Adsorbentes preparados a partir de residuos y su aplicación en la eliminación de compuestos causantes de olores (NH3 y H2S)
This thesis is focused on two environmental issues. The first one is the recovery of different wastes, such as sewage sludge and fly ashes, and the second one is related to the removal of odour causing compounds which are generated in the same waste water treatment plant (WWTP), like NH3 and H2S. Di...
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Format: | Doctoral Thesis |
Language: | Spanish English |
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Universitat de Girona
2012
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Online Access: | http://hdl.handle.net/10803/101206 |
Summary: | This thesis is focused on two environmental issues. The first one is the recovery of different wastes, such as sewage sludge and fly ashes, and the second one is related to the removal of odour causing compounds which are generated in the same waste water treatment plant (WWTP), like NH3 and H2S. Direct alkaline activation with NaOH and KOH of two sludges which have different specific treatments in the sewage sludge line, has been studied, and it has been compared with the activation of their chars. Two different heating mechanisms were applied: conventional heating and microwave oven heating. All the sewage sludge-derived materials are tested for NH3 removal adsorption experiments. On the other hand it has been studied the preparation of adsorbents by mixing on sewage sludge with fly ashes heated in a microwave oven. The materials adsorbents have a limited development of porosity and are tested for H2S removal. === Esta tesis se centra en dos problemáticas medioambientales. Una es la valorización de residuos, como son los lodos de depuradora y cenizas volantes, y la otra incide en la eliminación de compuestos causantes de malos olores que se generan en las estaciones depuradoras de agua residual (EDARs), como son el NH3 y el H2S. Se ha estudiado la activación alcalina directa con NaOH y KOH de dos lodos, que emplean procesos diferentes en su línea de lodos, y se ha comparado con la activación de sus respectivos pirolizados, usando dos tipos de calentamiento: convencional y microondas. Todos estos materiales se han aplicado a la eliminación de NH3. Por otro lado se estudió la obtención de adsorbentes a partir de un lodo mezclado con distintas proporciones de cenizas volantes en un horno microondas. Estos materiales presentan un desarrollo de la porosidad limitado, y han sido empleados para la eliminación de H2S. |
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