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51316-7346-Development of an Enzyme-Based Approach to Control the Formation of MIC

Picture for Development of an Enzyme-Based Approach to Control the Formation of MIC
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Corrosive biofilm formation on metal surfaces can have serious impacts. Through this proof of concept research project we established and maintained MIC biofilms for testing with various enzyme preparations. After two months of incubation in a bioreactor inoculated with a consortium of MIC microorganisms, the presence of corrosive MIC biofilms were confirmed on steel coupons.

Product Number: 51316-7346-SG
ISBN: 7346 2016 CP
Author: Amanda Harmon
Publication Date: 2016
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$20.00
$20.00

 Corrosive biofilm formation on metal surfaces can have serious impacts on the infrastructure of the natural gas and oil industries. Once initiated, biofilms are extremely difficult to remove even with current mechanical cleaning methods (i.e., pigging) as large sections of a pipeline system are inaccessible. It is also well known that the application of biocides alone does not completely remove the protective slime layer of biofilms. In this study, we hypothesized that the addition of appropriate enzymes or cocktails of enzymes may be able to significantly enhance the effectiveness of biocides and may represent a potential future solution to biofilm prevention and mitigation. The application of enzymes, which are environmentally benign and biodegradable, in the natural gas and oil industry may provide a needed treatment alternative by either eliminating or reducing the widespread use of biocides. Through this proof of concept research project we successfully established and maintained MIC biofilms for subsequent testing with various enzyme preparations. After two months of incubation in a bioreactor inoculated with a consortium of MIC microorganisms, the presence of corrosive MIC biofilms were confirmed on steel coupons. The addition of individual commercial enzyme preparations and mixtures of enzymes were able to reduce the biofilm load. Consistent with this result was the apparent reduction in the numbers of microorganisms associated with the treated biofilms. Together the data suggests that the application of enzymes may prove to be beneficial in the degradation of the MIC biofilm structure.

Key words: downloadable, Microbiologically Influenced Corrosion, MIC, biofilm, enzymes, mitigation

 

 Corrosive biofilm formation on metal surfaces can have serious impacts on the infrastructure of the natural gas and oil industries. Once initiated, biofilms are extremely difficult to remove even with current mechanical cleaning methods (i.e., pigging) as large sections of a pipeline system are inaccessible. It is also well known that the application of biocides alone does not completely remove the protective slime layer of biofilms. In this study, we hypothesized that the addition of appropriate enzymes or cocktails of enzymes may be able to significantly enhance the effectiveness of biocides and may represent a potential future solution to biofilm prevention and mitigation. The application of enzymes, which are environmentally benign and biodegradable, in the natural gas and oil industry may provide a needed treatment alternative by either eliminating or reducing the widespread use of biocides. Through this proof of concept research project we successfully established and maintained MIC biofilms for subsequent testing with various enzyme preparations. After two months of incubation in a bioreactor inoculated with a consortium of MIC microorganisms, the presence of corrosive MIC biofilms were confirmed on steel coupons. The addition of individual commercial enzyme preparations and mixtures of enzymes were able to reduce the biofilm load. Consistent with this result was the apparent reduction in the numbers of microorganisms associated with the treated biofilms. Together the data suggests that the application of enzymes may prove to be beneficial in the degradation of the MIC biofilm structure.

Key words: downloadable, Microbiologically Influenced Corrosion, MIC, biofilm, enzymes, mitigation

 

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