지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2022.12
- 수록면
- 87 - 95 (9page)
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초록· 키워드
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Electromethanogenesis (EM) is a system that facilitates direct interspecies electron transfer (DIET) in anaerobic digestion (AD) by providing an external power supply to favor desired reactions. Substrates of AD commonly contain ammonia (NH₃) as biodegradation product of nitrogen-rich compounds that can deteriorate the stability of AD process. Optimized cathode potential (V<SUB>CAT</SUB>) and magnetite (Mag) concentration ([Mag]) are expected to improve AD efficiency in the presence of NH₃. Response surface analysis with central composite face-centered design was used in this study to investigate the effect of V<SUB>CAT</SUB> and [Mag] under different total ammonia nitrogen concentration ([TAN]). Highest cumulative methane production was achieved at V<SUB>CAT</SUB> = -737.4 mV, [Mag] = 18.2 mM, and [TAN] = 1.5 g/L; highest acetate degradation rate was achieved at V<SUB>CAT</SUB> = 757.6 mV, [Mag] = 21.4 mM, and [TAN] = 1.5 g/L. The study demonstrated that V<SUB>CAT</SUB> promotes either microbial growth or electrochemical NH₃ removal. A Shift from acetoclastic to hydrogenotrophic pathway was also observed by the increase of hydrogenotrophic methanogen populations at the end of experiment. This study is beneficial for process control of AD under different NH₃ conditions.
목차
ABSTRACT
1. Introduction
2. Material and Methods
3. Results and Discussion
4. Conclusions
References
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