Please use this identifier to cite or link to this item:
http://acervodigital.unesp.br/handle/11449/116305
- Title:
- Assessing Bacillus subtilis biosurfactant effects on the biodegradation of petroleum products
- Universidade Estadual Paulista (UNESP)
- 0167-6369
- Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
- Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
- Fundação para o Desenvolvimento da UNESP (FUNDUNESP)
- PRH-ANP/MCT (Programa de Formacao de Recursos Humanos em Geologia do Petroleo e Ciencias Ambientais Aplicadas ao Setor de Petroleo e Gas)
- UNESP (Universidade Estadual Paulista "Julio de Mesquita Filho")
- 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 CO2 production 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 CO2 output. Higher emulsification and an enhanced CO2 production dataset on assays containing biosurfactants was observed, especially in crude oil and kerosene.
- 1-Jan-2015
- Environmental Monitoring And Assessment. Dordrecht: Springer, v. 187, n. 1, 17 p., 2015.
- 17
- Springer
- Bioremediation
- Respirometry
- Kinetics
- Hydrocarbon
- http://dx.doi.org/10.1007/s10661-014-4116-8
- Acesso restrito
- outro
- http://repositorio.unesp.br/handle/11449/116305
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