SBR’s (Sequencing Batch Reactors) are a secondary treatment process which biologically remove the contaminants in wastewater. SBR’s differ to conventional activated sludge in that they are a batch process rather than a continuous process, and aeration and settlement is carried out in one tank.

SBR’s operate in a cycle which is continually repeated which comprises fill, react, settle and decant. A ‘true batch’ SBR does not fill during react, settle and decant, whilst the continuous type of SBR fills during some or all of the other phases of the cycle.

SBR’s are the optimum biological process solution for most wastewater treatment problems in domestic, municipal, and industrial plants. They offer a number of advantages over conventional treatment, including reduced capital and operating costs, flexible and robust process operation with high quality effluent.