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Microbiota adaptation after an alkaline pH perturbation in a full-scale UASB anaerobic reactor treating dairy wastewater.
Callejas, Cecilia; Fernández, Alfonsina; Passeggi, Mauricio; Wenzel, Jorge; Bovio, Patricia; Borzacconi, Liliana; Etchebehere, Claudia.
Afiliación
  • Callejas C; BIOPROA, Faculty of Engineering, Institute of Chemical Engineering, Universidad de La República, Herrera y Reissig 565, Montevideo, Uruguay. ceciliac@fing.edu.uy.
  • Fernández A; BIOPROA, Faculty of Engineering, Institute of Chemical Engineering, Universidad de La República, Herrera y Reissig 565, Montevideo, Uruguay.
  • Passeggi M; BIOPROA, Faculty of Engineering, Institute of Chemical Engineering, Universidad de La República, Herrera y Reissig 565, Montevideo, Uruguay.
  • Wenzel J; Microbial Ecology Laboratory, BioGem Department, Biological Research Institute Clemente Estable, Ministry of Education, Av. Italia, 3318, Montevideo, Uruguay.
  • Bovio P; Microbial Ecology Laboratory, BioGem Department, Biological Research Institute Clemente Estable, Ministry of Education, Av. Italia, 3318, Montevideo, Uruguay.
  • Borzacconi L; BIOPROA, Faculty of Engineering, Institute of Chemical Engineering, Universidad de La República, Herrera y Reissig 565, Montevideo, Uruguay.
  • Etchebehere C; Microbial Ecology Laboratory, BioGem Department, Biological Research Institute Clemente Estable, Ministry of Education, Av. Italia, 3318, Montevideo, Uruguay.
Bioprocess Biosyst Eng ; 42(12): 2035-2046, 2019 Dec.
Article en En | MEDLINE | ID: mdl-31506821
The aim of this study was to understand how the microbial community adapted to changes, including a pH perturbation, occurring during the start-up and operation processes in a full-scale methanogenic UASB reactor designed to treat dairy wastewater. The reactor performance, prokaryotic community, and lipid degradation capacity were monitored over a 9-month period. The methanogenic community was studied by mcrA/mrtA gene copy-number quantification and methanogenic activity tests. A diverse prokaryotic community characterized the seeding sludge as assessed by sequencing the V4 region of the 16S rRNA gene. As the feeding began, the bacterial community was dominated by Firmicutes, Synergistetes, and Proteobacteria phyla. After an accidental pH increase that affected the microbial community structure, a sharp increase in the relative abundance of Clostridia and a decrease in the mcrA/mrtA gene copy number and methanogenic activity were observed. After a recovery period, the microbial population regained diversity and methanogenic activity. Alkaline shocks are likely to happen in dairy wastewater treatment because of the caustic soda usage. In this work, the plasticity of the prokaryotic community was key to surviving changes to the external environment and supporting biogas production in the reactor.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Aguas del Alcantarillado / Microbiología del Agua / Eliminación de Residuos Líquidos / Purificación del Agua / Reactores Biológicos Idioma: En Revista: Bioprocess Biosyst Eng Asunto de la revista: BIOTECNOLOGIA / ENGENHARIA BIOMEDICA Año: 2019 Tipo del documento: Article País de afiliación: Uruguay Pais de publicación: Alemania
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Aguas del Alcantarillado / Microbiología del Agua / Eliminación de Residuos Líquidos / Purificación del Agua / Reactores Biológicos Idioma: En Revista: Bioprocess Biosyst Eng Asunto de la revista: BIOTECNOLOGIA / ENGENHARIA BIOMEDICA Año: 2019 Tipo del documento: Article País de afiliación: Uruguay Pais de publicación: Alemania