PROIMI   05436
PLANTA PILOTO DE PROCESOS INDUSTRIALES MICROBIOLOGICOS
Unidad Ejecutora - UE
capítulos de libros
Título:
Use of Actinobacteria Consortia to Improve Methoxychlor Bioremediation in Different Contaminated Matrices
Autor/es:
FUENTES, MARÍA S.; ALVAREZ, ANALÍA; SÁEZ, JULIANA M.; BENIMELI, CLAUDIA S.; AMOROSO, MARÍA J.
Libro:
Bioremediation in Latin America
Editorial:
Springer
Referencias:
Año: 2014; p. 267 - 277
Resumen:
Abstract Methoxychlor (MTX) is an organochlorine pesticide which has been banned in most countries; however, it is still being used in agricultural products and against mosquito. This pesticide has estrogenic activity and mimics endocrine hormone functions. Thus, it is important to analyze its behavior in different matrices. Actinobacteria present the ability to degrade this pesticide, and its use in mixed cultures for bioremediation purposes can be advantageous. Streptomyces spp. A3, A6, A12, A14, M7 and S. coelicolor A3 (2) were used as defi ned mixed cultures for MTX removal, after checking the absence of antagonistic effects among them. The consortium consisting of Streptomyces spp. A6, A12, A14,and M7 was selected. This defi ned mixed culture was able to grow in slurry bioreactors with or without stimulation, in the presence of MTX and also to remove it from stimulated and non-stimulated bioreactors. An increase about 10 % in MTX removal was observed in stimulated slurry bioreactors. MTX removal in soil was 56.4 %. Maximum microbial growth and the absence of stationary growth phase were both observed in soil when the consortium was grown in the presence of MTX, while the opposite was observed in soil without MTX. When comparing soil and slurries, similar removal percentages values can be observed but at a time almost three times higher in soil. Indeed, when analyzing ex situ bioremediation by slurries bioreactors, reduced processing times can be achieved, compared to in situ bioremediation. However, it is important to analyze the costs and benefits involved in using either bioremediation technique.