title: The influence of iron concentration on biohydrogen production from organic waste via anaerobic fermentation.
abstract: Different micronutrients are essential for bacterial fermentative metabolism. In particular, some metallic ions, like iron, are able to affect the biological H₂production. In this study, batch tests were carried out in stirred reactors to investigate the effects of Fe²⁺ concentration on fermentative H₂production from two different organic fractions of waste: source-separated organic waste (OW) from a composting plant including organic fraction of municipal solid waste and food waste (FW) from a refectory. Iron supplementation at 1000 mg/L caused twofold increment in the cumulative H₂production from OW (922 mL) compared with the control (without iron doping). The highest H₂production (1736 mL) from FW occurred when Fe²⁺ concentration was equal to 50 mg/L. In addition, the process production from OW was modelled through the modified Gompertz equation. For FW, a translated Gompertz equation was used by the authors, because the initial lag-time for H₂production from FW was almost negligible.
authors.affiliation: a Department of Civil and Environmental Engineering , Sapienza University of Rome , Via Eudossiana 18, Rome 00184 , Italy.
authors.forename: M R
authors.initials: MR
authors.lastname: Boni
authors.forename: S
authors.initials: S
authors.lastname: Sbaffoni
authors.forename: L
authors.initials: L
authors.lastname: Tuccinardi
mesh_terms: D000693:Anaerobiosis; D019149:Bioreactors; D002245:Carbon Dioxide / Q000378:metabolism; D005232:Fatty Acids, Volatile / Q000378:metabolism; D005285:Fermentation; D006859:Hydrogen / Q000378:metabolism*; D007501:Iron; D008697:Methane / Q000378:metabolism; D062611:Solid Waste
chemical_list: D005232:Fatty Acids, Volatile; D062611:Solid Waste; D002245:Carbon Dioxide; D006859:Hydrogen; D007501:Iron; D008697:Methane
keywords: anaerobic digestion; biohydrogen; iron; organic waste; waste treatment