Effect of keratinous waste addition on improvement of crude oil hydrocarbon removal by a hydrocarbon-degrading and keratinolytic mixed culture |
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| Authors: | E Cervantes-González LI Rojas-Avelizapa R Cruz-Camarillo NG Rojas-Avelizapa |
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| Institution: | 1. Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas IPN, Carpio y Plan de Ayala S/N, Col. Casco de Santo Tomás, México 11340, D.F., Mexico;2. Universidad Autónoma de San Luis Potosí, Coordinación Académica Región Altiplano, Carretera a Cedral Km 5+600, San José de las Trojes, 78700 Matehuala, San Luis Potosí, Mexico;3. Departamento de Investigación, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada IPN, Cerro Blanco 141, Colinas del Cimatario, Santiago de Querétaro 76090 Querétaro, Mexico;1. Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS), Campus C2.3, D-66123 Saarbrücken, Germany;2. Pharmaceutical and Medicinal Chemistry, Saarland University, Campus C2.3, D-66123 Saarbrücken, Germany |
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| Abstract: | The aim of this work was to evaluate the effect of keratinous waste addition on oil-hydrocarbon removal, through a mixed culture of oil-degrading bacteria, with the ability to secrete keratinases. The mixed culture was grown in the media with oil, or oil supplemented with chicken-feathers as the keratinous waste. Residual oil-hydrocarbons were determined as total petroleum hydrocarbons (TPHs) and oil fractions and then quantified by GC–FID and GC–MS.Results showed that in presence of the keratinous waste, the removal of oil-hydrocarbons was 57,400 mg l?1, meanwhile the treatment without waste presented an oil-hydrocarbons removal of 35,600 mg l?1. The aliphatic fraction was the most removed in both treatments. In addition, chromatographic profiles indicated that the aliphatic fraction showed different degradation pattern; in the presence of keratinous wastes, the C18 to C28 compounds were preferably removed over the C10 to C17. The addition of keratinous waste not only improved the oil-hydrocarbons removal but, it changed the removal pattern of the target hydrocarbons. |
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