PuraM® Case Studies
Laurel Cove Membrane Bioreactor Wastewater Treatment Plant for Water Reuse
The 1,000-acre Laurel Cove Golf & Country Club is being developed into the foremost golf and 800-lot-plus residential community in middle Tennessee. The decision makers had a strong desire to incorporate the best available technology to allow for water conservation leading to Bord na Móna being awarded a contract in October 2007 for the design and supply of a PuraM membrane bioreactor wastewater treatment plant. A tight schedule was required as local regulation required the wastewater plant to be constructed prior to building the homes. The installation was completed on schedule in April 2008.
The system installed at Laurel Cove includes 18 flat-plate PuraM membrane cassettes designed to treat a Phase 1 flow of 250,000 gallons per day (gpd) and to achieve a final effluent quality of 10mg/l BOD : 20mg/l TSS : 10mg/l TN. The design allows the final effluent to be used as a supply for irrigation water on the development’s Greg Norman-designed golf course.
The PuraM wastewater treatment plant is comprised of two treatment streams each designed to handle up to 125,000 gpd. Each stream has an anoxic/equalization tank and PuraM MBR tank. Consideration was made in the design to allow for upgrading the system in future phases for flows up to 1,000,000 gpd.
The PuraM Membrane Bioreactor was chosen because of its design that is particularly suitable for the decentralized market with an emphasis on reduced operational input, ease of maintenance and less complexity than comparable systems.
The flat-plate ultrafiltration membrane treatment technology is assembled into stainless steel membrane cassettes that consist of a unique integral dedicated air diffuser assembly that eliminates the need for back-pulsing or frequent chemical cleaning. The system does not require permeate pumps or any site-installed chemical dosing system while achieving a typical time between recovery cleans of approximately 12 months, significantly better than comparable water reuse systems.
Customers interested in learning more about the new PuraM system should call 1-800-787-2356 or email info@bnm-us.com.