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Reactive and Pigment Textile Printing Wastewater
Suitable for mixed printing effluent containing dissolved reactive color, pigments, binders and fine suspended solids.
Bluwat BWD-01 Water Decoloring Agent
Textile Printing Wastewater Treatment in Spain
A cationic decoloring solution for reactive, direct and pigment-printing color systems, designed to control concentrated cleaning peaks, strengthen floc formation and improve separation in Spanish textile treatment plants.
50% minSolid content
pH 7.5-8.0Recommended starting range
30 / 250 / 1250 kgStandard packaging options
01
Product Overview
Textile wet processing in Spain 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, direct and pigment-printing color systems.
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 Spain
Cleaning water and mixed print recipes create concentrated color peaks and slow-settling fine solids.
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
Printing-machine cleaning releases color and binder within a short time.
Reactive-printing residues remain dissolved while pigments behave as fine particles.
Seasonal design changes alter the color and auxiliary profile.
03
BWD-01 Treatment Solution
Equalize concentrated cleaning flows and use BWD-01 to treat both dissolved and colloidal color under a jar-tested PAC sequence.
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
Printing-Screen and Machine Wash Water
Can support treatment of short-duration cleaning discharges with concentrated dye, pigment and binder loading.
Combined Dyeing and Finishing Effluent
Can be evaluated for mixed dyeing and finishing wastewater where visible residual color remains after general clarification.
06
How BWD-01 Works
Cationic groups interact with negatively charged reactive, direct and pigment-printing color systems 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
Sample the concentrated printing-machine cleaning peak as well as the equalized tank.
Check binder-related turbidity after the main color-removal step.
Choose the PAC dosing order according to floc strength, separation speed and sludge volume.
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 European textile customers, Bluwat can support batch documentation, COA review, SDS and TDS packages, IBC supply planning, and technical comparison against the plant's current coagulant program.
11
Frequently Asked Questions
Why should concentrated print-cleaning water be equalized?
A short cleaning discharge can carry a disproportionate amount of dye and binder. Equalization makes the chemical demand more predictable and protects the separator from a sudden color and solids load.
Can BWD-01 treat both reactive printing and pigment printing?
It can be screened for both, but the mechanism and optimum dosage can differ. Reactive color is often dissolved, while pigment systems also require effective particle and binder removal.
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.