Journal
WATER RESEARCH
Volume 79, Issue -, Pages 1-9Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2015.03.032
Keywords
Air scour; Control; Energy savings; Full scale; MBR; Optimization
Funding
- Spanish Ministry of Economy and Competitiveness [CDTI- IDI20110304, CTM2012-38314-C02-01, PCIN-2013-074]
- People Programme (Marie Curie Actions) of the Seventh Framework Programme of the European Union [289193]
- ACCIO [600388]
- Catalan Agency for the Technical Valorisation [VALOR 2010-00170]
- Catalan Government [2014-SGR-1168]
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Membrane aeration represents between 35 and 50% of the operational cost of membrane bioreactors (MBR). New automatic control systems and/or module configurations have been developed for aeration optimization. In this paper, we briefly describe an innovative MBR air scour control system based on permeability evolution and present the results of a full-scale validation that lasted over a 1-year period. An average reduction in the air scour flow rate of 13% was achieved, limiting the maximum reduction to 20%. This averaged reduction corresponded to a decrease in energy consumption for membrane aeration of 14% (0.025 kWh m(-3)) with maximum saving rates of 22% (0.04 kWh m(-3)). Permeability and fouling rate evolution were not affected by the air scour control system, as very similar behavior was observed for these variables for both filtration lines throughout the entire experimental evaluation period of 1 year. (C) 2015 Elsevier Ltd. All rights reserved.
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