QQ-PAC core-shell structured quorum quenching beads for potential membrane antifouling properties

Area of Science:

• Environmental Science
• Biotechnology
• Materials Science

Background:

• Membrane bioreactors (MBRs) are susceptible to biological contamination, impacting their efficiency.
• Quorum quenching (QQ) is a recognized strategy to mitigate MBR membrane fouling.
• Developing advanced materials for QQ immobilization is crucial for MBR performance.

Purpose of the Study:

• To design and evaluate novel QQ-PAC core-shell beads for enhanced MBR membrane fouling control.
• To investigate the structural, mechanical, and QQ properties of the prepared beads.
• To assess the combined efficacy of QQ bacteria and PAC in mitigating biological contamination.

Main Methods:

• Preparation of QQ-PAC core-shell beads with QQ bacteria in the core and PAC in the shell.
• Microstructural analysis using Scanning Electron Microscopy (SEM).
• Functional group identification via Fourier Transform Infrared Spectroscopy (FTIR).
• Comparative evaluation of mechanical strength, swelling, penetration, and QQ activity.

Main Results:

• The QQ-PAC core-shell structure demonstrated improved adsorption capacity.
• SEM and FTIR confirmed the bead's microstructure and functional groups.
• The combined QQ bacteria and PAC significantly enhanced QQ effect.
• MBR membrane biological contamination was effectively alleviated.

Conclusions:

• QQ-PAC core-shell beads represent an efficient approach for MBR membrane fouling control.
• The immobilization of QQ bacteria within a PAC shell offers synergistic benefits.
• This technology shows significant potential for improving MBR operational stability and longevity.