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

被引：56

作者：

Ding, Yangcheng ^{[1
]}

Feng, Huajun ^{[1
]}

Huang, Wenkun ^{[2
]}

Shen, Dongsheng ^{[1
]}

Wang, Meizhen ^{[1
]}

机构：

[1] Zhejiang Gongshang Univ, Zhejiang Prov Key Lab Solid Waste Treatment & Rec, Hangzhou 310012, Zhejiang, Peoples R China

[2] Chinese Acad Agr Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, Beijing 100193, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2015年 / 196卷

基金：

中国国家自然科学基金;

关键词：

Quorum sensing; Anaerobic granular sludge; Signal molecules; Sustainable regulation; Granulation; EXTRACELLULAR POLYMERIC SUBSTANCES; HOMOSERINE LACTONES; ACTIVATED-SLUDGE; QUORUM; EPS;

D O I：

10.1016/j.biortech.2015.07.066

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

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.

引用

页码：273 / 278

页数：6

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