Why a Softener and an RO Unit Perform Different Jobs

Author: HZM Machinery Views: 549

A softener exchanges hardness ions; an RO membrane separates water into permeate and concentrate while rejecting dissolved constituents to a degree that depends on the membrane and conditions. Softening is not equivalent to desalination, and neither operation alone establishes every finished-water requirement.

 The Role of Reverse Osmosis and Water Softener In A Water Treatment System

Assign the pretreatment duty

Use hardness, alkalinity and other feed-water results to evaluate scaling control. A softener may form part of that design, but its service capacity and regeneration schedule must fit the feed flow. Check hardness downstream rather than assuming regeneration restored performance.

Check the RO separately

Measure feed, permeate and concentrate flows and relevant water-quality indicators. Evaluate performance changes against operating conditions. Increasing pressure is not a substitute for diagnosing exhausted pretreatment or membrane fouling.

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