Global pressures, specific responses: effects of nutrient enrichment in streams from different biomes

13 p. + 2 p. (Erratum)

Mechanisms implied in Escherichia coli removal during wastewater treatment

Poster presentado 12th Symposium on Aquatic Microbial Ecology (SAME12) August 28 – September 02, 2011 Germany , Rostock–Warnemünde

Distribución de "coxiella burnetii" en los rumiantes domésticos y en la fauna silvestre de la Comunidad Atutónoma Vasca. Evaluacióndel efecto del tratamiento antibiótico y de la vacunación en el control de la fiebre Q en rebaños ovinos naturalmente infectados

243 p. : il.

Mechanisms involved in Escherichia coli and Serratia marcescens removal during activated sludge wastewater treatment

Wastewater treatment reduces environmental contamination by removing gross solids and mitigating the effects of pollution. Treatment also reduces the number of indicator organisms and pathogens. In this work, the fates of two coliform bacteria, Escherichia coli and Serratia marcescens, were analyzed in an activated sludge process to determine the main mechanisms involved in the reduction of pathogenic microorganisms during wastewater treatment. These bacteria, modified to express green fluorescent protein, were inoculated in an activated sludge unit and in batch systems containing wastewater. The results suggested that, among the different biological factors implied in bacterial removal, bacterivorous protozoa play a key role. Moreover, a representative number of bacteria persisted in the system as free-living or embedded cells, but their distribution into liquid or solid fractions varied depending on the bacterium tested, questioning the real value of bacterial indicators for the control of wastewater treatment process. Additionally, viable but nonculturable cells constituted an important part of the bacterial population adhered to solid fractions, what can be derived from the competition relationships with native bacteria, present in high densities in this environment. These facts, taken together, emphasize the need for reliable quantitative and qualitative analysis tools for the evaluation of pathogenic microbial composition in sludge, which could represent an undefined risk to public health and ecosystem functions when considering its recycling.

Marketing de servicios financieros: analisis teórico y estudio de casos

(ES)Este trabajo de fin de grado, se centra en conocer y comprender la singularidad del marketing aplicado a los servicios financieros atendiendo a sus características, aplicaciones, desarrollos y funciones y objetivos. Para ello, el trabajo comenzará por un análisis teórico elaborado tras la revisión crítica de la bibliografía referenciada al final del trabajo. Continuará con un estudio empírico en el que analizaremos diferentes estrategias y acciones de marketing llevadas a cabo por dos entidades bancarias españolas de características diferentes: BBVA y EVO Banco. Por último, concluiremos el trabajo con la enumeración de las principales conclusiones extraídas de nuestra investigación y en relación a la Bibliografía y Webgrafía consultada.