Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7081714 | Bioresource Technology | 2013 | 6 Pages |
Abstract
This study applied a novel strategy to rapid startup of partial nitrification in continuous-flow reactor using aerobic granules. Mature aerobic granules were first cultivated in a sequencing batch reactor at high chemical oxygen demand in 16 days. The strains including the Pseudoxanthomonas mexicana strain were enriched in cultivated granules to enhance their structural stability. Then the cultivated granules were incubated in a continuous-flow reactor with influent chemical oxygen deamnad being stepped decreased from 1500 ± 100 (0-19 days) to 750 ± 50 (20-30 days), and then to 350 ± 50 mg lâ1 (31-50 days); while in the final stage 350 mg lâ1 bicarbonate was also supplied. Using this strategy the ammonia-oxidizing bacterium, Nitrosomonas europaea, was enriched in the incubated granules to achieve partial nitrification efficiency of 85-90% since 36 days and onwards. The partial nitrification granules were successfully harvested after 52 days, a period much shorter than those reported in literature.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Process Chemistry and Technology
Authors
Chunli Wan, Supu Sun, Duu-Jong Lee, Xiang Liu, Li Wang, Xue Yang, Xiangliang Pan,