Properties and characterization of biosurfactant in crude oil biodegradation by bacterium Bacillus methylotrophicus USTBa

Biosurfactants: Promising Molecules for Petroleum Biotechnology Advances

“…Such transportation particularly for heavy or extra-heavy crudes often represents operational challenges limiting its economic viability. High degree of viscosity due to high paraffins and asphaltenes content in heavy crude oil can decrease its flow which often leads to sludge deposition on the inner walls leading to pressure reductions that ultimately can lead to pipeline plugging problems (Perfumo et al, 2010; Cerón-Camacho et al, 2013). Asphaltenes in particular precipitate in metal pipelines under acidic conditions and in the presence of ferric ions forming asphaltene mud which would deposit in the pipeline obstructing the flow of crude oil.…”

“…In countries such as China, Canada, Venezuela, Mexico, and the USA; the heavy crude oils represent approximately half of recoverable oil resources. The development of efficient uses for this resource therefore is fast becoming an important technology (Cerón-Camacho et al, 2013). …”

Biosurfactant-enhanced bioremediation of aged polycyclic aromatic hydrocarbons (PAHs) in creosote contaminated soil

“…Single colonies from serially diluted samples from the enrichment cultures were tested for biosurfactant production using DropCollapse method (Chandankere et al, 2014). The 'drop collapse' assay relies on the destabilization of liquid oil droplets by surfactants.…”

Production and applications of lipopeptide biosurfactant for bioremediation and oil recovery by Bacillus subtilis CN2

“…There are many reports describing the effect of exogenously added microbial biosurfactants in enhancing the bioremediation of crude oilpolluted soils by indigenous microbes [21,22,8] The aim of this study is to isolate potent hydrocarbon-degrading and biosurfactant-producing bacterial strain and to assess the abilities of the biosurfactant produced in assisting the biodegradation of representative PAHs in motor oil and assess its potential application for motor oil recovery from spiked sand. For the bioremediation purpose, potential hydrocarbon degrading microbial consortia isolated from creosote contaminated soil using coal tar creosote as a source of carbon and energy was used.…”

“…Thavasi et al[21] observed maximum crude oil degradation and biosurfactant production with Pseudomonas aeruginosa (89%, with 0.1% biosurfactant).Similarstudies ofbiosurfactant enhanced degradation have been reported bymany authors. Chandankere et al[8] reported that an effective biosurfactant-producer and hydrocarbon degrading bacterial strain, Bacillus methylotrophicusUSTBadegraded 92% of crude oil in 2 weeks' time and produced biosurfactant during the course of hydrocarbon degradation that had the ability to decrease the surface tension of water from 72 to 28 mN/m. A biosurfactant from L. delbrueckiicultured with peanut oil cake as the carbon source was tested in biodegradation experimentswith crude oil.…”