Effect of storage time and temperature on hydrogen fermentation of food waste. (4th February 2020)

• Record Type: Journal Article
• Authors: Im, Seongwon; Lee, Mo-Kwon; Yun, Yeo-Myeong; Cho, Si-Kyung; Kim, Dong-Hoon
• Is Part Of: International journal of hydrogen energy. Volume 45:Number 6(2020)
• Page Start: 3769
• Page End: 3775
• Publication Date: 2020-02-04
• Subjects: H2 fermentation -- Food waste -- Storage condition -- Lactic acid bacteria -- Metabolic flux balance; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2019.06.215
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Practically, before being fed to the treatment plant, food waste (FW) is stored for up to a week in a storage tank under ambient temperature condition, which would have an impact on the bioenergy yield. In the present work, FW was stored at different temperatures (5 °C, 20 °C, and 35 °C) for 0 d, 1 d, and 2 d, and it was used as a feedstock for mesophilic H2 fermentation. H2 production curves were divided by three groups, finally attaining 1.7–1.8 mol H2 /mol hexoseadded, 1.4–1.5 mol H2 /mol hexoseadded, and 1.2 mol H2 /mol hexoseadded, achieved from the (fresh, FW stored at 5 °C), (FW stored at 20 °C, and 35 °C for 1 d), and (FW stored at 35 °C for 2 d), respectively. The different performance was attributed to the growth of indigenous lactic acid bacteria such as Lactobacillus and Weissella during storage under high temperature condition. In addition, it was found that the activity of homoacetogenic reaction (R17, 4H2 + CO2 → Acetate) calculated by establishing metabolic flux balance was different depending on the H2 production performance. The flux of R17 ranged 0.03–0.06 under low H2 yield achieved conditions, while it increased to 0.10–0.17 those showing low H2 yields. Highlights: Effect of food waste storage condition on hydrogen fermentation. No detrimental effect when food waste was stored at 5 °C. Drop of H2 yield by 20–30% when food waste was stored at 20 °C and 35 °C. Growth of indigenous lactic acid bacteria under high temperature condition. Homoacetogenic reaction increased where low performance was achieved.