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Review
. 2021 Jun 2;37(7):111.
doi: 10.1007/s11274-021-03080-9.

A review on anaerobic microorganisms isolated from oil reservoirs

Amarjit Rajbongshi  1 , Subrata Borgohain Gogoi  2
Affiliations
Review

A review on anaerobic microorganisms isolated from oil reservoirs

Amarjit Rajbongshi et al. World J Microbiol Biotechnol. .

Abstract

The Role of microorganisms in the petroleum industry is wide-ranging. To understand the role of microorganisms in hydrocarbon transformation, identification of such microorganisms is vital, especially the ones capable of in situ degradation. Microorganisms play a pivotal role in the degradation of hydrocarbons and remediation of heavy metals. Anaerobic microorganisms such as Sulphate Reducing Bacteria (SRB), responsible for the production of hydrogen sulphide (H2S) within the reservoir, reduces the oil quality by causing reservoir souring and reduction in oil viscosity. This paper reviews the diversity of SRB, methanogens, Nitrogen Reducing Bacteria (NRB), and fermentative bacteria present in oil reservoirs. It also reviews the extensive diversity of these microorganisms, their applications in petroleum industries, characteristics and adaptability to survive in different conditions, the potential to alter the petroleum hydrocarbons properties, the propensity to petroleum hydrocarbon degradation, and remediation of metals.

Keywords: Anaerobic; Enhanced oil recovery; Hydrocarbon degradation; Sulphate-reducing bacteria.

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