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Your search keyword '"Guillermina Hernandez-Raquet"' showing total 2 results
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2. Enrichment and adaptation yield high anammox conversion rates under low temperatures

Author

M. Caligaris, Guillermina Hernandez-Raquet, G. Gaval, Siegfried E. Vlaeminck, Mathieu Spérandio, B. Barillon, S. Dubos, Yolaine Bessiere, I. Mozo, P. De Cocker, Laboratoire d'Ingénierie des Systèmes Biologiques et des Procédés (LISBP), Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National de la Recherche Agronomique (INRA), CIRSEE, Suez, Center for Microbial Ecology and Technology (CMET), Ghent University, Treatment Infrastructures, Research Group of Sustainable Energy, Air and Water Technology, University of Antwerp, ANRT (CIFRE) [2014/0754], Institut National de la Recherche Agronomique (INRA)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), Centre International de Recherche Sur l'Eau et l'Environnement [Suez] (CIRSEE), SUEZ ENVIRONNEMENT (FRANCE), Universiteit Gent = Ghent University (UGENT), University of Antwerp (UA), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), and Universiteit Gent = Ghent University [Belgium] (UGENT)

Subjects
[SDV.BIO]Life Sciences [q-bio]/Biotechnology, Environmental Engineering, Denitrification, Nitrogen, Microorganism, 0208 environmental biotechnology, chemistry.chemical_element, bioréacteur, Bioengineering, 02 engineering and technology, 010501 environmental sciences, Biology, 01 natural sciences, chemistry.chemical_compound, Bioreactors, Ammonium Compounds, séquençage, Bioreactor, Ammonium, biological nitrogen removal, Waste Management and Disposal, shortcut nitrogen removal, 0105 earth and related environmental sciences, bactérie, Renewable Energy, Sustainability and the Environment, Physics, Temperature, Environmental engineering, General Medicine, bacterium, cold anammox, Anoxic waters, réacteur anaérobie, 020801 environmental engineering, Activated sludge, chemistry, microbial community structure, Anammox, Oxidation-Reduction, Engineering sciences. Technology, Nuclear chemistry
Abstract

This study compared two anammox sequencing batch reactors (SBR) for one year. SBRconstantT was kept at 30 degrees C while temperature in SBRloweringT was decreased step-wise from 30 degrees C to 20 degrees C and 15 degrees C followed by over 140 days at 12.5 degrees C and 10 degrees C. High retention of anammox bacteria (AnAOB) and minimization of competition with AnAOB were key. 5-L anoxic reactors with the same inoculum were fed synthetic influent containing 25.9 mg NH4+-N/L and 34.1 mg NO2--N/L (no COD). Specific ammonium removal rates continuously increased in SBRconstantT, reaching 785 mg NH4+-N/gVSS/d, and were maintained in SBRloweringT, reaching 82.2 and 91.8 mg NH4+-N/gVSS/d at 12.5 and 10 degrees C respectively. AnAOB enrichment (increasing hzsA and 16S rDNA gene concentrations) and adaptation (shift from Ca. Brocadia to Ca. Kuenenia in SBRloweringT) contributed to these high rates. Rapidly settling granules developed, with average diameters of 1.2 (SBRconstantT) and 1.6 mm (SBRloweringT). Results reinforce the potential of anammox for mainstream applications.

Published
2018
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