Membrane protection
SDI must be held below 3 consistently; a single excursion can foul a membrane train irrecoverably.
Infrastructure · Industry
Intake screening, membrane pre-treatment and effluent polishing from municipal plants to industrial zero-liquid-discharge trains.
- Delivered to membrane inlet
- SDI < 3
- Largest commissioned train
- 3,500 m³/h
- Filtrate turbidity
- < 1 NTU
The constraint
Membranes protected, discharge limits met.
Membranes are the most expensive component in modern water treatment and the most sensitive to what reaches them. Pre-treatment failure is not a filtration problem — it is a membrane replacement invoice.
Standards we work to
- ISO 24512
- NSF/ANSI 61
- WRAS
- EN 13443
- ASTM D4189
Seasonal raw water variability
Turbidity, organic load and biology swing dramatically with rainfall and season, so design must cover the worst month.
Biofouling control
Biological growth on screens and membranes needs designed-in cleaning frequency rather than reactive chemical dosing.
Tightening discharge limits
Suspended solids and micro-plastic limits continue to fall, forcing polishing stages onto plants built without them.
Applications
Where we filter in water & wastewater
- 01Seawater and brackish RO pre-treatment
- 02Municipal potable water polishing
- 03Industrial effluent treatment before discharge
- 04Zero liquid discharge concentrate handling
- 05Cooling tower make-up and side-stream filtration
- 06Water reuse and reclamation trains
Recommended platforms
What we typically specify here
Proof
Water & Wastewater case studies
Next step
Send us your water & wastewater stream data.
Our applications engineers work to the standards listed above every week. You will not be explaining your industry from first principles.
Or call +91 79 4890 2200 · sales@worldasatech.com