"Some Particles Are Too Light to Settle. That's Where Flotation Comes In."
Innovacorp India manufactures and supplies flotation flocculants for DAF systems in Assam, where conventional settling is not enough to remove fine particles, colour bodies and low-density solids from effluent. In textile dyeing, paper mills and rubber processing, the particles that cause turbidity and colour are often too light or too slow to settle. Flotation flocculants bind those particles into flocs that attach to air bubbles and rise to the surface, where they can be removed as scum. Our range is matched to the particle type and the DAF system design.
In settling, the floc is denser than water and sinks to the bottom. In flotation, the floc is attached to air bubbles and rises to the surface, where it is removed as scum. That difference changes the flocculant requirement. Settling flocculants are designed to build large, dense flocs that sink quickly. Flotation flocculants are designed to build flocs that are buoyant enough to attach to air bubbles and strong enough to survive the turbulence of the DAF system. A flocculant that works well in a clarifier may not work well in a DAF unit, and vice versa.
A DAF system releases pressurised water with dissolved air into the treatment tank. As the pressure drops, the air comes out of solution as micro-bubbles, which attach to the flocs and carry them to the surface. The flocculant's job is to build flocs that are large enough and have the right surface properties to attach to those bubbles. The flocculant also needs to survive the shear created by the air injection and the recycle flow, because a floc that breaks apart before it reaches the surface will not be removed.
There is no single flotation flocculant that fits every DAF unit. The choice depends on the particle type — dye molecules, fibres, oil droplets, algae — and on the DAF system's design, including the recycle ratio, the air-to-solids ratio and the surface loading rate. In Assam, where textile effluent and paper mill white water are the main applications, the flocculant is often selected by a jar test followed by a DAF trial. For the chemistry side, see our flocculant for effluent treatment and sludge dewatering.
Flotation flocculants follow the same charge logic as settling flocculants. Anionic flocculants are used where the particles are positively charged, or where a larger, denser floc is needed. Cationic flocculants are used where the particles are negatively charged, which is common in dye-bearing effluent and biological sludge. Non-ionic flocculants are used where the charge interaction is less important. In DAF applications, the flocculant is often used alongside a coagulant like PAC or alum, which destabilises the particles before the flocculant builds the floc.
Plants sometimes treat the DAF unit as a black box and adjust only the flocculant dose when the effluent quality drops. In practice, the problem is often elsewhere — the coagulant dose, the pH, the air-to-solids ratio or the recycle flow. If the floc is not forming properly because the coagulant dose is wrong, more flocculant will not fix the effluent. Checking the whole DAF train before adjusting the flocculant dose is the step that most often explains why two plants using the same product report different results.
Typical parameters buyers ask about include molecular weight, charge density, active content, pH of the solution and shelf life. Exact values differ by polymer type, and are confirmed on the product TDS. Final specification is confirmed after a jar test and a DAF trial on your own effluent.
Dosage is set in ppm based on the suspended solids concentration and the DAF trial result, so there is no single figure that fits every plant. The flocculant is usually prepared as a dilute solution and added at a point where it can mix gently with the effluent before the air injection. Too much shear can break the floc before it reaches the surface. The dose is confirmed on a DAF trial, not from a catalogue figure.
Standard industrial packing is used, with pack sizes on request. Store in a dry, ventilated area away from direct sunlight and moisture. Keep containers sealed until use and reseal opened containers, because Assam's humidity can cause the powder to absorb moisture and cake.
Our team helps plant engineers in Assam match the flotation flocculant to the effluent type and the DAF system design. Selection support is provided by phone and shared data; final specification is confirmed after a DAF trial on your own system.
Which industries in Assam use flotation flocculants? Textile dyeing, paper mills, rubber processing, water treatment and oil and gas operations.
Flotation vs settling? Settling flocs sink; flotation flocs attach to air bubbles and rise. The flocculant is designed for the specific removal mechanism.
What is the flocculant's role in DAF? It builds flocs large enough and buoyant enough to attach to the air bubbles and survive the DAF turbulence.
How is dosage determined? By a jar test followed by a DAF trial on the actual effluent; there is no single figure.
To discuss flotation flocculant selection for your DAF system in Assam, call +91-9312871070.
Related reading: flocculant for effluent treatment and sludge dewatering and polyelectrolytes for coagulation and flocculation if your plant uses both settling and flotation.
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