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Donnish Journal of Microbiology and Biotechnology Research

October 2015 Vol. 2(2), pp. 008-014

Copyright 2015 Donnish Journals




Original Research Paper


Biocidal Effects of Ozone, Sodium Hypochlorite and Formaldehyde, on Sulphate Reducing Bacteria Isolated from Biofilms of Corroded Oil Pipelines in the Niger Delta, Nigeria


Akpan, Godwin U.1* and Mohammed Iliyasu2

1Department of Soil Science and Land Resources Management, University of Uyo, P.M.B. 1017, Uyo, Akwa Ibom State, Nigeria.
2Department of Soil Science, University of Calabar, P.M.B. 1115, Calabar, Nigeria.

Corresponding Author E-mail: godwinuakpan@uniuyo.edu.ng

Accepted 17th June, 2015.



Abstract


The performance of three biocides (ozone, sodium hypochlorite and formaldehyde) on Sulphate reducing bacteria was tested. The Sulphate reducing bacteria were isolated from biofilms of corroded oil pipelines under normal flow condition. The study was aimed at controlling these bacteria using the three biocides at different concentrations (0, 1, 2, 3, 4 and 5 percent) in order to reduce the economic losses normally encountered in the oil and gas industry due to the activities of Sulphate reducing bacteria. The results showed that ozone was effective from 1% concentration by completely eliminating Desulfuromonas acetoxidans, Desulfobulbus propionicus and Desulfosarcina variabilis followed by sodium hypochlorite and then formaldehyde being the least effective. For proper monitoring and control of microbiologically influenced corrosion caused by sulphate reducing bacteria, Ozone and one of the non-oxidizing biocides such as formaldehyde should be used.

Keywords: Biocides, Sulphate Reducing Bacteria, Biofilms, Corroded Oil Pipeline, Economic Losses.

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Cite This Article:

Akpan, Godwin U. and Mohammed Iliyasu. Biocidal Effects of Ozone, Sodium Hypochlorite and Formaldehyde, on Sulphate Reducing Bacteria Isolated from Biofilms of Corroded Oil Pipelines in the Niger Delta, Nigeria. Donnish Journal of Microbiology and Biotechnology Research 2(2) 2015 pp. 008-014.


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