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AWWA MTC64624
- Start-up Stories: Ultrafiltration at Minneapolis Water Works
- Conference Proceeding by American Water Works Association, 03/01/2007
- Publisher: AWWA
$60.00$119.00
This slide presentation outlines the start-up experiences at two Minneapolis Water Works filtration plants, Columbia Heights and Fridley. Both have conventional pretreatment and the key ultrafiltration features of both include: Warm Water Capacity = ~ 70 mgd;Cold Water Capacity = ~ 40 mgd; 36 UF Units;UF membrane by Norit / Xflow; UF equipment by GE Ionics; and,Pressure (TMP) = 5 to 12 psid (max 15); flux adjusted by feed water temperature - Constant Flux, Units in rotating stand-by for low flow;Cleaning Methods - Water Backwash (no air),Chemically Enhanced Backwash (CEB), Dose, Soak (no recirculation); andEnhanced CEB. Topics covered include: operation of the membrane filter, preparing for start-up/operation; construction issues; membrane loading; Preservative Removal & Flushing; disinfection; testing of the control system and the membrane system; hydraulic issues; wet commissioning without membranes; membrane integrity; acceptance testing; cleaning methods; permeability; fiber breakage; and, full scale results. Includes figures.
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