Citation: Xibei Tan, Rongrong Wang, Naif Abdullah Al-Dhabi, Bin Wang, Rongfan Chen, Qian Zhang, Dao Zhou, Wangwang Tang, Hongyu Wang. Exploring the regulation mechanism of signaling molecules on algal-bacterial granular sludge through different N-acyl-homoserine lactones[J]. Chinese Chemical Letters, ;2025, 36(7): 110515. doi: 10.1016/j.cclet.2024.110515 shu

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

a.
School of Civil Engineering & Architecture, Wuhan University of Technology, Wuhan 430070, China
b.
School of Civil Engineering, Nanyang Institute of Technology, Nanyang 473004, China
c.
School of Civil Engineering, Wuhan University, Wuhan 430072, China
d.
Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
e.
College of Environmental Science and Engineering, Hunan University, Changsha 410082, China

Corresponding author: Qian Zhang, qianzhang@whut.edu.cn Hongyu Wang, hywang96@126.com
Received Date: 17 May 2024
Revised Date: 27 September 2024
Accepted Date: 28 September 2024
Available Online: 4 October 2024

Figures(6)

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.
- Algal-bacterial granular sludge (ABGS),
- Signal molecule,
- N-Acyl-homoserine lactones (AHLs),
- Rapid granulation,
- Nitrogen transformation
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1.
沈阳化工大学材料科学与工程学院沈阳 110142