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Exploring the regulation mechanism of signaling molecules on algal-bacterial granular sludge through different N -acyl-homoserine lactones

Chinese Chemical Letters, ISSN: 1001-8417, Page: 110515
2024
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Article Description

As a recently emerging wastewater treatment technology, Algal-bacterial granular sludge (ABGS) process shows significant advantages. However, current research on the ABGS system is a lack of a clear and complete understanding of the potential mechanism of signal molecules on the growth of ABGS. This study comprehensively explores the variations in the ABGS under different N-acyl-homoserine lactone (AHL)conditions by constructing three sequencing batch reactor (SBR) systems. The results indicate that N-hexanoyl-L-homoserine lactone (C6-HSL) accelerates the granulation process in the early stages by promoting the loosely bound extracellular polymeric substances (LB-EPS) secretion and filamentous bacteria growth, thereby shortening required time for initial granule formation. On the other hand, N-(3-oxodecanoyl)-L-homoserine lactone (3-oxo-C12-HSL) expedites the granulation process by promoting the tightly bound extracellular polymeric substances (TB-EPS) and aromatic protein secretion, benefiting structural stability and nitrogen and phosphorus removal efficiency of mature ABGS.

Bibliographic Details

Xibei Tan; Rongrong Wang; Naif Abdullah Al-Dhabi; Bin Wang; Rongfan Chen; Qian Zhang; Dao Zhou; Wangwang Tang; Hongyu Wang

Elsevier BV

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