BWD-01 Water Decoloring Agent for Denim Washing and Dyeing Wastewater in Turkey
Product Overview
Textile wet processing in Turkey 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 indigo-associated color, reactive dyes and finishing pigments. 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 Turkey
The central treatment problem is that dark blue color, fine fiber solids and washing auxiliaries can produce wastewater that settles slowly and remains visibly colored. 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
- Denim washing releases fine fibers and color-bearing particles from the fabric surface.
- Reducing agents, detergents and finishing chemicals add COD and affect floc structure.
- Different wash effects create rapid changes in color strength and solids loading.
BWD-01 Treatment Solution
Screen BWD-01 for the color-bearing fraction, while measuring suspended solids and sludge behavior so the program supports the existing DAF or clarifier.
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
|
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.
Recommended Application Scenarios
- Denim garment washing and finishing wastewater.
- Mixed denim dyeing and rinsing effluent with persistent blue color.
- Textile laundries requiring improved color polishing before discharge or reuse.
How BWD-01 Works
- Charge neutralization: cationic groups interact with negatively charged indigo-associated color, reactive dyes and finishing pigments and colored colloids.
- Destabilization: reduced electrostatic repulsion allows dissolved or finely dispersed color bodies to associate.
- Floc formation: the destabilized contaminants form visible aggregates; PAC may strengthen or densify flocs where testing supports it.
- Solid-liquid separation: the resulting flocs are removed by sedimentation or air flotation, producing clearer treated water.
How to Choose and Test BWD-01
- Measure color after removing coarse lint so chemical demand is not confused with screenable solids.
- Compare BWD-01 and PAC order because denim streams can have different particle profiles.
- Evaluate DAF float quality as well as settling when the plant uses flotation.
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
- Collect a representative wastewater sample after appropriate screening and equalization.
- Prepare several BWD-01 working solutions by diluting the product with 10 to 40 times clean water.
- Use pH 7.5-8.0 as the TDS starting range for improved performance, then test nearby values if necessary.
- Dose BWD-01 into the wastewater and mix thoroughly for several minutes.
- Where color and CODcr remain high, test PAC before and after BWD-01 in separate beakers. Do not premix the chemicals.
- Allow the flocs to settle or evaluate them by dissolved-air flotation, matching the site's full-scale process.
- 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
Will BWD-01 remove all indigo-related color from denim wastewater?
Performance depends on whether the color is dissolved, colloidal or attached to fibers. BWD-01 can improve decolorization, but screening, equalization and a jar test are necessary for a reliable process design.
Why should lint be removed before chemical treatment?
Coarse fibers consume mixing energy, disturb samples and increase sludge. Effective screening lets BWD-01 focus on fine and dissolved color that cannot be removed mechanically.
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 for better results. The final dilution, pH and dose must be confirmed with 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 the 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.