Sanford Water Treatment Facility Case Study

Case Study
Sanford Water Treatment Facility
Application: ZeeWeed* UF and MUNI RO replaces
conventional lime/soda softening to improve
organics removal and expand capacity
Capacity: 92 lps (UF) and 70 lps (RO)
Location: Regional Municipality of Macdonald,
Sanford Water Treatment Facility, Manitoba,
Commissioning: December 2010
The Regional Municipality of Macdonald faced several challenges with its existing Sanford Water
Treatment Facility. Along with the need to expand
the capacity of their existing lime/soda softening
facility, the regional community required improved
pathogen protection and turbidity reduction, as well
as consistent water softening. Organics reduction
prior to chlorination was also a key deliverable in
order to minimize the potential for THM and other
disinfection by-product formation.
As an additional challenge, the municipality required
that all equipment be installed in the existing building and that the existing lime/soda softening system
remain operational during construction.
Raw Water
21 mg/L
< 2 mg/L
536 mg/L
125 mg/L
30 NTU
< 0.1 NTU
and Giardia
The municipality’s Consulting Engineer, GENIVAR,
selected GE Power & Water to provide a combination of its pressurized ZeeWeed 1500 Ultrafiltration (UF) and MUNI, Low Energy Reverse Osmosis
(LERO) membrane solutions for this treatment facility expansion. The combination of technologies
allows GE to provide water softening and organics
reduction as well as superior, multi-barrier turbidity reduction and pathogen protection; all in an
integrated package designed and supplied by GE,
the original membrane manufacturer.
The UF system combined with enhanced coagulation and oxidation also provides a high degree of
protection and pre-treatment for the LERO membrane modules; maximizing membrane life and
minimizing cleaning requirements.
Z-PAK* Pressurized Ultrafiltration System is GE’s
pre-engineered and skid mounted UF system utilizing ZeeWeed 1500 membrane modules. The
Z-PAK system consists of a pressurized feed system, which delivers raw water through the
strainer and valve rack and into the pressurized
ultrafiltration membranes. The hollow-fiber membranes filter the raw water with microscopic pores
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©2010, General Electric Company. All rights reserved.
CS1354EN.doc Sep-10
(0.02 micron) removing turbidity and pathogens,
while lowering the SDI and RO fouling potential of
the raw water.
The UF system also includes a backpulse and CleanIn-Place (CIP) system for automated membrane
cleaning, a compressed air system for membrane
integrity testing and valve actuation. All of these
systems function automatically, controlled and interfaced via a central electrical control panel and
PLC platform.
The MUNI Reverse Osmosis System consists of two
(2) LERO (Low Energy Reverse Osmosis) trains to
produce the required capacity of RO permeate to be
blended with UF permeate that bypasses the RO.
Each RO unit includes two multistage centrifugal
booster pumps, which increase the pressure of the
feed water to produce the desired permeate rate at
the corresponding operating conditions. The primary RO feed pressure is adjusted via a variable
frequency drive on the booster pumps to compensate for changes in operating conditions. The heart
of the RO system is the spiral wound LERO elements
configured in a two-stage array.
The selection of GE’s integrated Z-PAK Ultrafiltration and MUNI Reverse Osmosis Systems will result in the advanced treatment of Sanford’s raw
water, improving the overall quality of the water
for the Regional Municipality of MacDonald and its
The Z-PAK and MUNI systems are pre-designed
and skid mounted to promote quick delivery, while
maintaining precise engineering and detailed
specifications. The skid mounting of critical components ensures a simple installation and start-up
process; minimizing the contractor’s required time
on-site and enabling the Regional Municipality of
Macdonald to meet an aggressive construction
schedule for the expansion and upgrade of Sanford Water Treatment Facility.
The RO system is equipped with the capability to
perform an automatic permeate water flush upon
shut down from the CIP tank. This permeateflushing process removes contaminants that can
deposit on the membrane surface, which can degrade performance. In addition to flushing, the RO
is equipped with an individual stage cleaning process that can target specific contaminants.
Once the UF system is installed, the existing filters
will be decommissioned. At that time, the UF pretreatment and RO unit will then be installed. Finally,
the existing clarifier will be decommissioned.
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Case Study