SEQUENCING BATCH REACTORS
The sequencing batch reactor (SBR) is a batch process for treating wastewater. This process is capable of achieving biological P removal, nitrification, denitrification and BOD5 removal in one reactor.
Sequencing batch reactors are suitable for plants that need flexibility and control or that have limited space available. One bioreactor serves as a multipurpose reactor. Cycles that occur in the SBR process are anaerobic, anoxic, react, settling, decant and idle cycles.
The reactor is also used for settling the mixed liquor and decanting the treated wastewater, thus eliminating the need for a secondary clarifier. The liquid level in the reactor and the cycle time can be varied, allowing for the flexibility required to acheive the various processes. A typical operation consists of three or four cycles per day.
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