Low-Sludge BWD-01 Water Decoloring Agent for Apparel Wet Processing Wastewater in Sri Lanka

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.

Textile Wastewater Problem in Sri Lanka

The central treatment problem is that 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 dose, 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.

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.

Technical Specifications

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.

Recommended Application Scenarios

• Apparel wet-processing ETPs seeking lower mineral sludge contribution.
• Mixed-fiber dyeing wastewater containing reactive, acid and disperse dyes.
• Color-polishing before advanced treatment or selected water-reuse processes.

How BWD-01 Works

1. Charge neutralization: cationic groups interact with negatively charged reactive, acid and disperse dyes across mixed apparel materials and colored colloids.
2. Destabilization: reduced electrostatic repulsion allows dissolved or finely dispersed color bodies to associate.
3. Floc formation: the destabilized contaminants form visible aggregates; PAC may strengthen or densify flocs where testing supports it.
4. Solid-liquid separation: the resulting flocs are removed by sedimentation or air flotation, producing clearer treated water.

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.

Recommended Application Procedure

1. Collect a representative wastewater sample after appropriate screening and equalization.
2. Prepare several BWD-01 working solutions by diluting the product with 10 to 40 times clean water.
3. Use pH 7.5-8.0 as the TDS starting range for improved performance, then test nearby values if necessary.
4. Dose BWD-01 into the wastewater and mix thoroughly for several minutes.
5. Where color and CODcr remain high, test PAC before and after BWD-01 in separate beakers. Do not premix the chemicals.
6. Allow the flocs to settle or evaluate them by dissolved-air flotation, matching the site's full-scale process.
7. Compare final color, CODcr, turbidity, floc strength, separation time, sludge volume and total treatment cost before scale-up.

Expected Treatment Results

The BWD-01 TDS reports typical decolorization of approximately 50%-99% and CODcr reduction of approximately 50%-80% in suitable applications. These are reference ranges, not guaranteed results. 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. The comparison should use dry solids, dewatering behavior and disposal cost where sludge reduction is a project objective.

Bluwat Manufacturing Advantages

• Manufacturer since 2000 with more than 25 years of water-treatment chemical production and export experience.
• Three production bases supporting stable supply, batch control and multiple packaging options.
• Products exported to more than 80 countries and used by over 5,000 industrial customers.
• Quality and environmental systems including ISO 9001 and ISO 14001, with ZDHC-conformant BWD product support.
• Routine control of appearance, solid content, specific gravity, pH, viscosity and solubility, supported by batch COA.
• Free sample availability and technical support for jar-test design, dosage comparison and full-scale trial planning.
• Standard BWD-01 packaging in 30 kg and 250 kg plastic drums or 1250 kg IBC containers.

For Asian textile markets, Bluwat supports drum and IBC shipments, production planning for regular consumption, and remote jar-test review using the customer's wastewater data and treatment photographs.

Frequently Asked Questions