Dosing of anaerobic granular sludge bioreactors with cobalt: Impact of cobalt retention on methanogenic activity

Type
Article

Authors
Fermoso, Fernando G.
Bartacek, Jan
Manzano, Ramon
van Leeuwen, Herman P.
Lens, Piet N.L.

KAUST Grant Number
KUK-C1-017-12

Date
2010-12

Abstract
The effect of dosing a metal limited anaerobic sludge blanket (UASB) reactor with a metal pulse on the methanogenic activity of granular sludge has thus far not been successfully modeled. The prediction of this effect is crucial in order to optimize the strategy for metal dosage and to prevent unnecessary losses of resources. This paper describes the relation between the initial immobilization of cobalt in anaerobic granular sludge cobalt dosage into the reactor and the evolution of methanogenic activity during the subsequent weeks. An operationally defined parameter (A0· B0) was found to combine the amount of cobalt immobilized instantaneously upon the pulse (B0) and the amount of cobalt immobilized within the subsequent 24. h (A0). In contrast with the individual parameters A0 and B0, the parameter A0· B0 correlated significantly with the methanogenic activity of the sludge during the subsequent 16 or 35. days. This correlation between metal retention and activity evolution is a useful tool to implement trace metal dosing strategies for biofilm-based biotechnological processes. © 2010.

Citation
Fermoso FG, Bartacek J, Manzano R, van Leeuwen HP, Lens PNL (2010) Dosing of anaerobic granular sludge bioreactors with cobalt: Impact of cobalt retention on methanogenic activity. Bioresource Technology 101: 9429–9437. Available: http://dx.doi.org/10.1016/j.biortech.2010.07.053.

Acknowledgements
This research was funded by Marie Curie Excellence "No- Grant vel biogeological engineering processes for heavy metal removal and recovery" (MEXT-CT-2003-509567), Marie Curie Intra-European Fellowships "Bioavailability of Heavy Metals in Anaerobic Granular Sludge" (MEIF-CT-2006-041896) and by Award No. KUK-C1-017-12, made by King Abdullah University of Science and Technology (KAUST).

Publisher
Elsevier BV

Journal
Bioresource Technology

DOI
10.1016/j.biortech.2010.07.053

PubMed ID
20709540

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