Wastewater Treatment Technologies – Sequencing Batch Reactor (SBR)

There are a number of technologies available to treat wastewater including physicochemical, biological and advanced oxidation processes. We’re going to discuss a number of the options available over the coming weeks starting with a brief overview of the Sequencing Batch Reactor process.

Sequencing Batch Reactor (SBR) in Wastewater Treatment

By Maricel Pastor-Soltes – Coffey

The use of Sequencing Batch Reactor (SBR) process is rapidly increasing worldwide. The process provides improved process stability in the removal of BOD/COD and enhanced removal of nutrients (nitrogen and phosphorus).

The conventional SBR process has a unique operation wherein the treatment occurs in a single reactor and operates as a fill-and-draw activated sludge system. The operation is normally divided into fill, react, settle, decant, and idle cycle (See Figure 1 below). In the process of removing the BOD with nitrification, the air is introduced in the fill and react cycles. Sludge wasting is an important parameter in the system performance and usually takes place during the settle and idle cycle. There is normally no return activated sludge in the SBR.

Operation of Sequencing Batch Reactor System - Coftec

The process has proven its capability in the enhanced nutrients removal and high resistance to the fluctuating influent parameters. The system uses the same reactor for the solids separation, thus, negating the need for a separate clarification system and reducing the footprint of the plant.

At Coftec, we provide wide range of wastewater treatment solutions. We can provide you with an SBR system that is practically suitable to your treatment requirements. Our multi-disciplinary team of engineers and experts offer a proven track record of leveraging their expertise and experience in providing the most practical solutions to treat your wastewater.

Contact Coftec whether designing a new facility or refurbishing, expanding, or bringing an existing facility up to regulatory standards to discuss how we can help in your project.

To know more, Contact us at, tel: +353 (0)91 844356 or via a website inquiry.


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Contact our team of technical experts today. Whether it be water treatment, monitoring or purification, we’ll help to advise and guide on the best solution for your needs.