Decolorant for Textile Effluent — SunDec SC05
SunDec SC05 is our own Sun Brand decolorant polymer — a dicyandiamide resin manufactured by Suraj Chemicals for colour removal from textile and other dye-bearing wastewater. Supplied as a colourless to yellow liquid in drums, with a spec sheet and MSDS.
What is a decolorant polymer?
Dyes that are not fixed on the fabric leave the dyehouse in the wastewater, and many of them — reactive, acid and direct dyes in particular — stay dissolved and pass straight through ordinary coagulation, leaving the treated effluent coloured.
A decolorant polymer such as SunDec is a cationic, dicyandiamide-based resin. Its positive charge combines with the negatively charged dye molecules to form insoluble complexes, which are then removed with the floc in the clarifier. It is usually used together with a coagulant such as SunPac PAC and a flocculant such as SunFloc.
SunDec grade
SunDec SC05
Colourless to yellow liquid. Proprietary polymer blend.
| pH on Solution | 3.0 – 6.0 |
| LVT Brookfield Viscosity (cP) (LV1, 30 rpm) | 10 – 400 |
| Non-Volatile Solids (%) | 48.0 – 52.0 |
| Generic Name | Dicyandiamide resin |
| Material Description | Colourless to yellow liquid |
| Packaging | Drums |
| Shelf Life | 24 months |
SunDec SC05 specification
| Parameter | SunDec SC05 |
|---|---|
| pH on Solution | 3.0 – 6.0 |
| LVT Brookfield Viscosity (cP) (LV1, 30 rpm) | 10 – 400 |
| Non-Volatile Solids (%) | 48.0 – 52.0 |
| Generic Name | Dicyandiamide resin |
| Material Description | Colourless to yellow liquid |
| Packaging | Drums |
| Shelf Life | 24 months |
Values from the SunDec SC05 specification sheet.
Where SunDec is used
Textile dyeing & printing
Colour removal in effluent from dyeing, printing and processing units.
Other dye-bearing wastewater
Decolourising treatment in similar coloured industrial effluents.
With coagulant + flocculant
As part of a primary treatment sequence alongside PAC or alum and a polyelectrolyte.
Effluent compliance
Helping reduce colour in treated effluent before discharge or further treatment.
Dosing and trials
Dose, dosing point and pH depend on the dyes and the effluent. Run a jar test on your own effluent first — we can help you plan the trial.
Read more: Textile effluent treatment chemicals and Chemicals used in textile dyeing.
Frequently asked questions
What is a decolorant used for in textile effluent?
A decolorant removes dissolved dye colour from wastewater. It reacts with the dye molecules to form insoluble particles that are then settled out with the floc in the clarifier.
What is SunDec SC05 made of?
SunDec SC05 is a dicyandiamide resin, supplied as a colourless to yellow liquid with 48.0 – 52.0% non-volatile solids.
Is a decolorant used alone?
Usually not. It is normally used with a coagulant such as PAC or alum and a polyelectrolyte flocculant. A jar test sets the best order and dose.
How is SunDec packed and how long does it keep?
SunDec SC05 is supplied in drums and has a shelf life of 24 months per the specification sheet.
Who manufactures SunDec?
SunDec is manufactured by Suraj Chemicals, Chennai, and sold under our own trademarked Sun Brand.