Related Experiment Video
Updated: Jan 27, 2026

Extraction of Structural Extracellular Polymeric Substances from Aerobic Granular Sludge
Published on: September 26, 2016
Synergistic interplay between quorum sensing and direct interspecies electron transfer enhances anaerobic granular
Longyi Lv1, Peng Hao1, Shiyang Zhang1
1Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, PR China.
Abstract:
The stability of anaerobic granular sludge (AnGS) is frequently compromised by the biotoxicity of recalcitrant organic compounds. The present study employed exogenous signalling molecules (AHLs) and nanoscale Fe3O4 (Fe3O4NP) particles to modulate quorum sensing (QS) and direct interspecies electron transfer (DIET). The findings of the study demonstrated that this combined strategy enhanced COD removal by 22.4% and increased methane yield by 54.4%. The results of this study demonstrate that AHLs and Fe3O4NPs induce granular structural remodelling, promote secretion of hydrophobic extracellular polymers, and enrich methanogenic and mutualistic microbial communities. QS and DIET synergistically upregulated genes such as pilA/B and fpo, enhancing c-Cyts and conductive pili assembly to establish efficient electron transfer pathways. Concurrently, they stimulated the synthesis of hydrophobic amino acids, thereby strengthening the stability of biofilms. This study constitutes the inaugural demonstration of synergistic QS and DIET regulation, thereby establishing a theoretical framework for enhancing AnGS performance in the treatment of refractory organic wastewater.
More Related Videos
15:19Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor
Published on: October 15, 2015
12:22Mindfulness in Motion MIM: An Onsite Mindfulness Based Intervention MBI for Chronically High Stress Work Environments to Increase Resiliency and Work Engagement
Published on: July 1, 2015
Related Concept Videos
Gene Regulation in Microbial Communities: Quorum Sensing
Ionic Bonding and Electron Transfer
Responses to Salt Stress
¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)
Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)
The Sense of Self: Reflected Self-Appraisal and Social Comparison