Jun 8, 2019

Quorum sensing signaling distribution during the development of full-scale municipal wastewater treatment biofilms

The Science of the Total Environment
Jinfeng WangHongqiang Ren

Abstract

Acylated homoserine lactone (AHL)-mediated quorum sensing (QS) is ecologically important in multi-species systems in laboratory-scale studies; however, little is known about QS in the biofilm formation process in full-scale wastewater treatment plants, which is driven by multiple environmental variables. Here, a model integrated fixed-film-activated sludge system was employed in full-scale municipal wastewater treatment plant to investigate the AHL distribution during the biofilm development process in response to variable environmental factors. The whole biofilm development process can be divided into three phases: initial biofilm attachment process (week 1 to 3), biofilm development and mature phase (week 4 to 6), and biofilm detachment and reformation process (week 7 to 17). N-decanoyl-DL-homoserine lactone (C10-HSL) and N-dodecanoyl-DL-homoserine lactone (C12-HSL) presented high concentrations during the biofilm formation process, which was closely related with the biofilm initial attachment process. The AHL concentration in biofilms was higher than in activated sludge. During the initial attachment process, tryptophan and protein-like substances related to biological substance were strongly positively correlated with all d...Continue Reading

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Mentioned in this Paper

Study
Tryptophan
Regulation of Biological Process
Cell-cell Signaling Involved in Quorum Sensing
Sodium Cation
Nitrogen
N-butanoyl-L-homoserine lactone
Species
Acyl-Homoserine Lactones
Leukoencephalitis, Acute Hemorrhagic

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