Por favor, use este identificador para citar o enlazar este ítem: http://repositorio.usfq.edu.ec/handle/23000/5363
Título : Removal of copper in a sulfate reducing bioreactor with a limestone pre-column system
Autor : Ochoa, Valeria (dir)
Méndez Silva, Gabriela Inés
Descriptores / Subjects : Microbiología
Sulfatos
Bioreactores
Fecha de Publicación : feb-2016
Ciudad: Editorial : Quito: USFQ, 2016
Cita Sugerida : Tesis (Magíster en Microbiología), Universidad San Francisco de Quito, Colegio de Postgrados; Quito, Ecuador, 2016
Descripción : The potential environmental hazard of acid mines drainages (AMD) is a problem that need to be addressed in mining regions worldwide; biological treatments catalyzed by sulfate reducing bacteria (SRB) present an interesting alternative because they are much cheaper and more efficient than conventional chemical and physical treatments. The objective of this research was to evaluate the metabolic activity of sulfate-reducing bacteria present in anaerobic samples collected near mining areas and different inoculum in batch assays amended with sulfate (2000 mg L-1) as electron acceptor and acetate (2.5g COD acetate L-1) as carbon source under environmental control conditions of pH and temperature. A physical, chemical and microbiological characterization of samples collected near mining regions was also carried out with samples collected from different sectors of Portovelo-Zaruma the most important mining region in Ecuador. Then, the presence of sulfate-reducing bacteria (SRB) in the same samples was evaluated through the measurement of sulfide production and sulfate reduction. Bioassays were conducted to determine the highest sulfate-reducing activity between the granular sludge of: the treatment plant of the National Brewery, the artificial lagoon of the University San Francisco de Quito (USFQ); and the sample collected near Oroporto mine (homogenized of the sediments and supernatant). The best inoculum evaluated was the sediment of the artificial lagoon at University San Francisco de Quito, showing a sulfate reducing activity of 7821.67 mg SO42- kg-1 VSS d-1 and a sulfide production of 4855.69 mg S2- kg-1 VSS d-1. The production of methane in the sediments of the artificial lagoon at USFQ was also monitored to study microbial competition under anaerobic conditions; obtaining a methanogenic activity of 0.0115 of g COD-CH4 g VSS-1 d-1 .
URI : http://repositorio.usfq.edu.ec/handle/23000/5363
Aparece en las colecciones: Tesis - Maestría en Microbiología

Archivos en este ítem:
Archivo Descripción Tamaño Formato  
123173.pdfTESIS A TEXTO COMPLETO1,15 MBAdobe PDFThumbnail
Visualizar/Abrir


Este ítem está sujeto a una licencia Creative Commons Licencia Creative Commons Creative Commons