Optimization of hydrogen production from food waste using anaerobic mixed cultures pretreated with waste frying oil

Razieh Rafieenia, Alberto Pivato and Maria Cristina Lavagnolo

Renewable Energy, 2019, vol. 139, issue C, 1077-1085

Abstract: The fermentation of food waste by anaerobic mixed cultures pretreated with waste frying oil (WFO) was examined in this study. Waste frying oil was used as a stressing agent to suppress hydrogenotrophic methanogens and enrich H2-producing bacteria. Lipid-rich compounds can be adsorbed onto the cell wall of some species, including methanogens, and they can reduce the permeability of the membranes and limit nutrient transport into cells. The optimization of H2 yield was performed using a three-factor, three-level Box-Behnken design method. Initial pH, pretreatment duration and waste frying oil concentration were considered the experimental factors. Pretreatment with waste frying oil decreased the production of CH4 significantly and, in turn, improved H2 accumulation. The response surface model predicted complete inhibition of methanogens with 7.74 g/L waste frying oil, an initial pH of 5.5 and a duration of 42.67 h for the pretreatment conditions. Applying these conditions led to an experimental H2 yield of 71.34 mL/gVS, which was significantly higher than that of untreated cultures (12.97 mL/gVS).

Keywords: Biohydrogen; Pretreatment; Waste frying oil; Food waste (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0960148119303179
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:139:y:2019:i:c:p:1077-1085

DOI: 10.1016/j.renene.2019.03.012

Access Statistics for this article

Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides

More articles in Renewable Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().