Journal
BIORESOURCE TECHNOLOGY
Volume 167, Issue -, Pages 510-513Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2014.06.060
Keywords
Static magnetic field; Phenol biodegradation; Rhodococcus erythropolis; Fed-batch bioreactor; Bacterial degradation enhanced
Funding
- Ministry of Education, Youth and Sports [LO1201]
- OPR&DI project Centre for Nanomaterials, Advanced Technologies and Innovation [CZ.1.05/2.1.00/01.0005]
- [LF11016]
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The aim of this study was to evaluate the impact of short-term repeated exposure to a static magnetic field (induction 370 mT) on the Rhodococcus erythropolis cells. Specifically, it was ascertained the magnetic field's potential to influence degradation of a phenol substrate, cell growth and respiration activity (oxygen consumption) during substrate biodegradation. The experiment took place over 3 days, with R. erythropolis exposed to the magnetic field for the first day. During the experiment, different recirculation rates between the reactor and the magnetic contactor has been tested. Use of the magnetic field at higher recirculation rates (residence time in contactor was less than 7 min) stimulated substrate (phenol) oxidation by around 34%; which, in turn, promoted R. erythropolis growth by around 28% by shortening the lag- and exponential-phases and increasing bacterial respiration activity by around 10%. (C) 2014 Elsevier Ltd. All rights reserved.
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