CDI vs Reverse Osmosis vs EDI: Which Water Purification Technology is Right for You?

Introduction

Selecting the right water purification technology is one of the most critical decisions for industries ranging from semiconductors and pharmaceuticals to food and beverage manufacturing. Three technologies dominate the landscape: Capacitive Deionisation (CDI), Reverse Osmosis (RO), and Electrodeionisation (EDI). Each offers distinct advantages, constraints, and economic profiles that make them suitable for different applications and budgets.

This comprehensive guide compares these three water purification technologies across multiple dimensions, helping engineers, procurement professionals, and facility managers make data-driven decisions aligned with their operational requirements, environmental goals, and financial constraints.