Assessing Bacillus subtilis biosurfactant effects on the biodegradation of petroleum products

Microbial pollutant removal capabilities can be determined and exploited to accomplish bioremediation of hydrocarbon-polluted environments. Thus, increasing knowledge on environmental behavior of different petroleum products can lead to better bioremediation strategies. Biodegradation can be enhance...

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Bibliographic Details
Published in:Environmental monitoring and assessment Vol. 187; no. 1; pp. 4116 - 17
Main Authors: Montagnolli, Renato Nallin, Lopes, Paulo Renato Matos, Bidoia, Ederio Dino
Format: Journal Article
Language:English
Published: Cham Springer-Verlag 01.01.2015
Springer International Publishing
Springer Nature B.V
Subjects:
Assaying
Atmospheric Protection/Air Quality Control/Air Pollution
Bacillus subtilis
Bacillus subtilis - physiology
Biodegradation
Biodegradation, Environmental
Bioremediation
biosurfactants
Carbon dioxide
Chemical spills
Crude oil
data collection
Earth and Environmental Science
Ecology
Ecotoxicology
emulsifying
Enhanced oil recovery
Environment
Environmental behavior
Environmental impact
Environmental Management
Environmental Monitoring
Hydrocarbons
Kerosene
Mathematical models
metabolism
Microorganisms
Monitoring/Environmental Analysis
oils
petroleum
Petroleum - metabolism
Petroleum hydrocarbons
Petroleum products
physiology
Pollutant removal
Pollutants
prediction
Surface tension
Surface-Active Agents
Surface-Active Agents - metabolism
Surfactants
wastewater
Bioremediation
Kinetics
Hydrocarbon
Respirometry
ISSN:0167-6369, 1573-2959, 1573-2959
Online Access:Get full text
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Summary:Microbial pollutant removal capabilities can be determined and exploited to accomplish bioremediation of hydrocarbon-polluted environments. Thus, increasing knowledge on environmental behavior of different petroleum products can lead to better bioremediation strategies. Biodegradation can be enhanced by adding biosurfactants to hydrocarbon-degrading microorganism consortia. This work aimed to improve petroleum products biodegradation by using a biosurfactant produced by Bacillus subtilis. The produced biosurfactant was added to biodegradation assays containing crude oil, diesel, and kerosene. Biodegradation was monitored by a respirometric technique capable of evaluating CO₂production in an aerobic simulated wastewater environment. The biosurfactant yielded optimal surface tension reduction (30.9 mN m⁻¹) and emulsification results (46.90 % with kerosene). Biodegradation successfully occurred and different profiles were observed for each substance. Precise mathematical modeling of biosurfactant effects on petroleum degradation profile was designed, hence allowing long-term kinetics prediction. Assays containing biosurfactant yielded a higher overall CO₂output. Higher emulsification and an enhanced CO₂production dataset on assays containing biosurfactants was observed, especially in crude oil and kerosene.
Bibliography:http://dx.doi.org/10.1007/s10661-014-4116-8
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ISSN:0167-6369
1573-2959
1573-2959
DOI:10.1007/s10661-014-4116-8