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Biohydrogen production from food waste: Current status, limitations, and future perspectives
Yun, Yeo-Myeong,Lee, Mo-Kwon,Im, Seong-Won,Marone, Antonella,Trably, Eric,Shin, Sang-Ryong,Kim, Min-Gyun,Cho, Si-Kyung,Kim, Dong-Hoon Elsevier Applied Science 2018 Bioresource technology Vol.248 No.1
<P><B>Abstract</B></P> <P>Among the various biological routes for H<SUB>2</SUB> production, dark fermentation is considered the most practically applicable owing to its capability to degrade organic wastes and high H<SUB>2</SUB> production rate. Food waste (FW) has high carbohydrate content and easily hydrolysable in nature, exhibiting higher H<SUB>2</SUB> production potential than that of other organic wastes. In this review article, first, the current status of H<SUB>2</SUB> production from FW by dark fermentation and the strategies applied for enhanced performance are briefly summarized. Then, the technical and economic limitations of dark fermentation of FW are thoroughly discussed. Economic assessment revealed that the economic feasibility of H<SUB>2</SUB> production from FW by dark fermentation is questionable. Current efforts to further increase H<SUB>2</SUB> yield and waste removal efficiency are also introduced. Finally, future perspectives along with possible routes converting dark fermentation effluent to valuable fuels and chemicals are discussed.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Critical reviews on dark fermentation of food waste (FW). </LI> <LI> Current status of dark fermentation with strategies applied for enhancement. </LI> <LI> Technical and economical limitation of dark fermentation performance of FW. </LI> <LI> Strategies to increase H<SUB>2</SUB> yield and gain more energy. </LI> <LI> Integrated system converting fermentation effluent to various fuels and chemicals. </LI> </UL> </P>