Chelators enhanced biocide inhibition of planktonic sulfate-reducing bacterial growth

  • J. Wen
  • K. Zhao
  • T. GuEmail author
  • I. Raad
Original Paper


Biocides are currently the primary mitigation method to control sulfate-reducing bacteria (SRB) in biofouling, reservoir souring and microbiologically influenced corrosion. Increasingly restrictive environmental regulations and safety concerns on biocide uses demand more efficient dosing of biocides. Chelators have been known to enhance antibiotics because of their properties such as increasing the permeability of the outer cell membrane of Gram-negative bacteria. Two readily biodegradable chelators, ethylenediaminedisuccinate (EDDS) and N-(2-hydroxyethyl)iminodiacetic acid (HEIDA) disodium salts that are touted as potential replacements of ethylenediaminetetraacetic acid (EDTA), were evaluated as potential biocide enhancers for glutaraldehyde and tetrakis hydroxymethyl phosphonium sulfate (THPS) in their inhibition of planktonic SRB growth. Desulfovibrio vulgaris ATCC 7757 and Desulfovibrio desulfuricans ATCC 14563 were grown in modified ATCC 1249 medium and in enriched artificial seawater, respectively. Laboratory tests in 100 ml anaerobic vials showed that EDDS or HEIDA alone did not inhibit SRB growth. However, when EDDS or HEIDA was combined with glutaraldehyde or THPS, each of them enhanced the biocide inhibition of planktonic SRB growth.


Desulfovibrio desulfuricans Chelators EDDS HEIDA Biocide Glutaraldehyde THPS 



This work was supported by a grant from Enhanced Corrosion Prevention, LLC, and a seed grant from the M. D. Anderson Cancer Center.


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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  1. 1.Department of Chemical and Biomolecular EngineeringOhio UniversityAthensUSA
  2. 2.Department of Infectious Diseases, Infection Control, and Employee HealthThe University of Texas M. D. Anderson Cancer CenterHoustonUSA

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