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Towards integrated operation of membrane bioreactors : effects of aeration on biological and filtration performance
Dalmau Figueras, Montserrat; Monclús Sales, Hèctor; Gabarrón Fernández, Sara; Rodríguez-Roda Layret, Ignasi; Comas Matas, Joaquim
Two experimental studies evaluated the effect of aerobic and membrane aeration changes on sludge properties, biological nutrient removal and filtration processes in a pilot plant membrane bioreactor. The optimal operating conditions were found at an aerobic dissolved oxygen set-point (DO) of 0.5mgO2L-1 and a membrane specific aeration demand (SADm) of 1mh-1, where membrane aeration can be used for nitrification. Under these conditions, a total flow reduction of 42% was achieved (75% energy reduction) without compromising nutrient removal efficiencies, maintaining sludge characteristics and controlled filtration. Below these optimal operating conditions, the nutrient removal efficiency was reduced, increasing 20% for soluble microbial products, 14% for capillarity suction time and reducing a 15% for filterability. Below this DO set-point, fouling increased with a transmembrane pressure 75% higher. SADm below 1mh-1 doubled the values of transmembrane pressure, without recovery after achieving the initial conditions
Bioreactors
Reactors de membrana
Membrane reactors
Aigües residuals -- Depuració -- Tractament biològic
Sewage -- Purification -- Biological treatment
Membranes (Tecnologia)
Membranes (Technology)
Tots els drets reservats
info:eu-repo/semantics/closedAccess
Artículo
info:eu-repo/semantics/publishedVersion
Elsevier
         

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