Saline conditions effect on the performance and stress index of anaerobic ammonium oxidizing (anammox) bacteria
| Autor: | Victory Fiifi Dsane, Taeseok Oh, Jiyun Hwang, Sumin An, Younggyun Choi, Yuri Choi |
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| Rok vydání: | 2020 |
| Předmět: |
Environmental Engineering
Nitrogen Health Toxicology and Mutagenesis 0208 environmental biotechnology Sequencing batch reactor 02 engineering and technology 010501 environmental sciences 01 natural sciences Acclimatization chemistry.chemical_compound Bacteria Anaerobic Bioreactors Ammonium Compounds Bioreactor Environmental Chemistry Ammonium Food science Anaerobiosis 0105 earth and related environmental sciences Bacteria Sewage Chemistry Public Health Environmental and Occupational Health General Medicine General Chemistry Pollution 020801 environmental engineering Salinity Microbial population biology Anammox Anaerobic exercise Oxidation-Reduction |
| Zdroj: | Chemosphere. 267 |
| ISSN: | 1879-1298 |
| Popis: | In this study, a lab-scale sequencing batch reactor dominated by freshwater anammox bacteria (FAB) was used to study the performance and stress index of the anammox bacteria at various saline conditions. The reactor with an effective volume of 1.8 L was operated for about 160 days. The nitrogen-loading rate was maintained at 0.364 kg-N m−3d−1 throughout the operational period. At the start-up phase, the seed biomass acclimation to the lab bioreactor showed an inconsistent performance. However, a stable performance was observed after day 38. The average substrate removal efficiency was 92% during most of the operational period. Anammox stress index; a ratio of dissolved Adenosine Triphosphate (dATPamx) to total Adenosine Triphosphate (tATPamx) showed an irrefutable correlation between NaCl concentration, anammox stress and microbial community. A drop in the biomass cellular ATP at 5 g L−1 salinity led to a significant decrease in the Specific Anammox activity. Candidatus Brocadia was identified as the main anammox species and its relative abundance reduced along the stepwise salinity increment. |
| Databáze: | OpenAIRE |
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