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Rodrigo Quejigo, J. ; Tejedor-Sanz, S.* ; Schroll, R. ; Esteve-Núñez, A.*

Electrodes boost microbial metabolism to mineralize antibiotics in manure.

Bioelectrochem. 128, 283-290 (2019)
Postprint DOI
Open Access Green
Livestock manures are potential sources of antibiotics in the environment. Sulfamethazine (SMZ), frequently used in veterinary medicine, can enter the environment by using manure as soil fertilizer due to its incomplete absorption in the animal gut and its unmetabolized excretion. The objective of this study was to evaluate the mineralization of C-14-labelled SMZ in manure under a new redox scenario provided by microbial electrochemical reactors, termed microbial electroremediating cells (MERC). These devices aim to overcome the electron acceptor limitation in bacterial oxidative metabolism by means of using electrodes to enhance the biodegradation of pollutants in the environment. Our results revealed that the total degradation of C-14-SMZ reached 43.5% in short term batch laboratory scale experiments under reducing conditions (-400 mV vs. Ag/AgCl). Actually, SMZ mineralization was enhanced up to 10-fold in the early stages (after 2 weeks) in comparison with an electrode-free natural attenuation assay. Moreover, mineralization showed a dependence on electrode potential, with negligible results for conditions set to +400 mV vs Ag/AgCl. The impact of merging electrodes and microorganisms for manure bioremediation suggests a promising future for this emerging technology to treat polluted livestock wastes and prevent soil and groundwater pollution. (C) 2019 Published by Elsevier B.V.
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Publication type Article: Journal article
Document type Scientific Article
Keywords Bioremediation ; Microbial Fuel Cell ; Microbial Electrochemical Technologies ; Sulfamethazine ; Manure ; Antibiotic; Swine Waste-water; Veterinary Antibiotics; Anaerobic-digestion; Sulfamethazine; Soil; Sulfonamides; Removal; Biodegradation; Chlortetracycline; Bioremediation
ISSN (print) / ISBN 1567-5394
e-ISSN 0302-4598
Quellenangaben Volume: 128, Issue: , Pages: 283-290 Article Number: , Supplement: ,
Publisher Elsevier
Publishing Place Oxford [u.a.]
Reviewing status Peer reviewed
Institute(s) Institute of Network Biology (INET)