Enhanced biohydrogen production with low graphene oxide content using thermophilic bioreactors.

Authors :: Vemuri B
Handa V
Jawaharraj K
Sani R
Gadhamshetty V
Source :: Bioresource technology [Bioresour Technol] 2022 Feb; Vol. 346, pp. 126574. Date of Electronic Publication: 2021 Dec 16.
Publication Year :: 2022
Abstract: Modern society envisions hydrogen (H <subscript>2</subscript> ) fuel to drive the transportation, industrial, and domestic sectors. Here, we explore use of graphene oxide nanoparticles (GO NPs) for greatly enhancing bio-H <subscript>2</subscript> production by a consortium based on Thermoanaerobacterium thermosaccharolyticum spp. Thermophilic batch bioreactors were set up at 60 <superscript>O</superscript> C and initial pH of 8.5 to assess the effects of GO NPs supplements on biohydrogen production. Under optimal GO NPs loading of 10 mg/L, the supplemented system yielded ∼ 300% higher H <subscript>2</subscript> yield (6.78 mol H <subscript>2</subscript> /mol sucrose) than control. Such an optimized system offered 73% H <subscript>2</subscript> purity and 85% conversion efficiency by promoted the desirable acetate fermentation pathway. Miseq Illumina sequencing tests revealed that the optimal levels of GO NPs did not alter the microbial composition of consortium.<br /> (Copyright © 2021 Elsevier Ltd. All rights reserved.)

Full Text Access

Tools