.8%, 21.5%, 24.1% respectively. Also more biogas was produced gradually with the increased sludge loading and the pretreatment time. Overall the simulation results had a correspondence tendency with the experimental efficiencies.

본 연구에서는 초음파 cavitation을 이용한 슬러지의 전처리가 슬러지의 가용화와 혐기성 소화조의 운전효율에 미치는 영향을 바이오가스 생성을 중심으로 알아보고, 전처리의 효과를 ADM1 (Anaerobic Digestion Model No. 1)을 이용하여 시뮬레이션 한 결과와 비교하였다. 실험결과, 초음파 전처리는 하수슬러지의 탈수성을 감소시키며 SCOD의 생성을 증가시키는 것으로 나타났다. 실험실 규모의 혐기성 소화조는 초음파 미처리 슬러지(control)와 30분, 60분, 90분간 처리된 슬러지를 대상으로 4 계열로 운전되었으며, 그 처리효율은 TCOD의 경우, 각각 31.9%, 37.9%, 38.5%, 42.2%의 제거효율을 나타내었다. 또한 TS의 감량효율은 각각 15.9%, 20.8%, 21.5%, 24.1%로 평가되어 전처리에 따른 제거효율의 증가를 확인 할 수 있었고, 슬러지 부하와 전처리 시간의 증가에 따라서 바이오가스의 생성량도 증가하는 것으로 나타났다. 슬러지 전처리에 따른 혐기성 소화조의 운전결과와 시뮬레이션 결과의 추이는 전반적으로 일치하는 경향을 나타내었다.

Keywords

References

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