410 resultados para Umbral anaeróbico


Relevância:

20.00% 20.00%

Publicador:

Resumo:

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Incluye Bibliografía

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Incluye Bibliografía

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Relevância:

20.00% 20.00%

Publicador:

Resumo:

El objetivo de este documento es dimensionar tanto el grado de heterogeneidad estructural que caracteriza a la economía de Brasil, como los esfuerzos que debiera realizar el país para reducir las brechas de productividad, empleo y desigualdad para alcanzar el umbral del desarrollo.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Pós-graduação em Medicina Veterinária - FMVZ

Relevância:

20.00% 20.00%

Publicador:

Resumo:

The treatment of domestic and industrial effluents through Wastewater Treatment Plants (WTPs) generates a residue termed sewage sludge, rich in organic matter, high-volume, occasionally containing pathogens and heavy metals. The sludge generation can minimize the benefits brought by the treatment of sewage, because this residue does not always receive appropriate treatment before final disposal. The disposal is another problem related to sludge. Landfills generally does not have physical space and alternatives such as the use in agriculture requires an intense treatment that could be in many cases operational or economic unfeasible. The objective of this work is the theoretical research about the processes of stabilization of the sludge by anaerobic digestion and the methanogenic activity during the process. Through analysis of each step and contemplating each relevant factor in anaerobic digestion process in order to optimize them, we proposed a theoretical model of reactors capable of stabilize the sludge, reduce its volume and eliminate pathogens. The obtained configuration consists of two anaerobic reactors connected in series. The first one operates in the range mesophilic temperature (35 ° C) and has higher hydraulic retention time (25 days) working primarily in the stabilization of organic matter present in the sludge and producing biogas, whereas the second one operates in the thermophilic range (55 ° C) in order to eliminate pathogens, and to reduce the volume. The hydraulic retention time in the second reactor is lower (10 days). Both mesophilic and thermophilic processes were efficient in what was proposed, promoting the stabilization of organic matter present in the sludge and significant reduction of pathogens. As a final step with the sludge previously digested, it is indicated a final dehydration... (Complete abstract click electronic access below)

Relevância:

20.00% 20.00%

Publicador:

Resumo:

This study aimed to develop, implement and evaluate the performance of a new type of bioreactor for anaerobic treatment of wastewater using different filling materials like trickling filters post-reactor. This bioreactor has mixed characteristics of the UASB reactors and horizontal flow from the point of view of removal of BOD (Biochemical Oxygen Demand) ssed (settled solids), TS (Total Solids), SS (Suspended Solid), SD (Dissolved Solids) and turbidity. The experimental model consists of a bioreactor with a volume of 12 m³, 2/3 filled by fluidized bed and 1/3 for fixed. The fluidized bed is made of polystyrene plates used as a system percolation and compartmentalized trickling filters, where each compartment was filled with a support medium with different characteristics (gravel number 4, plastic rings of polystyrene, PET and HDPE) . In addition, the output of a filter system was installed three entries filled with activated carbon. The bioreactor was installed in private residence in the city of Igarapava-SP (20° 02'40.18"S and 47° 45'01.36" W). The system was highly efficient as the removal of organic contaminant load 92% on average reducing the BOD, a significant result when compared to other anaerobic systems. For the other parameters, the mean reduction was 96% for turbidity, 99% ssed, 67.5% ST, 57% SD and 88% of SS. As for its operation the system was capable of operating in continuous flow without the need for maintenance during the entire period of evaluation and without energy, as it operates taking advantage of the natural slope of the terrain where it is installed. The environmental impacts were minimized due to the preservation of local vegetation allowing the ecosystem to remain unchanged beyond the prototype was completely sealed preventing exhalation of odors and therefore not causing inconvenience to neighboring populations. Given these facts it was concluded that the prototype is shown to be highly feasible deployed as a new alternative for treatment of sewage in rural and urban settings (individual homes, condos, farms, ranches, etc.) Due to ease of design and operability, and sustainability at all stages of execution.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Recolección y selección del material de campo del 2009- 2010. Desarrollo y registro de un taller de construcción de artefactos didácticos antes de salir a campo, desde la escena conjetural. 2011- Reconocimiento de un campo complejo: practicante. Tutor: guiones conjetúrales. Planificaciones institucionales y propuestas didácticas alternativas. Se trata de las actividades efectivamente realizadas durante el período de referencia. Pueden ser las mismas que las incluidas en el Proyecto, pero también pueden aparecer nuevas actividades que no hayan sido previstas originalmente. Esta sección puede ser publicada en la página de la Facultad y de la Universidad. Selección de marcos teóricos. Lectura, fichaje y trabajo en ateneo interno. Participación del Foro de formación docente, organizado por el Área de formación docente de la F. de H y Cs. Sociales de la UNaM 27,28 y 29 de septiembre de 2012, presentamos un Poster y una ponencia en el Taller de las Practicas donde hemos socializado nuestras reflexiones y trabajos de campo.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Este proyecto de investigación - acción surge como extensión del proyecto “Trabajo intensivo en los umbrales escolares para la alfabetización en Misiones. Parte II” con objeto y metas particulares en tanto constituye una intervención focalizada en espacios de umbrales de escuelas periurbanas. El foco de análisis es la instalación de aulas alfabetizadoras con mecanismos de traducción intercultural basados en la conversación oral sobre la vida cotidiana, en tanto práctica que asegura la continuidad semiótica en los espacios de iniciación.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Actividades desarrolladas durante el período: recolección y selección del material de campo del 2009- 2010; desarrollo y registro de un taller de construcción de artefactos didácticos antes de salir a campo, desde la escena conjetural; reconocimiento de un campo complejo: practicante. Tutor: guiones conjetúrales. Planificaciones institucionales y propuestas didácticas alternativas; Se trata de las actividades efectivamente realizadas durante el período de referencia. Pueden ser las mismas que las incluidas en el Proyecto, pero también pueden aparecer nuevas actividades que no hayan sido previstas originalmente. Esta sección puede ser publicada en la página de la Facultad y de la Universidad; selección de marcos teóricos. Lectura, fichaje y trabajo en ateneo interno.