Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6687164 | Applied Energy | 2015 | 11 Pages |
Abstract
The influence of surfactant addition on the hydrogen fermentative of the organic fraction of municipal solid waste was extensively investigated under thermophilic conditions (55 ± 2 °C) in batch cultures. The addition of Tween 80® (T80) and polyethylene glycol (PEG 6000®) substantially improved hydrogen yields (HYs) resulting in 109.9 ± 7.1 and 113.8 ± 7.7 mlH2/gCarb.initial at T80 and PEG 6000® concentrations not exceeding 2.8% and 16.7 g/L, respectively. A combination of 2.8% T80 with 1.7 g/L PEG 6000® achieved slightly higher HYs of 116.7 ± 5.2 mlH2/gCarb.initial. An artificial neural network model reliably represented the relationship between the surfactant concentration and hydrogen production with a correlation coefficient (R2) of 0.980. Microbial community analysis of the batches supplemented with 2.8% T80 and 1.7 g/L PEG 6000® showed the dominance of the hydrogen-producing bacteria Enterobacter, Escherichia, Buttiauxella, and Pantoea. The study confirms the potential of surfactant addition for H2 production from wastes containing organics in a particulate form.
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Authors
M. Elsamadony, A. Tawfik, M. Suzuki,