Fill, react, settle and decant in a single tank — flexible, compact biological treatment with excellent nutrient removal.
An SBR does everything a conventional plant needs several tanks for — aeration, settling and decanting — within a single reactor, in timed cycles. That makes it compact, flexible and easy to tune, with strong nitrogen and phosphorus removal. CWG designs and builds SBR plants for municipal and industrial effluent across Pakistan.
A Sequencing Batch Reactor treats wastewater in timed cycles within one tank: it fills, aerates and reacts, then lets the biomass settle, and finally decants the clear treated water off the top.
Because reaction and settling happen in the same tank at different times, no separate secondary clarifier is needed — and the cycle can be tuned to favour carbon, nitrogen or phosphorus removal.
Fully automated controls sequence each phase, so the plant adapts to varying flow and load while staying compact and simple to house.
One tank cycles through fill, react, settle and decant phases to treat each batch of wastewater in turn.
Wastewater fills the reactor, often with initial mixing or aeration.
Aeration drives biological breakdown of organics and nutrients.
Aeration stops and the biomass settles cleanly to the tank floor.
Clear treated water is decanted off the top; the cycle then repeats.
Aeration and settling in one tank — no separate clarifier.
Cycle times adjust to favour carbon, nitrogen or phosphorus removal.
Well-suited to strict N and P discharge limits.
Batch operation absorbs peaks and quiet periods.
PLC control sequences every phase reliably.
Add reactors or extend cycles as load grows.
Combines reaction and settling in one tank — no separate clarifier or return-sludge line.
More flexible cycle-based nutrient control, in a single automated reactor.
Batch operation rides out variable flows that upset continuous plants.
Where sites are tight and flows swing through the day, the SBR’s single-tank, automated, tunable design fits neatly — delivering strong treatment and nutrient removal without the space or complexity of a multi-tank plant.
Since 1998, CWG Watch Water Technology has delivered advanced water & wastewater solutions across Pakistan — wastewater plants, RO, demineralization, softening, filtration, specialty chemicals and complete plant engineering. With decades of experience, international technology partnerships and a proven portfolio, we design customised MBBR solutions built specifically for Pakistan’s industrial requirements.
Share your flow profile and discharge targets, and CWG will design an SBR plant tuned for compact, compliant treatment.
