Sequential Batch Reactor (SBR)

SBR is a high-performance solution for wastewater treatment that can successfully handle batch and continuous flow operations. It is a proven technology with minimal costs and maintenance requirements. Due to high removal capacity and versatility, it is compliant with stringent discharge standards. Biological process and high-quality product generation are the distinct qualities of SBR based sewage treatment plant.

Due to streamlined design, Cleantech SBR small Sewage Treatment Plant is one of the most favored wastewater treatment systems today. This highly flexible technology is useful in a wide variety of applications.

What is SBR based wastewater treatment?

SBR process is a widely used water treatment method in the developed countries from quite a long time. It has become popular in India, China, and other Asian countries in the recent years. When sewage is sent to the SBR Tank (also known as Reaction tank) one batch at a time, an activated sludge process gets activated. Timed sequence of operations occurs in the SBR tank and water gets purified. Here is the timed sequence if events:

Filling:It is the first stage of the process where the influent wastewater is filled in the first tank. It is important that the water gets filled with a controlled yet rapid flow so that the Food to Microorganism Ratio remains appropriate. It is similar to the selector mechanism which ensures sufficient growth of microorganisms that have better settling characteristics..

Aeration: In the reaction stage, microorganisms use Ammonia, Nitrogen or BOD (Biochemical Oxygen Demand). The degree of treatment is directly proportional to the sludge mass and the time taken for aeration. It also depends on the strength of the wastewater (or the level of impurities) and the degree of nitrification. It is the rate of conversion of Ammonia into nitrate or nitrite of less toxicity.

Settling: Settling takes around 60 minutes to 90 minutes depending on the number of cycles per day. In this process, aeration stops and sludge gets settled. Cleat, effluent water gets accumulated over the sludge blanket.

Decanting: Decanting is the process of removing the effluent from the tank without disturbing the sludge settled at the bottom.

Idling: Idling is the waiting time between two filling cycles.

Sludge Wasting: When sludge gets accumulated beyond a threshold level, it has to be discharged from the system. Sludge wasting process controls the quality of effluent water and the population of microorganisms. Two parameters are adjusted to keep better control over the quality of sludge wasting.