ISOLATION AND CHARACTERIZATION OF BACTERIAL ASSOCIATED WITH PIPELINE DEBRIS IN OIL PRODUCING COMMUNITIES IN DELTA STATE
Abstract
Microbiologically influenced corrosion (MIC) in crude oil pipelines is a significant problem in the oil and gas industry, leading to structural degradation, increased maintenance costs, and environmental risks. This study aimed to isolate and characterize various bacteria present in oil pipeline debris, with a particular focus on total heterotrophic bacteria (THB), hydrocarbon-utilizing bacteria (HUB), acid-producing bacteria (APB), and sulphate-reducing bacteria (SRB). The analysis employed standard microbial techniques, including serial dilution, pour plate, and specialized media for bacterial enumeration. Results revealed that THB observed in Sample A and Sample B, were of moderate counts, with Sample A showing a value of 5.1 x104 CFU/g and Sample B slightly higher at 5.3 x 104 CFU/g. HUB count was found to be low in Sample A and Sample B, with Sample A having 5.6 x 101 CFU/g and Sample B slightly higher at 6.6 x 101 CFU/g. APB and SRB levels vary significantly between samples, indicating an elevated risk of corrosion. Identified bacteria included Desulfovibrio spp., Pseudomonas spp., and Acinetobacter spp., known for their roles in hydrocarbon degradation and biofilm formation. These activities may exacerbate corrosion processes leading to pipeline failures. Regular microbial monitoring in oil pipeline is crucial to extending pipeline longevity, reducing environmental impacts and ensuring operational safety.
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