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Performance Evaluation of Hybrid SBR Aerobic Digestion combined with Ultrasonication by using a Mathematical Model

초음파 결합형 SBR 호기성 소화 모델과 영향 예측

  • 김성홍 (조선대학교 토목공학과) ;
  • 이동우 (뉴엔텍(주) 기술연구소) ;
  • 김동한 (서원대학교 환경건설정보학과)
  • Received : 2012.11.06
  • Accepted : 2012.12.12
  • Published : 2012.12.15

Abstract

Based on the activated sludge model, a simple aerobic digestion model which represents the aerobic sludge digestion by sequencing batch reactor(SBR) equipped with ultrasonicator was composed and performed in this study. The results are as follows. Aerobic digestion efficiency can be increased by adopting ultrasonic pretreatment. For the 5 days of SRT, 24 % of particulate component is predicted to be removed by ultrasonic pretreatment and aerobic digestion. This is 7 %p higher than that of conventional aerobic digestion. A Hybrid SBR aerobic digestion combined with ultrasonication shows higher digestion efficiency than aerobic digestion and ultrasonic pretreatment system. In case of this hybrid system, the digestion efficiency was predicted up to 49 % when the ultrasonication was performed every 2 hours, repeatedly. However, excessive treatment like every hours of ultrasonication in an aerobic digestion process results in adverse effect on TCOD removal because biomass disintegrated completely and the solubilized COD can not be used for the biomass synthesis again.

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