This slide presentation outlines a membrane retrofit project for an expanding small water system conventional treatment plant. The presentation outline includes:
need for water plant upgrade and
expansion; water source and treatment
challenges;
treatment alternatives analysis;
description of selected membrane
system design; and,
project status. The water source and treatment challenges include:
water source is Cosumnes River,
withdrawal allowed only in winter;
raw water storage in 3 small lakes
that support numerous aquatic plants;
lake source is low in turbidity but
has elevated total organic carbon (TOC); and,
average alkalinity
is < 60 mg/L. Treatment
challenges include:
water source is low in total dissolved solids (TDS) and
turbidity;
aquatic plants in lakes add TOC;
manganese can be present in lakes; and,
enhanced coagulation with ferric
chloride achieves 35% TOC
removal.
Treatment alternatives analysis:
ruled out expansion using
traveling bridge filters;
alternative 1 - conventional
flocculation/sedimentation dual
media filters; and,
alternative 2 - retrofit 1970s plant
with submerged membranes. Description of selected
membrane system design:
membrane system capacity = 5 mgd
(firm), 7.5 mgd total, process train
includes
automatic self-backwashing screens,
five minutes contact time in floc basins,
submerged membranes, and
chlorine contact basin.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 510 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 23 |
| Published : | 06/01/2006 |
