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Stabilization Mechanism of Low Temperature Aerobic Granular Sludge Formation and Herd Sensing Effect

Xuanduo Ning, Ziyang Dong, Jiasuo Zhao, Yutong Zou, Zhijian Li

Abstract


The formation of aerobic granular sludge under low-temperature conditions faces the challenges of slowed microbial growth rate
and reduced metabolic activity. Based on this, the present study, by deeply exploring the mechanism of group sensing effect in the process of
sludge granulation, found that signaling molecules such as N-acyl homoserine lactones (AHLs) could significantly promote the information
exchange among microorganisms, and then regulate their physiological behaviors and metabolic pathways. By monitoring the changes of extracellular polymers (EPS), the evolution of microbial population structure, as well as the sludge settling performance and removal efficiency
during sludge granulation, the key role of group sensing effect in the stabilization mechanism of low-temperature aerobic granular sludge formation was revealed.

Keywords


Low-temperature aerobic granular sludge; Stabilization mechanism; Group sensing effect

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References


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DOI: http://dx.doi.org/10.70711/frim.v3i12.7910

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