Cleaning Spiral Wound Membranes Technical Guide - Avista™
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Cleaner Technical Guide

All reverse osmosis (RO) systems foul over time. Symptoms of fouling include a decrease in normalized permeate flow, an increase in salt passage, or an increase in differential pressure. Severe fouling may also cause irreversible damage to membranes, making effective cleanings difficult or impossible. Industry guidelines suggest cleaning when one or more of the following events occur:

  • Normalized flux decreases by 10 to 15 percent
  • Salt passages increases by 10 percent
  • Differential pressure increases by 10 to 15 percent

This bulletin describes procedures and products that can help plant operators conduct more effective cleanings and achieve more cost-effective system operation.

Download our Cleaner Technical Guide to learn more about best practices to keep RO systems operating at optimal conditions.

Cleaner Technical Guide
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