Effect of the gradual increase of salt on stability and microbial diversity of granular sludge and ammonia removal
| Autor: | Sérgio Oliveira de Paula, Cynthia Canêdo da Silva, Claudio Mudadu Silva, Roberto Sousa Dias, Helena Santiago Lima, João Paulo Bassin, Lívia Carneiro Fidélis Silva, Karen Braathen Carvalho, Larissa Quartaroli, R. S. L. Souza |
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| Rok vydání: | 2019 |
| Předmět: |
Environmental Engineering
Denitrification 0208 environmental biotechnology Population 02 engineering and technology 010501 environmental sciences Management Monitoring Policy and Law Sodium Chloride 01 natural sciences Bioreactors Ammonia Aerobic denitrification RNA Ribosomal 16S education Waste Management and Disposal Effluent 0105 earth and related environmental sciences education.field_of_study Sewage Chemistry Granule (cell biology) General Medicine Nitrification 020801 environmental engineering Microbial population biology Anammox Environmental chemistry |
| Zdroj: | Journal of environmental management. 248 |
| ISSN: | 1095-8630 |
| Popis: | Two sequential batch reactors were operated, aiming at forming aerobic granular sludge and studying the effects of the gradual increase of the NaCl concentration on the granule. structure and microbial diversity, and on the efficiency of ammonia removal. The reactors were fed with ammonia-enriched synthetic effluent and 5 g L−1 of NaCl per week were applied. A decrease in the size of the granules was observed until they were completely disintegrated as the salt concentration increased up to 10 g L−1. However, the ammonia removal efficiency remained high in all the salinities applied. By sequencing the 16S rRNA amplicon gene, the microbial community structure allowed the verification of the presence of several genera affiliated with the bacteria that perform both heterotrophic nitrification and aerobic denitrification, besides those involved in the conventional nitrification and denitrification and the ANAMMOX process. Salinity affected the microbial population related to the formation and stability of the granules. |
| Databáze: | OpenAIRE |
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