In this study, the influence of the inoculum-to-substrate ratio (ISR) on dark fermentative hydrogen production from food waste (FW) was evaluated. ISR values ranging from 0.05 to 0.25 g VSinoculum/g VSsubstrate were investigated by performing batch tests at T = 39 °C and pH = 6.5, the latter being the optimal value identified based on a previous study. The ISR was found to affect the fermentation process, clearly showing that an adequate ISR is essential in order to optimise the process kinetics and the H2 yield. An ISR of 0.14 proved to optimum, leading to a maximum H2 yield of 88.8 L H2/kg VSFW and a maximum production rate of 10.8 L H2/kg VSFW∙h. The analysis of the fermentation products indicated that the observed highest H2 production mostly derived from the typical acetate/butyrate-type fermentation.

Biohydrogen production from food waste: Influence of the inoculum-to-substrate ratio / Cappai, Giovanna; De Gioannis, Giorgia; Muntoni, Aldo; Spiga, Daniela; Boni, Maria Rosaria; Polettini, Alessandra; Pomi, Raffaella; Rossi, Andreina. - In: SUSTAINABILITY. - ISSN 2071-1050. - 10:12(2018). [10.3390/su10124506]

Biohydrogen production from food waste: Influence of the inoculum-to-substrate ratio

Boni, Maria Rosaria;Polettini, Alessandra;Pomi, Raffaella;Rossi, Andreina
2018

Abstract

In this study, the influence of the inoculum-to-substrate ratio (ISR) on dark fermentative hydrogen production from food waste (FW) was evaluated. ISR values ranging from 0.05 to 0.25 g VSinoculum/g VSsubstrate were investigated by performing batch tests at T = 39 °C and pH = 6.5, the latter being the optimal value identified based on a previous study. The ISR was found to affect the fermentation process, clearly showing that an adequate ISR is essential in order to optimise the process kinetics and the H2 yield. An ISR of 0.14 proved to optimum, leading to a maximum H2 yield of 88.8 L H2/kg VSFW and a maximum production rate of 10.8 L H2/kg VSFW∙h. The analysis of the fermentation products indicated that the observed highest H2 production mostly derived from the typical acetate/butyrate-type fermentation.
2018
Biohydrogen; Dark fermentation; Food waste; Inoculum-to-substrate ratio
01 Pubblicazione su rivista::01a Articolo in rivista
Biohydrogen production from food waste: Influence of the inoculum-to-substrate ratio / Cappai, Giovanna; De Gioannis, Giorgia; Muntoni, Aldo; Spiga, Daniela; Boni, Maria Rosaria; Polettini, Alessandra; Pomi, Raffaella; Rossi, Andreina. - In: SUSTAINABILITY. - ISSN 2071-1050. - 10:12(2018). [10.3390/su10124506]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1209268
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