ArticleScientific reports2024
Biosurfactant and biopolymer producing microorganisms from West Kazakhstan oilfield.
Article in Scientific reports, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed, 20 citations in OpenAlex.
- Diesel biodegradation by biosurfactant producing Paenibacillus strains.Archives of microbiology · 2026Article
- Genome-mining revealed biosurfactant production capacity and gene co-occurrence patterns in diverse ecosystems.Microbial cell factories · 2026Article
- Biotransformation of Aliphatic and Aromatic Hydrocarbons by Aerobic Bacterial Strains Isolated from Brown Coal.International journal of molecular sciences · 2026Article
- Draft genome sequence ofMicrobiology resource announcements · 2025Article
- Microbial communities in petroleum refinery effluents and their complex functions.Saudi journal of biological sciences · 2024Review
- Exploring the use of microbial enhanced oil recovery in Kazakhstan: a review.Frontiers in microbiology · 2024Review
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Authors and funding
6 authors at 2 institutions in 2 countries.
Funding
Abstract
Microbiological enhanced oil recovery (MEOR) uses indigenous or exogenous microorganisms and nutrients to enhance oil production through synthesis of metabolites reducing oil viscosity and surface tension. In order to find bacteria suitable for MEOR, we studied 26 isolates from wells in the Akingen oilfield in West Kazakhstan. Six of them were selected for further analysis based on their ability to reduce surface tension to less than 40 mN/m, with the A9 isolate exhibiting tension reduction values of 32.76 ± 0.3 mN/m. Based on the morphological features, biochemical activities, and the 16S rRNA gene, the isolates were classified to the Bacillus subtilis group. In the phylogenetic analysis the isolates grouped into two main clusters. Genes encoding the surfactin synthetase subunits were found in A2, A8, A9, A12, PW2, only the PW2 strain had lchAA encoding lichenysin, while sacB encoding levan was noted in A2, A8, A9, and A12. The expression of srfAB, srfAC, and sacB tested with qPCR varied among strains. Nevertheless, whereas temperature moderately affects the expression level, with the highest level recorded at 40 °C, salinity significantly impacts the expression of the genes encoding biosurfactants. B. subtilis strains isolated in the study, especially A9, are promising for microbial-enhanced oil recovery.
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