Application / lab test
Metalworking Wastewater: Demulsifier, Alkali and PAM Jar Test
In this metalworking-wastewater Short, the on-screen treatment order is demulsifier, alkali for pH adjustment, then polyacrylamide (PAM). The treated beaker develops oily flocs and a clearer liquid phase. The video is most useful as a sequence guide: it helps an engineer decide which stage to vary first and what to compare before taking a condition to skimming, flotation or settling equipment. Start with the actual coolant or lubricant wastewater, keep untreated and intermediate-stage controls, and record pH, mixing and measured oil or solids. VCYCLETECH’s listed PAM family is relevant to the final flocculation step; the clip does not identify a saleable demulsifier grade.
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What this video shows
The clip demonstrates demulsifier first, alkali pH adjustment second and PAM last on a metalworking oily-wastewater sample. That order separates emulsion conditioning from polymer floc building. Compare each stage in separate beakers, then test the most promising condition with the plant’s separator and measured oil or solids targets. The linked VCYCLETECH product is PAM, not a named demulsifier formulation.
Why the order matters
The on-screen sequence begins with a demulsifier, adjusts pH with alkali and then adds polyacrylamide (PAM). The first stage targets the emulsion; the polymer is the floc-building step after conditioning. Test the order on the actual working-fluid wastewater, because the oil, surfactant and cleaner mixture determines how readily droplets separate.
Compare each beaker
Keep an untreated control, a demulsifier-only beaker, a demulsifier-plus-alkali beaker and the full sequence. Add and mix each chemical consistently, then look at floc size, liquid clarity and whether oily solids rise or settle. Use measured oil-and-grease, suspended solids or turbidity for the treatment target; visual clarity alone cannot select the final operating condition.
Move from jar to separator
A beaker has gentle mixing and a short settling path. A plant may use skimming, flotation, settling or filtration with different shear and residence times. Take the most promising laboratory condition to the real separator, check solids handling and compare fresh samples before fixing a feed strategy.
Product and process details
These fields summarize the product, process or shipment context shown in the video and linked catalog.
| Field | Value | Source |
|---|---|---|
| Sample described | Metalworking oily wastewater | Video title |
| First stage | Demulsifier | Video title and captions |
| Second stage | Alkali pH adjustment | Video captions |
| Third stage | Polyacrylamide (PAM) | Video title and captions |
| PAM catalog forms | Anionic, cationic and nonionic powder grades | PAM product page |
| PAM catalog solids | ≥90% | PAM product page |
Which addition step changes the beaker?
Hold mixing and sample conditions steady so each stage answers one practical question.
| Condition | Purpose | Compare |
|---|---|---|
| Untreated control | Set the baseline | Emulsion, pH and suspended material |
| Demulsifier only | Screen emulsion conditioning | Oil-droplet release |
| Demulsifier plus alkali | Find the effect of pH adjustment | pH and droplet or solids response |
| Full sequence with PAM | Build removable flocs | Floc integrity, liquid and solids separation |
| Separator trial | Check equipment fit | Captured oil or solids and sludge handling |
A practical addition-order screen
What should accompany a PAM grade request?
A polymer choice makes more sense when the first-stage chemistry and separation method are known.
- Coolant or lubricant type and cleaner carryover
- Starting and adjusted pH with mixing conditions
- Current emulsion-breaker identity if available
- Oil-and-grease, solids or turbidity baseline
- Separator type and desired solids handling
Common questions
What is the addition order in the Short?
The video names demulsifier, then alkali pH adjustment, then PAM.
Why add PAM after conditioning?
PAM helps the conditioned oily particles form larger flocs for separation; the first stage addresses the emulsion.
Is a fixed alkali pH target provided?
No fixed target is shown; compare pH conditions against the actual wastewater and downstream requirements.
How can I tell whether the sequence is useful?
Measure oil or solids and test whether the formed flocs can be captured by the plant’s separator.
Which VCYCLETECH product is linked?
The listed product is Polyacrylamide (PAM), with ionic grades to discuss against representative samples.