Peer-Reviewed Journal Details
Mandatory Fields
Paolo Dess, Estefania Porca, Nicholas R. Waters, Aino-Maija Lakaniemi, Gavin Collins, Piet N. L. Lens
2018
March
International Journal Of Hydrogen Energy
Thermophilic versus mesophilic dark fermentation in xylose-fed fluidised bed reactors: Biohydrogen production and active microbial community
Published
()
Optional Fields
Active community; Biohydrogen; FBR; MiSeq; Thermoanaerobacterium; Thermophilic
43
11
5473
5485
Dark fermentative biohydrogen production in a thermophilic, xylose-fed (50 mM) fluidised bed reactor (FBR) was evaluated in the temperature range 5570 C with 5-degree increments and compared with a mesophilic FBR operated constantly at 37 C. A significantly higher (p = 0.05) H2 yield was obtained in the thermophilic FBR, which stabilised at about 1.2 mol H2 mol−1 xylose (36% of the theoretical maximum) at 55 and 70 C, and at 0.8 mol H2 mol−1 xylose at 60 and 65 C, compared to the mesophilic FBR (0.5 mol H2 mol−1 xylose). High-throughput sequencing of the reverse-transcribed 16S rRNA, done for the first time on biohydrogen producing reactors, indicated that Thermoanaerobacterium was the prevalent active microorganism in the thermophilic FBR, regardless of the operating temperature. The active microbial community in the mesophilic FBR was mainly composed of Clostridium and Ruminiclostridium at 37C. Thermophilic dark fermentation was shown to be suitable for treatment of high temperature, xylose-containing wastewaters, as it resulted in a higher energy output compared to the mesophilic counterpart.
https://www.sciencedirect.com/science/article/pii/S036031991830301X#kwrds0010
doi.org/10.1016/j.ijhydene.2018.01.158
Grant Details
Publication Themes
Environment, Marine and Energy