Effect of acclimation and nutrient supply on 5-tolyltriazole biodegradation with activated sludge communities.
The corrosion inhibitor 5-tolyltriazole (5-TTri) can have a detrimental impact on aquatic systems thus implying an acute need to reduce the effluent concentrations of 5-TTri. In this study, 5-TTri biodegradation was enhanced through acclimation and nutrient supply. Activated sludge communities (ASC) were setup in nine subsequent ASC generations. While generation two showed a lag phase of five days without biodegradation, generations four to nine utilized 5-TTri right after inoculation, with biodegradation rates from 3.3 to 5.2 mg L(-1)d(-1). Additionally, centrifuged AS supernatant was used to simulate the nutrient conditions in wastewater. This sludge supernatant (SS) significantly enhanced biodegradation, resulting in removal rates ranging from 3.2 to 5.0 mg L(-1)d(-1) without acclimation while the control groups without SS observed lower rates of ⩽ 2.2 mg L(-1)d(-1).
Marine Natural Products Lab, Duffy Research Centre, University of Prince Edward Island, 550 University Avenue, Charlottetown C1A 4P3, Canada. Electronic address: b.herzog@tum.de.
Bastian
B
Herzog
Department of Civil and Environmental Engineering, Virginia Tech, 421 Durham Hall, Blacksburg, VA 24061, United States.
Heyang
H
Yuan
Bavarian Environment Agency, Bürgermeister-Ulrich-Str. 160, D-86179 Augsburg, Germany.
Hilde
H
Lemmer
Karlsruhe Institute of Technology, Engler-Bunte-Institut, Chair of Water Chemistry and Water Technology, D-76131 Karlsruhe, Germany.
Harald
H
Horn
Chair of Urban Water Systems Engineering, Technische Universität München, Am Coulombwall, D-85748 Garching, Germany.
Elisabeth
E
Müller
D001673:Biodegradation, Environmental; D012722:Sewage; D014230:Triazoles / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000378:metabolism
D012722:Sewage; D014230:Triazoles; D014874:Water Pollutants, Chemical; C000594832:5-tolyltriazole
5-Methyl-benzotriazole; Generation setups; Microbial consortia; Nutrient supply; Xenobiotica