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Sequencing Batch Reactor
Sequencing Batch Reactor are industrial processing tanks for the treatment of wastewater. SBR reactors treat waste water such as sewage or output from anaerobic digester or mechanical biological treatment facilities in batches. Oxygen is bubbled through the waste water to reduce biochemical oxygen demand (BOD) and chemical oxygen demand (COD) to make suitable for discharge into sewers or for use on land.
A biological treatment can be done in one single tank. In this case the water has to be treated in batch.
Generally, there are 4 phases in one treatment cycle:
  • Filling the reactor with fresh influent water
  • Aerating the reactor with air to supply oxygen for the bacteria so they can consume the unwanted compounds in the water
  • Sedimentation to separate bacterial sludge from clean effluent
  • Emptying the tank by removing clean water .
Optionally, an anaerobic phase can be added in the batch process for nitrogen removal (denitrification).
A sequencing batch reactor (SBR) needs a relatively large tank to buffer the water during the treatment of a batch. The large tank also has the purpose to homogenize the waste water.
An SBR does have a restricted hydraulic capacity. When the capacity of waste water is too big, it is no longer interesting to work in batches. In that case it would be better to switch to a continuous system.
Sometimes, an additional filtration step is necessary for the post-treatment of the purified water. In this case, the use of an active carbon filter, sand filter or ultra-filtration is considered.
ECOTEREN can help you with this technology, both in design and construction of the installation.
We provide also the following solution for sewage treatment:

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Chisinau, Moldova


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