Sequencing batch reactor technology: Concepts, design and experiences (abridged) - Discussion

The sequencing batch reactor is a specific fill-and-draw version of the act ivated-sludge process. In contrast to the continuous-flow alternative, meta bolic reactions and solid-liquid separation are carried out in one tank and in a well-defined and continuously repeated time sequence. This paper reviews the historical development of sequencing batch reactor t echnology and describes the different modes of operation. Mass-balance equa tions are introduced to allow for a quantitative comparison of sequencing b atch reactor and continuous-flow technologies and for the design of such sy stems. The initial design dynamic simulation and in-situ adjustment of the cycle program under the actual process conditions can be used conveniently to further optimize the sequencing batch reactor plant.