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, Canada Commissioning: December 2010 Challenge 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 Quality Treated Quality TOC 21 mg/L < 2 mg/L Hardness 536 mg/L 125 mg/L Turbidity 30 NTU < 0.1 NTU n.a. 99.9% reduction Parameter Cryptosporidium and Giardia Solution 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 Find a contact near you by visiting www.ge.com/water and clicking on “Contact Us”. * Trademark of General Electric Company; may be registered in one or more countries. ©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. Results 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 community. 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. Page 2 Case Study