Chronic impact of tetracycline on nitrification kinetics and the activity of enriched nitrifying microbial culture

Katipoglu‐Yazan, Tugce; Merlin, Christophe; Pons, Marie‐Noëlle; Ubay‐Cokgor, Emine; Orhon, Derin

doi:10.1016/j.watres.2014.12.041

Cited by 56 publications

(30 citation statements)

References 28 publications

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“…The acclimated inoculum in the first step was used as a biomass seed and modified operational conditions used for acclimation of the community. After achievement of steady‐state conditions in the reactor, respirometric and molecular tests were applied …”

Section: Experimental Developmentmentioning

confidence: 99%

“…Recently, the adverse effects of SMX have been investigated at amoA and specific 16S rRNA gene/gene transcript level . However, accurate interpretation of the interactions between chemicals and microbial community requires establishing the basic relationships between process kinetics, metabolic activity and composition of microbial community …”

Section: Introductionmentioning

confidence: 99%

“…OUR, nitrogen, and COD profiles were used for the estimation of inhibition and SMX utilization kinetics. Evaluation of the modeling results were carried out accounting for the change of microbial structure and activity, which were previously reported by the authors …”

Section: Introductionmentioning

confidence: 99%

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Chronic impact of sulfamethoxazole: how does process kinetics relate to metabolic activity and composition of enriched nitrifying microbial culture?

Katipoglu‐Yazan

Ubay‐Cokgor

Orhon

2018

J of Chemical Tech & Biotech

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BACKGROUND This study investigated utilization kinetics of ammonia‐nitrogen induced by chronic sulfamethoxazole (SMX) exposure on biomass with an enriched nitrifying community. A lab‐scale activated sludge system was supplied with 100 mg COD L‐1 of peptone mixture and 50 mg N L‐1 of ammonia nitrogen at a SRT of 15 days. At steady‐state, the reactor was operated with additional daily SMX dosing of 50 mg L‐1 for 35 days. Profiles of oxygen uptake rates and nitrogen fractions obtained in respirometric/batch experiments were used for estimation of nitrification kinetics. RESULTS Acute inhibitory impact of SMX was expressed with high levels of half saturation constants and endogenous decay rates. After 35 days, half saturation constants significantly increased while higher active biomass fractions and recovered endogenous decay rates were estimated. At the end of the acclimation phase, 92% nitrification was achieved with 10 mg L‐1 SMX utilization. CONCLUSION Interpretation of modeling results with the outcomes of molecular analysis facilitated explanation of autotrophic/heterotrophic bacteria behavior in the course of SMX exposure. Removal of SMX may be attributed to co‐metabolism with ammonia oxidation and/or activity of SMX utilizing heterotrophic bacteria. © 2017 Society of Chemical Industry

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Section: Experimental Developmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Chronic impact of sulfamethoxazole: how does process kinetics relate to metabolic activity and composition of enriched nitrifying microbial culture?

Katipoglu‐Yazan

Ubay‐Cokgor

Orhon

2018

J of Chemical Tech & Biotech

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“…are based on the metabolism of microorganisms, learning whether or not antibiotic pollution may alter the right functioning of these cycles is of relevance. However, only some studies have addressed this relevant topic 32– 35 . It is true that the concentrations of antibiotics are low in most ecosystems, but even low concentrations of antibiotics may trigger specific bacterial responses 36– 39 , and analyzing such responses is a topic of interest.…”

Section: Introductionmentioning

confidence: 99%

Effect of antibiotics on bacterial populations: a multi-hierarchical selection process

Martínez

2017

F1000Res

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Antibiotics have been widely used for a number of decades for human therapy and farming production. Since a high percentage of antibiotics are discharged from the human or animal body without degradation, this means that different habitats, from the human body to river water or soils, are polluted with antibiotics. In this situation, it is expected that the variable concentration of this type of microbial inhibitor present in different ecosystems may affect the structure and the productivity of the microbiota colonizing such habitats. This effect can occur at different levels, including changes in the overall structure of the population, selection of resistant organisms, or alterations in bacterial physiology. In this review, I discuss the available information on how the presence of antibiotics may alter the microbiota and the consequences of such alterations for human health and for the activity of microbiota from different habitats.

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“…With these considerations, the biokinetic parameters and active biomass fractions must be evaluated to properly operate these systems. In this context, respirometric techniques may be useful for the microbiological analysis of such complex systems [41,44].…”

Section: Introductionmentioning

confidence: 99%

An innovative respirometric method to assess the autotrophic active fraction: Application to an alternate oxic–anoxic MBR pilot plant

Capodici

Corsino

Pippo

et al. 2016

Chemical Engineering Journal

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Chronic impact of tetracycline on nitrification kinetics and the activity of enriched nitrifying microbial culture

Cited by 56 publications

References 28 publications

Chronic impact of sulfamethoxazole: how does process kinetics relate to metabolic activity and composition of enriched nitrifying microbial culture?

Chronic impact of sulfamethoxazole: how does process kinetics relate to metabolic activity and composition of enriched nitrifying microbial culture?

Effect of antibiotics on bacterial populations: a multi-hierarchical selection process

An innovative respirometric method to assess the autotrophic active fraction: Application to an alternate oxic–anoxic MBR pilot plant

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