Enviraj|Sequencing Batch Reactor (SBR)

Enviraj Consulting

Sequencing Batch Reactor (SBR)

Sequencing Batch Reactor (SBR)
Overview	The sequencing batch reactor (SBR) is a fill-anddraw activated sludge system for wastewater treatment. In this system, wastewater is added to a single “batch” reactor, treated to remove undesirable components, and then discharged. Equalization, aeration, and clarification can all be achieved using a single batch reactor. To optimize the performance of the system, two or more batch reactors are used in a predetermined sequence of operations. SBR systems have been successfully used to treat both municipal and industrial wastewater. They are uniquely suited for wastewater treatment applications characterized by low or intermittent flow conditions
SBR operation for each tank for one cycle for the five discrete time periods of Fill, React, Settle, Draw, and Idle (Irvine and Ketchum, 2004).
How Does it Works	There are five stages in the treatment process: 1. Fill: The inlet valve opens and the tank is being filled in, while mixing is provided by mechanical means (no air). This stage is also called the anoxic stage. 2. React: Aeration of the mixed liquor is performed during the second stage by the use of fixed or floating mechanical pumps or by transferring air into fine bubble diffusers fixed to the floor of the tank. 3. Settle: No aeration or mixing is provided in the third stage and the settling of suspended solids starts. 4. Decent: During the fourth stage the outlet valve opens and the "clean" supernatant liquor exits the tank. 5. Idle: The period between draw and Fill is termed Idle. Despite its name, this “idle” time can be used effectively to waste settled sludge.
Pollutants Removed	COD, BOD, & Total Nitrogen
Area of Application	Municipal and Industrial
Environmental Footprint	Morderate
Area Footprint	Morderate
Treatment cost per Cubic Meter	Unknown
Capital Cost	unknown
O&M Cost	unknown
Data Sources:	https://www.iwapublishing.com/news/sequencing-batch-reactor https://www3.epa.gov/npdes/pubs/sbr_new.pdf https://en.wikipedia.org/wiki/Sequencing_batch_reactor