期刊
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
卷 100, 期 8, 页码 3747-3755出版社
SPRINGER
DOI: 10.1007/s00253-015-7246-1
关键词
Aerobic granulation; Autoinducer-2 (AI-2); Starvation; Cell adhesiveness; Extracellular polymeric substances (EPS); Microbial community
资金
- National Natural Science Foundation of China [51108093, 51278128, 41301332]
- Shanghai International Science and Technology Cooperation Fund [14230700400]
- Outstanding Talent Plan of Fudan University [JJH1829029]
- Key Laboratory of Reservoir Aquatic Environment, Chinese Academy of Sciences [RAE2014CB05B]
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据