APPLIED RESEARCH ON THE COMPETITIVE GROWTH OF BACTERIA IN BIOLOGICAL CONTROL OF MIC

J Chin Soc Corr Pro

2004, Vol. 24

Issue (3): 159-162 DOI:

Research Report

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APPLIED RESEARCH ON THE COMPETITIVE GROWTH OF BACTERIA IN BIOLOGICAL CONTROL OF MIC

Meifang Wang

武汉华中科技大学化学系

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Abstract A strain of Thiobacillus denitrificans was isolated from soil,which was selected to reduce the corrosion caused by SRB.The optimal pH was determined as 7.0 for the growth of T.denitrificans and the growth curve was measured.The growth environment of T.denitrificans was found to be similar to that of SRB.T.denitrificans and SRB could grow together in mixed medium.A laboratory investigation using scanning probe microscopy and electron probe microanalysis(EPMA)had been undertaken to study the compactness of biofilms,composed of corrosion products in mixed medium.It was observed that T.denitrificans could reduce the corrosion caused by SRB which attributed to that it could consume the corrosive sulfide produced by SRB and limit the sulfide accumulating in biofilms.So the content of sulfide in biofilms decreased and the extracellular polymeric substances of T.denitrificans enhanced the compactness of biofilm.Therefore,the process of charge transfer was baffled,leading to a decrease of the corrosion caused by SRB.

Key words: thiobacillus denitrificans sulfate-reducing bacteria b iofilm

Received: 29 September 2002

ZTFLH:

TG174

Corresponding Authors: Meifang Wang

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Meifang Wang. APPLIED RESEARCH ON THE COMPETITIVE GROWTH OF BACTERIA IN BIOLOGICAL CONTROL OF MIC. J Chin Soc Corr Pro, 2004, 24(3): 159-162 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2004/V24/I3/159

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