Industrial water guide

Membrane Filtration Overview

Microfiltration, ultrafiltration, nanofiltration and reverse osmosis as selective barriers.

Water-system note: treatment requirements depend on source water, intended use, equipment, permits and local rules. Real systems require qualified design, operation and laboratory verification.

What this topic covers

Microfiltration, ultrafiltration, nanofiltration and reverse osmosis as selective barriers.

Core water-treatment ideas

Membranes separate water from contaminants according to pore structure, transport mechanisms and operating conditions.

MF and UF are generally used for suspended/colloidal material and microorganisms, while NF and RO address much smaller dissolved species.

Membrane systems create a treated stream and a retained or concentrate stream.

Important limits

MF/UF and NF/RO address different size ranges and dissolved-contaminant problems.

What to monitor

Pretreatment, fouling, integrity and concentrate management are core lifecycle issues.

Lifecycle perspective

High-pressure membrane operation and cleaning require manufacturer and professional procedures.