Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
권호 표지

Sludge Reduction in Activated Sludge Process by solubilizing Return Sludge using Electric Field/Ultrasonification

전기장 및 초음파에 의한 반송슬러지의 가용화에 따른 활성슬러지에서의 슬러지 감량화

  • Yoon, Soon-Uk (Department of Environmental Engineering, Inha University) ;
  • Ahn, Chang-Min (Department of Environmental Engineering, Inha University) ;
  • Kim, Chang-Gyun (Department of Environmental Engineering, Inha University)
  • 윤순욱 (인하대학교 환경공학과) ;
  • 안창민 (인하대학교 환경공학과) ;
  • 김창균 (인하대학교 환경공학과)
  • Published : 2013.05.30
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Abstract

This study was conducted to reduce excess sludge generation by recycling of return sludge to the aeration tank after solubilization by electric field charger and ultrasonifier. The return sludge was purposely broken-up to the ratio of $SCOD_{Cr}/TCOD_{Cr}$ at 0.1, 0.2, and 0.3, which was tested along with control (i.e., untreated). Solubilized sludge was subsequently treated in a bench-scaled conventional activated sludge reactor. According to varying $SCOD_{Cr}/TCOD_{Cr}$ ratios, TSS in the reactor was correspondingly increased from 129 to 219 mg/L and $TCOD_{Cr}$ was also from 257 to 335 mg/L. However, TSS in the effluent was nevertheless kept lower at below 30 mg/L and $TCOD_{Cr}$ was also unvaryingly below 40 mg/L. For $SCOD_{Cr}/TCOD_{Cr}$ = 0.3, the amount of excess sludge produced was at the highest decreased up to as high as 78%.

Keywords

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