Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/148
Title: Biologically Active Solid Deposits in Biocide treated Oil and Gas pipelines from a Nigerian Onshore Oil Production Facility
Authors: Amund, OkoroO
Samuel, Chuma
Keywords: Corrosion
Solid Deposits
Pipelines
Biologically Active
Issue Date: 2013
Citation: International Journal of Ecology and Environmental Sciences 39 (1), 51-58.
Abstract: Pipelines transporting crude oil, produced water and gas from an onshore oil producing facility in Nigeria are subject to frequent corrosion failures despite treatment programs with chlorine (0.5mg L-1) and sodium azide (0.2 mg L-1). Solid deposit samples from 6 corroded pipelines were analyzed chemically and biologically to determine whether the corrosion episodes were as a result of microbial activity. Microbiological analysis showed relatively high concentrations of microorganisms associated with corrosion such as SRBs (103-105 cell g-1) and APBs (103-107 cells g-1) while chemical analysis showed evidence of corrosion products such as iron II, calcium, sulfide, carbonate and bicarbonate. Chemical analysis also revealed that environmental conditions such as availability of nutrients, pH, moisture and redox potential were favorable for the growth and proliferation of these microorganisms. All the pipeline samples that were investigated recorded remarkable corrosion rates that ranged from 0.065-0.30 mm yr-1 but the rates were higher in chloride treated pipelines. Our investigation revealed that the solid deposit samples were biologically active and pipeline corrosion was as a result of microbial activity. Thus the prevalence of bio-corrosion is likely to be higher in cases where routine pipeline cleaning and checks are not strictly adhered to despite regular biocide treatment programs
Description: Kindly contact Dr Yetunde Zaid (yzaid@unilag.edu.ng) or Dr. Christopher Okiki (cokiki@unilag.edu.ng) to access the full text of this article.
URI: http://www.nieindia.org/Journal/index.php/ijees/article/view/103
http://hdl.handle.net/123456789/148
Appears in Collections:Staff Publications

Files in This Item:
File Description SizeFormat 
Abstact.docAbstract12 kBMicrosoft WordView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.