Résumé :
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This issue of the IWA Scientific and Technical Report Series provides an in-depth summary of and scientific background to periodic processes. Specifically, attention is given to what is commonly referred to as Sequencing Batch Reactor (SBR) Technology. The report highlights various types of SBRs, design considerations and procedures, equipment required, and experiences gained from practical applications. This report will help both designers and operators of SBRs understand how to use this technology successfully. The focus is on the application of fill-and-draw, variable volume, periodically-operated, unsteady-state principles to activated sludge systems. The same concepts have been successfully applied to other systems including anaerobic reactors, biofilm reactor, biofiltration, solid phase and slurry reactor for the treatment of contamined waters, wastewater, gases, and soils. Results from bench, pilot and full scle SBRs are summarized. Also included is a description of trends for technological developments, and a discussion of open questions regarding research, development, application and operation that are in search of answers.
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