Application / lab test
Drawing Oil Wastewater: Demulsification Jar Test
Drawing-oil wastewater can stay milky when lubricant droplets are held in a stable emulsion. This Short places a working sample beside a treated beaker and shows a staged screen: demulsifier, pH adjustment and then PAM. Visible flocs and a separate liquid phase make it worth investigating, but the practical question is whether the same route works across the drawing line’s real water variations and separation equipment. Use a representative sample, keep an untreated control, and compare oil-and-grease or suspended-solids measurements alongside floc behavior. VCYCLETECH lists PAM grades for the polymer step; a suitable demulsifier identity and operating condition require a sample-specific discussion.
Watch on YouTube Published
What this video shows
For drawing-oil wastewater, begin with the actual used-lubricant stream and compare an untreated sample with a demulsifier-led sequence. The video shows pH adjustment and PAM after the first stage, followed by visible flocs and liquid separation. Match the next trial to the plant’s skimmer, flotation unit or settling equipment, and measure the outcome rather than choosing from beaker appearance alone.
Start with the drawing-oil sample
Drawing oils can arrive with surfactants, metal fines and cleaners. Collect water from the point where treatment will begin, and note the oil or lubricant family, dilution history, pH and temperature. Keep an untreated beaker beside each candidate so the change in droplet stability and solids separation is easy to see.
Follow the visible treatment sequence
The clip labels a demulsifier first, pH adjustment next and PAM last. The right-hand beaker develops visible oil-rich flocs and a separate liquid phase. That is a useful screening response, but the choice for a plant depends on where those solids go: skimming, dissolved-air flotation, settling or filtration.
Choose the next experiment
Compare the untreated sample with the first-stage treatment alone, then add candidate PAM grades only after the emulsion has been conditioned. Record mixing, settling or flotation, sludge volume and measured oil-and-grease or turbidity using the site’s method. If the wastewater changes between drawing lines or cleaning cycles, repeat the comparison on those streams.
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 and drawing-oil wastewater | Video title |
| Shown sequence | Demulsifier, pH adjustment, PAM | Video captions |
| Visible outcome | Flocs and a separate liquid phase in the treated beaker | Video frames |
| PAM catalog forms | Anionic, cationic and nonionic powder grades | PAM product page |
| PAM catalog solids | ≥90% | PAM product page |
| Primary separation choice | Match skimming, flotation, settling or filtration to the plant | Buyer process input |
What to compare in a drawing-oil jar test
The useful comparison is between controlled conditions on the same wastewater, not between unrelated video samples.
| Beaker or trial | Question it answers | Useful observation |
|---|---|---|
| Untreated drawing-oil sample | How stable is the starting emulsion? | Oil layer, turbidity and solids |
| First-stage treatment | Does the emulsion respond? | Droplet release and pH response |
| First stage plus PAM | Can conditioned material form removable flocs? | Floc size, rise or settling, carryover |
| Plant separator trial | Can the real equipment capture it? | Measured oil and solids, sludge handling |
From drawing-oil sample to separation trial
What helps match a drawing-oil sample?
The oil formulation and separator decide which chemistry deserves a closer look.
- Lubricant or drawing-oil family and cleaning chemicals
- Sample point, pH, temperature and production variation
- Measured oil and grease, turbidity or suspended solids
- Skimmer, flotation, settling or filtration equipment
- Desired treatment outcome and sample availability
Common questions
What wastewater is shown?
The video title identifies heavy metalworking and drawing-oil wastewater; the clip shows a side-by-side beaker treatment.
What is the visible order of addition?
The on-screen explanation presents demulsifier first, pH adjustment next and PAM afterward.
Is PAM the emulsion breaker?
PAM is the polymer-flocculation step shown after the initial conditioning; the first-stage treatment targets emulsion stability.
Which result should be measured?
Use the plant’s oil-and-grease and solids or turbidity methods, plus separator and sludge observations.
What should I send for a sample discussion?
Share the drawing-oil source, current water data, treatment target, separator and a representative sample.