Methane Production and Nitrogen Removal from Piggery Wastewater in the TPAD Coupled with BNR Process

질소제거공정과 결합한 2상 혐기성 소화공정에서 돈분폐수의 메탄생성 및 질소제거

  • Park, Noh-Back (Department of Environmental Engineering, Chungbuk National University) ;
  • Park, Sang-Min (Center for Environmental technology Research, Korea Institute of Science and Technology (KIST)) ;
  • Choi, Woo-Young (Department of Environmental Engineering, Chungbuk National University) ;
  • Jun, Hang-Bae (Department of Environmental Engineering, Chungbuk National University)
  • 박노백 (충북대학교 환경공학과) ;
  • 박상민 (한국과학기술연구원 환경기술연구단) ;
  • 최우영 (충북대학교 환경공학과) ;
  • 전항배 (충북대학교 환경공학과)
  • Received : 2008.08.31
  • Accepted : 2008.11.10
  • Published : 2009.01.30

Abstract

Nitrogen removal and methane production from piggery wastewater were investigated in two-phase anaerobic digestion (TPAD) coupled with biological nitrogen removal (BNR) process at $35^{\circ}C$. Methane production rate was about $0.7L/L{\cdot}day$ at organic loading rate (OLR) of $1.2g{\cdot}TCOD/L{\cdot}day$ in methanogenic UASB. Conversion efficiency of the removed TCOD into methane in UASB was as high as 72% and overall TCOD removal efficiency in this system was over 97%. Ammonia nitrogen were stably removed in BNR system and overall efficiency were 98%. With recirculation of the nitrified final effluent to TPAD, nitrogen oxides were completely removed by anaerobic denitrification in the acidogenic reactor, which did not inhibit the acidogenic activities. Overall TN removal efficiency in the TPAD-BNR system was as high as 94%.

Keywords

References

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