Assessing Bacillus subtilis biosurfactant effects on the biodegradation of petroleum products


Autoria(s): Montagnolli, Renato Nallin; Matos Lopes, Paulo Renato; Bidoia, Ederio Dino
Contribuinte(s)

Universidade Estadual Paulista (UNESP)

Data(s)

18/03/2015

18/03/2015

01/01/2015

Resumo

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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.

Formato

17

Identificador

http://dx.doi.org/10.1007/s10661-014-4116-8

Environmental Monitoring And Assessment. Dordrecht: Springer, v. 187, n. 1, 17 p., 2015.

0167-6369

http://hdl.handle.net/11449/116305

10.1007/s10661-014-4116-8

WOS:000345368800038

Idioma(s)

eng

Publicador

Springer

Relação

Environmental Monitoring And Assessment

Direitos

closedAccess

Palavras-Chave #Bioremediation #Respirometry #Kinetics #Hydrocarbon
Tipo

info:eu-repo/semantics/article