Abstract
A slightly curved rod strictly anaerobic, thermophilic bacterium, was isolated from Dagang oil field, China. Its fundamental physiology and corrosion characteristic were analysed. The strain BF4 was Gram-positive. The growth occurred at 45-78°C (optimum was 60°C) and pH 4.5-9.5 (optimum was 7). Substrates could be used involving D-glucose, fructose, sucrose, raffinose, mannose, lactose, lactate, and cellobiose. The 16S rRNA gene sequence analysis indicated that the isolate was affiliated to Caloramator (99% similarity to Caloramator australicus RC3T). In the presence of lactate, iron (III) and sulfate were reduced. When the strain was cultivated in modified Baar’s medium, black precipitation was found. Weight loss method, electrochemical and surface analysis showed the corrosion behavior of the strain. In the presence of the isolate, the corrosion rate was higher compared to the abiotic control. The results of physiological characteristics and bio-corrosion implicated that the strain BF4 is a special SRB. It might play an important role in the corrosion of equipments of the Dagang oil field. Key words: Bio-corrosion behavior, thermophilic bacterium, sulfate reduce, hydrogen sulfide.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
