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Roles of ATP-dependent N-acylhomoserine lactones (AHLs) and extracellular polymeric substances (EPSs) in aerobic granulation
► The production of AHLs and EPSs was ATP-dependent. ► Both AHLs and EPSs contributed to aerobic granulation. ► Inhibited production of AHLs and EPSs would cause failure of aerobic granulation. Aerobic granules which form through a cell-to-cell self-immobilization process have been intensively studi...
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Published in: | Chemosphere (Oxford) 2012-08, Vol.88 (9), p.1058-1064 |
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Main Authors: | , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | ► The production of AHLs and EPSs was ATP-dependent. ► Both AHLs and EPSs contributed to aerobic granulation. ► Inhibited production of AHLs and EPSs would cause failure of aerobic granulation.
Aerobic granules which form through a cell-to-cell self-immobilization process have been intensively studied and developed for wastewater biotreatment. However, the microbiological origin of this phenomenon is still largely unknown. This study investigated the possible role of metabolic energy in the development of aerobic granules. Results showed that aerobic granulation was positively related to ATP-dependent N-acylhomoserine lactones (AHLs) and extracellular polymeric substances (EPSs) production. Inhibited ATP synthesis by a chemical uncoupler, 3,3′,4′,5-tetrachlorosalicylanilide, led to significant reduction of AHLs and EPSs production, which in turn prevented aerobic granulation. This study for the first time demonstrated the involvement of ATP-dependent AHLs in aerobic granulation. |
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ISSN: | 0045-6535 1879-1298 |
DOI: | 10.1016/j.chemosphere.2012.04.059 |