Citric acid application for denitrification process support in biofilm reactor
| Autor: | Slawomir Ciesielski, Artur Mielcarek, Arthur Thornton, Dorota Dabrowska, Wojciech Janczukowicz, Joanna Struk-Sokołowska, Joanna Rodziewicz |
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| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Environmental Engineering Denitrification Formates Health Toxicology and Mutagenesis Microorganism Acetates 010501 environmental sciences Bacterial Physiological Phenomena 01 natural sciences Citric Acid 03 medical and health sciences Denitrifying bacteria chemistry.chemical_compound Bioreactors Bioreactor Environmental Chemistry Formate Biomass Food science 0105 earth and related environmental sciences Bacteria biology Public Health Environmental and Occupational Health General Medicine General Chemistry biology.organism_classification Pollution 030104 developmental biology Biochemistry chemistry Biofilms Citric acid Flavobacterium |
| Zdroj: | Chemosphere. 171:512-519 |
| ISSN: | 0045-6535 |
| Popis: | The study demonstrated that citric acid, as an organic carbon source, can improve denitrification in Anaerobic Sequencing Batch Biofilm Reactor (AnSBBR). The consumption rate of the organic substrate and the denitrification rate were lower during the period of the reactor's acclimatization (cycles 1–60; 71.5 mgCOD L−1 h−1 and 17.81 mgN L−1 h−1, respectively) than under the steady state conditions (cycles 61–180; 143.8 mgCOD L−1 h−1 and 24.38 mgN L−1 h−1). The biomass yield coefficient reached 0.04 ± 0.02 mgTSS· mgCODre−1 (0.22 ± 0.09 mgTSS mgNre−1). Observations revealed the diversified microbiological ecology of the denitrifying bacteria. Citric acid was used mainly by bacteria representing the Trichoccocus genus, which represented above 40% of the sample during the first phase of the process (cycles 1–60). In the second phase (cycles 61–180) the microorganisms the genera that consumed the acetate and formate, as the result of citric acid decomposition were Propionibacterium (5.74%), Agrobacterium (5.23%), Flavobacterium (1.32%), Sphaerotilus (1.35%), Erysipelothrix (1.08%). |
| Databáze: | OpenAIRE |
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