Maintenance methods for hollow fiber ultrafiltration membranes

Hollow fiber ultrafiltration membranes are a type of ultrafiltration membrane. It is one of the most mature and advanced ultrafiltration technologies. The walls of hollow fiber tubes are covered with micropores, with pore sizes designed to retain substances with relatively large molecular weights, ranging from several thousand to hundreds of thousands.

1. Raw water is treated with a bactericide to kill bacteria and microorganisms. An appropriate residual chlorine level is maintained.

2. Pre-filtration removes suspended solids. When the colloid content is high, flocculation and sedimentation pretreatment is used.

3. Timed backwashing and rapid rinsing, along with periodic chemical rinsing.

4. Dynamic filtration, discharging concentrated water; the recovery ratio depends on the raw water quality.

5. Slow pressure increases and decreases to prevent shock.