Reliable gravity clarification that settles coagulated solids out of water and wastewater — the proven workhorse for large, steady flows.
When flows are large and solids will settle, a well-designed gravity clarifier is the simplest, lowest-energy way to produce clear water. CWG builds circular and tube-settler clarifiers for water works, municipal and heavy-industrial applications — as primary, secondary or tertiary stages.
A conventional clarifier uses gravity to separate suspended solids from water. After coagulation and flocculation form dense flocs, the water enters a large tank where flocs settle to the bottom as sludge.
Clarified water overflows from the top while a slow-moving rake collects and withdraws the settled sludge from the floor for further handling.
Tube- or plate-settler internals can be added to increase the effective settling area, letting a smaller tank handle the same flow.
Coagulated water enters a quiescent tank where solids settle out under gravity and clear water overflows.
Coagulant destabilises fine suspended particles so they can join together.
Gentle mixing grows the particles into larger, heavier flocs.
In the still clarifier zone, flocs settle to the floor as sludge.
A rake sweeps settled sludge to a central hopper for withdrawal, while clear water overflows.
Few moving parts and decades of proven operation.
Gravity does the work — minimal power required.
Well suited to municipal and heavy-industrial volumes.
Straightforward to run with modest chemical and maintenance needs.
Works as a primary, secondary or tertiary stage.
Optional internals boost capacity without a bigger tank.
Best where solids settle readily and flows are large; DAF suits light or oily solids.
Removes the bulk of solids first, protecting and extending downstream filters.
A far lower-cost first stage for high solids loads before fine polishing.
For water utilities and large process industries, gravity clarification remains the most economical first step in producing clear water — low-energy, dependable and easy to operate at the scale Pakistani infrastructure needs.
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 water and wastewater treatment solutions built specifically for Pakistan’s industrial requirements.
Give us your flow and solids load, and CWG will design a circular or tube-settler clarifier sized for the job.
