Dynamics Of Bacterial Streamers Induced Clogging In Microfluidic Devices

Abstract

Using a microfabricated porous media mimic platform, we investigated the clogging dynamics of bacterial biomass that accumulated in the device due to the formation of bacterial streamers. Particularly, we found the existence of a distinct clogging front which advanced via pronounced 'stick-slip' of the viscoelastic bacterial biomass over the solid surface of the micro pillar. Thus, the streamer, the solid surface, and the background fluidic media defined a clear three-phase front influencing these advancing dynamics. Interestingly, we also found that once the clogging became substantial, contrary to a static homogenous saturation state, the clogged mimic exhibited an instability phenomena marked by localized streamer breakage and failure leading to extended water channels throughout the mimic. These findings have implications for design and fabrication of biomedical devices and membrane-type systems such as porous balloon catheters, porous stents and filtration membranes prone to bacteria induced clogging as well as understanding bacterial growth and proliferation in natural porous media such as soil and rocks.

Publication Date

1-1-2016

Publication Title

Lab on a Chip

Volume

16

Issue

21

Number of Pages

4091-4096

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1039/c6lc01055e

Socpus ID

84992337622 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84992337622

This document is currently not available here.

Share

COinS