Development of an air-scour control system for membrane bioreactors
- Ferrero, Giuliana
- Ignasi Rodríguez-Roda Layret Zuzendaria
- Joaquim Comas Matas Zuzendaria
Defentsa unibertsitatea: Universitat de Girona
Fecha de defensa: 2011(e)ko uztaila-(a)k 01
- Joan Mata-Álvarez Presidentea
- Ramon Vilanova Arbós Idazkaria
- Christian Rosen Kidea
- Juan M. Garrido Fernández Kidea
- Luis Maria Sancho Seuma Kidea
Mota: Tesia
Laburpena
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.