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Optimization of anaerobic digestion: influence of trace elements on methanization processes
Citation Link: https://doi.org/10.15480/882.3926
Publikationstyp
Doctoral Thesis
Date Issued
2014-07
Sprache
English
Author(s)
Advisor
Referee
Title Granting Institution
Technische Universität Hamburg
Place of Title Granting Institution
Hamburg
Examination Date
2014-04-11
TORE-DOI
First published in
Number in series
87
Publisher
GFEU
Peer Reviewed
true
Optimization of Anaerobic Digestion: Influence of Trace Elements on Methanization Processes
Nickel, cobalt, selenium and molybdenum are trace elements (TEs) and activators of enzymes that produce CH4 from carbon sources; thus can be used to optimize methanization processes. Batch experiments and multivariate techniques were used to identify and quantify the main effects and interaction of these TEs during methanization for the purpose of optimizing volatile fatty acids degradation (VFA) and CH4 production. Optimal supplementation ranges were derived; supplementation approaches were evaluated and the mechanisms by which the TEs improve methanization were determined in batch methanization. Results of the batch operations were validated in semi-continuous methanization, with the additional task of increasing organic loading rate without inducing process instability and digester failure. As in the batch process, process stability and optimization aims were achieved in the semi-continuous process using our experimentally and statistically derived optimum TEs configuration.
Nickel, cobalt, selenium and molybdenum are trace elements (TEs) and activators of enzymes that produce CH4 from carbon sources; thus can be used to optimize methanization processes. Batch experiments and multivariate techniques were used to identify and quantify the main effects and interaction of these TEs during methanization for the purpose of optimizing volatile fatty acids degradation (VFA) and CH4 production. Optimal supplementation ranges were derived; supplementation approaches were evaluated and the mechanisms by which the TEs improve methanization were determined in batch methanization. Results of the batch operations were validated in semi-continuous methanization, with the additional task of increasing organic loading rate without inducing process instability and digester failure. As in the batch process, process stability and optimization aims were achieved in the semi-continuous process using our experimentally and statistically derived optimum TEs configuration.
Subjects
Trace elements
Methanization
Biocatalysis
Optimization
Conversion rate
Bioavailability
DDC Class
500: Naturwissenschaften
540: Chemie
Funding Organisations
DAAD
Publication version
publishedVersion
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e-Book PhD_Ezebuiro N. Christpeace.pdf
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11.68 MB
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