Page 15 - Simplified Wastewater Treatment Fundamentals\SBR

Sequential Batch Reactors (SBR)

Single SBR Operation

Conventional SBR treats wastewater in batches. While a batch of wastewater is

being treated, influent wastewater is either stored in a flow equalization tank or

routed to another SBR.

Flow equalization provides hydraulic buffering and serves to control the fill rate of

a batch.

Single SBR operation depends on upstream flow equalization, or the ability of a

large wet well to retain flow until the single SBR can treat another batch of

wastewater. There are SBR designs which allow for continuous flow into a single

tank, but the tank must have a separate mixing zone to allow for wastewater to mix

and partially aerate separately, while the single active tank is settling and

decanting.