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Cotton reactive-dye wastewater
Cotton yarn and fabric dyeing effluent containing soluble unfixed reactive dyes.
Bluwat BWD-01 Water Decoloring Agent
BWD-01 for Cotton, Alpaca and Wool Textile Wastewater Treatment in Peru
A jar-test-driven organic decolorant program for reactive cotton dyes, acid dyes used on animal fibers, mixed specialty-textile effluent and final color polishing before discharge or reuse treatment.
50% min Solid content
pH 7.5-8.0 Recommended starting range
30 / 250 / 1250 kg Standard packaging options
Product Overview
One treatment plant can receive very different dye systems
Textile wet processing in Peru 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 cotton dyes and acid dyes used on alpaca, wool and other animal fibers. 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 Peru
Cotton and animal-fiber lines create different chemical demand
The central treatment problem is that cotton and animal-fiber lines introduce very different soluble dye systems to the same treatment plant. 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.
BWD-01 Treatment Solution
Create separate BWD-01 jar-test ranges for cotton and alpaca or wool, then verify the combined equalized stream. 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.
Why the Problem Occurs
- Reactive dyes used on cotton remain soluble when unfixed.
- Acid dyes used on alpaca or wool also require targeted charge neutralization.
- Specialty batches can create concentrated color despite moderate total flow.
Technical Specifications
BWD-01 product data
| 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
Where BWD-01 can be evaluated
Alpaca and wool acid-dye effluent
Colored wastewater from animal-fiber dyeing, rinsing and specialty finishing operations.
Mixed specialty-textile wastewater
Equalized wastewater requiring final color removal before discharge or tertiary treatment.
How BWD-01 Works
Four stages from charge neutralization to separation
Charge neutralization
Cationic groups interact with negatively charged reactive cotton dyes, acid dyes used on animal fibers and colored colloids.
Destabilization
Reduced electrostatic repulsion allows dissolved or finely dispersed color bodies to associate.
Floc formation
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 dissolved-air flotation to produce clearer treated water.
How to Choose and Test BWD-01
Separate the source streams before confirming the composite
Test source streams first
Do not combine cotton and animal-fiber samples in the first test.
Record production details
Document dye class and shade depth for specialty batches.
Compare PAC order
Evaluate PAC before and after BWD-01 for both fiber groups.
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
Seven-step jar-test and scale-up workflow
1
Collect the sample
Collect representative wastewater after appropriate screening and equalization.
2
Prepare working solutions
Dilute BWD-01 with 10 to 40 times clean water and prepare several test concentrations.
3
Adjust the starting pH
Use pH 7.5-8.0 as the TDS starting range, then test nearby values where necessary.
4
Dose and mix
Add BWD-01 to the wastewater and mix thoroughly for several minutes.
5
Compare PAC sequence
Test PAC before and after BWD-01 in separate beakers. Do not premix the chemicals.
6
Evaluate separation
Allow flocs to settle or evaluate them by DAF, matching the site's full-scale process.
7
Compare total performance
Review final color, CODcr, turbidity, floc strength, separation time, sludge volume and treatment cost.
Expected Treatment Results
Reference performance ranges from the BWD-01 TDS
50%-99% Typical decolorization reference range
Actual removal depends on dye class, concentration, auxiliaries, pH, mixing, chemical sequence and separation equipment.
50%-80% Typical CODcr reduction reference range
These values are indicative for suitable applications and are not guaranteed operating results.
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 rather than wet sludge volume alone.
Bluwat Manufacturing Advantages
Manufacturing, documentation and application support
25+ years of manufacturing experience
Manufacturer since 2000 with long-term water-treatment chemical production and export experience.
Three production bases
Multiple production sites support stable supply, batch control and flexible packaging options.
Global application experience
Products exported to more than 80 countries and used by over 5,000 industrial customers.
Quality and environmental systems
ISO 9001 and ISO 14001 systems with ZDHC-conformant BWD product support.
Routine batch quality control
Appearance, solid content, specific gravity, pH, viscosity and solubility are supported by batch COA.
Jar-test technical support
Free samples and support for dosage comparison, chemical sequence and full-scale trial planning.
Flexible packaging
Standard BWD-01 supply in 30 kg and 250 kg plastic drums or 1250 kg IBC containers.
Americas supply support
Sample evaluation, container-load planning, stable batch specifications and technical communication for distributors, textile groups and individual mills.
Frequently Asked Questions
Practical BWD-01 questions for Peruvian textile mills
Can BWD-01 treat both cotton and alpaca dyeing wastewater?
Both reactive and acid dyes are listed application classes, but separate starting doses are recommended because the dye and auxiliary systems differ.
Why test the combined equalized stream after source testing?
Source tests identify the demand of each wastewater type, while the composite test confirms the actual full-scale condition and possible interactions between the two streams.
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 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.