Module and Feed Spacer Design Considerations for Applications Using Spiral Wound Polyamide Membranes

摘要

Functions of the RO Feed Spacer: 1. Maintain an open channel. Promote mixing to move rejected species away from the membrane. Performance Tradeoff: 2. Feed-side pressure drop is an unavoidable byproduct of mixing. 3. Lower pressure drop usually means increased polarization (reduced mixing) at the membrane surface.