Jump to Main Content
Fermentative hydrogen gas production using biosolids pellets as the inoculum source
- Kalogo, Youssouf, Bagley, David M.
- Bioresource technology 2008 v.99 no.3 pp. 540-546
- anaerobic digesters, batch systems, biosolids, chemical oxygen demand, hydrogen, hydrogen production, inoculum, pellets, sludge, total solids, wastewater
- Biosolids pellets produced from anaerobically digested municipal wastewater sludge by drying to greater than 90% total solids at 110-115°C for at least 75min, were tested for their suitability as an inoculum source for fermentative hydrogen production. The hydrogen recoveries (mg gaseous H₂ produced as COD/mg added substrate COD) for glucose-fed batch systems were equal, 20.2-21.5%, between biosolids pellets and boiled anaerobic digester sludge as inoculum sources. Hydrogen recoveries from primary sludge were 2.4% and 3.5% using biosolids pellets and boiled sludge, respectively, and only 0.2% and 0.8% for municipal wastewater. Biosolids pellets should be a practical inoculum source for fermentative hydrogen reactors, although the effectiveness will depend on the wastewater treated.