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Influence of surfaces on sulphidogenic bacteria

Influence of surfaces on sulphidogenic bacteria
Influence of surfaces on sulphidogenic bacteria
Sulphidogenic bacteria in oil reservoirs are of great economic importance in terms of souring, fouling and corrosion. Mixed cultures containing these bacteria were isolated from chalk formations in North Sea oil reservoirs. These were thermophilic cultures, growing optimally at 60°C. Oil formations are porous matrices, providing a very large surface area and ideal conditions for bacterial attachment, survival and growth. This study included assessments of sulphide production rates of thermophilic (t-)sulphidogen consortia with and without additional surfaces. The availability of a surface contributed significantly to the rate and extent of sulphide generation. Surfaces were offered in varying amounts to growing planktonic cultures: significantly more sulphide was produced from cultures in contact with a surface than from identical cultures in the absence of a surface. In another series of experiments, t-sulphidogens were added to chalk rock chips in the presence of nutrients and incubated for several months. This resulted in rapid sulphide generation, the final concentration being related to the initial nutrient concentration. Subsequent nutrient addition resulted in renewed sulphide generation. It is suggested that bacteria in reservoirs can withstand long periods of nutrient deprivation while attached within the porous rock matrix and opportunistically utilise nutrients when they become available.
0892-7014
95-109
Bass, Catherine
7f31da39-003f-4bce-8b3e-59e5b89c0b36
Webb, Jeremy
ec0a5c4e-86cc-4ae9-b390-7298f5d65f8d
Sanders, Peter
68a202d3-a789-4565-9199-3e60c982f8eb
Lappin-Scott, Hilary
b9e7513f-0c5e-4282-8d8c-527688488410
Bass, Catherine
7f31da39-003f-4bce-8b3e-59e5b89c0b36
Webb, Jeremy
ec0a5c4e-86cc-4ae9-b390-7298f5d65f8d
Sanders, Peter
68a202d3-a789-4565-9199-3e60c982f8eb
Lappin-Scott, Hilary
b9e7513f-0c5e-4282-8d8c-527688488410

Bass, Catherine, Webb, Jeremy, Sanders, Peter and Lappin-Scott, Hilary (1996) Influence of surfaces on sulphidogenic bacteria. Biofouling, 10 (1&3), 95-109. (doi:10.1080/08927019609386273).

Record type: Article

Abstract

Sulphidogenic bacteria in oil reservoirs are of great economic importance in terms of souring, fouling and corrosion. Mixed cultures containing these bacteria were isolated from chalk formations in North Sea oil reservoirs. These were thermophilic cultures, growing optimally at 60°C. Oil formations are porous matrices, providing a very large surface area and ideal conditions for bacterial attachment, survival and growth. This study included assessments of sulphide production rates of thermophilic (t-)sulphidogen consortia with and without additional surfaces. The availability of a surface contributed significantly to the rate and extent of sulphide generation. Surfaces were offered in varying amounts to growing planktonic cultures: significantly more sulphide was produced from cultures in contact with a surface than from identical cultures in the absence of a surface. In another series of experiments, t-sulphidogens were added to chalk rock chips in the presence of nutrients and incubated for several months. This resulted in rapid sulphide generation, the final concentration being related to the initial nutrient concentration. Subsequent nutrient addition resulted in renewed sulphide generation. It is suggested that bacteria in reservoirs can withstand long periods of nutrient deprivation while attached within the porous rock matrix and opportunistically utilise nutrients when they become available.

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More information

Published date: 1996

Identifiers

Local EPrints ID: 186853
URI: https://eprints.soton.ac.uk/id/eprint/186853
ISSN: 0892-7014
PURE UUID: b0c56bc2-e75c-45ca-aed9-68ac62465f05
ORCID for Jeremy Webb: ORCID iD orcid.org/0000-0003-2068-8589

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Date deposited: 01 Jun 2011 12:22
Last modified: 05 Nov 2019 01:46

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