AWWA MTC69734

This powerpoint presentation presents alternatives for plant expansion, including:Expand Flocculation/Sedimentation(F/S) Basins and Add Filters;Upgrade Existing F/S Basins andExpand with Pressure Membranes; and,Upgrade Existing F/S Basins andExpand with Submerged Membranes. The Submerged Membrane alternative was selected because: it is thebest use of existinginfrastructure;lowest life-cycle costs;best planning for futureregulatory impacts; and,compatible with existingtreatment processes. Submerged membrane design, schematic layout, pretreatment-flocculation basin, pretreatment - rapid mix andscreening are presented. Important factors for submergedmembrane retrofit include:confirm depth of filter box for membrane rack;confirm space available in gallery for pipingand pumps;determine inlet channel/piping hydraulics;determine best option for backwash andCIP waste disposal; and,check compatibility of chemicals withmembranes. Membrane and filter side by sideoperating issues, solution - feed channel (short term), solutions-backwash waste sump, commissioning data, operating data, operations information after 18 months, unexpected results of adding membranes, and benefits of operating membranes andconventional filters are all presented. Includes tables, figures.

Product Details

Edition:

Vol. - No.

Published:

11/01/2009

Number of Pages:

31

File Size:

1 file , 1.8 MB