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논문 기본 정보

자료유형
학술저널
저자정보
Arma Yulisa (Pohang University of Science and Technology (POSTECH)) Joonyeob Lee (Pukyong National University) Sang Hyeok Park (Pohang University of Science and Technology (POSTECH)) Seokhwan Hwang (Pohang University of Science and Technology)
저널정보
대한환경공학회 Environmental Engineering Research Environmental Engineering Research 제27권 제6호
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.

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ABSTRACT
1. Introduction
2. Material and Methods
3. Results and Discussion
4. Conclusions
References

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UCI(KEPA) : I410-ECN-0101-2022-539-000210673