The Sequential Batch Reactor (SBR) is not a niche technology; it is one of the most widely deployed biological treatment systems in both municipal and industrial wastewater management. Its core advantage is versatility: because SBR operates in timed cycles rather than continuous flow, its treatment programme can be adjusted for different wastewater characteristics without changing the physical plant. This makes Sequential Batch Reactor applications unusually diverse, spanning industries with very different effluent types and volumes.