Development of an air-scour control system for membrane bioreactors
- Ferrero, Giuliana
- Ignasi Rodríguez-Roda Layret Director
- Joaquim Comas Matas Director
Universidade de defensa: Universitat de Girona
Fecha de defensa: 01 de xullo de 2011
- Joan Mata-Álvarez Presidente/a
- Ramon Vilanova Arbós Secretario/a
- Christian Rosen Vogal
- Juan M. Garrido Fernández Vogal
- Luis Maria Sancho Seuma Vogal
Tipo: Tese
Resumo
The thesis involves the development and implementation of a new and robust control system based on permeability trends but at the same time capable of reducing aeration proportionally to permeate flux. Permeability was made a key parameter for directly comparing temporary changes in membrane performance. Transmembrane pressure and flux were gathered every 10 seconds and permeability values were automatically calculated; different mathematical algorithms were applied for the signal filtering of on-line data. Short term and long term permeability trends were compared once a day, and a control action was applied proportionally to the short term/long term permeability ratio without exceeding the aeration flow recommended by the membrane suppliers.