Water. Desalination + reuse
Issue link: https://fhpublishing.uberflip.com/i/545366
SHOWCASE | 16 | Desalination & Water Reuse | August-September 2015 Doosan wins prize for part in zero liquiD Discharge project Doosan Hydro Technology was among the winners of the 2015 David W York Water Reuse Project of Year Award for its part in the city of Palm Coast's zero liquid discharge (ZLD) plant at Citation Boulevard, Florida. The Florida Water Environment Association (FWEA) awarded the prize to Doosan, the city's utility department and the project design engineer, McKim & Creed, The ZLD recovers and treats close to 100% of the concentrate produced at the water plant saving up to 6Ml of water each day. Previously, the water had to be discharged to a surface water body. The ZLD system started up earlier this year at Citation Boulevard. The primary components of the ZLD process are automated lime-soda softening and ultra-filtration (UF) systems. The softened water is conveyed to a UF system to remove additional solids. The ZLD-treated water is then disinfected before being blended with the existing water treatment plant permeate and raw water bypass. Sludge removed from the ZLD process is transferred to a solids handling system where it is thickened prior to dewatering. Various process streams, including the water removed from the sludge through thickening and dewatering, are recycled back into the ZLD treatment process, increasing the recovery of the system to nearly 100%. The city contracts with a hauler to reuse the dewatered lime solids in the production of concrete aggregate and paver base. The ZLD system was fully integrated into the existing plant so that the existing water treatment plant reverse osmosis system and the ZLD process operate as one treatment plant. Xylem releases hybriD water reuse system Water technology company, Xylem, has unveiled a system for water reuse as drinking water that harnesses chemical oxidation and biological treatment. Xylem's Leopold Oxelia is a multi-barrier system that deploys ozone oxidation to break down organic carbon into material that can be digested by naturally occurring microbes that are attached to a fixed bed filter. The aerobic biological treatment of the partially oxidized organic carbon leads to "complete destruction of total organic carbon (TOC), trace contaminants, and oxidation by- products," to produce "safe and reliable biologically-stable, treated water with no taste or odour issues," according to Xylem. Oxelia incudes a centralized control system which "optimizes the biofilter operation based on ozone dosage and effluent water quality, optimizing the backwash sequencing and biological activity in real time," said the manufacturer. Xylem showcased Oxelia at the American Water Works Association annual conference and exposition, ACE 15, held at Anaheim, California, 7-10 June. "Water reuse is a proven approach that can help meet growing water demands, producing high-quality water at a lower life-cycle R ec o g n i z e d T e ch no lo gy L e ad er P r ov e n N a n o c o m po s i t e M e m b r a ne C h e m i c a l I n n o v ati o n G l o ba l D e li v e r y & S up p o r t You already know our name. LG Chem, a leading global manuf ac turer of petrochemical goods, electronic materials and rechargeable batteries, has launched "LG Water Solutions". With its vast network of sales and service centers, expertise in roll-to-roll coating technology and its full line of high efficiency thin-film nanocomposite (TFN) reverse osmosis (RO) membranes, LG Water Solutions is poised to lead membrane treatment well into the next generation. Customers now have more options and better solutions than ever before. www.LGwatersolutions.com y & S up p o r t LGChemWaterSolutions_124x178.indd 2 7/22/2015 12:46:49 PM