Fill-and-draw activated sludge treatment where aeration and settling happen in a single tank, in a timed sequence.
An SBR treats sewage in batches. A single reactor tank is filled with screened sewage, aerated so the biology consumes the organic load, allowed to settle, and then the clear supernatant is decanted — all controlled by timers and level sensors.
Because one tank performs several duties in sequence, the plant needs fewer civil structures and handles flow variation gracefully. Nitrogen and phosphorus removal can be built into the cycle.
Screened sewage enters the reactor tank.
Aeration on — biology consumes the organic load.
Aeration stops; sludge settles by gravity.
Clear water is decanted; excess sludge wasted.
All reaction phases happen in one tank, sequenced by the PLC.
Final specifications are engineered per site after requirement study.
An SBR cycle from fill to decant.