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Apparel Wet-Processing ETPs
Suitable for facilities seeking dependable color removal with a lower mineral-sludge contribution.
Bluwat BWD-01 Water Decoloring Agent
Textile Wastewater Treatment in Sri Lanka
An organic cationic decoloring solution for mixed-fiber apparel wastewater, designed to support strong color removal, controlled sludge production and stable pretreatment before advanced treatment or selected water-reuse processes.
50% minSolid content
pH 7.5-8.0Recommended starting range
30 / 250 / 1250 kgStandard packaging options
01
Product Overview
Textile wet processing in Sri Lanka does not create one uniform wastewater. Fiber type, dye class, shade depth, washing recipe and finishing chemistry can change the color and charge demand from one production batch to the next.
BWD-01 supplies strong cationic charge to destabilize negatively charged soluble dyes and fine color-bearing particles. It is especially relevant to reactive, acid and disperse dyes across mixed apparel materials.
The objective is not merely to make the sample look clearer, but to produce flocs that can be separated reliably by sedimentation or dissolved-air flotation.
02
Textile Wastewater Problem in Sri Lanka
Plants need dependable color removal without adding unnecessary inorganic sludge to an already optimized treatment system.
Conventional inorganic coagulation may remove suspended solids but leave a visible soluble-color fraction. Operators may then increase coagulant dosage, creating more sludge without proportional color improvement.
Why the Problem Occurs
Multiple fiber types introduce dyes with different charge and solubility.
High inorganic-coagulant dosage can increase sludge handling and dewatering requirements.
Water-reuse targets require attention to residual color, turbidity and downstream process stability.
03
BWD-01 Treatment Solution
Screen BWD-01 as an organic decolorant that may reduce dependence on inorganic coagulants while maintaining strong color and flocculation performance.
The selected program should be based on actual wastewater rather than a universal dose. A controlled jar test identifies the point where charge neutralization, floc formation, separation speed and sludge production are balanced.
PAC can be tested before or after BWD-01, but the two products must be prepared and dosed separately.
04
Technical Specifications
| Property | BWD-01 Specification |
|---|---|
| Chemical Name | Quaternary ammonium cationic polymer |
| Appearance | Colorless to yellowish translucent liquid |
| Solid Content | 50% min |
| Specific Gravity at 20 C | 1.1-1.3 |
| pH Value, 30% Solution | 3-6 |
| Viscosity at 25 C | 30-300 cps |
| Solubility | Soluble with water at any rate |
| Storage Temperature | 0-35 C |
| Standard Package | 30 kg or 250 kg plastic drum; 1250 kg IBC |
Technical note: Values are based on the Bluwat BWD-01 TDS. Confirm the supplied batch with its Certificate of Analysis and consult the SDS for handling and shelf-life details.
05
Recommended Application Scenarios
Mixed-Fiber Dyeing Wastewater
Can be evaluated for reactive, acid and disperse dyes generated by different apparel materials.
Color Polishing Before Reuse
Can support pretreatment before advanced oxidation, membrane treatment or selected water-reuse processes.
06
How BWD-01 Works
Cationic groups interact with negatively charged reactive, acid and disperse dyes across mixed apparel materials and colored colloids.
Reduced electrostatic repulsion allows dissolved or finely dispersed color bodies to associate.
Destabilized contaminants form visible aggregates; PAC may strengthen or densify the flocs where testing supports it.
The resulting flocs are removed by sedimentation or air flotation, producing clearer treated water.
07
How to Choose and Test BWD-01
Compare dry sludge mass and dewatering behavior, not only wet sludge volume.
Check residual color before downstream membranes or oxidation stages.
Use PAC only where the jar test shows a clear technical or cost benefit.
Use untreated and current-treatment controls in every jar-test series. Record raw-water pH, true or apparent color, CODcr, turbidity, temperature and production source. Photographs are useful, but analytical results and sludge behavior are required for a defensible selection.
08
Recommended Application Procedure
Collect representative wastewaterTake the sample after appropriate screening and equalization.
Prepare BWD-01 working solutionsDilute the product with 10 to 40 times clean water.
Screen wastewater pHUse pH 7.5-8.0 as the TDS starting range, then test nearby values if necessary.
Dose BWD-01Add it to the wastewater and mix thoroughly for several minutes.
Test PAC sequenceWhere color and CODcr remain high, test PAC before and after BWD-01 in separate beakers. Do not premix the chemicals.
Evaluate separationAllow flocs to settle or evaluate them by dissolved-air flotation, matching the full-scale process.
Compare final performanceReview color, CODcr, turbidity, floc strength, separation time, sludge volume and total treatment cost before scale-up.
09
Expected Treatment Results
The BWD-01 TDS reports typical performance ranges in suitable applications. These are reference values rather than guaranteed results.
50%-99% Typical decolorization reference range
50%-80% Typical CODcr reduction reference range
Actual performance depends on dye class, concentration, auxiliaries, pH, mixing, chemical sequence and separation equipment.
Compared with a high-dose inorganic-only program, BWD-01 may provide faster flocculation and settling and may reduce the inorganic contribution to sludge. Where sludge reduction is a project objective, compare dry solids, dewatering behavior and disposal cost.
10
Bluwat Manufacturing Advantages
Manufacturer since 2000 with 25+ years of production and export experience
Three production bases supporting stable supply and batch control
Products exported to 80+ countries
Used by 5,000+ industrial customers
ISO 9001 management systems
ZDHC-conformant BWD product support
Routine quality control supported by batch COA
Free samples and jar-test support
30 kg, 250 kg drum and 1250 kg IBC packaging
For Asian textile markets, Bluwat supports drum and IBC shipments, production planning for regular consumption, and remote jar-test review using customer wastewater data and treatment photographs.
11
Frequently Asked Questions
Why is BWD-01 described as a low-sludge option?
As an organic polymer, it may reduce the amount of inorganic solid introduced compared with high-dose mineral coagulants. Actual sludge reduction must be confirmed using the plant's own water and dewatering process.
Can BWD-01 be used before water-reuse treatment?
It can be evaluated as a pretreatment color-removal step. Reuse suitability also depends on salts, dissolved organics, hardness and other parameters that BWD-01 is not designed to remove.
What is the recommended BWD-01 dilution and wastewater pH?
The TDS recommends dilution with 10 to 40 times water and identifies wastewater pH 7.5-8.0 as a useful starting range. Final dilution, pH and dose must be confirmed using the actual effluent.
Can BWD-01 be mixed directly with polyaluminum chloride?
No. BWD-01 and PAC should be prepared and dosed separately. PAC may be added before or after BWD-01 depending on the flocculation test and treatment process, but the concentrates should not be premixed.
How should the final BWD-01 dosage be selected?
Use a jar test with representative wastewater. Compare color, CODcr, turbidity, floc size, separation time and sludge volume. The best operating dose is the lowest stable dose that meets the plant's complete treatment objective.