https://scholars.lib.ntu.edu.tw/handle/123456789/408317
Title: | Understanding of aerobic granulation enhanced by starvation in the perspective of quorum sensing | Authors: | Liu X. Sun S. Ma B. Zhang C. Wan C. Lee D.-J. |
Keywords: | Aerobic granulation;Autoinducer-2 (AI-2);Cell adhesiveness;Extracellular polymeric substances (EPS);Microbial community;Starvation | Issue Date: | 2016 | Journal Volume: | 100 | Journal Issue: | 8 | Start page/Pages: | 3747-3755 | Source: | Applied Microbiology and Biotechnology | Abstract: | Three sequencing batch reactors (M1, M2, and M3) were set up to investigate the influence of different lengths of starvation time (3, 5, and 7?h) on aerobic granulation in the perspective of quorum sensing (QS). Autoinducer-2 (AI-2) level was quantified to evaluate the QS ability of aerobic granules. The results indicated that AI-2 level increased steadily during a cycle of sequencing batch reactors, suggesting that starvation was closely related to AI-2 secretion. In the long-term operation, aerobic granules cultivated using a prolonged starvation period had a better integrity and a higher level of cell adhesiveness despite a slower formation speed. With the extension of the starvation period, the total amount of extracellular polymeric substances (EPS) displayed an increasing tendency. EPS with large molecular weight (MW) also reached a higher level using a prolonged starvation period. However, a higher level of AI-2 and cell adhesiveness was observed in M2, which might be related to more stable granules. The results implied that the starvation period could trigger AI-2 secretion and promoted the production of large MW EPS, leading to cell adhesiveness enhancement and granule formation. Therefore, a combination of different starvation periods was proposed in this study in order to improve aerobic granulation. ? 2015, Springer-Verlag Berlin Heidelberg. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/408317 | ISSN: | 01757598 | DOI: | 10.1007/s00253-015-7246-1 |
Appears in Collections: | 化學工程學系 |
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