The AWWA M55 manual provides comprehensive guidance on designing, operating, and maintaining membrane filtration systems for water and wastewater treatment. Produced by the American Water Works Association (AWWA), M55 synthesizes industry best practices, performance data, and recommendations for selecting membrane types (microfiltration, ultrafiltration, nanofiltration, and reverse osmosis), pretreatment needs, fouling control, cleaning protocols, monitoring, and pilot testing. It is widely used by engineers, operators, and plant managers to inform capital decisions, regulatory compliance, and long-term reliability planning.
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