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- Title
Enhanced Biocide Mitigation of Field Biofilm Consortia by a Mixture of D-Amino Acids.
- Authors
Yingchao Li; Ru Jia; Al-Mahamedh, Hussain H.; Dake Xu; Tingyue Gu; Coenye, Tom; Silva, Osmar Nascimento; Mandal, Amit Kumar
- Abstract
Microbiologically influenced corrosion (MIC) is a major problem in the oil and gas industry as well as in many other industries. Current treatment methods rely mostly on pigging and biocide dosing. Biocide resistance is a growing concern. Thus, it is desirable to use biocide enhancers to improve the efficacy of existing biocides. D-Amino acids are naturally occurring. Our previous work demonstrated that some D-amino acids are biocide enhancers. Under a biocide stress of 50 ppm (w/w) hydroxymethyl phosphonium sulfate (THPS) biocide, 1 ppm D-tyrosine and 100 ppm D-methionine used separately successfully mitigated the Desulfovibrio vulgaris biofilm on carbon steel coupons. The data reported in this work revealed that 50 ppm of an equimolar mixture of D-methionine, D-tyrosine, D-leucine, and D-tryptophan greatly enhanced 50 ppm THPS biocide treatment of two recalcitrant biofilm consortia containing sulfate reducing bacteria (SRB), nitrate reducing bacteria (NRB), and fermentative bacteria, etc., from oilfield operations. The data also indicated that individual D-amino acids were inadequate for the biofilm consortia.
- Subjects
BIOCIDES; MICROBIOLOGICALLY influenced corrosion; AMINO acids
- Publication
Frontiers in Microbiology, 2016, p1
- ISSN
1664-302X
- Publication type
Article
- DOI
10.3389/fmicb.2016.00896