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Temperature modulates stress response in mainstream anammox reactors.
Niederdorfer, Robert; Hausherr, Damian; Palomo, Alejandro; Wei, Jing; Magyar, Paul; Smets, Barth F; Joss, Adriano; Bürgmann, Helmut.
Afiliación
  • Niederdorfer R; Eawag, Swiss Federal Institute for Aquatic Science and Technology, Department of Surface Waters-Research and Management, 6047, Kastanienbaum, Switzerland. robert.niederdorfer@eawag.ch.
  • Hausherr D; Eawag, Swiss Federal Institute for Aquatic Science and Technology, Department of Process Engineering, 8600, Duebendorf, Switzerland.
  • Palomo A; Department of Environmental Engineering, Technical University of Denmark, Kgs Lyngby, Denmark.
  • Wei J; Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Air Pollution & Environmental Technology, 8600, Duebendorf, Switzerland.
  • Magyar P; Department of Environmental Sciences, University of Basel, Basel, Switzerland.
  • Smets BF; Department of Environmental Engineering, Technical University of Denmark, Kgs Lyngby, Denmark.
  • Joss A; Eawag, Swiss Federal Institute for Aquatic Science and Technology, Department of Process Engineering, 8600, Duebendorf, Switzerland.
  • Bürgmann H; Eawag, Swiss Federal Institute for Aquatic Science and Technology, Department of Surface Waters-Research and Management, 6047, Kastanienbaum, Switzerland.
Commun Biol ; 4(1): 23, 2021 01 04.
Article en En | MEDLINE | ID: mdl-33398049
Autotrophic nitrogen removal by anaerobic ammonium oxidizing (anammox) bacteria is an energy-efficient nitrogen removal process in wastewater treatment. However, full-scale deployment under mainstream conditions remains challenging for practitioners due to the high stress susceptibility of anammox bacteria towards fluctuations in dissolved oxygen (DO) and temperature. Here, we investigated the response of microbial biofilms with verified anammox activity to DO shocks under 20 °C and 14 °C. While pulse disturbances of 0.3 mg L-1 DO prompted only moderate declines in the NH4+ removal rates, 1.0 mg L-1 DO led to complete but reversible inhibition of the NH4+ removal activity in all reactors. Genome-centric metagenomics and metatranscriptomics were used to investigate the stress response on various biological levels. We show that temperature regime and strength of DO perturbations induced divergent responses from the process level down to the transcriptional profile of individual taxa. Community-wide gene expression differed significantly depending on the temperature regime in all reactors, and we found a noticeable impact of DO disturbances on genes involved in transcription, translation, replication and posttranslational modification at 20 °C but not 14 °C. Genome-centric analysis revealed that different anammox species and other key biofilm taxa differed in their transcriptional responses to distinct temperature regimes and DO disturbances.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Estrés Fisiológico / Transcripción Genética / Purificación del Agua / Reactores Biológicos / Consorcios Microbianos Idioma: En Revista: Commun Biol Año: 2021 Tipo del documento: Article País de afiliación: Suiza Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Estrés Fisiológico / Transcripción Genética / Purificación del Agua / Reactores Biológicos / Consorcios Microbianos Idioma: En Revista: Commun Biol Año: 2021 Tipo del documento: Article País de afiliación: Suiza Pais de publicación: Reino Unido