Long-term bio-H2 and bio-CH4 production from food waste in a continuous two-stage system: Energy efficiency and conversion pathways. (January 2018)

• Record Type: Journal Article
• Authors: Algapani, Dalal E.; Qiao, Wei; di Pumpo, Francesca; Bianchi, David; Wandera, Simon M.; Adani, Fabrizio; Dong, Renjie
• Is Part Of: Bioresource technology. Volume 248:Part A(2018)
• Page Start: 204
• Page End: 213
• Publication Date: 2018-01
• Subjects: Food waste -- Long-term experiment -- Hydrogen and methane -- Two-stage process; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2017.05.164
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: The continuous bio-H2 and bio-CH4 production was sustainable in long term. The optimized bio-H2 and bio-CH4 production parameters was obtained. The methane production was supposed to through SAO-HM pathway. Abstract: Anaerobic digestion is a well-established technology for treating organic waste, but it is still under challenge for food waste due to process stability problems. In this work, continuous H2 and CH4 production from canteen food waste (FW) in a two-stage system were successfully established by optimizing process parameters. The optimal hydraulic retention time was 5 d for H2 and 15 d for CH4 . Overall, around 59% of the total COD in FW was converted into H2 (4%) and into CH4 (55%). The fluctuations of FW characteristics did not significantly affect process performance. From the energy point view, the H2 reactor contributed much less than the methane reactor to total energy balance, but it played a key role in maintaining the stability of anaerobic treatment of food waste. Microbial characterization indicated that methane formation was through syntrophic acetate oxidation combined with hydrogenotrophic methanogenesis pathway.