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- Title
Denitrifying phosphorus removal for simultaneous nitrogen and phosphorus removal from wastewater with low C/N ratios and microbial community structure analysis.
- Authors
Lv, Xiao-mei; Li, Ji; Sun, Fei-yun; Li, Chao-lin; Shao, Ming-fei; Dong, Wen-yi
- Abstract
Simultaneous nitrogen and phosphorus removal by denitrifying phosphorus accumulating organisms (DPAO) from domestic wastewater with a low C/N was studied in a pilot-scale A2N/BAF process. Through long-term investigation for more than 820 d, it was evidenced that the A2N/BAF performed well on COD,-N and TP removals with efficiencies averaged at 84, 97 and 90%, respectively. Phosphorus removal in the system was mainly attributed to the function of DPAO through the analysis of phosphorus uptake and nitrate consumption, and the relative phosphorus uptake activity of DPAO/PAO was approximately 70.3%. Moreover, the microbial diversity and dominant bacterial community in the A2N/BAF was investigated with high-throughput sequencing. It was revealed that the A2N/BAF sludge had comparatively less diversity than seed sludge and shared several common dominant taxonomic bacteria with seed sludge, while long-term operation also shifted the microbial community. The A2N/BAF system was feasible for the treatment of low C/N wastewaters without any additional carbon source, which gave a new insight for efficient removal of organic and nutrients simultaneously.
- Subjects
DENITRIFICATION; REFRIGERANTS; SEWAGE &; the environment; WATER purification; PHOSPHORUS &; the environment
- Publication
Desalination & Water Treatment, 2016, Vol 57, Issue 4, p1890
- ISSN
1944-3994
- Publication type
Article
- DOI
10.1080/19443994.2014.979235