Revealing the mechanisms of alkali-based magnetic nanosheets enhanced hydrogen production from dark fermentation: Comparison between mesophilic and thermophilic conditions

Nickel–Cobalt Oxide Nanoparticle-Induced Biohydrogen Production

“…Table 3 provides the increased value of different materials on the total bioH 2 yield when DF was performed with glucose as substrate, indicating that this experiment was at a higher level of bioH 2 synthesis. 21,24,25,36 Cao et al 21 used alkali-based magnetic nanosheets (AMNSs) (100 mg/L) to increase H 2 yield via DF and obtained the highest yield of 232.8 mL/g glucose, being lower than that (259.67 mL/g glucose) from this work. 21 Similarly, Sun et al 25 obtained the largest H 2 yield of 272.2 mL/g glucose amended by 400 mg/L manganese ferrite NPs, which was slightly higher than that of this study.…”

“…A previous work reported that NPs may attach to bacteria and interact with structural proteins on the membrane in bioH 2 synthesis via DF. 21,36 A further increase in NiCo 2 O 4 NPs (more than 400 mg/L) resulted in a decrease in H 2 yield. The production of H 2 was 188.14 mL/g glucose when the dosage of NiCo 2 O 4 NPs up to 800 mg/L, which reduced to 97% of the control yield.…”

Hydroxyapatite Fabrication for Enhancing Biohydrogen Production from Glucose Dark Fermentation

“…SMPs are the main components of bioH 2 production from anaerobically fermented organic matter and can be used to evaluate the degradation efficiency of SMPs. 21 Dark fermentation for bioH 2 production has been conducted using glucose as a substrate, with EtOH, butyrate (HBu), acetate (HAc), and propionate (HPr) as the main products. 30 Figure 1 c depicts the variation in the yield of SMPs in the reactor, which correlates with the biological evolution of bioH 2 .…”

“…The VFAs, pH, 16S rRNA, and EEM were tested in the same way. 21 16S rRNA gene sequencing was performed using Illumina MiSeq high-throughput sequencing technology for the reactors at the end of H 2 production, and the sequences were resolved at the genus level to analyze HPB diversity. 20 Further, the sludge with HA samples was processed and collected after fermentation.…”

“…The samples were passed through a 0.45 μm filtration membrane, and the concentrations of Ca and P in the filtered samples were assayed with inductively coupled plasma (ICP, Optima). The VFAs, pH, 16S rRNA, and EEM were tested in the same way . 16S rRNA gene sequencing was performed using Illumina MiSeq high-throughput sequencing technology for the reactors at the end of H 2 production, and the sequences were resolved at the genus level to analyze HPB diversity .…”