혐기성 수소발효를 결합한 생물학적 2단공정의 유기성폐자원 처리 및 바이오에너지 생산

Abstract

This study was performed to investigate the application of dark H2 fermentation to two-stage bioprocesses for organic waste treatment and energy production. We reviewed information about the two-stage bioprocesses combining dark H2 fermentation with CH4 fermentation, photo H2 fermentation, microbial fuel cells (MFCs), or microbial electrolysis cells (MECs) by using academic information databases and university libraries. Dark fermentative bacteria use organic waste as the sole source of electrons and energy, converting it into H2. The reactions related to dark H2 fermentation are rapid and do not require sunlight, making them useful for treating organic waste. However, the degradation is not complete and organic acids remain. Thus, dark H2 fermentation should be combined with a post-treatment process, such as CH4 fermentation, photo H2 fermentation, MFCs, or MECs. So far, dark H2 fermentation followed by CH4 fermentation is a promising two-stage bioprocess among them. However, if the problems of manufacturing expenses, operational cost, scale-up, and practical applications will be solved, the two-stage bioprocesses combining dark H2 fermentation with photo H2 fermentation, MFCs, or MECs have also infinite potential in organic waste treatment and energy production. This paper demonstrated the feasibility of two-stage bioprocesses combining dark H2 fermentation as a novel system for organic waste treatment and energy