A bioelectrochemical anaerobic digester for food waste was developed by installing an anode (−250 mV vs. Ag/AgCl) and a cathode (−550 mV vs. Ag/AgCl) inside a conventional lab-scale anaerobic digester. The performance of the bioelectrochemical anaerobic digester was investigated at different organic loading rates of 0.70-4.25 g VS/L.d. The bioelectrochemical anaerobic digester was rapidly stabilized within 25 days after start up, and at an organic loading rate of less than 1.97 g VS/L.d., state variables such as pH (7.0-7.8) and alkalinity (10-12 g/L as CaCO3) were very stable. The volatile fatty acids were maintained at 400-500 mg HAc/L with their main component being acetic acid (80%). At an organic loading rate of 1.97 g VS/L.d, the performance was significantly high in terms of the specific methane production rate (1.37 L CH4/L.d) and the methane content in the biogas (around 74%). The removal efficiencies of volatile solid and chemical oxygen demand were also as high as 80.1% and 85.1%, respectively, and the overall energy efficiency was 91.2%. However, the process stability deteriorated at an organic loading rate of 4.25 g VS/L.d.

I. 서 론
 II. 실험재료 및 방법
  1. 생물전기화학 혐기성소화조
  2. 산화전극 및 환원전극의 준비
  3. 생물전기화학 혐기성 반응조의 운전
  4. 분석 및 계산
 III. 결과 및 고찰
  1. 생물전기화학 혐기성소화조의 상태변수(pH, 알칼리도, VFAs)
  2. 메탄발생량과 유기물감량
  3. 순환전압전류곡선 및 에너지효율
 IV. 결 론
 References

• 송영채(한국해양대학교 환경공학과) | Young-Chae Song Corresponding Author
• 윤형선(한국해양대학교 환경공학과) | Hyung-Sun Yoon