Mexico Metal Processing Wastewater Treatment | Emulsified Oil Removal Solution
π Case Study: Mexico Metal Processing Plant
π Background
A metal processing factory in Mexico generates wastewater containing high levels of emulsified cutting oil and lubricantsfrom CNC mAchining and surface finishing processes.
Main Challenges:
- Stable Oil-Water Emulsion (difficult to separate)
- High turbidity and COD
- Poor settling performance
- Conventional treatment ineffective
βοΈ Treatment Solution (Jar Test)
Based on laboratory testing, an optimized 3-step chemical treatment was applied:
Step 1: Add Demulsifier
- Breaks the stable Oil-Water Emulsion
- Releases dispersed oil droplets
Step 2: Adjust pH to 7β8
- Creates optimal conditions for coagulation & flocculation
Step 3: Add PAM Flocculant
- Aggregates oil and suspended solids
- Forms large, fast-settling flocs
π Process Flow Diagram
β
Add Demulsifier
β
Rapid Mixing
β
pH Adjustment (7β8)
β
Add Pam Flocculant
β
Floc Formation & Settling
β
Clear Water Output
π Performance Data (Lab Simulation)
| Parameter | Before Treatment | After Treatment |
|---|---|---|
| Appearance | Milky / Oily | Clear |
| Turbidity | High | Low |
| Oil Content | High | Significantly Reduced |
| COD | ~2500 mg/L | ~500 mg/L |
| Settling Speed | Very Slow | Rapid |
π Visual Result:
Clear phase separation with visible sludge flocs and clarified supernatant.
π― Key Results
- β Rapid emulsion breaking
- β Efficient oil removal
- β Significant COD reduction
- β Improved settling performance
- β Easy integration into existing systems
π§ͺ Why This Solution Works
- Demulsifier destabilizes emulsified oil systems
- PAM enhances particle bridging and floc growth
- pH optimization ensures maximum reaction efficiency
This combination is highly effective for mAchining coolant wastewater and similar industrial oily water.
π Application Industries
- Metal processing / CNC mAchining
- Automotive manufacturing
- Steel & rolling mills
- Mechanical workshops
- Equipment maintenance facilities
β FAQ Section
This solution is ideal for wastewater containing emulsified oil, especially from metal processing and mAchining industries.
Emulsified oil is chemically stable. Demulsifier breaks this structure, allowing oil to separate and be removed effectively.
No. PAM works best after Demulsification. Without breaking the emulsion, flocculation efficiency will be limited.
Typically pH 7β8 provides optimal conditions, but it may vary depending on wastewater composition.
Yes. This jar test represents a scalable solution suitable for DAF systems, sedimentation tanks, and integrated treatment plants.
π’ About Bluwat Chemicals
Bluwat Chemicals is a professional manufacturer of water Treatment Chemicals with over 25 years of experience.
We provide:
- Customized treatment solutions
- Laboratory testing with real wastewater
- Stable product quality and global supply