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Proceedings Paper

Fibre-optic sensors for the estimation of biofilm thickness on metals
Author(s): A. Balaji Ganesh; T. K. Radhakrishnan; G. Gobi; D. Sastikumar
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Paper Abstract

This paper presents an optical approach to estimate the thickness of biofilms on metals in natural aqueous environment. An in-situ fibre optic sensor is held above the sample surface, to offer real time information continuously by measuring the spatially resolved profiles of scattered light in biofilms. The optical results correlate well with the biofilm thickness which is measured using a microscope and a microcapillary with a protruding thin, long flexible wire from the top of the microcapillary. The biofilm thickness is less than 120 &mgr;m on test material after 20 days. Microscopic image analysis also provides the evidence to confirm micro colony formation by rod and cocci bacterial species. The species Klebsiella are found to be dominant on carbon steel. It is observed that measured optical intensity is proportional to the concentration of organisms.

Paper Details

Date Published: 2 July 2007
PDF: 4 pages
Proc. SPIE 6619, Third European Workshop on Optical Fibre Sensors, 66191E (2 July 2007); doi: 10.1117/12.738423
Show Author Affiliations
A. Balaji Ganesh, National Institute of Technology,Trichirappalli (India)
T. K. Radhakrishnan, National Institute of Technology,Trichirappalli (India)
G. Gobi, National Institute of Technology,Trichirappalli (India)
D. Sastikumar, National Institute of Technology,Trichirappalli (India)

Published in SPIE Proceedings Vol. 6619:
Third European Workshop on Optical Fibre Sensors

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