Identification of the traditional and non-traditional sulfate-reducing bacteria associated with corroded ship hull

Zarasvand, Kiana Alasvand and Ravishankar Rai, V. (2016) Identification of the traditional and non-traditional sulfate-reducing bacteria associated with corroded ship hull. 3 Biotech, 6. p. 197. ISSN 2190-5738

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Abstract

Pitting corrosion due to microbial activity is the most severe type of corrosion that occurs in ship hull. Since biogenic sulfide produced by sulfate-reducing bacteria (SRB) is involved in the acceleration of pitting corrosion of marine vessels, so it is important to collect information about SRB community involved in maritime vessel failure. We investigated the SRB community on corroded hull portion of the ship. With the use of common cultural method and 16S rDNA sequencing, ten bacteria with sulfate reduction ability were isolated and identified. They belonged to both traditional (Desulfovibrio, Desulfotomaculum) and non-traditional (Citrobacter) sulfate-reducing bacteria. All the isolates were able to produce a high amount of sulfide. However, only traditional isolates were showing the amplification for the SRB-specific gene, dsrAB. Further studies on corrosion potential of these two groups of bacteria showed that in spite of high sulfide and biofilm production by non-traditional SRB, they are less aggressive towards the mild steel compare to the traditional group.

Item Type:	Article
Subjects:	B Life Science > Microbiology
Divisions:	Department of > Microbiology
Depositing User:	Manjula P Library Assistant
Date Deposited:	19 Jun 2019 05:12
Last Modified:	19 Jun 2019 05:12
URI:	http://eprints.uni-mysore.ac.in/id/eprint/3377

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