title: Biodegradation potential of oily sludge by pure and mixed bacterial cultures.
abstract: The biodegradation capacity of aliphatic and aromatic hydrocarbons of petrochemical oily sludge in liquid medium by a bacterial consortium and five pure bacterial cultures was analyzed. Three bacteria isolated from petrochemical oily sludge, identified as Stenotrophomonas acidaminiphila, Bacillus megaterium and Bacillus cibi, and two bacteria isolated from a soil contaminated by petrochemical waste, identified as Pseudomonas aeruginosa and Bacillus cereus demonstrated efficiency in oily sludge degradation when cultivated during 40 days. The bacterial consortium demonstrated an excellent oily sludge degradation capacity, reducing 90.7% of the aliphatic fraction and 51.8% of the aromatic fraction, as well as biosurfactant production capacity, achieving 39.4% reduction of surface tension of the culture medium and an emulsifying activity of 55.1%. The results indicated that the bacterial consortium has potential to be applied in bioremediation of petrochemical oily sludge contaminated environments, favoring the reduction of environmental passives and increasing industrial productivity.
authors: Department of Microbiology, Federal University of Rio Grande do Sul, Sarmento Leite, 500, CEP 90050-170, Porto Alegre, RS, Brazil. vanescerqueira@yahoo.com.br
authors: Vanessa S
authors: VS
authors: Cerqueira
authors: Emanuel B
authors: EB
authors: Hollenbach
authors: Franciele
authors: F
authors: Maboni
authors: Marilene H
authors: MH
authors: Vainstein
authors: Flávio A O
authors: FA
authors: Camargo
authors: Maria
authors: M
authors: do Carmo R Peralba
authors: Fátima M
authors: FM
authors: Bento
mesh_terms: D001407:Bacillus / Q000378:metabolism; D001410:Bacillus megaterium / Q000378:metabolism; D001419:Bacteria / Q000378:metabolism*; D001673:Biodegradation, Environmental; D001709:Biotechnology / Q000379:methods*; D003470:Culture Media / Q000737:chemistry; D006838:Hydrocarbons / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D009153:Mutagens; D009821:Oils; D010578:Petroleum / Q000378:metabolism; D012722:Sewage / Q000382:microbiology*; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000378:metabolism; D020588:Stenotrophomonas / Q000378:metabolism; D013500:Surface Tension; D013501:Surface-Active Agents / Q000737:chemistry; D013696:Temperature; D013997:Time Factors
chemical_list: D003470:Culture Media; D006838:Hydrocarbons; D009153:Mutagens; D009821:Oils; D010578:Petroleum; D012722:Sewage; D012989:Soil Pollutants; D013501:Surface-Active Agents