 Can two-stage instead of one-stage anaerobic digestion really increase energy recovery from biomass?A. Schievano, A. Tenca, S. Lonati, E. Manzini and F. Adani Applied Energy, 2014, vol. 124, issue C, 335-342 Abstract: The supremacy of two-stage on traditional one-stage anaerobic digestion (AD), in terms of overall energy recovery (ER) from biomass has often been proved. However, the process conditions ensuring this result, as well as the reasons for higher efficiency, have always been unclear. In this work, a new standardized approach is proposed: optimization at lab-scale of both hydrogen and methane generation processes allowed comparing the maximum potential ER of both two-stage (as H2+CH4) and one-stage AD (as CH4). Relatively high bio-hydrogen yields were obtained testing four different organic substrates (ER of 1–1.6MJkg−1VS-added). Biomethane generation resulted in ER in the range of 9–19MJkg−1VS-added., similarly for two-stage and one-stage systems. The overall ER resulted in significantly higher (8%–43%) for the two-stage in the large majority of experimental conditions and never significantly lower. These preliminary results should drive further research to better understand the conditions that can drive the two-stage AD to higher performance. Keywords: Two-stage anaerobic digestion; Bio-hydrogen; Bio-methane; Biomass; Bioenergy (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:124:y:2014:i:c:p:335-342 Ordering information: This journal article can be ordered from DOI: 10.1016/j.apenergy.2014.03.024 Access Statistics for this article Applied Energy is currently edited by J. Yan More articles in Applied Energy from Elsevier |
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