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1	Operation and control of SBR processes for enhanced biological nutrient removal from wastewater Puig Broch, Sebastià 15 January 2008 (has links) In the last decades, the awareness of environmental issues has increased in society considerably. There is an increasing need to improve the effluent quality of domestic wastewater treatment processes. This thesis describes the application of the Sequencing Batch Reactor (SBR) technology for Biological Nutrient Removal (BNR) from the wastewater. In particular, the work presented evolves from the nitrogen removal to the biological nutrient removal (i.e. nitrogen plus phosphorous removal) with special attention to the operational strategy design, the identification of possible reactor cycle controls or the influent composition related to the process efficiency. In such sense, also the use of ethanol as an external carbon (when low influent Carbon:Phosphorus (C:P) or Carbon:Nitrogen (C:N) ratios are presented) are studied as an alternative to maintain the BNR efficiency. Carbon source Aguas residuales Aigües residuals Wastewater Eliminación de nutrientes Eliminació de nutrients Nutrient removal Ethanol Etanol Sequencing Batch Reactor control SBR control Fuentes de carbono Fonts de carboni 504 628