Effect of gradual-increasing aeration mode in an aerobic tank on nutrients' removal and functional microbial communities
Different aeration rates and modes in an aerobic tank of an anaerobic/anoxic/aerobic (A2O) process were investigated to reveal their influence on nitrogen and phosphorus removal efficiency. Meanwhile, Illumina high-throughput sequencing of partial 16S rRNA gene of bacteria was conducted to monitor t...
| Veröffentlicht in: | Environmental technology. - 1998. - 38(2017), 20 vom: 03. Okt., Seite 2621-2628 |
|---|---|
| 1. Verfasser: | |
| Weitere Verfasser: | , , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2017
|
| Zugriff auf das übergeordnete Werk: | Environmental technology |
| Schlagworte: | Journal Article Gradual-increasing aeration high-throughput sequencing microbial community nitrogen and phosphorus removal wastewater treatment RNA, Ribosomal, 16S Sewage Phosphorus 27YLU75U4W mehr... |
| Zusammenfassung: | Different aeration rates and modes in an aerobic tank of an anaerobic/anoxic/aerobic (A2O) process were investigated to reveal their influence on nitrogen and phosphorus removal efficiency. Meanwhile, Illumina high-throughput sequencing of partial 16S rRNA gene of bacteria was conducted to monitor the abundance and composition of microbial communities. The results showed that higher aeration rate led to better nutrients' removal efficiency. The gradual-increasing aeration mode along the wastewater stream enhanced the contaminants' removal and the system achieved chemical oxygen demand, [Formula: see text]-N, total nitrogen (TN) removal rates of 72%, 96% and 51%, respectively. However, the gradual-decreasing or uniform aeration modes resulted in inefficient removal of TN, especially the ammonia due to low DO in the end parts of A2O. Microbial community analysis indicated that denitrifying phosphorus-accumulating bacteria Acinetobacter spp. were the most dominant groups under the gradual-increasing aeration mode in all tanks of the A2O bioreactor. Moreover, the members of genera Clostridium, Thauera and Dechloromonas also largely existed in the system. The gradual-increasing aeration mode and cooperation of different groups of bacteria made the system stable and high-performance |
|---|---|
| Beschreibung: | Date Completed 05.01.2018 Date Revised 02.12.2018 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1479-487X |
| DOI: | 10.1080/09593330.2016.1272636 |