Case Study: Turkey Textile Finishing Factory
Background
A textile finishing factory in Turkey generates wastewater containing softeners, lubricants, and surfactants, resulting in a stable oily emulsion system.
Main Issues:
- Milky and highly turbid water
- Oil and chemicals difficult to separate
- High COD and organic load
- Poor sedimentation performance
Conventional coagulation alone showed limited effectiveness.
Treatment Solution (Jar Test)
Based on lab testing, a 3-step chemical treatment was optimized:
Step 1: Add Demulsifier
- Breaks emulsion formed by surfactants and oils
- Releases dispersed oil droplets
Step 2: Adjust pH to 7–8
- Stabilizes reaction conditions
- Enhances coagulation efficiency
Step 3: Add PAM Flocculant
- Aggregates oil, dyes, and suspended solids
- Forms dense flocs for rapid settling
Process Flow Diagram
Textile Oily Wastewater
↓
Add Demulsifier
↓
Rapid Mixing
↓
pH Adjustment (7–8)
↓
Add PAM Flocculant
↓
Floc Formation & Settling
↓
Clarified Water
Performance Data (Lab Simulation)
| Parameter |
Before Treatment |
After Treatment |
| Appearance |
Milky / Oily |
Clear / Light Transparent |
| Turbidity |
Very High |
Low |
| Oil Content |
High |
Significantly Reduced |
| COD |
~3000 mg/L |
~700 mg/L |
| Settling Speed |
Slow |
Fast |
Observation:
Clear separation between sludge and water phase with visible floc formation.
Key Results
- Effective removal of emulsified oil and auxiliaries
- Significant turbidity and COD reduction
- Improved sedimentation efficiency
- Compatible with existing textile wastewater systems
Technical Insight
Textile wastewater contains surfactants and finishing agents, which stabilize emulsified oil.
- Demulsifier disrupts this stability
- PAM enhances bridging and floc growth
- pH optimization ensures best reaction performance
Application Scope
- Textile dyeing & finishing plants
- Fabric washing processes
- Garment processing wastewater
- Industrial laundry wastewater
FAQ Section
1. Why is textile wastewater difficult to treat?
Because it contains surfactants and emulsified oils, which form stable systems that resist separation.
2. Can this solution remove dyes as well?
Yes. The combination of demulsifier and PAM can also help remove color and suspended dye particles.
3. Is pH adjustment necessary?
Yes. Maintaining pH 7–8 improves both demulsification and flocculation efficiency.
4. Can this be applied in existing treatment plants?
Yes. It can be integrated into coagulation, flotation (DAF), or sedimentation systems.
5. How to select the right chemical dosage?
Jar testing is recommended to determine the optimal dosage based on wastewater characteristics.
About Bluwat Chemicals
Bluwat Chemicals is a professional manufacturer of water treatment chemicals with over 25 years of experience.
We provide:
- Customized wastewater treatment solutions
- Laboratory testing with real samples
- Stable product supply worldwide
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