Gentili, Francesco
- Department of Wildlife, Fish and Environmental Studies, Swedish University of Agricultural Sciences
Abstract
In this study two wet microalgae cultures and one dried microalgae culture were co-digested in different proportions with sewage sludge in mesophilic and thermophilic conditions. The aim was to evaluate if the co-digestion could lead to an increased efficiency of methane production compared to digestion of sewage sludge alone. The results showed that co-digestion with both wet and dried microalgae, in certain proportions, increased the biochemical methane potential (BMP) compared with digestion of sewage sludge alone in mesophilic conditions. The BMP was significantly higher than the calculated BMP in many of the mixtures. This synergetic effect was statistically significant in a mixture containing 63% (w/w VS based) undigested sewage sludge and 37% (w/w VS based) wet algae slurry, which produced 23% more methane than observed with undigested sewage sludge alone. The trend was that thermophilic co-digestion of microalgae and undigested sewage sludge did not give the same synergy. (C) 2014 Elsevier Ltd. All rights reserved.
Keywords
Biogas production; Co-digestion; Microalgae; Sewage sludge
Published in
Bioresource Technology
2014, volume: 171, pages: 203-210
SLU Authors
Global goals (SDG)
SDG6 Clean water and sanitation
UKÄ Subject classification
Bioenergy
Water Engineering
Publication identifier
- DOI: https://doi.org/10.1016/j.biortech.2014.08.069
Permanent link to this page (URI)
https://res.slu.se/id/publ/61040