Journal
BIORESOURCE TECHNOLOGY
Volume 100, Issue 9, Pages 2501-2506Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2008.12.011
Keywords
Anammox; Start-up; MBR; Microbial community succession
Funding
- National Natural Science Foundation of China [50578024]
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A lab-scale membrane bioreactor (MBR) was used to start-up the anaerobic ammonium oxidation (Anammox) process from the conventional activated sludge for 2 months. Results indicated the MBR could be a novel and suitable system for start-up of the Anammox process. The Anammox activity appeared after 16 days operation, and the average removal efficiencies of ammonia and nitrite were both over 90% in the end. A final specific Anammox activity of 0.35 g (NH4+-N + NO2--N) (gVSS * d)(-1) was obtained. Fluorescence in situ hybridization (FISH) analysis confirmed the existence of Anammox bacteria and aerobic ammonia oxidizing bacteria. On the basis of results on MBR performance and FISH analysis, it was proposed that the start-up process was essentially a microbial community succession under man-made disturbance, and a climax community with Anammox bacteria as the dominant population was finally established. (C) 2008 Elsevier Ltd. All rights reserved.
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