Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Effect of Effluent Recirculation and Internal Return on the Performance of UASB Process

유출수 재순환 및 내부반송이 UASB 반응조 운전효율에 미치는 영향

  • Kim, Jin-Hyok (Department of Environmental Engineering, Chungbuk National University) ;
  • Han, Seong-Kuk (Department of Environmental Engineering, Chungbuk National University) ;
  • Kwon, Oh-Hoon (Department of Environmental Engineering, Chungbuk National University) ;
  • Yoon, Kyung-Jin (Department of Environmental Engineering, Chungbuk National University) ;
  • Kim, Jae-Yong (Department of Environmental Engineering, Chungbuk National University)
  • 김진혁 (충북대학교 환경공학과) ;
  • 한성국 (충북대학교 환경공학과) ;
  • 권오훈 (충북대학교 환경공학과) ;
  • 윤경진 (충북대학교 환경공학과) ;
  • 김재용 (충북대학교 환경공학과)
  • Received : 2011.01.04
  • Accepted : 2011.03.16
  • Published : 2011.04.10
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Abstract

Dumping of wastes at sea will be strongly prohibited from 2012 by London Dumping Convention. So, finding the method for treatment of food waste at ground is needed urgently. The solution for above mentioned problem is the resource development from food waste leachate by using Upflow Anaerobic Sludge Blanket (UASB) process. In this research, we try to find out the effect of effluent recirculation and internal return influence on organic removal efficiency and biogas production. Laboratory investigation was conducted for 25 days with only internal recycling, and then, effluent recirculation was performed. As the result of experiments, the organic removal efficiency was above 90%, and the content of methane was 78~80% during operating time. Also, when UASB reactor was operated to over the 3 Q effluent recirculation, there was not 1 N-NaOH consumption any more, therethrough the experiment was economically and stably carried out.

런던협약에 의해 2012년부터는 폐기물 해양투기가 전면 금지될 것이다. 따라서 지상에서의 음식폐기물 처리방법의 모색이 시급한 실정이다. 위 문제의 해결방안은 UASB 공법을 이용하여 음폐수로부터 자원화개발을 하는 것이다. 본 연구에서는 유출수의 재순환 및 내부반송이 유기물 제거효율과 바이오 가스 생성에 미치는 영향을 알아보았다. 25일 동안은 내부순환만 실시하였고, 그 후엔 유출수 재순환을 실시하였다. 실험 결과 운전기간동안 유기물 제거효율은 90% 이상으로 나타났고, 메탄수율은 78~80%로 나타났다. 또한, 유출수 반송을 3 Q 이상으로 반송하여 운전할 경우 수산화나트륨(1 N)의 소모가 없었고, 그 결과 경제적이며 안정적인 운전을 할 수 있었다.

Keywords

Acknowledgement

Supported by : 충북대학교

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