10 resultados para Araña viuda negra

em Archivo Digital para la Docencia y la Investigación - Repositorio Institucional de la Universidad del País Vasco


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1 tarjeta postal y 1 carta (manuscritas) ; entre 140x90mm y 215x275mm

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[EN]Due to the limitations associated with fossil fuels it is necessary to promote energy sources that are renewable as well as eco-friendly, such as biogas generated in anaerobic digesters. The biogas, composed principally of methane and CO2, is the result of the biodegradation of organic matter under anaerobic conditions. Its use as fuel is limited by the presence of minority compounds such as hydrogen sulphide (H2S); therefore, its pre-treatment is necessary. Currently there are various technologies for the removal of H2S from a gas stream, but most of them are based on physic-chemical treatments which have a number of drawbacks as reactive consumption, generation of secondary flows, etc. Biofiltration has been used as an efficient and low cost alternative to conventional purification processes, and excellent results for the degradation of H2S have been obtained. However process can be limited due to the progressive ageing of the support material, along with the loss of nutrients and other specific characteristics necessary for the good development of biomass. The purpose of this project is to develop a mixed support consisting of a mixture of an organic material and an inorganic support for its application in the removal of the H2S from biogas. This support material helps to optimize the characteristics of the bed and extend its lifespan. The development of such material will contribute to the implementation of biofiltration for treating biogas from anaerobic digesters for its use as biofuel. The inorganic material used is electric arc furnace (EAF) black slag, a by-product generated in large quantities in the production of steel in the Basque Country. Although traditionally the slag has been used in civil engineering, its physicochemical characteristics make it suitable for reuse as a filter medium in biofiltration. The main conclusion drawn from the experimental results is that EAF black slag is a suitable co-packing material in organic biofilters treating H2S-polluted gaseous streams. High pollutant removal rates have been achieved during the whole experimental period. The removal capacity recorded in biofilters with less inorganic material was higher than in those with higher slag portion. Nevertheless, all the biofilters have shown a satisfactory response even at high inlet loads (48 g·m-3·h-1), where the RE has not decreased over 82%.

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Antonio Duplá Ansuategui, Piedad Frías Nogales e Iban Zaldúa (editores)

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10 cartas (mecanografiadas y manuscritas) ; entre 210x230mm y 155x215mm. Ubicación: Caja 1 - Carpeta 66

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8 cartas (mecanografiadas) ; entre 210x300mm y 215x140mm.- 1 carta de Justo Garate a Belausteguigoitia en 1968 (mecanografiada) ; 225x175mm.- 1 esquela de la viuda de Belausteguigoitia ; 120x70mm

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¿Interrumpió la aparición del Cristianismo el lento deambular de la cultura romana hacia no sabemos dónde? O, por el contrario, ¿vino a reforzar los elementos culturales que habían venido sedimentándose desde tiempos lejanos para confluir en lo que conocemos hoy como civilización romano-cristiana? La relación del mundo judío con el helenismo fue tormentosa, la relación con el mundo romano fue variable. De protegidos pasaron a ser perseguidos, y otro tanto de lo mismo les ocurrió a los cristianos. Es posible detectar esa sorda lucha en diversas manifestaciones que se abordan en la presente obra: desde la aparición, proceso y muerte del Nazareno hasta la victoria del Cristianismo con Constantino, la unión con el fantasma, el luto de la viuda, el derecho de asilo del perseguido por la injusticia, las uniones desiguales, etc.

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Índice: - Una historia de España audiovisual y joseantoniana. - El franquismo en el cine: “Amaya”. - El franquismo combate la “leyenda negra”: “Alba de América”. - El colonialismo truncado en la elipsis: “La canción de Aixa”. - Otras películas sobre memoria e historia en la España de la postguerra.