ORINS Membrane-BS
BS Alkali-resistant Nanofiltration Element
BS supports caustic purification, recovery, concentration, impurity control and fractionation in high-pH feeds.
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PRODUCT OVERVIEW
Characteristics
The BS alkali-resistant NF element supports caustic purification, recovery, concentration and fractionation in high-pH feeds.
- Reference MWCO 200 Da
- Reference flux 30 LMH with 96% MgSO4 and glucose rejection
- Reference caustic feeds include 20% NaOH and 10% KOH
- Operating pH 3–14 and cleaning pH 2–14
TECHNICAL DATA
Specifications and operating conditions
| Element | Material | Active area | Reference flow / flux | MWCO | Feed spacer | Application focus |
|---|---|---|---|---|---|---|
| BS-8040 | Alkali-resistant composite membrane | 28 m² (31 mil)/ 23 m² (46 mil)/ 27 m² (34 mil) | 30 LMH | 200 Da | 31 / 34 / 46 mil | Caustic purification, recovery and mother liquor concentration |
Reference data uses 2000 ppm MgSO4 or 5% glucose at 15.5 bar, 30°C and pH 7; flux may vary by approximately ±20%.
Published operating limits
- Maximum pressure
- 40 bar
- Maximum pressure drop
- 1 bar
- Operating/cleaning temperature
- ≤ 50°C
- Operating pH
- 3–14
- Cleaning pH
- 2–14
- Pressure ramp
- < 0.7 bar/s
Reference values and maximum limits do not establish a combined operating condition for every feed. Confirm selection and operating conditions for the actual duty.
APPLICATIONS
Typical applications
- Caustic purification and reuse
- Alkaline mother liquor concentration
- High-pH process fractionation
- Alkaline waste reduction
SELECTION
Validate with your feed
Validation should cover alkali type, concentration, temperature, salinity and organics.
Testing & scale-upOPERATION
Operating guidance
Remove oxidants
Remove free chlorine and oxidants; use softened or RO water for cleaning.
Confirm high-caustic limits
Validate higher concentration, temperature or extended caustic operation before scale-up.
Store wet and sealed
Do not dry the element; store sealed at 4–30°C with a suitable preservative.