Issue 21, 2016

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.

Graphical abstract: Dynamics of bacterial streamers induced clogging in microfluidic devices

Supplementary files

Article information

Article type
Communication
Submitted
21 Aug 2016
Accepted
19 Sep 2016
First published
19 Sep 2016
This article is Open Access
Creative Commons BY license

Lab Chip, 2016,16, 4091-4096

Dynamics of bacterial streamers induced clogging in microfluidic devices

M. Hassanpourfard, R. Ghosh, T. Thundat and A. Kumar, Lab Chip, 2016, 16, 4091 DOI: 10.1039/C6LC01055E

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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