Batch dark fermentation of powdered wheat starch to hydrogen gas: Effects of the initial substrate and biomass concentrations

Fermentative hydrogen production from lipid-extracted microalgal biomass residues

“…The total VFA concentrations increased from 2.33 to 5.37 g/l, while the hydrogen yield decreased from 40.27 to 25.64 ml/g VS (Table 4) when the LMBR concentrations rose from 4.5 to 45 g VS/l. These results indicate that high concentration of VFA produced at high substrate concentrations could inhibit hydrogen production [11,19].…”

“…The hydrogen yields were also sensitive to the increase of substrate concentrations, which decreased from 40.27 to 25.64 ml/g VS when the LMBR concentrations increased from 4.5 to 45 g VS/l. The decline in the hydrogen yield with the increase of the LMBR concentrations could be explained by the fact that high substrate concentrations may result in the increase of total VFA, which may inhibit hydrogen production [11,19].…”

“…The effects of fermentation conditions such as inoculum sources [6], inoculum pretreatments [7,8], pH [9,10], inoculum and substrate concentrations [11,12] on hydrogen production have been studied. However the conditions for hydrogen production from LMBRs remain unknown.…”

Bioconversion of de-oiled Jatropha Waste (DJW) to hydrogen and methane gas by anaerobic fermentation: Influence of substrate concentration, temperature and pH

“…(2) was used to elucidate the effect of the substrate concentration in biological processes as shown in other studies [9,20,21]. The experimental data obtained at different DJW concentrations ranging from 40 to 240 g/L were fitted to the model and the kinetic constants were determined.…”

Biohydrogen using leachate from an industrial waste landfill as inoculum

“…In a recent study, sludge compost, soil and soybean meal in a silo were used as the inoculum for hydrogen fermentation [1][2][3][4][5][6]. However, there are few experimental reports of hydrogen fermentation using a leachate from waste landfill as inoculum.…”