A sustainable method for effective regulation of anaerobic granular sludge: Artificially increasing the concentration of signal molecules by cultivating a secreting strain

文献类型: 外文期刊

第一作者: Feng, Huajun

作者: Feng, Huajun;Shen, Dongsheng;Wang, Meizhen;Huang, Wenkun

作者机构:

关键词: Quorum sensing;Anaerobic granular sludge;Signal molecules;Sustainable regulation;Granulation

期刊名称:BIORESOURCE TECHNOLOGY ( 影响因子:9.642; 五年影响因子:9.237 )

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收录情况: SCI

摘要: This study introduces sustainable quorum sensing (QS) granulation for anaerobic granular sludge (AnGS) and investigates the efficiency of three types of signal molecules on regulating AnGS granulation. The signal molecules of a secreting strain cultured in a QS regulating reactor increased their concentrations in an expanded granular sludge bed reactor throughout the granulating process. Increasing content of autoinducer-2 (AI-2) strengthened interspecific QS communication and gave a best performance with larger granular diameters, higher extracellular polymeric substance (EPS) production and relative hydrophobicity (RH). N-butyryl-homoserine lactone (C4-HSL) QS regulation was also favorable for granular growth, but its regulation was less than that of AI-2-QS. The AnGS granulated under these two types of QS regulations guided more filamentous bacteria to take part in granulation. Under diffusible signal factor (DSF)-QS regulation, the sludge had a lower granular level with a smaller granule diameter, lower EPS production (RH) when compared that of control medium. (C) 2015 Elsevier Ltd. All rights reserved.

分类号: Q

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