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Fast start-up, performance and microbial community in a pilot-scale anammox reactor seeded with exotic mature granules |
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| Authors: | Ni Shou-Qing Gao Bao-Yu Wang Chih-Cheng Lin Jih-Gaw Sung Shihwu |
| Affiliation: | a School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China b School of Environmental Science and Engineering, Shandong University, Jinan 250100, China c Institute of Environmental Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan d Department of Civil, Construction and Environmental Engineering, Iowa State University, Ames 50011, IA, USA |
| Abstract: | The possibility to introduce the exotic anammox sludge to seed the pilot-scale anammox granular reactor and its fast start-up for treating high nitrogen concentration wastewater were evaluated in this study. The reactor was started up successfully in two weeks; in addition, high nitrogen removal was achieved for a long period. Stoichiometry molar ratios of nitrite conversion and nitrate production to ammonium conversion were calculated to be 1.26 ± 0.02:1 and 0.26 ± 0.01:1, respectively. The Stover-Kincannon model which was first applied in granular anammox process indicated that the granular anammox reactor possessed high nitrogen removal potential of 27.8 kg/m3/d. The anammox granules in the reactor were characterized via microscope observation and fluorescence in situ hybridization technique. Moreover, the microbial community of the granules was quantified to be composed of 91.4-92.4% anammox bacteria by real-time polymerase chain reaction. This pilot study can elucidate further information for industrial granular anammox application. |
| Keywords: | Anammox granule Exotic sludge Kinetics Molecular technique Start-up |
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