The Water Filtration Plant (WFP) Improvements Project for the City of Kennewick,
Washington was initiated to determine the improvements needed to meet the City's
anticipated potable water quality and capacity needs. Submerged low-pressure
membranes offer a cost-effective "No Concrete" solution to expanding the WFP, which
treats Columbia River water in the summertime to supply peak system demands. This
7.5-million-gallons per-day (mgd) plant includes ozone, rapid mix, flocculation,
sedimentation, media filtration, and chlorine disinfection. This paper focuses on the
approach and key considerations utilized to implement this unique submerged
membrane retrofit project.
Although pressure membrane systems can be used to retrofit conventional water plants,
submerged membrane technology was better suited for Kennewick's needs. Zenon and
USFilter/Memcor are the two major suppliers of submerged membrane systems for
drinking water. The system designs are different for each supplier and final design
depends on the selected system.
Membrane system procurement is critical and establishing a fair and protest-proof
bidding environment is essential. The criteria for and test conditions of the membrane
pilot testing were developed with this in mind. Careful coordination with each vendor was
required to understand the filter building retrofit requirements for each system. Some
specific examples of system design parameters that impact the filter building retrofit are:
membrane basin depth, overhead crane/hoist capacity and lifting height for the
membranes, and locating the permeate pumps adjacent to the membrane tanks. Includes 4 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 650 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 21 |
| Published : | 06/17/2004 |
